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Relevant bibliographies by topics / Grinding circuits

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Academic literature on the topic 'Grinding circuits'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 January 2023

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Journal articles on the topic "Grinding circuits"

1

Benzer, H., L. Ergun, A. J. Lynch, M. Oner, A. Gunlu, I. B. Celik, and N. Aydogan. "Modelling cement grinding circuits." Minerals Engineering 14, no. 11 (November 2001): 1469–82. http://dx.doi.org/10.1016/s0892-6875(01)00160-1.

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Onuma, E., and M. Ito. "Separators in grinding circuits." Fuel and Energy Abstracts 37, no. 3 (May 1996): 173. http://dx.doi.org/10.1016/0140-6701(96)88385-8.

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Silva, André Carlos, Elenice Maria Schons Silva, and Ricardo Antonio de Rezende. "Circulating load calculation in grinding circuits." Rem: Revista Escola de Minas 67, no. 1 (March 2014): 101–6. http://dx.doi.org/10.1590/s0370-44672014000100015.

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A problem for solving mass balances in mineral processing plants is the calculation of circulating load in closed circuits. A family of possible methods for the resolution of these calculations is the iterative method, consisting of a finite loop where in each iteration the initial solution is refined in order to approach the exact solution. The present work presents a low-complexity iterative algorithm for circulating load calculation in mineral processing closed circuits, thus enabling the construction of reliable mass, metallurgical and water balances. The proposed equations on the algorithm were obtained through the analysis of many industrial systems, taking into account the process operational parameters. A validation was performed with real industrial data, in order to ensure a greater reliability of the obtained results. Two different types of closed circuits are presented, each one with different levels of complexity, to clarify the proposed algorithm. With the results, it is possible to affirm that the proposed iterative algorithm can be successfully applied to any kind of closed circuit in mineral processing. The results were satisfactory with respect to processing speed, convergence of the solution and the number of iterations required for the circulating load calculation.

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Liu, Yi, and Steven Spencer. "Dynamic simulation of grinding circuits." Minerals Engineering 17, no. 11-12 (November 2004): 1189–98. http://dx.doi.org/10.1016/j.mineng.2004.05.018.

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Neesse, Th, V. Golyk, P. Kaniut, and V. Reinsch. "Hydrocyclone control in grinding circuits." Minerals Engineering 17, no. 11-12 (November 2004): 1237–40. http://dx.doi.org/10.1016/j.mineng.2004.06.025.

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Kawatra, S. K., and T. C. Eisele. "Rheological effects in grinding circuits." International Journal of Mineral Processing 22, no. 1-4 (April 1988): 251–59. http://dx.doi.org/10.1016/0301-7516(88)90067-1.

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Delboni, Homero, Evandro Costa e Silva, Vladmir Kronemberger Alves, and Ana Carolina Chieregati. "Pre-Processing to Increase the Capacity of SAG Mill Circuits—Case Study." Minerals 12, no. 6 (June 6, 2022): 727. http://dx.doi.org/10.3390/min12060727.

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This paper describes the adopted approach for increasing the capacity of an existing industrial grinding circuit by adapting the respective configuration to process the ore from a new mine. Accordingly, due to Sossego mine exhaustion, Vale S. A. decided to use the existing industrial facilities and infrastructure for processing the Cristalino ore deposit located in Para state, within the Brazilian Amazon. Considering the higher hardness of Cristalino ore compared to Sossego ore, a reduction in capacity in the existing SAG grinding circuit was anticipated. A comprehensive grinding pilot plant campaign was conducted with a characterization program including 98 Cristalino ore samples, as described throughout this paper. Sossego grinding circuit was also surveyed for mathematical modeling and simulations to assess such an estimative further. The mathematical model calibration for setting different circuit configurations and operating conditions to enhance the circuit’s capacity was based on the combination of pilot plant results and ore characterization. Simulations indicated that a capacity increase of 12% would be achieved in the existing grinding circuit by further crushing 35% of SAG mill fresh feed. Such figures would represent yearly additions of 8.3 kt in copper and 250 kg in gold productions.

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Farzanegan, A., and A. Ebtedaei Ghalaei. "Simulation-Assisted Evaluation of Grinding Circuit Flowsheet Design Alternatives: Aghdarreh Gold Ore Processing Plant / Ocena Alternatywnych Schematów Technologicznych Procesu Rozdrabniania W Zakładach Przeróbki Rud Złota W Aghdarreh, Z Wykorzystaniem Metod Symulacji." Archives of Mining Sciences 60, no. 1 (March 1, 2015): 123–41. http://dx.doi.org/10.1515/amsc-2015-0009.

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Abstract The run of mine ore from Aghdarreh gold mine must be comminuted to achieve the desired degree of liberation of gold particles. Currently, comminution circuits include a single-stage crushing using a jaw crusher and a single-stage grinding using a Semi-Autogenous Grinding (SAG) mill in closed circuit with a hydrocyclone package. The gold extraction is done by leaching process using cyanidation method through a series of stirred tanks. In this research, an optimization study of Aghdarreh plant grinding circuit performance was done to lower the product particle size (P80) from 70 μm to approximately 40 μm by maintaining current throughput using modeling and simulation approach. After two sampling campaigns from grinding circuit, particle size distribution data were balanced using NorBal software. The first and second data sets obtained from the two sampling campaigns were used to calibrate necessary models and validate them prior to performing simulation trials using MODSIM software. Computer simulations were performed to assess performance of two proposed new circuit flowsheets. The first proposed flowsheet consists of existing SAG mill circuit and a new proposed ball mill in closed circuit with a new second hydrocyclone package. The second proposed flowsheet consists of existing SAG mill circuit followed by a new proposed ball mill in closed circuit with the existing hydrocyclone package. In all simulations, SAGT, CYCL and MILL models were selected to simulate SAG mill, Hydrocyclone packages and ball mill units. SAGT and MILL models both are based on population balance model of grinding process. CYCL model is based on Plitt’s empirical model of classification process in hydrocyclone units. It was shown that P80 can be reduced to about 40 μm and 42 μm for the first and second proposed circuits, respectively. Based on capital and operational costs, it can be concluded that the second proposed circuit is a more suitable option for plant grinding flowsheet modification.

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Ergin, H., and Ö. Acaroğlu. "Optimisation of Industrial Cement Grinding Circuits." Key Engineering Materials 264-268 (May 2004): 2173–78. http://dx.doi.org/10.4028/www.scientific.net/kem.264-268.2173.

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Borell, Michael, Per-Olof Bäckström, and Lars Söderberg. "Supervisory control of autogenous grinding circuits." International Journal of Mineral Processing 44-45 (March 1996): 337–48. http://dx.doi.org/10.1016/0301-7516(95)00044-5.

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Dissertations / Theses on the topic "Grinding circuits"

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Oghazi, Pejman. "Traceability in continuous grinding circuits /." Luleå : Division of Mineral Processing, Department of Chemical Engineering and Geosciences, Luleå University of Technology, 2008. http://epubl.ltu.se/1402-1757/2008/34/.

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Farzanegan, Akbar. "Knowledge-based optimization of mineral grinding circuits." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0027/NQ50158.pdf.

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Banisi, Samad. "An investigation of the behaviour of gold in grinding circuits." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=22400.

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A 7.6 cm (3") Knelson concentrator was used to estimate free gold content in samples extracted from industrial grinding and gravity circuits. Its recovery was comparable with that of amalgamation and the Mozley Laboratory Separator (MLS). It was then used for a study on gold grinding and classification behavior.
Laboratory studies of monosized gold and silica showed that gold produces fewer fines upon grinding: 75% of the mass reports to the next Tyler class, as opposed to 45% for silica. Disappearance from the monosized class (840-1200 $ mu$m) follows first order kinetics for both minerals. However, the rate constant of gold was five to six times lower than that of silica, and folding predominated over actual breakage. Folding yields either spherical or cylindrical particles which flatten upon additional impacting.
Smearing of gold onto silica and embedding of silica into gold flakes were observed. It was postulated that gold smearing can lead to metallurgical losses in flotation circuits. A gravity circuit could then increase overall gold recovery.
The Knelson concentrator was used to study the behavior of gold in the Hemlo mill grinding circuit. The ratio of the selection function of ore to gold increased from 6 at 50-100 $ mu$m to 20 at 500-1000 $ mu$m. In the primary cyclones, gold's cut size was much finer than the ore, 20 vs. 57 $ mu$m.

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Wikedzi, Alphonce Wendelin. "Optimization and performance of grinding circuits: the case of Buzwagi Gold Mine (BGM)." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2018. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-235098.

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Buzwagi Gold Mine (BGM) is operated by Acacia Mining and located in the Lake Victoria Goldfields of central Tanzania. The mine commenced its operation since April 2009 and treats a sulphide copper-gold ore to produce gold in form of doré bars and a concentrate containing gold, copper and silver. The BGM comminution circuit includes a primary crushing stage with a gyratory crusher and a two grinding circuits using a Semi-Autogenous Grinding (SAG) mill and a ball mill. The SAG mill circuit also includes a single-deck screen and a cone crusher while the ball mill circuit utilizes hydrocyclones. Currently, the grinding circuits are inefficient in achieving the aspired product fineness of xP,80 = 125 μm even at low to normal throughputs (450-600 t/h). An evaluation and optimization study of the circuit performance was conducted to improve the product fineness through circuit surveys, experimental lab work and simulations. In three full scale sampling campaigns, size distributions and solids contents of the samples were determined at selected points in the circuit. Further, several types of breakage tests were conducted; standard Bond tests to determine ore grindability and work indices, batch grinding tests to determine parameters for breakage and selection functions , and standard ball mill tests for mineral liberation characterization by an automated mineral liberation analyzer (MLA).The tests were conducted in a size range from 0.063 to 2 mm. Then, mass balance of the circuit was calculated and the models for mills, screens and hydrocyclones were employed in MODSIM (version 3.6.24). Firstly, simulations were conducted to optimize the existing plant. Several options were evaluated such as reduction of SAG screen aperture, adjustment of cyclone feed solids content and reduction of vortex finder and apex diameters. Moreover, simulations were also evaluated for a possible modification of the existing circuit and include; partial splitting of the cyclone underflow back to SAG mill, introduction of a second classification stage as well as introduction of a second ball mill. The evaluation of breakage tests and survey data revealed the following; the Bond work index obtained for the current ore ranges between 17.20 - 18.70 kWh/t compared to 14.50 - 16.50 kWh/t which was estimated during plant design.This indicates a change in hardness of the ore during the last 7 years. Harder ore means more energy requirement for an efficient operation, the consequence of which is increased costs. Thus, a periodic review of the ore hardness for ongoing mining operation is recommended. This will help in establishing better blends as well as prediction of appropriate tonnages for the existing ore types, so as to be efficiently treated by the available plant design. The work indices of the ore blends treated during survey were correlated with their quartz content and showed a strong linear relationship (R2= 0.95). Therefore, the work index for the BGM ore could be predicted based on known quartz content of the material. Further, the model could be used as a control tool for monitoring hardness variation of the SAG mill feed. The mineral liberation studies indicated that the valuable phase (pyrite-pyrrhotite) could be liberated at relatively coarser particle sizes (200-400 µm). This implies that, there could be no problem with the efficiency of the gravity circuit for the BGM operation, where the gold contained in pyrite-pyrrhotite could be easily concentrated. However, the efficiency of flotation and cyanidation processes will still require finer feed. In overall, the liberation characteristics of the ore blends treated during survey showed minor differences. The Bond efficiency factors of 48-61 % were obtained for the BGM grinding circuit, indicating an inefficient operation. This suggests that the operation could achieve targets by lowering the throughput. Further, the SAG mill circuit was characterized by fluctuating feed size of between xF,80 =102 to 185 mm. A need for control of the feed size as well as blending ratios was recommended for an efficient operation in terms of throughput and final product size. This could be achieved through closer monitoring of the primary crusher performance and proper control of the ratios for the SAG mill feeders drawing the ore from the stockpile. The ball mill grinding efficiency was poor and could be indicated by the fraction < 125 µm of only 5-9 % or xP, 80 : >400 µm in the mill discharge. This was deemed due to poor hydrocyclone performance which was characterized by higher feed solids content, coarser overflow xP,80: >200 µm as well as cut sizes, xT : > 200 µm. An improvement of product fineness up to 327 µm could be achieved during the simulation and optimization of the existing design. This could be achieved by modification of the operating conditions such as reduction of SAG screen aperture from 12 mm to 10 mm, reduction of vortex finder from 280 mm to 270.3 mm, reduction of apex diameter from 150 mm to 145.6 mm as well as adjustment of the cyclone feed solids content from 66.7 to 67.1 %. Based on this result, it was concluded that the current equipment could not achieve the target product quality (i.e. xP,80 = 125 µm ). Further simulations based on flowsheet modification options showed that a second ball mill (series configuration) can help to achieve the desired product fineness as well as an increase of throughput from 618 t/h to 780 t/h. Although the circulating load increases to approximately 500 % in this configuration, it is outweighed by the benefits. Importantly, this option is cost intensive and hence may be considered as a long term solution and especially after cost-benefit analysis. Finally, the results based on optimization of the existing design is recommended as short term solution for improvement of the BGM operation. Although the fineness achieved is still low (i.e. xP,80 = 327 µm) compared to the target (i.e. xP,80 = 125 µm), this gives additional advantage in the sense that, also better hydrocyclone performance is achieved in terms of overflow product (xP,80 = 105 µm vs. > 240 µm) , cut size (xT =133.1 µm vs. > 220 µm) and circulating load (CL =350 %). The improved overflow fineness will contribute to improved efficiency for the downstream processes.

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Liu, Lilan. "An investigation of gold recovery in the grinding and gravity circuits at Les Mines Camchib Inc. /." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59895.

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This thesis presents a research program designed to evaluate the performance of the gold gravity circuit at Les Mines Camchib Inc.
A detailed sampling program was conducted on the grinding and gravity circuits. Samples were screened and each size class was processed on a Mozley Laboratory Separator to determine free gold content. The performance of pinched sluices, Knelson concentrators, and a riffleless table is characterized on the basis of particle size, shape and liberation of gold. The amount of total gold and free gold in each size class of grinding circuit streams was also determined.
The pinched sluices recover from 8 to 17% gold in 4.8 to 7.3% of the mass. The double sluice recovers slightly more gold at a higher yield than the single sluice. In addition, the double sluice performed better at a higher feed density.
The 76 cm (30") Knelson recovers 62 to 71% of the feed gold, at very high upgrading ratios (326 to 480). Free gold recovery is high, generally above 90% for all size classes. Gold recovery decreases when wash water pressure is lowered from 100 to 40 kPa; a 90 minute cycle time does not cause concentrate overload, i.e. decreased gold recovery.
The 19 cm (7.5") Knelson used in the gold room yielded 90% recovery. Reprocessing the tails in the same unit give only a marginal gold recovery, suggesting that a single pass is adequate. Fine gold losses on the riffleless table are significant, especially in $-$38 $ mu$m (400 mesh).

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Murtagian, Gregorio Roberto. "Surface integrity on grinding of gamma titanium aluminide intermetallic compounds." Diss., Available online, Georgia Institute of Technology, 2005, 2004. http://etd.gatech.edu/theses/available/etd-08192004-181021/unrestricted/murtagian%5Fgregorio%5Fr%5F200412%5Fphd.pdf.

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Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2005.
Ashok Saxena, Committee Member ; Carlos Santamarina, Committee Member ; Thomas Kurfess, Committee Member ; Hugo Ernst, Committee Member ; Steven Danyluk, Committee Chair ; David McDowell, Committee Member. Vita. Includes bibliographical references.

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Amelunxen, Peter. "The application of the sag power index to ore body hardness characterization for the design and optimization of autogenous grinding circuits /." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=79995.

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The SAG Power Index test (SPI) is a tool for forecasting autogenous mill performance. Much effort has been directed towards the development of the process models relating SPI to throughput estimates, but little has been directed towards ore body modeling. Blending studies are presented showing that the SPI is not additive, affecting the geostatistical procedures. A method is given to ensure that additivity is respected during geostatistical interpolation. A procedure for relating mean SPI precision to sample spacing is given. This procedure is combined with a study of the process model error to estimate the precision of the mean throughput forecasts. A case study from Chino Mines is discussed. The relative throughput error is between 20 and 26 percent for perfect knowledge of SPI. For 100 m sample spacing at Chino, one third of the error is due to the process models and the rest to the SPI estimates.

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Ng, Sum Huan. "Measurement and modeling of fluid pressures in chemical mechanical polishing." Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-03022005-142857/unrestricted/ng%5Fsumhuan%5F200505%5Fphd.pdf.

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Thesis (Ph. D.)--Mechanical Engineering, Georgia Institute of Technology, 2005.
Steven Danyluk, Committee Chair ; Richard Salant, Committee Member ; Jeffrey Streator, Committee Member ; Michael Sacks, Committee Member ; Dennis Hess, Committee Member ; Leonard Borucki, Committee Member. Includes bibliographical references.

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Wikedzi, Alphonce Wendelin [Verfasser], Urs Alexander [Akademischer Betreuer] Peuker, Urs Alexander [Gutachter] Peuker, and Holger [Gutachter] Lieberwirth. "Optimization and performance of grinding circuits: the case of Buzwagi Gold Mine (BGM) / Alphonce Wendelin Wikedzi ; Gutachter: Urs Alexander Peuker, Holger Lieberwirth ; Betreuer: Urs Alexander Peuker." Freiberg : Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2018. http://d-nb.info/1221070355/34.

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Gumulya, Monica. "The settling of spheres in viscoplastic fluids." Thesis, Curtin University, 2009. http://hdl.handle.net/20.500.11937/2163.

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In this thesis, several significant contributions have been made towards the understanding of the flow behaviour of viscoplastic fluids and the settling behaviour of particles in these fluids. The attainment of this knowledge is highly crucial for the development of large-scale simulations of the movement of particles in tertiary grinding circuits, through which effective cost and resource saving strategies for the design and operation of these highly resource-demanding unit processes could be developed.To achieve the underlying objective of this thesis, the settling-sphere problem was approached using both experimental and numerical techniques. Experimentally, the flow behaviour of the viscoplastic slurries was represented by viscoplastic (aqueous) solutions of polyacrylamide. The settling behaviour of two spheres, using two different configurations of initial sphere positions, was then examined. In the first configuration, the two spheres are vertically-aligned, i.e. one sphere is released following the flow path of another sphere that has been released some time earlier into the fluid medium. In the second configuration, the two spheres are horizontally aligned, with a set distance apart, and released simultaneously into the viscoplastic solution. One of the major accomplishments achieved during the design of these experiments was the development of a stereo-photogrammetry sensor system, through which the 3D movement of spheres falling through the fluid could be determined to within ~ 1.5 mm accuracy.The numerical part of this study was conducted using Computational Fluid Dynamics (CFD) technique. Based on the Volume of Fluid (VOF) method, the settling particles were represented by fluids of very high viscosity (~ 400 – 1000 Pa.s). By implementing appropriate discretisation and approximation methods, the effects of numerical smearing and diffusion, as well as the level of deformation in the settling particles, could be minimised. A time-dependent estimation of the flow behaviour of the test fluids was then developed and implemented into this numerical scheme, using a series of User Defined Functions (UDFs).The development of the UDFs in the CFD analysis was based on the results of the rheometric assessment of the test fluids, through which it was found that these solutions possess a level of time dependency resulting from both thixotropy and elasticity. A new fluid model was thus developed, based on a scalar parameter that represents the integrity of the structural network configuration, resulting from the hydrogen bonding between the polyacrylamide and water molecules in the fluid. Although the resulting fluid model does not exclusively feature a yield stress value, the results of a series of dynamic analyses conducted on this model were found to be similar to those found experimentally, in which fluids that were initially ‘undisturbed’ or intact in structure have been found to require the application of stresses that are significantly larger in magnitude for the initiation of its deformation than in cases where the structure of the fluid is already deformed. Due to these dynamic characteristics, in which the fluid model seems to feature yield stress-like quality that dissipates once the ‘structure’ of the fluid has been deformed due to the application of shear, this fluid model was termed ‘semi-viscoplastic’.Using the analytical techniques outlined above, two significant contributions were made towards the understanding of the settling behaviour of particles in viscoplastic fluids. First, the settling velocity of particles falling in the fluid medium was found to be highly dependent on the structural condition of the fluid, i.e. whether it has recently been subjected to shear or whether sufficient time has been allowed for the fluid to recover its original viscous parameters. Based on this finding, a new generalised correlation was developed, through which predictions of the settling velocity of particles falling in fluids of various structural conditions can be made with much greater accuracy than before. The second contribution was in the understanding of the interaction tendencies between spheres that are settling in close proximity to each other. Through experimental and numerical analyses, it was found that the interaction tendencies of the particles are highly dependent on the elastic properties of the fluids. Correlations relating the tendencies of the spheres to interact with the elastic and viscous properties of the fluid were then developed. Through both of these contributions, aspects that are critical for the understanding of the motion of solid bodies in grinding circuits have been addressed.

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Books on the topic "Grinding circuits"

1

Hoffman, Alan Donald. A soft-wall permeameter for online characterization of grinding circuits. [s.l: s.n.], 1989.

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International Symposium on Chemical Mechanical Planarization in Integrated Circuit Device Manufacturing (4th 2000 Phoenix, Ariz.). Chemical mechanical planarization IV: Proceedings of the International Symposium. Edited by Opila R. L, Electrochemical Society. Dielectric Science and Technology Division., Electrochemical Society Electronics Division, and Electrochemical Society Meeting. Pennington, NJ: Electrochemical Society, Inc., 2001.

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International Symposium on Chemical Mechanical Planarization in Integrated Circuit Device Manufacturing (6th 2003 Orlando, Fla.). Chemical mechanical planarization VI: Proceedings of the international symposium. Edited by Seal S, Electrochemical Society Electronics Division, and Electrochemical Society Meeting. Pennington, NJ: Electrochemical Society, 2003.

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International, Symposium on Chemical Mechanical Planarization in Integrated Circuit Device Manufacturing (5th 2002 Philadelphia Pa ). Chemical mechanical planarization V: Proceedings of the International Symposium. Pennington, NJ: Electrochemical Society, Inc., 2002.

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Rajamani, Kuppuswamy. Optimal control of closed circuit ball mill grinding. Ann Arbor, MI: UMI Dissertation Services, 1990.

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Lachapelle, Daniel J. Grinding circuit simulation of St Andrew Goldfields Stock Mill. Sudbury, Ont: Laurentian University, School of Engineering, 2000.

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Xiao, Zhixian. Developing simple regression for predicting gold gravity recovery in grinding circuit. Montreal, QC: McGill University, Dept. of Mining, Metals and Materials Engineering, 2001.

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Canada Centre for Mineral and Energy Technology. Spoc Simulated Processing of Ore and Coal: Chapter 2.2 Grinding Circuit Sampling. S.l: s.n, 1985.

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Borst, Christopher L. Chemical-mechanical polishing of low dielectric constant polymers and organosilicate glasses: Fundamental mechanisms and application to IC interconnect technology. Boston: Kluwer Academic Publishers, 2002.

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Lounsbury, David Michael. Optimization of the Kidd Creek Mine primary grinding circuit and subsequent model development. Sudbury, Ont: Laurentian University, School of Engineering, 1995.

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Book chapters on the topic "Grinding circuits"

1

Chen, Xisong, Jun Yang, Shihua Li, and Qi Li. "An Improved Control Strategy for Ball Mill Grinding Circuits." In Lecture Notes in Computer Science, 409–15. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-15621-2_45.

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Tie, Ming, Heng Yue, and Tianyou Chai. "A Hybrid Intelligent Soft-Sensor Model for Dynamic Particle Size Estimation in Grinding Circuits." In Advances in Neural Networks – ISNN 2005, 871–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/11427469_138.

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Keviczky, L., M. Hilger, and J. Kolostori. "Modelling of Open Circuit Grinding." In Mathematics and Control Engineering of Grinding Technology, 33–48. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2249-5_4.

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Julio, Binvignat T., and Omori V. Jorge. "La Coipa modified grinding circuit, Chile." In Mining Latin America/Minería Latinoamerica, 103–9. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1216-1_8.

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Keviczky, L., M. Hilger, and J. Kolostori. "Material Flow Models of Closed-Circuit Grinding." In Mathematics and Control Engineering of Grinding Technology, 49–83. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-2249-5_5.

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Barratt, D. J. "Grinding circuit design: concepts for small mines." In Mining Latin America / Minería Latinoamericana, 27–34. Dordrecht: Springer Netherlands, 1986. http://dx.doi.org/10.1007/978-94-017-2286-5_3.

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Meira, Julia Mourão, and Roberto Seno Junior. "Increasing Extraction Efficiency Using a Closed Grinding Circuit." In Light Metals 2014, 55–58. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118888438.ch9.

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Meira, Julia Mourão, and Roberto Seno Junior. "Increasing Extraction Efficiency Using a Closed Grinding Circuit." In Light Metals 2014, 55–58. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-48144-9_9.

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Rim, Guizani, Mokni Inès, Mhiri Hatem, and Philippe Bournot. "CFD Modeling of the High Efficiency Rotor Separator in Cement Grinding Circuit." In Lecture Notes in Mechanical Engineering, 365–72. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-37143-1_44.

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Mesinas Romero, M. A., I. Rivera Landero, M. I. Reyes Valderrama, E. Salinas Rodríguez, J. Hernández Ávila, E. Cerecedo Sáenz, and E. G. Palacios Beas. "Preliminary Study of the Effect of Stirring Rate, Temperature and Oxygen Pressure on the Leach Rate of Copper Powder, Generated by Grinding of Printed Circuit Boards of Computer." In Characterization of Minerals, Metals, and Materials 2017, 699–707. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51382-9_77.

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Conference papers on the topic "Grinding circuits"

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Suarez, Daniel, Vinícius Lisboa de Souza, and Ian Dehart. "APPLICATIONS OF VERTIMILL IN GRINDING CIRCUITS." In 44º Seminário de Redução de Minério de Ferro e Matérias-primas, 15º Simpósio Brasileiro de Minério de Ferro e 2º Simpósio Brasileiro de Aglomeração de Minério de Ferro. São Paulo: Editora Blucher, 2014. http://dx.doi.org/10.5151/2594-357x-25378.

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Chivas, Robert, and Scott Silverman. "Adaptive grinding and polishing of packaged integrated circuits." In 2014 IEEE International Reliability Physics Symposium (IRPS). IEEE, 2014. http://dx.doi.org/10.1109/irps.2014.6861143.

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Boulvin, M., R. Lepore, and M. Remy. "On the unstable behavior of cement grinding circuits." In 1999 European Control Conference (ECC). IEEE, 1999. http://dx.doi.org/10.23919/ecc.1999.7099411.

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Boulvin, M., A. Vande Wouwer, C. Renotte, M. Remy, and R. Lepore. "Some observations on modeling and control of cement grinding circuits." In Proceedings of the 1998 American Control Conference (ACC). IEEE, 1998. http://dx.doi.org/10.1109/acc.1998.688411.

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Inapakurthi, Ravi kiran, Srinivas Soumitri Miriyala, Suryanarayana Kolluri, and Kishalay Mitra. "Nonlinear Model Predictive Control of Industrial Grinding Circuits using Machine Learning." In 2020 IEEE Symposium Series on Computational Intelligence (SSCI). IEEE, 2020. http://dx.doi.org/10.1109/ssci47803.2020.9308181.

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Ping Zhou, Tianyou Chai, Heng Yue, Jinliang Ding, and Dayong Zhao. "Intelligent Optimal Control of Grinding Circuits for Optimization of Particle Size Index." In 2006 6th World Congress on Intelligent Control and Automation. IEEE, 2006. http://dx.doi.org/10.1109/wcica.2006.1714356.

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Chivas, Robert, Scott Silverman, and Michael DiBattista. "Adaptive Grinding and Polishing of Silicon Integrated Circuits to Ultra-Thin Remaining Thickness." In ISTFA 2015. ASM International, 2015. http://dx.doi.org/10.31399/asm.cp.istfa2015p0460.

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Abstract Anticipating the end of life for IR-based failure analysis techniques, a method of global backside preparation to ultra-thin remaining silicon thickness (RST) has been developed. Ultra-thin RST enables VIS light techniques such as laser voltage probing. In this work we investigate the lower RST limit due to sub-surface damage from grinding and a one-step polishing method to achieve 3 um RST (+/- 0.8 um) over 121 mm2 die (11 x 11 mm) test package as well as 5 um (+/- ) over 109.2 mm2 (8.0 x 13.7mm) active device.

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Chivas, Robert, Scott Silverman, Michael DiBattista, and Ulrike Kindereit. "Electrical Invasiveness of Grinding and Polishing Silicon Integrated Circuits Down to 1 μm Remaining Silicon Thickness." In ISTFA 2016. ASM International, 2016. http://dx.doi.org/10.31399/asm.cp.istfa2016p0166.

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Abstract Anticipating the end of life for IR-based failure analysis techniques, a method of global backside preparation to ultra-thin remaining silicon thickness (RST) has been developed. When the remaining silicon is reduced, some redistribution of stress is expected, possibly altering the performance (timing) of integrated circuits in addition to electron-hole pair generation. In this work, a study of the electrical invasiveness due to grinding and polishing silicon integrated circuits to ultra-thin (< 5 um global, ~ 1 um local) remaining thickness is presented.

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Wangkanklang, Ekkawit, Tomoya Hayashi, and Yoshikazu Koike. "Progress Estimation of Mixing and Grinding Process using Sound Analysis in Ultrasonic Frequency." In 2022 37th International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC). IEEE, 2022. http://dx.doi.org/10.1109/itc-cscc55581.2022.9895048.

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Subramanian, S., P. Schani, E. Widener, P. Liston, J. Moss, and V. Soorholtz. "A Selected Area Planar TEM (SAPTEM) Sample Preparation Procedure for Failure Analysis of Integrated Circuits." In ISTFA 1998. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.istfa1998p0131.

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Abstract A selected area planar TEM (SAPTEM) sample preparation technique for failure analysis of integrated circuits using a transmission electron microscope has been developed. The technique employs a combination of mechanical grinding, selective wet/dry chemical etching (if required) and a two step focused ion beam IIFIB) milling. The mechanical grinding steps include: (a) a backside grind to achieve a die thickness less than 30 µm, (b) the support half ring glue, and (c) a cross-section grind from one side to reach less than 35 pm to the failing site. A selective wet or dry chemical etch is applied before, between,, or after FIB thinning depending on the nature of problem and device components. The FIB milling steps involve: (is) a high ion current cross-sectional cut to reach as close as 5-8 µm to the area of interest (b) a final planar thinning with the ion beam parallel to the surface of the die. The plan view procedure offers unique geometric advantage over the cross-section method for failure analysis of problems that are limited to silicon or certain layers of the device. Iln the cross-sectional approach, a thin section (thickness less than 250 µm) of a device is available for failure analysis, whereas in the planar procedure a 20 µm2 area of any layer (thickness less than 250 µm) of the device is available. The above advantage has been successfully exploited to identify and solve the following prablems in fast static random access memories (FSRAM): (i) random gateoxide rupture that resulted in single bit failures, (ii) random dislocations from the buried contact trenching that caused single bit failures and general silicon defectivity (e.g. implant damage and spacer edge defects), and (iii) interracial reactions.

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Reports on the topic "Grinding circuits"

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Mular, A., C. Larsen, and D. Laguitton. The SPOC manual Chapter 2.2 grinding circuit sampling. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1985. http://dx.doi.org/10.4095/305013.

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