Relevant bibliographies by topics / Dry fine grinding

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Dry fine grinding'

Author: Grafiati
Published: 4 June 2021
Last updated: 17 February 2022

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Journal articles on the topic "Dry fine grinding"

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Kaya, E., H. Cho, and R. Hogg. "Reagglomeration phenomena in fine dry grinding of coal." Mining, Metallurgy & Exploration 14, no. 2 (May 1997): 37–42. http://dx.doi.org/10.1007/bf03402757.

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Prziwara, Paul, and Arno Kwade. "Grinding aid additives for dry fine grinding processes – Part II: Continuous and industrial grinding." Powder Technology 394 (December 2021): 207–13. http://dx.doi.org/10.1016/j.powtec.2021.08.039.

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Gokcen, H. S., S. Cayirli, Y. Ucbas, and K. Kayaci. "The effect of grinding aids on dry micro fine grinding of feldspar." International Journal of Mineral Processing 136 (March 2015): 42–44. http://dx.doi.org/10.1016/j.minpro.2014.10.001.

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Toraman, O. Y. "Dry Fine Grinding of Calcite Powder by Stirred Mill." Particulate Science and Technology 31, no. 3 (May 2013): 205–9. http://dx.doi.org/10.1080/02726351.2012.694135.

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Zeng, Y., and E. Forssberg. "Energy consumption in fine crushing and dry rod grinding." Mining, Metallurgy & Exploration 9, no. 2 (May 1992): 69–72. http://dx.doi.org/10.1007/bf03402973.

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Weng, Rengui, Jinqi Jiang, Jun Qu, Xinfei Li, Qiwu Zhang, and Xinzhong Liu. "Effect of grinding aids and process parameters on dry fine grinding of polytetrafluoroethylene." Powder Technology 386 (July 2021): 1–8. http://dx.doi.org/10.1016/j.powtec.2021.03.040.

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Prziwara, Paul, and Arno Kwade. "Grinding aids for dry fine grinding processes – Part I: Mechanism of action and lab-scale grinding." Powder Technology 375 (September 2020): 146–60. http://dx.doi.org/10.1016/j.powtec.2020.07.038.

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Prziwara, P., S. Breitung-Faes, and A. Kwade. "Comparative study of the grinding aid effects for dry fine grinding of different materials." Minerals Engineering 144 (December 2019): 106030. http://dx.doi.org/10.1016/j.mineng.2019.106030.

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Ozkan, Alper, and Meftuni Yekeler. "Fine Dry Grinding of Zeolite in a Laboratory Ball Mill." Particle & Particle Systems Characterization 20, no. 4 (September 2003): 276–82. http://dx.doi.org/10.1002/ppsc.200390033.

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Schwarzwälder, Sophie, Roland Nied, and Hermann Sickel. "Dry Fine Grinding with Jet Mills: Potentials of Energy Optimization." Chemical Engineering & Technology 37, no. 5 (April 3, 2014): 806–12. http://dx.doi.org/10.1002/ceat.201300692.

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Dissertations / Theses on the topic "Dry fine grinding"

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Karinkanta, P. (Pasi). "Dry fine grinding of Norway spruce (Picea abies) wood in impact-based fine grinding mills." Doctoral thesis, Oulun yliopisto, 2015. http://urn.fi/urn:isbn:9789526207193.

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Abstract Wood powders are used in numerous applications such as thermoplastics and filters, and a lot of research effort has been put into developing novel ways of utilising them. The mechanical processing of wood powders, especially at particle sizes below 100 µm, has been reported in several studies, but they lack information on the effect of fine grinding conditions on the particle morphology and cellulose crystallinity, both of which are important parameters in the further processing of wood powders and in their various applications. This makes it very difficult to design and optimise fine grinding processes with different applications in mind. The aim of this thesis was to study the dry fine grinding of wood in several impact-based fine grinding mills in order to find out their effect on the properties of the wood and to study the energy required for the mechanical processing of the resulting powders. The effect of the main operational parameters on the properties of dried Norway spruce wood and the energy consumption was studied using three impact-based fine grinding mills that were capable of pulverising the wood down to a median particle size of less than 25 µm. It was found that the impact events occurring in media mills can be used for the production of very fine wood powders with lower cellulose crystallinity and rounder shaped particles having more uniform shape distribution than powders pulverised to a similar size range by means of impact events in non-media mills. A practical estimate was obtained for the minimum specific energy consumption in fine grinding in mills involving grinding media that could be utilised as a target for optimisation. Impact-based media milling under cryogenic conditions can be used to obtain different Norway spruce wood powders from those produced under ambient grinding conditions, i.e. without the freezing effect of nitrogen liquid. The energy efficiency of fine grinding can be enhanced by choosing cryogenic rather than ambient conditions. The moisture content of the wood has greater influence on the size and shape of the particles when milling is accomplished under ambient conditions. Torrefaction can reduce the energy consumption in impact-based media mills for median particle sizes over 17.4 µm (± 0.2 µm), while the shape and cellulose crystallinity of the particles are not significantly affected by torrefaction pretreatment as a function of energy consumption
Tiivistelmä Puujauheita käytetään laajalti erilaisissa sovelluksissa, kuten esimerkiksi biokomposiiteissa ja suodattimissa. Tämän lisäksi on olemassa paljon tutkimustietoa siitä, kuinka puujauheita voitaisiin hyödyntää laajemminkin. Puu voidaan mekaanisesti prosessoida alle 100 µm:n kokoluokkaan, mutta yksityiskohtaista tietoa kuivahienojauhatuksen olosuhteiden vaikutuksesta jauheiden morfologiaan ja selluloosan kiteisyyteen ei ole saatavilla. Puujauheen morfologialla ja selluloosan kiteisyydellä on kuitenkin merkittävä vaikutus sovelluksia ja jatkojalostusta ajatellen. Puun kuivahienojauhatuksen tiedon puute hankaloittaa merkittävästi prosessin suunnittelua ja optimointia erilaisia sovelluksia varten. Tämän väitöskirjan tavoitteena on selvittää iskuihin perustuvien hienojauhimien vaikutukset puun ominaisuuksiin ja tutkia mekaanisen prosessoinnin energiatehokkuutta hienojauhatuksessa. Tutkimuksessa selvitettiin kolmen erilaisen iskuun perustuvan hienojauhatusmyllyn pääasiallisten operointiparametrien vaikutusta kuivatun metsäkuusen ominaisuuksiin ja energiankulutukseen. Jokaisella hienojauhimella onnistuttiin tuottamaan puujauhoja, joiden mediaanikoko oli alle 25 µm. Iskuihin perustuvalla jauhinkappalemyllyllä saatiin tuotettua puujauhoa, jonka selluloosan kiteisyys on alhaisempi ja partikkelimuodot pyöreämpiä verrattuna samankokoisiin puujauhoihin, jotka on tuotettu iskuihin perustuvilla jauhinkappaleettomilla hienojauhatusmyllyillä. Työssä saatiin käytännöllinen arvio kuivatun metsäkuusen hienojauhatuksen minimienergiankulutukselle iskuihin perustuville jauhinkappalemyllyille, mitä voidaan käyttää kyseisten myllytyyppien optimoinnin tavoitteena. Työssä havaittiin lisäksi, että kryogeenisiä jauhatusolosuhteita käyttämällä voidaan tuottaa erilaisia puujauhoja verrattuna puujauhoihin, jotka prosessoidaan ilman nestetyppijäädytystä, kun jauhatus suoritetaan iskuihin perustuvalla jauhinkappalemyllyllä. Ilman nestetyppijäädytystä puun kosteuspitoisuudella on merkittävämpi vaikutus puujauhojen ominaisuuksiin kuin kryogeenisissä olosuhteissa jauhetuilla. Kryogeenisillä jauhatusolosuhteilla voidaan parantaa myös jauhatuksen energiatehokkuutta. Torrefioinnilla voidaan vähentää hienojauhatuksen energiankulutusta iskuihin perustuvilla jauhinkappalemyllyillä, kun tavoitekoon mediaani on yli 17,4 µm (± 0,2 µm). Torrefioinnilla ei ole vaikutusta selluloosan kiteisyyteen tai partikkeleiden muotoon energiankulutuksen funktiona
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Book chapters on the topic "Dry fine grinding"

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Zhang, Qiwu, Junya Kano, and Fumio Saito. "Chapter 11 Fine Grinding of Materials in Dry Systems and Mechanochemistry." In Particle Breakage, 509–28. Elsevier, 2007. http://dx.doi.org/10.1016/s0167-3785(07)12014-5.

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"TABLE 11 Common Methods of Processing Sorghum for Use in Livestock Feed Category Type of process Procedure Characteristics Mechanical action Grinding/Rolling Particle size reduction using hammer, Most commonly used, least expensive. plate, pin, or roller mills. Increase feed efficiency and digestibility by 10-20% of whole grain. Wet process Reconstitution Increase grain moisture to 25-30%. Wet Improves feed efficiency about 10-15% grain is anaerobically stored for 2-3 over dry ground grain due to higher weeks prior to grinding and feeding. protein and energy digestibility. Early harvest Grain is harvested at 20-30% moisture Similar to reconstitution. and stored anaerobically or with organic acids (e.g., propionic). Grain is ground prior to or after storage. Soaking Soak grain in water for 12-24 h. Feed Tendency for grain to ferment or sour. whole or crush. Only limited use. Heat and moisture Steam-rolling Grain subjected to live steam (180°F) Slight increase over dry rolling. Reduces 3-5 min then rolled. fines and dust. Steam-flaking Grain exposed to high moisture steam Most common method in feedlots. Thin for 5-15 min to reach 18-20% flaking of sorghum increases moisture. Then grain is rolled to digestibility and feed efficiency equal desired flake thickness. to that of reconstitution. Pelleting Ground grain is conditioned with steam, Reduces dust, improves palatability, forced through a die, and pellets are uniformity, and handling of feeds. cooled. Prevents segregation of micronutrients. Exploding Grain exposed to high-pressure steam, Similar to puffing of cereals for breakfast the starch is gelatinized, the pressure foods. Feed efficiency is similar to is decreased, and rapid expansion of steam flaked or reconstituted grain. the kernel occurs. Hot dry heat Popping Hot, dry air expansion of grain. Bulk Ruptures endosperm increasing starch density is low. Density is increased availability. Feed efficiency is similar by spraying with water and rolling to steam flaking or reconstitution. sometimes. Micronizing Heat grain with gas-fired infrared Feed efficiency similar to steam flaking, burners to the point of eversion exploding or popping. Bulk density followed by rolling through a roller similar to steam-flaked grain. mill. From Refs. 14, 43, 44, and 86. sorghums, especially waxy endosperm types, have im-sorghum production is consumed directly by humans proved feed-processing properties [62]. [71,88]. Moist, dry, and semi-moist pet foods contain sorghum at For the production of most traditional foods, sorghum is various levels depending upon the formulation. The avail-decorticated using a wooden mortar and pestle. Hand-ability of new food-type sorghums with light color and decortication is a laborious chore generally done by house-bland flavor will lead to more use of sorghum in pet foods. wives. Sorghums with thick pericarp and hard endosperm are preferred because they are easier to decorticate [93]. In some instances, mechanical dehullers are used to service Xl. PROCESSING FOR FOOD small villages and urban areas. Milling yields are related to A. Traditional Food Systems kernel hardness, size, and shape. Most of the sorghums are milled to remove 10-30% of the original weight. The use Sorghum is processed into many different traditional foods of diesel or electrically powered abrasive mills for de-around the world (Table 12). About 30-40% of world hulling and grinding has been increasing slowly." In Handbook of Cereal Science and Technology, Revised and Expanded, 180–92. CRC Press, 2000. http://dx.doi.org/10.1201/9781420027228-21.

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Conference papers on the topic "Dry fine grinding"

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Trass, O., E. A. J. Gandolfi, E. J. Anthony, and M. Maryamchik. "Reactivation of Fluidized Bed Combustor Ashes: Economic Evaluation and Implementation." In 18th International Conference on Fluidized Bed Combustion. ASMEDC, 2005. http://dx.doi.org/10.1115/fbc2005-78121.

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When high-sulfur-content coal or coke is used as fuel in fluidized bed combustors, a large excess of limestone or dolomite must be added for good SOx capture. All of the limestone is calcined but only 30–40% is actually sulfated. The resultant ashes are difficult to dispose of because of the free calcium oxide. These ashes can be reactivated for further SOx capture. A proposed, economic process involves wet grinding of the ashes with sufficient excess water to allow both complete hydration and good grinding conditions. To prevent cementitious solidification of the wet product, it is then mixed with selected dry materials, for example fine coal, to absorb the excess water. Wet waste coal fines or sludges may also be used, then both to provide the water and prevent solidification. The product is then granulated with the cementitious reactions providing a binder for the granules. Good results with large additional SOx capture have been observed both in a small pilot-sized CFBC and during a 54-hour utility boiler test in a 35 MWt boiler. Calcium utilization was nearly doubled, with significant reduction of CO2 emissions. Based on the test results, quick equity payback is expected with savings from reduced limestone purchase and ash disposal costs. In collaboration with The Babcock and Wilcox Company (B&W), a long test program at the Southern Illinois University in Carbondale, IL is planned.
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Balawajder, Peter, Jeffrey Steward, Alfonso Ortega, Joe D’Silva, Anne Moore, and Luis Silva. "Investigation of a Novel Process for Wet Milling a Pharmaceutical Tablet in a Dynamically Rotating Water-Filled Dosage Cup." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10669.

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The most common commercial pharmaceutical dosage forms are tablets and capsules, but unfortunately these forms may not be suitable for sub-groups, such as very ill children and elderly patients and those experiencing trauma and involved in surgery. Many of these patients have difficulty in swallowing a solid dosage form. For these groups, the general practice is to use equipment such as the age-old mortar and pestle to pulverize the tablet, transfer the powder to a container and then make a liquid suspension by addition of water. This process consists of two unit processes: dry grinding followed by creation of a water suspension. This paper reports on the evaluation of a novel wet milling method for performing these unit operations in a single water-filled dosage cup. The basic concept is that the partially water-filled cup is rotated or spun about its axis to produce relative motion between the tablet and the cup surfaces. The cup surfaces are textured so that material is abraded from the tablet when it strikes the cup walls. The complex water motion assists in “softening” the tablet, abrading particulates from its surface, and producing a fine aqueous suspension. Experimental investigations were performed on two concepts. The first method utilized intermittent single axis cup rotation to produce relative motion between the tablet and cup surfaces. The second concept involved rotating the spinning cup on a rotating arm and also about its own axis. The centrifugal force of the arm rotation pressed the tablet against the spinning cup wall, thereby increasing the shearing force. The efficiency of both methods was investigated analytically and experimentally. The effects of rotation rates, intermittent duty cycles, and water fill volumes were examined and compared.
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