By D. A. Dahlstrom, W.-P. Kam (auth.), John Hanna, Yosry A. Attia (eds.)
Processing of excellent debris has provided a variety of demanding situations to scientists and engineers for a few years. significant development has al prepared been made in assembly those demanding situations throughout a variety of fields of functions worldwide. study on each element of excellent particle processing has won momentum in recent times, leading to the improvement of latest strategies, enhanced items, and higher figuring out of the technology and engineering basics of good debris. This symposium addressed the new growth in positive debris processing, quite within the creation of minerals for chemical substances, pigments and steel creation, ceramic fabrics, and fossil fuels. This e-book represents the edited lawsuits of the foreign Symposium on Advances in superb debris Processing, the place chosen peer-reviewed papers describe present practices, evaluate the state-of-the-art and file unique primary and utilized examine on tremendous particle creation, sizing, characterization of the interface, fluid movement, and interparticle colloidal interactions, resulting in dispersion, flocculation and flotation. Processing of good debris by means of multi-chemical, actual and organic phenomena has additionally been addressed. consequently, the ebook contains seven elements, with every one half addressing a particular subject. half One offers with construction of excellent debris by way of comminu tion equipment the place diverse milling practices, mathematic modeling and actual chemical keep watch over tools are mentioned. half covers particle circulate homes in numerous fluids. half 3 addresses floor and colloidal phenomena in nice particle processing, whereas half 4 maintains this subject yet with emphasis on clay minerals.
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Additional info for Advances in Fine Particles Processing: Proceedings of the International Symposium on Advances in Fine Particles Processing
W. Maekenzie, Trans. AlME, (1966) pp. 82-87. 16. K. Ananthpadmanabhan, P. W. Healy, "Chemistry of Oleate and Amine Solutions in Relation to Flotation," Trans. AlME, V. 266 (1979) pp. 2003-2009. ----- 17. "Communition and Energy Consumption," Report of the Committee on Comminution and Ener~y Consumption, National Aead. Press, Washington, DC (1981) p. 47. 18. N. Bultler, lonie Equillibrium, Addison-Wesley, Reading, MA (1964) p. 287. COMMINUTION AND ASH REDUCTION OF COAL PARTICLES MASAAKI NAKAMURA, NAOKI ITO, YUKIO SAKURAI, and SHIGEKI TOYAMA Department of Che~ieal Engineering, Nagoya University, Furo-eho, Chikusa-ku, Nagoya 464-01, Japan ABSTRACT In the mineral proeessing industry, there are two purposes in erushing and grinding operation.
It is noticeable that the treatment with ammonia gas was effective for the comminution of coarse particles. al. also reported that the effect of treatment with liquefied ammonia was observed in the ball mill comminution of coarse eoal particles above 325 mesh (about 500~m) but not found under 250~m [lJ. 9 ....... J::. l! 5 ::l U t (min) Irealed w ith NH l untreated 0. 1 50 100 2 4 8 0 /'::,. 0 - j'" • 5001000 X(~m) FIG. 2 Rosin-Rammler diagram of cumulative size distribution of Miike coal ground with steel balls 60 Ash Distribution of Ground Produets Figure 3 and 4 show the distribution of ash weight pereentage, w, of ground produets, whieh were sieved and then measured by the ignition mcthod.
9 is given in Figure 10. SHowever, the observed effect depends on CaCl concentration up to 10 M and independent of it above that level withih the experimental error. -It should be mentioned 51 here that this level of addition at other pH values indicated that CaC1 2 causes adetrimental effect in the acidic and neutral pH ranges with no measurable change noticed in alkaline pH solutions [5J. a: ION IC S TRENGll-i 3_10"2 M (NaCL) N .... ) 0 :I: U) 0 ~ WAHR 0 ':' u0 .... z 15 2 ~ H ~ .. '"z C> 4 CaCL2 :I: U :!?
Advances in Fine Particles Processing: Proceedings of the International Symposium on Advances in Fine Particles Processing by D. A. Dahlstrom, W.-P. Kam (auth.), John Hanna, Yosry A. Attia (eds.)