Download Advances in Fine Particles Processing: Proceedings of the by D. A. Dahlstrom, W.-P. Kam (auth.), John Hanna, Yosry A. PDF

By D. A. Dahlstrom, W.-P. Kam (auth.), John Hanna, Yosry A. Attia (eds.)

Processing of good debris has provided a number of demanding situations to scientists and engineers for a few years. significant development has al prepared been made in assembly those demanding situations throughout quite a few fields of purposes worldwide. study on each point of good particle processing has won momentum lately, leading to the advance of recent approaches, more desirable items, and higher realizing of the technology and engineering basics of excellent debris. This symposium addressed the new development in positive debris processing, quite within the construction of minerals for chemical compounds, pigments and steel creation, ceramic fabrics, and fossil fuels. This publication represents the edited court cases of the foreign Symposium on Advances in tremendous debris Processing, the place chosen peer-reviewed papers describe present practices, overview the cutting-edge and file unique basic 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 through multi-chemical, actual and organic phenomena has additionally been addressed. for that reason, the publication comprises seven components, with every one half addressing a selected subject. half One bargains with creation of excellent debris through comminu­ tion tools the place assorted milling practices, mathematic modeling and actual­ chemical regulate tools are suggested. half covers particle move homes in a number of fluids. half 3 addresses floor and colloidal phenomena in high quality particle processing, whereas half 4 keeps this subject yet with emphasis on clay minerals.

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11 (1972), pp. 321-331. 55 2. H. El-Shall, S. Vindage, and P. Somasundaran, "Grinding of Quartz in Amine Solutions, lnt. J. Mineral Proe. 6, (1979) pp. 105-117. 3. H. El-Shall, A. Gorken, and P. Somasundaran, "Effeet of Chemieal Additives on Grinding of lron Ore Minerals," Proe. of the XlIInt. Min. Proe. Congr. Warsaw (1974) V. 2, Part A, pp. 695-726. 4. H. El-Shall, A. Gorken, and P. , Thesis, Columbia University, New York, NY (1980) p. 288. 5. P. Somasundaran, and H. G. , AlME, (1983) pp. 21-35.

9 99 0 0' ........ 90 Moisture 0. 4 matter Fixe d earbon 37 . 6 44. 1 38 . 6 15 . J::. J 50100 X (IJ,m) FIG. 1 8 16 .. • .. treoate-d with NH3 C::. 5001000 Rosin-Rarnrnler diagram of eumu lative size distribution of Miike eoal ground with alumina balls 59 RESULT AND DISCUSSION Particle Size Distribution of Ground Products The cumulative distribution of ground products under the particle size, x, is defined by (X J Q(x,t) o (1) (aQ/dx)dx (2) Figure 1 and 2 show the Rosin-Rammler diagrams of Miike coal ground with alumina and steel balls, respectively.

47 ALCL 3 CONC. 100 • 0 0 10- 7 !!! 10 - 5 !!! e:. :z: Q C> :::; 0 '"........ 60 .... z 0~ 20 4 2 6 pH Figure 5. Effect of A1C1 3 Additions on the Turbidity of qu~rtz Slimes ln 10-4~ FeC13 Solutions as a Function of pH. o - 20 ....... Q. ~-40 - 60 - 80 QUARTZ SLI MES IN 10-41!! (N~3 AND : • DISTILL EO WATER e:. 10- S!!!! DDACL o 10- 3 !!! OOACL 2 4 6 8 10 12 pH Figure 6. Effect of Dodecylammonium ~l]loride on Zeta Potential of Quartz in 10- ~ Fe (N0 3 )3 Solution. 48 The given results show a de~5ease in the negative value of zeta potential in presence of 10 mole/liter (DDACI), and a ~3versal of sign of zeta potential due to addition of higher levels of 10 mole/liter of amine.

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