Floatation recovery

Figure 10.11 presents the sehematic flowsheets of potential controlled flotation separation to recover chalcopyrite and pyrite from a copper-sulphur ore. Flowsheet I is collectorless flotation of chalcopyrite and then collector floatation of pyrite. Flowsheet II is collectorless flotation of chalcopyrite and then sodium sulphide-induced flotation of pyrite. Batch flotation results are illustrated in Table 10.5. It is evident that both flowsheets are suitable for flotation separation of copper-sulphur ore. The feed ore assayed 0.38% Cu and about 6% S, the copper concentrate obtained assayed 18%- 19% Cu with a recovery of 89%. For sulphur concentrate, the grade is 37%-43% S with a recovery of 82% - 85%. Interestingly, flie grade of sulphur concentrate is higher using sodium sulphide induced flotation than collector flotation. 

Froth floatation circuits for mineral processing Maximization of both the recovery of the concentrated ore and valuable mineral content in the concentrated ore. NSGA-II with modified Jumping Gene operator Equality constraint was imposed on total floatation cell volume. Guria et al. (2005a)... 

Four problems (a) maximization of recovery of the concentrate stream and the number of nonlinking streams in the circuit (N ), (b) maximization of profit and N, (c) maximization of recovery of valuable mineral in the concentrate stream and N, and (d) maximization of solids hold-up and N. Four problems were considered. One aim of the smdy was to simplify floatation circuits. Guria et al. (2005b)... 

Further recovery of magnesite from HMS floats can be achieved by the use of froth floatation. Since floatation beneficiation requires fine particles, the HMS floats are milled to a 100-mesh powder and first fed into the insolubles cell, where a major reduction of silicates occurs. The concentrates from the insolubles cells are then fed into the rougher cells where large reduction in dolomite, calcite, and chlorite occurs. From the rougher cells, the concentrates enter into the cleaner cells where dolomite is again reduced along with plagioclase. The recleaner cells remove dolomite from... 

A recovery program was begun in England in the early 1960 s [78]. Extensive research on the recovery of uranium in seawater has been conducted to replace uranium locally deposited as terrestrial ore with uranium uniformly dissolved in seawater. Many methods of recovery have been suggested coprecipitation, adsorption, ion floatation, and solvent extraction. Adsorption using solid adsorbents is promising with regard to economic and environmental impacts. 

HF (hydrofluoric acid) Liquid 230-1800 Undiluted Depressing mica, improving the floatation of feldspar when using cationic collector, improving the recovery of beryl, ilmenite, and chromite... 

H2S (hydrogen sulfide) Gas 90-900 Gas Improving the recovery of sulfide ore and precipitating heavy metal ion depressing FeS, CuS in the separation of Cu-Co ore Depressing Au, Ag, sulfide ores and chltnide Activating lead carbonate and copper earbonate improving the floatation of CoO and VO... 

CUSO4 Granularity 90-2300 Dry or saturated solution Activating ZnS, improving the floatation of FeSAs, smaltite, FeS, and 80283 Improving the recovery of fine-grained Au ... 

Ferrous sulfate and ferric sulfate Granularity 45-900 10 % solution Depressing sulfide ores Depressing the floatation of dissociated Au Activating quartz, increasing the recovery of PbS depressed by chromate improving the separation of nonmetallic ores ... 

Few of those who have to do with the industrially important subject of mineral recovery are aware that for many years a series of Australian chemists, starting with Wark and continuing with Nixon (who first applied the mixed potential concept), applied electrochemical ideas to mineral floatation. Ronald Woods article represents a culmination of many years of study and is far more advanced in what it tells the reader than any other document to date in this field. 

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