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Example of resin in pulp - treatment of flotation gold conce

2020-10-28 12:11

Introduction：Example of resin in pulp- treatment of flotation gold concentrate Flotation gold concentrate contains collector, foaming agent, high gold content, and sometimes a certain amount of mercury.In order to improve the capacity of gold adsorptio

Example of resin in pulp - treatment of flotation gold concentrate

Flotation gold concentrate contains collector, foaming agent, high gold content, and sometimes a certain amount of mercury.In order to improve the capacity of gold adsorption by the resin and facilitate operation, the flotation agent in the concentrate was removed by concentrated washing after regrinding.The adsorption capacity of mercury is equal to that of gold, and it is easy to be desorbed by thiourea.Therefore, the presence of mercury not only reduces the adsorption rate of gold, but also produces mercury vapor and hydrogen cyanide gas in the process of cyanidation and adsorption, which pollutes the environment. It is necessary to operate in the sealing equipment and increase the purification process.Therefore, every effort should be made to clear the mercury in the slurry before cyanidation.In order to recover the high concentration of gold in the slurry, the resin concentration should be 1.5 ~ 2 times higher than that of the original ore cyanide slurry.
China used 717, 704 resins to extract gold from cyanide slurry of flotation gold concentrate.The test process of gold extraction from gold concentrate with 717 resins is shown in FIG. 5-47.The particle size of gold sulfide concentrate floatated was 5 ~ 45 microns, and then ground 100%-0.038 mm, the liquid to solid ratio of cyanide is 4:1.Type 717 resin was added to the ratio of 20kg/ton, and the resin contained 1.3 mg/g of gold, and the adsorption rate of gold was 98.52%.In 0.2mol NaOH+2 mol NaCNS desorption solution, lead plate cathode and graphite anode were used and the trough voltage was 2.6-3.2v and the current density was 171am/m2. The desorption rate of gold was 99.4%. The desorption rate of gold was 0.008 mg/g, the flotation concentrate contains 31.33 grams of gold per ton, and the total recovery rate of gold is 93.25%.
With 704 styrene type weak basic anion resin extracting gold from gold sulfur concentrate cyanide pulp of expanding test showed that the grinding fineness 97.5% -200 mesh, ore slurry liquid to solid ratio 2:1, free NaCN concentration 0.08% ~ 0.1%, the concentration of calcium oxide cyanide adsorption under the condition of 0.045% and pH = 9.5 Cyanide adsorption 6 hours, the gold leaching rate was 97.74%, the adsorption rate was 97.32%.The adsorption amount of dry resin (mg/g) is: gold 24.27, silver 0.815, copper 2.07, iron 6.10, zinc 0.825, nickel 0.325.
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