Golden shifting process of biological oxidation-torrefaction-cyanidation
A bio-oxidation and roasting technology, applied in the direction of improving process efficiency, can solve problems such as inability to effectively recover gold, and achieve the effect of improving leaching rate and reducing pollution
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[0091] Example 1:
[0092] (1) Grinding and grading operations:
[0093] Grind the above-mentioned refractory gold concentrate to a particle size of -0.045mm and a content of 95%, and then carry out dense drug removal and adjust the pulp concentration to 16%;
[0094] (2) Biological oxidation operation:
[0095]The ore pulp with a concentration of 16% in step (1) was fed into the biological oxidation system, and the pH was guaranteed to be 1 to 2; the temperature was 40° C.; the amount of dissolved oxygen was 4 mg / l; Under the same process conditions, the biological oxidation operation is carried out. After the oxidation washing liquid is subjected to primary neutralization and secondary neutralization to remove arsenic, solid-liquid separation is carried out, and the neutralized residue is discharged. The neutralized liquid is returned to the washing system, and the oxidized residue is recycled. After pressure filtration, drying and pulverization, enter the next step of roa...
Example Embodiment
[0105] Example 2:
[0106] (1) Grinding and grading operations:
[0107] Grind the above-mentioned refractory gold concentrate to a particle size of -0.045mm and a content of 95%, and then carry out dense drug removal and adjust the pulp concentration to 18%;
[0108] (2) Biological oxidation operation:
[0109] The ore pulp with the ore pulp concentration of 18% in step (1) is fed into the biological oxidation system, and the temperature is 38° C.; the dissolved oxygen is 4 mg / 1; the medium consumption is 3 kg / t; Under the same process conditions, the biological oxidation operation is carried out. After the oxidation washing liquid is subjected to primary neutralization and secondary neutralization to remove arsenic, solid-liquid separation is carried out, and the neutralized residue is discharged. The neutralized liquid is returned to the washing system, and the oxidized residue is recycled. After pressure filtration, drying and pulverization, enter the next step of roasti...
Example Embodiment
[0119] Example 3:
[0120] (1) Grinding and grading operations:
[0121] Grind the above-mentioned refractory gold concentrate to a particle size of -0.045mm and a content of 95%, and then carry out dense drug removal and adjust the pulp concentration to 16%;
[0122] (2) Biological oxidation operation:
[0123] The ore pulp with a concentration of 16% in step (1) was fed into the biological oxidation system, and the pH was guaranteed to be 1 to 2; the temperature was 42° C.; the amount of dissolved oxygen was 5 mg / l; Under the same process conditions, the biological oxidation operation is carried out. After the oxidation washing liquid is subjected to primary neutralization and secondary neutralization to remove arsenic, solid-liquid separation is carried out, and the neutralized residue is discharged. The neutralized liquid is returned to the washing system, and the oxidized residue is recycled. After pressure filtration, drying and pulverization, enter the next step of ro...
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