| 发明名称 |
METHOD FOR RECOVERING GOLD FROM REFRACTORY ORE |
| 摘要 |
A method of recovering gold from refractory ore containing a carbonaceous material, a sulfide and gold is provided. Gypsum seed crystals are added to a slurry containing a roasted refractory ore or a pressure-oxidized refractory ore to decrease gypsum encapsulation of gold and improve gold recovery. |
| 申请公布号 |
US2016083816(A1) |
申请公布日期 |
2016.03.24 |
| 申请号 |
US201514856277 |
申请日期 |
2015.09.16 |
| 申请人 |
Ecolab USA Inc. |
发明人 |
Davis Ronald V.;Child Daniel E.;Gerlach Walter |
| 分类号 |
C22B3/20;C22B1/26;C22B11/08;C22B1/02;C22B11/02;C22B3/00 |
主分类号 |
C22B3/20 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method of recovering gold from refractory ore comprising:
heating refractory ore containing a sulfide and gold to form a hot ore; quenching the hot ore with an aqueous liquid containing a sulfate and calcium to form a hot liquid slurry; adjusting the pH of the hot liquid slurry to form a basic slurry; adding cyanide to the basic slurry to extract gold as a concentrated solution; and recovering the gold from the concentrated solution, the improvement comprising: adding gypsum seed crystals after the heating step and before the cyanide addition step in an amount sufficient to decrease gypsum encapsulation of gold. |
| 地址 |
St. Paul MN US |
