| 摘要 |
<p>PURPOSE:To treat efficiently gold- and silver-contg. silica ore and to recover efficiently gold and silver by adding a reducing agent and the gold- and silver- contg. silica ore to copper converter slag, maintaining the slag at an adequate temp., adding a CaO-contg. material thereto and maintaining the adequate CaO grade of the slag. CONSTITUTION:The copper converter slag is maintained at 1,200-1,300 deg.C by a method for blowing pulverized coal and air enriched with oxygen through a tuyere into the molten converter slag or other method to melt the gold- and silver-contg. silica ore and to absorb the gold and silver therein into the separated copper-component, by which the gold and silver are recovered and the refractory erosion of the converter is prevented in a method for treating the above- mentioned ore by adding the reducing agent and said ore into the copper converter slag, melting the slag and absorbing the gold and silver into the recovered copper-component. The CaO-contg. material is added to the slag and is melted to maintain the CaO grade of the slag at about >=3.0wt% and about 13% in the above-mentioned method, by which the slopping of the slag is prevented and the handling loss of the recovered gold and silver is decreased.</p> |
