Process for treating medium-term slag of silver separation furnace by utilizing copper removal furnace

The invention discloses a process for treating medium-term slag of a silver separating furnace by using a decoppering furnace, which comprises the following steps: crushing the medium-term slag of the silver separating furnace, adding the crushed medium-term slag into a hopper, adding a proper amount of sodium carbonate, pulverized coal and sulfur concentrate, pouring into the decoppering furnace, and carrying out high-temperature reaction to produce crude bismuth; and after melting in a refining pot, blowing, adding caustic soda flakes and sulfur for treatment, thereby obtaining the bismuth alloy. Compared with the prior art, the method has the beneficial effects that the treatment process of the medium-term slag is shortened, the smelting production efficiency is improved, the production cost is reduced, and a brand-new way is opened up for the trend of the medium-term slag of the silver separating furnace. 本发明公开了一种利用脱铜炉处理分银炉中期渣的工艺，该工艺将分银炉中期渣进行破碎处理后，加入料斗内，配入适量的纯碱、粉煤、硫精矿，倒入脱铜炉中，经高温反应后，产出粗铋；将其投入精炼锅熔化后，吹风、加片碱及