Metho of recovering valuable metal in gold silver smelting furance waste lining brick
A technology of valuable metals and smelting furnaces, applied in the field of recycling various valuable metals, can solve problems such as difficult purification, long time required for carbonate conversion, complicated process, etc., and achieve the effect of reducing pollution
Inactive Publication Date: 2007-04-18
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY +1
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A method to recover valuable metal from abandoned bricks by lines of gold and silver smelting, whose craft steps are as follows: de-magging from extraction of sulfuric acid, deprivation of lead sulfate etching by alkali, silver etching by nitric acid and gold etching by aqua regia. The process of de-magging from extraction of sulfuric acid is that: 200kg bricks powder of abandoned magnesia-chrome from lines of gold and silver smelting is stirred with 1350kg dilute sulfuric acid. The mixture reacts for 2 to 3 hours, and discharges clear MgSO4 strong solution. 100kg water is filled into extraction slot. Based on stirring, 25ppm flocculant is added and stewed for 10 minutes. After discharging MgSO4 solution, 1000kg is filled into extraction slot and filtrated to get MgSO4 wet materials. Then, it is neutralized with light-burned magnesia to achieve magnesium sulphate. Valuable metals including magnesium, lead, silver, gold and copper etc. can be recovered from abandoned bricks by lines of gold and silver smelting. Deposits including Cr(OH)3, Fe(OH)3, Cu(OH)2 and Al(OH)3 can be gathered for producing refractory materials, which realizes salvaging and reduces environmental pollution.
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