新型压滤洗涤设备在电解金属锰制液过程的工程应用

Study on the Engineering Application of New Pressure Filtration Washing Equipment in the Electrolytic Manganese Liquation Process

新型压滤洗涤设备具备固液分离、原位分级加压循环洗涤、浸渣加气吹饼脱水及智能控制洗涤水消耗量等功能,可用于电解金属锰制液工序回收锰渣中可溶性锰和硫酸铵。采用新型压滤洗涤设备对电解金属锰渣进行了洗涤回收的工程应用研究,结果表明:洗涤1次总耗时72 min,洗涤前锰渣中可溶锰为2.29%,水洗锰渣中可溶锰为1.42%,通过1次洗涤,锰渣中可溶锰下降0.87%,可溶性锰洗涤回收率为37.85%,锰渣中硫酸铵洗涤回收率为55.96%;逆流洗涤2次总耗时为97 min,洗涤前锰渣中可溶性锰为1.97%,洗涤后锰渣中可溶性锰为0.85%,通过2次逆流洗涤,锰渣中可溶性锰下降1.12%,可溶性锰洗涤回收率为57.89%,锰渣中硫酸铵洗涤回收率为78.64%,洗涤回收效果显著。利用新型压滤设备洗涤回收锰渣中锰和硫酸铵,按锰渣质量30%的水量洗涤,每生产1 t电解金属锰,从锰渣中回收溶液的价值约443.49元,具有一定的经济效益。

The new type of pressure filtration washing equipment is equipped with functions such as solid-liquid separation,desludging,aeration,and cake blowing for dehydration,as well as intelligent control over washing water usage.It can be utilized for the recovery of soluble manganese and ammonium sulfate from manganese slag in the electrolytic manganese lixiviation process.An engineering application study was conducted on the washing and recovery of electrolytic manganese slag using this new type of equipment.The results indicated that the total time for a single wash was 72 minutes.The soluble manganese content in the manganese slag before washing was 2.29%,and after washing,it was reduced to 1.42%.Following a single wash,the soluble manganese content in the manganese slag decreased by 0.87%,with a soluble manganese washing recovery rate of 37.85%,and the ammonium sulfate recovery rate in the manganese slag was 55.96%.The total time for two countercurrent washes was 97 minutes.The soluble manganese content in the manganese slag before washing was 1.97%,and after washing,it was 0.85%.After two countercurrent washes,the soluble Mn content in the manganese slag decreased by 1.12%,the recovery rate of soluble manganese washing was 57.89%,and the recovery rate of ammonium sulfate in the manganese slag was 78.64%,demonstrating a significant washing recovery effect.Utilizing the new pressure filtration equipment for washing and recovering manganese and ammonium sulfate from manganese slag,with washing at 30%of the manganese slag’s weight,the value of the recovered solution from the manganese slag per ton of electrolytic manganese metal produced reaches 443.49 yuan,offering certain economic benefits.