植物副产物浸出分离氧化型锰银矿的研究

介绍了利用植物副产物（秸秆、粮食加工副产壳类等）作为还原剂还原浸出氧化型锰银精矿中的锰、浸锰渣氰化浸银的锰银分离工艺。玉米秸秆还原浸锰条件：秸秆粉在95 ℃预降解糖化0.5 h、降解糖化液与精矿的体积质量比为3 mL/g、硫酸与锰的物质的量比为1.4、秸秆与精矿的质量比为0.275、95 ℃浸出5 h，在此条件下锰的浸出率约92%。浸锰渣氰化浸银条件：每吨浸锰渣氰化钠用量为3 kg、常温浸银3 h，在此条件下银的浸出率达到92.20%。研究的锰银分离工艺具有较好的综合效果。

Study on leaching separation of oxidized manganese-silver ore with plant by-product

The manganese-silver separation process，which uses plant by-product（straw and husk by-produced from grain processing etc.） as reducing agent for reduction leaching manganese in manganese-silver concentrate and for silver leaching from residue of manganese-leaching with cyanide was introduced.The conditions of corn straw reduction leaching manganese were as follows：straw powder pre-degradation and saccharification at 95 ℃ for 0.5 h，volume-mass ratio of degradation saccharification liquid to manganese-silver concentrate was 3 mL/g，amount of substance ratio-of-sulfuric acid to manganese was 1.4，mass ratio of straw to ore powder was 0.275，and leaching temperature and time were 95 ℃ and 5 h，respectively.The manganese leaching rate was about 92% under those conditions.Ag leaching rate of 92.20% could be achieved under the conditions when the dosage of NaCN was 3 kg per ton of the residue of manganese-leaching and the leaching temperature and time were room temperature and 3 h，respectively.The separation technology of manganese and silver had a very good comprehensive effect.