钼精矿热压碱浸—离子交换提取钼试验研究

Recovery of Molybdenum from a Molybdenum Ore Concentrates by High-pressure Oxygen Digestion&Ion-exchange

针对某非标准钼精矿采用碱性介质氧压煮-离子交换回收钼试验研究，主要进行了钼精矿碱用量、氧分压和浸出温度及树脂交换pH值和温度以及钼酸铵制备试验研究，研究结果表明：钼精矿在NaOH过量系数为1.12，液固比为7，温度150℃，氧分压0.5MPa，总压保持0.9-1.2MPa，保温保压反应4h，钼的浸出率可达98％以上，浸出液酸化后用离子交换可获得99％的回收率，解吸液采用制备钼酸铵经典除杂工艺除杂后制备出优质钼酸铵产品，该工艺可为同类非标钼精矿提供一条有效的回收工艺。

The recovery of molybdenum from a non-standard molybdenum concentrate by alkaline medium oxygen pressure cooking was studied in the paper. Experimental research on alkali dosage of molybdenum concentrate, partial pressure of oxygen, leaching temperature, pH value and temperature of resin exchange and preparation of ammonium molybdate was carried on. The research results show that when the coefficient of NaOH is 1.12, the ratio of liquid to solid is 7, the temperature is 150℃, the oxygen partial pressure is 0.5 MPa, the total pressure is 0.9-1.2MPa and the temperature for reaction is 4h, the leaching rate of molybdenum is more than 98% and the recovery is more than 99% after acidification of the leaching solution by ion exchange. Ammonium molybdate was produced by the classic purifying technology used by the preparation of ammonium,which provides an effective recovery technology for the similar non-standard molybdenum concentrate.