某高纬度寒冷地区低品位铜矿资源综合利用试验研究

Experimental study on the comprehensive utilization of low-grade copper ore resources in a high-latitude cold region

某高纬度寒冷地区低品位铜矿由原生硫化铜矿、次生硫化铜矿和氧化铜矿组成,且矿石性质随矿体深度逐渐变化。在自然温度、中温或酸性条件下,原生硫化铜矿中砷黝铜矿及黝铜矿、次生硫化铜矿及氧化铜矿易于浸出。针对浅部低品位铜矿,在温度13℃~23℃条件下对其进行常温硫酸柱浸34 d,而后在加入浸矿菌、温度-23℃~30℃条件下进行中温生物氧化柱浸试验,铜浸出率可达65.01%。在矿石粒度-50 mm,柱浸时间288 d条件下,对中深部低品位铜矿进行扩大试验,铜浸出率达41.66%。

The low-grade copper ore in a high-latitude cold region consists of primary copper sulfide ore,secondary copper sulfide ore,and copper oxide ore.The ore properties gradually change with the depth of the ore body.Under natural temperature,medium temperature,or acidic conditions,tennantite and tetrahedrite in the primary copper sulfide ore,secondary copper sulfide ore,and combined copper oxide ore are easily leached.For shallow low-grade copper ore,sulfuric acid column leaching in atmospheric temperature was conducted at temperatures of 13℃-23℃ for 34 d,followed by medium-temperature bio-oxidation column leaching with leaching bacteria added at temperatures of -23℃-30℃,achieving a copper leaching rate of 65.01%.For medium-deep low-grade copper ore,a pilot test was conducted under conditions of ore particle size-50 mm and a column leaching time of 288 d,achieving a copper leaching rate of 41.66%.