铜矿山残留硫化铜矿细菌浸出试验研究

本文阐述了开采完毕的矿坑中硫化铜矿的细菌浸出小型试验及模拟矿层结构的柱浸试验。其结果表明，残留疏化铜矿中铜矿物以黄铜矿为主，粒度为－０．０７４ｍｍ的矿石经７天细菌浸出，铜的浸出率可达２０％，加入一定量Ａｇ￣＋可使铜的浸出率提高至８０％～９０％，同时抑制了铁溶出。在模拟柱浸中，矿石粒度对铜的浸出有很大影响，粒度为２０～１００ｍｍ的矿石经１３４天的细菌浸出，铜浸出率可达到１０％左右。

STUDY ON BACTERIAL LEACHING OF COPPER SULPHIDE ORE FROM RESIDUAL PILLAR AT COPPER MINE

In this paper, the bench-scale and simulated column leaching experiments of copper sulphide ore in mined-out area with bacterial leaching are described. The test results showed that copper in residual copper sulphide ore was mainly in the form of chalcopyrite.It was ground to less than 0.074mm, and leached with bacteria for 7 days, the copper leaching recovery could be up to 20%. The copper leaching recovery could be raised to 80% ～ 90% by adding certain amount of Ag+, simultaneously the leaching of the iron was inhibited. In the simulated column leaching, the panicle size of the ore had a considerable effect on copper recovery. The copper recovery was about 10% after leaching for 134 days when the particle size was in the range of 20 ～100mm.