营养物对氧化亚铁硫杆菌浸出含镍磁黄铁矿的影响

EFFECT OF NUTRIENT ON THE BIOLEACHING OF NICKEL-BEARING PYRRHOTITE BY THIOBACILLUS FERROOXIDANS

研究了 Ｆｅ２＋、 ＮＨ４＋和葡萄糖对氧化亚铁硫杆菌（Ｔ．ｆｓ）浸出合镍磁黄铁矿的影响，实验结果表明，加入适量的 Ｆｅ２＋或ＮＨ４＋能明显提高镍、铜和钴的浸出率；一定量的葡萄糖会抑制镍和钻的浸出，而促进镁的浸出，但对铜的浸出无明显影响。分析实验结果指出，镍的浸出是细菌与矿物的直接作用和 Ｆｅ３＋与矿物的间接作用两者的结果， Ｆｅ３＋对铜的浸出无明显影响，而镁的浸出则与浸出液的酸度有关。

The effect of Fe2+, NH4+ and glucose on the leaching of nickel-bearing pyrrhotite by Thiobacillus ferrooxidans (T.fs) was investigated. Fe2+, NH4+ amendment obviously enhanced the leaching of Ni, Cu and Co. Certain concentration of glucose in the medium inhabited the dissolution of Ni and Co, increased the leaching of Mg and did not obviously affect the leaching of Cu. Ni was leached from nickel-bearing pyrrhotite by both direct reaction of bacteria with minerals and indirect reaction of Fe3+ with minerals,...