黄铁矿烧渣微生物脱硫

Bio-desulphurization from Pyrite Slag with Thiobacillus Ferrooxidans

在烧渣生物脱硫的试验．论研究了矿浆浓度、Ｆｅ３＋浓度及ｐＨ值对游离Ｔ．ｆ菌浓度和脱硫率的影响．证明烧渣脱硫是Ｔ．ｆ．菌直接浸出作用和由细菌而产生的Ｆｅ３＋间接浸出作用的联合；脱硫速率和菌种氧化活性受到吸附在固相上和液相中细菌生长情况、矿浆浓度、ｐＨ值和Ｆｅ３＋的影响；三价铁离子的添加可影响菌种活性，抑制浸出的进行，且易在矿物表面产生沉淀，降低氧化率．烧渣生物脱硫后，可达到铁精矿标准．

The bio-desulphurization experiments on slag were carried out. The results show that pulp density, Fe3+ concentration and pH are effect on Thiobacillus ferrooxidans(T.f.) consistency free in the solution and desulphurization rate. The bio-desulphurization from slag is due to the combination of the direct bacterial action on the mineral surface with the indirect leaching by the ferric ion produced by the bacteria into the sol- ution. Desulphurization rate and oxidative activity of the T.f. are influenced by the growth of T.f adhered to the mineral , mineral density, Fe3+ concentration and pH consistency. The addition of ferric ion can interfere in the bacteria oxidative activity and result in inhibiting effect on the desulphurization, some sediment on the sur- face of the mineral are formed to reduce desulphurization rate.