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黄钾铁矾的生成对Sarcheshmeh生物堆浸硫化铜矿有不利影响。实验研究了在嗜酸氧化亚铁硫杆菌存在的情况下,生长介质中Fe(II)的初始浓度、pH及温度影响黄钾铁矾沉淀形成的机理。产生最多Fe(III)沉淀的条件为:硫酸亚铁浓度50 g/L、初始pH 2.2、温度32°C。Fe(III)沉淀的生成影响了对嗜酸氧化亚铁硫杆菌有重要作用的离子的浓度,比如:Fe3+、SO 2?4、K+、PO 3?4、Mg2+。对于Fe3+和K+,他们有相似的模式,这些离子共沉淀而形成黄钾铁矾的组分。在pH高于1.6时,由于PO 3?4与黄钾铁矾共沉淀以及嗜酸氧化亚铁硫杆菌较快的生长速度而导致合PO 3?4的化合物的溶解度急剧降低。在生物堆浸的初期,由于脉石的溶解,Mg2+浓度增大,随后缓慢降低。
The generation of jarosite has an adverse effect on the Sarcheshmeh biopile sulphide copper sulphide deposit. In the presence of Acidithiobacillus ferrooxidans, the initial concentration of Fe (II), pH and temperature in the growth medium were investigated experimentally to study the mechanism of the formation of jarosite precipitation. The conditions that produce the most Fe (III) precipitate are: ferrous sulfate concentration 50 g / L, initial pH 2.2, temperature 32 ° C. The formation of Fe (III) precipitate affects the concentration of ions that have an important effect on Thiobacillus ferrooxidans, such as Fe3 +, SO2? 4, K +, PO3? 4, Mg2 +. They have similar patterns for Fe3 + and K +, and these ions co-precipitate to form the components of jarosite. At pH higher than 1.6, the solubility of PO 3 -4 compounds drastically decreased due to the co-precipitation of PO 3 4 with jarosite and the faster growth rate of T. acidithiobacillus. At the beginning of bio-heap leaching, the Mg2 + concentration increased due to the dissolution of gangue and then slowly decreased.