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在由一个有效容积 5 0L的浸出槽和两个总容积为 2 1L的浸出槽组成的试验装置中 ,开展混合培养的新型嗜高温(78℃ )菌连续生物浸出黄铜矿的实验室试验。对以下操作条件进行了试验研究 :矿浆固体浓度、充气搅拌、氧气和二氧化碳的耗量、培养基的要求、浸出时间和pH调节。生物浸出工序的一般操作性比预期的要好。在矿浆固体浓度 12 %的条件下 ,连续浸出 5d的铜回收率超过 90 %。此外 ,对一些潜在的限制因素也进行了验证试验 ,限制因素包括细菌的敏感性、培养基浓度、氧的传递效率。该研究属于一个欧洲项目 (高温细菌氧化 ,注册商标为HIOX○R)的子课题 ,总课题的最终目标是提出经济上可行和环境友好的一种全新的铜回收工艺。
In a pilot plant consisting of a leachate tank with an effective volume of 50 liters and a leach tank with a total volume of 21 liters, a laboratory experiment of continuous bioleaching chalcopyrite at 78 ° C was conducted in a mixed culture. Experimental studies were conducted on the following operating conditions: slurry solids concentration, aeration agitation, oxygen and carbon dioxide consumption, media requirements, leaching time and pH adjustment. The general operability of the bioleaching process is better than expected. Under the condition of 12% slurry concentration, the recovery of copper leached continuously for 5d exceeded 90%. In addition, a number of potential constraints have also been validated, with limitations including bacterial sensitivity, media concentration, and oxygen delivery efficiency. This study belongs to a subproject of a European project (High Temperature Bacteria Oxidation, Registered Trademark HIOX ○ R). The ultimate goal of the overall project is to propose a new copper recovery process that is economically viable and environmentally friendly.