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1 前言在含砷矿石的选别过程中已确认了采用生物浸出法从难浸硫化矿精矿中回收金是能获得效益的。在固体浓度为15～20%的条件下将浮选精矿通过一系列的生物反应槽,以促进硫化物的溶解。在进行氰化浸出以回金之前,细菌浸出的矿浆需要中和处理,而且精矿的固体含量最好保持30～40%。水力旋流器为矿浆脱水提供了成熟的技术。它可处理大流量,而且设备既简单又坚实。此外,这种设备还有可能同时进行固-液的选择性分离。已采用水力旋流器技术进行过细菌浸出矿浆的固液分离研究。这种研究可更好地对给到氰化物浸出的固体精矿进行控制。本研究的主要目的是对细菌浸出的矿浆悬浮液进行选择性分离。通过固体的选择性分离提高细菌的活度,而且可对生物浸出过程中活性细菌再循环的可能性进行评价。此外,还可
1 INTRODUCTION It has been confirmed in the process of sorting arsenic-bearing ores that the bio-leaching method can be used to recover gold from refractory sulfide ores. The flotation concentrate is passed through a series of biological reaction tanks at a solids concentration of 15-20% to promote sulfide dissolution. Bacterial leaching slurry needs neutralization prior to cyanidation leaching to recover gold, and the solids content of the concentrate is preferably maintained at 30-40%. Hydrocyclones provide a mature technology for slurry dehydration. It handles heavy traffic and the equipment is simple and solid. In addition, it is also possible for this device to simultaneously carry out a selective solid-liquid separation. The hydrocyclone technology has been used to study the solid-liquid separation of bacterial leaching slurry. This research provides better control of solid concentrates leached into cyanide. The main purpose of this study was to selectively separate bacterial leaching pulp slurries. The bacterial activity is enhanced by the selective isolation of solids, and the possibility of recirculation of active bacteria during bioleaching can be assessed. In addition, you can