高海拔矿区生物氧化槽内温度场研究

Analysis on Temperature Field in Biological Oxidation Tank of High Altitude Mining Area

高寒矿区生物氧化提金预处理工艺易受气候影响,氧化槽内温度分布不均衡会降低提金率。以高海拔矿区生物氧化槽为计算模型,通过理论推导、实测验证、CFD仿真等方法得到其三维温度场,通过改变换热管排布实现氧化槽内温度均衡分布。结果表明,气候条件对生物氧化槽内温度场分布有沿轴向和径向的影响,轴向影响突出,干扰生物氧化预处理进程。增设换热器能克服温度场不均衡问题,但需采取适当措施进行调整。

Pretreatment process of biological oxidation and gold extraction in alpine-cold mining area is susceptible to climate.Un-balanced temperature distribution in oxidation tank will reduce gold extraction rate.Three-dimensional temperature field is obtained by theoretical derivation,actual measurement and verification,and CFD simulation applying bio-oxidation tank of high-altitude mining area as calculation model.Heat exchange tube arrangement is changed to realize balanced temperature distribution in oxidation tank.The results show that climatic conditions have axial and radial influences on internal temperature field distribution of biological oxidation tank,and the axial influence is prominent,which interferes bio-oxidation pretreatment process.Addition of heat exchangers can overcome imbalance of temperature field,which should be adjusted by appropriate measures.