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本文描述了布伦瑞克矿(Brun swick Min.)复杂硫化矿多段磨矿流程的模型研制和仿真。现有的磨矿流程由一台棒磨机和二台并联的球磨机组成,球磨机和两台串联的旋流器构成闭路。利用长期取样得到的现厂数据来建立流程中单元作业的模型,然后把单元作业模型用于稳态计算机模拟器,以研究把磨矿细度从现在的63％增加到68％-38微米的不同流程方案。一般说来,计算机仿真能够产生由下面四种基本作业(即矿浆流结点、球磨机、旋流器和筛子)所组成的任何流程。在所研究的几种流程中,没有一种能够使最终磨矿细度发生明显的变化。采用串联磨矿(Series grinding)可为进一步的最优化提供最佳方案,虽然模拟器是十分有效的,但所观察到的最终磨矿细度几乎没有任何变化。可是,在检查串联配置时,发现有一个碎裂选择函数(reduce slection function),对此尚不能作直接的解释。初步的选别结果表明,锌回收率的增加和串联磨矿流程的改变是同时发生的。但还不能证明回收率的增加是流程改变的结果.
This paper describes the development and simulation of a multi-stage grinding process for a complex sulphide ore at the Brun swick mine. The existing grinding process consists of a rod mill and two ball mills in parallel. The ball mill and two tandem cyclones form a closed circuit. Using the factory data obtained from long-term sampling, a model of unit operation in the process was established and the unit operation model was then used in a steady-state computer simulator to study the effect of increasing the grinding fineness from the current 63% to 68% -38 μm Different process plan. In general, computer simulations can generate any flow consisting of the following four basic jobs (ie, pulp flow junctions, ball mills, cyclones and screens). Of the several processes studied, none of them led to a significant change in final mill size. Using Series grinding provides the best solution for further optimization. Although the simulator is very effective, there is almost no change in the final grinding fineness observed. However, there is a reduced slection function found when examining the cascaded configuration, which can not be directly explained. The preliminary sorting results show that the increase of zinc recovery and the change of tandem grinding process occur simultaneously. However, it can not be proved that the increase of recovery rate is the result of process change.