某选矿厂工艺流程现状分析及优化工艺研究

Analysis of A Concentrator's Existing Technological Process and Investigation on Its Optimization

某选矿厂处理矿石为贫磁铁矿矿石,由于入选原矿性质的变化,该选矿厂将单一磁选流程改造为磁选-重选联合流程,改造后生产指标得到了改善,但生产不稳定,精矿产量没有达到预定目标。通过对某选矿厂生产现状和流程考查结果的研究,分析了该厂生产中影响生产指标和流程稳定运行的主要因素,找到了现有生产工艺流程结构和各作业中存在的关键问题,并提出了采用阶段磨矿、粗细分选、磁选-重选联合工艺流程对现有流程进行优化。

A concentrator treats a lean magnetite ore and it has changed its original single magnetic separation process into a magnetic-gravity combined separation flowsheet due to the property change of the mill feed. The transformation has improved the production＇s metallurgical performances but the production is not stable and the concentrate has failed to attain the predetermined index. Through the investigation of the existing production and flowsheet and the analysis of the main factors influencing the production indexes and flowsheet stability, the key problems existing in the production flowsheet and each operation have been found and an optimization flowsheet consisting of staged grinding, coarse-fine separate treatment and magnetic-gravity combined separation is proposed.