哈尔滨某矿深锥浓密机的应用改造

摘要

Based on the debugging operation of paste backfill system in a copper-zinc mine in Harbin,reasons of clear water polluted by feeding slurry,low concentration underflow,and pressure rake during debugging operation were pointed out. Corresponding solutions including reformation of feedwell,flocculant dosing points and underflow circulating pipes etc. were in-troduced. It has been proved that:①It is beneficial for creating a suitable condition for stable and sufficient mixing of tailings and flocculant by choosing proper selection of the tailings dilution mode and decreasing the kinetic energy of slurry entering feedwell;②Increasing properly and arranging reasonably the flocculant dosing points can improve flocculation effect and under-flow concentration of deep cone thickener;③Reasonable design of the underflow circulating pipes allows for smooth flow of un-derflow,reduce running resistance of rake and decrease the accident of pressure rake.%以哈尔滨某铜锌矿膏体充填系统调试为背景，指出调试过程中出现深锥浓密机澄清溢流水受给矿污染、底流浓度偏低以及压耙等问题的原因，并介绍了针对这些问题进行给料井、絮凝剂投加点及底流循环管道等的改造情况。实践证明：①合理选择尾矿浆的稀释方式，科学、恰当消减尾矿浆进入给料井的动能，有利于为矿浆与絮凝剂平稳、充分混合营造理想的环境；②适当增加并合理布置絮凝剂投加点有利于改善絮凝效果，提高深锥浓密机的底流浓度；③科学、合理的浓密机底流循环管路设计有利于底流料浆的平稳流动，减少耙架的运行阻力和压耙事故的发生。