浮选精煤加压过滤机滤液处理方法研究

选煤厂浮选精煤加压过滤机滤液返回浮选使浮选系统煤泥水量增大,增大了浮选压力,而且大量细泥在浮选系统循环,恶化了浮选系统的分选效果。为合理处理滤液,改进煤泥水系统,提出了"浮选柱+快开压滤机"独立回收滤液的工艺,通过试验验证了该工艺的可行性。结果表明:加压过滤机滤液单独处理,既得到了不背灰的合格精煤,又大大减少了浮选系统煤泥水量,有效缓解浮选压力,改善浮选效果,提高精煤回收率。

Study on the disposal method of filtrate of flotation concentrate produced by pressure filter

The conventional process of sending filter liquor of pressure filter back to flotation system brought about some problems to the flotation system: the flotation system is under greater pressure when flotation feed quantity increase; flotation effect is worse with the vicious circle of fine slime in flotation system. To recover clean coal in filter liquor and improve coal slurry treating process, a new “flotation column + quick-operating pressure filter” filter liquor independent recovery process is put out. Feasibility of this process is proved through experiments, according to the results, implementation of this process can get qualified clean coal , reduce flotation feed quantity greatly and relieve flotation pressure, improve flotation effect and increase clean coal recovery.