梁北选煤厂降低介耗途径研究

通过对梁北选煤厂原煤性质分析可知,梁北选煤厂煤泥含量非常大,应选择预脱泥有压重介旋流器分选。针对梁北选煤厂介耗偏高的问题,从煤质变化、脱介系数、磁选机管理、分流量调节等方面进行了综合分析。通过提高脱泥效率、调整筛面布置、改变合介段筛板组合、加强喷水管理、调整磁选机结构、增加精矿脱磁器、控制跑冒滴漏和实行介耗精细化考核等途径,梁北选煤厂介耗由原先的2.46 kg/t降至0.65 kg/t,每年可节约成本208.5万元,达到了降低介耗,提高效益的目的。

Research on ways of reducing medium consumption in Liangbei coal preparation plant

The analysis of raw coal properties shows that coal slime content is so large that should be separated by pre-desliming dense medium cyclone. To reduce medium consumption, comprehensively analyze change of coal properties, efficiency of demedium, management of magnetic equipments, adjustment of bypass flow and the like. The medium consumption are reduced from 2.46 kg/t to 0. 65 kg/t, the cost also be reduced by 2. 085 million yuan annually,those better results are achieveed by improving efficiency of desliming, adjusting sifters arrangement and magnetic equipments structure, changing sifters combination in mixing medium process, strengthening water spray management, adding clean coal demagnetizer, controlling water leakage, conducting refined management. Those measures effectively reduce the medium consumption and improve the benefits.