华恒选煤厂煤泥浮选的可行性研究

针对华恒选煤厂选煤方式单一、煤泥回收困难等问题,通过筛分试验、标准分步释放试验和煤泥浮选试验验证煤泥浮选的可行性。结果表明:煤泥中+0.5 mm产率较低,为0.18%,-0.25 mm产率为99.23%,符合煤泥浮选入料粒度要求;轻柴油和GF质量比9∶1,药剂用量为1000 g/t时,煤泥浮选效果最好,此时精煤产率为46.28%,精煤灰分为11.76%,可燃体回收率最高为73.99%,煤泥浮选可行。结合选煤厂实际情况分析了煤泥浮选的必要性,预测了增设煤泥浮选的经济效益,说明增设煤泥浮选系统在施工空间和工艺布置方面完全可行,增设煤泥浮选系统可优化选煤工艺,适应市场变化。浮选精煤可与精煤掺配销售,保持精煤水分稳定,减少因水分损失带来的亏吨现象,减少煤泥积压,缓解企业压力,增加销售收入1530.9万元/a。

Feasibility study on flotation in Huaheng coal preparation plant

To resolve the problems such as single coal separation method and low slime recovery in Huaheng coal preparation plant,test the flotability through screen analysis,standard substep release test and flotation test.The results indicate that the proportion of＋0.5 mm parti-cles in the slime is only 0.18%,which is suitable for the flotation conditions,the content of-0.25 mm particles is 99.23%,which meets the requirement of particle size in the flotation.The optimized reagent schedule is that the ratio of light diesel and GF is 9 ∶ 1,the dosage of mixed reagents is 1000 g/t,while the productive rate of the clean coal is 46.28%,the clean coal ash is 11.76%,the recovery of combusti-ble materials is 73.99%.So the flotation is suitable for the separation of the slime.According to the practical situations of the coal prepara-tion plant,the necessity of the slime flotation is analyzed,and the economic benefits has been estimated,the program of slime flotation sys-tem is feasible in the construction space and processing layout.The blend of clean coal of the slime flotation and the washing clean coal can hold the moisture of clean coal, decrease the overstock of coal slime, relieve the operating pressure and increase the sales revenue by 1. 5309＆#215;107 yuan per year.