辛置选煤厂浮选精煤掺粗工艺改造

针对辛置选煤厂二车间入选原煤中高灰细泥含量高、浮选精煤脱水设备运行周期长、煤泥水系统负荷大等问题,通过分析浮选入料性质进行浮选精煤掺粗工艺改造,并对改造效果进行分析。由于浮选精矿浓度偏低(255 g/L)、<0.125 mm粒度级含量偏低(占24%)、<0.045 mm粒度级含量较高(占46%),需在浮选精矿中适当掺入低灰细精煤物料,保证浮选精矿浓度、粒度均达标。将浮选精矿浓度控制在280 g/L以上,<0.045 mm粒级控制在40%以下。增加管路及阀门,将1组精煤磁尾旋流器底流物料掺入浮选精矿中,确保浮选精矿浓度、粒度达到最佳要求。每月浮选精煤增加效益43.20万元;介耗降低增加7.56万元,合计创效50.76万元,年可增创效609.12万元。 Aiming at the problem of high ash and fine mud content,long operation cycle of dehydrating equipment and heavy load of coal mud water system in two workshop of coal preparation plant,roughing process modification of clean coal was conducted,and transformation effect was analysed.Because the concentration of flotation concentrate is low( 255 g/L),the grain level of below 0.125 mm is low( 24%)and the grain level of above 0.045 mm is higher( 46%),the low ash fine coal material should be properly added into the flotation concentrate to ensure that the concentration of flotation concentrate and the size of the flotation concentrate reach the standard.The concentration of flotation concentrate is controlled above 280 g/L,and the particle size below 0.045 mm is below 40%.Increase the pipeline and valve,mix the bottom flow material of the one sets of clean coal magnetic tail swirler into the flotation concentrate to ensure that the concentration and granularity of the flotation concentrate meet the best requirements.The monthly flotation concentrate increases the benefit by 0.432 million yuan,and the medium consumption decreases by 75.6 thousand.The total effect is 0.507 6 million yuan,and the annual profit increases by 6.091 2 million yuan