炼焦中煤磨矿浮选试验研究

Experimental study on the coarse-grinding and flotation of the coking middlings

摘要: 以屯兰矿选煤厂-3mm粒级重介质分选中煤为试验煤样，采用MiniFlex600 X射线粉末衍射仪和OLYMPUS BX51显微镜研究了煤样的矿物组成与嵌布特征，并对磨矿后的产品进行了浮选试验。结果表明：-0.074mm 粒级含量为67.32%时，在捕收剂用量200g/t和起泡剂用量50g/t的条件下，通过一粗一精浮选可回收产率为34.75%，灰分为11.64%的合格精煤。

Abstract: The heavy medium coking middlings of -3mm size from TunLan Coal Preparation Plant were taken as the study sample. The MiniFlex600 X-ray powder diffractometer and the OLYMPUS BX51 microscope were applied to analyze the phase composition and the mineral dissemination features of the coal samples respectively. Besides, the flotation tests of grinding products were conducted. Results show that when the content of -0.074mm size is 67.32%, with one roughing and one cleaning floatation process, clean coal with the ash content of 11.64% and the yield of 34.75% could be recycled under the condition of collector dosage of 200g/t and frother dosage of 50g/t.