宁东矿区洗选精煤煤岩组分分离研究

为了探究按煤岩组分工业化分选宁东矿区不粘煤-弱粘煤的方法及其可行性。采用浮沉离心法并选取宁东矿区羊场湾煤矿配套洗煤厂的洗选精煤，按接近于煤岩各组分临界点的密度液借助离心分离法分离惰质组分。结果表明磨矿粒度越细越有利于接近惰质组密度的产物产率提高。分离产物的元素分析和挥发分关系与已知煤岩组分的关系相似但有差异。1.34g/cm～1.38g/cm和＞1.38g/cm密度级产物的FTIR谱图的特征吸收峰与惰质组特征相似。显微煤岩分析结果表明：按1.34g/cm和1.38g/cm密度级通过浮沉离心法分选出惰质组含量为32.23%和40.35%的产品及惰质组含量达到57.31%和63.9%的产物，实现了一定程度上分离脱除惰质组的目的。

Separation of maceral from cleaned coal in Ningdong Minefield

In order to explore the method and feasibility of industrial separation maceral of non-cohesive coal and weak cohesive coal in Ningdong Minefield. The floating-sinking centrifugal method was used to separate inertinite in maceral of cleaned coal from Yangchangwan Coal Mine Preparation Plant by centrifugal method with zinc chloride solution close to the density critical point of the various maceral types. The result show that the particle of grinding is more finer, the more favorable to increase the yield of the product close to the density of inertinite. The relationship of the elemental analysis and volatile matter between the known maceral and the separated product is similar but some different. The characteristic of FTIR spectra of 1.34g/cm3~1.38g/cm3 and >1.38g/cm3 density grade's products are similar to inertinite’ s. The results of maceral analyses show that the products with 32.23% and 40.35% inertinite, and its remainder with 57.31% and 63.9% inertinite are separated by floating-sinking centrifugal method according to zinc chloride solution of the density grade of 1.34g/cm3 and 1.38g/cm3. To a certain extent, the purpose of separating and removing inertinite in maceral is achieved.