中煤泥破碎解离特性与再选试验研究

发布时间：2018-03-08 02:12

本文选题：炼焦中煤　切入点：中煤泥破碎　出处：《煤炭科学技术》2017年02期 　论文类型：期刊论文

【摘要】：为充分回收炼焦中煤中的精煤,以重选中煤沉降离心机产品作为解离再选试验对象,通过筛分、破碎、浮沉、分步释放浮选试验研究了其再选可能性,并用偏光显微镜观察了破碎前后煤中矿物质的嵌布状态。试验结果表明:该煤样最佳的破碎粒度为0.3 mm,此时,煤样中的有机质与黄铁矿及石英得到有效解离,但有机质与黏土矿物并没有得到明显解离,该连生体易在浮选过程中造成浮选精煤灰分偏高。小浮沉试验表明,当精煤灰分为11.00%时,其理论精煤产率为50.00%。一粗一精浮选试验表明,当柴油用量为1 kg/t,仲辛醇用量为0.1 kg/t时,经一粗一精浮选后可以得到灰分为10.57%,产率为46.47%的精煤产品。
[Abstract]:In order to fully recover the fine coal from coking coal, the possibility of separation and reconcentration was studied by means of screening, crushing, floatation, and step by step release flotation test with the centrifuge product of gravity separation medium coal as the test object of dissociation and reconcentration. The distribution of minerals in coal before and after crushing was observed by polarizing microscope. The experimental results showed that the optimum particle size of the coal sample was 0.3 mm, and the organic matter of coal sample was effectively dissociated from pyrite and quartz. However, the organic matter and clay minerals have not been dissociated obviously, and the probiotic is easy to cause high ash content in flotation process. The small floatation test shows that when the concentrate ash is divided into 11.00 parts, The experimental results show that when the amount of diesel oil is 1 kg / t and the amount of secondary octanol is 0. 1 kg/t, the ash can be divided into 10. 57% and 46.47%% fine coal after one coarse and one fine flotation.
【作者单位】：中国矿业大学(北京)化学与环境工程学院;
【基金】：国家自然科学基金青年科学基金资助项目(51604280)
【分类号】：TD94

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