炼焦中煤解离再选试验研究

发布时间：2018-06-15 23:17

本文选题：炼焦煤 + 重介中煤　；参考：《煤炭科学技术》2016年10期

【摘要】：为充分回收稀缺的炼焦煤资源,对钱家营选煤厂重介块中煤进行解离再选试验研究,对破碎后产品中的1~0.25 mm粒级进行了干扰床分选机(TBS)分选预测,-0.25 mm细粒级进行了柱浮选优化试验及精选试验。结果表明,当要求精煤灰分为12%时,1~0.25 mm粒级物料经TBS分选可获得产率25.11%的精煤产品,-0.25 mm细粒级物料经传统浮选机一次浮选无法得到合格的精煤产品。通过对细粒级浮选精煤进行筛分试验,发现-0.045 mm粒级的夹带可能是精煤灰分超标的主要原因。SEM扫描结果及能谱分析表明,部分高岭石通过夹带进入了精煤产品,对精煤造成污染。为降低细粒精煤灰分,对-0.25 mm细粒级物料进行了高泡沫层浮选柱及精选试验,结果表明,浮选柱高泡沫层降低夹带的程度有限,而精选作业能够获得灰分11.91%、产率24.14%的合格精煤产品。
[Abstract]:In order to fully recover the scarce coking coal resources, the experimental study on dissociation and reconcentration of coal in heavy medium block of Qianjiaying Coal preparation Plant was carried out. In this paper, the optimum column flotation test and cleaning test were carried out for 1o 0.25 mm particle grade of broken product by interference bed separator (TBS) separation prediction. The column flotation optimization test and cleaning test were carried out. The results show that when the clean coal ash is required to be divided into 12 parts, a fine coal product with a yield of 25.11% can be obtained by TBS separation, and the qualified fine coal product can not be obtained by one floatation with traditional flotation machine. Through screening test of fine flotation fine coal, it is found that the entrainment of -0.045 mm particle size may be the main reason for the ash content exceeding the standard. SEM scanning results and energy spectrum analysis show that some kaolinite has entered the product of clean coal through entrainment. Pollute clean coal. In order to reduce ash content of fine coal, the flotation column with high foam layer and its cleaning test were carried out on -0.25 mm fine grained material. The results showed that the degree of reduction of entrainment in high foam layer of flotation column was limited. And the cleaning operation can obtain ash 11.91%, yield 24.14% of qualified coal products.
【作者单位】：中国矿业大学化工学院;中国矿业大学国家煤加工与洁净化工程技术研究中心;
【基金】：贵州省“125计划”重大科技专项资助项目(黔教合重大专项字[2013]026号) “十二五”国家科技支撑计划资助项目(2014BAB01B03)
【分类号】：TD94

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