兴隆庄选煤厂煤泥分选工艺改造与优化设计研究

发布时间：2018-05-07 13:21

本文选题：煤泥 + 分选　；参考：《安徽理工大学》2015年硕士论文

【摘要】：近年来,随着煤炭开采机械化程度的提高,煤质变化较大,原煤中煤泥含量越来越高,尤其-0.5mm粒级在入洗原煤中占有较高比重。在这种情况下,煤泥能否得到高效分选,直接影响选煤厂的洗选效率和经济效益,更决定着循环水质量,从而影响整个洗选工艺。因此,煤泥水的有效处理在选煤生产中至关重要。兴隆庄选煤厂原有工艺中对于-0.5mm粒级的分选精度不高,回收率低,导致部分煤泥损失在尾矿中,造成精煤损失,影响洗水质量。因此需对该厂煤泥分选工艺进行优化改造,提高精煤回收率,增加经济效益。通过对原有工艺的分析,多方案研究对比,发现经过浮选系统可以回收可观量的精煤。最终确定了兴隆庄选煤厂煤泥分选工艺：水介旋流器组+弧形筛截粗+煤泥浮选+尾煤浓缩压滤。即对-0.5mm粒级分级回收,由水介旋流器组分级,弧形筛截粗回收粗煤泥,-0.3mm粒级进入浮选。同时进行了大量的药剂试验,重点做了絮凝沉降试验,以及浮选试验,确定了适合兴隆庄选煤厂煤泥水处理环节的药剂制度。最后,对优化后的煤泥分选系统进行采样,试验,分析工艺效果。优化设计后,提高了精煤回收率,增加了精煤产率,提高了尾煤泥的灰分,增加了选煤厂经济效益。该工艺运行后,具有技术可靠,分选效率高,系统简单,易操作管理的优点。
[Abstract]:In recent years, with the improvement of mechanization of coal mining, the coal quality changes greatly, and the content of coal slime in raw coal is more and more high, especially -0.5mm grain-grade occupies a higher proportion in washing raw coal. In this case, whether the slime can be separated efficiently directly affects the efficiency and economic benefit of coal preparation plant, determines the quality of circulating water, and thus affects the whole washing process. Therefore, the effective treatment of coal slurry is very important in coal preparation. In the original process of Xinglongzhuang Coal preparation Plant, the separation accuracy of -0.5mm particle grade is not high, and the recovery rate is low, which results in the loss of part of coal slime in the tailings, resulting in the loss of clean coal and affecting the quality of washing water. Therefore, it is necessary to optimize the separation process of coal slime in this plant to improve the recovery rate of clean coal and increase economic benefit. Through the analysis of the original process and the comparison of many schemes, it is found that the considerable amount of clean coal can be recovered through the flotation system. Finally, the separation process of coal slime in Xinglongzhuang Coal preparation Plant was determined. That is to say, the gradation recovery of -0.5mm particles is carried out by the water medium cyclone group, and the coarse slime is recovered by the arc screen, and the coarse coal slime grade of -0.3mm is entered into the floatation. At the same time, a large number of medicament tests were carried out, the flocculation settlement test and flotation test were carried out, and the medicament system suitable for coal slurry treatment in Xinglongzhuang Coal preparation Plant was determined. Finally, the optimized slime separation system is sampled, tested and analyzed. After optimized design, the recovery rate of clean coal is increased, the yield of clean coal is increased, the ash content of tail slime is increased, and the economic benefit of coal preparation plant is increased. The process has the advantages of reliable technology, high sorting efficiency, simple system and easy operation and management.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD94

【参考文献】