府谷某高灰长焰煤煤泥浮选试验研究

发布时间：2018-03-22 13:37

本文选题：低阶煤　切入点：浮选　出处：《中国矿业大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着低阶煤资源的大量开采,细粒级分选问题进一步凸显。前人研究证明,使用常规浮选无法解决这一难题。由王永田教授等研发的新型复配药剂FO系列,对低阶煤煤泥可以实现较好的分选。本文用复配药剂FO系列做捕收剂对府谷某高灰长焰煤煤泥进行浮选试验研究,主要的探究内容如下:使用红外光谱分析,证实煤泥表面存在大量含氧官能团,导致煤泥疏水性差;由XRD以及XPS分析可知,煤泥中大部分的脉石矿物是Si O2。通过煤泥性质分析可知,该煤泥具有一定的利用价值。筛取-0.5mm粒级的物料进入浮选系统。入浮煤泥灰分为38.87%,实验室采用一粗一精的浮选工艺。柴油药剂消耗量为8kg/t时,精煤灰分7.05%,产率40.84%;使用新型复配药剂FO作为捕收剂,当药剂用量为2.5kg/t时,浮选精煤产率能达到40%左右。结果证明,FO药剂在降低药剂消耗,提高精煤产率方面优于柴油。半工业试验浮选柱一次分选,结果显示:低浓度直接浮选中FO1用量为2.0kg/t时,精煤灰分为7.49%,精煤产率为57.84%;使用滤饼调浆浮选,FO1用量为2.0kg/t时,精煤灰分10.76%,精煤产率55.42%。对比发现低浓度条件下可以获得更佳的浮选指标。调浆浮选中,FO2用量为1.5kg/t时,精煤灰分10.86%,精煤产率60.03%;FO3用量为1.5kg/t时,效果略优于FO2。从分选结果来看,FO3捕收效果最佳,后续亲油亲水比以及润湿热测定结果证实这一结论。用新型复配FO系列药剂作捕收剂,是低阶煤煤泥浮选工业化进程的重大进步。对低阶煤煤泥进行浮选,可以提高资源的利用效率,对提高煤矿的经济效益具有重要的意义。
[Abstract]:With the large exploitation of low-rank coal resources, the problem of fine grain-grade separation becomes more prominent. Previous studies have proved that conventional flotation can not solve this problem. The FO series, a new compound agent developed by Professor Wang Yongtian and others, has been developed. In this paper, the flotation experiment of Fugu coal slime with high ash and long flame is carried out by using the compound agent FO series as collector. The main contents are as follows: using infrared spectrum analysis, It is proved that there are a large number of oxygen-containing functional groups on the surface of the slime, which leads to poor hydrophobicity of the slime, and the analysis of XRD and XPS shows that most of the gangue minerals in the slime are Sio _ 2. The slime has certain utilization value. The material of -0.5mm particle size is taken into the flotation system. The slime ash is divided into 38.87.The flotation process of one coarse and one fine is used in the laboratory. When the consumption of diesel oil reagent is 8kg/t, The ash content of clean coal is 7.05 and the yield is 40.84.The new compound agent FO is used as collector. When the dosage of reagent is 2.5kg/t, the yield of flotation clean coal can reach about 40%. The results show that when the amount of FO1 in low concentration direct flotation is 2.0kg/t, the coal ash is divided into 7.49 and 57.84 percent. The ash content of clean coal is 10.76 and the yield of clean coal is 55.42. It is found that a better flotation index can be obtained under the condition of low concentration. When the dosage of FO _ 2 in slurry flotation is 1.5kg/t, the ash content of clean coal is 10.86 and the yield of clean coal is 60.03 and the dosage of FO3 is 1.5kg/t. The result is a little better than that of FO2.The result of separation shows that FO _ 3 has the best collection effect, and the hydrophilic ratio of hydrophilic oil and moisture are determined to confirm this conclusion. A new type of compound FO series medicament is used as collector. The flotation of low rank coal slime can improve the utilization efficiency of resources and improve the economic benefit of coal mine.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD94

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