五虎山选煤厂原煤自发酸化机理研究
投稿时间:2018-10-05  修订日期:2019-08-17  点此下载全文
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作者单位E-mail
马 玮 中国矿业大学(北京)化学与环境工程学院 1020600261@qq.com 
蔚志恒 神华乌海能源有限责任公司  
马秉波 甘肃靖远煤电股份有限公司大水头煤矿  
张玉秀 中国矿业大学(北京)化学与环境工程学院  
石 旭 中国矿业大学(北京)化学与环境工程学院  
付晓恒 中国矿业大学(北京)化学与环境工程学院 13601307011@163.com 
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:针对五虎山选煤厂高硫煤在洗选加工之前酸化的情况,利用实验及微生物分类测序技术对煤样酸化的成因机理进行研究,并对微生物在不同分类水平相对丰富度进行统计。结果表明:刚从矿井采出的原煤中微生物的丰富度最高,存在四种具有硫氧化功能的硫杆菌属,分别是Acidithiobacillus、Sulfobacillus、Acidiferrobacter和Azonexus,且随外置时间的增加,这类微生物含量逐渐减少。依据微生物复合作用理论对这类菌属的作用机理进行分析,煤样酸化的主要原因是高硫煤中硫铁矿在空气、水和微生物的共同作用下形成硫酸、硫酸高铁溶液,从而影响了煤炭的加工利用。
中文关键词:高硫煤  微生物分类测序  丰富度  硫氧化  酸化
 
Mechanism of spontaneous coal sample acidification in Wuhushan coal preparation plant
Abstract:In view of high sulphur coal acidificationl in Wuhushan coal preparation plant before mineral processing.The genetic mechanism of coal sample acidification was studied by using experiments and microbial classification sequencing technology. and the relative abundance of microorganisms at different classification levels was also calculated. The results show that the microbial richness is highest in raw coal just extracted from the mine. In addition, there are also four thiobacillus species with sulfur oxidation function, namely Acidithiobacillus, Sulfobacillus, Acidiferrobacter and Azonexus, and the microbial content gradually decreases with the increase of external time. Finally, based on the theory of microbial recombination, the mechanism of this genus was analyzed. The main reason of coal sample acidification is that the pyrite in the high-sulfur coal formed the solution of sulfuric acid and ferric acid under the combined action of air, water and microorganisms. Thus affecting the processing and utilization of coal.
keywords:high-sulfur coal  microbiological sequencing  richness  sulfur oxidation  acidification
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