高挥发分不黏煤作高炉喷吹煤的可行性研究

摘要

针对株洲洁净煤公司炼焦煤资源紧张、产品结构单一等问题，在分析原煤性质的基础上，对株洲洁净煤公司选煤工艺进行改造，研究高挥发分不黏煤作高炉喷吹煤的可行性。结果表明：原生煤泥产率和灰分均较低，可采用不脱泥分选；原煤属于极易选煤，-1�80 g/cm3浮物累计灰分只有4�00％，可将中煤导入精煤输送系统。通过将中煤系统筛上物并入精煤输送系统，矸石水直接导入辐射式浓缩机，在精煤筛增加喷水管道及若干喷嘴，精煤压滤机滤液导入浮选系统，确定浮选复合药剂用量，在尾煤压滤泵前自动加入聚合氯化铝，并添加1套自动加药系统等措施，株洲洁净煤公司介耗降低了0�2 kg/t，水分、灰分分别降低了0�70％和0�32％，精煤产率提高3�50％，尾煤水分降低9�70％，每年增加利润500万~1000万元。株洲洁净煤公司高挥发分不黏煤作高炉喷吹煤可行。%The problems with Zhuzhou Clean Coal Company were that,the coking coal was shortage and the variety of products were mono-tonic.Based on the properties of raw coal,transformed the coal separation process.Investigated the feasibility of high-volatile non-caking coal as pulverized coal injection.The yield and ash of primary slime was low,so the separation process without desliming was suitable.The raw coal was easy to separate,the accumulated ash of-1.80 g/cm3 floats is 4.00%,so the middlings was imported into clean coal transpor-tation system.Transformed the process by importing the water from gangue into radiant thickener,adding water injection pipelines and noz-zles to clean coal sieve,importing the filtrate from clean coal pressure filter to flotation system,determining the dosage of compound agents,adding polyaluminum chloride automatically before filtering tailings,installing one set of automatic dosing system. The medium consump-tion,moisture and ash decreased by 0.2 kg/t,0.70% and 0.32%.The clean coal yield increasesd by 3.50%,the moisture of tailings de-creased by 9.70%,the profits of company rose by RMB 5×106 to 107.