不同煤种混合入选动态调控模型的优化

摘要

In order to improve products quality in preparation of unsized raw coal,based on lump coal production index and technical pa-rameters of Yanzishan coal preparation plant as well as the mixing ratio of two kinds of raw coal,taking Jurassic and carboniferous raw coal in Datong coal mine as research object,establish and optimize dynamic control model between technical parameters and products quantity and quality.Forecast the dynamic change trend of product quantity and quality,lump coal separation density.The results show that the opti-mized production rate of lump coal,ash content,moisture content and calorific value optimization model of the correlation coefficient R in-crease by 0.07245,0.22410,0.15157,0.16059 respectively,lump coal production index dynamic control model is improved significantly. After regulation,the yield and calorific value of product increase by 1.10% and 0.45 MJ/kg,the ash decrease by 1.28%.The regulation re-alizes the effective control of coal products quality.%为解决不同煤种混合入选导致产品质量难以控制的问题,在分析燕子山选煤厂块煤生产指标及工艺参数的基础上,以大同矿区侏罗系煤和石炭系煤为研究对象,根据入选原煤中两种煤混煤率的变化,建立选煤生产工艺参数与产品数质量指标之间的动态量化模型,预测分选产品的数质量和块煤分选密度的动态变化趋势,并对不同煤种混合入选动态调控模型进行优化。结果表明：优化后块煤产率、灰分、全水分和发热量优化模型的相关系数R分别提高了0.07245、0.22410、0.15157、0.16059,说明块煤生产指标动态调控模型的优度有了显著提高。不同煤种混合入选动态调控技术的应用结果表明：调控后产品质量明显改善,产率、发热量分别升高1.10％和0.45 MJ/kg,灰分降低1.28％,实现了选煤产品质量的有效控制。