WANG Zhi-hui1,YANG Jian-xun2,WANG Ju-long2,LI Guo-ping1,WANG Rui-peng1(1.Shanxi Yangguang Coking(Group) Co.,Ltd.,Hejin 043300,China; 2.Schenck Process(Tianjin) Industrial Technology Co.,Ltd.,Tianjin 300385,China)The analysis of raw coal characteristics in Yangguang coal preparation plant(CPP) indicates that coal types of this plant are quite complicated and variable,and the content of primary slime varys greatly.In order to solve the following problems existed in coal preparation plant No.1,such as more needed equipments,poor slurry treatment ability,high concentration of circulating water,increasing medium consumption and the like,analyze the advantages of structural and modular CPP for plant NO.2.Through comparison and analysis in the following five aspects,equipment selection,slurry systemic selection,overall recovery of products,automation control level and economic benefits,the results shows that,in plant NO.2,the equipment selection in the main building has realized the centralization,large-scale,single set and system simplification,and the operation cost has sharply reduced.Moreover,the range of equipment selection has expanded,which decrease the load of coal slurry system and guarantee production more stable and reliable.It basically realizes pure reject discharge,and dramatically increased ash content of filter press tailings and the product recovery.It also significantly improves automation control level of CPP.Power consumption and heavy medium consumption have been reduced by 0.9 kWh/t and 1 kg/t respectively, that means that have saved electric charge 1.08 million yuan and total cost 1.2 million yuan per year.Finally,put forward corresponding measures for operation problems in Yangguang coal preparation plant NO.2,such as great amounts of clean coal missing in middlings and rejects,unstable clean coal ash and so on.
2012 02 v.18;No.78 [Abstract][OnlineView][Download 171K]