WANG Guang-ze,LV Jian-xiong,WEI Hua-zhen(Baode Coal Preparation Plant,Preparation Center of Shendong Coal Group Co.,Ltd.,Xinzhou 036600,China)Introduce four common medium dosing and preparation processes which are dry-type,fresh suspension-qualified medium bucket,fresh suspension-dilute medium bucket,medium-dosing magnetic separator medium-dosing process.After transformation,designed concentrate cyclone medium-dosing process and automatic medium-dosing process,then analysed the effect of those two processes.The results show that,without additional power equipments and floor space,the former process is much simpler and more reliable,into which the high density medium can be added,the total investment including equipments and energy consumption of the former process is less 105 yuan than that of magnetic separator medium-dosing process.The automatic medium-dosing process adopts partial drop-dead halt,makes full use of the current potential energy,the high density medium can be added continuously and automaticmatically.Its recovery is much higher.Taking one coal preparation plant as sample,whose medium consumption once was five tons one day,adopting the automatic medium-dosing process,it decrease by 50 percent in the course of preparing,in other words,120 tons one year,economic benefits increases by 1.8×105 yuan,saves one laborer.
2012 06 v.18;No.82 [Abstract][OnlineView][Download 695K]