Study On Floatation Technology Of Fine Coal In Shenhua Nining Coal Power Coal Preparation Plant

With the national emphasis on the deep processing of coal resources gradually increased,the original thermal coal separation process is gradually developing from the traditional lump coal separation of the end of coal separation to the full coal washing.With the improvement of environmental protection requirements,enterprises are also paying more attention to environmental protection,and the discharge of coal slime directly affects the environmental protection of enterprises.Therefore,in order to minimize the discharge of slime,according to the floatability characteristics of slime in thermal coal,it is imperative to carry out the research on slime flotation and separation process in thermal coal preparation plant by using effective separation equipment and separation agents.In this paper,three full-grade coal washing plants were selected for sampling,and the coal washing plants for further testing were determined through the analysis of test results.The physical and chemical analysis of raw coal was carried out.Through the analysis of its mineral composition,it was clear that the slime of raw coal was serious,which caused inconvenience to subsequent separation.Then,the coal samples produced in jindongfeng coal washing plant were sampled and analyzed,and the coal samples were tested for distributed release to determine the floatability of the coal samples.Through small flotation tests with different feed concentrations of-0.5mm coal samples,it was determined that the flotation index was the best when the feed concentration of flotation was 80.00g/l.After determining the concentration of flotation feed,different flotation agents were used for comparative tests.By constantly optimizing the relevant reagent system,it was concluded that the flotation effect was the best when angxin keji co.Conclusion:coal slime in thermal coal preparation plant can be used to separate cleaned coal products by flotation,but the recovery rate of combustible body is low and the consumption of chemical agent is high.Sodium silicate and sodium hexametaphosphate as adjusting agent for coal slurry flotation,through the test,can both reduce flotation plant ash,by making comparison experiment of flotation machine and flotation column to determine the vortex micro bubble flotation column as a separation device,the slurry preprocessor as slurry preparation equipment,fast open type of filter press as plant dewatering equipment.Through the mechanism analysis and selection of sorting equipment,the equipment simulation layout of the existing plant was carried out.There are 13 pictures,41tables and 54 references in this paper.