The Research Of "2+2" Mold Technology For Coal Slime And Slime Water Treatment In The Coal Slurry System In Huaibei Coal Preparation Plant

As a primary energy, coal plays an important role in the national economic. Coal preparation is the most economic and the most mature technology in the way of clean and efficient using coal. Improving the way to use the coal to cleanliness and efficient become the development trend of coal preparation. In future, improve the proportion of washing coal, improve the quantity of coal preparation products will take more and more attention. As an important part of coal preparation, slime flotation,also will take more and more attention. However,in recent years, with the decrease of the coal mining and coal mining mechanization, high ash of fine mud coal slime separation has become a heavy problem of the coal industry."2+2"mold technology for coal slime and slime water treatment, have become more popular.Because it can increase the premise of clean coal in guarantee quality, reduce the moisture of cleaned coal,efficient recycling of silmer and cycle of washing water. Learn from the experience of domestic industry, The Huaibei coal preparation plant transform the original"1+1" pattern of slime water treatment system to the mode of "2+2". Eliminate the high energy consumption and low efficiency vacuum filter. Installation the Sedimentation centrifugal,which is low energy consumption, loose filter material, low water positioning product,and can recycle product at a determine size.We have analysised the effect of coal preparation before and after transformation rely on the production status of the equipment in the article. With the aid of mathematical methods, we predict the extra revenue at different ash.The plant save energy income about2.7606million yuan per year, save water income about28800yuan per year.After transform, Based on the actual production requirements, the system can earn extra revenue about2238.63thousand yuan per year. The situation of dorsal gray have been improved after transformation.It have increased the economic greatly,improved the utilization rate of resources, saved a lot of energy.The two-paragraph process of coal slime treatment can achieve an efficient recovery of fine mud with high ash,avoiding the high ash slime cycle in the process,improve the cleanliness of the cleaning water.The "2+2"mode of slime water treatment system,with ability of improving the yield of clean coal,reducing ash content,high recoveriing of silmer,ensuring coal washing water closed cycle,zero emissions of industrial water,reducing the preparation cost,is worthy of application in other coal preparation plant.