Improvement of products calorific value in Lijiahao coal preparation plant
SUN Jingyang
Abstract：The analysis of raw coal supplied to Lijiahao coal preparation plant show that,it's low-medium ash and sulfur,extra low phos-phorus,high calorific value non-caking coal and long flame coal.There are lots of gangue in raw slime and the gangue is easy to degrade, so it needs to minimize the contact time between coal, gangue and water during separation. The ash of secondary slime is 74. 23%, the gangue degrade seriously and mainly exist in -0.045 mm fine slime.Transform the coal preparation plant by improving management,refor-ming coal handing equipments, adding supplement coal system, fine slime and gangue discharging systems. After transformation, the raw coal moisture reduces by an average of 3%,the supplement of high-quality coal can improve the coal delivery situation in raw coal bunker, products bunker and coal handing equipments.The fine slime can be recycled rapidly,the calorific value of lump clean coal and mixed slack coal can be improved obviously,the coal preparation plant increases profits 3×107 yuan per year.
Keywords：primary slimesecondary slimegangue degradationcoal blending
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 25-27,31 )