Crusher beneficiation need to consider several issues

      the cement industry with the ball mill grinding head board,Mobile Crusher in the coarse grinding position (a position) the feed side, it is also known as side liner.As a cement mill warehouse mostly broken-oriented, large feed size, impact energy, the ball an average ball diameter> 80mm, especially large or extra large ball mill grinding conditions can be quite bad.The choice of the grinding head board material,jaw crusher safety-oriented,jaw crusher mostly using high-manganese steel or deterioration of high-manganese steel, ultra-high manganese steel material, but the production reflects the many problems: First,[rock crusher:http://www.xb-machine.com] the wear resistance of less than, the use of life of 6 to l2 months;  alicey599 plastic deformation uplift,cone crusher pull fold / broken bolt, causing the lining to the overall fall and early failure.Low alloy steel for grinding head plate has the strength and toughness to match the content of alloying elements, abrasion resistance is not very good, the general life in about 16 months, affecting the efficiency of cement grinding.

   In March 2003 my company to undertake the preparation work of the two o5.4mx15.5m oversize mill liner.The company has import liner, the useful life of three years or so, To this end, the contract signed, the other requirements of the life of the grinding head board at least three years.Requirements for the use of cement industry in large and extra large ball mill grinding head board, Cr26 high chromium cast iron material for research and development production, and its chemical composition: 2.6% to 2.9% C,brick making machine 22% to 28% of Cr, Si < ; 1.2%, 0.5% ~ 1.0% Mn, 0.6% ~ 1.2% Mo, 0.4% ~ 1.2% Ni, 0.4% ~ 1.2% Cu, V, Ti, B trace, RE0.25, S <0.06%, P <0.10%.The process of heat treatment: quenching temperature of 10 C 卤 20 C, tempering temperature 320 ~~ 420.Casting average hardness HRC> 58, the average impact toughness a ~~> 5J/cm.Quenching and tempering organization: tempered martensite + eutectic carbides MC + secondary carbide + retained austenite.Cr26 high chromium cast iron grinding head board has continuous operation of more than six years, is expected to continue to use about 2 years, indicating a good abrasion resistance.NSP production enterprises in China's cement industry large and extra large ball mill wear-resistant lining safety applications and energy saving, reliable technical support, and promote the technological progress of the wear-resistant materials, and promote the use of significance.