Study And Application Of High Manganese Steel Ball Mill Liners

In this paper,the development of anti-wearing iron and steel is reviewed.Based on the situation that Mnl3 is used in QIDASHAN concentration plant of mine company in ANSHAN steel,a new kind of anti-wearing steel is designed which is called Mn₁₃Cr₂Ti through analyzing the wear behavior of the lining boards using in ball mills,the component of alloy elements and the particular demands of lining boards using in mine's ball mills.The cast structure,the quenched structure,mechanical property,the anti-wearing property and the producing process of the Mn₁₃Cr₂Ti steel has been studied. The composition range of alloy elements' is list as follows:C:1.20～1.30%,Si:0.40%～0.60%,Mn:12.5%～14.0%,Cr:1.5%～2.2%,Ti:0.1%～0.14%,V:0.15%～0.25%,Mo: 0.3%～0.5%,P＜0.05%,S＜0.03%.The result of application experiment shows that mechanical properties and anti-wearing property of Mn₁₃Cr₂Ti steel are optimized after the heat treatment of quenching after austenite at 1050℃and 8 hours' tempering at 250℃, the intensity exceeds 700MPa and the toughness is over 150J/cm².The fabric analysis shows that the organization of tempered martensite+bainite+temper troostite+retained austeninite+dispersion carbonide make it obtaining good comprehensive mechanical character.And the anti-wearing property of Mn₁₃Cr₂Ti steel is 15 percent to 35percent higher than Mn₁₃Industrial application shows that Mn₁₃Cr₂Ti steel lining board's producing process is simple and controllable and the durability of Mn₁₃Cr₂Ti steel lining board is 30 percent higher than Mnl3 lining board.And the cost-effectiveness analysis shows that the cost of Mn₁₃Cr₂Ti steel lining board production is a little higher than Mn₁₃ lining board,but considering both of the efficiency of milling and the cost of tearing and wearing,the profit of Mn₁₃Cr₂Ti steel lining board is 1230 yuan more than Mn₁₃lining board.The economic benefit 296400 yuan has been obtained accumulative.It benefits to both economy and society markedly.