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1、Cement Grinding System Status of Roller PressWei HU1, Qingbo WANG1, 2, Bing LI1, Qian CONG1, 2, BoQU1*1. College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China 2. Key Laboratory of Engineering Bionics of Ministry of Education, Jilin University, Changchun 130022
2、, Chinaing roller is easy to get the roller sur- face worn off in the effect of high stress abrasive wear and fatigue wear of roller surface, seriously it can dis- turb the normal operation of grinding mill system. Fig.2 shows the wear sit- uation of the cement grinding roller made by Jilin Asia And
3、 Thailand Commodity Concrete Co., Ltd.Abstract The working principle of cement roller press and current development of wear resistance on the cement grinding system status at home and abroad was de- scribed. The main improvement of previous research on the wear resistance of roller press was propose
4、d from three aspects of wear-resistant material, roller press roller structure, and surface morphology. Key words Cement grinding system ; Grinding roller ; Bionic non - smooth ; Wear resistanceith the comprehensive ad- vantages, the cement indus- try in China has a promisingrial is fed through the
5、material inlet above two rollers, and enters the gap between two rollers under the action of gravity and rotation of extruded rollers, and then it turns into dense cake dis- charged from under machine after suffering high pressure extrusion from grinding roller. Theoretically, when high pressure rol
6、ler mill squeezes material, it does a pure rollering motion, and the roller surface mainly bears huge extrusion pressure in normal direction, but actu- ally, it is influenced by various factors such as the different material size and feeding rate, instable feeding speed and so on, causing correspond
7、ing sliding between materials and roller surface in the process of crushing ma- terial particles, and at the same time, because of the impact of extrusion pressure in normal direction, larger tangential friction is produced, leading to severe wear on roller surface. The extrusion pressure between gr
8、inding rollers is 50 -350 MPa, and the grind-WResearch Status of Cement RollerPressGrindingprospect in the international competi-Roller Surface Wear-resist- ing Performance Cement equipment companies at home and abroad have invested a lot of money and energy to deal with the technical problems of ce
9、ment grinding system grinding roller surface wear- resisting, and good progress has been made. The research direction and content mainly include the following aspects. Material alloys wear-resisting tech- nology Developing and selecting materi- als for roller press grinding roller is mainly to impro
10、ve the wear resistance of roller body. The commonly used grinding roller materials include ordi- nary white cast iron, alloy white cast iron, and high alloy white cast iron. For example, Yang Jianhua adds potassi- um metamorphic agent into Fe -Cr -C overlaying welding alloy to make re- sistant alloy
11、 tough and improve crack resistance, greatly improving the low stress grits wear abrasion resistance. In addition, 0 K grinding, invented by Japanese Kobe Steel(UBE), uses high chromium cast iron to manufac- ture roller set with the surface hard- ness HRC62; Swedish develops a chromium manganese sil
12、icon alloy steel which owns excellent wear re- sistance; Grinding medium of Magni-tion. Cement production consists of four stages, ore breaking, ore grinding, calcination and clinker grinding which is an especially important link. Accord- ing to statistics, the annual cement production of all cement
13、 businesses was 1.388 billion tons in 2008, an in- crease of 5.2% compared to last year. Although the industry maintains moderate growth, it consumes about 700 000 tons of wear-resistant materi- als1, an obvious distance to that in de- veloped countries. Therefore, the wear problem of cement griding
14、 system needs to be solved urgently. This pa- per analyzed the grinding roller surface wear-resisting form of cement roller press, and studied the current situation of the material and structure of cement grinding roller.Cement Roller Press and Grinding WearRollerSurfaceAs shown in Fig.1, the workin
15、g principle of roller mill is the compaction of corresponding rollers, made up of a pair of extruded rollers which share relatively synchronous rotation2. Mate-Fig.1 Brief diagram of roller millSupported by the Planning Project of Science and Technology Development of Jilin Province (09ZDGG001).*Corresponding author. E-mail: Received: April 2, 2012Accepted: April 28, 2012Alow brittle. German POLYSIUS Com- pany produces set grinding roller, the grinding roller set and lining board of which are casted with high chromium alloy cast iron, and its surface hard- ness achieves HRC63-6
