Classifier mill with representatives of the world's advanced production technology of heavy calcium carbonate
Thousands of calcium carbonate Reuters : At present, the new large-scale domestic production line of ultra-fine GCC are used on behalf of the world's advanced level of large-scale dry calcium carbonate production equipment and technology - with a classifier mill process . For example Anhui Guofeng Group TSP a factory ( Anhui Guofeng new non-metallic materials Limited ) 100,000 tons production line of ultra-fine GCC , GCC Plant ( former East Jiuhua in Anhui nest Calcium Advanced Materials Co., Ltd. ) 150,000 tons of ultra-fine GCC production line.
The above lines are chaired by Hefei Cement Research & Design Institute , its core is the key equipment imported German Apline companies, some key equipment and all auxiliary equipment are used domestic tender way processing. In cooperation with foreign companies large powder process, HCRDI profound analysis of the equipment and technology gap between domestic and international advanced equipment and technology. Has made remarkable achievements in the actual production line design and construction, especially its ADW, ACS and ACF series grader confirmed by practical application , with advanced processing equipment comparable.
Mill liner, bucket and enhance long-term access to materials in the pulp side corrosive operating environments , subject to the impact of the ball and minerals and grinding , belong wearing parts. Under normal circumstances, the liner can be used for six months, and out of the discharge end can use about 2 a . 2007 , Dragon Bridge Mining Ltd. Lujiang station MQG3245 ball mill concentrator in a newly installed liner three months later, the frequent
Dislocation occurs plaid lining and bolts of the leakage of plasma phenomena , causing the accident } born downtime seriously restricting the normal production , equipment operation rate was only 86% left layering and enhance bucket wear, loose bolts cause plaid lining , plaid lining pressure area reduction .
( 1 ) plaid lining and enhance fighting installation in the form of a transverse section in Figure l ( middle position is the flat head bolts , not shown in Figure 1 , below) . With a flat head bolts layering ( see Figure 2 ) locking , by layering two side ramps will be tightly pressed plaid lining to enhance the fight on the outer surface of the tail and bolts of basic layering phase level. Long-term operation in the mill , as highlighted in plaid lining layering plane , keep hitting the ball Simplified layering surface , when the pressure of being part of grinding away , the ball will naturally hit the rear bolt , the bolt internally generated cyclic stress , cause the bolts loose, and may even be broken. ' So not only will the ball mill discharge plasma leakage cap bolt position , there may be so severe plaid lining off, affecting the normal production of mill ore .
( 2 ) pulp in the lower end of discharge through the pores plaid lining to enhance the inflow of fighting , and then go along with simplified and discharged along the upper channel . Pulp in corrosive environments , enhance the fight by grinding the material is very serious. When the edge of the bucket to enhance the contact liners grid ( dashed circle in Figure 1 portion) is worn , the supporting role of the liner on the affected lattice , resulting liner loose lattice , the lattice causes serious loss of the liner support and tilted inward , thus causing the accident downtime . When this happens , the gap plaid lining and pressure the ball down between the bars into the discharge end , the ball mill discharge port can see a big ball spit , if imperfect means of discharge , the ball into the classification system , each device will have a period of grinding ore inflicting great damage . The grid side liner designed integrally with the pressure of the protruding structure , the other side of the panel structure is designed and inserted into the lower protruding structure by bolts to improve the grid is pressed against the bucket liner . Thus, the lattice bucket liner and improve the contact area increases, and the good contact and pressed by means of bolts at elevated bucket, the bucket to improve the wear on the edge of the grid is almost no liner . In addition , the position of the tail flat head bolts deepened, plaid lining across the plane , even if all the prominent structure is polished, it will not hit the ball directly to the bolt , the bolt to avoid being cyclic stress due to loose or broken.
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