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"Full grind " also known as "full grind" or "boring mill ," is common during mill operation an abnormal phenomenon . "Full grind" sign : degree of light grinding sound muffled by the sharp turn , mill tail The quantity reduction in the import and export of drying mill discharge pressure increases ; extent Lantus grinding sound disappears , the main motor current is reduced to about 70% of the normal value , end mill greatly reduced the quantity ; particularly severe degree Grinding returning materials , grinding tail out of material , pulling pump gas exports are not even a little . If you open the door mill inspection , can be found : 1 , panel adhesive material is very thick ( some about 50mm), wrapped up on the ball very thick Material layer ; 2 , slit diaphragm plate grate badly clogged ; 3, the warehouse about 90 % of the available space is occupied grinding media and materials ; "full grind" , while also accompanied by thickening of the mill product fineness and chemical extremely significant The change phenomenon . Extreme chemical change rule: "full grind" early , hard grind the ingredient significantly reduced, "full grind" gradual elimination , the hard grind ingredient content and significantly above normal. "Full grind " is a tube mill inlet and outlet quantity loss of balance, memory quantity in a short time due to excessive wear , the reasons are: 1 , feeding excessive, grinding grinding capacity can not meet . 2 , the granularity of the material into the mill grindability bigger or worse, there is no time to reduce the volume of feed . 3 , into the grinding material moisture content is too high, and poor ventilation , the wind can not be generated during grinding water vapor and fine material promptly brought out outside the mill , causing the material due to high humidity and adhesion to the ball and lining Plate surface , increasing the buffering effect reduces the grinding efficiency ; while wet material also blocked compartment plate and discharge grate plate gap , causing nesting difficult. This causes "full grind" more common. 4, the diaphragm plate seam is broken iron grate and debris blocked. 5, the closed-circuit system, the powder of the powder reduced efficiency, feed back too much, but did not reduce the volume of feed mill, ball mill grinding capacity can not meet . 6 , an average ball diameter ball position is too small, or fill rate is too low, or a warehouse grinding fill rate lower than the two positions too much . Seven , one , two storage room or two -compartment plate a partial broken off or perforation , caused by grinding channeling position , grinding ability. Once the "full grind" , should be carefully identify the reasons to be eliminated. Exclusion method is generally to reduce or stop feeding , and to strengthen the mill ventilation, feed mill in less or no material transported under Turn , to generate more heat . Drying heat into the grinding mill should be increased , prompting the moisture evaporates quickly and was hot air away ; while making the ball on the liner and the slit diaphragm plate grate adhesion The material in its lower thermal expansion of the adherend cracking and spalling under repeated impact grinding . If invalid , stop feeding in the case of adding to the mill grinding materials ( raw mill plus dry Coal or lime, slag cement mill plus dry or dry slag ) , to be close to normal after a grinding sound , feeding a small amount of material ; grinding sound normal, gradually increase the volume of feed until the normal feeding . "Full grind" Very serious , sometimes required grinding down approach: the positions of the ball and poured material , completely cutting down on the liner and the ball crust, clear slit diaphragm plate grate obstruction , and then reconfigure the ball or dress Pour into a ball . Clearance in a ball when needed , using the grinding down of this approach is appropriate. -YF.luz Contact person:Luz Liu Cell:+0086 15890678157 Email:yfplant@gmail.com MSN:yfplant@hotmail.com Yahoo:Yfplant@yahoo.com Skype:yfplant Website: C8 QQ:745062087 Facebook:Luz Liu
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