Sand reasons Kun type of gear damage analysis we know Kun-type sand making machine at work in the harsh environment, leading to equipment prone to some problems jaw crusher, which led to the equipment we need for routine maintenance, Now I'll tell about the cause of damage to equipment gear in order to obtain convenient use in future work. 1 equipment gear at work for some time will produce small pits, this problem is mainly produced at the time of gear engagement. Cycling gear surface contact force is generated due to fatigue in the surface of the gear so that leaves a fatigue crack, and crack propagation caused by metal particles flake form pits. 2 at high speed during the meshing zone due to the pressure is too large, because of the high temperature lubricant film rupture, resulting in direct contact with the metal to produce a high temperature at the time of friction welding gear will make two surfaces stick together. Two separate metal gear will make when the tooth surface is torn, the teeth surface forming grooves. Two gear surface three pairs Kun type sand maker equipment can cause tooth wear, especially in the open operation because of dust, sand and other particles into the tooth surface caused by wear and tear between the relative sliding of serious wear and tear when the tooth surface When will lose the right to make teeth tooth. At work we have to do maintenance on equipment four roll crusher, in order to avoid reducing the efficiency of our work, to increase the loss of business. Ball mill grinding fineness of grinding production cost impact analysis is part of the concentrator high, how effective and reasonable control of the grinding fineness is dressing directly reduce costs, improve important economic factor processing plant. We must first fully understand the factors of grinding fineness. To sum up, the grinding fineness factors are: ore hardness, crushing particle size, the grid mesh sieve, to the ore size, number of balls, ball size ratio, ball mill liner wear, ball mill Pai mine mouth flush size. Understanding all of these factors in the production operation, we want to find one by one to find the best adjustment factor. Ore mineral hardness: different minerals, its hardness is not the same, this factor is fixed with respect to the same ore, but also can not be adjusted. However, in production, under the premise of beneficiation technology requirements can be reasonably ore, the ore as possible uniform size, bulk, powdered ore ratio is reasonable stable. Grading machine spindle lifting height, is also an important factor in returning the amount of sand and grinding fineness of. The normal grading machine spindle production requirements into place. Some workers in the concentrator milling equipment maintenance, as ore grading machine not clean, sink set in a long time, relatively heavy solid sludge, grading machine spindle at the lower levels, because they do not care, did not completely drop spindle , resulting in less than normal amount of sand back to the case. Broken particle size, grate sieve adjustment is construction related, grader blades wear: worn blade with respect to return the amount of sand is reduced, resulting in grinding fineness thicker, in addition, if badly worn blades, will affect grader life cone crusher, so timely inspection work in blade wear, classifier overflow weir level, affecting the size of the precipitation zone of ore crusher, in production we can request the grinding fineness and appropriate to the classifier overflow Weir height adjustment, if the requirements of the grinding fineness thinning can be welded at both edges grader certain degree of angle iron, with a wooden pull plug method to adjust the level of the classifier overflow weir, sometimes after long-term accumulation of sludge, naturally increase the height of the weir. Double roll crusher _ Shenyang North Mine Zhongcheng (Online) _ Shenyang from Shenyang North mine crusher equipment Zhongcheng Limited. Shenyang North Mine Zhongcheng equipment Limited (sybkzc.com) (www.sybkzcjq.com) Liaoning Shenyang, machining leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. North Mine in Shenyang Zhongcheng equipment Limited leadership with the staff warmly welcome all inquiries negotiations to create the Shenyang North Mine Zhongcheng equipment Limited a better future.