How better choice grading equipment? In the grinding process, ore particle size from large to small not occur simultaneously, but gradually completed. In the crush of every stage, there is always a part of the desirable fine particle generation out. In the grinding process, in order to separate the qualified fines promptly to prevent over crushed grader, improve mill productivity, the need to complete the grading equipment. Eligible particles from the classification overflow (sieve sieve under the product) feeding elected not work, coarse grinding and then grinding it returns. The current classification used in the concentrator equipment: spiral classifier, hydrocyclone and a fine sieve. 1) spiral classifier. This classifier is based on mineral particles of different sizes in an aqueous medium settling velocity difference to classification. Because of its simple structure, stable, easy to operate, widely used in the concentrator. Spiral classifier spiral surface height position and overflow in the tank at high weir type, sinking and low weir. Weir for the separation of high grain size greater than 0.15mm overflow, it is used for the first stage of grinding, and the sinking of less than 0.15mm grain size suitable for the separation of products, mostly in the second paragraph of the composition and grinding mill Closed. 2) hydrocyclone. Hydrocyclone is the use of centrifugal force to accelerate the settlement of mineral particles grading equipment, it requires pressure to mine, so power consumption of large Shanghai dressing grader, but the small footprint, low price, large capacity, high classification efficiency, availability very fine relief goods, used in the second stage of closed-circuit grinding grading equipment. 3) a fine sieve. Since the spiral classifier and hydrocyclone is classified according to the mineral particles of different sedimentation rate in an aqueous medium, it is easy to produce useful minerals enriched in the sand in the anti-causing valuable minerals over crushed. The fine screen is exactly as the geometry of grade ore particles with almost no impact on the density and high efficiency rating, so in recent years, a fine sieve for grading equipment in the grinding cycle and more attention. I can recommend the right equipment and models to the user based on the user's actual production situation and conditions, we will own professionalism and years of experience to you to make reasonable, cost-effective professional suggestions for you to use two rollers are driven by two electric motors, and for opposing rotation. Ore from the upper to the crushing gap is formed between the two rollers carried. Metal Mine smooth roll surface due to multi-use, so crushing effect mainly by crushing, and comes with some grinding action (when the tooth surface is mainly by chipping effect). Material crushed by gravity self-discharge. This feature is due to crusher material through two rollers in the middle when pressed only once, so less over crushed phenomenon. Roll crusher has a simple structure, compact, lightweight, reliable, low cost, easy maintenance, etc., and the broken product particle size uniformity Shenyang Mining grader, smashing the small, fine particle size (you can break to 3.0mm or less). Therefore suitable for the treatment of brittle materials and materials containing clay sticky small processing plant (such as tungsten ore), as the crushing purposes. The main disadvantage of roll crusher is the low processing power. Pay special attention when the roll crusher on the following matters: (1) to strengthen the work to iron ore. Non-broken (solder first class thereof) fall into the inter-roll will damage the crusher, resulting in parking accident. So before the crusher should be installed in addition to iron. (2) viscous material easy to plug the broken space, in the process clogging failure should stop treatment, can not be stabbed mine in operation. (3) When the material handling chunk containing more, pay attention to large pieces of ore from the crushing space easily squeezed out, to prevent injury or damage to the device. (4) roll crusher operation after a long time, due to the larger roll surface wear can cause product size too small, then we should adjust the port of discharge or equipment maintenance. (5) to strengthen inspection of equipment for lubrication equipment to refuel on time and keep good equipment lubrication. Shenyang Mining grader | grader | North Mine congregation to congregation by the Shenyang North mine to machinery and equipment Limited. Shenyang North Mine Zhongcheng equipment Limited (sybkzc.com) (www.sybkzcjq.com) strong, credible, in Shenyang, Liaoning province machining industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the public into Shenyang North mine equipment Limited and you hand in hand into the brilliant, for a better future!