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, over crushed 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. River gravel sand gravel sand making machine with which model is best? Said pebbles sand separator machine manufacturers, we first have to analyze pebbles, pebbles as a natural stone, the main chemical composition is silicon dioxide, the quality of hard , sharp color quaint, with compression, wear resistant properties of natural stone, it is an ideal green building materials. Cobblestone are widely distributed. Use crusher, sand making machine, screening machine processed river pebbles into sand, it is widely used as concrete aggregate, water conservancy and hydropower engineering, highway, highway, railway, passenger line, the bridge, airport runway, municipal engineering, high-rise building with sand. River gravel hard, the choice of which system of sand machine better it we recommend you sand pebble gravel works best equipment:? VSI sand making machine, 5X sand maker, impact sand making machine. These three sand making machine equipment are based on the principle of impact sand, stone dozen stone, can easily achieve a rigid river gravel crusher sand making, and VSI sand making machine and 5X sand making machine also has a gravel shaping, processing out pebbles sand, good size, a cube separator, fineness modulus is adjustable against dust separator, sandy uniform particle size, with the management, high strength automatic magnetic separator, than natural sand, ordinary hammer Sand play sand production more in line with the architectural requirements, can increase the quality of construction. In addition, the use of VSI sand making machine and 5X sand making machine is also more environmentally friendly, both sand making equipment work noise, no pollution. Unique air circulatory system can greatly reduce the amount of outside air exhaust, reduce dust, environmentally friendly. In addition VSI sand making machine and suitable for mounting a variety of specifications reserved dust removal equipment. Can pebbles sand production and processing. High gradient magnetic separator machine _ _ Tieling North mine equipment Zhongcheng Zhongcheng from Shenyang North mine 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 North mine into the brilliant and you work for a better future!