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Limestone is mainly composed of calcium carbonate, part of which is broken into stones or sand as aggregates for concrete, and part of which is ground into powder, which is used to make cement or raw materials for bleaching powder, refractory materials, and desiccants.
There are many types of equipment that can grind limestone into powder. Some customers ask if there is equipment that can grind 50 tons of powder per hour? Yes, but which machine to choose depends not only on the output but also on the fineness of the output.
Raymond mill can process materials with Mohs hardness below 7, the moisture content of the material is required to be below 6%, the fineness range of the finished product is 0.8-0.045mm, and the processing capacity is 0.8-9.5 tons per hour.
The material below 20mm is sent to the feeding hopper by the bucket elevator. The feeding hopper sends the material into the grinding chamber and falls on the grinding ring. The continuously rotating grinding ring gives the material a centrifugal force to move it to the outer circle. , into the grinding range of the grinding roller.
After grinding, the material falls from the edge of the grinding ring, is blown up by the hot air sent by the blower, and is separated by the cyclone separator. The qualified material leaves the grinding chamber, and the unqualified material falls back into the grinding ring.
The high-pressure micro powder mill is an advanced version of the Raymond mill, which grinds materials by the extrusion force generated by the opposite rotation of two horizontally installed extrusion rollers. After the material enters the grinding chamber, the closed material layer moves downward under the action of gravity. During the movement, it is pressed into a cake by the pressure of the extrusion roller, and the cake contains a large amount of fine powder.
The feed particle size of the micro powder grinding mill is below 15-25mm, the finished product particle size is 0.125-0.010mm, and the production capacity is 0.2-12 tons per shift.
The three-ring/four-ring ultra-fine grinding mill grinds the material repeatedly through multiple loops to obtain ultra-fine powder efficiently.
The main part of the ultrafine grinding mill is composed of the main engine, the reducer, the analyzer, the fan, the bypass powder collector, the maintenance platform and the electric control cabinet. The auxiliary machine part consists of jaw crusher, bucket elevator, electromagnetic vibrating feeder, storage bin and so on.
The material enters the equipment, is thrown to the edge of the turntable, falls into the grinding chamber, and undergoes multiple grinding to become powder. The fan pulls the ground powder away, which is controlled by the powder concentrator. The powder that does not meet the requirements is returned to the machine cavity and ground again to become finer. The powder that can pass through the powder separator is the finished product, and the pulse dust collector separates the powder from the air to achieve the purpose of collection. The production process operates under negative pressure, and there is no dust spillage.
The fineness of the finished product of the ultrafine pulverizer is between 150-3000 mesh, and the output can reach up to 50 tons/hour.
Vertical roller millis a grinding equipment that integrates crushing, drying, grinding, grading and conveying. The grinding principle is similar to that of Raymond mill. The difference is that it can blow hot air into the grinding chamber, saving a The cost of the dryer.
The fineness of the finished product of the vertical roller mill is between 0.17-0.033mm, the model is from small to large, and the processing capacity can be from 10-40 tons per hour to 90-320 tons per hour.
The European-style coarse powder grinding mill can crush all kinds of ores with a compressive strength of not more than 320MPa. The structure of the coarse grinding mill mainly includes a casing, a rotor, a hammer head, a grate bar, etc. The materials are crushed by the impact force brought by the high-speed rotating hammer head. The humidity of the crushed material should not exceed 5%.
The feeding particle size of the European-style coarse powder mill is below 100mm, and the output particle size is 0-3mm, which can process 35-132 tons of materials per hour.
To sum up, how much the output of the limestone powder mill can reach depends on what kind of mill you use. According to the fineness of the powder, limestone powder can be divided into single-flying powder, double-flying powder, three-flying powder and four-flying powder. If you want to produce 50 tons of materials per hour, it is recommended to choose vertical roller mills and European-style coarse powder mills. Grind coarse powder with a coarse powder mill, and use a vertical mill for fine powder. For the processing of ultra-fine limestone powder, ultra-fine grinding mill is the best choice.
