FLOWCHART OF JLLM VERTICAL ROLLER MILL PROCESS
LSM series ultra-fine vertical mill is developed by Jinlun Company, based on decades of production experience and absorbing the technology of ultra-fine vertical mill from Germany, Japan and Taiwan, China as well as adopting high-quality wear-resistant accessories. It is developed to be an ideal equipment in the mill industry, which integrates the functions of crushing, shattering and grading transportation. The technical design team cooperates with the mechanical research team of domestic universities. And the maximum fineness of the finished products of ultra-fine vertical mill can reach XXX.
LSM series ultra-fine vertical mill is widely used in calcium carbonate, talc, iron powder, carbon black, bentonite, molybdenum powder, limestone, wollastonite, dolomite, mica, ultra-fine cement, electricity, metallurgy, chemical industry, etc. It is used for grinding blocky, granular and powdery raw materials into the powder materials meeting the requirements.
工作原理/ OPERATING PRINCIPLE
The motor drives the millstone to rotate through the reducer, and the materials fall into the center of the millstone from the feeding inlet through the feeder. As the millstone rotates, the materials under the action of centrifugal force move to the edge of the millstone and are crushed by the grinding roller when passing through the annular groove of the millstone. The crushed materials are carried by high-speed air flow at the edge of the millstone, and large particles directly fall on the millstone for regrinding. When the materials in the air flow pass through the upper separator, the coarse powders fall from the cone bucket to the millstone for re-grinding under the action of the rotating rotor. The qualified fine powders are ground together with the air flow and collected by the dust collector, becoming the products ultimately. By adjusting the separator, different roughness parameters can be achieved.
技術優勢/ TECHNICAL ADVANTAGES
Specific surface area is 20,000±1,000cm2/g, d97=8.5um. Products can be produced by JLSM-1150 vertical roller mill.
Grinding: After the raw materials are transported to the main engine, the centrifugal force of the bottom millstone pushes raw materials outward the area between the grinding wheels for grinding. Each of the three grinding wheels has an individual hydraulic connecting rod to control the grinding pressure. The constant pressure output by the oil hydraulic system is 65-75kg/cm2, so that the raw materials are ground between the three grinding wheels and the millstone. The oil hydraulic system is equipped with six accumulators to absorb the vibration force generated when the particle raw materials are ground preliminarily.
Classification: After the raw materials are ground into fine powders between the grinding wheels and the millstone, they overflow from the periphery of the millstone and enter the rotating conical grouped blade area at the top as the annular air flow rises. The coarser powders passing through the classified blade area cannot pass through the blade area classified at the set rotation speed, but directly fall on the lower part, continuing to be ground. The powders passing through the classified blade area are called fine powders, which will be collected into the dust collector at the rear section. According to the fineness required by the finished product, different classification devices such as double-layer blade-size classifying blade (coarse powder), tapered aluminum alloy classifying blade (fine powder) or composite horizontal rotation stepped gear (ultra-fine powder) can be selected.
Airflow: After the fine powder passes through the classified blade with the airflow, it enters the pulse bag filter. After the dust collecting device collects the fine powder, the separated air will be carried out in the system again through the windmill, and the airflow will be in a negative pressure state in the whole system. Therefore, the problem of environmental pollution caused by dust overflow is eliminated. If the raw material is moist, the air flow heating device can be heated. And the drying and grinding can be carried out simultaneously.
Control: Through programmable touch man-machine and various control components installed on the electrical control panel, such as current controller, machine load controller, frequency converter, alarm device and other remote controllers connected, the system operates fully automatically in the production state with the best efficiency.
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