Nickel ore, nickel is an iron-loving element and ranks 5th in the earth after silicon, oxygen, iron and magnesium. It has the highest nickel content in the earth's core and is a natural nickel-iron alloy. With good mechanical strength and ductility, refractory to high temperature, and high chemical stability, does not oxidize in the air and other characteristics, has become the development of modern aviation industry, defense industry and the establishment of a high level of human material and cultural life of the modern system of indispensable metal.
Nickel ore grinding using LM series vertical roller mill
LM series vertical mill is mainly composed of grinding roller assembly, grinding disk assembly, hydraulic station, transmission arm assembly, powder selector, main reducer, motor, body, main reducer lubrication station, hydraulic station, PLC electric control cabinet and other parts.
When working, the main motor drives the grinding disc through the reducer, while the hot air enters the vertical mill body from the air inlet, the material falls in the middle of the grinding disc from the lower material inlet, under the action of centrifugal force, the material moves evenly from the middle to the edge of the grinding disc, and when passing through the grinding roller channel area on the grinding disc, it is crushed by the grinding roller, and the large piece of material is directly crushed, and the fine grain material is crushed by the extrusion to form the material bed for intergranular crushing. The crushed materials continue to move to the edge of the grinding plate until they are taken away by the strong airflow at the wind ring, while the larger granular materials fall back to the grinding plate to continue to be crushed, and the materials in the airflow pass through the upper separator, under the action of the rotor blades, the coarse particles return to the grinding plate for grinding, and the qualified fine powder comes out of the mill with the airflow and is collected by the system's powder collector, and the powder collected is the product of the vertical grinding. Iron and other debris mixed into the material with the movement of the material to the edge of the grinding plate, due to its own weight and can not be blown up by the wind, fell to the lower cavity of the mill by the scraper installed in the bottom of the grinding plate scraped into the slag discharge mouth out of the machine.
There are several advantages of the equipment as follows
1、Integrating crushing, drying, grinding, classifying and conveying in one, compact layout, small footprint; main focus on non-metallic ore, coal dust and slag three major fields, mature process.
2、The grinding roller is directly crushed on the grinding disk to grind the material, reducing energy consumption; the hot air directly contacts the material in the mill, with strong drying capacity, saving a dryer; the grinding roller sleeve is used to avoid direct contact between the grinding roller and the grinding disk, reducing wear and tear; the grinding roller sleeve can be used on the opposite side, doubling the service life.
3、The size of grinding force can be increased by hydraulic pressure boosting, so as to increase the output and improve the grinding efficiency; according to the different particle size requirements of the finished products, the powder selector adopts cage type powder selector and conical rotor powder selector respectively, with high precision of powder selection.
4、The whole machine works under sealed and negative pressure, no dust overflow; with limit device to avoid destructive shock and vibration noise; the transmission system adopts planetary gear reducer, low noise.
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