Magnesium ore is mainly used for refractory materials, and secondly for chemical raw materials, building materials, smelting metal magnesium and so on. At present, the utilization of magnesite is developing in the direction of high-grade and synthesis, especially the sintered magnesia ore, which has high purity, high density and large amount of crystals. In the market competition, it is a development trend to continuously improve the deep processing level of magnesium materials, improve product grades, and increase the added value of products.
Magnesium ore adopts flotation method, light burning method, thermal separation method, gravity separation method, electric separation method, radiation separation method, magnetic separation method and other methods of beneficiation. Choose the corresponding beneficiation method for different magnesium ore. Method, light burning method is the most effective method to produce magnesia, flotation method is the most common, simplest, and most frequently used method, it is the beneficiation process of magnesite magnesite. The magnesite flotation method mainly undergoes four processes: crushing, grinding and grading, flotation, and concentration.
The large ore is crushed by a crusher for magnesite beneficiation. The vibrating feeder sends the magnesite material with a particle size of less than 200mm to the jaw crusher for crushing, and then is crushed to a smaller particle size by the rotary crusher , Enter the round screen, the particle size is less than 10mm and does not meet the grinding requirements, and then enter the crusher to crush to 0-10mm.
After the magnesite is crushed by the crusher, the particle size is less than 10mm. The ore feeding equipment sends the crushed ore to the ball mill for monomer dissociation. In order to achieve the best grinding fineness, the grinding is required The 200 mesh ore size accounts for more than 70%.
The beneficiation equipment mainly used in the separation stage of the magnesium ore beneficiation process is a flotation machine, a mixer, and a thickener. A single reverse flotation selection process cannot effectively remove impurities in the ore. The selected magnesium concentrate contains magnesium oxide as high as 0.35%. Therefore, the flotation process of magnesium ore generally consists of reverse flotation (coarse sweep) and positive flotation (coarse flotation). One fine) composition, all tailings are selected for anti-floating, and magnesia concentrate and medium ore are selected for positive floating.
The magnesite powder is ground into magnesite powder by a ball mill, sent to the agitator and mixed with the flotation agent, and then flotation and reverse flotation are carried out, and finally into the concentrator to flocculate the ore particles in the slurry. In order to achieve the purpose of reducing moisture.