The hardness of silicon carbide is between corundum and diamond. It has high hardness and wear resistance. The finer the particle size, the higher the mechanical strength, shatter resistance and strong toughness. Guilin Hongcheng is a manufacturer of silicon carbide grinding mills. Today, I will introduce you to the crushing and milling process of silicon carbide.
The choice of silicon carbide crushing process is first to determine the number of crushing stages, which depends on the initial feed particle size and the particle size requirements of the final crushed product. Under normal circumstances, the final product cannot be produced only through primary crushing (except for tertiary crushing). The initial feed particle size is related to the smelting grading method and the warehousing storage method of the graded products. The final crushed product particle size mainly depends on the product process requirements after crushing and the on-site equipment process level. The crushing section is generally divided into: one-stage method, two-stage method, and three-stage method.
The one-stage method is mainly primary crushing: that is, jaw crushing and hammer crushing are used for crushing, and hammer crushing can only crush tertiary products with low hardness. The particle size of the product is generally in the range of 0-30mm to 0-50mm. The particle size of hammered products without screening is generally around 0-10mm.
The two-stage method is mainly primary crushing plus secondary crushing: after primary crushing by jaw crusher, secondary crushing is carried out by large and medium-sized crushers such as roller crushing, hammer crushing, and impact crusher to obtain final products. The particle size of roller crushing products is generally about 0-30mm, and the particle size of hammer crushing and impact crushing products without screening is generally about 0-10mm.
The three-stage method is mainly primary crushing plus intermediate crushing, followed by fine crushing: after primary crushing by jaw crusher, secondary crushing is carried out by large and medium-sized crushers such as roller crushing, hammer crushing, and counterattack crushing, and then used Ball mills, Barmac crushers, wheel mills, etc. are processed to obtain final products. The particle size without sieving is generally about 0-5mm, and the product of 0-1mm can be obtained with vibrating sieve, and the oversize is generally about 10%-30%. The sieve of the Barmac crusher can reach about 30%-50%.
Evaluation from the particle shape of the product: the wheel mill is the best, and the ball mill is the worst. The silicon carbide powder making process also belongs to the three-stage method: primary crushing plus intermediate crushing, followed by Raymond mill.
Silicon carbide powder making process: First, the raw material is initially crushed by the jaw crusher, and then further crushed by the roller crusher, and the finely crushed raw material enters the ball mill or Raymond mill for fine processing, and finally the final product is screened by a vibrating screen . For products that require magnetic substances, a magnetic separator must be used to remove the magnetic substances. The final processed products are formally sealed and put into storage after the product test meets the technical specifications. The difference in the silicon carbide powder making process scheme is mainly in the use of ball mills or Raymond mills for fine processing. The particle shape of the product using the ball mill is better, and the dust in the product processing process can be well controlled, but the disadvantage is that the productivity of the ball mill is low. When Raymond mill is used, the particle size of the product is finer, and the dust of the product cannot be controlled during the screening process.
Guilin Hongcheng is a manufacturer of silicon carbide mills. The silicon carbide Raymond mill we produce has been widely used in the market. If you have relevant procurement needs, please leave us a message for details.