Tech Text

Particle size and material used for filter media of stainless steel filter mesh

The particle size and material used in the filter medium of the stainless steel filter mesh are determined by factors such as the nature, size and filtration speed of the particulate matter particles to be filtered. Commonly used filter materials are quartz sand, garnet particles, anthracite particles, magnetite particles and the like. 
stainless steel filter meshAmong them, quartz sand is the most common. The mechanical strength of the sand is large, the relative density is about 2.65, and it is chemically stable in acidic wastewater with a pH of 2.1-6.5. However, when the wastewater is alkaline, there is a phenomenon of Luo, which is usually replaced by marble and limestone.The chemical stability of anthracite is better than that of quartz sand, and it is not found in any environment. The disadvantage is that the mechanical strength is poor, and the density of different producing areas is different, generally 1.4-1.9. Multilayer filter media is commonly used in large density tanning materials, in which the garnet and magnetite have a relative density greater than 4.2 and a Mohs hardness greater than 6. For the filter medium containing colloidal materials, the adsorption coke, granule bone charcoal, anthracite charcoal and other materials should be used.

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