1. Garnet is characterized by high specific gravity, large bulk density, reasonable particle size distribution, hardness, durability and compactness. 2, garnet is a natural mineral, high hardness, acid and alkali resistance, in the processing, filtration and washing process can meet the stringent requirements of corrosion resistance, wear rate and broken rate is low, can greatly extend the service life of the filtration system. 3. The polyhedral characteristics of garnet can ensure that there are more gaps between different particles, which can play a better filtering effect than the ordinary round or oval particles of other filter materials.