It is generally said that quartz sand purifies water. Do you also think that quartz sand filter material can absorb impurities like activated carbon filter material? In fact, quartz sand filter material is mainly through the gap between the edge of the filter material and sand particles to intercept the granular or flocculent material in the water, not real adsorption, one of the most important factors is the wear rate and damage rate. Then the filter material standard specification CJ/ T44-2005 stipulated wear rate and breakage rate is what?

      First of all, a small sample was used for testing, and according to the silica content, Mohs hardness, hydrochloric acid dissolution rate and other indicators composite national standard GB/T 43-2005 "Filter material for Water Treatment".

      Secondly, sensory selection of quartz sand is also important. Quartz sand with pure white and non-impurity spot leaf is the best, quartz sand has high transparency, quartz sand belongs to high quality quartz sand. Miscellaneous low white quartz sand belongs to ordinary quartz sand. And the purity of quartz sand after pickling is the highest.

      Third, the particle size of quartz sand should be uniform, and the difference of thickness and span should be very small. And quartz sand should be more regular particles, and can not be in the form of sheet.

      Finally, there are no pores on the surface of quartz sand, if there are pores, it is not qualified; Quartz sand joints have gaps, it is not obviously good; With a key or a penknife has a deep scratch, it is obviously unqualified; Below 200 mesh sandpaper grinding, stone powder easy to drop, unqualified; There are cutting cracks on the lower edge of the cutting surface, unqualified; . The sum of the two must not exceed 3%. If the total is more than 3%, it will only have a negative impact on the performance of quartz sand filter material to achieve the effect.