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The harmful components of the flotation quartz particles are connected on the surface in the form of spots or inclusions. To remove these impurities before PTMS Electromagnetic Separator process, it is necessary to undergo acid leaching treatment. The common acids used in acid leaching are sulfuric acid, hydrochloric acid, nitric acid and hydrofluoric acid. The above acids are effective in the removal of Fe, AI and Mg. It was found that hydrochloric acid had better removal effect on iron than sulfuric acid.

PTMS magnetic separation

 
In quartz sand, because the harmful components are in the form of mineral aggregates rather than pure minerals, the leaching effect of mixed acid is better than that of single acid. The proportion of various acids and the order of addition also have a great influence on the removal of impurity minerals. The acid concentration should be suitable, the acid concentration is too low, the time is long, the yield is low and the impurity removal effect is not good; The PTMS Electromagnetic Separator process is required.

what is magnetic separation process？

High acid concentration will not only increase the cost, but also increase the corrosion of PTMS Electromagnetic Separator process equipment, and also reduce the output of SiO2. The acid leaching temperature has great influence on the removal rate of impurities in quartz. The lower the temperature, the slower the reaction speed and the longer the reaction time. The higher the temperature, the faster the evaporation of acid, thus increasing the amount of acid.
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