Hydrogen fluoride gas is a common flotation agent in the purification process of quartz sand.

In the purification process of quartz sand, according to the different properties of raw materials, a variety of technological methods can be used.

Among them, hydrogen fluoride acid flotation is a method that uses hydrogen fluoride as a chemical reagent to help separate feldspar and quartzite.

This method involves the use of sulfuric acid or hydrochloric acid and the addition of specific capture agents to achieve a flotation purification effect.

The following are the main quartz sand purification processes:

Fluorine-free acid flotation: This method does not use hydrogen fluoride, but uses sulfuric acid or hydrochloric acid with higher aliphatic ammonium salts and petroleum sodium liu sulfonate mixed to capture the effect of purification. This process reduces the discharge of fluorinated wastewater and is more environmentally friendly.

Fluorine-free and acid-free flotation: This is a new flotation process that does not use any acid or fluoride. By taking advantage of the structural differences between feldspar and quartzite, as well as the adjustment of the proportion of anionic and cationic capturing agents in the neutral medium, the feldspar is preferentially flotation, so as to achieve separation from quartzite.

Hydrogen fluoride has acid flotation: This is the traditional method to improve flotation efficiency by using hydrogen fluoride and other acidic substances, but the use of this method is limited due to environmental concerns.

Hydrogen fluoride gas these processes have their own advantages and disadvantages, and fluorine-free acid flotation method and fluorine-free acid flotation method are gradually developed and applied because they are more environmentally friendly. However, due to the limitation of technical conditions, these new processes may still have the problems of immature technology and high operation difficulty, so they need to be further optimized and improved in practical application.