Quartz sand is a common inorganic material, the main component is silicon dioxide (SiO2). High-temperature roasting is a common method to treat quartz sand, and rotary kiln is a common high-temperature treatment equipment. The following are some of the reasons why quartz sand is roasted at high temperature in rotary kiln:

1, Crystalline phase transition: Under high temperature conditions, quartz sand may undergo a crystalline phase transition, evolving from an amorphous or low-crystallinity state to a more ordered crystalline state. This helps to improve the physical and thermal properties of quartz sand.

2, remove impurities: high temperature roasting can help remove some impurities in quartz sand, such as organic matter, moisture, oxides and so on. The presence of these impurities may affect the quality and use of quartz sand.

3, particle size regulation: High temperature treatment can change the particle structure and particle size distribution of quartz sand. Through the rotary kiln's rotary movement, uniform heat treatment can be realized, which helps to regulate the particle size.

4, improve chemical activity: high temperature treatment helps to improve the chemical activity of quartz sand, so that it is easier to react with other materials, so that it can be used in a wider range of industrial fields.

5, improve the melting properties: high temperature treatment of quartz sand can improve its melting properties. This is critical for some special applications, such as glass manufacturing.

6, strengthen the mechanical properties: high temperature treatment helps to improve the mechanical properties of quartz sand, so that it is more resistant to high temperatures, wear and corrosion resistance, thereby increasing its durability in some industrial processes.

The application of rotary kiln in this process is mainly due to the advantages of its structure and working principle. The rotary kiln usually consists of a long, diagonally set rotating cylinder, a structure that facilitates uniform heating of the material. The material is subjected to gravity and centrifugal force in the rotating cylinder, resulting in more uniform heating. This design makes the rotary kiln ideal for high-temperature processing, such as roasting quartz sand.