Production process of silicon dioxide

1. Gas phase method

It is mainly chemical vapor deposition (CAV) method, also known as pyrolysis method, dry method or combustion method. Its raw materials are usually silicon tetrachloride, oxygen (or air) and hydrogen, which will react at high temperatures.

2. Precipitation method

Precipitation method is also called sodium silicate acidification method. Through precipitation, filtration, washing, drying and calcination, water glass solution reacts with acid to obtain silica.

1. Rubber products

Silica is used in colored rubber products to replace carbon black for reinforcement to meet the needs of white or translucent products. Silica also has super adhesion, tear resistance, heat resistance and aging resistance, so it can also replace part of carbon black in black rubber products to obtain high-quality rubber products, such as off-road tires, engineering tires, radial tires, etc.

2. Agrochemicals

In agricultural chemicals such as pesticides and high efficiency fertilizers, silica can be used as carrier or diluent, disintegrant, and disintegrant in water dispersible particles wdg to improve the suspension rate. About 10% is recommended. Super high specific surface area, high adsorption capacity, easy suspension, good affinity, good chemical stability, and can maintain lasting effect. Even in rainy, washing and hot conditions, it can remain unchanged for a long time.

3. Daily chemical products

Transparent colored and opaque toothpaste with silica as filler and abrasive. These toothpastes have good flexibility, dispersibility, smoothness, soft paste, good abrasion resistance, and will not wear the toothpaste tube; It can keep the stability of medicated toothpaste.

4. Cementitious agent

It can be used for adhesives made of natural rubber or synthetic rubber to provide thixotropy and reinforcement. At the same time, because of its ductility, it can also improve the adhesion, with high quality and low price.

Anti caking agent

5. Silica can be used in some products to improve free mobility, such as grass fertilizer, agent, grinding wheel abrasive, rubber sulfur and anti caking mixture.

Paper Filler

Using silica as paper filler can improve the ink resistance and mechanical strength of the paper, increase the whiteness and reduce the unit weight. It can effectively realize the lightweight of paper, reduce the production cost and improve the performance of paper.

In addition, it can also be used in many industries, such as fire extinguishing agent, feed, cosmetics, matting agent, pigment, coating, etc.