Application of Bentonite
2021-03-27
Bentonite is a water-bearing clay mineral mainly composed of montmorillonite. The chemical composition of montmorillonite is: (Al2,Mg3)[Si4O10][OH]2•nH2O, because of its special properties. Such as: swelling, adhesion, adsorption, catalytic, thixotropy, suspension and cation exchange, etc., so it is widely used in various industrial fields.
1. Application In Environment
In the environmental field, bentonite can be used as an adsorbent to treat heavy metal ions, organic pollutants and radioactive substances in wastewater. It can also be used as a drug addict to absorb nuclear radiation oil pollution, treat urban domestic garbage, purify industrial waste gas, etc., of which it is most used for wastewater treatment, and its application prospects are extremely broad.
2. Catalyst And Carrier
By modifying bentonite, using the modified bentonite as a catalyst not only eliminates the shortcomings of traditional catalysts, but also has a better catalytic effect, which is more in line with the requirements of the development of green chemical industry in the 21st century and has good application prospects.
3. Foundry, Metallurgy And Drilling Fields
Because of its cohesiveness and plasticity, bentonite can be used as a suspending agent for the production of alcohol-based coatings and a binder for mold materials in the foundry industry. As a binder for pellets in the metallurgical industry, it not only saves 10% to 15% of coke and flux consumption, but also increases the blast furnace production capacity by 40% to 50%.
4. Applied In Building Materials Field
Bentonite and its modified products are widely used in the building materials industry, such as white cement, waterproof materials, fireproof materials, ceramic industry, cementing materials, architectural coatings and new functional materials, etc., which can play a good role in thickening and waterproofing effect.
5. Applied Agriculture And Animal Husbandry
Bentonite is mainly used in agriculture as a soil conditioner, fertilizer slow-release agent, fertilizer additive, and pesticide adsorbent.
6. Rubber Field
After nano-modification, organic bentonite becomes nano-level organic bentonite. It is widely used in rubber materials and can improve the air tightness, tensile stress, tensile strength, heat resistance and wear resistance, corrosion resistance, and tear strength of rubber. And many properties such as chemical resistance.
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