Production and application of bentonite
Bentonite is a water-bearing clay rock with montmorillonite as the main component. It has excellent swelling, adsorption, cation exchange, catalysis, cohesiveness, suspension and plasticity and other special properties. It is known as "universal clay" , The application field is very wide. Natural bentonite often contains gangue minerals such as quartz, feldspar, mica, etc., which results in unsatisfactory performance. It requires intensive and deep processing methods such as grinding and modification before it can be used in industry. As a professional bentonite grinding mill manufacturer, our bentonite grinding mill can process 80-3000 mesh bentonite powder, and has been widely used in various industries downstream of bentonite and has gained a good reputation.

The YGM Raymond mill, HGM micro powder grinding mill and huge capacity producing CLUM ultra-fine grinding mill independently developed by our company, both can be used for the grinding of bentonite, which can meet your different output request and different request of finished product fineness. Of course, these three types of grinders are also suitable for grinding other ores with a Mohs hardness of less than 7, and each type of powder grinder has its own unique advantages in different situations. If you have a demand for grinding mill, you can always contact us WhatsApp: +86 13917147829.

The following is a compilation of 65 kinds of bentonite uses, so that you can have a deeper understanding of the bentonite industry.

1. Drilling mud
Bentonite has excellent suspension and thixotropy in aqueous solution, that is, when there is external stirring, the suspension behaves as a sol with good fluidity. After the stirring is stopped, it will arrange itself into a gel with a three-dimensional network structure. Settlement and water separation occur, and it is especially suitable for preparing drilling mud. It is understood that, on average, about 8 tons of bentonite are used for each well.
2. Binder for metallurgical pellets
Bentonite has good properties of water absorption, dispersion, lubrication, thickening, etc. It is the main binder for metallurgical pellets to achieve the bonding of iron fine powder by acting on water.
3. Molding sand binder
Sodium bentonite has strong plasticity, good reusability, high wet compressive strength, strong formability, and high cavity strength. It can prevent sand inclusion, scarring, block loss, sand collapse, etc., and is convenient for casting in wet or dry state in the metal industry Mould is the preferred sand binder for precision castings.
4. Feed additives
Bentonite contains more than 10 kinds of mineral elements, most of which are the macro and trace elements necessary for the growth and development of livestock. Adding bentonite to the feed can make the animals vigorous, feathers are bright and clean, the survival rate is high, and the disease resistance is strong.
5. Cat litter
Cat litter has always been the main application market for bentonite in Europe, accounting for 29% of its total consumption. When encountering cat feces and urine, bentonite cat litter can quickly form agglomerates. Bentonite used as cat litter requires strong liquid absorption and odor ability, uniform particle size, and does not disintegrate after being damp.
6. Medicinal suspending agent
Suspensions have good bioavailability, making it easier to administer suspensions, especially for children and the elderly who have difficulty swallowing, which brings convenience to taking medicine. Bentonite is an excellent suspension in suspensions. Agent.
7. Antidiarrheal drugs
Montmorillonite, the main component of bentonite, has a layered structure and non-uniform electrical distribution, which has a strong selective adsorption effect on some viruses, bacteria and toxins in the digestive tract. For example, SMECTA developed by French Ipsen Company is a gastrointestinal viscous protective agent with montmorillonite as the main component.
8. Desiccant
Bentonite desiccant has the effects of adsorption activity, static dehumidification and odor removal. It is widely used in products that cannot be sealed in oil or gas phase, such as dry air sealing in optical instruments, electronic products, medical care, and food packaging.
9. Animal and vegetable oil decolorizing agent
Bentonite is used as raw material and activated by inorganic acid to prepare active self-clay. It has good adsorption and decolorization performance, and has the effects of decolorization, deodorization, detoxification, and reduction of oil oxidation. It can be widely used in the decolorization and refining of animal and vegetable fats, such as soybean oil, Rapeseed oil, peanut oil, cottonseed oil, etc.
10. Alcohol clarifier
Sodium-based bentonite is used to clarify various wines. The clarification effect is better than the sizing method, heating filtration method and aluminum sulfate method, and maintains the original ingredients of various wines, and more effectively maintains the long-term of various wines. Stability, no precipitation, loss of gloss, or deterioration for more than 2 years.
11. Beverage clarifier
Bentonite is used in the clarification of fruit juice. It can not only adsorb polyphenols such as tannins, but also adsorb macromolecular colloidal particles such as protein, and also complex with metal ions, thereby eliminating the many kinds of non-biological turbidity caused by juice. Factors, the clarification effect is ideal.
12. Soy sauce processing
Adding 1% of the raw material weight of bentonite to the production of soy sauce can increase the amino acid production rate and total nitrogen utilization rate of the soy sauce, and at the same time improve the nutrition of the soy sauce.
13. Aged vinegar clarifier
Using chitosan and bentonite as raw materials, the developed bentonite loaded with chitosan clarifier can effectively remove the turbidity and sediment in the vinegar.
14. MSG decolorizing agent
Modified bentonite can be widely used in MSG production. After bentonite is treated with a modifier, methyl cellulose salt, the starch saccharification solution in MSG production can be decolorized. The saccharification solution does not absorb glucose. The content of arsenic decreased by 87%, and the content of crude protein decreased by 27%, which is conducive to improving the quality of MSG.
15. Catalyst carrier
Due to the special structure of the pillared clay, the bentonite can accommodate the converted metal ions in the catalytic process with redox effect, and can change its oxidation state as a catalyst carrier. Therefore, it can be used to prepare iron cross-linked bentonite, intercalated bentonite loaded iron-doped TiO2 photocatalyst, TiO2/bentonite and other waste water catalyst materials.
16. Food packaging materials
At present, a series of nanocomposite plastics based on polyamide, polyester, polystyrene, polyaniline, polyurethane, etc. have been successfully prepared using natural mineral bentonite as the dispersed phase. Among them, nylon 6nm plastic film has better barrier properties, mechanical properties and transparency, and is an ideal food packaging material.
17. Papermaking retention and filter aid
The bentonite layer has a negative surface and a positive edge, which is easy to adsorb colloidal substances. When bentonite is hydrolyzed in water, cations form negatively charged particles in the form of sodium ions. This kind of negatively charged particles is not affected by the pH value and also shows good performance in acidity and alkalinity. Therefore, this characteristic of bentonite is widely used in papermaking processes such as retention and drainage aids and white water recovery treatment.
18. Waste paper deinking
In the waste paper recycling system, bentonite (used alone or in combination with talc) can reduce the tendency of ink and stickies to deposit on the various parts of the paper machine by adsorbing and binding ink and stickies to the fibers Minimal.
19. Rheology control agent for paper coating
When montmorillonite is dispersed in the water phase, the surface hydration and the repulsion of the interlayer electric double layer will cause the bentonite layer spacing and volume expansion, which can make the bentonite increase in the water phase system. Because of its thick effect, bentonite can be used as a rheology control agent in paper coatings.
20. Papermaking filler
Bentonite is used in the production of low basis weight paper, which can obtain high filling amount without reducing the strength of the paper, especially the tearing degree. Modified bentonite can also be used as a filler for low whiteness paper and cardboard.
21. Paper developer
The acid clay treated with hydrochloric acid, sulfuric acid or phosphoric acid has high adsorption performance and catalyst activity. The pressure-sensitive copy paper used for fax paper, invoices and computer records uses the chemical reaction of acid clay and white (colorless) dye to achieve chemical color development.
22. Pulp resin control agent
Modified organic bentonite is also an effective resin control agent due to its larger specific surface area and organic affinity. It can absorb the hydrophobic colloidal resin in the system, reduce the surface energy of the resin, and make the resin lose its unique viscosity, thereby inhibiting the adhesion, coalescence and deposition of the resin.
23. Papermaking wastewater treatment
The application advantage of bentonite in the treatment of wastewater from the pulp and paper industry lies in its strong adsorption performance and decolorization ability. It achieves the purpose of reducing COD and decolorization by adsorbing pollutants in the wastewater.
24. Inorganic thickener for coating
Bentonite has strong water absorption and can absorb water about 5 times its own mass. After adsorption, the volume increases, and it can swell to several to ten times the original volume, and form a gel-like substance to wrap the pigment and filler particles in the paint. Prevent particles from settling. As an inorganic thickener, bentonite has a certain degree of application in the production of coatings. Its characteristics are significant thickening effect and suspension, which can make coatings thixotropic, which is convenient for storage and construction.
25. Suspended anti-settling agent for coating
Bentonite has good suspension and dispersibility in water medium, and can release charged particles to function as a dispersant, which can improve the suspension of water-based coatings. Adding proper amount of bentonite to architectural coatings can make the resulting coatings difficult to precipitate , It is not easy to layer, and the color is uniform, thereby improving the suspension stability of the coating.
26. Auxiliary binder for paint
Because bentonite has good cohesiveness and hiding power, it can be introduced into architectural coatings to replace part of the base material and other fillers, thereby reducing product costs.
27. Rheological additives for coatings
Organobentonite has amazing adsorption and swelling ability and thixotropic effect in solvents. It is used as a rheological additive in the production, construction, storage, and film forming stages of coatings, giving coatings structural viscosity at low shear speeds.
28. Waterproof coating
Bentonite can be used as a raw material for waterproof coatings. Bentonite emulsified asphalt waterproof coating is a mixture of bentonite and asphalt to prepare a waterproof coating. It is mainly used for roof waterproofing, which can increase work efficiency by 50%, reduce engineering costs by 40%, and greatly improve workers' working conditions. , Improve the waterproof effect.
29. Waterproof material
Bentonite has the property of swelling in contact with water. Generally, when calcium-based bentonite swells, its swelling is only about 3 times its own volume, while sodium-based bentonite absorbs water 5 times its own weight when exposed to water, and its volume swells to 15-17 times its original volume. Above, using the properties of bentonite, it can be used to produce waterproof blankets, waterproof boards and other waterproof materials.
30, water swelling and water stop strip
The water-swelling water-stop strip is made of rubber as the base material, and is mixed and extruded with fillers such as sodium bentonite, super absorbent resin, plasticizer, tackifying resin, and anti-aging agent to determine the expansion ratio of the water-stop strip. It is sodium bentonite, because sodium bentonite has the function of absorbing water and swelling.
31. Rubber functional packing
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.
32. Grease
Bentonite grease is a grease made by using activated bentonite as a thickening agent and thickening mineral lubricating oil. It has high and low temperature performance, chemical stability, thermal stability, and good shear resistance. It is mostly used in automobile chassis, Lubrication of universal joints, steering rudders, wheel hubs and water pump bearings.
33. Agriculture and forestry water retaining agent
After adding bentonite to the water-retaining agent, the heat resistance and strength of the water-absorbing gel will increase with the increase of the added amount of bentonite. This composite water-retaining agent with high bentonite content can be used in oilfield profile control and water shutoff, agriculture, forestry, etc. aspect. Sodium bentonite has better suspension properties than calcium bentonite, so it is more suitable as a raw material for water-retaining agent.
34. Pesticide carrier
As the carrier of pesticides, bentonite not only makes pesticides safe and convenient when applied, but also reduces the distribution of pesticide residues, thereby effectively inhibiting the percolation of organochlorine pesticides in the soil caused by the rainfall process.
35. Mould release agent
Montmorillonite is the main raw material for the production of mold release agents. High-purity montmorillonite has very good adsorption of mycotoxins and anti-diarrhea effects.
36. Cleansing mask
Bentonite often appears in skin care masks in the cosmetics industry. Bentonite is not only used as a filler to reduce costs, but also has a good effect on skin care. For example, the use of bentonite has a certain effect of adsorbing grease and cleaning, and a certain amount of bentonite can be added to our common blackhead mask products.
37. Toothpaste additives
Bentonite inorganic gel has the characteristics of thickening, thixotropy, anti-electrolyte salts, good acid resistance, acid and alkali resistance, and stable performance. When added to toothpaste, it can reduce the amount of organic binder CMC and improve the viscosity of the paste Large, low consistency, poor thixotropy and other problems.
38. Shampoo additives
The addition of modified and purified high-quality bentonite to the shampoo not only changes the thixotropy and viscosity of the shampoo, but also significantly enhances the washing effect, which has the effect of washing and protecting. In the process of shampooing, the viscosity of the shampoo in the washing area is lower than that in the stationary area, and it is not easy to flow. It has a certain protective effect on the eyes and can prevent blindness. In addition, bentonite has the ability to neutralize calcium salts to prevent calcium deposits from adhering to the hair. At the same time, the detoxification effect has a certain effect on chronic dermatitis and skin pruritus. It also reduces dandruff and enhances the effect of combing.
39. Detergent
Natural bentonite is refined, processed and organically modified into a detergent. It has a good cleaning effect on cotton, linen, wool and other fabrics after pretreatment. After washing, the fabric is soft, smooth and comfortable to wear. The comprehensive production cost is only equivalent to 5%-10% of the cationic surfactant, which has obvious social and economic benefits.
40. Moisturizer
The special network structure of bentonite can convert a large amount of free water into bound water to increase its viscosity. An appropriate amount of organic and inorganic glue is often added to the lotion to improve the stability of the emulsion. The high-purity modified bentonite can be used in aqueous solution. It forms a non-Newtonian liquid type thixotropic gel, which is an ideal emulsion stabilizer in cosmetics.
41. Soap, soap, liquid soap
Bentonite is refined into inorganic mineral gel through purification, modification, modification, compounding and other processes, which is an important additive for soap and soap. Adding 4% of mineral gel to each ton of soap can save 344 kg of mixed oil, that is, 1 kg of mineral gel can save 8.6 kg of mixed oil. The social and corporate benefits are very considerable, which is helpful for alleviating the oil tension in my country and reducing production costs. Realistic meaning. Mineral gel can also be used in liquid soap, and the dosage is 1%.
42. Plastic starch bentonite composite material
Using starch and bentonite as raw materials, through new technology processing and application, the produced BMSC products smell of yellow rice and can be completely degraded in a few minutes in water. This plastic starch bentonite composite material is regarded as a perfect substitute for white plastic
43. Polymer composite materials
Organobentonite can also be used in the field of composite materials, especially for polymers and their modification. Nano-organic bentonite can be used in the nano-modification of plastics (nylon, epoxy resin, polyolefin, etc.) and rubber products, which can effectively improve its heat resistance, strength, and wear resistance.
44. Bentonite/rubber nanocomposite
The bentonite is dissociated into a nanocrystalline layer in water, and nanometer-mixed with nano-rubber latex in water, and the nano-mixed structure is fixed by rapid coagulation and dehydration technology to prepare a bentonite/rubber nanocomposite material.
45. Composite flame retardant materials
Bentonite itself is an inert material. Combining it with magnesium hydroxide, research and preparation of bentonite composite fillers with good flame retardancy, non-toxicity and low price have important application value.
46. ​​Heavy metal ion adsorption material
The removal mechanism of bentonite for heavy metal ions in water is based on the exchange of cations adsorbed between montmorillonite layers and heavy metal ions in water. It can be used for heavy metal ions containing chromium, cobalt, nickel, copper, zinc, cadmium, mercury, lead, etc. Removal. Studies have shown that the modification of bentonite can significantly improve its ability to remove heavy metal ions. The greater the cation exchange capacity (CEC) of the modified bentonite, the stronger the ability to remove heavy metal ions.
47. Phosphorus-containing wastewater treatment materials
In recent years, research on modified bentonite adsorbents has provided a new way for wastewater dephosphorization. Deng Shuping used acid and polymer flocculant polydimethyldiallylammonium chloride and cationic polyquaternary ammonium salt to modify bentonite. The results showed that the amount of modified bentonite was 6g/L, pH=7, and adsorption time was 40min. , When the temperature is 20℃, the removal rate of phosphorus in sewage can reach more than 98%.
48. Printing and dyeing wastewater treatment materials
Modified bentonite mainly treats printing and dyeing wastewater by physical adsorption. Xia Xinkui and others decolorize the printing and dyeing wastewater after acidic activation of calcium-based bentonite. The one-time COD removal rate reaches 76% and the chroma removal rate reaches 87%. If it is filtered by a double-layer filter column, the chroma removal rate can reach over 93%, and the COD removal rate can reach 78%.
49. Organic wastewater treatment materials
Aromatic compounds are highly toxic and difficult to degrade organic matter. Organically modified bentonite is mostly used for the treatment of this kind of wastewater, and with the growth of the carbon chain of the modifier, the adsorption capacity of the modified bentonite increases significantly. Modified bentonite can not only be used to remove pollutants in organic wastewater, but also can be used as a catalyst to accelerate the process of removing pollution in wastewater.
50. Ammonia nitrogen wastewater treatment materials
Hu Qiaokai used calcined bentonite to study the adsorption of ammonia nitrogen wastewater. The results show that the bentonite modified by magnesium ions has good adsorption performance for nitrogen. When the mass fraction of magnesium ions in the bentonite is 2%, it is calcined at 300°C. At 2h, when pH=6, the dosage of magnesium ion modified bentonite is 10g/L, and the adsorption time is 30min, the removal rate of ammonia nitrogen wastewater with a mass concentration of 100mg/L can reach 91%.
51. Wastewater treatment materials for MSG production
The wastewater produced by the MSG industry not only has a high concentration, but also has a large amount of water. At present, a good solution has not been found at home and abroad. In recent years, many scholars have used the dispersion, adsorption, and colloidal properties of modified bentonite to recover glutamate-producing bacteria and other organic substances in high-concentration MSG wastewater, and have achieved certain results.
52. Oily wastewater treatment materials
Ye Xincai and others used sodium carbonate (Na2CO3) and olfactory cetyltrimethylammonium (CTMAB) to modify bentonite. The results show that the degreasing effect of organic modified bentonite is better than that of sodium modified bentonite and purified clay. The saturated adsorption capacity is also much higher than that of purified clay; for oily wastewater with a concentration of 221mg/L, the amount of organic bentonite is 5.0g/L, and the oil removal rate can reach 97%
53. Pesticide wastewater treatment materials
Hu Qiaokai and others studied the adsorption of dimethoate wastewater by acidified and calcined bentonite. The results show that the modification method can significantly improve the sedimentation and filtration performance of bentonite in water, and greatly increase the adsorption capacity of bentonite to dimethoate. The bentonite obtained after acidification with 2mol/L sulfuric acid and calcined at 300°C can adsorb 20.4mg/g of dimethoate. For dimethoate wastewater with a concentration of 60mg/L, when the amount of adsorbent is 17g/L, the removal rate of dimethoate can reach 85%.
54. Mine wastewater treatment materials
In the treatment of mine wastewater, it uses the adsorption performance and ion exchange capacity of bentonite, and has a large specific surface area, which can be combined with other materials to form a mineral composite material. In recent years, the mineral material bentonite-steel slag composite material has become a research hotspot in the treatment of mine wastewater. By mixing bentonite and steel slag into a bentonite-steel slag composite material to treat acid mine wastewater, the waste treatment can be achieved and the cost of mine wastewater treatment can be reduced.
55. Fluoride treatment materials
In order to effectively remove fluoride ions in water and solve the problems of large swelling, difficult solid-liquid separation, and low adsorption performance of powdered bentonite in water treatment applications, Wang Xuezheng and others adopted an aqueous solution polymerization method using bentonite as a raw material and propylene. Amide is a polymerized monomer, and composite bentonite was synthesized. It was found that acrylamide was intercalated and polymerized in bentonite and formed a homogeneous composite with bentonite. When the mass fraction of bentonite is 90%, the removal rate of F- can reach 73.94%, which is higher than the adsorption performance of pure calcium bentonite for F-. At the same time, the composite bentonite after adsorption of F- can be regenerated for multiple cycles of aluminum sulfate aqueous solution, and the regenerated composite bentonite has higher fluorine removal activity than the initial composite bentonite.
56. Radioactive waste treatment materials
Bentonite can be used as a nuclear adsorbent. The adsorption of radionuclides on bentonite effectively prevents their migration during waste disposal; the movement of groundwater in bentonite is very slow, which also slows down the migration of radionuclides in bentonite. In addition, the thermal stability of organic soil can reach 200°C, making it better used in nuclear waste engineering shielding.
57. Air pollution control materials
Bentonite has a large specific surface area and strong adsorption. After simple treatment, it can be used as an adsorption filter material for the adsorption and filtration of odors, poisonous gases and harmful gases NOx, SOx, H2S, etc. For example, Japan and other countries have already used bentonite for air purification patented products, including: using montmorillonite as a matrix to prepare indoor air purifiers, mixing bentonite with calcium hydroxide, alkali-containing and alkaline earth metal chlorates as adsorbents for air purification, Bentonite is mixed with MgO and CaCO3 and dried to make particles as an air sulfur oxide separator. Bentonite and cobalt are calcined at a high temperature above 800°C to make catalysts for the purification of exhaust gas from internal combustion engines.
58. Soil remediation materials
Mixing bentonite in the soil can stimulate the nitrogen fixation of nitrogen-fixing bacteria and promote plant growth. It can also resist the harmful Fusarium subtilis virus. When it enters the soil, various pesticides, fungicides, and herbicides lose their medicinal toxicity. The adsorption capacity of bentonite for lead is 2 to 3 times greater than the adsorption capacity for calcium, and the adsorption effect for chromium is stronger. The clay minerals, organic matter and soil body in the soil can fix the organic pesticides through physical adsorption and chemical adsorption, reducing the migration ability and toxicity of the pesticides.
59. Soil amendment
After being applied to the soil, bentonite can absorb water and expand, which can change the ratio of solid, liquid, and gas in the soil, making the soil structure loose, retaining water, fertilizer, and not polluting the soil environment. This is an extremely effective soil improvement in arid areas. Agent.
60. Yarn size
The purified, modified and modified bentonite has amazing dispersibility, stability and good bonding effect. And it is "similarly compatible" with starch and natural fiber, has a good binding force, and can be used as one of the components of the size in the textile industry.
61. Fabric printing paste
Bentonite has high dispersibility, expansibility and good colloidal stability in water. It is a sol (mineral paste) formed after modification, modification and thickening treatment. At the same time, it has the general characteristics of printing paste (thickening, rheology), suitable for fabric printing paste, so it can be used as a partial substitute for organic paste such as sodium alginate.
62. Dyeing auxiliaries
Organobentonite is mainly used as a dyeing aid for synthetic fiber fabrics. Due to the lack of hydrophilicity of synthetic fiber itself, its wettability is even worse, which results in uneven dyeing of synthetic fibers. Utilizing the double hydrophilicity of organic bentonite, dye and water, the levelness and dyeing rate of dyeing will be improved during the dyeing process. Acrylic yarn is dyed with a dye solution of bentonite added with cetyltrimethylamine bromide, and the dyed yarn is bright, bulky and high in uniformity.
63. Fabric softener
Bentonite is used in liquid and solid washing products. It mainly acts as a fabric softener and thickener. It can absorb dissolved impurities such as ions, while preventing the accumulation of crusts and scum on the surface of the fabric. It has the effect of softening fabrics and enhancing washing. , While reducing production costs.
64. Plasticizer for ceramic raw materials
Bentonite is used as a plasticizer for ceramic raw materials, which can improve the plasticity and compressive strength of the embryo body or glaze, greatly increase the lubricating effect, and greatly enhance the suspension and stability. The finished product has fine porcelain and soft color. The glaze machine is smooth and has good light transmittance.
65. Refractory materials
The clay mainly made of montmorillonite generally has strong water absorption and can absorb 8 times as much water as it is. After absorption, the volume expands 10 to 30 times. Among them, sodium-containing bentonite is called sodium bentonite, which has good adhesion and resistance. High temperature, good performance in refractory production.

Do you now have a deeper understanding of bentonite? Bentonite has a wide range of uses and is closely related to our lives. The bentonite production industry has gradually expanded in recent years. We must choose the right powder grinding machine to produce bentonite. A suitable powder grinding machine can produce the most suitable bentonite with high efficiency and low energy consumption. If the right grinding machine is not selected, it will greatly increase your cost. If you have a need to buy a machine, please contact us immediately, we will arrange professional technicians to connect with you, and provide you with the best solution for free.

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