The specific uses of fumed silica and what are the uses of white carbon black

Thickening, thixotropy. Prevents settling and facilitates flow. Reinforcement. Wait a minute. The purpose is also different in different products.

It imparts viscosity and shake deterioration to liquid resin. Gives fluidity to powdered materials and prevents consolidation. I give rubber, elastomer reinforcing properties.

Let me tell you, it's used to make money.

Due to a series of advantages of silica products, it can be widely used in many fields.

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. At the same time, silica has super adhesion, tear resistance and heat resistance and anti-aging properties, 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. Agricultural chemicals.

In agricultural chemicals, such as pesticides, high-efficiency spraying fertilizers, etc., silica is used as a carrier or diluent, disintegrant, and the use of disintegrant in water-dispersible granules WDG can improve the suspension rate, and it is recommended to use the content of about 10%. It retains long-lasting potency due to its ultra-high surface area, high adsorption, easy suspension, good affinity and chemical stability. Even in rain, washdown, and hot conditions, it remains unchanged for a long time.

Introduction to silica:

The general term for white powdered X-ray amorphous silicic acid and silicate products mainly refers to precipitated silica, fumed silica and ultra-fine silica gels, as well as powdered synthetic aluminum silicate and calcium silicate. Silica is a porous substance, and its composition can be expressed by SiO2·NH2O, where NH2O exists in the form of a surface hydroxyl group.

Soluble in caustic and hydrofluoric acid, insoluble in water, solvents and acids (except hydrofluoric acid). High temperature resistance, non-combustible, tasteless, odorless, with good electrical insulation.

Silica is a silica powder that acts similarly to carbon black and is generally used as a structural reinforcement and performance improvement for rubber.

White carbon black is silica powder, and the coarser white carbon black is generally not strong, filling, etc., and it is cheap. Nano white carbon black, also known as fumed white carbon black, has a particle size of only a few to a dozen nanometers, and has the effects of thickening and anti-precipitation; There is another type of precipitation white carbon black, which has a particle size of only a few microns, which can play a role in extinction.

In addition to being used in rubber products, silica is also widely used in paints, inks, feed, pesticides, fire extinguishing agents, papermaking and other industries.

Summary. Fumed silica is generally free of iron.

Fumed silica is generally free of iron.

I'm sorry I don't understand, but can you elaborate on that?

Fumed silica is a white, low-density material, which has a high specific surface area and high activity, and is widely used in the fields of rubber trapped beam glue, printing ink, magnetic recording materials, etc. Milica is usually an inorganic oxide that does not contain organic compounds or carbon, and therefore does not contain iron. However, the feedstock and process parameters in the production process may affect the quality and chemical composition of fumed silica, including the content of iron ions.

Therefore, if there is contamination with iron and other impurities during production and use, fumed silica may contain iron.

In order to solve the above problem, the invention provides a resource treatment process for silica production wastewater, which comprises the following steps: S1, the wastewater is transferred to the wastewater ** pool, a buffer is added to the wastewater, and the pH value of the wastewater is adjusted to the middle; S2. Discharge the pretreated wastewater into the anaerobic aerobic treatment system to reduce the COD to less than 200mg ml; S3, pass into the sedimentation tank and stand for 24h-48h, and separate the supernatant and precipitation; S4. The supernatant is filtered by plate and frame filter press equipment to obtain filter cake and filtrate; S5. Merge the filter cake and the precipitate, wash it with water, and dry it to obtain silica; S6. The supernatant, filtrate and washing solution are combined, entered into the evaporation tank, heated and concentrated, and the concentrate is obtained; S7. The concentrate is filtered by nanofiltration membrane to obtain a secondary concentrate and permeate; S8. The permeate is transferred to the wastewater ** pool; S9. The secondary concentrate is heated and pressurized to obtain a saturated slurry; s10. The saturated slurry was transferred to the flash chamber, depressurized, cooled, and flashed to obtain sodium sulfate crystals; S11. Transfer the steam generated in S6 and S10 to the heat exchanger, ** waste heat, and the generated condensate.

Silica is an amorphous carbon powder, which is the most active of a variety of carbon powders, has good surface activity, excellent adsorption properties, and can effectively remove ozone, chlorine and fluorinated organic compounds. Therefore, silica is widely used in water treatment, especially in peroxides.

Silica can be applied to ozone treatment of water and can help degrade organic matter in water bodies. It can effectively remove organic pollutants in the water body, including aromatic amino acids, aldehydes, benzene substances, etc., and can effectively reduce the flickering phenomenon and algae proliferation. In addition, silica can also be used to reduce hydrogen peroxide in water, thereby effectively inhibiting microbial growth, thereby eliminating harmful substances in the water.

Due to the good surface activity of silica, which can effectively adsorb organic pollutants in water and effectively reduce scintillation and algae proliferation in water bodies, the application of silica in peroxide water treatment is becoming more and more widespread. Silica can effectively adsorb hydrogen peroxide in water, thereby inhibiting the growth of microorganisms, thus achieving the effect of purifying water. In addition, silica can also effectively remove organic open cavity codes in water bodies, thereby reducing harmful substances in water bodies, thereby protecting the water environment.

Silica is a general term for white powdered X-ray amorphous silicic acid and silicate products, mainly referring to precipitated silica, fumed silica, ultrafine silica gel and aerogel, as well as powdered synthetic aluminum silicate and calcium silicate.

The main manufacturers are as follows:

1, Cabot Blue Star, 20,000 tons per year;

2. Guangzhou Jibisheng Technology, Leshan Factory, 20,000 tons per year;

3. Ningxia Shizuishan 1000 tons per year;

4. Chongqing Wanzhou Industrial Park and Chongqing Guangwang invested 10,000 tons per year;

5. 10,000 tons per year of Wengfu Group;

6. Tangshan Sanfu Silicon Industry 6000 tons per year;

7. Wacker Chemie Zhangjiagang 5000 tons per year.

There are not many domestic manufacturers of fumed silica, and the output is not very large. As far as I know, some of the production in Jihua in the Northeast seems to be in Shanghai, but I forgot the name, you can search for it on the Internet.