Lump Bentonite for Building Industry

Bentonite：

Appearance of bentonite:

When the raw bentonite ore is broken by hand, we can see that the bentonite ore body is dense and blocky, with a grease luster and a good slippery feeling. Due to the depth, region and geographical location of the ore belt and the size of the montmorillonite content, the colors we observe with the naked eye also show many different colors such as red, yellow, green, blue and brown. As a special kind of clay, bentonite has a wide range of uses, and bentonite has many functions.

Let's introduce the five major uses and functions of bentonite:

1. Foundry industry

The largest amount of bentonite in the foundry industry ranks first. According to statistics, the average domestic bentonite consumption in the domestic foundry industry is as high as 1.1 million tons.

In both ordinary casting and precision casting, the support of bentonite is needed to be used as a sand binder to facilitate better modeling of castings. Castings produced by using bentonite have many advantages, such as: good adhesion, good air permeability, physical and chemical stability, less trachoma, low scrap rate, and high surface quality of castings. Practice has proved that in today's rapid development in the new century, bentonite is still an essential ideal modeling material for the production of various castings, and has irreplaceable advantages.

2. Drilling mud

Drilling mud is the second largest user of the bentonite industry, with an annual consumption of at least 600,000 to 700,000 tons of bentonite.

Bentonite is an ideal low-solid-phase drilling slurry material, which has good lubricity, suspension, cohesion and expansion when it encounters water. After fully dissolving bentonite and water according to a certain proportion, we can find that bentonite can present a high-viscosity suspended gel solution, which has good pulping, cohesive, lubricity, suspension and contact properties. transsexual. The main functions of bentonite in drilling mud are: cooling the drill bit, lubricating the drill pipe, returning cuttings, protecting the well wall, and balancing the formation pressure. When drilling encounters various complex geological layers, accidents such as well wall collapse, block drop, and buried drilling are very likely to occur. At this time, high-quality sodium-based bentonite must be used for mud wall protection to prevent all kinds of hole collapse and buried drilling accidents. Reduce losses and improve drilling efficiency.

3. Metallurgical pellets

As the third user of metallurgical pellets in the bentonite industry, according to statistics, the average annual bentonite consumption of steel mills in China is at least 450,000 tons per year.

Metallurgical pellets use a small amount of bentonite in smelting mainly to facilitate the bonding and grasping of iron ore concentrate, and use as a binder for iron ore pellets, which is convenient for the next step of pelletizing, heating, sintering, and finally smelting. The addition amount is: 1%~2% of the iron concentrate powder. The advantages are: bentonite can greatly improve the production capacity of metallurgical pellets in blast furnaces, and is very popular among various steel mills and enterprises. Practice has proved that in the metallurgical pelletizing industry of steel mills, bentonite has been widely used in large quantities. Because of its high stability and adhesion at high temperature, it has become an irreplaceable and cheap raw material, which has greatly improved the quality of the metallurgical industry.

4. Activated clay

Activated clay is the fourth largest user in the bentonite industry, with an annual consumption of 400,000 tons.

According to statistics, there are only about 40 manufacturers of activated clay in our country, with an output of about 420,000 tons per year. Activated clay is a chemical product obtained after high-quality white bentonite is activated by sulfuric acid. High adsorption capacity is a significant feature of activated clay, which is similar to activated carbon, and the advantage is that it is cheaper than activated carbon. Activated clay has a wide range of uses, such as: purification of animal and vegetable oils and various minerals, regeneration of ethanol from waste oil, decolorization, purification and purification of benzene, pesticide suspending agent, fruit juice purification and clarification, and carrier of chemical catalysts, etc.

The granular clay made of activated clay is in the shape of irregular small particles. This kind of small granular activated clay has more specific surface area, and has high particle strength, good adsorption effect, and physical and chemical stability, so it can be better used in many In various industries, such as the purification of aromatic hydrocarbons in the petrochemical industry, sewage treatment, the refining of aviation kerosene, it can also be used for the refining of lubricating oil, base oil, diesel oil, etc. To remove residual olefins, gums, asphalt, alkalinity impurities such as nitrides in oil products.

5. Desiccant

The export volume of desiccant produced by domestic bentonite is relatively large, and the desiccant is the fifth largest user of the bentonite industry.

Since the safety of ordinary desiccants has always been the focus of attention, hurting incidents occur from time to time and cannot be solved. Later, the bentonite desiccant produced by people using bentonite has better safety, moisture absorption and high efficiency than other desiccants. Deodorizing ability. Compared with other chemical desiccants, the results confirm that the desiccant produced by using bentonite is not only low in price, but also has more advantages, such as non-toxic, environmentally friendly, odorless, non-polluting, safe, fast in adsorption, and low in production cost Etc. At present, the scope of application of bentonite desiccant covers: food packaging, medical care, electronic products, optical instruments and many other industries.