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Yingkou Hexiang Refractories Co., Ltd.

Address: Gaozhuang Village, Nanlou Development Zone, Dashiqiao City

Gneral Manager: Zou Xiang

Mobile phone: 18041718881

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You have to know little common sense about refractory materials!

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You have to know little common sense about refractory materials!

Release date:2015-05-13 00:00 source: Click:

Common sense of refractory data you have to know

1. What is refractory material?

Refractory materials usually refer to inorganic non-metallic materials with refractoriness above 1580 oC. They contain natural ores and commodities made by certain technology according to certain intentions. They have certain high temperature mechanical functions and outstanding volume stability, and are necessary information for various high temperature equipment.

2. How to classify the refractory data?

There are many ways to classify refractory data, but the first one is according to chemical composition: it can be divided into acidity, alkalinity and neutrality; according to refractory degree, it can be divided into four categories: high-grade refractory data (1580-1770 degrees C), high-grade refractory data (1770-2000 degrees C), super refractory data (more than 2000 degrees C) and super refractory data (more than 3000 degrees C); according to processing technology, it can be divided into firing products, super refractory data and super refractory data (more than 3000 degrees C). Melt-casting products and non-fired products can be divided into blast furnace, open hearth, converter, continuous casting, glass kiln and cement kiln according to their uses; according to appearance, they can be divided into refractory products, refractory mud and non-shaped refractory materials; according to shape and scale, they can be divided into standard, general, special, special and super-special products; according to forming technology, they can be divided into natural rocks. Cutting saw, slurry casting, plastic forming, semi-dry forming and shaking, tamping, melting and casting products; According to Chemical-Mineral composition, they can be divided into aluminosilicate (clay brick, high-alumina brick, semi-silica brick) siliceous (silica brick, fused quartz fired products) magnesia (magnesia brick, magnesia-chrome brick); carbon (carbon brick, graphite brick) dolomite, zircon, especially refractory. Material products (high purity oxide products, refractory compound products and high temperature composite materials).

3. What are the commonly used refractory materials?

The commonly used refractory materials are silica brick, semi-silica brick, clay brick, high alumina brick, magnesia brick, etc.

Special data often used include AZS bricks, corundum bricks, magnesia-chrome bricks, silicon carbide bricks, silicon nitride bricks, nitrides, silicides, sulfides, borides, carbides and other non-oxide refractory materials; calcium oxide, chromium oxide, alumina, magnesium oxide, beryllium oxide and other refractory materials.

Diatomite products, asbestos products and insulation plates are often used for heat insulation and refractory materials.

Amorphous refractory materials are often used, such as refractory materials, ramming materials, refractory castables, refractory plastics, refractory mud, refractory gunning materials, refractory projectiles, refractory coatings, light refractory castables, gun mud, etc.

4. What are the categories of refractory products?

1. High Aluminum Products

2. Mullite products

3. Clay products

4. Silicon Products

5. Magnesium products

6. Carbon-containing products

7. Zirconium-containing products

8. Heat insulation products

What are the physical functions of refractory data?

The physical functions of refractory materials include layout function, thermal function, mechanical function, application function and working function.

The layout functions of refractory materials include porosity, bulk density, water absorption, air permeability and pore size distribution.

The thermal functions of refractory data include thermal conductivity, thermal expansion coefficient, specific heat, heat capacity, thermal conductivity and thermal emissivity.

The mechanical functions of refractory data include compressive strength, tensile strength, flexural strength, torsional strength, shear strength, impact strength, wear resistance, creep, bond strength and elastic modulus.

The application functions of refractory data include refractoriness, load softening temperature, reburning line change, thermal shock resistance, slag resistance, acid resistance, alkali resistance, hydration resistance, CO corrosion resistance, conductivity, oxidation resistance, etc.

The workability of refractory data includes consistency, collapse, mobility, plasticity, cohesion, resilience, agglomeration, hardening and so on.

6. What is the special refractory material? How is it different from traditional ceramic and refractory materials?

Special refractory materials are new inorganic non-metallic materials developed on the basis of traditional ceramics and common refractory materials. It has the following characteristics: high melting point, high purity, excellent chemical stability and thermal shock stability.

Special refractory materials include high melting point oxides and refractory compounds, cermets, high temperature coatings, high temperature fibers and reinforcing materials derived therefrom.

Compared with traditional ceramics and refractory materials, special refractory materials have high purity, high melting point, good electrical, thermal, mechanical and chemical functions, so they can be used in high, precise and cutting-edge science and technology. In manufacturing technology, materials are usually pre-fired. In addition to traditional methods, new technologies such as gas accumulation and hot pressing are also used. The forming material is micron powder. It needs to be fired at very high temperature and in maintenance atmosphere. It can be made into thin products (translucent).

7. What is the unshaped refractory material? What are its characteristics?

The amorphous refractory data is the refractory data directly used without forming and firing, which is composed of granular and powdery materials with reasonable gradation and linking agent.

8. How to classify the unshaped refractory data?

The types of unshaped refractory data are complex and can be classified as follows:

Classified according to technical characteristics: castable, plastics, ramming material, spray material, projectile, cement, coating material.

According to raw materials: silica, clay, high alumina, magnesium, dolomite, chromium, chromium, etc.

According to the types of linking agents: water glass linkages, aluminate cement linkages, silicate linkages, Tar-Asphalt linkages, phenolic resin linkages, etc.

Related tags:轻烧氧化镁

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