Metal Silica Fume used as refractory material

Metal Silica Fume is elemental silicon by industrial purification, which is mainly for the production of organic silicon, the preparation of high purity semiconductor materials as well as preparation of special-purpose alloys. China is the world's leading silicon metal origin. Processed by washing, selection, grinding, Silicon metal is made into 200 mesh, 320 fine fume. Depending on the content, metal silica can be divided into 90%, 95%, 97%, 98%, and other quality standards with low prices. In the production of refractory process, users can choose different Silicon metal powder sizes according to the requirements of refractory products, thereby greatly reducing the cost of refractory products.

Metal Silica Fume

1. Industrial silica fume is extensively applied to refractory and powder metallurgy industry in order to enhance high-temperature resistance, wear resistance and inoxidizability. The product is comprehensively used for steel furnace, kiln and kiln furniture.

2. In the organ silicone chemical industry, industrial silica fume is the basic material of organ silicone polymer synthesis, such as the production of silicon monomer, silicone oil and silicone rubber preservative, increasing high-temperature resistance, electrical insulating property, anti-corrosion property, water resisting property and other characteristics of products.

3. Monocrystalline silicon is made from industrial silica fume and then processed into silicon wafer which is the essential raw material of integrated circuit and electronic components.

4. In the metallurgy casting industry, as the additive of uniron-base alloy and alloying agent of silicon steel, industrial silica fume increases the hardenability of steel. Also, it can be used as reducing agent of some metals for new type ceramal and other products.

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Yellow Dextrin used as Refractory Material

There are usually three categories: white dextrin, yellow dextrin and British gum or Britain gum. The difference between them lies in the pretreatment of starch and heat conditions for different applications.

yellow dextrin

Yellow dextrin is widely used for grinding tool and abrasives, foundry casting, refractory materials, rubber products and other industries, particularly abrasive and refractory materials, refractory charge, light brick, shaped bricks and others, having an superb effect on the early setting of its products. It matches in appropriate proportion and mix well, which plays an excellent role in collapse preventing and edges and corners protecting.

Yellow Dextrin Parameters:

Fineness (100 mesh pass) ≥98%
Acidity ≤40%
Moisture ≤10%
Solubility ≥95%
Adhesion ≥1.5kg / cm2

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Hercynite - refractory material

Hercynite, a kind of fused-type Hercynite with high quality, which is synthesized by aluminium oxide and iron-containing compound features environmental protection, no pollution, excellent thermal shock resistance and ability to alkaline slag erosion resistance. Hercynite stone can be used to manufacture spinel skateboards, nozzle brick, ladle castable, induction furnace lining, Hercynite bricks and other fields.

Hercynite Fused for Cement Kiln:

Compared with traditional brick spinel, magnesium oxide - aluminum ferrite spinel brick has excellent structure flexibility, low thermal expansion, low heat conductivity and good alkali salt erosion ability. Especially for large-scale rotary kiln (the maximum daily output 6 800t), the life of hercynite fused brick can be up to 17 to 18 months. After using, the brick Chemical and microstructural analysis results showed that even at extremely high volatile, large thermal mechanical stress and rotary kiln operating conditions, magnesia - hercynite brick erosion rate remains very low.

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Indicators:
                            
Al2O3 54-58%
SiO2 ≤1.5%
Fe2O3 39-44%
CaO ≤0.5%
The physical properties of porosity% ≤5.0%
Bulk density g / cm3 ≥ 3.90

Hercynite,

Refractory Material-Refractory Castable from China

Product Description:

Refractory castable belongs to stereotypes. It is a mixture of powdered material composed of a variety of aggregate particles or aggregates and one or more adhesive agents. It must be stirred with one or more kind of liquid when someone uses, and has strong liquidity and plasticity.

Refractory Castable Types:

It is mainly divided according to porosity, binders and assortment of aggregate.

According to porosity, it is divided into dense refractory castable and fire-resistant insulation refractory castable which has porosity of less than 45%. 

According to binders, it is divided into hydrsulic bonding , chemical bonding, cohesion binding refractory castable.

Refractory castable

According to refractory aggregate, it is divided into clay aggregate (Al2O3 30% ~ 45%), high alumina aggregate (Al2O3% 26ge; 45%), siliceous aggregates (SiO2% 26ge; 85%, Al2O3% 26lt; 10 %), alkaline aggregate (with magnesia, dolomite, etc.), special aggregate (carbon, carbides, spinel, zircon, nitrides, etc.) and insulation aggregate (perlite, vermiculite stone, ceramic, floating beads, light brick sand, porous clinker, alumina hollow ball,etc).

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High Aluminum Powder used as refractory material

Description:

High aluminum powder is white powdered product with uniform size, easy dispersion, and good chemical stability. It has moderate shrink properties in high temperature, good sintering properties, high conversion rate and low sodium content.

High aluminum powder

Features and Application:

High aluminum powder is a basic raw material for the production of heat, wear and corrosion-resistant products such as high alumina refractories, high-strength ceramics, automobile spark plugs, advanced abrasive materials. It has a high melting point, good thermal stability, high hardness, good wear resistance, high mechanical strength, good electrical insulation, excellent corrosion resistance.

High aluminum powder is widely used for stereotypes, not stereotypes refractories, refractory castable binder, abrasive wear, high purity refractory fibers, specialty ceramics, electronic ceramics, structural ceramic, stainless steel, mirror-polished granite and other decorative materials.

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Silicon Carbide used as refractory material

Product Description:

Silicon carbide (SiC) is made from quartz sand, petroleum coke (or coal), wood (it need to add salt for the production of green silicon carbide) and other raw materials. Silicon carbide is also known as Moissanite. Silicon carbide is the most widely used refractory in C, N, B and other high-tech non-oxide refractory raw material, which can be called emery or refractory sand.

Silicon carbide

Now China's industrial production silicon carbide is divided into black silicon carbide and green silicon carbide, Both are hexagonal crystals with specific gravity of 3.20 - 3.25, the hard silicon carbide is of 2840 ~ 3320kg / mm2.

SiC Mohs hardness: 9.2, Vickers hardness of microscopic density: 3000--3300kg / mm2, Knoop hardness: 2670--2815kg / mm, microscopic hardness: 3300kg / mm3, which is higher than that of corundum abrasive and second to that of diamond, cubic boron nitride and boron carbide. Density is generally considered to be 3.20g / mm3, natural bulk density of silicon carbide abrasive between 1.2--1.6g / mm3, specific gravity: 3.20 3.25. Black silicon carbide takes petroleum coke and silica as the main raw material and salt as additive and processed by high temperature resistance furnace smelting. Compared with green silicon carbide, black silicon carbide has lower purity, hardness, friability.

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Mullite used as refractory material

Product Description:

Mullite is collectively referred to minerals composed of a series of aluminum silicate minerals, which is the only stable binary compounds of Al2O3 - SiO2 system. So it is a rare mineral.

Mullite

Application:

Mullite can be employed in the field of refractories, ceramics, metallurgy, casting, electronics, with features of high temperature, high strength thermal conductivity, good energy-saving effect. It is suitable for medium petroleum cracking furnace, metallurgy stove, ceramics roller kiln, tunnel kiln, porcelain drawer kiln, crucible furnace and all kinds of electric furnace as lining. It can direct contact with the flame.

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