Acidic Refractory or acid refractory is a kind of refractory material with silica as its main component. Acidic refractory can resist acid slag erosion, but it can easily react to alkaline slag erosion at high temperature environment. Acidic refractory is widely used for coke oven, open hearth regenerator and furnace roof, refractory firing kiln and glass tank furnace in metallurgical industry. If you want to buy acidic refractory for your furnace or kiln, come and contact RS Refractory Company. RS Refractory Materials Company will offer you low price acidic refractory with high quality and good performance.

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Acidic Refractory Definition

Acidic refractory usually refers to refractory material with more than 93% SiO2 content. The main characteristic of acidic refractory is to resist the erosion of acid slag at high temperature, but it is likely to react with alkaline slag. Acidic refractory is mainly made of quartz glass, fused silica re-bonded products, silica bricks and amorphous silicon refractory. Semi siliceous refractory products are generally attributed to this kind. As for clay refractory, it is classified as semi acidic or weakly acidic refractory. In addition, zirconium carbide refractory and silicon carbide refractory are used as special acidic refractory.

Acidic refractory is the refractory material that is not affected by acidic materials at high temperature. But acidic refractory reacts with basic slags easily. Acidic refractories contain alumina, silica zirconia refractories and fire clay bricks refractory.

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Acidic Refractory Classification

According to acid strength, there are mainly: (1) strong acidic silica brick, amorphous silica refractory, quartz glass products, fused silica recombination products; (2) moderately acidic semi-silica refractory and pyrophyllite refractory; (3) weak acid clay refractory. The main property of acidic refractory its strong resistance ability to the corrosion of acid substance (or acid slag) at high temperature, but it tends to react with alkaline substance (or alkaline slag). Zirconium quartz refractory and carbonized silicon refractory as special acidic refractory are also included in this category.

1.Strong acidic refractory refers to siliceous materials with silica content more than 93%, such as silica refractory brick. Strong acidic refractory is used for glass kiln, acid furnace, coke oven, etc.

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2.Semi-acidic refractory contains a lot of silica and alumina refractory. Semi-acidic refractory is one of the refractory materials. The main purpose of semi-acidic refractory is to make semi-silica bricks. In order to alleviate the thermal expansion of silica brick and to compensate the shrinkage and softening properties of clay brick, more clay fired refractory brick was added into quartz.

3.Fire clay brick belongs to weak acid refractory. Fire clay brick is made of refractory clay with 30%~46% content alumina. This brick also has good thermal shock resistance and acid slag resistance. This kind of acidic refractory brick is widely used with large amount of production.

4.Zircon and SiC refractories are also classified as acidic refractories because of SiO2.

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According to the shape of acidic refractory, acid refractory material can also be divided into acidic refractory bricks and monolithic acidic refractory with SiO2 content. Aidic refractory bricks include silica bricks, fire clay bricks and zirconium bricks. While monolithic acidic refractory contains acidic refractory castable, acidic ramming mass, acidic refractory cement, acidic refractory mortar, acidic refractory coating, etc. Every kind of acidic refractory brick has its coresponding monolithic acidic refractory.

Acidic Refractory Uses

Because the properties of acidic refractory are quite different from basic refractory, the acidic refractory uses are also different from that of basic refractory. The anti slag corrosion performance, refractoriness under load, the volume change at high temperature burning and thermal shock resistant ability determines the using temperature of acidic refractory.

Acidic refractory is not resistant to alkaline slag and alkaline flux and is mainly used in coke oven, open hearth regenerator, furnace top, acid furnace, refractory kiln and glass kiln.

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It is of great significance to classify refractory materials according to their acid and alkali properties. We can choose the corresponding refractories according to the acidity and alkalinity of the working environment, which can improve the service life of refractories and reduce production cost.

Differences Between Acidic Refractory And Basic Refractory

The raw material of acidic refractory is silica with SiO2content more than 93%. Acidic refractory can resist the slag erosion and react with alkaline slag. While the basic refractory is on the contrary side. The basic refractory is made of magnesium oxide and calcium oxide with strong alkaline resistance. Basic refractory is mainly used in basic steelmaking furnaces and non-ferrous metal smelting furnaces, and often used in cement industry. The main products of basic refractories are magnesia, magnesia chrome, magnesium olivine, dolomite and limestone refractories. Magnesium, dolomite and limestone refractories are strongly alkaline refractories, while chrome-magnesia, magnesia-chromium, forsterite and spinel-limestone are weakly alkaline refractories.

Acidic Refractory Supplier

RS Kiln Refractory Company is a leading acidic refractory supplier in the world that produces tons of high quality acidic refractory annually and sells acidic refractory to the whole world. Are you going to buy silica brick, fire clay brick or other kinds of acidic refractories? Are you going to buy acidic refractory for your glass kiln, acid furnace or coke oven? Are you going to buy cheap refractory with acid slag corrosion resistance? Contact RS Refractory Company for low price! RS Acidic Refractory Supplier will offer you high quality silica bricks and fire clay bricks.