How to distinguish refractory refractoriness according to their raw material

Refractory material is essential for industrial furnace lining materials, in the progress of science and technology, furnace generation upgrading, resulting in the production process of refractory brick also has been greatly improved, and these promotion focus on refractoriness, refractoriness, slag resistance, spalling resistance, at the same time, types and applications refractory materials also have multiple orientation change, different refractory, different materials, refractory material refractoriness is generally determined by the material.

    1. clay brick: 1610 ~ 1750 degrees centigrade
    2. silica brick , 690 to 1730 degrees centigrade 
    3. crystalline silica: 1730 ~ 1770 degrees centigrade
    4. hard clay: 1750 ~ 1770 degrees centigrade
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The reasons that the damage of ladle upper nozzle and its reventive measures

Ladle nozzle is widely used in steel plant.

1. The reasons that the damage of ladle upper nozzle
1) Under the scouring and erosion of liquid steel and steel slag, the slag erosion will occur under wrong operation process.
2) Mechanical damage during installation process.
2. To prevent the damages of refractory material sliding gate nozzle system, measures should be taken as below:

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The reasons that the damage of ladle upper nozzle and its reventive measures

Ladle Nozzle is made from corundum, bauxite, flake graphite, antioxidant and phenolic resin formed on heavy duty presses in harden steel or carbide die by using white fused alumina. To obtain maximum packing density, nozzles are fired at extremely high temperature in order to increase corrosion resistance to metal and slag the fired nozzles are further processed.

1. The reasons that the damage of ladle upper nozzle
1) Under the scouring and erosion of liquid steel and steel slag, the slag erosion will occur under wrong operation process.
2) Mechanical damage during installation process.

2. To prevent the damages of refractory material sliding gate nozzle system, measures should be taken as below:
1) Use better raw material with high corrosion and erosion resistantance to make the upper nozzle, such as the corundum quality upper nozzle.
2) Choose to use products with high mechanical strength.
3) Note the operations of ladle casting process, to avoid the discharge of slag.

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Magnesia brick thermal stability and strong points in China

Magnesia carbon brick series used for the electric furnace are made by adoption of fused magnetite, high-purity magnesium sand and graphite as principal raw material, through high-pressure molding and low-temperature treatment. This product is mainly used for electric furnace lining, which enjoys advantages including high temperature resistance strength, corrosion and spalling resistance. According to the smelting conditions and the kind of smelting steel, different brands magnesia carbon bricks are available. Magnesia-carbon bricks are resin bonded bricks containing high-purity fused and or sintered magnesia and flake graphite as their main ingredients.

Advantages of fired magnesia chrome bricks:
Chrome ore and magnesia carbon brick magnesite-chrome brick mill Compact fitted after a total production of fine powder, coarse granule combined with brick and magnesite, are effective measures to eliminate loose effect. In this way made of magnesia-chrome brick, compared with ordinary magnesia-chrome brick, bricks of low porosity and compressive strength, refractories and bending strength are higher. With the chrome ore and magnesia carbon bricks properties powder compact, high temperatures, calcination of magnesite-chrome brick made of synthetic magnesia-chrome sand, slag resistance and high temperature strength than other magnesite-chrome brick good.

Poor thermal stability of mgo brick supplier:
Magnesia brick can only take water-2-3. Expanded the most magnesia bricks in refractory, low coefficient of linear expansion. So when the magnesia brick oven, you want to have plenty of expansion joints. dration of magnesia brick: magnesia brick prolonged under wet condition can slowly drate, magnesia brick strength greatly reduced, so you must pay firebrick refractory sale attention to moisture when stored magnesia brick.

Henan Xinmi Changxing Refractory material Co., Ltd. our product portfolio covers shaped products such as refractory material, refractory brick, refractory castable, refractory nozzle, ceramic fiber,slide gate, etc;

Introduction to the level classification of the Ceramic proppant

Refractories Ceramic proppant is used for oil deposit, which can improve oil output evidently. When putting in the gap of rock formation, which can show high diversion quality and increase oil output.
According to different raw material , there are several different level products:

1, Bauxite ceramic proppant is made from high quality bauxite and coal ash, which holds high refractoriness, high pressure reisistance and strong diversion. Bauxite ceramic proppant is environment friendly product, which is the most popular proppant in the world.
2, Fly ash ceramic proppant is made from solid rejected material and then mixed with water and cementitious matter, whose size is more than 5mm.
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