輕質高鋁磚的特點Features of lightweight high alumina

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    輕質耐火磚是耐火磚產品中的一大組成部分，它和重質耐火磚的區別在于它不直接接觸火焰，多用于窯爐中需要隔熱保溫的環節，起到一定的保溫作用。下面，就讓我們來了解輕質耐火磚中的主流產品輕質高鋁磚。
    輕質高鋁磚又稱高鋁隔熱磚。氧化鋁含量在48%以上、主要由莫來石和玻璃相或剛玉共同組成的輕質耐火材料。
    輕質高鋁磚的體積密度0.4～1.35g/cm3。氣孔率66%～73%，耐壓強度1～8MPa?？篃嵴鹦阅茌^好。國標磚的尺寸是230*114*65mm。
    輕質高鋁磚理化指標：
    從指標圖中可以看到，我廠高鋁輕質磚的體積密度是1.0g/cm3，常溫耐壓強度高于3.5MPa，導熱系數在0.40W/m·k以下，復合國家標準，是優質的耐火產品。
    輕質高鋁磚通常采用高鋁礬土熟料加少量黏土，經磨細后用氣體發生法或泡沫法以泥漿形式澆注、成形，經1300～1500℃燒成。有時也可用工業氧化鋁代替部分礬土熟料。用于砌筑窯爐的內襯和隔熱層，以及無強烈高溫熔融物料侵蝕及沖刷作用的部位。直接與火焰接觸時，表面接觸溫度不得高于1350℃。
    輕質耐火磚和重質耐火磚的區別：輕質磚主要的作用是用來保溫、減少熱量的流失。如：高鋁輕質磚、莫來石保溫磚；而耐火磚主要是用來經受火焰的炙烤。常規輕質磚一般不會直接接觸火焰，而耐火磚一般直接接觸火焰。如高鋁磚；剛玉莫來石磚。
    輕質高鋁磚
    主要區別有以下幾點：
    1、保溫性能。輕質磚的導熱系數一般在0.2-0.4（平均溫度350±25℃）w/m.k，而耐火磚的導熱系數在1.0（平均溫度350±25℃）w/m.k以上，由此可得出保溫磚的保溫性能要比耐火磚的保溫性能好的多。
    2、耐火度。輕質磚的耐火度一般在1400度以下，而重質磚的耐火度在1400度以上。
    3、密度。輕質磚一般都是輕質保溫材料，密度一般在0.8-1.0g/cm3，而耐火磚的密度基本都在2.0g/cm3以上。

    本公司長期出售高鋁磚，粘土磚等，價格合理，質量優，誠實守信、互利共贏。聯系電話：0086-13608670776

Lightweight firebrick is a major component of firebrick products. The difference between it and heavy firebrick lies in that it does not directly contact the flame and is mostly used in the link requiring thermal insulation in kiln and furnace to play a certain role in thermal insulation.Below, let us understand the mainstream of lightweight refractory bricks in lightweight high-alumina bricks.

Lightweight high alumina brick is also called high alumina insulation brick.Alumina content in more than 48%, mainly composed of mullite and glass phase or corundum light refractory.

The volume density of lightweight high-alumina brick is 0.4 ~ 1.35g/cm3.The porosity was 66% ~ 73%, and the compressive strength was 1 ~ 8MPa.Better thermal shock resistance.The size of the national standard brick is 230*114*65mm.

Physical and chemical indexes of light and high alumina brick:

It can be seen from the index chart that the volume density of our factory's high-alumina lightweight brick is 1.0g/cm3, the room temperature compressive strength is higher than 3.5mpa, the thermal conductivity is below 0.40w /m·k, the composite national standard is high quality refractory products.

High quality light aluminum bricks usually adopt high bauxite clinker and a small amount of clay, the fine grinding method or bubble method using gas before and after the pouring and forming in the form of mud, burn into the 1300 ~ 1500 ℃.Sometimes industrial alumina may be used instead of some bauxite clinker.Used for lining and insulating layer of masonry kiln, as well as parts without strong erosion and scour of high temperature molten materials.Direct contact with the flame, the contact surface temperature is not higher than 1350 ℃.

The distinction of light qualitative firebrick and heavy qualitative firebrick: the main function of light qualitative brick is to use heat preservation, reduce the loss of quantity of heat.Such as: high aluminum lightweight brick, mullite insulation brick;And firebricks are mainly used to withstand the fire of roasting.Conventional lightweight bricks generally do not have direct contact with the flame, while refractory bricks generally have direct contact with the flame.Such as high alumina brick;Corundum mullite brick.

Lightweight high alumina brick

The main differences are as follows:

1. Thermal insulation performance.The coefficient of thermal conductivity of light brick generally in 0.2 0.4 (the average temperature of 350 + 25 ℃) w/m.k, and the coefficient of thermal conductivity of refractory brick (average temperature of 350 + 25 ℃) in 1.0 w/m.k above, which can be concluded that thermal insulation brick insulation heat preservation performance is much better than brick.

2. Fire resistance.The fireproof degree of light qualitative brick is in commonly 1400 degrees the following, and the fireproof degree of heavy qualitative brick is in 1400 degrees above.

3. Density.Light brick is light qualitative heat preservation material commonly, density is in commonly 0.8-1.0g/cm3, and the density of firebrick basically is in 2.0g/cm3 above.

Our company sells high alumina brick, clay brick and so on for a long time, the price is reasonable, the quality is superior, honest and trustworthy, mutual benefit and win-win.Contact number: 0086-13608670776

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