Product characteristics and classification of mullite insulation brick

The mullite insulation brick is a high alumina refractory material mainly composed of mullite (3Al2O3·2SiO2). Generally, the alumina content is between 65% and 75%. In addition to mullite, the mineral composition contains a small amount of glass phase and cristobalite, and a higher amount of alumina also contains a small amount of corundum. The mullite insulation brick can be directly used for lining of high temperature kiln, and has been widely used in the lining of shuttle kiln, roller kiln, glass and petrochemical kiln.

First, the product characteristics of mullite insulation brick:

1. Low thermal conductivity and good thermal insulation effect;

2. The mullite insulation brick has low heat fusion. Due to the low thermal conductivity, the mullite series of lightweight thermal insulation bricks accumulate little heat energy, and the energy saving effect is obvious in the intermittent operation;

3, low impurity content has a very low oxide content such as iron alloy alkali metal, therefore, high refractoriness; higher aluminum content to maintain good performance under reducing atmosphere;

4, mullite insulation bricks have high thermal compressive strength;

5, the appearance of the size is accurate, speed up the masonry, reduce the amount of refractory mud, to ensure the strength and stability of the masonry, thereby extending the life of the lining;

6, mullite insulation brick can be processed into a special shape. To reduce the number of bricks and masonry.

Second, the classification of mullite insulation brick:

Mullite insulation bricks are mainly divided into light and heavy mullite bricks according to their density. According to the different temperature, they are mainly divided into: 1350 mullite insulation bricks, 1450 mullite insulation bricks, 1550 mullite bricks, etc. .

The performance and application of mullite insulation bricks: high refractoriness, up to 1790 °C. The load softening start temperature is 1600 to 1700 °C. Normal temperature compressive strength is 70 to 260 MPa. Good thermal shock resistance. There are two kinds of sintered mullite bricks and electric fused mullite bricks. The sintered mullite brick is made of high alumina bauxite clinker as a main raw material, and a small amount of clay or raw bauxite is added as a binder, which is formed by molding and firing. The electric melting mullite brick is made of high alumina, industrial alumina and refractory clay, and is added with charcoal or coke fine particles as a reducing agent, and is formed by reduction electrofusion after molding. The crystal of fused mullite is larger than sintered mullite, and the thermal shock resistance is better than that of sintered products. Their high temperature performance depends mainly on the alumina content and the uniformity of the mullite phase and glass distribution. Mainly used in hot stove top, blast furnace body and furnace bottom, glass furnace regenerator, ceramic sintering kiln, oil cracking system dead angle lining.

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Henan hongtai kiln refractory co., LTD. Is well aware that there are thousands of demands from customers, which can be summarized in four aspects: reliable quality, timely delivery, reasonable price and considerate service.The company will continue to adhere to the corporate spirit of "contributing to society and serving customers" and the business philosophy of "mutual benefit, win-win, integrity, efficiency, preciseness and responsibility".Our company is willing to develop a wide range of technical exchanges with colleges and universities and colleagues from all walks of life at home and abroad in a flexible and diversified way.

Henan hongtai kiln refractory co., LTD. Main products are high alumina brick, clay brick, fused zirconium corundum brick, fireproof ball lightweight insulation brick, wear-resistant pouring material, corundum pouring material, low cement high strength pouring material, impermeable material, self-flowing material, plastic material, and various types of refractory materials.For different industries, the cement industry with anti-flaking high-alumina bricks, alkali resistant bricks, phosphate bricks;Boiler industry USES all kinds of brand wear-resisting brick, corundum brick, mullite brick and other finalizing materials.The company insists on "product quality is the life, enterprise integrity is the foundation", in the fierce market competition, won many users' trust and praise.The products are sold all over the country, as far as Vietnam, India, Korea, Pakistan, kazakhstan, Iran and other southeast Asian countries and regions.

Henan hongtai kiln refractory co., LTD. : "quality first, reputation first, customer first: it is our aim."Scientific management, strong technical force, perfect testing means, advanced technological equipment and stable product quality are the guarantee of quality service.Henan hongtai kiln refractories co., LTD sincerely hopes to cooperate with you hand in hand and in good faith.