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Contact: Shen Taisheng

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Site: Anshan Iron and steel plant

Office address: Xi min, Tiexi District, Anshan, Liaoning

No. 111 Sheng Lu


Section 1: furnaces for galvanizing furnaces

Current position: Home >> technical information >> Section 1: furnaces for galvanizing furnaces

The material of hot-dip galvanizing furnace is the same as that of most industrial heating furnaces.

1. high alumina brick

High alumina brick contains Al2O3 above 58% (mass fraction). It has the advantages of high refractoriness, high temperature structural strength, high density and good chemical stability, but the price is high. It is suitable for direct contact with the temperature often higher than 1000 degree flame.

2. common clay firebrick

The composition (mass fraction) of ordinary clay refractory brick is: Al2O3 30%~40%, SiO2 50%~65%, impurities 5%~7%, bulk density 2.1~2.2g/m3. Its high temperature performance is slightly worse than that of high alumina brick, but its price is cheaper and it is widely used. It is suitable for brick walls such as wall body, partition wall and furnace bottom at temperatures of 500~1000.

3. lightweight fireclay brick

The composition of lightweight refractory clay brick is basically the same as that of ordinary refractory clay brick, the volume density is 0.4-1.3 g/cm 3, mainly characterized by many pores, light weight and good insulation performance. Because the pore volume is small and the distribution is uniform, the lightweight fireclay brick still has certain compressive strength. The lower the density of bricks, the better the thermal insulation performance, but the lower the strength. The furnace wall is usually composed of light refractory brick and ordinary refractory brick. There are also successful examples of using high strength light refractory brick to build the furnace wall, but we should pay attention to whether the refractory brick can meet the requirements of long-term high temperature operation.

4. red brick

Red brick is sintered ordinary clay brick, clay, shale, coal mine stone, fly ash as the main raw material, baked from. It is characterized by good compressive strength, but not high temperature resistance, insulation performance is worse than light refractory brick, cheap price. It can only be used for hearth and outer wall and other parts of the furnace body with temperature below 500 degrees Celsius and drying wall.

5. aluminum silicate fiber

Aluminum silicate fibers contain Al2O3% ~ 54% (mass fraction), SiO2 47% ~ 53% (mass fraction), and other oxides. It is a refractory and thermal insulation material. The utility model has the advantages of light weight, high temperature resistance, good thermal stability, low thermal conductivity, small specific heat and mechanical vibration resistance, and the service temperature can be as high as 1300 C. Products include fiber cotton, fiber felt and molded products. Aluminosilicate fiber felt is widely used. The higher the density, the better the fire resistance and thermal insulation performance.

6. refractory mud

Refractory cement includes ordinary refractory cement and high-alumina refractory cement, the latter is more refractory, mainly used for hot-dip galvanizing furnace brick masonry, general water into the slurry can be used, without adding binder.

7. refractory concrete

Refractory concrete (also known as refractory castable) is made of refractory aggregate, powder, binder, binder in a certain proportion, by mixing, forming, curing and baking, the service temperature is above 1000 C. The commonly used proportions (mass fraction) are roughly: coarse and fine aggregate (high alumina clinker) 70%, fine powder (high alumina clinker powder 10%, refractory clay 5%), binder (low calcium aluminate cement 400 or higher) 15%; mixing process gradually add appropriate amount of water (about 10% of the composition), until all refractories are uniform. After forming, the forming construction can be carried out, and the special-shaped refractory components and the firebrick can be prefabricated.

8. steel

Various common carbon structural steel profiles and plates can be used to manufacture and strengthen the whole furnace shell and frame. The steel columns directly supporting the zinc pot should be heat-resistant stainless steel with high temperature resistance and high temperature creep resistance.