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Attention should be paid to the construction of castable blocks

Attention should be paid to the construction of castable blocks

Castable, also known as refractory castable, is a mixture of granular and powdery materials made from refractory materials and binders. It is used after a certain degree of mixing, so that it tends to uniform, and has a certain flow construction, but also has a suitable construction time and hardening time, if it is dried by pouring way, it is called amorphous refractory. The castable can be used without sintering process, and the castable body should be baked when used. Compared with firebrick, it is more suitable for complex, special-shaped structure construction, with simple production process (because there is no fixed size requirements, save the pressing and firing process), easy to mechanized construction, construction speed and other characteristics, in some thermal equipment use effect is better than firebrick.

09

2023

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01

The establishment meeting of the Joint Working Group on hydrogen metallurgy standards was held

The establishment meeting of the Joint Working Group on hydrogen metallurgy standards was held

Yu Yong, President of the World Iron and Steel Development Institute, Party Secretary and Chairman of Hesteel Group, is the leader of the Joint working Group on hydrogen metallurgical standards

09

2023

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01

Rapid repair technology of blast furnace iron opening

Rapid repair technology of blast furnace iron opening

Blast furnace operation to the middle and late stage of service, hearth, hearth or tuyere area, there will be local temperature, gas channeling, broken iron and so on. In order to maintain production, the iron factory will take measures such as hot spraying, grouting on cold or hot surface of cooling wall, improving cooling intensity, hot repair of iron mouth, etc., and then stop the furnace for maintenance of the nodes to be repaired. These rapid maintenance methods not only can effectively prolong the operation life of blast furnace, but also are widely used because of the continuous progress of its materials and repair technology. Among them, the fast repair technology of blast furnace iron mouth, in a very short maintenance time, using hot pouring way, fast repair of iron mouth area lining, has obtained a good application effect.

09

2023

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01

How to prevent curing castable cracking

How to prevent curing castable cracking

A large crack appeared on the wall of a heating furnace after construction. The furnace wall uses low cement castable in accordance with 1.5×1.5m block pouring construction, pouring thickness of 230mm, after maintenance 12 hours after the construction of the mold, the material has hardened, but the strength is not high. The upper part of the furnace wall has a "cut" in the department. Crack size: 500mm high from top to bottom, 5mm to 1mm wide to narrow. The construction adopts chute feeding, chute width 100mm; The castable has good vibrational flow, poor artesian flow and large flow loss. After the crack occurs, the construction personnel take longer vibration time in order to discharge the air more fully; There are furnaces working around the construction site.

09

2023

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01

What is the significance of wet injection tracking in blast furnace lining

What is the significance of wet injection tracking in blast furnace lining

The wet injection technology of blast furnace lining can repair a 5500m3 blast furnace lining in a very short time (48h), and the service life can reach more than 1.5 years. This rapid maintenance mode has been fully recognized by the vast majority of blast furnace users, and plays a huge role in China's green ironmaking technology.

09

2023

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01

New technology of all-round heat transfer supplement for converter lining

New technology of all-round heat transfer supplement for converter lining

The traditional converter carbon-based hot state filling material generally contains more than 10% asphalt/resin, which is carried out by the construction personnel during use. The material is put into the furnace to be repaired by hand. Under the action of high temperature, the asphalt and other organic matter soften and liquify, giving the material good bonding property and certain flow performance, so that the filling material can be bonded and paved in the position to be repaired. And form solid carbon bond, achieve the purpose of repairing furnace lining.

09

2023

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01

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