Cooling wall with pre-coated slag crust

A cooling wall and slag skin technology, which is applied in the direction of cooling devices, etc., to achieve the effects of improving thermal conductivity, improving fire resistance, and reducing heat dissipation

Active Publication Date: 2014-03-26
北京联合荣大工程材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the inlaid refractory material is damaged or the gunning material is damaged, only a layer of slag can be attached to the stave to insulate and protect the stave.

Method used

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  • Cooling wall with pre-coated slag crust

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Embodiment Construction

[0025] Refractory material ingredients: by weight, 30 parts of bauxite powder, 50 parts of corundum powder, 50 parts of silicon carbide powder, 10 parts of silicon micropowder, 15 parts of alumina micropowder, 15 parts of calcium aluminate cement, and 2 parts of water reducing agent.

[0026] The calcium silicate powder has 15 parts by weight.

[0027] Add the above powder into tap water and stir evenly to form a slurry with good fluidity.

[0028] Prepare a copper wall with a dovetail groove, according to the designed slag thickness of 150mm (not including the depth of the dovetail groove), use the copper stave as a side formwork, and support the mold. Spread steel fibers in the mold, carefully spread to ensure that the volume of steel fibers accounts for 15% of the total space volume in the mold.

[0029] Inject the above-mentioned stirred mud into the mold filled with steel fibers.

[0030] Cooperate with the vibration of the mold to ensure that the entire steel fiber gap...

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Abstract

The invention relates to a cooling wall with a pre-coated slag crust. The cooling wall comprises a cooling water pipe, a cooling wall metal body and a pre-coated slag crust material covering the inner wall of the metal cooling wall, and is characterized in that: the cooling wall metal body can be a cast iron cooling wall, cast steel cooling wall or copper cooling wall; the pre-coated slag crust material is an artificially synthesized slag crust material and is prepared from a refractory material, calcium silicate powder and metal steel fibers in a certain ratio; and the steel fiber content is 15 to 40 weight percent and 20 to 40 volume percent of the pre-coated slag crust material, so the wear resistance and strength are high, and a dovetail groove cannot be broken; therefore, the pre-coated slag crust material can stably cover the cooling wall for a long time, namely a layer of permanent pre-coated slag is formed on the cooling wall.

Description

technical field [0001] The invention relates to a cooling wall of a blast furnace, in particular to a cooling wall with pre-hanging slag skin. Background technique [0002] The blast furnace stave is an important part of the blast furnace structure. [0003] According to material classification, staves can be divided into cast iron staves, cast steel staves, copper staves, and composite structure staves with copper for hot surfaces and steel for cold surfaces. The surface of the stave towards the inner side of the blast furnace has a smooth surface, a concave-convex groove, and other structural forms, but the concave-convex groove structure is the main one. The function of the concave-convex groove is to facilitate the inlaying of the protective layer of refractory material and to facilitate the formation of a slag hanging protective layer on the surface of the stave after the refractory material is worn away. [0004] The refractory bricks inlaid on the surface of the sta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21B7/10
Inventor 章荣会李芳
Owner 北京联合荣大工程材料股份有限公司
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