Carbon ramming material for blast furnace and preparation method for carbon ramming material

Abstract

The invention relates to a carbon ramming material for a blast furnace and a preparation method for the carbon ramming material. The carbon ramming material for the blast furnace comprises the following components in part by weight: 35 to 65 parts of component A, 25 to 55 parts of component B, 5 to 16 parts of corundum with the granularity of less than 0.1 millimeter, and 8 to 15 parts of thermosetting phenol resin; the component A is electrically calcined anthracitic coal or mixture of electrically calcined anthracitic coal and artificial graphite, and the granularity of the component A is 0.1 to 5 millimeters; the component B is one of natural graphite, silicon carbide, electrically calcined anthracitic coal, artificial graphite and mixture of electrically calcined anthracitic coal and artificial graphite, and the granularity of the component B is less than 0.1 millimeter; and the electrically calcined anthracitic coal is formed at the temperature of between 1,700 and 2,400 DEG C. The carbon ramming material for the blast furnace has good heat conducting performance.

Description

technical field [0001] The invention relates to a carbon ramming material filled between the hearth carbon brick and cooling wall of an ironmaking blast furnace and a preparation method thereof. Background technique [0002] With the rapid development of the iron and steel industry and the continuous improvement of ironmaking technology, blast furnaces are developing in the direction of large-scale and long-life. At present, the blast furnace hearth is generally cooled by copper walls with high thermal conductivity (thermal conductivity ~ 260W / (m K)), and the carbon bricks used in the hearth and furnace bottom also have high thermal conductivity. Practice has proved that the main link that restricts the longevity of the blast furnace is the hearth part. The important reason is that the thermal conductivity of the carbon brick is greatly improved and the application of the copper stave, but the thermal conductivity of the carbon ramming material is poor, which seriously affec...

AI Technical Summary

Problems solved by technology

Practice has proved that the main link that restricts the longevity of the blast furnace is the hearth part. The important reason is that the thermal conductivity of the carbon brick is greatly improved and the application of the copper stave, but the thermal conductivity of the carbon ramming material is poor, which seriously affects the cooling strength of the stave. , hinder the high thermal conductivity of high thermal conductivity carbon bricks and copper staves, so that the hearth brick lining cannot be effectively cooled, resulting in too fast damage to the brick lining at this part, and ultimately affecting the life of the blast furnace and the normal production of the blast furnace

From the literature [Deng Tang, Zou Zuqiao, Li Huaiyuan, etc., Wuhan Iron and Steel No. 7 blast furnace bottom, hearth carbon ramming material and carbon cement selection test research. Ironmaking, 2005, 24 (5): 24-26] to 6 companies According to the test performance of carbon ramming materials in carbon material production plants, its thermal conductivity is low (concentrated below 20W / (m K) at 300°C), which is far from meeting the requirements of modern blast furnaces.

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