High-thermal conductivity carbon ramming compound for large blast furnace

Abstract

The invention discloses a high-thermal conductivity carbon ramming compound for a large blast furnace. The carbon ramming compound consists of the following components in part by weight: 70 to 75 parts of crystalline flake graphite with the grain size of less than or equal to 0.15mm, 2 to 3 parts of copper powder with the grain size of less than or equal to 0.15mm, 3 to 5 parts of carbon black, 2to 3 parts of medium temperature pitch, 1 to 3 parts of tar, 6 to 10 parts of resin and 2 to 3 parts of tung oil. Because the graphite material is treated micro expanded graphite, the graphite is filled in an uncompacted space at certain temperature; because the copper powder has the heat conductivity of 200w / m.k, the heat-conducting property of the carbon ramming compound can be greatly improved; and the carbon ramming compound has high bonding strength and high plasticity through a composite binder of the tar, the resin and the tung oil. The high-thermal conductivity carbon ramming compoundis mainly applied to filling gaps between carbon blocks and cooling equipment in the blast furnace and leveling water-cooled tube ramming layers.

Description

technical field [0001] The invention belongs to the technical field of iron-making blast furnaces, and in particular relates to a high thermal conductivity carbon ramming material for large-scale blast furnaces. Background technique [0002] In addition to the reasonable collocation of refractory materials for the lining of the blast furnace, the choice of carbon ramming between the carbon block and the cooling system is also very important. If the thermal conductivity of the charcoal ramming is too low or pores are generated after the furnace is turned on, it will directly hinder the brick layer. The heat is transmitted to the cooling system, resulting in increased lining erosion. At present, the thermal conductivity of carbon ramming materials used in China is relatively low, most of them are between 10 and 17w / m.k, and some are even lower, which does not match the thermal conductivity of blast furnace carbon blocks, which seriously affects the function of cooling water an...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is the technical problem that the existing charcoal ramming material affects the cooling effect of the cooling equipment due to its low thermal conductivity. Long, high thermal conductivity carbon ramming material for large blast furnaces that can be constructed at room temperature

Solve the unfavorable factors of poor thermal conductivity of other charcoal stamping materials due to the low temperature in the cooling wall area and the lack of roasting conditions