A kind of asphalt binder for ultra-microporous carbon brick and preparation method thereof

Abstract

The invention relates to an asphalt binder for ultra-microporous carbon bricks and a preparation method thereof. The technical scheme is: according to the molar ratio of copper element: molybdenum element: cerium element (1~4): (0.5~2): (0.2~3), copper salt, molybdenum salt and cerium salt are mixed, ball milled, dried, Incubate for 1-3 hours under the condition of hydrogen atmosphere and 400-900°C to obtain the double salt additive. Then add 0.1~5wt% double salt additive, 0.1~1wt% surfactant, 1~10wt% ultrafine elemental silicon powder, 1~5wt% ultrafine carbon powder, 30~50wt% coal tar medium temperature pitch and 40~60wt% Coal tar high-temperature asphalt is mixed and ball milled to obtain asphalt ball grinding material. Add asphalt ball abrasive 0.1~1wt% orthosilicate ethyl ester, 0.1~1wt% organic acid and 0.1~1wt% aluminum salt, keep warm at 70~110°C and 150~220°C for 1~5h respectively; stir to obtain ultra-microporous Asphalt binder for carbon bricks. The ultra-microporous carbon brick prepared by using the asphalt binder prepared by the invention has high compressive strength and thermal conductivity, and good resistance to melting loss of molten iron.

Description

technical field [0001] The invention belongs to the technical field of refractory materials. In particular, it relates to an asphalt binder for ultra-microporous carbon bricks and a preparation method thereof. Background technique [0002] The blast furnace is the main equipment in the iron and steel metallurgy industry to produce molten iron using the iron ore-coke reduction method. Among its working parts, the hearth of the blast furnace cannot be hot repaired due to the storage of hot molten iron, so the life of the carbon bricks in this part determines the life of the blast furnace generation. With the modernization and large-scale development of blast furnaces and the realization of enhanced smelting technology, prolonging the life of blast furnaces has become the main goal of reducing consumption and increasing efficiency for iron and steel enterprises, thus putting forward higher and higher requirements for the quality of carbon bricks. [0003] Blast furnace carbon...

AI Technical Summary

Problems solved by technology

[0004] However, the blast furnace microporous carbon brick prepared by the prior art scheme will reduce the strength, thermal conductivity and melting resistance of the produced carbon brick product due to the high volatile content of the pitch and the low carbon residue rate; the resin is used as the Additives or binders are convenient for low-temperature or normal-temperature molding of products, but will significantly increase the cost. In addition, the resin is carbonized to form amorphous glassy carbon, which has poor thermal conductivity and low carbon residue rate, which greatly reduces the thermal conductivity of carbon bricks.