Blast furnace bottom joint filler and preparation method thereof

Abstract

The invention discloses a blast furnace bottom joint filler. The joint filler comprises, by weight, 100 parts of dry materials and 10-25 parts of a binder, wherein 100 parts of the dry materials include silicon carbide particles, fine silicon carbide powder, carbon, a metal-nonmetal composite powder, a silicon dioxide micro-powder, a clay micro-powder, an aluminum oxide micro-powder, a dispersantand a curing agent. The invention further discloses a preparation method of the blast furnace bottom joint filler. The blast furnace bottom joint filler has a high heat conductivity coefficient, can effectively transfer heat, has a high strength index and a high density, has no pollution to the environment, is easy to construct, can fully fill joints, can closely combine with a material for filling the area, can be constructed at a high temperature, also can be constructed and solidified at normal temperature, has a small linear change rate and a good thermal shock stability in a use temperature interval, and improves the resource utilization rate by using wastes in other industries.

Description

technical field [0001] The invention belongs to the technical field of metallurgical refractory materials, and in particular relates to a blast furnace bottom caulking material and a preparation method thereof, more specifically, relates to a blast furnace bottom caulking material curable at room temperature with high thermal conductivity and high strength and its preparation method. Background technique [0002] Blast furnace is the key equipment for ironmaking. With the advancement and continuous strengthening of blast furnace smelting technology, blast furnace equipment is becoming larger and larger, and higher requirements are put forward for the performance of various refractory materials used in blast furnaces. The bottom part of the blast furnace is subjected to high temperature, high pressure, slag and iron erosion and infiltration, and the working conditions are very harsh. In the leveling layer at the bottom of the blast furnace, as well as the gaps between the ca...

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Problems solved by technology

[0006] (1) The main raw materials are carbon materials such as graphite and anthracite. On the one hand, the tamping density is low and leveling is difficult during large-area construction, which affects the density and heat transfer of the material; on the other hand, with the strengthening of smelting, the furnace With the improvement of the performance requirements of the bottom carbon brick, the thermal conductivity of the carbon ramming material is difficult to meet the design standard, which will hinder the performance of the high thermal conductivity carbon brick, and ultimately affect the life of the blast furnace and the normal production of the blast furnace;

[0007] (2) Tar, asphalt, resin, etc. are used as the binder, which will volatilize harmful gases during use and pollute the environment. The binder contains more volatile matter and causes high apparent porosity and reduced thermal conductivity of carbon ramming materials;

[0008] (3) It needs to be heated to a certain temperature during production or construction, which is not convenient enough, increases the labor intensity of workers and the difficulty of construction, and does not conform to the development trend of resource conservation and environmental friendliness

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