Refractory castable

A technology of refractory castables and castables, applied in the field of refractory castables, can solve the problems of stable and safe production of blast furnaces, high viscosity of binders, thermal spalling structures, etc., and achieve enhanced high temperature strength, various properties, and thermal shock stability Good, increase the effect of wetting angle

Inactive Publication Date: 2016-02-17
山国强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of castable with brown corundum as the main component has poor thermal shock resistance, and it is easy to cause thermal spalling and structural spalling, which greatly increases the frequency of repair...

Method used

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  • Refractory castable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Use formula 1 to prepare blast furnace branch iron ditch: ingredients according to formula 1 and stir in a mixer, and then add 3-8% of the above-mentioned total amount of clean water, stir evenly, and put it into the mold installed in the branch iron ditch through which the molten iron flows. Add the castable, naturally cure for 1 hour to demould the blast furnace branch iron ditch.

Embodiment 2

[0022] Use formula 2 to prepare blast furnace branch iron ditch: ingredients according to formula 2 and stir in a mixer, and then add 3-8% of the above-mentioned total amount of clean water, stir evenly, and put it into the mold installed in the branch iron ditch through which the molten iron flows. Add the castable, naturally cure for 1 hour to demould the blast furnace branch iron ditch.

Embodiment 3

[0024] Use formula 3 to prepare blast furnace branch iron ditch: mix according to formula 3 and stir in a mixer, then add 3-8% of the above-mentioned clean water, stir evenly, and put it into the mold installed in the branch iron ditch through which the molten iron flows. Add the castable, naturally cure for 1 hour to demould the blast furnace branch iron ditch.

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Abstract

The invention relates to refractory castable. The castable comprises a main material and additives. The main material is prepared from, by weight, 5-8 parts of barium aluminate with granularity of 5-8 mm, 15-20 parts of chromium nitride with granularity of 3-5 mm, 10-15 parts of andalusite with granularity of 1-3 mm, 8-15 parts of calcium chromate with granularity of 0-1 mm, 2-5 parts of partial clay powder, 3-7 parts of cobaltous oxide aluminum powder, 5-10 parts of cutting powder, 3-8 parts of earthy graphite powder, 1-2 parts of composite carbon powder, 0-3 parts of molybdenum trioxide powder, 3-5 parts of alumina micro powder, 1-5 parts of magnesium oxide iron powder, 1-3 parts of rho-alumina and 0-5 parts of electric smelting pure calcium aluminate cement. With the total weight parts of the main material being 100 parts, the additives are prepared from, by weight, 0.1-0.2 part of calcium lignosulphonate, 0.01-0.05 part of nanometer potato powder, 0.01 part of malic acid and 0.1 part of C12H14N4O5S2. A blast furnace iron groove prepared from the castable has the advantages of being high in thermal seismic resistance, high in corrosion resistance, large in iron exchange amount and long in service life.

Description

Technical field [0001] The invention relates to a refractory castable, belonging to the field of iron trough castables for metallurgy. Background technique [0002] Most of the existing branch iron ditch castables are Al2O3-SiC-C castables, but ordinary Al2O3-SiC-C branch iron ditch castables are used in blast furnaces, and the amount of one-time iron pass is about 120,000 tons. With the intensified smelting, the demand for increasing the output of molten iron has become more and more prominent, and the demand for a large amount of one-time iron flow in branch iron ditch is becoming more and more urgent. However, due to poor corrosion resistance and poor thermal shock resistance, the branch iron ditch has hot spalling. And structural spalling is an important reason for the short life of the branch iron trench. [0003] CN102101782A discloses an iron ditch castable, which is composed of magnesium aluminum spinel, brown corundum, silicon carbide, modified nano carbon powder, SiO2 po...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 山国强
Owner 山国强
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