Castable

A castable and main material technology, which is applied in metallurgical iron trench castables and castables, can solve the problems of stable and safe production of blast furnaces, poor thermal shock resistance, thermal spalling structures, etc., and achieve enhanced high temperature strength and various properties , Good construction performance, 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, which is easy to cause thermal spalling and structural spalling, which greatly increases the frequency of repairing the support iron ditch and brings great hidden dangers to the stable and safe production of blast furnaces. Improve

Method used

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  • Castable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

Embodiment 2

[0022] Use formula 2 to prepare the blast furnace support iron channel: mix the ingredients according to formula 2 and stir in the mixer, then add the above-mentioned total amount of 3-8% of clean water, stir evenly, and pour it into the mold installed in the support iron channel where the molten iron flows. Add castables, and natural curing for 1 hour to demould the blast furnace support iron ditch.

Embodiment 3

[0024] Use formula 3 to prepare blast furnace support iron channel: mix ingredients according to formula 3 and stir in a mixer, then add 3-8% of the above-mentioned total amount of clean water, stir evenly, and pour it into the mold installed in the support iron channel through which molten iron flows. Add castables, and natural curing for 1 hour to demould the blast furnace support iron ditch.

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Abstract

The invention relates to castable. The castable is prepared from a main material and additives. The main material is prepared from, by weight, 5-8 parts of 8-5 mm barium aluminate, 15-20 parts of 5-3 mm chromium mononitride, 10-15 parts of 3-1 mm sillimanite, 8-15 parts of 1-0 mm calcium chromite, 2-5 parts of clay-like powder, 3-7 parts of cobalt aluminum oxide powder, 5-10 parts of cutting powder, 3-8 parts of amorphous graphite, 1-2 parts of composite powdered carbon, 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 aluminum oxide and 0-5 parts of electric-smelted pure calcium aluminate cement. With the main material accounting for 100% by weight in total, the additives are prepared from, by weight, 0.1-0.2 part of calcium lignosulfonate, 0.01-0.05 part of nanometer dried potato powder, 0.01 part of malic acid and 0.01 part of C12H14N4O5S2. A blast furnace iron runner made of the castable has the advantages of being good in thermal shock resistance, high in corrosion resisting performance, large in iron exchanging amount and long in service life.

Description

technical field [0001] The invention relates to a pouring material, which belongs to the field of metallurgical iron ditch castables. Background technique [0002] Most of the existing iron channel castables are Al2O3-SiC-C castables, but ordinary Al2O3-SiC-C iron channel castables are used in blast furnaces, and the amount of iron passing through them at one time is about 120,000 tons. With the strengthening of smelting, the demand for increasing the output of molten iron is becoming more and more prominent, and the need for a large amount of iron to be passed through the iron channel at one time is also becoming more and more urgent. However, due to the poor corrosion resistance and thermal shock resistance of the iron channel at present, thermal spalling has occurred. And structural spalling is an important reason for the short life of the support iron ditch. [0003] CN102101782A discloses a casting material for iron trench, which is composed of magnesium aluminum spine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 山国强
Owner 山国强
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