Major iron runner casting material for blast furnace

A technology of castables and main iron channels, which is applied in the field of metallurgical refractory materials, can solve the problems of stable and safe production of blast furnaces, poor thermal shock resistance, and thermal spalling structures, etc., to achieve enhanced high temperature strength and various properties, and good construction performance , Increase the effect of wetting angle

Inactive Publication Date: 2016-01-13
张婷
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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 repair

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

Embodiment 2

[0022] Use formula 2 to prepare the main iron trough of the blast furnace: add the 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 main iron trough through which the molten iron flows. Add castables and naturally cure for 1 hour to demould the main iron trough of the blast furnace.

Embodiment 3

[0024] Use formula 3 to prepare the main iron ditch of the blast furnace: mix the 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 put it into the mold installed in the main iron ditch through which the molten iron flows. Add castables and naturally cure for 1 hour to demould the main iron trough of the blast furnace.

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PUM

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Abstract

The present invention relates to a major iron runner casting material for a blast furnace, belongs to the field of refractory casting materials, and comprises the following components in parts by weight: 5-8 parts of 8-5mm chromium nitride, 15-20 parts of 5-3mm zirconium corundum, 10-15 parts of 3-1mm sillimanite, 8-15 parts of 1-0mm calcium chromate, 2-5 parts clay powder, 3-7 parts of cobalt aluminum oxide powder, 5-10 parts of cutting powder, 3-8 parts of amorphous graphite powder, 1-2 parts of composite carbon powder, 0-3 parts of molybdenum trioxide powder, 3-5 parts of aluminium oxide micro powder, 1-5 parts of magnesium iron oxide powder, 1-3 parts of rho-aluminium oxide and 0-5 parts of electric smelting pure calcium aluminate cement. Based on the total weight by parts of the main materials: 100%, the additives comprise the following components in parts by weight: 0.1-0.2 part of lignin calcium sulfonate, 0.01-0.05 part of nano potato powder, 0.01 part of malic acid and 20:1 parts of C12H14N4O5S. The iron runner for the blast furnace made of the casting material has the characteristics of good thermal shock resistance, high corrosion resistance, large iron influx and long service life.

Description

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

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 张婷
Owner 张婷
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