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Castable for major iron runner of blast furnace larger than 2500m<3>

A castable and main iron ditch technology, applied in the field of refractory castables, achieves the effects of good acid resistance, good thermal shock stability and reduced material consumption

Inactive Publication Date: 2012-10-24
JIANGSU DAOJUE GRAND NEW ENERGY VEHICLE
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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 iron trenches and brings great hidden dangers to the stable, safe and continuous production of blast furnaces. Improve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Use formula 1 to prepare blast furnace main iron trough: mix the ingredients according to formula 1 and stir it with a mixer to make castables, add castables to the mold installed in the main iron trough where molten iron flows, and demould after natural curing for 1 hour to obtain blast furnace main iron trough .

Embodiment 2

[0023] Use formula 2 to prepare the main iron channel of blast furnace: mix the ingredients according to formula 2 and stir them with a mixer to form castables, then add castables to the mold installed in the main iron channel through which molten iron flows, and demould after natural curing for 1 hour to obtain the main iron channel of blast furnace .

Embodiment 3

[0025] Use formula 3 to prepare blast furnace main iron trough: mix the ingredients according to formula 3 and stir them into castables with a mixer, add castables to the mold installed in the main iron trough where molten iron flows through, and demould after natural curing for 2 hours to obtain blast furnace main iron trough . See the table below for specific indicators:

[0026]

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PUM

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Abstract

The invention relates to a castable for a major iron runner of a blast furnace larger than 2500m<3> and belongs to the field of refractory castables. The castable comprises, by weight, 50-55 parts of tubular corundum, 1-8 parts of bubble zirconia, 3-10 parts of zirconium silicate, 10-25 parts of aluminum zinc spinel powder, 10-15 parts of carbon composite materials, 3-10 parts of aluminum oxide micro powder, 1-2 parts of silicon metal powder, 0.1-0.2 part of sodium tripolyphosphate, 0.05-0.2 part of aluminum metal powder, and 4-10 parts of silica sol suspension. The blast furnace major iron runner made of the castable has the advantages of being good in thermal shock stability, stripping resistant and long in service life.

Description

technical field [0001] The present invention relates to a kind of more than 2500m 3 The utility model relates to a blast furnace main iron trough castable, which belongs to the field of refractory castables. [0002] Background technique [0003] The existing main iron trough castable is ordinary Al 2 o 3 -SiC-C castables, but ordinary Al 2 o 3 -SiC-C main iron trough castables are used in blast furnaces, and the amount of one-time passing iron is 120,000 tons. With the strengthening of smelting, the demand for increasing production is becoming more and more prominent, and the requirements for the amount of iron passing through the main iron channel are becoming more and more stringent. However, due to the poor thermal shock resistance of the iron channel, it is not resistant to erosion, which leads to product peeling, which is the lifespan. The main reason for the shortness. [0004] CN102101782A discloses a castable for main iron trough, said castable is made of alum...

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 JIANGSU DAOJUE GRAND NEW ENERGY VEHICLE
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