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Branch iron runner pouring material of 850m<3> blast furnace

A castable and iron-supporting ditch technology, applied in the field of metallurgical refractory materials, can solve the problems of stable and safe production of blast furnaces, poor thermal shock resistance, thermal spalling structure, etc., to reduce the amount of additives, high thermal shock resistance, The effect of improving thermal shock resistance

Active Publication Date: 2014-04-30
SUZHOU FABAI TEXTILE CO LTD
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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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  • Branch iron runner pouring material of 850m&lt;3&gt; blast furnace

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Prepare 850m using recipe 1 3 Blast furnace iron ditch: After the ingredients are prepared according to formula 1 and the castable is stirred by a mixer, the castable is added to the mold installed in the iron ditch through which molten iron flows, and the blast furnace iron ditch is naturally cured for 1 hour and demoulded.

Embodiment 2

[0020] Prepare 850m using recipe 2 3 Blast furnace iron ditch: After the ingredients are prepared according to formula 1 and the castable is stirred by a mixer, the castable is added to the mold installed in the iron ditch through which molten iron flows, and the blast furnace iron ditch is naturally cured for 1 hour and demoulded.

Embodiment 3

[0022] Prepare 850m using recipe 3 3 Blast furnace iron ditch: After the ingredients are prepared according to formula 1 and the castable is stirred by a mixer, the castable is added to the mold installed in the iron ditch through which molten iron flows, and the blast furnace iron ditch is naturally cured for 1 hour and demoulded. The specific indicators are shown in the table below

[0023]

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Abstract

The invention relates to a branch iron runner pouring material of an 850m<3> blast furnace and belongs to the field of fireproof pouring materials. The pouring material comprises the following components in parts by weight: 48-56 parts of moissanite, 1-8 parts of CeO2, 3-10 parts of metal silicon powder, 10-25 parts of zinc-aluminum spinel powder, 10-15 parts of a waste smelting furnace shell, 3-10 parts of SrTiO3 powder, 1-2 parts of Guangxi mud, 1-5 parts of silicon nitride powder, 0.1-0.2 part of sodium tripolyphosphate, 0.05-0.2 part of styrene maleic anhydride and 3-8 parts of aluminum sol suspension liquid, wherein the waste smelting furnace shell is a furnace shell for producing graphite and mainly comprises 50%-68% of SiC and 18%-30% of C. A blast furnace iron runner prepared from the pouring material has the characteristics of good thermal shock property, good corrosion and stripping resistance, large iron flux and long service life.

Description

technical field [0001] The present invention relates to a 850m 3 A blast furnace iron ditch castable belongs to the field of metallurgical refractory materials. Background technique [0002] Most of the existing castables for supporting iron trenches are Al 2 O 3 -SiC-C castable, but ordinary Al 2 O 3 -SiC-C iron ditch castables are used in blast furnaces, and the one-time iron flux is about 100,000 tons. With the strengthening of smelting, the demand for increasing the production of molten iron has become increasingly prominent, and the demand for a large amount of iron in the branch iron ditch at one time has become more and more urgent. The lack of corrosion resistance is an important reason for the short service life of the iron ditch. [0003] CN102101782A discloses an iron ditch castable, the castable is composed of bauxite, brown corundum, silicon carbide, modified nano-carbon powder, SiO 2 Micro powder, calcium aluminate cement, α-Al 2 O 3 Micro powder, expl...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 汤炼芳
Owner SUZHOU FABAI TEXTILE CO LTD
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