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Blast furnace tapping channel castable

A technology of tapping channels and castables, which is applied in the field of refractory materials, can solve the problems of high melting loss rate, high raw material cost, and low durability, and achieve the effects of high durability, burst prevention, and easy discharge

Inactive Publication Date: 2020-09-18
天津炜润达新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the castables for the main channel of the blast furnace tapping trough are produced with high-priced dense fused corundum and high-quality fused brown corundum as the main raw materials. However, this kind of castable with brown corundum as the main particle is not only The cost is high, the melting loss rate is high, and the durability is low, which greatly increases the frequency of iron trench repair operations

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A blast furnace tapping trough castable is characterized in that its components are proportioned as follows in parts by weight:

[0031] Brown corundum particles: 15 parts;

[0032] Dense corundum particles: 10 parts;

[0033] Silicon carbide particles: 10 parts;

[0034] Carbon material: 1 part;

[0035] Metal silicon powder: 2 parts;

[0036] Silicon carbon powder: 3 parts;

[0037] Alumina fine powder: 10 parts;

[0038] Alumina hollow ball: 2 parts;

[0039] High alumina fine powder: 5 parts;

[0040] High alumina cement: 2 parts;

[0041] Composite water reducer: 1 part;

[0042] Admixture: 0.4 parts;

[0043] Explosion-proof fiber: 0.3 parts.

[0044] In particular, the particle size of the brown corundum particles and the dense corundum particles is 1mm.

[0045] In particular, the silicon carbide particles in the silicon carbide ≥ 97%, Fe 2 o 3 ≤0.4%, free carbon ≤0.5%, free silicon ≤0.6%, and the particle diameter of the silicon carbide particles i...

Embodiment 2

[0053] A blast furnace tapping trough castable is characterized in that its components are proportioned as follows in parts by weight:

[0054] Brown corundum particles: 20 parts;

[0055] Dense corundum particles: 16 parts;

[0056] Silicon carbide particles: 15 parts;

[0057] Carbon material: 4 parts;

[0058] Metal silicon powder: 6 parts;

[0059] Silicon carbon powder: 5 parts;

[0060] Alumina fine powder: 18 parts;

[0061] Alumina hollow ball: 8 parts;

[0062] High alumina fine powder: 10 parts;

[0063] High alumina cement: 4 parts;

[0064] Composite water reducer: 2 parts;

[0065] Admixture: 1 part;

[0066] Explosion-proof fiber: 0.5 parts.

[0067] In particular, the particle size of the brown corundum particles and the dense corundum particles is 5mm.

[0068] In particular, the silicon carbide particles in the silicon carbide ≥ 97%, Fe 2 o 3 ≤0.4%, free carbon ≤0.5%, free silicon ≤0.6%, and the particle diameter of the silicon carbide particles i...

Embodiment 3

[0076] A blast furnace tapping trough castable is characterized in that its components are proportioned as follows in parts by weight:

[0077] Brown corundum particles: 18 parts;

[0078] Dense corundum particles: 13 parts;

[0079] Silicon carbide particles: 13 parts;

[0080] Carbon material: 2 parts;

[0081] Metal silicon powder: 4 parts;

[0082] Silicon carbon powder: 4 parts;

[0083] Alumina fine powder: 14 parts;

[0084] Alumina hollow ball: 6 parts;

[0085] High alumina fine powder: 7 parts;

[0086] High alumina cement: 3 parts;

[0087] Composite water reducer: 1.5 parts;

[0088] Admixture: 0.7 parts;

[0089] Explosion-proof fiber: 0.4 parts.

[0090] In particular, the particle size of the brown corundum particles and the dense corundum particles is 3 mm.

[0091] In particular, the silicon carbide particles in the silicon carbide ≥ 97%, Fe 2 o 3 ≤0.4%, free carbon ≤0.5%, free silicon ≤0.6%, and the particle diameter of the silicon carbide partic...

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Abstract

The invention relates to a blast furnace tapping channel castable, which is characterized by comprising the following components by weight: 15-20 parts of brown fused alumina particles, 10-16 parts ofcompact corundum particles, 10-15 parts of silicon carbide particles, 1-4 parts of a carbon material, 2-6 parts of metal silicon powder, 3-5 parts of silicon carbon micro powder, 10-18 parts of aluminum oxide micro powder, 2-8 parts of alumina hollow spheres, 5-10 parts of high-aluminum fine powder, 2-4 parts of high-alumina cement, 1-2 parts of a composite water reducing agent, 0.4-1 part of anadditive, and 0.3-0.5 parts of explosion-proof fibers. The high-temperature strength, the oxidation resistance and the slag resistance of the castable can be improved conveniently, the castable is prevented from cracking in the baking process, moisture in the castable is discharged conveniently, and the castable is not prone to damage and high in durability.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a casting material for a blast furnace tapping trough. Background technique [0002] The blast furnace tapping trough is the channel that guides the flow of high-temperature molten iron and slag during the blast furnace tapping process, and is also the main area where refractory materials are consumed in the ironmaking process. At present, the castables for the main channel of the blast furnace tapping trough are produced with high-priced dense fused corundum and high-quality fused brown corundum as the main raw materials. However, this kind of castable with brown corundum as the main particle is not only The cost is high, the melting loss rate is high, and the durability is low, which greatly increases the frequency of iron trench repair operations. Contents of the invention [0003] The invention aims to solve the deficiencies of the prior art, and provides a blast furnac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/80C04B35/103
CPCC04B35/103C04B35/66C04B2235/3826C04B2235/402C04B2235/422C04B2235/425C04B2235/428C04B2235/447C04B2235/5212C04B2235/9684
Inventor 朱万政田博孙忠皓高子齐窦佳伟曹村兵朱文龙
Owner 天津炜润达新材料科技有限公司