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A long-life heat repair castable for iron ditch

A iron channel castable and hot repair technology, which is applied in the field of iron channel castables, can solve the problems of gas mismatch of metal aluminum powder, etc., and achieve the effects of reducing the generation of low melting phase, increasing density, and ensuring high temperature performance

Active Publication Date: 2021-09-21
中冶武汉冶金建筑研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a long-life iron channel castable for hot repair, which solves the problem of possible mismatch between cement solidification and metal aluminum powder gas generation, and effectively improves the service life of the iron channel castable for hot repair by comprehensively optimizing the ratio

Method used

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  • A long-life heat repair castable for iron ditch
  • A long-life heat repair castable for iron ditch
  • A long-life heat repair castable for iron ditch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A long-life heat repair castable for iron ditch, the components and their mass percentages are: brown corundum 56%; silicon carbide 13%; ball pitch 2.4%; pure calcium aluminate cement 2.5%; alumina micropowder 10.905%; silicon dioxide powder 1.5%; silicon carbide powder 11%; composite antioxidant 2%; metal aluminum powder 0.3%, explosion-proof fiber 0.075; dispersant 0.3%; The raw materials were weighed according to the above proportions and fully mixed; then water was added (the mass of water was 4.1% of the total mass of each raw material) and stirred evenly, and then vibrated and formed; The heat treatment was carried out for 24 hours, and the iron trough castable sample for long-life hot repair was prepared.

[0040] The performance test of the iron channel castable sample for long-life hot repair prepared in this embodiment is performed, and the results are shown in Table 1. The performance testing method adopted is carried out in accordance with the current natio...

Embodiment 2

[0044]A castable for long-life hot repairing iron trench, the components and their mass percentages are: brown corundum 64%; silicon carbide 5%; ball asphalt 2%; pure calcium aluminate cement 1.5%; alumina micropowder 12%; silicon dioxide powder 1.77%; silicon carbide powder 12%; composite antioxidant 1%; metal aluminum powder 0.2%, explosion-proof fiber 0.05%; dispersant 0.4%; coagulant 0.08%. The raw materials were weighed according to the above proportions and fully mixed; then water was added (the mass of water was 3.9% of the total mass of each raw material) and stirred evenly, and then vibrated and formed; after forming, the obtained samples were dried naturally for 24 hours and then reheated at 110°C. The heat treatment was carried out for 24 hours, and the iron trough castable sample for long-life hot repair was prepared.

[0045] The performance test of the iron channel castable sample for long-life hot repair prepared in this embodiment is performed, and the results ...

Embodiment 3

[0049] A long-life heat repair castable for iron ditch, the components and their mass percentages are: brown corundum 60%; silicon carbide 0-1mm: 9%; ball pitch 2.5%; pure calcium aluminate cement 2% 10% of alumina micropowder; 2% of silica micropowder; 13% of silicon carbide powder; 1.06% of composite antioxidant; 0.1% of metal aluminum powder, 0.1% of explosion-proof fiber; Weigh and mix each raw material according to the above ratio; then add water (the mass of water is 4% of the total mass of each raw material) and stir evenly, then vibrate and shape; after forming, the sample obtained is dried naturally for 24 hours and then reheated at 110°C. The heat treatment was carried out for 24 hours, and the iron trough castable sample for long-life hot repair was prepared.

[0050] The performance test of the iron channel castable sample for long-life hot repair prepared in this embodiment is performed, and the results are shown in Table 3. The performance testing method adopted...

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Abstract

The invention discloses an iron ditch castable for long-life heat repair, the composition of which is calculated by mass percentage: 56%-64% of brown corundum; 5%-13% of silicon carbide; 2%-3% of ball pitch; pure aluminum Calcium acid cement 1.5% ~ 2.5%; alumina micropowder 8% ~ 12%; silica micropowder 1.5% ~ 2.5%; silicon carbide powder 11% ~ 13%; composite antioxidant 1% ~ 2%; %‑0.3%; explosion-proof fiber less than 0.1%; dispersant 0.2% to 0.4%; coagulant less than 0.08%. The iron ditch castable of the present invention adopts a new type of coagulant, so that the metal aluminum powder in the iron ditch castable can generate hydrogen in advance, and when the castable does not produce solidification strength, it will generate gas to open the vent hole, and the suitable metal aluminum powder Cooperating with low-melting-point explosion-proof fibers, it ensures that the castable has excellent high-temperature performance while meeting the construction conditions.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to an iron ditch castable. Background technique [0002] In the past two years, with the continuous rise of steel prices, various iron and steel enterprises have emphasized high production and smooth production in order to seize production and strengthen smelting. Iron trenches are an important part of the ironmaking process. The extension of the fixed repair cycle of iron trenches is extremely important to steel companies. meaning. How to ensure the service life of the iron trench materials and prolong the regular repair cycle of the blast furnace under the premise of ensuring safe use is one of the primary survival conditions for the iron trench contracting enterprises. Especially for a large number of single taphole blast furnaces and 1000 cubic blast furnaces in China, the time available for pouring construction of iron trenches is seriously insufficient...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/103C04B35/63C04B38/02
CPCC04B35/103C04B35/6303C04B38/02C04B2235/3208C04B2235/3222C04B2235/3418C04B2235/3821C04B2235/3826C04B2235/402C04B2235/428C04B2235/5212C04B2235/5427C04B2235/5436
Inventor 魏建修邵荣丹
Owner 中冶武汉冶金建筑研究院有限公司
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