Cement-free iron runner castable for skimmer preformed unit

A cement-free technology for iron trench castables, which is applied in the field of materials, can solve the problems of the site being greatly affected by high temperature, the failure of silica sol freezing, and troublesome construction, so as to improve the thermal strength and the ability to Slag performance, enhance the effect of slag resistance

Pending Publication Date: 2019-10-25
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

But its construction is troublesome, the silica sol freezes in winter and fails, the site is greatly affected by high temperature, and the amount of liquid added is large

Method used

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  • Cement-free iron runner castable for skimmer preformed unit
  • Cement-free iron runner castable for skimmer preformed unit
  • Cement-free iron runner castable for skimmer preformed unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A cementless iron ditch castable for skimmer prefabricated parts, each component and its mass percentage are: dense corundum aggregate 56%; silicon carbide 0-1mm: 10%; ball pitch 2%; alumina Micropowder 6%; high-purity silica micropowder 6%; silicon carbide powder 8%; silicon nitride powder 1.5%; nano-carbon black 0.3%; metal aluminum powder 0.5%, explosion-proof fiber 0.08%; 1% boron carbide powder; 0.2% boron carbide powder; 6.32% dense corundum powder. The raw materials were weighed according to the above proportions and fully mixed; then water was added (the mass of water was 3.2% of the total mass of each raw material) and stirred evenly, then vibrated and formed; The heat treatment was carried out for 24 hours, and the cementless iron ditch castable sample for the skimmer prefabricated parts was prepared.

[0035] The performance test of the prefabricated part of the skimmer prepared in this example was performed with a cementless iron ditch castable sample, and ...

Embodiment 2

[0039]A cementless iron ditch castable for skimmer prefabricated parts, each component and its mass percentage are: dense corundum aggregate 62%; silicon carbide 0-1mm: 6%; ball pitch 2%; alumina Micropowder 6%; high-purity silica micropowder 5%; silicon carbide powder 3%; silicon nitride powder 6%; nano-carbon black 0.2%; metal aluminum powder 0.6%, explosion-proof fiber 0.1%; 0.6% boron carbide powder; 0.3% boron carbide powder; 8% dense corundum powder. The raw materials were weighed according to the above proportions and fully mixed; then water was added (the mass of water was 3.2% of the total mass of each raw material) and stirred evenly, then vibrated and formed; The heat treatment was carried out for 24 hours, and the cementless iron ditch castable sample for the skimmer prefabricated parts was prepared.

[0040] The performance test of the prefabricated part of the skimmer prepared in this example was performed with the cementless iron ditch castable sample, and the ...

Embodiment 3

[0044] A cementless iron ditch castable for skimmer prefabricated parts, the components and their mass percentages are: dense corundum aggregate 58.93%; silicon carbide 0-1mm: 10%; ball pitch 2.5%; alumina Micropowder 10%; high-purity silica micropowder 3%; silicon carbide powder 8%; silicon nitride powder 3%; nano-carbon black 0.4%; metal aluminum powder 1%, explosion-proof fiber 0.08%; 0.5% of boron carbide powder; 0.4% of boron carbide powder; 2% of dense corundum powder. The raw materials were weighed according to the above proportions and fully mixed; then water was added (the mass of water was 3.2% of the total mass of each raw material) and stirred evenly, then vibrated and formed; The heat treatment was carried out for 24 hours, and the cementless iron ditch castable sample for the skimmer prefabricated parts was prepared.

[0045] The performance test of the prefabricated part of the skimmer prepared in this example was performed with a cementless iron ditch castable...

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Abstract

The invention discloses a cement-free iron runner castable. The cement-free iron runner castable is composed of 58-62% of a compact corundum aggregate, 6-10% of silicon carbide, 2-3% of spherical asphalt, 1.5-6% of silicon nitride powder, 6-10% of alumina micro powder, 3-6% of silicon dioxide micro powder, 0.2-0.4% of nano carbon black, 3-8% of silicon carbide powder, 0.2-0.4% of boron carbide powder, 0.5-1% of metal aluminum powder, 0.5-1% of metal silicon powder, 0.08-0.12% of explosion-proof fibers, 0.1-0.3% of a dispersing agent and 2-8% of compact corundum powder. According to the invention, an iron runner castable system is formed by combining high-purity silicon dioxide micro-powder and aluminum oxide micro-powder, so that the purity, refractoriness and compactness of the castable reach a new height. Through high-purity, high density and the like of the system disclosed by the invention, the heat-state rupture strength, which is the index with most high-temperature representativeness, after heat is preserved by 1 hour at 1400 DEG C reaches 10 MPa or above.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a cementless iron ditch castable for a skimmer prefabricated part. Background technique [0002] The iron trough of the blast furnace casthouse is an important part of the ironmaking process, and the length of the regular maintenance cycle of the iron trough is of great significance to the steel company in terms of environmental protection and economic benefits. How to ensure the service life of the iron channel material and prolong the regular repair period of the blast furnace under the premise of ensuring safe use is an important issue. The service life of the iron trough skimmer directly determines the regular maintenance cycle of the main iron trough, so the material of this part needs to be used with the best effect. At present, cement-bonded aluminum silicon carbide carbon iron troughs are almost used at home and abroad. Castables, however, even if the syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/103
CPCC04B35/103C04B2235/3418C04B2235/3821C04B2235/3826C04B2235/3873C04B2235/402C04B2235/428C04B2235/48C04B2235/5212C04B2235/526C04B2235/5427C04B2235/5436C04B2235/5445C04B2235/77C04B2235/96C04B2235/9615C04B2235/9676
Inventor 魏建修
Owner 中冶武汉冶金建筑研究院有限公司
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