High-alumina castables for permanent layers of torpedo tanks

A high-alumina castable and permanent layer technology, applied in the field of refractory materials, can solve problems such as easy occurrence of gaps, and achieve the effects of reducing usage, long service life, and maintaining volume stability

Active Publication Date: 2020-11-03
WUGANG REFRACTORY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The repairing material prepared by the above-mentioned components in the invention has slag erosion resistance, but the volume of the repairing material shrinks after baking, and gaps are more likely to appear between the working layer and the permanent layer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] High-alumina castables for permanent layers of torpedo tanks, which consist of the following components by weight percentage:

[0029] Mullite brick recycled material 70%, high alumina bauxite clinker 15%, calcium aluminate cement 5%, pyrophyllite 4%, silicon micropowder 5.5%, polypropylene fiber 0.01%, superplasticizer 0.49%.

[0030] Among them, Al in the recycled materials of mullite bricks 2 o 3 The weight percentage is 45%, and the particle size of the mullite brick recycled material is 0.088mm≤particle size≤8mm; in terms of weight percentage, the particle size gradation in the mullite brick recycled material is: 0.088mm≤particle size≤1mm 15%, 1mm

[0031] Al in high alumina bauxite clinker 2 o 3 The weight percentage is 85%, and the particle size of the high-alumina bauxite clinker is ≤1mm; by weight percentage, the particle size gradation in the high-alumina bauxite clinker is: 0.088m...

Embodiment 2

[0039] High-alumina castables for permanent layers of torpedo tanks, which consist of the following components by weight percentage:

[0040] Mullite brick recycled material 50%, high alumina bauxite clinker 35%, calcium aluminate cement 1%, pyrophyllite 8%, silicon micropowder 5.9%, polypropylene fiber 0.04%, water reducer 0.06%.

[0041] Among them, Al in the recycled materials of mullite bricks 2 o 3 The weight percentage is 48%, and the particle size of the mullite brick recycled material is 0.088mm≤particle size≤8mm; in terms of weight percentage, the particle size gradation in the mullite brick recycled material is: 0.088mm≤particle size≤1mm 5%, 1mm

[0042] Al in high alumina bauxite clinker 2 o 3 The weight percentage is 88%, and the particle size of the high-alumina bauxite clinker is ≤1mm; by weight percentage, the particle size gradation in the high-alumina bauxite clinker is: 0.088mm≤pa...

Embodiment 3

[0050] High-alumina castables for permanent layers of torpedo tanks, which consist of the following components by weight percentage:

[0051] Mullite brick recycled material 57%, high alumina bauxite clinker 30%, calcium aluminate cement 3%, pyrophyllite 6%, silicon micropowder 3.8%, polypropylene fiber 0.01%, superplasticizer 0.19%.

[0052] Among them, Al in the recycled materials of mullite bricks 2 o 3 The weight percentage is 58%, and the particle size of the recycled mullite brick is 0.088mm≤particle size≤8mm; in terms of weight percentage, the particle size gradation in the recycled mullite brick is: 0.088mm≤particle size≤1mm 10%, 1mm

[0053] Al in high alumina bauxite clinker 2 o 3 The weight percentage is 89%, and the particle size of the high-alumina bauxite clinker is ≤1mm; by weight percentage, the particle size gradation in the high-alumina bauxite clinker is: 0.088mm≤particle size≤1m...

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Abstract

The invention relates to refractory materials applied to the field of iron and steel smelting, in particular to a high-aluminum castable for torpedo ladle permanent layers. The high-aluminum castablefor torpedo ladle permanent layers comprises, by weight, 50-70% of mullite brick reclaimed materials, 15-35% of bauxite chamotte, 1-5% of calcium aluminate cement, 2-8% of pyrophyllite, 2.5-5.5% of silica powder, 0.01-0.04% of polypropylene fiber and 0.06-0.49% of water reducing agent. The change of volume of high-aluminum castable before and after sintering is small so that the potential safety hazard of big gap formed between a working layer and the permanent layer due to volume change of high-aluminum castable is reduced. Besides, the high-aluminum castable has good medium-and-high temperature strength, the risk of pulverization of the high-aluminum castable caused by low strength during application is avoided.

Description

technical field [0001] The invention relates to a refractory material used in the iron and steel smelting field, in particular to a high-alumina casting material used for the permanent layer of a torpedo tank. Background technique [0002] Torpedo tank car, also known as torpedo-type mixed iron car, is a large-scale molten iron transportation equipment, which has the advantages of small heat loss, long heat preservation time, energy saving, etc. It can also store molten iron to coordinate temporary differences between ironmaking and steelmaking. Balanced state. At the same time, it can replace the mixed iron furnace and ordinary molten iron tank car for steelmaking, and can also complete desulfurization, dephosphorization and other operating procedures during the transportation of molten iron. [0003] Usually, after clay bricks or high-alumina bricks are built on the permanent layer of the torpedo tank, a layer of high-alumina castable with a thickness of about 10-30mm is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3217C04B2235/3418C04B2235/3463C04B2235/349C04B2235/5212C04B2235/9607
Inventor 姚亚双雷中兴徐志华蔡长秀郑吉红
Owner WUGANG REFRACTORY CO LTD
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