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Ladle castable for smelting of high manganese steel, and preparation method of ladle castable

A technology for ladle casting and high manganese steel, applied in the field of ladle castables, can solve the problems of reducing the service life of refractory materials, peeling and damage of refractory materials, unfavorable control of elements in steel, etc. Good shock stability

Active Publication Date: 2018-06-01
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, under the erosion of molten steel, refractory materials are easy to peel off and damage, which reduces the service life of refractory materials and affects the cleanliness of molten steel.
The current ladle refractory material corrodes quickly during the smelting process of high manganese steel, and it is not good for the control of elements in the steel, which restricts the production of high manganese steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A ladle castable for smelting high manganese steel and a preparation method thereof.

[0036] Using 43-53wt% microporous corundum particles and 19-27% magnesium-aluminum spinel particles as aggregates, 11-15wt% microporous corundum fine powder, 2-4wt% magnesium-aluminum spinel fine powder, 4 ~5wt% pseudoboehmite, 2~4wt% ρ-Al 2 o 3Fine powder, 0.1-1wt% monoclinic zirconia fine powder and 0.7-1.5wt% manganese powder are used as the matrix, and the sum of the aggregate and the matrix is ​​the raw material; 0.04-0.08wt% of the raw material Organic fiber, 0.1-0.5wt% polycarboxylate water reducer, 0.2-0.5wt% maleic acid and 0.01-0.03wt% defoamer are additives.

[0037] Firstly premix the base and the admixture, add 4-7wt% water of the raw material, and stir for 2-4 minutes to obtain a premix. Install the mold, sprinkle the aggregate into the mold evenly, pour the premix into the mold, vibrate and shape, keep warm at 110-170°C for 36-48 hours, and demould to obtain high man...

Embodiment 2

[0040] A ladle castable for smelting high manganese steel and a preparation method thereof.

[0041] 48-58wt% microporous corundum particles and 16-24wt% magnesium-aluminum spinel particles are used as aggregates, 9-13wt% microporous corundum fine powder, 2-4wt% magnesium-aluminum spinel powder, 5-6wt% pseudo-boehmite, 2-4wt% ρ-Al 2 o 3 Fine powder, 0.1-1wt% monoclinic zirconia fine powder and 0.5-1.3wt% manganese powder are used as the matrix, and the sum of the aggregate and the matrix is ​​the raw material; 0.04-0.08wt% of the raw material Organic fiber, 0.1-0.5wt% polycarboxylate water reducer, 0.2-0.5wt% maleic acid and 0.01-0.03wt% defoamer are additives.

[0042] Premix the base and the additive, add 5-8wt% water of the raw material, and stir for 2-4 minutes to obtain a premix. Install the mold, sprinkle the aggregate into the mold evenly, pour the premixed material into the mold, vibrate and shape, keep warm at 120-180°C for 28-40 hours, and demould to obtain high m...

Embodiment 3

[0045] A ladle castable for smelting high manganese steel and a preparation method thereof.

[0046] 53-63wt% microporous corundum particles and 13-21wt% magnesium-aluminum spinel particles are used as aggregates, 7-11wt% microporous corundum fine powder, 2-4wt% magnesium-aluminum spinel powder, 6-7wt% pseudo-boehmite, 2-4wt% ρ-Al 2 o 3 Fine powder, 0.1-1wt% monoclinic zirconia fine powder and 0.3-1.1wt% manganese powder are used as the matrix, and the sum of the aggregate and the matrix is ​​the raw material; 0.04-0.08wt% of the raw material Organic fiber, 0.1-0.5wt% polycarboxylate water reducer, 0.2-0.5wt% maleic acid and 0.01-0.03wt% defoamer are additives.

[0047] Premix the base and the additive, add 6-9 wt% water of the raw material, and stir for 2-4 minutes to obtain the premix. Install the mold, sprinkle the aggregate into the mold evenly, then pour the premix into the mold, vibrate and shape, keep warm at 130-190°C for 20-32 hours, demould, and obtain high mangan...

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Abstract

The invention relates to a ladle castable for smelting of high manganese steel, and a preparation method of the ladle castable. The ladle castable is characterized in that 43-68 wt% of microporous corundum particles and 10-27 wt% of magnesium aluminate spinel particles are taken as aggregate, 5-15 wt% of microporous corundum fine powder, 2-4 wt% of magnesium aluminate spinel micro-powder, 4-8 wt%of pseudo-boehmite, 2-4 wt% of rhop-Al2O3 fine powder, 0.1-1 wt% of monoclinic phase zirconia fine powder and 0.1-1.5 wt% of manganese powder are used as matrix, and the aggregate and the matrix are taken as raw materials; organic fibers with an amount being 0.04-0.08wt% of the weight of the raw materials, a polycarboxylic acid water reducer with an amount being 0.1-0.5wt% of the weight of the rawmaterials, maleic acid with an amount being 0.2-0.5wt% of the weight of the raw materials and a defoaming agent with an amount being 0.01-0.03wt% of the weight of the raw materials are taken as additives. The preparation method comprises the steps of mixing the matrix, the additives and water to obtain a premix; spreading the aggregate into a mould, then pouring the premix into the mould, molding, drying, and demoulding to obtain the ladle castable for the smelting of the high manganese steel. The ladle castable is high in strength, good in thermal shock resistance, scouring-resistant and excellent in steel slag erosion resistance, and can improve the quality of the high manganese steel.

Description

technical field [0001] The invention belongs to the technical field of ladle castables. In particular, it relates to a ladle castable for smelting high manganese steel and a preparation method thereof. Background technique [0002] Since the early 19th century, scientists have studied the application of manganese in steel, and then people found that manganese in steel can not only increase the hardness of steel, but also ensure that the ductility and toughness of steel do not decrease. Low-manganese steel with a manganese content of less than 3% has poor toughness. When the manganese content in the steel is greater than 13%, the strength and toughness of the steel increase. In the early days, 11% to 14% manganese steel was mainly used in military fields such as helmets, armored tanks, and armor-piercing projectile warheads. Today, high-manganese steel has been widely used in metallurgy, mining, building materials, automobiles, agricultural machinery, military industries and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/106
CPCC04B35/106C04B2235/3222C04B2235/405C04B2235/5212
Inventor 黄奥王雅杰顾华志付绿平张美杰邹永顺
Owner WUHAN UNIV OF SCI & TECH
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