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Refractory casting material for ladle splash guard and preparation method of refractory casting material

A technology for refractory castables and molten iron, which is applied in the field of castables for ladle, can solve the problems of reducing the corrosion resistance of refractory materials to molten iron/slag, improving the development cost and high cost of refractory materials for splash guards, and improving the resistance to molten iron/slag. Slag aggressiveness, labor-saving, high-density effect

Active Publication Date: 2016-05-04
河南胜诚耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the microcracks caused by the difference in thermal expansion coefficient of "corundum mullite castables", the corrosion resistance of refractory materials to molten iron / slag is reduced
[0006] In addition, corundum and mullite are high-grade refractory raw materials with high cost, which increases the development cost of refractory materials for splash guards

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A refractory castable for a ladle splash guard and a preparation method thereof. The preparation method of this embodiment is:

[0031] With 61~65wt% ferrochrome slag particles as aggregate, 14~16wt% ferrochrome slag fine powder, 16~18wt% Cr 7 C 3 Fine powder, 1~3wt% zirconia micropowder and 2~4wt% flake graphite micropowder are base materials; according to the content of the above aggregate and base material, first mix the base material, and then add the mixed base material In the aggregate, mix evenly to obtain the mixture; then add 3~6wt% silica sol to the mixture, stir evenly, vibrate and form, and maintain at room temperature for 12~24 hours; finally keep warm at 90~110°C 12~24h, the refractory castable for ladle splash guard is prepared.

[0032] The refractory castable for the ladle splash guard prepared in this example is measured: the bulk density is 2.79~2.81g cm -3 ; 1450 ℃ × 3h line change rate after burning 0.12 ~ 0.14%; 1450 ℃ static crucible method sl...

Embodiment 2

[0034] A refractory castable for a ladle splash guard and a preparation method thereof. The preparation method of this embodiment is:

[0035] With 63~67wt% ferrochrome slag particles as aggregate, 13~15wt% ferrochrome slag fine powder, 15~17wt% Cr 7 C 3 Fine powder, 1~3wt% zirconia micropowder and 2~4wt% flake graphite micropowder are base materials; according to the content of the above aggregate and base material, first mix the base material, and then add the mixed base material In the aggregate, mix evenly to obtain the mixture; then add 3~6wt% silica sol to the mixture, stir evenly, vibrate and form, and maintain at room temperature for 12~24 hours; finally keep warm at 90~110°C 12~24h, the refractory castable for ladle splash guard is prepared.

[0036] The refractory castable for the ladle splash guard prepared in this example is measured: the bulk density is 2.80~2.82g cm -3 ; 1450 ℃ × 3h line change rate after burning 0.13 ~ 0.15%; 1450 ℃ static crucible method sl...

Embodiment 3

[0038] A refractory castable for a ladle splash guard and a preparation method thereof. The preparation method of this embodiment is:

[0039]With 65~69wt% ferrochrome slag particles as aggregate, 12~14wt% ferrochrome slag fine powder, 14~16wt% Cr 7 C 3 Fine powder, 2~4wt% zirconia micropowder and 3~5wt% flake graphite micropowder are base materials; according to the content of the above aggregate and base material, first mix the base material, and then add the mixed base material In the aggregate, mix evenly to obtain the mixture; then add 4~7wt% silica sol to the mixture, stir evenly, vibrate and shape, and maintain at room temperature for 12~24 hours; finally keep warm at 90~110°C 12~24h, the refractory castable for ladle splash guard is prepared.

[0040] The refractory castable for the ladle splash guard prepared in this example is measured: the bulk density is 2.81~2.83g cm -3 ; 1450 ℃ × 3h line change rate of 0.14 ~ 0.16%; 1450 ℃ static crucible method slag resistan...

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Abstract

The invention relates to a refractory casting material for a ladle splash guard and a preparation method of the refractory casting material. According to the technical scheme, the refractory casting material is prepared by taking 61-71wt% of ferrochrome slag as aggregate, 11-16wt% of fine ferrochrome slag powder, 13-18wt% of fine powder of Cr7-C3, 1-4wt% of zirconia micro powder and 2-5 wt% of crystalline flake graphite micro powder as matrix materials, firstly, uniformly mixing the matrices, adding the uniformly mixed matrix materials into the aggregate, and mixing, thereby obtaining a mixed material; subsequently, adding silica sol which accounts for 3-7wt% of the mixed material, stirring, molding, and maintaining for 12-24 hours at the room temperature; finally, keeping the temperature for 12-24 hours at 90-110 DEG C, thereby preparing the refractory casting material for the ladle splash guard. The preparation method has the characteristics of low cost and simple process, and the refractory casting material for the ladle splash guard is high in density, good in volume stability and high in anti-molten iron / slag corrosion.

Description

technical field [0001] The invention belongs to the technical field of castables for ladles. In particular, it relates to a refractory castable for a ladle splash guard and a preparation method thereof. Background technique [0002] With the development of iron and steel smelting technology, "three removals" (desulfurization, dephosphorization, and desiliconization) pretreatment and impurity removal have become an important link in the molten iron smelting process. The "three removal" pretreatment of molten iron is generally carried out in molten iron ladle or torpedo tank car, but the impurity removal reaction of molten iron pretreatment is intense, and the smoke is thick, resulting in violent splashing of molten iron. The ladle must be closed with a splash guard. Therefore, the splash guard of the ladle needs to withstand the hot smoke erosion, temperature fluctuation and erosion of molten iron / slag during the "three removal" pretreatment process of impurity removal. ...

Claims

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Application Information

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IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3244C04B2235/3839C04B2235/425C04B2235/96
Inventor 张寒赵惠忠何晴赵鹏达余俊曹锟曹志明
Owner 河南胜诚耐火材料有限公司
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