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Refractory pouring material used for melten iron desulfur agitator

A refractory castable and molten iron desulfurization technology, which is applied in the field of refractory materials for molten iron desulfurization pretreatment before converter steelmaking, can solve the problem that research work has not received due attention, and achieves improved compactness and slag penetration resistance. The effect of reducing production costs and low prices

Inactive Publication Date: 2007-11-28
武钢集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These unfavorable factors have led to the lack of due attention to the research work on refractory castables for domestic molten iron desulfurization mixers, thus limiting the further improvement of its service life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Prepare 103.15 kg of refractory castable for molten iron desulfurization agitator of the present invention, wherein: the total weight of castable base material is 100 kg, and the total weight of additives is 3.15 kg. The above castable base material is composed of 56 kg of ordinary fused mullite, 8.5 kg of coke gemstone, 5 kg of kyanite, 10 kg of super high alumina, 4 kg of silicon micropowder, and 8 kg of α-Al 2 o 3 Micro powder, 6 kg of pure calcium aluminate cement, 2.5 kg of dense corundum fine powder. The above-mentioned additives are based on 100 kg of castable base material, and are composed of 2 kg of heat-resistant steel fiber, 0.5 kg of aluminum lactate, 0.15 kg of sodium tripolyphosphate, and 0.5 kg of melamine. The above-mentioned 56 kg of ordinary fused mullite has a particle size gradation of 0.1 to 8 mm, of which 22 kg are in the range of 8 to 5 mm, 22 kg are in the range of 5 to 3 mm, and 22 kg are in the range of 3 to 3 mm. There are 4 kg in the range...

Embodiment 2

[0021] Prepare 103.70 kg of refractory castable for molten iron desulfurization agitator of the present invention, wherein: the total weight of castable base material is 100 kg, and the total weight of additives is 3.70 kg. The above castable base material is composed of 65 kg of ordinary fused mullite, 3 kg of coke gemstone, 6 kg of kyanite, 12 kg of super high alumina, 3.5 kg of silicon micropowder, 5 kg of α-Al 2 o 3 Micro powder, 4 kg of pure calcium aluminate cement, 1.5 kg of dense corundum fine powder. 100 kg of castable base material for the above-mentioned additives is the measurement basis, consisting of 2.5 kg of heat-resistant steel fiber, 0.3 kg of aluminum lactate, 0.3 kg of metal aluminum powder, 0.2 kg of sodium tripolyphosphate, and 0.4 kg of melamine. The above-mentioned 65 kg of ordinary fused mullite has a particle size gradation of 0.1 to 8 mm, of which 27 kg are in the range of 8 to 5 mm, 24 kg are in the range of 5 to 3 mm, and 24 kg are in the range of...

Embodiment 3

[0023]Prepare 102.60 kg of refractory castable for molten iron desulfurization agitator of the present invention, wherein: the total weight of castable base material is 100 kg, and the total weight of additives is 2.60 kg. The above castable base material is composed of 55 kg of ordinary fused mullite, 10 kg of coke gemstone, 4 kg of kyanite, 8 kg of super high alumina, 6 kg of silicon micropowder, and 7 kg of α-Al 2 o 3 Micro powder, 8 kg of pure calcium aluminate cement, and 2 kg of dense corundum fine powder. The above-mentioned additives are based on 100 kg of castable base material, and are composed of 1.5 kg of heat-resistant steel fiber, 0.4 kg of aluminum lactate, 0.2 kg of metal aluminum powder, and 0.5 kg of melamine. The above-mentioned 55 kg of ordinary fused mullite has a particle size gradation of 0.1 to 8 mm, of which 21 kg are in the range of 8 to 5 mm, 21 kg are in the range of 5 to 3 mm, and 21 kg are in the range of 3 to 3 mm. There are 4 kg in the range o...

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Abstract

The present invention discloses a refractory pouring material for molten iron desulfurization stirrer. It is formed from pouring material base material and proper quantity of additive. The composition of the base material of pouring material includes (by wt%) 55-65% of general electrofused mullite 3-10% of jiaobaoshi, 3-7% of silicon micropowder, 5-10% of alpha-Al2O3 micropowder, 3-10% of pure calcium aluminate cement and 1.5-2.5% of compact corundum fine powder, and the described additive is formed from heat-resistant steel fibre, aluminium lactate and / or metal aluminium powder and sodium triphosphate and / or trimeric cyanamide.

Description

technical field [0001] The invention belongs to the field of refractory materials for molten iron desulfurization pretreatment before converter steelmaking, and in particular relates to a refractory castable for molten iron desulfurization agitators. Background technique [0002] At present, when metallurgical enterprises at home and abroad carry out stirring desulfurization outside the molten iron furnace before converter steelmaking, the desulfurization agitator used is mainly composed of an internal metal core rod and an external refractory lining, and most of the refractory materials used for the agitator lining are It is a high-purity mullite refractory castable. [0003] Taking the KR hot metal desulfurization agitator used in the No. 2 steelmaking plant of Wuhan Iron and Steel (Group) Company as an example, it can be seen from the production regulations of the agitator that the main raw material of the refractory castable is high-purity fused mull...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B28/06C04B14/04C04B14/48
Inventor 欧阳德刚胡清明罗安智李具中胡铁山刘守堂陈双全张爱平王海青周明石朱善合
Owner 武钢集团有限公司
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