Stemming for blast furnace tap hole and preparation method thereof

A blast furnace tapping and tap mud technology, applied in the field of tap clay, can solve the problems of molten iron infiltration, frequent maintenance of tap holes, poor scour resistance of tap mud, etc., reducing production costs, being beneficial to resource utilization, and reducing volume. The effect of stability improvement

Active Publication Date: 2019-12-20
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] "Anhydrous taphole mud for blast furnace taphole and its preparation method" (CN103044040A) patented technology, which uses brown corundum, high alumina bauxite, silicon carbide, soft clay, coke powder, silica and ferrosilicon nitride As raw material, it can basically meet the needs of taphole mud, but the blasthole mud of the invention has poor erosion resistance, and the loss during service will make molten iron continuously infiltrate, resulting in frequent maintenance of tapholes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A blast furnace taphole clay and a preparation method thereof. The preparation method described in this embodiment is:

[0040] 3-8wt% ferrotitanium slag particles, 8-10wt% corundum particles and 10-12wt% coke are used as aggregates, 12-15wt% ferrotitanium slag fine powder, 5-6wt% corundum fine powder, 22-25wt% of silicon carbide, 16-18wt% of clay, 7-8wt% of sericite, 4-5wt% of kyanite and 6-8wt% of ferrosilicon nitride are used as the matrix.

[0041] First add 4-5 wt% of the binder to the aggregate, which accounts for the sum of the aggregate and the matrix, stir for 8-10 minutes, then add the matrix and mix to obtain a premix; then add the premix to the premix Add 8-11wt% of the binder accounting for the sum of the aggregate and the matrix, continue stirring for 10-12 minutes, and then squeeze it into blocks with a mud extruder to obtain blast furnace taphole mud.

[0042] The corundum is one of tabular corundum, white corundum and brown corundum.

Embodiment 2

[0044] A blast furnace taphole clay and a preparation method thereof. The preparation method described in this embodiment is:

[0045] 8-12wt% ferrotitanium slag particles, 7-8wt% corundum particles and 12-14wt% coke are used as aggregates, 8-12wt% ferrotitanium slag fine powder, 6-7wt% corundum fine powder, 20-22wt% of silicon carbide, 14-16wt% of clay, 6-7wt% of sericite, 5-6wt% of kyanite and 8-10wt% of ferrosilicon nitride are used as the matrix.

[0046] First add 4-5 wt% of the binder to the aggregate, which accounts for the sum of the aggregate and the matrix, stir for 8-10 minutes, then add the matrix and mix to obtain a premix; then add the premix to the premix Add 8-11wt% of the binder accounting for the sum of the aggregate and the matrix, continue stirring for 10-12 minutes, and then squeeze it into blocks with a mud extruder to obtain blast furnace taphole mud.

[0047] The corundum is a mixture of any two of tabular alumina, white corundum and brown corundum. ...

Embodiment 3

[0049] A blast furnace taphole clay and a preparation method thereof. The preparation method described in this embodiment is:

[0050] 12-16wt% ferrotitanium slag particles, 6-7wt% corundum particles and 14-16wt% coke are used as aggregates, 5-8wt% ferrotitanium slag fine powder, 7-8wt% corundum fine powder, 17-20wt% of silicon carbide, 12-14wt% of clay, 5-6wt% of sericite, 6-7wt% of kyanite and 10-12wt% of ferrosilicon nitride are used as the matrix.

[0051] First add 4-5 wt% of the binder to the aggregate, which accounts for the sum of the aggregate and the matrix, stir for 8-10 minutes, then add the matrix and mix to obtain a premix; then add the premix to the premix Add 8-11wt% of the binder accounting for the sum of the aggregate and the matrix, continue stirring for 10-12 minutes, and then squeeze it into blocks with a mud extruder to obtain blast furnace taphole mud.

[0052] The corundum is a mixture of tabular corundum, white corundum and brown corundum.

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Abstract

The invention relates to stemming for a blast furnace tap hole and a preparation method thereof. The technical scheme includes: taking 3-20wt% of titanium-iron slag particles, 5-10wt% of corundum particles and 10-18wt% of coke as aggregate, and adopting 2-15wt% of titanium-iron slag fine powder, 5-10wt% of corundum fine powder, 15-25wt% of silicon carbide, 10-18wt% of clay, 4-8wt% of sericite, 4-8wt% of kyanite and 6-14wt% of ferrosilicon nitride as the matrix; firstly adding a binding agent accounting for 4-5wt% of the sum of the aggregate and the matrix into the aggregate, performing stirring, then adding the matrix, and performing mixing to obtain a premix; and then adding the binding agent accounting for 8-11wt% of the sum of the aggregate and the matrix into the premix, further performing stirring, and then extruding the mixture into blocks by a mud extruder, thus obtaining the stemming for the blast furnace tap hole. The method provided by the invention is low in production cost,the prepared product has small volume density, good volume stability, good air permeability, high compressive strength and good erosion resistance, and can reach the effects of repairing and maintaining the blast furnace tap hole.

Description

technical field [0001] The invention belongs to the technical field of gun clay. In particular, it relates to a blast furnace tap hole clay and a preparation method thereof. Background technique [0002] Gun clay is a necessary refractory material in the iron and steel metallurgy industry. If the quality of gun clay is poor, a series of problems will occur during use and affect normal production. Therefore, blasting mud is required: good working performance, which can fully fill the iron hole; good volume stability, no shrinkage during service; good sintering performance, which can be quickly sintered to produce strength; good slag resistance, molten iron erosion, erosion performance and Antioxidant properties. [0003] At present, blast furnaces are developing towards long life, high-intensity smelting and large-scale development, and the quality requirements for blast furnace taphole mud are becoming more and more stringent. On the premise of cost control, the material ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/565C04B35/622C04B35/634
CPCC04B35/66C04B35/565C04B35/62204C04B35/63496C04B2235/422C04B2235/3217C04B2235/349C04B2235/3463C04B2235/3472C04B2235/3873C04B2235/3852C04B2235/5427C04B2235/5436C04B2235/77C04B2235/96C04B2235/9669
Inventor 梁永和鞠茂奇聂建华蔡曼菲
Owner WUHAN UNIV OF SCI & TECH
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