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High-alumina flow distribution water port and preparation method thereof

A nozzle and high-alumina technology, which is applied in the field of high-alumina cloth nozzle and its preparation, can solve the problems of no refractory components, achieve good thermal shock resistance, high temperature resistance, and improve quality

Inactive Publication Date: 2016-09-21
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the newly developed twin-roll thin strip continuous casting technology in the metallurgical field, there are no key refractory components such as distribution nozzles for refractory materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A high-alumina cloth spout and a preparation method thereof. 25~30wt% super bauxite clinker large particles, 20~25wt% super bauxite clinker medium particles, 15~20wt% mullite small particles, 25~27wt% corundum fine powder and 7~10wt% calcium aluminate cement is used as a mixture, and 0.08~0.10wt% sodium tripolyphosphate, 0.03~0.05wt% sodium hexametaphosphate and 6.0~8.0wt% water are added to the mixture, and then the The mixed material, sodium tripolyphosphate, sodium hexametaphosphate and water are added into a mixer and kneaded to obtain a mixed sludge.

[0025] Add the mixed mud into the mold, and mechanically shape it to obtain a slit-type high-alumina cloth nozzle blank, dry the slit-type high-alumina cloth nozzle blank at 110-140°C, and Keep warm at 500-550°C for 10-12 hours to make a slit-type high-alumina cloth nozzle.

Embodiment 2

[0027] A high-alumina cloth spout and a preparation method thereof. With 30~35wt% large mullite particles, 15~20wt% super bauxite clinker medium particles, 15~20wt% mullite small particles, 25~27wt% super bauxite clinker fine powder , 6~8wt% calcium aluminate cement and SiO 2 The mixture of fine powder (in the mixture described in this embodiment: 30wt% is SiO 2 Micropowder, 70wt% is calcium aluminate cement) as a mixture, plus 0.07~0.09wt% sodium tripolyphosphate, 0.03~0.08wt% sodium hexametaphosphate and 5.5~7.0wt% water of the mixture, and then The mixed material, sodium tripolyphosphate, sodium hexametaphosphate and water are put into a mixer and kneaded to obtain mixed sludge.

[0028] Add the mixed mud into the mold and mechanically form it to obtain a perforated high-alumina cloth spout blank, dry the perforated high-alumina cloth spout blank at 110-140°C, and Insulate at 550-600°C for 9-11 hours to obtain a perforated high-alumina cloth nozzle.

Embodiment 3

[0030] A high-alumina cloth spout and a preparation method thereof. With 25~30wt% large mullite particles, 15~20wt% mullite medium particles, 20~25wt% super bauxite clinker small particles, 24~26wt% corundum fine powder, 5~7wt% ρ-Al 2 o 3 Micropowder and SiO 2 The mixture of fine powder (in the mixture described in this embodiment: 30wt% is SiO 2 Micropowder; 70wt% is ρ-Al 2 o 3 Micropowder) as a mixture, add 0.12~0.16wt% sodium tripolyphosphate and 6.0~7.5wt% water to the mixture, then add the mixture, sodium tripolyphosphate and water into the mixer and knead , to obtain mixed mud.

[0031] Add the mixed mud into the mold and mechanically form it to obtain a perforated high-alumina cloth spout blank, dry the perforated high-alumina cloth spout blank at 110-140°C, and Heat preservation at 600~650°C for 8~10 hours to make a hole-type high-alumina fabric outlet.

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PUM

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Abstract

The invention relates to a high-alumina flow distribution water port and a preparation method thereof. The technical scheme is that a mixture, a surfactant accounting for 0.10wt%-0.22wt% of the mixture and water accounting for 5.5wt%-8.0wt% of the mixture are mixed in a mixer, and a mixed cement material is obtained, wherein the mixture is prepared from 25wt%-35wt% of high-alumina raw material large particles, 15wt%-25wt% of high-alumina raw material medium particles, 15wt%-25wt% of high-alumina raw material small particles, 23wt%-27wt% of high-alumina raw material fine powder and 3wt%-10wt% of a binding agent; then the mixed cement material is added to a mold and subjected to mechanical molding, a high-alumina flow distribution water port blank is prepared, dried and subjected to heat preservation at the temperature of 500-650 DEG C for 8-12 h, and the high-alumina flow distribution water port is prepared. The high-alumina flow distribution water port has the characteristics of good high-temperature resistance, good thermal shock resistance, good high-temperature liquid metal erosion resistance and good flow distribution effect and meets the use requirements of a continuous casting technology for twin-roll thin strips.

Description

technical field [0001] The invention belongs to the technical field of distribution nozzles. In particular, it relates to a high-aluminum cloth spout and a preparation method thereof. Background technique [0002] The twin-roll thin strip continuous casting technology is to pour liquid metal directly into the molten pool formed by two counter-rotating water-cooled crystallization rolls and cloth nozzles (refractory materials), and rapidly cool through the water-cooled crystallization rolls (cooling rate is 10~1000 ℃ / s) and rolling to obtain a thin strip with a thickness of 1~5mm. Compared with the traditional large slab continuous casting and thin slab continuous casting process, the twin-roll thin strip continuous casting technology can greatly reduce infrastructure and equipment investment, energy consumption and environmental pollution by simplifying the process. The solidification process can cause significant changes in the microstructure of the cast material, such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/9676
Inventor 祝洪喜骆中汉邓承继余超员文杰丁军朱清友
Owner WUHAN UNIV OF SCI & TECH