Renewable ceramic filter for continuous casting tundish and preparation method thereof

A ceramic filter and continuous casting technology, applied in foundry equipment, casting melt containers, manufacturing tools, etc., can solve the problems of difficulty in making and using filters, failure, and inability to reuse, and achieve corrosion resistance and heat resistance. Excellent shock performance, wide particle size range, and the effect of improving cleanliness

Active Publication Date: 2017-03-01
WUHAN UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, CaO is easy to hydrate, which makes it difficult to make and use this filter
At the same time, after use, the ceramic filter fails due to the adsorption of a large number of inclusions, and cannot be reused.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A renewable ceramic filter for continuous casting tundish and a preparation method thereof. With 40-45wt% calcium carbonate particles, 26-30wt% corundum particles and 3-5wt% pre-melted dodecacalcium heptaaluminate particles as aggregates, 10-13wt% monocalcium aluminate fine powder, 6 ~10wt% calcium dialuminate fine powder and 5~6wt% pre-melted calcium heptaaluminate dodecaaluminate fine powder are used as matrix, with 0.04~0.10wt% organic fiber and 0.08~ 0.15wt% polycarboxylic acid dispersion water reducer is an admixture. According to the above content, the binder and the matrix are uniformly mixed and ground, and then aggregates are added and mixed to obtain a mixture. Then add water accounting for 4-6 wt% of the sum of the aggregate and the matrix to the mixture, stir evenly, cast and vibrate to form, maintain at room temperature for 12-48 hours, and demould. Finally, it is dried at 110-200°C for 12-36 hours, and kept at 1200-1700°C for 0.5-6 hours to obtain a rene...

Embodiment 2

[0036]A renewable ceramic filter for continuous casting tundish and a preparation method thereof. With 45-50wt% calcium carbonate particles, 22-26wt% corundum particles and 3-5wt% pre-melted heptaaluminate dodecaaluminate particles as aggregates, 10-13wt% monocalcium aluminate fine powder, 6 ~10wt% calcium dialuminate fine powder and 5~6wt% pre-melted calcium heptaaluminate dodecaaluminate fine powder are used as matrix, with 0.04~0.10wt% organic fiber and 0.08~ 0.15wt% polycarboxylic acid dispersion water reducer is an admixture. According to the above content, the binder and the matrix are uniformly mixed and ground, and then aggregates are added and mixed to obtain a mixture. Then add water accounting for 4-6 wt% of the sum of the aggregate and the matrix to the mixture, stir evenly, cast and vibrate to form, maintain at room temperature for 12-48 hours, and demould. Finally, it is dried at 110-200°C for 12-36 hours, and kept at 1200-1700°C for 0.5-6 hours to obtain a ren...

Embodiment 3

[0041] A renewable ceramic filter for continuous casting tundish and a preparation method thereof. With 50-55wt% calcium carbonate particles, 18-22wt% corundum particles and 1-3wt% pre-melted dodecaaluminate heptaaluminate particles as aggregates, 12-15wt% monocalcium aluminate fine powder, 4 ~7wt% calcium dialuminate fine powder and 4~5wt% pre-melted calcium heptaaluminate dodecaaluminate fine powder are used as matrix, with 0.04~0.10wt% organic fiber and 0.08~ 0.15wt% polycarboxylic acid dispersion water reducer is an admixture. According to the above content, the binder and the matrix are uniformly mixed and ground, and then aggregates are added and mixed to obtain a mixture. Then add water accounting for 4-6 wt% of the sum of the aggregate and the matrix to the mixture, stir evenly, cast and vibrate to form, maintain at room temperature for 12-48 hours, and demould. Finally, it is dried at 110-200°C for 12-36 hours, and kept at 1200-1700°C for 0.5-6 hours to obtain a ren...

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Abstract

The invention relates to a renewable ceramic filter for continuous casting tundish and a preparation method thereof. According to the technical scheme, 40 to 60wt% of the calcium carbonate particles, 15 to 30wt% of corundum particles and 1 to 5wt% of pre-melting '12:7'calcium aluminate particles serve as aggregate, 10 to 15wt% of monocalcium aluminate fine powder, 4 to 10wt% of calcium dialuminate fine powder and 4 to 6wt% of pre-melting '12:7'calcium aluminate fine powder serve as substrate, and organic fiber accounting for 0.04 to 0.10wt% of the sum of the aggregate and the substrate and polycarboxylate superplasticizer accounting for 0.08 to 0.15wt% thereof as admixture. The method includes: grind-mixing evenly the binding agent and the substrate according to the content mentioned above, and adding the aggregate to grind-mix so as to obtain a mixed material; adding water accounting for 4 to 6wt% of the sum of the aggregate and the substrate, performing evenly mixing, forming, curing, demolding and drying, and holding the temperature at 1200 to 1700 DEG C for 0.5 to 6 hours to obtain the renewable ceramic filter for the continuous casting tundish. The renewable ceramic filter has the advantages of wide range of purified particle size, high efficiency, little possibility of plugging, erosion resistance and long service life.

Description

technical field [0001] The invention belongs to the technical field of continuous casting refractories. In particular, it relates to a renewable ceramic filter for continuous casting tundish and a preparation method thereof. Background technique [0002] As people's requirements for steel quality are increasing day by day, various ladle refining technologies have been developed, the purpose of which is to improve the cleanliness, but it may be polluted again after being poured into the tundish. Therefore, the tundish is not only a simple transition vessel for molten steel, but an important continuous metallurgical reactor. For this reason, the concept of tundish metallurgy has been put forward and has been widely valued by people. [0003] In order to produce high-purity steel, measures such as retaining wall and dam, argon blowing, and ceramic filter are adopted in the continuous casting process, especially in the tundish, which can greatly reduce non-metallic inclusions i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66B22D41/00
Inventor 黄奥顾华志付绿平刘星熊明继郭城成
Owner WUHAN UNIV OF SCI & TECH
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