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Ceramic filter for continuous casting tundish and method for preparing the same

A ceramic filter and continuous casting technology, applied in the field of continuous casting refractories, can solve problems such as difficulty in making and using filters, and achieve the effects of removing impurities in a wide range of particle sizes, not easy to block, and improving the cleanliness of molten steel.

Active Publication Date: 2015-09-30
WUHAN UNIV OF SCI & TECH
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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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A ceramic filter for continuous casting tundish and a preparation method thereof. With 50-55wt% calcium carbonate particles, 12-15wt% corundum particles and 5-10wt% magnesium-aluminum spinel particles as aggregates, 1-3wt% pre-melted dodecacalcium heptaaluminate particles, 10 ~13wt% of monocalcium aluminate fine powder, 6~10wt% of calcium dialuminate fine powder and 4~5wt% of pre-melted heptaaluminate dodecacalcium fine powder are used as matrix, so as to account for the aggregate and the The matrix and 4~7wt% silicone resin is the binder. Mix and grind the binder and the aggregate evenly according to the above content, then add the matrix and mix and grind for 3 to 7 minutes to obtain a mixture. Then vibrating and pressurizing, demolding, and keeping warm for 6-36 hours under the condition of 180-320° C., to obtain a ceramic filter for continuous casting tundish.

[0030] The ceramic filter for continuous casting tundish prepared in this example is used in a two-stra...

Embodiment 2

[0032] A ceramic filter for continuous casting tundish and a preparation method thereof. With 55-60wt% calcium carbonate particles, 9-13wt% corundum particles and 5-10wt% magnesium-aluminum spinel particles as aggregates, 1-3wt% pre-melted heptaaluminate dodecacalcium particles, 10 ~13wt% of monocalcium aluminate fine powder, 6~10wt% of calcium dialuminate fine powder and 4~5wt% of pre-melted heptaaluminate dodecacalcium fine powder are used as matrix, so as to account for the aggregate and the The matrix and 4~7wt% silicone resin is the binder. Mix and grind the binder and the aggregate evenly according to the above content, then add the matrix and mix and grind for 3 to 7 minutes to obtain a mixture. Then vibrating and pressurizing, demolding, and keeping warm for 6-36 hours under the condition of 180-320° C., to obtain a ceramic filter for continuous casting tundish.

[0033] The ceramic filter for continuous casting tundish prepared in this example is used in a four-stra...

Embodiment 3

[0035] A ceramic filter for continuous casting tundish and a preparation method thereof. With 60-65wt% calcium carbonate particles, 6-10wt% corundum particles and 2-6wt% magnesium-aluminum spinel particles as aggregates, 3-5wt% pre-melted calcium heptaaluminate particles, 12 ~15wt% monocalcium aluminate fine powder, 4~8wt% calcium dialuminate fine powder and 5~6wt% pre-melted dodecacalcium heptaaluminate fine powder are used as matrix, to account for the aggregate and the The matrix and 2~4wt% silicone resin is the binder. Mix and grind the binder and the aggregate evenly according to the above content, then add the matrix and mix and grind for 3 to 7 minutes to obtain a mixture. Then vibrating and pressurizing, demolding, and keeping warm for 6-36 hours under the condition of 180-320° C., to obtain a ceramic filter for continuous casting tundish.

[0036] The ceramic filter for continuous casting tundish prepared in this example is used in a two-strand special-shaped billet...

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Abstract

The invention relates to a ceramic filter for a continuous casting tundish and a method for preparing the same. The technical scheme is that 50-70wt% of calcium carbonate particles, 2-15wt% of corundum particles and 2-10wt% of magnesia-alumina spinel particles serve as aggregate; 1-5wt% of prefused dodecacalcium hepta-aluminate particles, 10-15wt% of fine monocalcium aluminate powder and 4-10wt% of fine calcium dialuminate powder and 4-6wt% of prefused fine dodecacalcium hepta-aluminate powder serve as substrates; and silicone resin that accounts for 2-7wt% of the sum of the aggregate and the substrates serves as a binding agent. The binding agent and the aggregate are mixed and ground evenly, and the substrates are added to be mixed and ground for 3-7 min to obtain a mixture; vibrating pressure forming is performed, demolding is performed, and the mixture undergoes heat preservation for 6-36 h at 180-320 DEG C to obtain the ceramic filter for the continuous casting tundish. The ceramic filter for the continuous casting tundish has the advantages of wide impurity-removing particle size range, high efficiency, insusceptibility to blockage, high strength, washing 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 ceramic filter for continuous casting tundish and a preparation method thereof. Background technique [0002] As people's requirements for the cleanliness of steel are increasing day by day, reducing inclusions in steel by various means has become the focus of research by metallurgists. The tundish has been paid more and more attention for its special advantages of removing inclusions. There are many ways to remove inclusions in the tundish, and installing ceramic filters is currently the most effective way. The ceramic filter is installed on the slag retaining wall of the tundish, which has the functions of removing non-metallic inclusions in molten steel, improving the cleanliness of molten steel, reducing nozzle nodulation, avoiding nozzle blockage, ensuring smooth continuous casting, improving billet quality and reducing production cost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 黄奥顾华志付绿平
Owner WUHAN UNIV OF SCI & TECH
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