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Preparation method of environment-friendly high-slag-corrosion-resistance dry material, and dry material

A technology of green environmental protection and slag erosion, applied in the field of refractory materials for continuous casting, can solve the problems of waste of resources, deep slag, erosion groove marks, etc., and achieve the effect of improving the casting life, reducing the cost of refractory materials, and improving the quality of the casting billet.

Active Publication Date: 2020-10-02
日照瑞华新材料科技有限公司 +2
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Problems solved by technology

[0005] The object of the present invention is to provide a green and environment-friendly high slag erosion resistance dry material preparation method and dry material, and the high slag erosion resistance dry material obtained through the green environmental protection type high slag erosion resistance dry material preparation method can solve the current problem The submerged nozzles used in the current continuous casting workshop with technology exist are directly treated as waste products, resulting in a waste of expensive resources, which does not conform to the concept of resource recycling. At the same time, the current high-grade dry materials are mainly high-purity magnesia. However, when pouring special steel or ultra-clean steel for a long time, there will also be deep slag erosion grooves, which will have a certain impact on the quality of molten steel.

Method used

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  • Preparation method of environment-friendly high-slag-corrosion-resistance dry material, and dry material

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preparation example Construction

[0030] The invention provides a method for preparing a green and environment-friendly high-slag erosion-resistant dry material, which comprises the following steps:

[0031] S1) recycling the waste zirconium carbon slag strands, pulverizing them to obtain regenerated zirconium carbon slag strands;

[0032] S2) According to parts by weight, 65 parts-85 parts of magnesia, 8 parts-15 parts of regenerated zirconium carbon slag strands, 1 part-5 parts of light-burned alumina A powder, 5 parts-13 parts of binder and 3 parts Parts - 5 parts of additives are mixed to prepare a green and environmentally friendly dry material with high resistance to slag erosion.

[0033] Specifically, the recycling process of waste zirconium carbon slag strands:

[0034] Recycling of used submerged nozzles;

[0035] At the recycled waste submerged nozzle, according to the drawing of the submerged nozzle, determine the position of the zirconium carbon slag strand, cut the zirconium carbon slag strand,...

Embodiment 1

[0049] The preparation process of high anti-slag erosion dry material (1):

[0050] Recycling the waste submerged nozzle of a steel factory;

[0051]At the recycled waste immersion nozzle, according to the drawing of the immersion nozzle, determine the position of the zirconium carbon slag strand, use a brick cutter to cut the zirconium carbon slag strand, and use the fiber paper that sticks to the outer surface of the cut zirconium carbon slag strand , Steel slag and cold steel are treated, and the surface is pre-cleaned to obtain pretreated zirconium carbon slag strands;

[0052] The pretreated zirconium carbon slag strands are decarburized by high-temperature decarburization process to obtain decarburized zirconium carbon slag strands, that is, continuous heat preservation in an oxidizing atmosphere at 1100°C for 180 minutes;

[0053] After the decarburization slag strands are cooled, use a file to clean up the debris on the surface of the slag strands, and put them in a c...

Embodiment 2

[0059] The preparation process of high anti-slag erosion dry material (2):

[0060] Recycling the waste submerged nozzle of a steel factory;

[0061] At the recycled waste immersion nozzle, according to the drawing of the immersion nozzle, determine the position of the zirconium carbon slag strand, use a brick cutter to cut the zirconium carbon slag strand, and use the fiber paper that sticks to the outer surface of the cut zirconium carbon slag strand , Steel slag and cold steel are treated, and the surface is pre-cleaned to obtain pretreated zirconium carbon slag strands;

[0062] The pretreated zirconium carbon slag strands are decarburized by high-temperature decarburization process to obtain decarburized zirconium carbon slag strands, that is, continuous heat preservation in an oxidizing atmosphere at 1100°C for 180 minutes;

[0063] After the decarburization slag strands are cooled, use a file to clean up the debris on the surface of the slag strands, and put them in a ...

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Abstract

The invention relates to the technical field of refractory materials for continuous casting, and relates to a preparation method of an environment-friendly high-slag-corrosion-resistance dry material,and the high-slag-corrosion-resistance dry material. The method comprises the following steps: waste zirconium-carbon slag line materials are recycled and smashed to obtain a regenerated zirconium-carbon slag line material; and 65-85 parts by weight of magnesia, 8-15 parts by weight of the regenerated zirconium-carbon slag line material, 1-5 parts by weight of light calcined alumina A powder, 5-13 parts by weight of a binding agent and 3-5 parts by weight of an additive are mixed to prepare the environment-friendly high-slag-corrosion-resistance dry material. The invention aims to provide thepreparation method of the environment-friendly dry material with high slag corrosion resistance, and the dry material with high slag corrosion resistance. The expensive zirconium oxide raw material is reasonably recycled, the high slag corrosion resistance of zirconium oxide is brought into full play, the casting service life of the continuous casting tundish is prolonged, the refractory materialconsumption cost per ton of steel is reduced, pollution of refractory materials to molten steel is reduced, and the casting blank quality is improved.

Description

technical field [0001] The invention relates to the technical field of refractory materials for continuous casting, in particular to a method for preparing a green and environment-friendly dry material with high resistance to slag erosion and the dry material. Background technique [0002] The part of the slag line of the submerged nozzle is used to resist the erosion of the mold slag, and it is usually prepared with a mud material with a content of 75-85 parts of stabilized zirconia. However, the used submerged nozzle continuous casting plant is usually treated as a waste product, because The submerged nozzle contains a large amount of zirconia. The stabilized zirconia is usually used as the slag strand for the submerged nozzle because of its strong resistance to slag erosion. Compared with other refractory materials, it is expensive and Its chemical properties are stable, and it hardly reacts with other substances, so its reasonable recycling is in line with the concept of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/043
CPCC04B35/043C04B2235/3217C04B2235/3244C04B2235/3852C04B2235/428C04B2235/9607
Inventor 刘丽徐业兴郭钰龙汪正峰郝不景胡俊岩李红霞戚静刘振国孙肖肖胡国伟
Owner 日照瑞华新材料科技有限公司
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