Zirconium oxide tundish pure zirconium water gap and manufacturing process thereof

Abstract

The invention discloses a zirconium oxide tundish pure zirconium water gap. The water gap is composed of a zirconium core brick and an iron cover, wherein the zirconium core brick in the tundish pure zirconium water gap is prepared from the following raw materials in parts by weight: 90-96 parts of zirconium oxide, 6-8 parts of basic magnesium carbonate, 0.5-1 part of iridium oxide, 0.2-0.8 part of strontium oxide, binding agent which consists of 1-2 parts of dextrin and 3-4 parts of water, and auxiliary materials including 15-30 parts of electrically fused calcium oxide stabilized zirconium oxide and 2-3 parts of a polypropylene with a mass ratio of 1:10. Furthermore, the invention discloses a manufacturing process of the zirconium oxide tundish pure zirconium water gap. The process disclosed by the invention can be used for enhancing the stability of the zirconium oxide, and the auxiliary materials added in melting process can guarantee moulding density and blank strength and can control product shrinkage within 7-9%; and the zirconium oxide tundish pure zirconium water gap prepared by the invention can be used for greatly improving the service life, the erosion resistance performance and thermal shock performance.

Description

technical field [0001] The invention belongs to the technical field of production and processing of zirconium products, and in particular relates to a pure zirconium nozzle for a zirconia tundish and a manufacturing process thereof. Background technique [0002] With the development of industry, the conditions for the fire resistance of ladle sliding nozzle, tundish sizing nozzle and tundish upper nozzle have become increasingly stringent. In order to improve the life of the nozzle brick, it is necessary to prevent it from reacting with the molten material, so choosing better refractory materials is also the general trend. [0003] At present, the part of the nozzle brick in contact with molten steel is generally composed of one or two of zirconia and zircon sand, but this kind of service life is short and cannot meet the use requirements. Contents of the invention [0004] Purpose of the invention: The purpose of the present invention is to address the deficiencies of th...

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Problems solved by technology

[0003] At present, the part of the nozzle brick contacting molten steel is generally composed of one or two of zirconia and zircon sand, but this kind of service life is short and cannot meet the use requirements.

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