Zirconium oxide tundish pure zirconium water gap and manufacturing process thereof

A manufacturing process and technology of zirconia, which is applied in the field of zirconia tundish pure zirconium nozzle and its manufacturing process, can solve the problems of unsatisfactory use requirements, short service life, etc., and achieve the effect of enhancing stability and improving the scouring performance of molten steel

Active Publication Date: 2013-07-10
TAICANG HONGDA JUNMENG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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  • Zirconium oxide tundish pure zirconium water gap and manufacturing process thereof
  • Zirconium oxide tundish pure zirconium water gap and manufacturing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] Table 1 lists the composition (mass parts) and performance of the pure zirconium nozzle of the zirconia tundish of the present invention

[0034] The composition (mass parts) and characteristic of table 1 embodiment of the present invention

[0035]

[0036] It can be seen from the table that the present invention has the advantages of high pressure resistance, thermal shock resistance and erosion resistance. Under the condition of using high-alloy steel, the pure zirconium nozzle brick in the zirconia tundish of the present invention can pass through more than 700 tons of molten steel.

[0037] figure 1 It is a schematic diagram of Example 1 of the present invention. The center of the semi-finished product 1 after cutting is a hollow cylinder 3. When the temperature of the iron shell suit 2 is between 700°C and 800°C, the iron shell suit 2 is shrunk and cooled by air naturally. Fastened on the cutting semi-finished product 1, wherein the iron shell suit 2 is made ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/482C04B35/622
Inventor 严建忠
Owner TAICANG HONGDA JUNMENG NEW MATERIAL
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