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Continuous Casting Mold Flux of High Titanium Oxide for Titanium-Containing Steel

A technology of mold slag and titanium oxide, which is applied in the field of metallurgy, can solve the problems of not being able to continuously cast multiple furnaces to reduce costs, affect the smooth production of continuous casting, and easily react with high-titanium steel, so as to increase the number and increase the number of continuous casting furnaces , the effect of reducing production costs

Active Publication Date: 2022-05-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problems to be solved by the present invention are: the existing continuous casting mold slag is prone to reaction in the production of high titanium steel, causing mold slag denaturation, affecting the continuous casting production, and not being able to continuously cast multiple furnaces to reduce costs, etc.

Method used

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preparation example Construction

[0041] The raw materials used in the present invention for preparing the mold residue are all common raw materials, with wide sources and low cost. When using the present invention, it is not necessary to use the above-mentioned raw materials for blending, and all raw materials that can make the chemical composition and performance meet the requirements of the mold flux of the present invention can be used.

[0042] Wherein, in the above-mentioned high titanium oxide powder for titanium-containing steel, the titanium content in the titanium-containing steel is 0.1% to 0.8%.

[0043] The present invention also provides a preparation method of the above-mentioned mold slag, comprising the following steps:

[0044] a. Weigh the raw materials according to the weight ratio;

[0045] b. Mix the remaining raw materials other than carbonaceous materials, keep the temperature at 1350-1450 ℃ for 30-50 minutes, so that the raw materials are fully melted and uniform, cooled and dried to ...

Embodiment 1

[0051] Example 1 Continuous casting with high titanium oxide mold slag for titanium-containing steel of the present invention

[0052] The specific operation method is as follows:

[0053] For the production of steel containing 0.11% titanium, the main components of the mold slag are: by weight percentage, CaO 26.8%, BaO 5%, SiO 2 13%, Al 2 O 3 18.3%, BaF2 10.2%, Li2 O 6.5%, B 2 O 3 4%, C 6.4%, TiO 2 10.5%. The physical properties are: melting point 950℃, viscosity 0.202Pa·S at 1300℃.

[0054] The raw materials for the preparation of mold slag for continuous casting of titanium-containing steel are: by weight percentage, limestone 35%, bauxite 15%, barium carbonate 5%, calcium fluoride 8%, titanium dioxide 7%, lithium carbonate 13% , 4.2% of boron oxide, 8.5% of quartz sand, 4.5% of carbonaceous materials (graphite and carbon black).

[0055] These raw materials are proportioned according to the requirements of chemical composition, ground into fine powder and unifo...

Embodiment 2

[0057] Example 2 Continuous casting with high titanium oxide mold slag for titanium-containing steel of the present invention

[0058] The specific operation method is as follows:

[0059] For the production of steel containing 0.8% titanium, the main components of the mold slag are: by weight percentage, CaO 26%, MgO 2.0%, SrO 3%, SiO 2 9%, Al 2 O 3 18.3%, CaF 2 5.1%, BaF 2 5%, Li 2 O 5%, B 2 O 3 2%, C 5%; TiO 2 19.5%. The physical properties are: melting point 990℃, viscosity 0.142Pa·S at 1300℃.

[0060] The raw materials for the preparation of mold slag for continuous casting of titanium-containing steel include: limestone 36%, bauxite 17.6%, magnesium carbonate 2.4%, strontium carbonate 3.4%, barium fluoride 2.3%, calcium fluoride 2.5% by weight %, titanium dioxide 14.6%, lithium carbonate 10%, boron oxide 2.4%, quartz sand 6.4%, carbonaceous material 3.8% (graphite and carbon black).

[0061] These raw materials are proportioned according to the requireme...

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Abstract

The invention belongs to the technical field of metallurgy, and in particular relates to a high-oxidized titanium continuous casting mold flux for titanium-containing steel. Aiming at the problems that the existing continuous casting mold slag is prone to reaction in the production of high-titanium steel, resulting in denaturation of the mold slag and affecting the smooth flow of continuous casting production, the present invention provides a high-oxide titanium mold slag for titanium-containing steel. The chemical composition includes: In terms of weight percentage, (CaO+BaO+MgO+SrO)31~45%, SiO 2 9~13%, Al 2 o 3 18~26%, (NaF+CaF 2 +BaF 2 )10~16%, Li 2 O 5~10%, B 2 o 3 2~4%, C 5~10%, TiO 2 10-20%. The balance is unavoidable impurities. The invention also provides a combination of raw materials and a preparation method for preparing high titanium oxide mold flux for titanium-containing steel. TiO in continuous casting mold flux of the present invention 2 Saturation, low reactivity, can significantly reduce the deterioration of mold slag, ensure the continuous casting process of steel, cast titanium-containing steel slabs with excellent surface quality, increase the number of continuous casting furnaces, so that the number of continuous casting furnaces can reach more than 3 furnaces , It is of great significance to improve production efficiency and save costs.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a continuous casting mold flux containing high titanium oxide for titanium-containing steel. Background technique [0002] In the continuous casting process, the main functions of mold flux include: (1) lubricate between the slab and the mold wall; (2) control and improve the heat transfer between the slab and the mold; (3) prevent Secondary oxidation of molten steel; (4) Adiabatic insulation to reduce heat loss of molten steel; (5) Absorption and dissolution of non-metallic inclusions in molten steel. Among them, lubrication and heat transfer are the most critical, which directly affect breakout. [0003] Due to the precipitation of TiC, titanium-containing steel has the characteristics of high strength, high toughness, high wear resistance, etc., and has a wide range of application prospects. However, the continuous casting production of titanium-containing ste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 曾建华谢鑫王谦黎建全
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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