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High manganese and high aluminous steel covering slag containing ferric oxide and application thereof

A technology of ferric oxide and mold slag, which is applied in the field of iron and steel smelting and continuous casting, can solve the problems of deterioration of lubrication and control of heat transfer, achieve good physical and chemical properties, inhibit slag-steel reaction, and ensure smooth progress

Active Publication Date: 2017-12-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mold flux can effectively inhibit the slag-steel reaction and reduce the probability of slag entrainment, but the mold flux is added flux (Na 2 O. Li 2 O, F - ) content is too small, which will lead to high melting point of mold slag, thin slag layer of mold slag on molten steel surface, liquid slag cannot smoothly flow into the gap between billet and mold wall, thus deteriorating lubrication and important functions such as controlling heat transfer

Method used

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  • High manganese and high aluminous steel covering slag containing ferric oxide and application thereof
  • High manganese and high aluminous steel covering slag containing ferric oxide and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Ingredients: CaO 27.92%, Al 2 o 3 24.78%, SiO 2 11.6%, Na 2 O 9.2%, Li 2 O 3.6%, MnO 3.2%, BaO 6.8%, F ‐ 9.6%, Fe 2 o 3 3.3%, (CaO+BaO) / Al 2 o 3 1.405, Fe 2 o 3 / SiO 2 is 0.284.

[0037] Preparation process: Weigh the above-mentioned mold slag raw materials according to the target components, and perform mechanical stirring to make the components evenly mixed, and then use an intermediate frequency induction furnace to heat and melt the mixed samples to remove volatiles and gas substances, and form complex Solid solution, the molten slag is poured into water and quenched to obtain a glassy mold slag block, and the mold slag block is mechanically crushed and ground to obtain the required mold slag powder.

[0038] The main physical properties of mold flux are shown in Table 1.

Embodiment 2

[0040] Ingredients: CaO 27.13%, Al 2 o 3 24.06%, SiO 2 11.81%, Na 2 O 9.1%, Li 2 O 3.9%, MnO 3.3%, BaO 6.7%, F ‐ 9.3%, Fe 2 o 3 4.7%, (CaO+BaO) / Al 2 o 3 1.406, Fe 2 o 3 / SiO 2 is 0.398.

[0041] Preparation process: with embodiment 1.

[0042] The main physical properties of mold flux are shown in Table 1.

Embodiment 3

[0044] Ingredients: CaO 26.58%, Al 2 o 3 23.7%, SiO 2 11.22%, Na 2 O 9.2%, Li 2 O 3.7%, MnO 3.9%, BaO 6.6%, F ‐ 9.2%, Fe 2 o 3 5.9%, (CaO+BaO) / Al 2 o 3 1.400, Fe 2 o 3 / SiO 2 is 0.526.

[0045] Preparation process: with embodiment 1.

[0046] The main physical properties of mold flux are shown in Table 1.

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Abstract

The invention discloses high manganese and high aluminous steel continuous casting covering slag containing ferric oxide and application thereof. The covering slag comprises, by mass, 22%-32% of CaO, 19%-29% of Al2O3, 10%-16% of SiO2, 2%-8% of MnO, 6%-12% of Na2O, 2%-6% of Li2O, 4%-12% of BaO, 7%-13% of F, 2%-10% of Fe2O3, 1.3%-2.3% of (CaO+BaO) / Al2O3 and 0.2%-0.9% of Fe2O3 / SiO2. By adding a proper amount of the Fe2O3 in a controlled mode, the covering slag with the low viscosity and good crystallization property is obtained. The covering slag is applied to the high manganese and high aluminous steel slab continuous casting production process, the slag-steel reaction happening in the continuous casting process can be effectively restrained, the crystallization property and lubricating property of the covering slag in the continuous casting process are changed to be more stable, the effect that the high manganese and high aluminous steel continuous casting process can be executed smoothly is guaranteed, and the surface quality of a poured high manganese and high aluminous steel casting blank is excellent.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting and continuous casting, and relates to mold mold slag for continuous casting of high manganese and high aluminum steel with good physical and chemical properties and low slag-steel reaction degree. Background technique [0002] With the development of the automobile industry and the energy industry, Al is added to steel as an alloy element, and steels with high aluminum content have become research hotspots, such as TRIP steel and TWIP steel, which are a new generation of advanced high-strength steel and are widely used in the automobile industry; Due to the active chemical properties of Al at high temperatures, Al in high-alumina molten steel will interact with SiO in mold flux 2 and other reducing substances undergo redox reactions, SiO 2 A large amount of consumption will cause the basicity of mold flux (CaO / SiO 2 ) rises sharply, while Al in mold flux 2 o 3 content significantly incr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 王万林黄道远高尔卓周乐君龙旭凯李欢张磊
Owner CENT SOUTH UNIV
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