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Preparation method of fluoride-free low-titanium molten steel cleaning agent (refining material)

A purification agent and molten steel technology, applied in the field of deep processing of non-metallic materials, can solve the problems of unsuitable refined materials, harmful fluorite fluorine, high titanium content, etc., to achieve the effect of ensuring quality and performance, avoiding pollution, and promoting desulfurization

Inactive Publication Date: 2017-10-13
大连环球矿产股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the refined materials used in the market are made of industrial minerals and fluorite by melting and firing. However, fluorine in fluorite is a harmful indicator, which seriously pollutes the environment during the production process. Refined materials containing fluorine are widely used in Japan. Countries such as South Korea have been strictly prohibited from using it; and the titanium content in the refined material is too high, which makes the refined material not suitable for use as a TiO 2 Smelting of demanding special steel, low carbon steel and ultra-low carbon steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of a fluorine-free low-titanium molten steel purifier (refined material), the preparation method is: by weight percentage, 100% natural wollastonite is added into the cupola as a raw material, and the weight ratio of the raw material to coke is 1 : 0.38, with the continuous melting of materials, quantitatively add raw materials and coke, keep the thickness of raw materials and coke layer constant, at the same time, keep the temperature of the melting layer in the cupola at 1300-1500 ° C, the molten materials flowing out of the cupola are quenched by water, Drying, sieving, and pulverizing to obtain a fluorine-free low-titanium molten steel purifier (refined material);

[0034] Detect the composition of the above-mentioned fluorine-free low-titanium molten steel purifier (refined material): SiO 2 : 50.65%, CaO: 44.62%, F: 0%, TiO 2 : 0.05%, with SiO 2 : 49-55%, CaO: 43-49%, F≤0.02%, TiO 2 ≤0.08% design standard;

[0035] The above-mentioned fluor...

Embodiment 2

[0037] A preparation method of a fluorine-free low-titanium molten steel purifier (refined material), the preparation method is: by weight percentage, after mixing 80% natural wollastonite and 20% quartz, they are added into the cupola as raw materials, and the raw materials The weight ratio to coke is 1:0.38. With the continuous melting of the material, the raw material and coke are added quantitatively to keep the thickness of the raw material and coke layer constant. The molten material is water-quenched, dried, sieved, and crushed to obtain a fluorine-free low-titanium molten steel purifier (refined material);

[0038] Detect the composition of the above-mentioned fluorine-free low-titanium molten steel purifier (refined material): SiO 2 : 60.09%, CaO: 36.78%, F: 0%, TiO 2 : 0.05%, with SiO 2 : 58-64%, CaO: 34-39%, F≤0.02%, TiO 2 ≤0.08% design standard;

[0039] The above-mentioned fluorine-free low-titanium molten steel purifier (refined material) is suitable for the ...

Embodiment 3

[0041] A preparation method of a fluorine-free low-titanium molten steel purifier (refined material), the preparation method is: by weight percentage, after mixing 92% natural wollastonite and 8% limestone as raw materials, they are added to the cupola, and the raw materials The weight ratio to coke is 1:0.38. With the continuous melting of the material, the raw material and coke are added quantitatively to keep the thickness of the raw material and coke layer constant. The molten material is water-quenched, dried, sieved, and crushed to obtain a fluorine-free low-titanium molten steel purifier (refined material);

[0042] Detect the composition of the above-mentioned fluorine-free low-titanium molten steel purifier (refined material): SiO 2 : 49.26%, CaO: 47.54%, F: 0%, TiO 2 : 0.04%, with SiO 2 : 41-50%, CaO: 40-47%, F≤0.02%, TiO 2 ≤0.08% design standard;

[0043] The above-mentioned fluorine-free low-titanium molten steel purifier (refined material) is suitable for the ...

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Abstract

The invention relates to a preparation method of a fluorine-free low-titanium molten steel purifying agent (refined material), and belongs to the technical field of deep processing of non-metallic materials. The preparation method is as follows: melting at least one of natural wollastonite, quartz and calcium carbonate as a raw material to obtain a fluorine-free low-titanium molten steel purifier (refined material). The fluorine-free low-titanium molten steel purifier (refined material) prepared by the present invention can be directly used for impurity removal, refining and cleaning molten steel during steel smelting; the fluorine-free low-titanium molten steel purifier (refined material) forms slag quickly and It absorbs impurities in molten steel, increases the fluidity of molten steel, and at the same time, removes non-metallic inclusions in molten steel, effectively deoxidizes, and promotes desulfurization. It is an ideal molten steel refining material for smelting special steel and pure steel.

Description

technical field [0001] The invention relates to a preparation method of a fluorine-free low-titanium molten steel purifying agent (refined material), and belongs to the technical field of deep processing of non-metallic materials. Background technique [0002] Wollastonite belongs to natural silicate minerals, chemical composition SiO 2 CaO, of which SiO 2 The theoretical content is 51.75%, and the theoretical content of CaO is 48.25%. At the same time, after high-temperature melting of calcium carbonate minerals, the main chemical composition is CaO, and the main chemical composition of quartz is SiO. 2 , the chemical composition of the two mineral raw materials is basically the same as that of wollastonite, both of which are SiO 2 • CaO, with the same chemical properties. [0003] Because natural wollastonite has stable chemical properties and suitable alkalinity, it is used as the main raw material for the production of refined materials and is widely used in metallur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06C21C7/064
CPCC21C7/06C21C7/0645
Inventor 姜山张梦显
Owner 大连环球矿产股份有限公司
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