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Deoxygenating reinforcer

A strengthening agent and weight technology, applied in the field of deoxidation enhancer, can solve the problems of inclusions in steel, deoxidation elements can not dissolve oxygen reaction, etc., to achieve the effect of improving fluidity, reducing total oxygen content, and enhancing deoxidation ability

Inactive Publication Date: 2007-03-14
NINGBO HELANSHAN METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This deoxidation method has certain disadvantages: 1) All the deoxidizing elements added cannot react with the dissolved oxygen in the steel; 2) Except for carbon, the products formed by all other deoxidizing elements are solid at the steelmaking temperature Or liquid oxides, and these oxides cannot be completely removed from the steel, and the remaining ones form inclusions in the steel
Although these processes have a certain deoxidation effect, they are not satisfactory in general.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0013] Lime containing 91% CaO, 98% SiO 2 Quartz stone and 90% CaF 2 The fluorite is batched according to the composition of the deoxidation enhancer of the present invention. The prepared ingredients are melted in an induction furnace. After the molten material is cooled, it is crushed, and the particles of 5-20 mm are selected. After analysis, the composition of the above-mentioned melting-solidification product is: CaO43%, SiO 2 41%, CaF 2 8% and 8% impurities.

[0014] Pipeline steel is smelted in a converter. The total oxygen content of the final deoxidized molten steel before tapping is 62ppm. Add the above particles into the ladle with the steel flow at an amount of 1 kg / ton of molten steel during the tapping process, and finish adding when the molten steel reaches 2 / 3. After tapping, the total oxygen content in molten steel was measured to be 48ppm. After analyzing Al in steel 2 o 3 Inclusions are significantly reduced.

[0015] The deoxidation enhancer of t...

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Abstract

The present invention provides one kind of deoxygenating reinforcer comprising certain amount of CaO42-47 wt%, SiO2 40-42 wt% and CaF2 5-10 wt%. The deoxygenating reinforcer is the smelted and solidified product of the contained components. It is added into molten steel after final deoxygenation in the amount of 1.5 Kg / ton steel to further lower the oxygen and inclusion content.

Description

technical field [0001] The invention relates to a deoxidation enhancer for deoxidation of molten steel. Background technique [0002] The last process of oxidation steelmaking is to deoxidize the molten steel. In a broad sense, it is necessary to remove the oxygen dissolved in the molten steel and to remove various oxides present in the steel. The traditional deoxidation method is to add elements with stronger oxygen affinity than iron-oxygen affinity to molten steel to deoxidize molten steel. This deoxidation method has certain disadvantages: 1) All the deoxidizing elements added cannot react with the dissolved oxygen in the steel; 2) Except for carbon, the products formed by all other deoxidizing elements are solid at the steelmaking temperature Or liquid oxides, and these oxides cannot be completely removed from the steel, and the remaining ones form inclusions in the steel. In response to the shortcomings of the above deoxidation methods, the metallurgical industry has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/06
Inventor 于跃华
Owner NINGBO HELANSHAN METALLURGY
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