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Method for producing high-quality steel through abandoned cast steel bricks

A high-quality, steel brick technology, applied in the manufacture of converters, etc., can solve the problems of long production cycle, non-circulation, high cost, etc., and achieve the effect of long production cycle, low oxidation and high raw material cost

Inactive Publication Date: 2020-09-04
MINMETALS YINGKOU MEDIUM PLATE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention discloses a method for producing high-quality steel by using discarded poured steel bricks, which solves the disadvantages of high cost, high power consumption, long production cycle and non-circulation existing in the existing methods in the industry

Method used

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  • Method for producing high-quality steel through abandoned cast steel bricks
  • Method for producing high-quality steel through abandoned cast steel bricks

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0040] Taking the production of spring steel 55SiCrV as an example, it is produced in a converter (or electric furnace).

[0041] Converter tapping composition: [C]≥0.06%, [P]≤0.012%; tapping temperature: 1630~1670°C; red-packet slag-free tapping;

[0042] Materials added during tapping: recarburizer, ferrosilicon manganese (or ferrosilicon, ferromanganese), other alloys, lime;

[0043] Temperature measurement, sampling.

[0044] LF furnace:

[0045] After the ladle arrives at the station, power is sent, and silicon and carbon deoxidizers are used for deoxidation. According to the analysis results after the converter, add to the specified range. After the temperature is ≥ 1520 ° C and the slag is white, power off and lift the electrode, and take component samples and slag samples for analysis. .

[0046] After the composition results come out, adjust the molten steel composition;

[0047] After the results of the slag sample come out, the composition of the refining slag i...

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Abstract

The invention discloses a method for producing high-quality steel through abandoned cast steel bricks. The method includes the following steps that firstly, converter high-carbon-catch tapping is conducted; secondly, in the tapping process, a siliceous deoxidizing agent, lime slag charge and alloys are added; thirdly, LF furnace refining is conducted; fourthly, white slag post component and refining slag analysis is conducted; fifthly, according to refining slag components, furnace slag components are adjusted to a CaO-SiO2-Al2O3 ternary phase diagram area A through the abandoned cast steel bricks; sixthly, component adjustment and soft blowing are conducted, components are adjusted to regulated values according to steel sample components, and according to the refining slag components, theslag components are adjusted to the CaO-SiO2-Al2O3 ternary phase diagram area A through the abandoned cast steel bricks; seventhly, argon blowing processing is conducted, the vacuum degree is smallerthan or equal to 100 Pa, and the vacuum keeping time is not shorter than 15 min; and eighthly, continuous casting is conducted. The method effectively overcomes the defects that an existing method inthe current industry is high in cost, high in electricity consumption, long in production period and not capable of achieving circulation.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgical production, and relates to a method for producing high-quality steel by using discarded poured steel bricks. Background technique [0002] High-quality steel, such as bearing steel, spring steel, cord steel, pipeline steel, etc., has extremely strict requirements on inclusions, requiring low impurity content and few harmless inclusions. For example, spring steel plays a very important role in mechanical applications, and has various functions such as buffering, shock absorption, support, and force transmission in various instruments and meters. Long-term work under alternating, impact, and abrupt loads is prone to fatigue damage. It must have high strength, long fatigue life and superior shock absorption performance. The inclusions that cause fatigue cracks are: Al 2 o 3 • MgO, CaO • SiO 2 •Al 2 o 3 • MgO, TiN, Al 2 o 3 • CaO, CaO • SiO 2 •Al 2 o 3 、Al 2 o 3 Wait...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06C21C7/00C21C5/28
CPCC21C5/28C21C7/0006C21C7/0025C21C7/06
Inventor 淦家余杨海峰李廷刚马仲群曲之国孙建鹏靳博承任越峰李永金赵兴通
Owner MINMETALS YINGKOU MEDIUM PLATE
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