Production method of ultra-low silicon peritectic steel

A production method and silicon package technology, applied in the direction of manufacturing converters, etc., can solve problems such as universality to be tested and so on

Inactive Publication Date: 2017-06-13
TANGSHAN IRON & STEEL GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology allows producing low-silicone steels by continuously cast in converters without adding excessive amounts of aluminum or fluoride material during processing. Additionally, this method can modify the properties of molten metals used in making these types of alloys while maintaining their purity levels within certain limits. These modifications help prevent defects such as cracks from forming on the resulting product's surfaces when exposed to harsh environments like water vapor. Overall, this new approach improves the performance and yield of cold rolled thin film magnetic cores made up mostly of amorphous carbon (a type called graphene).

Problems solved by technology

The technical problem addressed in this patented text relates to improving the performance of producing ultrasonic castings made up mostly of pure Fe without containing too much silica while maintaining desired levels of carbon content. Current solutions involve adding specific elements like calcium or magnesium instead of silicate to achieve these goals. These approaches result in increased costs associated with manufacture processes and lacked flexibility in terms of selecting appropriate materials based upon different targets.

Method used

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  • Production method of ultra-low silicon peritectic steel

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Effect test

Embodiment 1

[0043] The production process of ultra-low silicon peritectic steel is: hot metal desulfurization→converter smelting→RH treatment→slab continuous casting.

[0044] Converter 100t in the embodiment, RH refining 100t, slab continuous casting slab width is 800mm, and thickness is 200mm, and concrete operation steps and each procedure process parameter control are as follows:

[0045] 1. Desulfurization of molten iron: After spraying magnesium powder and lime on the ladle for desulfurization, use a slag remover to remove the slag until there is no slag on the surface of the molten iron, and enter the molten iron [S]=0.003%.

[0046] 2. Converter smelting

[0047] 1) The flue gas analysis is combined with the static model for smelting, the blowing process controls the end point temperature to 1710°C, and the end point oxygen level = 450ppm.

[0048] 2) Use the slag blocking method of combining the front slag blocking plate, the rear slag blocking cone and the sliding plate to stri...

Embodiment 2

[0067] The production process of ultra-low silicon peritectic steel is: hot metal desulfurization→converter smelting→RH treatment→slab continuous casting.

[0068] Converter 100t in the embodiment, RH refining 100t, slab continuous casting slab width is 960mm, and thickness is 200mm, and concrete operation steps and each procedure process parameter control are as follows:

[0069] 1. Desulfurization of molten iron: After spraying magnesium powder and lime on the ladle for desulfurization, use a slag scooper to remove the slag until there is no slag on the surface of the molten iron, and enter the molten iron [S]=0.0025%.

[0070] 2. Converter smelting

[0071] 1) The flue gas analysis is combined with the static model for smelting, the blowing process controls the end point temperature to 1725°C, and the end point oxygen level = 700ppm.

[0072] 2) Use the slag blocking method of combining the front sliding plate, the rear slag blocking cone and the sliding plate to strictly ...

Embodiment 3

[0090] The production process of ultra-low silicon peritectic steel is: hot metal desulfurization→converter smelting→RH treatment→slab continuous casting.

[0091] Converter 100t in the embodiment, RH refining 100t, slab continuous casting slab width is 1550mm, and thickness is 200mm, and concrete operation steps and each procedure process parameter control are as follows:

[0092] 1. Desulfurization of hot metal: After spraying magnesium powder and lime on the ladle for desulfurization, use a slag catcher to remove the slag until there is no slag on the surface of the molten iron, and enter the molten iron [S]=0.0016%.

[0093] 2. Converter smelting

[0094] 1) The flue gas analysis is combined with the static model for smelting, the blowing process controls the end point temperature to 1740°C, and the end point oxygen level = 800ppm.

[0095] 2) Use the slag blocking method of combining the front slag blocking plate, the rear slag blocking cone and the sliding plate to stri...

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Abstract

The invention relates to a steelmaking production method of ultra-low silicon peritectic steel, and belongs to the technical field of iron and steel smelting. The production method comprises the working procedures of molten iron desulphurization, converter smelting, RH treatment and slab continuous casting; in the mass percent of the peritectic steel composition of the finished product, Si content is not more than 0.010%, C content is equal to 0.08-0.10%. In the invention, the production technology procedures of molten iron desulphurization, converter smelting, RH treatment and slab continuous casting are adopted, and high-quality ultra-low silicon peritectic steel of which the Si content is not more than 0.010% is produced; the technical problems that the Si content is easy to be out of limits, the inclusion control capability is insufficient, and the continuous casting slab quality is poor in the existing production technology are solved.

Description

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Claims

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Application Information

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Owner TANGSHAN IRON & STEEL GROUP
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