Hot rolled steel converter slag washing and direct feeding continuous casting production process

A production process and converter slag technology, applied in the field of metallurgy, can solve problems such as production requirements that do not meet energy-saving and high-efficiency, large electric power, consumption and so on

Pending Publication Date: 2022-04-12
扬州恒润海洋重工有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the refining process, it is necessary to use refining electrodes to heat and slag to improve the purity of molten steel and meet the requirements of steel types. The power consumption is ab

Method used

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Embodiment Construction

[0030] A hot-rolled steel converter slag washing straight up continuous casting production process, comprising the following steps:

[0031] S1, the converter is mixed with molten iron, and the composition and temperature of molten steel before tapping are adjusted;

[0032] S2. Carry out alloying, deoxidation and slagging of molten steel during the tapping process;

[0033] S3, carrying out slag washing on the ladle top slag;

[0034] S4, carry out heavy calcium treatment to molten steel;

[0035] S5. Upward continuous casting of molten steel for pouring.

[0036] The present invention advances the slag-making process. During the tapping process, the bottom slag is refined by means of the impact of molten steel; after soft blowing in the argon station, the slag washing material is formed by using aluminum chips and white ash in a reasonable combination, and the bottom slag is cleaned. Slag washing process, so as to achieve the purpose of refining. It is no longer necessar...

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Abstract

The invention relates to a hot rolled steel converter slag washing direct feeding continuous casting production process. Relates to the technical field of metallurgy, in particular to a smelting method of hot rolled steel. According to the molten steel deoxidizer, a silicon-aluminum mixture is changed into pure aluminum, so that a deoxidation product is converted into an Al2O3 concentrated product from a silicon-aluminum composite oxidation product. The removal of Al2O3 concentrated products mainly comprises two modes: 1, physical slag removal of early-stage slag making; 2, a calcium line is added before molten steel pouring, so that an Al2O3 concentrated product is combined with Ca, and a 7Al2O3 * 12CaO compound is generated; the steel ladle slag is alkaline reducing white slag, can adsorb inclusions in molten steel, and can also ensure that the molten steel is not subjected to secondary oxidation. The refining procedure in the original production mode is compressed to the converter argon station to be completed, and the purposes of saving energy consumption and production cost of the refining procedure, improving production efficiency and the like are achieved.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a method for smelting hot-rolled steel. Background technique [0002] Hot-rolled billets mainly include: low-carbon 235, national standard 235, 195 series, SPHC (cold-rolled billet), etc.; because the thickness of the hot-rolled billet rolled slab is between 1.5-9.0mm, the elongation performance and cold-bending performance requirements of the steel Relatively high; when producing this type of steel, each manufacturer will appropriately increase the content of Als (acid-melted aluminum) according to the national standard requirements, the general requirement is between (0.015%-0.045%), in order to optimize the performance of the steel and meet customer needs . Among them, the addition of Als has become a key technology in the entire smelting process. The original manufacturers have adopted the addition of LF refining process, which has achieved the control of Als in molten st...

Claims

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Application Information

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IPC IPC(8): C22C33/06C21C7/06C21C7/00C21C5/28
Inventor 赵旭东郭子彦野少章
Owner 扬州恒润海洋重工有限公司
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