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Semi-steel steelmaking slag former

A steelmaking slagging agent and slagging agent technology, applied in the manufacture of converters, etc., can solve the problems of not being able to effectively improve the slagging efficiency, affect the slagging, and dephosphorization effects, and achieve accelerated slagging and dephosphorization reactions, Effects of shortening converter blowing time and lowering viscosity

Active Publication Date: 2022-07-01
芜湖县天海耐火炉料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the use of such slagging agents cannot effectively improve the slagging efficiency and affect the slagging and dephosphorization effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation aids:

[0024] The converter dust and sludge are broken into particles with a particle size of 5-10mm, and then CaO is added. After mixing uniformly, the temperature is raised to 550 ° C under nitrogen protection, and carbon dioxide is introduced, and the reaction is carried out for 2 hours to obtain additives; the amount of CaO added It is 20% of the mass of converter dust and sludge; in the process of feeding carbon dioxide, the feeding flow is 300mL / min.

Embodiment 2

[0026] Preparation aids:

[0027] The converter dust and sludge are broken into particles with a particle size of 5-10mm, and then CaO is added. After mixing evenly, the temperature is raised to 600 ° C under nitrogen protection, and carbon dioxide is introduced, and the reaction is carried out for 3 hours to obtain additives; the amount of CaO added It is 25% of the mass of converter dust and sludge; in the process of feeding carbon dioxide, the feeding flow rate is 300mL / min.

Embodiment 3

[0029] Preparation of slag making agent:

[0030] After mixing 75 parts of lime, 15 parts of magnesium oxide, 0.8 part of a binder, 2 parts of hydrocarbon particles, and 6 parts of the auxiliary agent prepared in Example 1, it was milled and pressed to form a slag-forming agent.

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Abstract

The invention discloses a semi-steel steelmaking slag former, which belongs to the technical field of metallurgical engineering, and comprises the following raw materials by weight: 75-85 parts of lime, 15-20 parts of magnesium oxide, 0.8-1 part of a binder, 2-3 parts of hydrocarbon particles, and 6-8 parts of an auxiliary agent. And the hydrocarbon particles, magnesium oxide, lime, an auxiliary agent and a binding agent are evenly mixed and then ground and subjected to compression molding, and the slag former is obtained. The hydrocarbon particles and the auxiliaries are added and have a synergistic effect, generation of FeO is promoted, dissolution of CaO is promoted, slagging and dephosphorization reactions can be accelerated, the converter blowing time is effectively shortened, and the overall converter steelmaking efficiency is improved; in addition, no other impurities are introduced into the molten steel, and the quality of steel finished products is improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical engineering, and in particular relates to a slag-forming agent for semi-steel steelmaking. Background technique [0002] For most steel grades, P is a harmful element, which will reduce the strength and mechanical properties of the steel, affect the use effect, and cause serious safety accidents. Therefore, the requirements for the content of P in the steel are more and more strict, and the end point is generally required [ P%]≤0.012%. However, at present, semi-steel smelting is used in converter steelmaking, and the average end point [P%] is 0.158%. Because the silicon element in the semi-steel is almost completely oxidized and the manganese element content is also very small, it is difficult to form slag at the initial stage of smelting, and the dephosphorization efficiency is reduced. [0003] At present, in the smelting process of producing certain steel grades, high alumina bauxite (cl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C5/36C21C7/064
CPCC21C5/36C21C7/0645Y02P10/20
Inventor 吴大宏童振兰
Owner 芜湖县天海耐火炉料有限公司
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