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A smelting method for dephosphorizing and carbonizing molten iron with low temperature and low silicon

A smelting method and molten iron technology, applied in the direction of manufacturing converters, etc., can solve the problem of difficulty in smelting, and achieve the effect of improving the dephosphorization efficiency of converters

Active Publication Date: 2021-04-13
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to solve the problem of difficulty in smelting low-temperature and low-silicon molten iron in the prior art, and to provide a smelting method for dephosphorizing and carbon-pulling low-temperature and low-silicon molten iron. , the method of adding amount of sludge balls, and the appropriate oxygen lance operation system, so as to effectively smelt low-temperature molten iron, and smelt molten steel with qualified temperature and components.

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  • A smelting method for dephosphorizing and carbonizing molten iron with low temperature and low silicon
  • A smelting method for dephosphorizing and carbonizing molten iron with low temperature and low silicon
  • A smelting method for dephosphorizing and carbonizing molten iron with low temperature and low silicon

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Embodiment Construction

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all Embodiments; moreover, each embodiment is not relatively independent, and can be combined with each other according to needs, so as to achieve better effects. Accordingly, the following detailed description of the embodiments of the invention is not intended to limit the scope of the invention as claimed, but is merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts all belong to the protection scope of the present invention.

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Abstract

The invention discloses a smelting method for dephosphorizing and carbonizing molten iron with low temperature and low silicon, and belongs to the technical field of steelmaking. The present invention first detects the composition of molten iron, and according to the content of [Si] in molten iron, adds additives to molten iron, and described additive includes lime and sludge ball; Additive amount is M, and M is quantitatively adjusted based on molten iron composition The method of adding lime and sludge pellets in the dephosphorization process of the converter, combined with the appropriate operating system of the oxygen lance, can make the dephosphorization slag early and good, and improve the dephosphorization efficiency of the converter.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, more specifically, to a smelting method for dephosphorizing and carbonizing molten iron at low temperature and low silicon. Background technique [0002] With the continuous development of the times, people's requirements for high-quality pure steel are also increasing. How to produce high-quality steel efficiently, quickly and stably is a common concern of metallurgists. Phosphorus, as a harmful element in most steel types, will have a great impact on the quality of steel. The converter uses molten iron and steel scrap as raw materials, lime, light-burned dolomite and other raw and auxiliary materials as slagging agents, and oxygen is blown into the furnace for smelting. The main purpose of converter smelting is to dephosphorize, decarburize and heat up. The dephosphorization reaction in the converter process can be expressed by formula (1). This reaction is an exothermic rea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C5/28
CPCC21C5/28
Inventor 亓伟伟常立忠孙建卫王海军李松周俐魏义胜何飞刘洪银赵圣功郝帅
Owner SHANDONG IRON & STEEL CO LTD
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