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Medium-frequency induction furnace molten steel dephosphorization

An induction furnace and molten steel technology, applied in the field of dephosphorization of medium frequency induction furnace molten steel, can solve the problems of acid furnace lining damage, short service life of furnace lining, high price of alkaline furnace lining, etc., and achieve the effect of improving dephosphorization efficiency

Inactive Publication Date: 2016-01-20
FUJIAN XINGHANG MECHANICAL CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are two types of intermediate frequency induction furnace linings: acidic and alkaline, but the price of alkaline lining is relatively high, and the service life of the lining is relatively short. Therefore, the use of alkaline lining will lead to an increase in production costs. In order to reduce production costs, acidic lining is generally used; During the steel process, impurity elements such as P and S in molten steel need to be removed to a certain allowable range. If P removal and other operations are carried out in the intermediate frequency induction furnace, it needs to be carried out under alkaline steam, which will cause damage to the acid furnace lining and accelerate Reduce the service life of the furnace lining, therefore, an economical and rapid dephosphorization steelmaking method is needed to reduce production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: A method for dephosphorizing molten steel in an intermediate frequency induction furnace, carried out according to the following steps:

[0015] (1) Put the steel material into the intermediate frequency induction furnace for smelting, and pre-set the dephosphorization agent in the ladle;

[0016] (2) Pour the smelted molten steel into the ladle, and then guide the dephosphorized molten steel back into the intermediate frequency induction furnace to continue smelting and heat preservation;

[0017] (3) Continue to put dephosphorization agent into the ladle, and then pour the molten steel in the intermediate frequency induction furnace into the ladle to dephosphorize again;

[0018] (4) Steps (2) and (3) are repeated until the phosphorus content in the molten steel reaches the preset target.

[0019] In this embodiment, the temperature of the molten steel in the intermediate frequency induction furnace is 1540°C.

[0020] In this embodiment, the quality o...

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Abstract

The invention relates to a medium-frequency induction furnace molten steel dephosphorization method which comprises the following steps: putting steel in a medium-frequency induction furnace for smelting, and pre-putting a dephosphorization agent in a steel ladle; pouring smelted molten steel in the steel ladle, and directing dephosphorized molten steel in the steel ladle back to the medium-frequency induction furnace for continuous smelting and heat preservation; continuously putting the dephosphorization agent in the steel ladle, and pouring the molten steel in the medium-frequency induction furnace in the steel ladle for secondary dephosphorization; repeating the steps until phosphorus content of the molten steel reaching the preset target. The temperature in the medium-frequency induction furnace is 1540 DEG C. The medium-frequency induction furnace molten steel dephosphorization is simple and practical and can improve the dephosphorization efficiency on the premise of effectively protecting the lining of the medium-frequency induction furnace.

Description

technical field [0001] The invention relates to a method for dephosphorizing molten steel in an intermediate frequency induction furnace. Background technique [0002] There are two types of intermediate frequency induction furnace linings: acidic and alkaline, but the price of alkaline lining is relatively high, and the service life of the lining is relatively short. Therefore, the use of alkaline lining will lead to an increase in production costs. In order to reduce production costs, acidic lining is generally used; During the steel process, impurity elements such as P and S in molten steel need to be removed to a certain allowable range. If P removal and other operations are carried out in the intermediate frequency induction furnace, it needs to be carried out under alkaline steam, which will cause damage to the acid furnace lining and accelerate Reduce the service life of the furnace lining, therefore, an economical and rapid dephosphorization steelmaking method is nee...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064
Inventor 郑建斌贾超陈忠振陈忠霆陈忠旺陈常旺
Owner FUJIAN XINGHANG MECHANICAL CASTING