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Method for removing titanium from ladle by using stirring method

A technology of ladle and stirring method is applied in the field of titanium removal from molten iron, which can solve the problems of large fluctuation of titanium content, increase in production cost, and decline in steel quality, and achieve the effect of solving the difficulty of removing titanium, improving production efficiency and improving the quality of molten steel.

Active Publication Date: 2010-08-18
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The problem is that it is affected by the smelting temperature and molten steel oxidation, the titanium removal is difficult and the effect is unstable, and the titanium content in the steel fluctuates greatly, which leads to a decline in the quality of the steel and an increase in production costs.

Method used

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  • Method for removing titanium from ladle by using stirring method
  • Method for removing titanium from ladle by using stirring method
  • Method for removing titanium from ladle by using stirring method

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] Processing step of the present invention is:

[0017] (1) Stir the molten iron with an agitator to provide dynamic conditions for the chemical reaction of titanium removal; the depth of the agitator inserted into the molten iron tank or ladle is: the distance between the bottom of the agitator and the bottom of the molten iron tank or ladle is 200-400mm The rotational speed of the agitator is 10-140 rpm; the agitator is composed of a rotating motor, an agitating shaft, an agitating paddle, and a connecting flange, etc., the agitating head is in the shape of a four-piece cross, and the agitating shaft has a circular cavity. Internal air cooling;

[0018] (2) The titanium removal agent is conveyed by pneumatic force, with nitrogen as the carrier gas, and transported to the ladle through storage tanks, blowing tanks, and pipelines. The pressure of ...

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Abstract

The invention discloses a method for removing titanium from ladle by using a stirring method and belongs to the technical field of molten iron titanium removal. The method comprises the process step of stirring molten iron by using a stirring paddle for providing a dynamical condition for a titanium-removing chemical reaction. The depth of the stirring paddle inserted into the ladle is that the distance from the bottom of a stirrer to the bottom of a molten iron tank or the bottom of a molten iron ladle is 200-400mm and the rotating speed of the stirring paddle is 10-140r / min; a titanium removing agent is pneumatically delivered to the inside of the molten iron ladle through a storage tank, a spraying tank and a pipeline by taking nitrogen gas as carrier gas; and the weight ratio of the titanium removing agent to the nitrogen gas is 3-10:1. The addition of the titanium removing agent is 5-50kg / t; the temperature reduction of the molten iron is less than or equal to 40DEG C; and after the titanium removing is finished, titanium removing slag is raked by a slag-raking machine. The invention has the advantages that the titanium removing effect is good, the titanium content in the molten iron is reduced to be less than or equal to 0.015 percent from 0.14 percent, the temperature reduction is less than or equal to 40DEG C and the titanium removing agent has low consumption which is 5-50kg of molten iron; and the invention is particularly applicable for producing high-quality steel grades.

Description

technical field [0001] The invention belongs to the technical field of titanium removal from molten iron, and in particular provides a method for removing titanium by stirring a molten iron ladle Background technique [0002] Ti in steel and nitrogen or oxygen in steel form Ti(C.N) or TiO 2 Inclusions, which are brittle and hard inclusions, cause great harm to the tensile and fatigue life of steel under the condition of the same inclusion size. With the improvement of steel quality requirements and the development of new steel types, the requirements for detitanium removal are getting higher and higher. In the existing technology, the detitanium removal of molten iron adopts the smelting process of converter or electric furnace. The problem is that it is affected by the smelting temperature and molten steel oxidation, the titanium removal is difficult and the effect is unstable, and the titanium content in the steel fluctuates greatly, which leads to a decline in the qualit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/076
CPCY02P10/20
Inventor 吴巍
Owner CENT IRON & STEEL RES INST
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