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Method for controlling titanium of pure steel

A pure steel and titanium removal technology, which is applied in the field of pure steel control, can solve the problems of complex titanium content process and high cost, and achieve the effects of reducing titanium control costs, increasing capital costs, and saving costs

Active Publication Date: 2014-01-29
BEIJING SHOUGANG CO LTD
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for controlling titanium in pure steel, which solves the technical problem of reducing the titanium content in pure steel with complex process and high cost in the prior art

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  • Method for controlling titanium of pure steel

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Embodiment 1

[0029] Step 201: Detitanium removal from hot metal: Detitanium removal from hot metal is carried out in two steps. First, add titanium removal agent to the torpedo tank before tapping in the iron factory, add 15KG-30KG / T iron oxide scale to the torpedo tank, and then pour it in the steel factory. Add titanium removal agent into the iron ladle before tapping the iron at the tank station, among which, add 15KG-30KG / T iron oxide scale into the iron ladle;

[0030] Step 202: Then tap the iron, stir by using the impact effect in the tapping process to make it undergo sufficient detitanium reaction, and add a slag pressing agent to the molten iron to press the slag, and the slag pressing agent can be added in 3-4 times, To prevent the top slag from overflowing, in the embodiment of the present invention, the slag pressing agent is a wooden square of 70cm×70cm×10cm, and it is calmed down for 10-20 minutes after tapping is completed, so that the detitanium product is fully floated;

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Abstract

The invention discloses a method for controlling titanium of pure steel and belongs to the technical field of pure steel control. The method for controlling titanium comprises the following steps: adding a titanium removing agent into a torpedo ladle before tapping of an iron plant, and adding a titanium removing agent into an iron ladle before tapping of a reladling station of a steel plant; tapping and adding a slag pressing agent into molten iron in the tapping process to press slag; completely removing titanium removing slag before desulfurization of a KR desulfurization station, and completely removing desulfurization slag after desulfurization is finished; blowing by using a converter and performing steel retaining operation; performing RH refining treatment, adding a desulfurizing agent, performing alloying and desulfurization treatment, and performing continuous casting on molten steel plate blanks. According to the method for controlling titanium disclosed by the invention, iron scale is added into the torpedo ladle and the iron ladle, and reaction is finished by utilizing iron flow impact, so high titanium removing ratio is achieved; during RH refining, high TFe and low alkalinity of top slag are controlled, so that the thermodynamic condition of titanium return reaction among steel slag can be reduced and the titanium return amount can be reduced.

Description

technical field [0001] The invention belongs to the technical field of pure steel control, in particular to a method for controlling titanium in pure steel. Background technique [0002] Titanium in molten steel is very easy to form small and stable TiC and TiN. These fine inclusions will reduce the purity of steel, cause continuous casting water nodules or crystallizer fish, and then affect various properties of steel. Therefore, for high-quality pure steel, it is particularly important to control the titanium content in the steel. [0003] The prior art molten iron ladle stirring detitanium method includes a set of equipment including "storage tank, blowing tank, stirring paddle" and other equipment to realize the operation of molten iron detitanium removal, which requires a large amount of investment to occupy the site. In addition, the prior art also discloses a process for detitanium removal from molten iron using a dephosphorization station, but it is necessary to use...

Claims

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Application Information

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IPC IPC(8): C21C7/04C21C1/04C21C7/10
Inventor 赵艳宇张涛刘珍童刘宇邹伟龙程林庞炜光岳铁军
Owner BEIJING SHOUGANG CO LTD
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