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Semisteel desulfuration dephosphorization agents and preparing method and application thereof

A technology for dephosphorization agent and application, which is applied in the field of iron and steel smelting, can solve the problems of less heating elements, difficulty in dephosphorization, difficulty in slagging, etc., and achieves the effect of simple preparation method and cost saving

Active Publication Date: 2015-03-25
SICHUAN PAN YAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the semi-steel obtained after vanadium extraction contains trace amounts of silicon and manganese, which results in slag formation and less heating elements during converter steelmaking, making slagging difficult and dephosphorization extremely difficult

Method used

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preparation example Construction

[0032] Further, the present invention also discloses a method for preparing the above semi-steel desulfurization and dephosphorization agent, which includes the following steps:

[0033] c. Mixing each component according to the proportioning ratio to obtain a mixed material;

[0034] d. Passivate the mixed material with a passivation solution.

[0035] Further, in the step b, there is no specific requirement on the type and amount of the passivation solution, in short, it is enough to passivate the mixed material.

[0036] Further, in order to prevent moisture absorption, the above step a is carried out in a dry atmosphere, such as dry air, nitrogen, etc.; the sodium salt is packaged in a sealed package before use.

[0037] Further, the present invention also discloses the use of the above semi-steel desulfurization and dephosphorization agent in semi-steel desulfurization and dephosphorization. As a preferred solution, its dosage is 5-7kg / t semi-steel.

[0038] Further, t...

Embodiment 1

[0046] Preparation of semi-steel desulfurization and dephosphorization agent:

[0047] Mix 5kg of carbon powder, 15kg of calcium aluminate, 5kg of sodium carbonate, 5kg of sodium chloride, 20kg of iron oxide and 50kg of active lime and passivate it with a passivation solution to obtain semi-steel desulfurization and dephosphorization agent.

[0048] Among them, the CaO content in passivated lime is 86%wt.

[0049] Use the above semi-steel desulfurization and dephosphorization agent to desulfurize and dephosphorize the semi-steel:

[0050] After the converter vanadium extraction is completed, the undesulfurized and dephosphorized semi-steel is transported to the injection desulfurization station. Before desulfurization, put the desulfurization and dephosphorization agent and passivated magnesium powder into different material tanks. The material tanks are sealed with dry nitrogen. The carrier sprays passivated magnesium powder for desulfurization, the spray gun is 1500mm away...

Embodiment 2

[0053] Preparation of semi-steel desulfurization and dephosphorization agent:

[0054] Mix 5kg of carbon powder, 5kg of calcium aluminate, 10kg of sodium carbonate, 5kg of sodium chloride, 20kg of iron oxide and 55kg of active lime and passivate it with a passivation solution to obtain semi-steel desulfurization and dephosphorization agent.

[0055] Among them, the CaO content in passivated lime is 87%wt.

[0056] Use the above semi-steel desulfurization and dephosphorization agent to desulfurize and dephosphorize the semi-steel:

[0057] After the converter vanadium extraction is completed, the undesulfurized and dephosphorized semi-steel is transported to the injection desulfurization station. Before desulfurization, put the desulfurization and dephosphorization agent and passivated magnesium powder into different material tanks. The material tanks are sealed with dry nitrogen. The carrier sprays passivated magnesium powder for desulfurization, the spray gun is 500mm away ...

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Abstract

The invention relates to a semisteel desulfuration dephosphorization agent and a preparing method and application thereof and belongs to the field of steel smelting. The invention aims at providing a novel semisteel desulfuration dephosphorization agent. The semisteel desulfuration dephosphorization agent is obtained by well mixing and then passivating, by weight, 5 parts of carbon powder, 5-15 parts of calcium aluminate, 5-10 parts of sodium carbonate, 5-10 parts of sodium chloride, 10-20 parts of ferric oxide and 50-70 parts of active lime. The invention further discloses the preparing method of the semisteel desulfuration dephosphorization agent and the application in semisteel desulfuration dephosphorization. The preparing method of the semisteel desulfuration dephosphorization agent is simple, effective dephosphorization can be carried out under the premise that the desulfuration rate is guaranteed, less slag steelmaking by a steelmaking converter can be well carried out, and cost is saved.

Description

technical field [0001] The invention relates to a semi-steel desulfurization and dephosphorization agent, a preparation method and application thereof, and belongs to the field of iron and steel smelting. Background technique [0002] my country is a big country of vanadium-titanium-magnetite. The molten iron smelted from vanadium-titanium-magnetite blast furnace has higher vanadium content than ordinary molten iron, and vanadium is an important resource. Therefore, vanadium must be extracted from molten iron to produce vanadium slag before steelmaking. However, the semi-steel obtained after vanadium extraction has trace amounts of silicon and manganese, which results in slag formation and less heating elements during converter steelmaking, making slagging difficult and dephosphorization extremely difficult. However, it is precisely because of this characteristic of semi-steel that it also provides good conditions for dephosphorization before the converter: no special desili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/064
Inventor 陈炼戈文荪王建曾建华董克平黄正华李龙蒋龙奎杨森祥
Owner SICHUAN PAN YAN TECH
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