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A semi-steel dephosphorization and desulfurization agent and its preparation method and application

A desulfurizer and dephosphorization technology, which is applied in the field of iron and steel smelting, can solve the problems of less heating elements, great difficulty in dephosphorization, and difficulty in slag making, and achieves the effects of cost saving and simple preparation method.

Active Publication Date: 2016-09-14
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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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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Examples

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Effect test

preparation example Construction

[0032] Further, the present invention also discloses a method for preparing the above semi-steel dephosphorization and desulfurization agent, comprising 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-mentioned step a is carried out in a dry atmosphere, such as dry air, nitrogen, etc.; the calcium chloride is packaged in a sealed package before use.

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

[0038]...

Embodiment 1

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

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

[0048] Among them, the CaO content in passivated lime is 83%wt.

[0049] Use the above semi-steel dephosphorization and desulfurization agent to dephosphorize and desulfurize 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 dephosphorization and desulfurization agent and passivated magnesium powder into different material tanks respectively. The material tanks are sealed with dry nitrogen. The dephosphorization and desulfurization agent is sprayed on the carrier for d...

Embodiment 2

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

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

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

[0056] Use the above semi-steel dephosphorization and desulfurization agent to dephosphorize and desulfurize 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 dephosphorization and desulfurization agent and passivated magnesium powder into different material tanks respectively. The material tanks are sealed with dry nitrogen. The dephosphorization and desulfurization agent is sprayed on the carrier for deph...

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Abstract

The invention relates to a semisteel dephosphorization and desulfurization agent and a preparation method and an application thereof, belongs to the field of steel smelting, and aims to provide a novel semisteel dephosphorization and desulfurization agent. The semisteel dephosphorization and desulfurization agent is obtained by evenly mixing the following components in parts by weight: 5 parts of graphite powder, 10-20 parts of calcium aluminate, 5-10 parts of calcium chloride, 5-10 parts of manganese dioxide, 10-20 parts of iron oxide and 40-70 parts of active lime; and passivating. Furthermore, the invention also discloses the preparation method of the semisteel dephosphorization and desulfurization agent and the application of the semisteel dephosphorization and desulfurization agent in semisteel dephosphorization and desulfurization. The semisteel dephosphorization and desulfurization agent disclosed by the invention is simple in preparation method; effective dephosphorization can be carried out under the premise of ensuring the desulfurization rate; less slag steelmaking by a steelmaking converter is facilitated; and the cost is reduced.

Description

technical field [0001] The invention relates to a semi-steel dephosphorization and desulfurization 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 Patents(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 PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP