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Fluxing agent and use method thereof

A technology of flux and mass fraction, applied in the direction of manufacturing converters, etc., can solve the problems such as difficulty in adapting to the demand for dephosphorization of molten steel, poor dephosphorization effect, etc.

Active Publication Date: 2022-04-19
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to overcome the above-mentioned shortcoming of the prior art, provide a kind of flux and its using method, in order to solve the difficulty in the slagging process in the existing converter process To meet the needs of molten steel dephosphorization, the problem of poor dephosphorization effect

Method used

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  • Fluxing agent and use method thereof
  • Fluxing agent and use method thereof
  • Fluxing agent and use method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The composition of flux in the present embodiment is as shown in table 1 below:

[0038] The flux composition of table 1 embodiment 1

[0039]

[0040] The use process of this flux includes the following steps:

[0041] Step 1, when the silicon content in the molten iron is less than 0.5%, the gun position is suitable for high and low. Before and during the converter smelting, the flux is added gradually according to the slag formation; during the whole smelting process, the amount of flux added is 3kg per ton of steel. The specific composition of the slagging material is 8% of dolomite, 10% of bauxite, 75% of lime, 2-4% of crude aluminum,

[0042] Step 2: During the blowing process, add corresponding high-calcium ash and a small amount of flux in batches according to the condition of the slag. When adding the flux, the lance position can be lowered, and after adding the oxygen lance can be raised. When slag is melted, judge according to the flame The oxygen lance...

Embodiment 2

[0063] The flux composition of table 1 embodiment 2

[0064]

[0065] The use process of this flux includes the following steps:

[0066] Step 1, when the silicon content in the molten iron is less than 0.5%, the gun position is suitable for high and low. Before and during the converter smelting, the flux is added gradually according to the slag formation; during the whole smelting process, the amount of flux added is 3kg per ton of steel. The specific composition of the slagging material is 8% of dolomite, 10% of bauxite, 75% of lime, 3% of crude aluminum,

[0067] Step 2: During the blowing process, add corresponding high-calcium ash and a small amount of flux in batches according to the condition of the slag. When adding the flux, the lance position can be lowered, and after adding the oxygen lance can be raised. When slag is melted, judge according to the flame The oxygen lance moves around to reduce the slag back-drying and control the bad phenomenon of splashing. A...

Embodiment 3

[0071] The flux composition of table 1 embodiment 2

[0072]

[0073] The use process of this flux includes the following steps:

[0074] Step 1, when the silicon content in the molten iron is less than 0.5%, the gun position is suitable for high and low. Before and during the converter smelting, the flux is added gradually according to the slag formation; during the whole smelting process, the amount of flux added is 3kg per ton of steel. The specific composition of the slagging material is 5% of dolomite, 13% of bauxite, 65% of lime, 2% of crude aluminum,

[0075] Step 2: During the blowing process, add corresponding high-calcium ash and a small amount of flux in batches according to the condition of the slag. When adding the flux, the lance position can be lowered, and after adding the oxygen lance can be raised. When slag is melted, judge according to the flame The oxygen lance moves around to reduce the slag back-drying and control the bad phenomenon of splashing. A...

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Abstract

The invention discloses a fluxing agent and a use method thereof, the fluxing agent is a powdery pressed ball, and the physicochemical indexes are relatively stable; after being added into a furnace, the fluxing agent is rapidly decomposed into small particles in a high-temperature environment, the fluxing agent is prepared through briquetting and is a blocky fluxing agent, the lime content of the fluxing agent is far higher than that of an existing slagging agent and is matched with the components of FeO and SiO2, and when the fluxing agent is added into the steelmaking slagging process, due to the fact that the lime content is high, the activity is high, and slagging is rapid, the fluxing agent can be rapidly decomposed into small particles. And meanwhile, the formation of a high-melting-point compound C2S is prevented, the melting speed of the slag is greatly increased, and the dephosphorization effect in the blowing process is obviously enhanced.

Description

technical field [0001] The invention belongs to the technical field of converter steelmaking, and in particular relates to a flux and a using method thereof. Background technique [0002] The main task of converter smelting is prominently reflected in dephosphorization. As we all know, the thermodynamic conditions for phosphorus removal are low temperature, high alkalinity, large amount of slag, and proper oxidation. The slagging method of existing converter smelting is mostly adding different slagging materials such as lime and alumina in batches, but because the molten steel composition changes rapidly during the converter blowing process, it is difficult to adjust the slag composition to adapt to the change of molten steel composition. In the actual operation process, due to improper control, the dephosphorization effect in the early stage is often poor, and the phosphorus returns in the middle and late stages, which affects the production rhythm, increases the consumpti...

Claims

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Application Information

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IPC IPC(8): C21C5/28C21C7/064
CPCC21C5/28C21C7/0645
Inventor 杨双平赵双河刘海金王苗刘起航董洁刘守满张甜甜
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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