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Desulfurizing and dephosphoring refining agent for external refining of molten steel

A technology of refining and refining agents outside the furnace, which is applied in the field of processing molten ferrous alloys. It can solve problems such as affecting production, polluting molten steel, and not being able to desulfurize, and achieve the effects of improving efficiency, improving steel performance, and simplifying operations.

Inactive Publication Date: 2009-01-21
安徽中实冶金材料工程技术研究有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The defect is: CaO-Al 2 o 3 The refining agent for out-of-furnace desulfurization of molten steel based on molten steel can only desulfurize, but cannot dephosphorize; the refining agent for dephosphorizing outside of molten steel based on CaO-FeO not only cannot desulfurize, but also after refining and making reducing slag, the molten steel will seriously return to phosphorus, polluting the molten steel and affecting production

Method used

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  • Desulfurizing and dephosphoring refining agent for external refining of molten steel
  • Desulfurizing and dephosphoring refining agent for external refining of molten steel
  • Desulfurizing and dephosphoring refining agent for external refining of molten steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Under normal temperature and pressure, according to the components and content (weight %), weighing, crushing separately, milling, batching, adding binder, mixing, granulating, drying or baking, bagging. Then carry out desulfurization and dephosphorization trial outside the molten steel furnace, and calculate the desulfurization rate η s (%), and dephosphorization rate η p (%), its experimental data are listed in table 1.

Embodiment 2

[0018] Implement the method and steps of Example 1, and the experimental data are listed in Table 1.

Embodiment 3

[0020] Implement the method and steps of Example 1, and the experimental data are listed in Table 1.

[0021] Table 1

[0022] Content of each component

[0023] It can be seen from Table 1 that the desulfurization and dephosphorization effects of the refining agent of the present invention are very good, and no phosphorus reversion phenomenon occurs at all.

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PUM

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Abstract

The present invention belongs to the field of ferrous alloy smelting treating agent, and is especially treating agent for external refining of molten steel. The treating agent contains BaO 35-70 wt%, BaF2 10-35 wt%, MnO 5-13 wt%, CaO 4-10 wt%, Al2O3 2-10 wt% and adhesive and impurity for the rest. It is used for desulfurzing and dephosphoring in external refining of molten steel. Compared with available technology, the present invention has the advantages of simultaneous external molten steel refining, desulfurzing and dephosphoring, raised production efficiency, improved molten steel quality, etc.

Description

technical field [0001] The invention belongs to the treatment of molten ferrous alloys, and in particular relates to an added treatment agent for refining outside a furnace. Background technique [0002] With the progress of society and the rapid development of industry, the requirements for the content of sulfur and phosphorus in steel are becoming more and more stringent. Reduce the content of sulfur and phosphorus in steel to produce clean molten steel. One of its main measures is to reduce the phosphorus content of the ferromanganese melt and adopt an out-of-furnace refining process. Refining agent is added during the refining process to desulfurize and dephosphorize molten steel. The current desulfurization uses CaO-Al 2 o 3 Out-of-furnace desulfurization agent based on molten steel, and CaO-FeO-based out-of-furnace dephosphorization refining agent for dephosphorization. Defects are: CaO-Al 2 o 3 The refining agent for out-of-furnace desulfurization of molten stee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/064
Inventor 颜根发黄志勇薛敬梅袁庭伟
Owner 安徽中实冶金材料工程技术研究有限公司
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