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Refining method by in situ extraction of inclusion content in melting steel

A technology of inclusions and molten steel, which is applied in the refining field of in-situ extraction of inclusions in molten steel, can solve problems such as difficulty in realizing large-scale industrial production of molten steel, insufficient refining process of molten steel, and difficulty in achieving zero-inclusion molten steel, etc., to reduce production costs , Efficient removal, simple process effect

Inactive Publication Date: 2009-01-28
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] As mentioned above, the existing molten steel refining process is insufficient, making it difficult to achieve large-scale industrial production of relatively high-purity molten steel, and it is even more difficult to achieve zero-inclusion molten steel

Method used

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  • Refining method by in situ extraction of inclusion content in melting steel
  • Refining method by in situ extraction of inclusion content in melting steel
  • Refining method by in situ extraction of inclusion content in melting steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] see figure 1 , figure 2 and image 3 1Kg of alkaline earth metal aluminum and 1Kg of magnesium are ball-milled into powder with a vacuum ball mill, and the particle diameter is about 60-100 mesh. Use an ordinary ball mill to grind the silicic acid glass powder B into a powder. The glass powder B uses 5Kg of cheap serpentine ore powder. Its chemical structure is Mg6[Si4O10](OH)8, of which MgO accounts for 40- 45%, SiO 2 40-45%, H 2 O accounts for 10-20%. Grind into 70-100 mesh powder, and dry and dehydrate.

[0057] Then the alkaline earth metal balls and the serpentine ore powder are mixed evenly and put into the storage tank 22 . The argon gas is dehydrated through a desiccant, dried with molecular sieves, compressed and pressurized to 7Mpa by a compressor. The compressed argon gas passes through the above-mentioned mixed powder storage tank 22 . The compressed gas takes the powder away, and then sprays it into the 50T molten steel G at 1600 degrees. The proce...

Embodiment 2

[0073] In addition to using a vacuum ball mill to grind 2Kg of alkaline earth metal aluminum and 2Kg of magnesium into powder, the particle diameter is about 60-80 mesh. Use an ordinary ball mill to grind the siliceous glass powder into a powder. The glass powder uses 10Kg of cheap serpentine ore powder and grinds it into a powder of 100-120 mesh. The steel is 50T, and other processes are shown in the example. 1. In situ extraction of inclusions in molten steel.

Embodiment 3

[0075] In addition to using a vacuum ball mill to grind 1Kg of alkaline earth metal aluminum and 2Kg of magnesium into powder, the particle diameter is about 80-100 mesh. The silicic acid glass powder is ball-milled into powder with an ordinary ball mill, and the glass powder adopts 8Kg of cheap serpentine mineral powder, and is ground into a 120-140 mesh powder, and the steel is 45T, and other processes are the same as in Example 1 . In situ extraction of inclusions in molten steel.

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Abstract

The invention relates to a method for realizing in-situ extraction of impurities in molten steel. According to the method of the invention, argon and alkaline metal powder-fine ore glass compound powder are adopted and dispersed and distributed to the molten steel through bubbles, therefore, the tiny impurities generated during the deoxidation and desulfurization courses of alkaline metal are in-situ captured by a silicate glass solvent; simultaneously, the bubbles and the silicate glass solvent can also effectively capture the impurities during the floating process, thus realizing the goal of in-situ extraction of the impurities in the molten steel. According to the method of the invention, cheap serpentine fine ore is used as the solvent for the refining of the molten steel, thus reducing the production cost; the technique of in-situ extraction of the impurities in molten steel is simple and can highly and effectively remove the impurities in the molten steel.

Description

technical field [0001] The invention relates to a steel smelting method, in particular to a refining method for in-situ extraction of inclusions in molten steel. Background technique [0002] With the development of science and technology, users of iron and steel metallurgical products continue to ask metallurgical enterprises to improve steel performance. Now, the use of secondary metallurgy technology can basically control the chemical composition of steel within the range required by users. However, the production of high-quality clean steel has always been a major issue in this field. Because, in the process of steel smelting, it is inevitable to bring some impurities (such as manganese, silicon, sulfur, phosphorus, non-metallic impurities and certain gases, such as nitrogen, hydrogen, oxygen, etc.), these harmful elements and Alloying elements form various non-metallic inclusions. [0003] For example, oxides and silicates are formed by adding deoxidizers in the stee...

Claims

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Application Information

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IPC IPC(8): C22C33/04C21C7/04
Inventor 张立方园
Owner BAOSHAN IRON & STEEL CO LTD
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