Composite diffusion deoxidizer and its application method

A diffusion deoxidation and deoxidizer technology, which is applied in the field of deoxidizers, can solve the problems of increasing Al2O3 inclusions, increasing other inclusions, and being unable to reduce Al2O3 inclusions, etc.

Inactive Publication Date: 2003-04-23
上海梅山(集团)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the addition of a large amount of aluminum, the Al2O3 inclusions in the steel increase, resulting in nodules in the continuous casting nozzle and a decrease in the performance of the steel
Chinese patent ZL99100131 introduces a "deoxidizer for converter steelmaking", which uses a mixture of Si, Ca, C, P, S, and Ro as a deoxidizer. This deoxidizer still cannot reduce Al2O3 inclusions and increases other inclusions thing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0004] Example 1: A converter composite diffusion deoxidizer and its use method. The composite diffusion deoxidizer adopts AlCaC composite diffusion deoxidizer. It is a deoxidizer used for pre-deoxidation of silicon-free steel grades. Its use methods include the following Steps: 1. In MoSi 2 Add 1 kilogram of steel to the furnace; 2. After the metal is melted, the temperature is 1570℃, use a constant oxygen probe to measure the dissolved oxygen in the molten steel, take steel samples and slag samples, and perform spectral analysis on the steel samples; 3 . Add 50 grams of slag material, the amount of which is 5% of the metal material; 4. 12 minutes after adding the slag material, add AlCaC composite diffusion deoxidizer, add aluminum precipitation deoxidation; 5. Refining time is 43 minutes, regularly take steel samples for spectroscopy Analyze and measure the dissolved oxygen at the same time, and finally take the end-point slag sample.

Embodiment 2

[0005] Example 2: A converter composite diffusion deoxidizer and its use method. The composite diffusion deoxidizer adopts AlCaC composite diffusion deoxidizer, which is a deoxidizer used for pre-deoxidation of silicon-free steel grades. Its use methods include the following Steps: 1. In MoSi 2 Add 1 kg of steel to the furnace; 2. After the metal is melted, the temperature is at 1600°C, use a constant oxygen probe to measure the dissolved oxygen in the molten steel, take steel samples and slag samples, and perform spectral analysis on the steel samples; 3 Add 50 grams of slag material, the amount of which is 5% of the metal material; 4. 10 minutes after adding the slag material, add 0.8 grams of AlCaC composite diffusion deoxidizer, add 0.5 grams of aluminum precipitation deoxidation; 5. Refining time is 45 minutes, take it regularly The steel sample is subjected to spectral analysis, and dissolved oxygen is measured at the same time, and finally the end slag sample is taken.

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PUM

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Abstract

The present invention provides a AlCaC dcompound diffusion deoxidant for converter, and its application method incldues the following steps: 1). adding steel material into furnace; 2). after the steel material is molten, temp. is 1550-1650 deg.C, using oxygen-determining probe to point-measure dissolved oxygen in molten steel, taking out steel sample and slag sample, making spectral analysis of sample steel, 3). adding slag material, addition quantity is 5% of metal material; 4). after 7-15 min, adding AlCaC compound diffusion deoxidant and adding aluminium to make precipitation and deoxygenation; 5). refining for 40-50 min., timing taking out steel sample and making spectral analysis, at the same time measuring dissolved oxygen, finally tanking end slag sample.

Description

(1) Technical field: [0001] The invention relates to a deoxidizer and a use method, in particular to a converter composite diffusion deoxidizer and a use method. (2) Background technology: [0002] With the accelerated pace of large-scale and grouping steelmaking plants, the capacity of converters and electric furnaces in various steel plants is increasing, and the requirements for steel quality are getting higher and higher. The competition of steel is manifested in the competition of price and quality. The deoxidation of electric furnaces has always been a subject that all metallurgists are committed to research. Even so, the traditional precipitation deoxidation method is still followed, especially for the deoxidation of silicon-containing aluminum killed steel. The method is still single. For this type of steel, steel mills often increase the amount of aluminum used, and start with continuous casting protective pouring, and do a good job of protective pouring to ensure the Al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06
Inventor 程乃良
Owner 上海梅山(集团)有限公司
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