Method for detecting scrap steel constituent in stainless steel

A technology for composition detection and stainless steel, applied in the field of stainless steel, can solve the problems of excessive inclusion content in molten scrap, shorten the smelting time, reduce the consumption of refractory materials, and avoid mismatches

Inactive Publication Date: 2010-06-09
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the content of inclusions in melted scrap steel basically exceeds the standard in the traditional stainless steel scrap composition detection method, the present invention provides a stainless steel scrap composition detection method, which can reduce the power consumption of electric furnace smelting, shorten the smelting cycle, and improve the detection accuracy of stainless steel scrap composition

Method used

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  • Method for detecting scrap steel constituent in stainless steel
  • Method for detecting scrap steel constituent in stainless steel
  • Method for detecting scrap steel constituent in stainless steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In order to reduce the oxidation of metal chromium, which is easily oxidized in melting furnaces, and improve the detection accuracy of stainless steel scrap components, the total silicon addition is strictly controlled (the total silicon addition is 8.5~12Kg / t), so as to reduce the oxidation of chromium in the mother liquor. The batching mode, power supply mode and operating points corresponding to the melting furnace are as follows:

[0036] 1. Ingredients mode

[0037] Batching mode corresponding to melting furnace

[0038]

[0039] 2. Corresponding power supply mode

[0040]

[0041]

[0042] 3. Operation points corresponding to melting furnace times

[0043] 1) The added amount of total silicon is 9.2Kg / t (total metal added amount).

[0044] 2) When the power consumption is 202Kwh / t, the oxygen blowing volume is 4m 3 / t.

[0045] 3) When the power reaches 312Kwh / t (calculated according to the amount added), take a sample (slag sample) and start reduct...

Embodiment 2

[0053] In order to reduce the oxidation of metal chromium, which is easily oxidized in the melting furnace, and improve the detection accuracy of stainless steel scrap components, the batching is to strictly control the total silicon addition (the total silicon addition is 8.5-12Kg / t), and reduce the oxidation of chromium in the mother liquor. The second corresponding batching mode, power supply mode and operation points of the melting furnace are as follows:

[0054] 1. Ingredients mode

[0055] Batching mode corresponding to melting furnace

[0056]

[0057] 2. Corresponding power supply mode

[0058]

[0059]

[0060] 3. Operation points corresponding to melting furnace times

[0061] 1) The added amount of total silicon is 12Kg / t (total metal added amount).

[0062] 2) When the power consumption is 189Kwh / t, the oxygen blowing volume is 6m 3 / t.

[0063] 3) When the power reaches 286Kwh / t (calculated according to the amount added), take a sample (slag sample) a...

Embodiment 3

[0071] In order to reduce the oxidation of metal chromium, which is easily oxidized in melting furnaces, and improve the detection accuracy of stainless steel scrap components, the total silicon addition is strictly controlled (the total silicon addition is 8.5~12Kg / t), so as to reduce the oxidation of chromium in the mother liquor. The second corresponding batching mode, power supply mode and operation points of the melting furnace are as follows:

[0072] 1. Ingredients mode

[0073] Batching mode corresponding to melting furnace

[0074]

[0075]

[0076] 2. Corresponding power supply mode

[0077]

[0078] 3. Operation points corresponding to melting furnace times

[0079] 1) The added amount of total silicon is 8.5Kg / t (total metal added amount).

[0080] 2) When the power reaches 297Kwh / t (calculated according to the amount added), take a sample (slag sample) and start reduction. Add 1.5kg / t of ferrosilicon for reduction, and spray 2.0kg / t of ferrosilicon po...

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Abstract

The invention discloses a detection method of components of stainless steel waste steel, which pertains to the detection process of the components of the stainless steel waste steel. In the method, the mixing ratio by weight percentage of 30 to 50 percent of stainless steel waste steel, the mixing ratio by weight percentage of 12 to 17 percent of chromium-iron alloy, the mixing ratio by weight percentage of 1 to 3 percent of nickel and the mixing ratio by weight percentage of 37 to 50 percent of dephosphorizing liquid iron are added at the batching stage; the oxygen blowing amount is controlled at 0 to 6m<3> / t at the melting stage, 1.0 to 2.0kg / t of ferrosilicon powder is injected at the reduction stage, 1.5 to 3.0kg / t of ferrosilicon is added, and contents of chromium and nickel in the waste steel are finally calculated by utilizing the contents of the chromium and the nickel in the steel liquid, yields of the chromium and the nickel in an electric furnace and structure of raw materials. The detection method dilutes inclusions of the stainless steel waste steel, thus reducing the impact of the inclusions on forming the steel liquid by melting by the electric furnace, reducing power consumption used in the melting by the electric furnace, shortening the smelting period and further reducing the impact of melting down of the stainless steel waste steel on the normal production when the detection of the components is carried out.

Description

technical field [0001] The invention relates to stainless steel technology, in particular to a component detection process of stainless steel scrap. Background technique [0002] According to relevant statistics, in 2005, the nickel content of domestic stainless steel scrap was also more than 80,000 tons, and it will reach more than 150,000 tons in 2010 (exceeding the current domestic production volume); The annual output will reach more than 480,000 tons. Therefore, it is very important for the healthy development of the domestic stainless steel industry to pay attention to the recycling of stainless steel scrap. The source of stainless steel scrap is complex, and its composition uniformity is very poor. The difficulty of accurately determining the composition of stainless steel scrap has always troubled various stainless steel smelting companies. At present, the more commonly used method is to extract a certain proportion of purchased stainless steel scrap and melt it in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00G01N31/00
Inventor 祝方义池和冰蒋兴元茅卫东施允欧前胜
Owner BAOSHAN IRON & STEEL CO LTD
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