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Analyzing method of Ni content in melted steel ingot

An analysis method and content technology, applied in the field of laboratory testing in metallurgical enterprises, to achieve the effect of ensuring accuracy, accurate testing results and good use effects

Active Publication Date: 2012-03-28
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the laboratory of the processing plant uses the iron and steel method to analyze the Ni content. This method has the following defects: some insoluble matter will appear during the dissolution of the sample, and it is difficult to completely dissolve the sample, which will seriously affect the accuracy of the analysis results.

Method used

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  • Analyzing method of Ni content in melted steel ingot
  • Analyzing method of Ni content in melted steel ingot
  • Analyzing method of Ni content in melted steel ingot

Examples

Experimental program
Comparison scheme
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Embodiment

[0029] Example: This embodiment is an example of testing in May, 2007 in Shanxi Taigang Stainless Steel Co., Ltd. processing plant.

[0030] Practice shows that the present invention has good application effect, is easy for operators to master, realizes the complete decomposition of samples, and ensures the accuracy of analysis results.

[0031] Example:

[0032] The weighing amount of dust-removed ash melting steel ingot sample is 0.500g, and the sample is placed in a 600ml beaker.

[0033] Add 20ml of aqua regia to the beaker, cover the beaker with a surface dish and put it on the electric heating plate, heat it with the low temperature of the electric heating plate to generate a large number of small bubbles until the small bubbles disappear, and dissolve the sample; add hydrofluoric acid dropwise into the beaker 3-4 drops, continue to use the low-temperature gear of the electric heating plate until the reaction stops, add 5ml of perchloric acid, and continue to heat wit...

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Abstract

An analyzing method of Ni content in a melted steel ingot belongs to the test method of laboratories in metallurgy industries, and comprises the following operation links: weighing samples, dissolving samples, filtering, cleaning, ashing, melting and cooling filter matters, combining filtrate, adjusting the degree of acidity of the solution, settling, aging, filtering, drying and calculating. Theanalyzing method effectively overcomes the defects that undissolved substances often can not be resolved thoroughly in the analyzing process of melting the steel ingot by stainless steel slag or dustremoving ash, so that the sample can be resolved thoroughly, and further the effects of accurate and reliable test result can be achieved.

Description

Technical field: [0001] The invention belongs to laboratory test methods of metallurgical enterprises, in particular to a method for chemical analysis of Ni content in molten steel ingots. Background technique [0002] The molten steel ingot formed by remelting stainless steel slag or dust ash is a kind of steel slag recycling between pig iron and stainless steel. It is used as scrap steel to supply steel mills, and the content of C, S, P, Cr, Ni, and TFe needs to be analyzed. At present, the laboratory of the processing plant uses the iron and steel method to analyze the Ni content. This method has the following defects: some insoluble matter will appear during the dissolution of the sample, and it is difficult to completely dissolve the sample, which will seriously affect the accuracy of the analysis results. Invention content: [0003] The present invention proposes an analysis method for Ni content in molten steel ingots, the purpose of which is to overcome the defec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 古宏渊王彩云王卫华李莉
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD