Method for determining trace elements in high-carbon ferrochrome alloy

A technology for medium and trace elements and determination methods, which is applied in the field of determination of trace elements in high-carbon ferrochrome alloys, can solve the problems of unsuitable high-carbon ferrochrome alloy determination, poor accuracy and precision, and long analysis cycle, etc., to improve the determination Good efficiency, precision, and less matrix interference

Inactive Publication Date: 2018-05-29
SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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Problems solved by technology

This type of alloy is difficult to dissolve with acid, and usually needs to be dissolved by alkali melting and then acidification. High, poor accuracy and precision, so it is not suitable for the determination of trace elements in high carbon ferrochrome alloy

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  • Method for determining trace elements in high-carbon ferrochrome alloy
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  • Method for determining trace elements in high-carbon ferrochrome alloy

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Embodiment Construction

[0014] The assay method of trace element in the high carbon ferrochrome alloy of the present invention comprises the steps:

[0015] Step 1. Preparation of the sample analysis solution. Weigh 0.2000g sample into a microwave sample dissolving tank, add 4mL perchloric acid, 2ml fluoboric acid, and 4ml water, cover the microwave sample dissolving tank lid and place it in a microwave device. Microwave dissolving the sample; after dissolving the sample, cool it to room temperature, transfer the whole amount to a 50mL plastic volumetric flask, dilute with water to the mark, and shake well to obtain the sample analysis solution;

[0016] Step 2. Preparation of standard solution. Weigh 0.1300g of high-purity chromium powder and 0.0600g of high-purity iron powder matching the sample into the sample dissolution tank, accurately add 4mL of perchloric acid, 2mL of fluoboric acid, and 4ml of water, and cover with the lid. Placed in a microwave device (Anton PaarMultiwave 3000 type), set pa...

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Abstract

The invention discloses a method for determining trace elements in a high-carbon ferrochrome alloy. The method comprises: adding acids to a certain amount of a sample, adding acids to high-purity chromium powder and high-purity iron powder, dissolving through microwave, diluting with water to respectively prepare a sample analysis solution and a standard solution, adding determined trace elementsto the standard solution according to the content range, determining the spectral line intensity of each trace element in the standard solution by using an ICP spectrum analyzer, and drawing a standard curve though the corresponding relationship between the determined spectral line intensity of each trace element and the known content; and determining the spectral line intensity of each trace element in the sample analysis solution by using the ICP spectrum analyzer, and calculating the contents of each trace element in the sample by comparing the determined spectral line intensity of each trace element to the standard curve. According to the present invention, the determination method has advantages of high sensitivity, good precision, wide linear range, less matrix interference and the like so as to meet the analysis determination of the trace elements in the high-carbon ferrochrome alloy, and further has characteristics of simple and rapid operation and determination efficiency improving.

Description

technical field [0001] The invention relates to a method for determining trace elements in high-carbon ferrochromium alloy. Background technique [0002] High-carbon ferrochromium is an important alloy used as an alloy additive in steelmaking, and it is widely used in steelmaking, especially in the smelting of silicon steel; however, in order to ensure product quality, trace elements of impurities in high-carbon ferrochrome alloys are also important to control Objects, generally the trace elements include P, Si, Mn, Ti and V. This type of alloy is difficult to dissolve with acid, and usually needs to be dissolved by alkali melting and then acidification. High, poor accuracy and precision, so it is not suitable for the determination of trace elements in high carbon ferrochrome alloy. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for the determination of trace elements in high-carbon ferrochromium allo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73
CPCG01N21/73
Inventor 张莉张艳王晗
Owner SHANGHAI BAOSTEEL IND TECHNOLOGICAL SERVICE
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