Method for determining content of metal aluminum in ladle slag modifying agent

A determination method and metal aluminum technology are applied in the field of chemical analysis of steel-making raw and auxiliary materials, which can solve the problems of low detection accuracy and long detection time of metal aluminum content, and achieve the effects of high degree of detection automation, simple operation and reduced use.

Inactive Publication Date: 2015-03-18
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for measuring the aluminum content in the ladle slag modifier to solve the technical problems of low detection accuracy and long detection time in the prior art.

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  • Method for determining content of metal aluminum in ladle slag modifying agent

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Embodiment Construction

[0024] A method for assaying metal aluminum content in a ladle slag modifier, comprising the following steps:

[0025] a. Weigh 200g of copper sulfate and dissolve it in 1000ml of dilute sulfuric acid solution (1+4) to prepare a leaching solution with a copper sulfate concentration of 20%. Weigh 0.25g of the sample and place it in a 300ml Erlenmeyer flask, add 50ml of copper sulfate The leaching solution was boiled for about 25 minutes with an electric heating plate with a model of SC-404 and a power of 2.4KW. After the soluble sample was completely dissolved, it was removed and cooled to room temperature, and the volume was fixed in a 100ml volumetric flask, and the filtrate was obtained by dry filtration with fast filter paper;

[0026] B, be that the iCAP6300 inductively coupled plasma emission spectrometer measures the aluminum spectral intensity I in the filtrate obtained in the wavelength 308.22nm step a with the model Al ;

[0027] c. Calculate the metal aluminum conte...

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Abstract

The invention relates to a method for determining the content of metal aluminum in a ladle slag modifying agent, which mainly aims at solving the technical problems in the prior art that the precision of detection on the content of the metal aluminum in the ladle slag modifying agent is low and the time for detecting the content of the metal aluminum in the ladle slag modifying agent is long. According to the technical scheme, the method for determining the content of the metal aluminum in the ladle slag modifying agent comprises the following steps: measuring a test sample of a fixed quantity, placing the test sample into a tapered bottle with a copper sulfate leaching solution, and heating and boiling the copper sulfate leaching solution by utilizing an electric heating plate so as to selectively dissolve metal aluminum in the test sample, thereby separating the metal aluminum from other elements and aluminum in other forms in the test sample, and preparing a solution to be detected; determining spectral intensity of the aluminum in the solution to be detected by adopting an inductance coupling plasma emission spectrometer; and calculating the content of the metal aluminum in the test sample. By adopting the determination method, the content of the metal aluminum in the ladle slag modifying agent can be accurately measured, and the detection time is short and only needs 2 to 3 hours.

Description

[0001] technical field [0002] The invention relates to the technical field of chemical analysis of steelmaking raw and auxiliary materials, in particular to a method for measuring the content of metal aluminum in a ladle slag modifier. Background technique [0003] With the continuous improvement of users' requirements for steel quality, the content of inclusions in steel must be less and less, and the particle size must be smaller and smaller. This requires that the deoxidized products of molten steel must float up in time during the refining process of the ladle. In the prior art, iron and steel enterprises usually adopt the process of adding a ladle slag modifier containing metal aluminum during the refining process of molten steel in the steelmaking ladle to achieve the purpose of absorbing molten steel inclusions and improving the cleanliness of molten steel. The ladle slag modifier At the same time, it has a good deoxidation and desulfurization effect on molten steel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73
Inventor 周桂海王海军胡宏卫
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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