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Calcium content determination method for low-calcium aluminum ferromanganese

A low-calcium-aluminum-manganese-ferromanganese, calcium content technology, which is applied in the direction of chemical analysis by titration, can solve the problems of low-cost, rapid and accurate measurement, high instrument cost, etc., and achieve stable titration results, simple equipment requirements, and pharmaceuticals The effect of using less

Active Publication Date: 2015-04-15
INNER MONGOLIA BAOTOU STEEL UNION
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Problems solved by technology

In order to control the process conditions, it is necessary to determine the calcium content in Almanganese ferromanganese. At present, the determination of calcium in low calcium Almanganese ferromanganese is usually carried out by plasma emission spectrometry (ICP method). need

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  • Calcium content determination method for low-calcium aluminum ferromanganese
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  • Calcium content determination method for low-calcium aluminum ferromanganese

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Embodiment Construction

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0023] Existing methods need to use large-scale instruments to determine the calcium content in low-calcium aluminum-manganese-iron, which has strict requirements on the testing environment, which directly leads to high testing costs, it is not easy to perform testing near the site, and the testing process is too complicated. In order to achieve quick and easy determination, the present invention proposes a new idea of ​​determining the calcium content in low-calcium aluminum-manganese-iron. After dissolving the sample with hydrochloric acid-hydrogen peroxide, the aluminum and iron are separated by ammonia, and ammonium persulfate is used for oxidation The manganese removal forms a colloidal precipitate. After the precipitate is separated by filtration, the mangane...

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Abstract

The invention discloses a calcium content determination method for low-calcium aluminum ferromanganese. The calcium content determination method comprises the following steps: utilizing hydrochloric acid-hydrogen peroxide to dissolve a sample; utilizing ammonia water to separate out aluminum, iron and other elements; using ammonium persulfate to oxidize and remove manganese to form colloidal precipitate; after filtering and separating out the precipitate, repeating the manganese removing process; adding hydrochloric acid to a manganese-removing solution; boiling the solution to remove superfluous ammonium persulfate; using ammonia water to regulate the pH value to be 7; splitting a part of solution; adding a masking agent to eliminate other ion interference; carrying out complexometric titration to determine the calcium element content. With application of the determination method disclosed by the invention, the calcium content in low-calcium aluminum ferromanganese can be accurately, stably, simply and efficiently determined, and the determination for the calcium content in the low-calcium aluminum ferromanganese can be faster and more convenient, so that the determination cost can be reduced.

Description

Technical field [0001] The invention relates to the technical field of detection and analysis of steel alloys, in particular to a method for determining the calcium content in low-calcium aluminum-manganese-iron. Background technique [0002] With the advancement of modern technology and the development of continuous casting and casting of steel, the quality requirements of steel are getting higher and higher. Non-metallic inclusions (mainly oxide inclusions) in steel seriously affect the quality of steel. With the introduction of the concepts of "clean steel" and "clean steel", more stringent requirements have been put forward for the control of non-metallic inclusions in steel. Theoretically, the best combination of compound deoxidizer is calcium and aluminum, and its deoxidizing ability at steelmaking temperature is stronger than other combinations. The presence of calcium not only improves the deoxidation capacity of aluminum, but also reduces the nozzle nodules during casti...

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Application Information

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IPC IPC(8): G01N31/16
Inventor 常欢戴文杰刘建华王宴秋
Owner INNER MONGOLIA BAOTOU STEEL UNION
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