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Analysis method for chromium content in chromium iron alloy and silicon chromium alloy

A technology of silicon-chromium alloy and analysis method, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, can solve the problems of complex measurement process and interfering elements in the measurement process, etc. Achieve the effects of cost reduction, simple and fast assay analysis process, and loss reduction

Inactive Publication Date: 2016-05-11
WUHU XINXING DUCTILE IRON PIPES
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Problems solved by technology

And it is easy to introduce many impurities when leaching the melt, which makes the measurement process have interfering elements, making the measurement process complicated

Method used

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Embodiment Construction

[0015] The specific implementation of the present invention will be described in further detail below through the description of the embodiments, so as to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concepts and technical solutions of the present invention.

[0016] The invention relates to a method for analyzing chromium content in ferrochromium and silicon-chromium alloys. In order to solve the problems existing in the prior art and overcome its defects, realize the invention purpose of reducing the experimental cost and avoiding the influence of impurities on the experimental results, the technical scheme adopted by the present invention is:

[0017] The heating in the method for analyzing the chromium content in ferrochromium and silicon-chromium alloys of the present invention adopts a porcelain crucible.

[0018] In the experiment, a porcelain crucible was used instead of a nickel crucible, although at high tem...

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Abstract

The invention discloses an analysis method for the chromium content in chromium iron alloy and silicon chromium alloy. The method comprises: weighing a sample, placing in a ceramic crucible containing sodium peroxide in advance, stirring fully and uniformly, covering on the surface with the sodium peroxide, keeping for 5min at 700 DEG C, taking out and slightly shaking the ceramic crucible; then placing on a refractory brick and cooling; after naturally cooling, placing the ceramic crucible in a beaker containing hot water in advance, adding H2SO4, and leaching inner fusant; after reaction is finished, drenching the ceramic crucible and lid in the beaker, and adding ammonium persulfate and the like; heating and boiling till a volume is 250ml, adding a NaCl solution, slightly boiling for a moment till while sediment occurs, and taking down and cooling to room temperature; adding phosphoric acid, water and sodium diphenylaminesulfonate indicator, and performing titration with ammonium ferrous sulfate till light green color occurs. By adopting the crucible technical solution, an experiment cost is reduced, and loss of noble metal is omitted; influences of other interference factors are avoided and a test analysis process becomes simple and fast.

Description

technical field [0001] The invention belongs to the technical field of material component analysis experiments. More specifically, the present invention relates to a method for analyzing chromium content in ferrochromium and silicon chromium alloys. Background technique [0002] The melting point of nickel is high, reaching 1455°C, and the nickel crucible has good corrosion resistance to alkaline substances. It has almost no effect with strong alkali. In the analysis laboratory, it is mainly used for alkaline solvents to treat refractory materials such as minerals and slag. Alkaline solvents such as sodium hydroxide and sodium carbonate can be melted in nickel crucibles. [0003] In the national standard, nickel crucibles are used for experiments, and there are the following problems: [0004] The melting temperature of a nickel crucible should not exceed 700°C, because at high temperatures, nickel is easily oxidized and corroded by sodium peroxide, resulting in loss of pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 丁连萍王青竹
Owner WUHU XINXING DUCTILE IRON PIPES
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