Continuous analysis method of calcium fluoride and silicon dioxide in fluorite

A technology of silica and medium calcium fluoride, which is applied in the field of fluorite analysis, can solve the problems of affecting the analysis speed, increasing the analysis cost, and strong dependence on standard samples, so as to improve production efficiency, simple equipment, and high accuracy of results Effect

Inactive Publication Date: 2017-01-18
INNER MONGOLIA BAOTOU STEEL UNION
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Problems solved by technology

[0005] The X-ray fluorescence analysis developed in recent years has realized the instrumentation of fluorite sample analysis, but because of its expensi...

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  • Continuous analysis method of calcium fluoride and silicon dioxide in fluorite

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[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the preferred embodiments of the present invention. Based on the embodiments in this application, those of ordinary skill in the art will Other similar embodiments obtained without creative work shall all fall within the scope of protection of this application.

[0027] Continuous method for the analysis of calcium fluoride and silica in fluorspar, including:

[0028] Step 1: Dissolve the fluorite sample with glacial acetic acid, filter with filter paper, place the precipitate in a platinum crucible, carefully ash it in a high-temperature furnace, burn it at 650-700 degrees for 40 minutes, take it out and place it in a desiccator, and cool it After weighing, count the quality of the platinum crucible and silicon dioxide;

[0029] Weigh 0.5000g ...

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Abstract

The invention discloses a continuous analysis method of calcium fluoride and silicon dioxide in fluorite. The method includes the steps that a fluorite sample is dissolved with glacial acetic acid, filtered by means of filter paper, precipitated and placed in a platinum crucible, and careful ashing and firing are conducted in a high-temperature furnace; residues are wetted by a few drops of water, hydrofluoric acid is added, low-temperature evaporation is conducted till the mixture is dry, then hydrofluoric acid is added again, the mixture is dried through low-temperature evaporation, and the product is taken out after firing and placed in a dryer, cooled and weighed; the platinum crucible is placed in a flask, hydrochloric acid is added for extraction, perchloric acid is added after evaporation, and the product is heated till smoking dry; the flask is taken down, hydrochloric acid dissolving salt is added, the test solution is transferred into a volumetric flask to be diluted for volume fixing, triethanolamine, water, hydroxylamine hydrochloride, a potassium hydroxide solution, magnesium sulfate and calcein are added, the mixture is titrated with an EDTA standard solution till fluorescent green disappears to become a finishing point, and the volume, consumed by calcium in the sample, of the EDTA standard solution is recorded; a blank experiment is conducted to obtain the content of calcium fluoride and silicon dioxide. The method has the advantages of being quick, accurate, simple in equipment requirement and low in analysis cost.

Description

technical field [0001] The invention relates to a fluorite analysis method, in particular to a continuous analysis method for calcium fluoride and silicon dioxide in fluorite. Background technique [0002] Fluorspar is also called fluorspar, its chemical name is CaF 2 , often emits blue-green fluorescence under ultraviolet or cathode ray irradiation, and its name is based on this characteristic. Fluorite is a common halide mineral. It is a compound composed of calcium fluoride and is an important mineral for extracting fluorine. Fluorite comes in many colors and can also be transparent and colorless. Transparent and colorless fluorite can be used to make special optical lenses. Fluorite is also used in many ways, such as as a flux for steelmaking and aluminum production, as a catalyst in the production of milky white glass, enamel products, and high-octane fuel production. Fluorite is generally granular or massive, with glass luster, mostly green or purple. Fluorite is ...

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Application Information

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IPC IPC(8): G01N5/04G01N21/78
CPCG01N5/04G01N21/78
Inventor 李虹刘建华周春玲邹新萍魏淑梅
Owner INNER MONGOLIA BAOTOU STEEL UNION
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