Method for rapid determination of calcium fluoride content in fluorite by X-ray fluorescence spectrometer

Abstract

The invention discloses a method for rapidly measuring the content of calcium fluoride in fluorite by an X-ray fluorescence spectrometer. The method comprises the following steps: accurately weighing 1.5000-2.2000 g of fluorite sample and special fluorescent mixed flux 3.0-3.3 times more than the mass of fluorite sample; mixing uniformly and then placing in a gold-platinum crucible; adding 8 drops of a mold release agent lithium bromide; fusing according to a preset automatic sample fusion program in a high-frequency automatic sample fusion machine, to prepare glass sheets for analysis; placing sample pieces prepared by fusion in a wavelength dispersion type X-ray fluorescence spectrometer; selecting work parameters; using a K alpha line of fluorine as an analytical spectral line; measuring with an instrument; automatically calculating the content of calcium fluoride in the sample. The method provided by the invention overcomes a particle size effect and a mineral effect of the sample, and is easy to operate, short in time consumption, free of pollution brought by chemical reagents, wide in analysis range, high in accuracy, good in reproducibility, and suitable for measurement of various fluorite components, in particular measurement of calcium fluoride in fluorite ore with high content of calcium carbonate and calcium sulfate.

Description

technical field [0001] The invention relates to a method for detecting calcium fluoride content, in particular to a method for measuring calcium fluoride content in fluorite by using an X-ray fluorescence spectrometer. Background technique [0002] Fluorspar, also known as fluorspar, has the chemical formula CaF 2 , is a natural halogen compound of calcium and is the most useful fluorine mineral in industry. Fluorite has the characteristics of lowering the melting point of refractory substances, promoting the flow of slag, separating slag and metal well, desulfurizing and dephosphorizing during the smelting process, and enhancing the forgeability and tensile strength of metals. Therefore, it is widely used as a flux in iron and steel smelting and ferroalloy production, ferrochemical process and non-ferrous metal smelting. In the chemical industry, fluorite is mainly used to manufacture chemicals such as hydrofluoric acid and its derivatives (sodium fluoride, ammonium fluor...

AI Technical Summary

Problems solved by technology

However, this method still uses manual titration, and the color change of the titration end point is difficult to grasp, and the test accuracy is greatly affected by the experience of laboratory testers.

Images