A method for rapidly determining the content of various elements in rare earth metals

Abstract

The present invention belongs to the technical field of element determination in a rare earth metal / an alloy, and in particular relates to a method for rapid determination of content of rare earth elements and non rare earth elements in the rare earth metal / the alloy on the basis of full spectrum direct reading spark emission spectrometry. The method includes the following steps: (1) sample pretreatment; (2) setting of excitation conditions of a spark light source; (3) selecting of an analysis line pair; (4) establishing of a working curve; (5) curve correction; and (6) sample analysis. No chemical reagent is used, a solid sample can be directly detected, determination time is shortened to within 2 minutes from a few hours of that of a national standard method, determination results are consistent with those of the national standard method, precision is good, and a blank for rapid element determination of the rare earth metal / the alloy is filled.

Description

technical field [0001] The invention belongs to the technical field of determination of elemental components in rare earth metals, in particular to a rapid determination of rare earth elements and molybdenum, iron, carbon, phosphorus, sulfur, aluminum, silicon and copper in rare earth metals based on full-spectrum direct-reading spark emission spectrometry , chromium, nickel, calcium, magnesium, tungsten, niobium, tantalum, titanium, manganese, zinc, lead, thorium, zirconium, cadmium, nitrogen, sodium and other non-rare earth elements. Background technique [0002] Rare earth metals are the products of rare earth smelting and separation. Rare earth metals include single rare earth metals and mixed rare earth metals. Single rare earth metals include scandium metal, yttrium metal, lanthanum metal, cerium metal, praseodymium metal, neodymium metal, samarium metal, europium metal, gadolinium metal , metal terbium, metal dysprosium, metal holmium, metal erbium, metal thulium, met...

AI Technical Summary

Problems solved by technology

X-ray fluorescence spectrometry can only measure elements with atomic numbers greater than 12, but cannot determine the content of C and N, and for impurity elements with content less than 0.05% and elements with smaller atomic numbers such as Mg, Al, Si, P, S, etc. The repeatability of the measurement results is poor and the error is large

Inductively coupled plasma spectroscopy or mass spectrometry also cannot determine the content of C and N, and the sample pretreatment steps are cumbersome and time-consuming, and a large amount of chemical reagents need to be added for digestion, which not only pollutes the environment, but also may introduce new impurities, and the processing and testing time of a single sample It takes about 1 day

Using these two methods for analysis is inefficient and cannot quickly reflect the relationship between process adjustment and product quality level. Therefore, the rare earth smelting and separation industry urgently needs a rapid analysis technology to guide production process adjustment.

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