Method for determining content of lead in lead-zinc ore through adoption of an atomic absorption method and application

Abstract

The invention discloses a method for determining the content of lead in lead-zinc ore through adoption of an atomic absorption method. The method comprises the following steps: weighing a sample in abeaker, and adding water for wetting; adding hydrochloric acid, placing on an electric heating plate, heating and dissolving to a wet salt state, cooling, adding nitric acid, and continuously heatingand dissolving; and adding nitric acid during constant volume, so as to determine the lead content in the sample by adopting an atomic absorption method under a nitric acid medium. According to the method, the lead content in the lead-zinc ore can be rapidly, efficiently and accurately determined, and the measurement result is stable; according to the method, the measurement range of the grade ofa conventional sample is widened, and the measurement range of the lead content is widened to 0-10% from the original measurement range of 0-3%; and according to the invention, batch analysis of samples in a beneficiation process is realized, the working efficiency is improved, batch analysis is realized, operation steps are reduced, the labor intensity is reduced, and the labor cost and the material cost are reduced.

Description

technical field [0001] The invention relates to the technical field of geological drilling and mineral processing process sample analysis, in particular to a method and application of atomic absorption method for measuring lead content in low-grade lead-zinc ore. Background technique [0002] Generally speaking, when the lead content in the lead-zinc ore is less than 3%, in the determination method, the most commonly used method of dissolving the sample is aqua regia dissolving the sample, which is measured by atomic absorption spectrophotometry in hydrochloric acid medium, and the result is relatively stable; however, when When the content is in the range of 3% to 10%, due to the high content of lead, in the hydrochloric acid medium, lead will generate PbCl 2 Precipitation makes the determination result on the low side, resulting in inaccurate determination results; there is also a method for the determination of lead by oscillographic polarography, but the curve range of o...

AI Technical Summary

Problems solved by technology

[0004] Based on this, the purpose of the present invention is to provide a fast, efficient and accurate method and application for determining the lead content in lead-zinc ore by atomic absorption method, so as to solve the problem that the existing sample grade measurement range is small, the measurement result is unstable, and the measurement The accuracy is not high, the work efficiency is low, and batch analysis cannot be realized, etc.

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