Rapid analysis method for gold and silver in silver anode slime

Abstract

The invention discloses a rapid analysis method for gold and silver in silver anode slime. The method comprises the steps: a silver anode slime sample is subjected to wet-process sample dissolving treatment, then, part of coexisting elements in the sample enter a solution, filtrating is carried out, then, precipitates are dissolved with nitric acid and sulfuric acid, filtrating is carried out to separate the gold from the silver, the gold is insoluble to the nitric acid and the sulfuric acid and enters the precipitates, and the silver enters the filtrate; the content of the gold is determined by a gravimetric method, Ag<+> has higher affinity to SCN<-> than Fe<3+> in the sulfuric acid medium, the Fe<3+> and the SCN<-> are combined to produce an apricot-red ferric thiocyanate complex after the Ag<+> is precipitated completely, then, the reaction ends, and the content of the silver can be figured out according to the volume of a standard potassium thiocyanate solution consumed. The method involves experimental conditions, sample treatment, a coexisting element interference test and an accuracy experiment for confirming experiment results. The method disclosed by the invention is simple and convenient in operation, low in test cost and stable and reliable in test result, thereby being applicable to the analysis and detection on samples in an electrolysis process.

Description

technical field [0001] The invention relates to the technical field of metal testing and analysis in the metallurgical industry, in particular to a rapid analysis method for gold and silver in silver anode slime. Background technique [0002] With the continuous development of industry, the human demand for non-ferrous metals is increasing, and the world is facing the problem of scarcity of non-ferrous metal resources. Therefore, more and more people begin to pay attention to the recycling of secondary resources. Silver anode slime is the product that exists in the bottom tank of the anode during the silver electrolytic smelting process. The content of gold and silver is relatively high. At present, the methods for testing gold and silver are mainly gravimetric method and titration method. Gold separation and enrichment. Due to the high labor intensity of the fire assay method, the long analysis process, the use of many chemical reagents, and the large pollution to the envi...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a quick analysis method for gold and silver in silver anode slime that is easy to operate and low in cost, aiming at the problems of current gold and silver testing methods, such as high cost, high labor intensity, long analysis process, and environmental pollution.

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