Rapid simultaneous detection method for content of copper, zinc and iron in gold mud

A technology of copper, zinc and iron content, which is applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions.

Active Publication Date: 2015-11-11
山东黄金冶炼有限公司
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Problems solved by technology

[0011] The technical problem to be solved by the present invention is to provide a rapid joint measurement method for the content of copper, zinc and iron in gold mud in view of the characteristics of gold

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  • Rapid simultaneous detection method for content of copper, zinc and iron in gold mud
  • Rapid simultaneous detection method for content of copper, zinc and iron in gold mud

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[0088] The present invention will be further described below in conjunction with specific embodiments.

[0089] Main reagents:

[0090] Reagents, standard solutions, etc., which are the same as the requirements in GB / T7739.4, 6, and 7, will not be repeated, and the differences are specifically described in the specification of the present invention.

[0091] Sample pretreatment:

[0092] Put the prepared gold mud sample (hereinafter referred to as the sample) into a constant temperature drying oven, set the temperature to 105-110°C, dry it for constant weight, take it out and cool it to room temperature in a desiccator for later use. The main purpose of this process is to remove the moisture in the sample and ensure the accuracy of the volumetric analysis results.

[0093] Analysis steps:

[0094] 1. Dissolve the sample: accurately weigh 0.2000g~1.0000g sample in a 300mL beaker, moisten it with a little water, add 15mL nitric acid (1+1), cover with a watch glass, and heat it on a hot pl...

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Abstract

The invention relates to a rapid simultaneous detection method for the content of copper, zinc and iron in gold mud. A sample is dissolved by utilizing nitric acid, aqua regia, sulfuric acid and nitric-sulfuric acid; after sulfuric acid is added for smoking, a copper-zinc-iron compound is decomposed to form a corresponding oxide, HAuCl4 is decomposed to form elemental gold, and H<n-1>[AgCln]<-n+1> is decomposed to form silver chloride; after sulfuric acid is added for dissolving salts, the copper iron zinc oxide is dissolved to form sulfate; after ammonia water is added, silver-copper-zinc is transformed into corresponding ammonia complex ions, iron is transformed into iron hydroxide precipitation, and gold and iron are filtered and then separated from filtrate; after the pH value of the filtrate is adjusted by adding sulfuric acid and ammonia water, sodium chloride is added for precipitation of silver, the silver is recovered by filtering, copper in the filtrate is detected by adopting iodometry, and zinc is detected by adopting an EDTA method; and iron is detected by using a potassium dichromate method. The sample consumption is less in a detection process, precious metals can be effectively classified and recovered, the detection process is simplified, the energy consumption is reduced, and the detection efficiency is improved.

Description

technical field [0001] The invention relates to a gold mud composition detection method, in particular to a joint detection method for copper, zinc and iron content in gold mud. Background technique [0002] Gold mud is an important intermediate product in the process of gold smelting. It is a black muddy substance obtained by adding reducing substances to the cyanide-containing liquid. In addition to gold and silver, it is mainly composed of copper, iron, lead, zinc, etc. Composition of base metals. [0003] At present, there is no unified and standardized analysis method for the detection of impurity elements in gold mud, and it is usually carried out with reference to the chemical analysis method of alloy gold (GB / T15249) and the chemical analysis method of gold concentrate (GB / T7739). However, this type of method has great disadvantages, mainly in: [0004] First, the national standard is formulated for two specific products, alloy gold and gold concentrate, and the ...

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Application Information

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IPC IPC(8): G01N21/78
Inventor 单召勇
Owner 山东黄金冶炼有限公司
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