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Measuring method of copper, plumbum, zinc, manganese, cadmium and chromium in cyaniding tail liquid

A technique for the determination of lead, zinc, manganese, cadmium, chromium, and a method for determining chromium, copper, zinc, lead, manganese and cadmium in the tail liquid of cyanidation process in the gold industry, can solve the problem that metal ions cannot be quickly and accurately determined, etc. Achieving the effect of avoiding human injury, accurate method and convenient operation

Inactive Publication Date: 2018-10-19
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for measuring copper, lead, zinc, manganese, cadmium, and chromium in cyanide tail liquid to solve the problem of metal ions in cyanide tail liquid with high toxicity, high heavy metals, high organic matter, and a small amount of carbon, sulfur, and silicate. The status quo that cannot be measured quickly and accurately

Method used

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  • Measuring method of copper, plumbum, zinc, manganese, cadmium and chromium in cyaniding tail liquid
  • Measuring method of copper, plumbum, zinc, manganese, cadmium and chromium in cyaniding tail liquid
  • Measuring method of copper, plumbum, zinc, manganese, cadmium and chromium in cyaniding tail liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0035] The unknown cyanide tail liquid of a gold enterprise was selected as the experimental object, and the metal ions copper, lead, zinc, manganese, cadmium and chromium were determined on it.

[0036](1) Accurately measure 25mL of cyanide tail liquid V with a measuring cylinder, place it in a 300mL conical flask, add 0.5g of potassium chlorate, 0.2g of ammonium bifluoride, connect the hydrogen cyanide absorption device, add 5mL of nitric acid at the acid inlet, and immediately Cover the acid inlet, shake well, place on the electric heating plate and heat for 5 minutes, the hydrogen cyanide produced is fully absorbed by the sodium hydroxide absorption solution at the right end, then add 10mL nitric acid through the acid inlet, cover and place on the electric heating plate Heat and digest until the remaining volume is 8mL, take it off and cool slightly, and remove the hydrogen cyanide absorption device;

[0037] The above operations were all carried out under a fume hood, and...

Embodiment 2

[0045] The unknown cyanide tail liquid of another gold enterprise was selected as the experimental object, and the metal ions copper, lead, zinc, manganese, cadmium and chromium were determined on it.

[0046] (1) Accurately measure 25mL of cyanide tail liquid V with a measuring cylinder, place it in a 300mL conical flask, add 0.8g of potassium chlorate and 0.3g of ammonium bifluoride, connect the hydrogen cyanide absorption device, add 7mL of nitric acid at the acid inlet, and immediately Cover the acid inlet, shake well, place on the electric heating plate and heat for 7 minutes, the hydrogen cyanide produced is fully absorbed by the sodium hydroxide absorption solution at the right end, then add 13mL nitric acid through the acid inlet, cover and place on the electric heating plate Heat and digest until the remaining volume is about 10mL, then remove it to cool slightly, and remove the hydrogen cyanide absorption device;

[0047] The above operations were all carried out und...

Embodiment 3

[0055] Include the following steps:

[0056] (1) Accurately measure 25mL of cyanide tail liquid V with a graduated cylinder, place it in a 300mL conical flask, add 1g of potassium chlorate, 0.5g of ammonium bifluoride, connect the hydrogen cyanide absorption device, add 8mL of nitric acid at the acid inlet, and immediately Cover the acid inlet, shake well, place on the electric heating plate and heat for 10 minutes, the hydrogen cyanide produced is fully absorbed by the sodium hydroxide absorption solution at the right end, then add 15mL nitric acid through the acid inlet, cover and place on the electric heating plate Heat it, and when it is digested to a volume of 10mL, remove it to cool slightly, and remove the hydrogen cyanide absorption device;

[0057] The above operations were all carried out under a fume hood, and personal protective equipment was worn to avoid personal injury caused by hydrogen cyanide. figure 1 As shown, acid addition port 1, reaction solution 2, sod...

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Abstract

The invention relates to a measuring method of copper, plumbum, zinc, manganese, cadmium and chromium in cyaniding tail liquid, and belongs to a measuring method of metal in chromium in cyaniding tailliquid. The method comprises the following steps: putting cyaniding tail liquid into a conical flask, adding potassium chlorate and ammonium bifluoride into the cyaniding tail liquid, ensuring that asample is connected with a hydrogen cyanide absorption device, adding nitric acid, adding perchloric acid and sulfuric acid after the sample is degraded, then performing steaming till the sample is dry, slightly cooling, adding hydrochloric acid for leaching, and adopting an inductively coupled plasma emission spectrum to analyze a standard solution, a blank and the sample, so as to measure the content of each metal in the cyaniding tail liquid. The analysis method is practicable, effective, accurate and rapid, and meanwhile is convenient to operate, can realize batch operation of samples, and has important significance on real-time monitoring of the content of heavy metal ion in the cyaniding tail liquid, and recovery utilization of valuable metal, and the environmental sustainability.

Description

technical field [0001] The invention relates to a method for determining copper, lead, zinc, manganese, cadmium and chromium in the tail liquid of the cyanidation process in the gold industry. Background technique [0002] During the development of gold production, cyanidation, as one of the most effective methods for extracting precious metals such as gold and silver, has been more and more widely used in actual production. Due to the use of cyanide gold extraction process, cyanide-containing wastewater often needs to be recycled and used repeatedly, which leads to a large amount of heavy metals such as copper, zinc, lead, manganese, cadmium, chromium and other heavy metals in the cyanide tail liquid. At the same time, there are organic matter and The characteristics of organic flotation agents can be summarized as highly toxic cyanide, high heavy metals, high organic matter, a small amount of carbon, sulfur and silicate, and sometimes accompanied by a small amount of suspe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73
CPCG01N21/73
Inventor 洪博陈永红孟宪伟芦新根刘正红苏广东关国军
Owner CHANGCHUN GOLD RES INST
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