Method for determining gold content in cyanidation tail liquid

A determination method and technology for gold content, applied in the measurement of color/spectral characteristics, etc., can solve the problem of inability to determine the gold content of cyanide tail liquid, and achieve the effect of convenient operation and improved work efficiency.

Inactive Publication Date: 2019-06-04
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above problems, this method provides a method for the determination of gold content in the cyanide tail liquid, to solve the current situation that the gold content in the cyanide tail liquid with highly toxic cyanide, high heavy metal and high organic matter cannot be measured, the specific steps are as follows :

Method used

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  • Method for determining gold content in cyanidation tail liquid
  • Method for determining gold content in cyanidation tail liquid
  • Method for determining gold content in cyanidation tail liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Select the unknown cyanide tail liquid of a gold enterprise as the experimental object, and carry out the determination of the amount of gold according to this method. The specific steps are as follows:

[0041]Step 1: Accurately pipette a cyanide tail liquid sample with a volume of V=50mL, place it in a 300mL conical flask, connect the hydrogen cyanide absorption device, add 80-100mL of aqua regia through the acid addition tube 2, and cover the acid addition tube cap , the hydrogen cyanide gas produced is discharged into the beaker 4 through the exhaust pipe 3, and is absorbed by the sodium hydroxide solution in the beaker 4. After the exhaust pipe 3 has no gas discharge, the hydrogen cyanide absorption device is removed, and the conical Cover the bottle with a watch glass and place it on an electric heating plate at 200°C for 1 hour, remove it and rinse the watch glass and bottle wall with water at a temperature of 40°C-60°C, add 50-80mL of water, and add 200g / L of gel...

Embodiment 2

[0058] Select the unknown cyanidation tail liquid of a certain gold enterprise different from Example 1 as the experimental object, and carry out the mensuration of gold quantity to it according to this method, concrete steps are as follows:

[0059] Step 1: Accurately pipette a cyanide tail liquid sample with a volume of V=50mL, place it in a 300mL conical flask, connect the hydrogen cyanide absorption device, add 80-100mL of aqua regia through the acid addition tube 2, and cover the acid addition tube cap , the hydrogen cyanide gas produced is discharged into the beaker 4 through the exhaust pipe 3, and is absorbed by the sodium hydroxide solution in the beaker 4. After the exhaust pipe 3 has no gas discharge, the hydrogen cyanide absorption device is removed, and the conical Cover the bottle with a watch glass and place it on an electric heating plate at 200°C for 1 hour, remove it and rinse the watch glass and bottle wall with water at a temperature of 40°C-60°C, add 50-80m...

experiment example 1

[0076] Since there is no suitable standard sample of cyanide tail liquid to verify the accuracy of this method, in this experimental example, a simulated sample with a known concentration is used to simulate the cyanide tail liquid, and then the accuracy of this method is verified through experiments.

[0077] Simulated cyanide tail liquid: simulate a cyanide tail liquid with a gold concentration of 2.00mg / L 1000mL, the configuration process is as follows, weigh 2.00mg gold mud and place it in a 250mL beaker, add 1.0g sodium cyanide, 10.0 g gelatin, 100mL water, stir at a constant speed under the action of a magnetic stirrer until the gold is completely dissolved, add water to a 1000mL volumetric flask, shake well and set aside.

[0078] Adopt the inventive method to measure gold amount in this simulated cyanidation tail liquid, concrete steps are as follows:

[0079] Step 1: Accurately pipette the above simulated cyanide tail liquid sample with a volume of V=50mL, place it in...

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Abstract

The invention discloses a method for determining the gold content in a cyanidation tail liquid. According to the method, a hydrogen cyanide absorption device is reasonably placed and experiments are conducted under a fume hood, which successfully avoids a death accident caused by hydrogen cyanide poisoning. At the same time, a sample is dissolved with aqua regia, and gold is adsorbed by activatedcarbon. The activated carbon is washed by a hydrochloric acid washing solution and an ammonium hydrogen fluoride washing solution to eliminate the influence of interfering elements thereon. The activated carbon adsorbing gold undergoes ashing, aqua regia dissolving, a process of adding hydrochloric acid with a dropper to bring the bottom of the meniscus to the line and other processes. The gold content in the sample is determined accurately and rapidly by flame atomic absorption spectroscopy.

Description

technical field [0001] The invention belongs to the technical field of methods for measuring gold content in tail liquid of cyanidation process in the gold industry, and in particular relates to a method for measuring gold content in tail liquid of cyanidation process. Background technique [0002] In the development of gold production, cyanidation, as one of the most effective methods for extracting precious metals such as gold, has been widely used in actual production, but cyanide-containing wastewater often needs to be recycled and used repeatedly, which will generate a large amount of waste cyanide Tail liquid, this part of cyanidation tail liquid not only contains a certain amount of highly toxic cyanide, but more importantly contains unextracted gold, organic matter and organic flotation agents, sometimes accompanied by a small amount of suspended matter and mud Sand, accurate measurement is difficult, and there is no uniform implementation standard; this part of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
Inventor 洪博陈永红孟宪伟芦新根刘正红张越穆岩
Owner CHANGCHUN GOLD RES INST
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