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Method for measuring cyanide in cyanidation tailings

A technology of cyanide tailings and measurement methods, which is applied in the direction of measuring devices, test sample preparation, instruments, etc., can solve the problems of large measurement errors and many interference factors, achieve good detection results, simple measurement procedures, and easy promotion Effect

Inactive Publication Date: 2018-06-22
CHANGCHUN GOLD RES INST
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Problems solved by technology

The existing methods for the determination of solid cyanide include "Spectrophotometric Method for the Determination of Soil Cyanide and Total Cyanide" (HJ745-2015), and the content of cyanide and its heavy metals and other pollutants in the cyanide tailings of the gold ore industry is relatively high. For ordinary soil, the content is much higher. If the "Spectrophotometric Method for the Determination of Cyanide and Total Cyanide in Soil" (HJ745-2015) is used to monitor the cyanide content in the cyanide tailings of the gold ore industry, there are many interference factors. Large measurement error

Method used

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  • Method for measuring cyanide in cyanidation tailings
  • Method for measuring cyanide in cyanidation tailings

Examples

Experimental program
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Effect test

Embodiment 1

[0043] precision test

[0044] Take cyanide tailings from two different gold production enterprises, namely solid sample 1 of one enterprise and solid sample 2 of another enterprise, and solid sample 1 and solid sample 2 of the two enterprises to take six 200g cyanide tailings respectively , carry out parallel tests according to the above method, and calculate the standard deviation and relative standard deviation. The results are shown in Table 1:

[0045] Table 1 Accuracy test data of this method

[0046]

[0047] It can be seen from the results in Table 1 that the relative standard deviations for the determination of easily released cyanide in this method are 4.09% and 5.32%, and the relative standard deviations for the determination of total cyanide are 4.18% and 5.50%.

Embodiment 2

[0049] Take the cyanide tailings of three different gold production enterprises, namely solid sample 1 of one enterprise, solid sample 2 of one enterprise and solid sample 3 of another enterprise, solid sample 1, solid sample 2 and solid sample 3 of three enterprises respectively. Take 6 parts of 200g cyanide tailings, each part of 200g cyanide tailings are divided into two parts, one part is tested according to the requirements of this method, and the other part is added with easy-to-release cyanide standard solution and then carried out according to this method. Determination, and calculate the recovery rate of standard addition;

[0050] Take the cyanide tailings of three different gold production enterprises, namely solid sample 1 of one enterprise, solid sample 2 of one enterprise and solid sample 3 of another enterprise, solid sample 1, solid sample 2 and solid sample 3 of three enterprises respectively. Take 6 parts of 200g cyanide tailings, each 200g cyanide tailings a...

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Abstract

The invention belongs to the technical field of substance detection methods, particularly relates to a method for measuring cyanide in cyanidation tailings, and is a method for measuring cyanide in cyanide-containing tailings, wherein the method is simple, reasonable and efficient in measurement process. The method comprises the following steps: starting from a principle of destructing dissolutionequilibrium; adding a strong alkali agent; dissolving cyanide in a precipitated state in a strong alkali solution; and obtaining a content of cyanide in the cyanidation tailings by measuring a concentration of cyanide in washing liquid and the content of cyanide in the tailings remaining after washing.

Description

technical field [0001] The invention belongs to the technical field of substance detection methods, and in particular relates to a method for determining cyanide in cyanide tailings. Background technique [0002] Due to the use of cyanidation gold extraction process in the production process of gold mines, a large amount of cyanide tailings will be produced. This part of cyanide tailings not only contains a large amount of easily released cyanide, but also contains a large amount of metal cyanide complexes. The existing solid cyanide determination methods include "Spectrophotometric Method for Determination of Soil Cyanide and Total Cyanide" (HJ745-2015), while the content of cyanide and heavy metals in the cyanide tailings of the gold ore industry is relatively high. For ordinary soil, the content is much higher. If the Spectrophotometric Method for Determination of Soil Cyanide and Total Cyanide (HJ745-2015) is used to monitor the cyanide content in the cyanide tailings of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01N1/34
CPCG01N1/34G01N33/00
Inventor 叶锦娟兰馨辉
Owner CHANGCHUN GOLD RES INST
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