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Method for measuring cyanide in cyanidation tailing slurry

A determination method and cyanide technology, applied in the field of monitoring, can solve the problems of large measurement error, unsuitable soil measurement method, and many interference factors.

Inactive Publication Date: 2018-06-22
CHANGCHUN GOLD RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the determination method of cyanide in water is used to measure the pulp, the content in the solid phase is difficult to be measured, and the content of cyanide and its heavy metals in cyanide tailings is very high compared to ordinary soil Yes, if only the determination method of cyanide in soil is used to measure the ore pulp, there are many interference factors and the measurement error is large. In addition, the ore pulp is a mixture of water and slag, and the soil determination method is even more inapplicable

Method used

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  • Method for measuring cyanide in cyanidation tailing slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take the cyanide tailings slurry of two different gold production enterprises, that is, the pulp sample 1 of one company and the pulp sample 2 of another company, and the pulp sample 1 and the pulp sample 2 of the two companies respectively take six 200mL cyanide tailings pulp , according to the above method for parallel testing, and calculate the standard deviation and relative standard deviation, the results are shown in Table 1:

[0032] Table 1 The accuracy test data of this method

[0033]

[0034] As can be seen from the test results in Table 1, the relative standard deviations of the easy-release cyanide determination of this method are 4.15% and 4.44%, and the relative standard deviations of the total cyanide determination are 5.21% and 3.43%.

Embodiment 2

[0036] The cyanide tailings pulp of three different gold production enterprises was taken, that is, the pulp sample 1 of one company, the pulp sample 2 of one company, and the pulp sample 3 of another company, and the pulp sample 1, pulp sample 2 and pulp sample 3 of the three companies were respectively Take 6 parts of 400mL cyanide tailings slurry, and each part of 400mL cyanide tailings slurry is divided into two parts, one of which is tested according to the requirements of the above method, and the other part is added to the standard solution of easy-release cyanide and then carried out according to the above method Determination and calculation of standard addition recovery;

[0037] The cyanide tailings pulp of three different gold production enterprises was taken, that is, the pulp sample 1 of one company, the pulp sample 2 of one company, and the pulp sample 3 of another company, and the pulp sample 1, pulp sample 2 and pulp sample 3 of the three companies were respect...

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Abstract

The invention relates to a substance measurement method in the monitoring field, particularly to a method for measuring cyanide in cyanidation tailing slurry, and is a method for measuring a total amount of cyanide in cyanide-containing tailing slurry, wherein the method is simple, reasonable and efficient in measurement process. The method comprises the following steps: starting from a principleof solid-liquid separation and destruction of dissolution equilibrium; firstly, performing solid-liquid separation on the tailing slurry; then washing a solid phase with a strong alkali agent; dissolving high-concentration cyanide in the solid phase in a strong alkali solution; and obtaining the total amount of cyanide in the cyanidation tailing slurry by measuring a total concentration of cyanidein a liquid phase and washing liquid and a content of cyanide in tailings remaining after washing.

Description

technical field [0001] The invention relates to a method for measuring substances in the monitoring field, in particular to a method for measuring cyanide in cyanide tailings slurry. Background technique [0002] Due to the use of cyanide gold extraction process in the production process of gold mines, a large amount of cyanide pulp will be produced. This part of the cyanide pulp not only contains a large amount of easy-to-release cyanide, but also contains a large amount of metal cyanide complexes. The existence of cyanide The harm is huge, and the accurate determination of the content of cyanide is the first step to do a good job in environmental protection and safety precautions. At present, the methods for the determination of cyanide include "Determination of Volumetric and Spectrophotometric Method for Water Cyanide" (HJ484) and "Spectrophotometric Method for Determination of Soil Cyanide and Total Cyanide" (HJ745-2015), of which HJ484 is for The determination of cyan...

Claims

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Application Information

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IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 叶锦娟兰馨辉
Owner CHANGCHUN GOLD RES INST
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