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A rapid determination method for total cyanide in cyanide-containing pulp

A rapid determination, cyanide technology, applied in material analysis, measurement device, preparation of test samples by observing the influence of chemical indicators, can solve the problem of no cyanide determination, and achieve convenient operation and short time. , the effect of improving efficiency

Active Publication Date: 2019-12-03
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a rapid determination method of total cyanide in cyanide-containing pulp to solve the problem that there is no measurement of cyanide in pulp at present

Method used

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  • A rapid determination method for total cyanide in cyanide-containing pulp
  • A rapid determination method for total cyanide in cyanide-containing pulp
  • A rapid determination method for total cyanide in cyanide-containing pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Include the following steps:

[0052](1) Use a graduated cylinder to measure a volume V of 200mL ore pulp sample, move it into a distillation flask and add a few glass beads, add 10mL of methanol to the bottle, shake the distillation flask for 2min to mix the sample evenly, add 10mL of CuSO 4 solution and 5mL sodium metabisulfite, shake well, then add 5mL AgNO 3 and 5mL (CH 3 COO) 2 Pb·3H 2 O solution, shake well, connect the distillation device, add 10mL sodium hydroxide solution into the receiving bottle as the absorption liquid, connect the outlet of the condenser tube at the upper end of the distillate conduit, insert the lower end into the absorption liquid of the receiving bottle, check the connection position, Make it tight. When distilling, the lower end of the distillate conduit should be inserted under the liquid surface of the absorption liquid to make the absorption complete;

[0053] (2) Add 15mL of ethylenediaminetetraacetic acid disodium salt EDTA-2Na...

Embodiment 2

[0095] Include the following steps:

[0096] (1) Use a graduated cylinder to measure a volume V of 200mL ore slurry sample, transfer it into a distillation flask and add a few glass beads, add 12.5mL of methanol to the bottle, shake the distillation flask for 2.5min to mix the sample evenly, add 12.5mL of CuSO 4 solution and 7.5mL sodium metabisulfite, shake well, then add 7.5mL AgNO 3 and 7.5mL (CH 3 COO) 2 Pb·3H 2 O solution, shake well, connect the distillation device, add 12.5mL sodium hydroxide solution into the receiving bottle as the absorption liquid, connect the outlet of the condenser tube at the upper end of the distillate conduit, insert the lower end into the absorption liquid of the receiving bottle, and check the connection position , to make it tight, when distilling, the lower end of the distillate conduit should be inserted under the liquid surface of the absorbing liquid to make the absorption complete;

[0097] (2) Add 17.5mL of ethylenediaminetetraacet...

Embodiment 3

[0139] Include the following steps:

[0140] (1) Use a graduated cylinder to measure a volume V of 200mL ore pulp sample, transfer it into a distillation flask and add a few glass beads, add 15mL of methanol to the bottle, shake the distillation flask for 3min to mix the sample evenly, add 15mL of CuSO 4 solution and 10mL sodium metabisulfite, shake well, then add 10mL AgNO 3 and 10mL (CH 3 COO) 2 Pb·3H 2 O solution, shake well, connect the distillation device, add 15mL sodium hydroxide solution into the receiving bottle as the absorption liquid, connect the outlet of the condenser tube at the upper end of the distillate conduit, insert the lower end into the absorption liquid of the receiving bottle, check the connection position, Make it tight. When distilling, the lower end of the distillate conduit should be inserted under the liquid surface of the absorption liquid to make the absorption complete;

[0141] (2) Add 20mL ethylenediaminetetraacetic acid disodium salt sol...

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Abstract

The invention relates to a method for rapidly determining total cyanides in cyanide-containing ore pulp, belonging to methods for rapidly determining the total cyanides in the cyanide-containing ore pulp in a cyanidation technology of the gold industry. The method comprises the steps of pretreating ore pulp by using methyl alcohol, shaking well, then adding a copper sulfate solution and a sodium metabisulfite solution, adding a right amount of silver nitrate solution and lead acetate solution, adding ethylene diamine tetraacetic acid (EDTA) and a phosphoric acid solution, distilling in a distillation flask, flushing a distillate guide tube with a small amount of water, taking out a receiving flask, diluting distillate to a marked line with water, and determining the distillate by using a silver nitrate titration method or an isonicotinic acid-pyrazolone spectrophotometric method. The method has the advnatazges that a gap in the determination of the total cyanides in the ore pulp is filled; copper sulfate and sodium metabisulfite are selected as masking agents, so that the interference of thiocyanides and sulphides can be eliminated, and the monitoring for cyanides in a gold carbonitriding and leaching technology is accurately guided; used time is short, filtration is not needed, the influence of the ore pulp on adsorption of the cyanides is avoided, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a method for measuring total cyanide in cyanide-containing pulp in the cyanidation process of the gold industry. Background technique [0002] In the gold production process, the cyanide gold leaching process is one of the very important means, and in the cyanide gold leaching process, the detection of cyanide in the pulp is very important, and the concentration of cyanide directly affects the gold leaching effect. The current cyanide determination in the national standard and the Ministry of Environmental Protection standard is the determination of cyanide in water quality, such as HJ484-2009 "Determination of Cyanide in Water Quality by Volumetric Method and Spectrophotometric Method", and there is an unpublished request for the determination of cyanide in solid waste In the opinion draft, the determination of cyanide in solid waste needs to prepare leachate, and then measure the leachate again, but the leaching time is very ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/79G01N21/31G01N1/28
CPCG01N1/28G01N21/3103G01N21/79
Inventor 葛仲义陈永红孟宪伟王菊张灵芝杨凤萍姜莹
Owner CHANGCHUN GOLD RES INST
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