Method for measuring copper content in high-lead-gold concentrates

A method of determination and technology of copper content, which is applied in the direction of chemical analysis by titration, measurement device, preparation of test samples, etc., can solve problems such as unstable measurement results and clogged instruments, and achieve improved stability and accuracy , good applicability effect

Inactive Publication Date: 2018-07-20
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a method for measuring the copper content in high-lead gold concentrates to solve the problem that when the lead content is too high, there will be a large amount of lead chloride precipitated in the solution during the atomic absorption measurement, and the interference of the lead matrix is ​​added. , if the main lead element is not separated, it will cause problems such as clogging the instrument and unstable measurement results.

Method used

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  • Method for measuring copper content in high-lead-gold concentrates
  • Method for measuring copper content in high-lead-gold concentrates
  • Method for measuring copper content in high-lead-gold concentrates

Examples

Experimental program
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Effect test

Embodiment 1

[0069] Include the following steps:

[0070] (1) Weigh 0.3g sample, the mass is m 0 , accurate to 0.0001g, put the sample in a 400mL beaker, moisten it with a small amount of water, add 0.5g of ammonium fluoride, add 20mL of saturated solution of nitric acid-potassium chlorate, cover the watch glass, after heating and dissolving completely, take it off and cool;

[0071] (2) Add 10mL of sulfuric acid, continue to heat until there is thick smoke for 2 minutes, remove and cool;

[0072] (3) Rinse the watch glass and cup wall with water, add water to 100mL, boil slightly for 10min, remove, cool to room temperature, add 5mL of absolute ethanol, and let stand for 1h;

[0073] (4) Filter with slow quantitative filter paper, take the filtrate in a 400mL beaker, wash the beaker once with lotion, precipitate 3 times, keep the filtrate, and discard the precipitate;

[0074] (5) Filtrate is placed on heating plate heating, exhausts to sulfuric acid smoke, takes off cooling, measures wi...

Embodiment 2

[0130] Include the following steps:

[0131] (1) Weigh 0.3g sample, the mass is m 0 , accurate to 0.0001g, put the sample in a 400mL beaker, moisten it with a small amount of water, add 0.5g of ammonium fluoride, add 20mL of saturated solution of nitric acid-potassium chlorate, cover the watch glass, after heating and dissolving completely, take it off and cool;

[0132] (2) Add 10mL of sulfuric acid, continue to heat until it emits thick smoke for 2.5min, remove and cool;

[0133] (3) Rinse the watch glass and cup wall with water, add water to 100mL, boil slightly for 10min, remove, cool to room temperature, add 5mL of absolute ethanol, and let stand for 1h;

[0134] (4) Filtrate with slow quantitative filter paper, take the filtrate into a 400mL beaker, wash the beaker 2 times with lotion, precipitate 3 times, retain the filtrate, and discard the precipitate;

[0135] (5) Filtrate is placed on heating plate heating, exhausts to sulfuric acid smoke, takes off cooling, measu...

Embodiment 3

[0145] Include the following steps:

[0146] (1) Weigh 0.3g sample, the mass is m 0 , accurate to 0.0001g, put the sample in a 400mL beaker, moisten it with a small amount of water, add 0.5g of ammonium fluoride, add 20mL of saturated solution of nitric acid-potassium chlorate, cover the watch glass, after heating and dissolving completely, take it off and cool;

[0147] (2) Add 10mL of sulfuric acid, continue to heat until it emits thick smoke for 3 minutes, then remove and cool;

[0148] (3) Rinse the watch glass and cup wall with water, add water to 100mL, boil slightly for 10min, remove, cool to room temperature, add 5mL of absolute ethanol, and let stand for 1h;

[0149] (4) Filtrate with slow quantitative filter paper, the filtrate is taken over by a 400mL beaker, wash the beaker 2 times with lotion, precipitate 4 times, retain the filtrate, and discard the precipitate;

[0150] (5) Filtrate is placed on heating plate heating, exhausts to sulfuric acid smoke, takes off...

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Abstract

The invention relates to a method for measuring the copper content in high-lead-gold concentrates, and belongs to a method for measuring the copper content in ores. According to the method, a nitric acid-potassium chlorate saturated solution is used for dissolving a test specimen; sulfuric acid is used for precipitating lead ions; after the filtering, filter liquid is distilled until sulfuric acidsmoke thoroughly disappears; materials with the copper content being less than 2 percent are leached by hydrochloric acid; AAS determination is performed; the materials with the copper content beinggreater than 2 percent are leached by distilled water; the iodometry titration determination is performed. The copper content determination range in the lead concretes is 0.050 to 25.00 percent; the determination accuracy is improved; the copper measurement stability of the high-lead gold concentrates is improved; the measurement range is expanded; good application performance is realized.

Description

technical field [0001] The invention relates to a method for measuring copper content in ores, and is particularly suitable for measuring copper content in high-lead gold concentrates. Background technique [0002] High-lead gold concentrate is one of the common minerals, which can be used to extract metallic lead, and the level of copper is the basis for classifying high-lead gold concentrate, so the determination of copper content is particularly important. For samples with high lead content, such as lead concentrate, the national standard uses the flame atomic absorption method to measure the copper content, and the measurement range is 0.5-3.5%, but the measurement solution often has a large amount of lead chloride precipitated out, which is very easy to block In recent years, with the increase of the complexity of ore samples, some ore samples with high lead content have a copper content greater than 3.5%. However, the traditional iodometric method has a high lead conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N1/28G01N31/16
CPCG01N1/28G01N21/3103G01N31/16
Inventor 张越陈永红
Owner CHANGCHUN GOLD RES INST
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