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Method for simply and efficiently determining content of lead in gold concentrate

A lead content, gold concentrate technology, applied in measuring devices, color/spectral property measurement, chemical analysis by titration, etc. The effect of experiment efficiency and improving accuracy

Inactive Publication Date: 2017-12-26
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the above problems, the present invention provides a simple and efficient method for determining the lead content in gold concentrate, which adopts a simple and effective method of dissolving samples, which solves the problem of inaccurate results caused by the loss of lead

Method used

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  • Method for simply and efficiently determining content of lead in gold concentrate
  • Method for simply and efficiently determining content of lead in gold concentrate
  • Method for simply and efficiently determining content of lead in gold concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] (1) Weigh 0.27g of the ore sample to be tested, put it in a 400mL beaker, add water to moisten it, add 0.5g of ammonium fluoride, add 20mL of saturated nitric acid-potassium chlorate solution, cover with a watch glass, and heat it on an electric furnace until NO 2 The smoke was exhausted, and the sample was completely digested.

[0068] (2) Take off the beaker and cool to room temperature, add 10mL concentrated H 2 SO 4 , put it on the electric furnace to heat, steam until thick white smoke is emitted for 5 minutes, remove the beaker and cool to room temperature, add 100mL of water, put it on the electric stove, heat to boiling, and boil slightly for 10 minutes;

[0069] (3) Remove the beaker, let it cool slightly, add 5mL of absolute ethanol, and let stand for 60min;

[0070] (4) Use double-layer slow quantitative filter paper to filter, use sulfuric acid lotion (2+98) to wash the precipitate, and drop the washing solution on the quantitative filter paper stained wit...

Embodiment 2

[0090] (1) Weigh 0.30g of sample, put it in a 400mL beaker, add water to moisten it, add 0.5g of ammonium fluoride, add 20mL of saturated nitric acid-potassium chlorate solution, cover with a watch glass, and heat it on an electric furnace to NO 2 The smoke was exhausted, and the sample was completely digested.

[0091] (2) Take off the beaker and cool to room temperature, add 10mL concentrated H 2 SO 4 , put it on the electric furnace to heat, steam until thick white smoke is emitted for 5 minutes, remove the beaker and cool to room temperature, add 100mL of water, put it on the electric stove, heat to boiling, and boil slightly for 10 minutes;

[0092] (3) Remove the beaker, let it cool slightly, add 5mL of absolute ethanol, and let stand for 60min;

[0093] (4) Use double-layer slow quantitative filter paper to filter, use sulfuric acid lotion (2+98) to wash the precipitate, and drop the washing solution on the quantitative filter paper stained with potassium thiocyanate ...

Embodiment 3

[0113] (1) Weigh 0.28g of the sample, put it into a 400mL beaker, add water to moisten it, add 0.5g of ammonium fluoride, add 20mL of saturated nitric acid-potassium chlorate solution, cover with a watch glass, and heat it on the electric furnace to NO 2 The smoke was exhausted, and the sample was completely digested.

[0114] (2) Take off the beaker and cool to room temperature, add 10mL concentrated H 2 SO 4 , put it on the electric furnace to heat, steam until thick white smoke is emitted for 5 minutes, remove the beaker and cool to room temperature, add 100mL of water, put it on the electric stove, heat to boiling, and boil slightly for 10 minutes;

[0115] (3) Remove the beaker, let it cool slightly, add 5mL of absolute ethanol, and let stand for 60min;

[0116] (4) Use double-layer slow quantitative filter paper to filter, use sulfuric acid lotion (2+98) to wash the precipitate, and drop the washing solution on the quantitative filter paper stained with potassium thioc...

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Abstract

The invention belongs to the technical field of a lead content determination method, and particularly relates to a method for simply and efficiently determining a content of lead in gold concentrate. The method comprises the following steps: dissolving a test sample by utilizing nitric acid-potassium chlorate solution, enabling lead in a sulfuric acid medium to form lead sulfate precipitates, filtering, dissolving the precipitates, i.e., lead sulfate on filter paper by using acetic acid-sodium acetate buffer solution, adopting an xylenol orange solution as an indicator under the condition that the PH value is 5.0 to 6.0, titrating by using a EDTA standard titration solution, and calculating the content of lead in the precipitates according to a volume of the consumed EDTA standard solution; collecting filtrate, and determining the content of the lead in the filtrate by virtue of atomic absorption; and finally summing the lead content in the filtrate and the lead content in the precipitates, thus obtaining the lead content in ores. By adopting the method, the problem that the result is inaccurate due to the loss of lead in the filtrate can be solved, the problem that an experimental method is difficult to select for an unknown sample can be solved, the experiment accuracy can be improved, the experimental procedures can be simplified, the operation is convenient, the mass operation of the sample can be realized, and the working efficiency can be improved.

Description

technical field [0001] The invention belongs to the technical field of methods for measuring lead content in gold concentrates, and in particular relates to a simple and efficient method for determining the lead content in gold concentrates. Background technique [0002] There is a method for the determination of lead content in gold concentrate in the national standard, but there are defects in the existing method for the determination of lead in gold concentrate, which ignores the loss of lead in the filtrate of gold concentrate after dissolution, resulting in low results. The higher the lead content in the medium, the more serious the lead loss, especially for the determination of the lead content in gold concentrates with a lead content greater than 50%, the loss of lead in the filtrate will lead to inaccurate results. Contents of the invention [0003] In order to overcome the above problems, the present invention provides a simple and efficient method for determining...

Claims

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Application Information

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IPC IPC(8): G01N31/16G01N21/31
CPCG01N21/3103G01N31/16
Inventor 姜莹陈永红孟宪伟杨凤萍葛仲义
Owner CHANGCHUN GOLD RES INST
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