Determining method for lead contents in gold concentrate and lead concentrate

A method of determination, the technology of lead concentrate, applied in the determination of lead content in lead concentrate, and the field of gold concentrate, can solve the problems of complex composition methods, insufficient, inapplicable test result accuracy, etc., and achieve simple, convenient and efficient operation high effect

Inactive Publication Date: 2016-08-10
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 method for measuring lead content in gold concentrate and lead concentrate to solve the problems of inapplicab

Method used

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  • Determining method for lead contents in gold concentrate and lead concentrate
  • Determining method for lead contents in gold concentrate and lead concentrate
  • Determining method for lead contents in gold concentrate and lead concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Include the following steps:

[0043] (1) Weigh 0.3g of the sample to be tested, accurate to 0.0001g, place it in a 400mL beaker, add 15mL of nitric acid, add 2mL of bromine water dropwise, cover with a watch glass, and heat until the sample to be tested is decomposed;

[0044] (2) After taking off the beaker and cooling it for a while, add 10mL of concentrated sulfuric acid, heat until thick white smoke is emitted, then take off the beaker and cool;

[0045] (3) Add 5mL of water and 10mL of hydrobromic acid, heat until thick white smoke is emitted, cool, add 5mL of dilute sulfuric acid and 10mL of hydrobromic acid, heat again until thick white smoke is emitted, and cool;

[0046] (6) Wash the cup wall and watch glass with water, adjust the volume to 90mL, put it on the electric stove and heat it to boil, and keep boiling for 10min, then take it out and cool it to room temperature;

[0047] (7) Add 10mL of ethanol, and let the lead sulfate precipitate stand for 2h;

...

Embodiment 2

[0051] Include the following steps:

[0052] (1) Weigh 0.4g of the sample to be tested, accurate to 0.0001g, place it in a 400mL beaker, add 20mL of nitric acid, add 3mL of bromine water dropwise, cover with a watch glass, and heat until the sample to be tested is decomposed;

[0053] (2) After taking off the beaker and cooling it for a while, add 12mL of concentrated sulfuric acid, heat until thick white smoke is emitted, then take off the beaker and cool;

[0054] (3) Add 5mL of water and 13mL of hydrobromic acid, heat until thick white smoke is emitted, cool, add 5mL of dilute sulfuric acid and 13mL of hydrobromic acid, heat again until thick white smoke is emitted, and cool;

[0055] (8) Wash the cup wall and watch glass with water, and adjust the volume to 950mL, put it on the electric stove and heat it to boil, and keep boiling for 10 minutes, then take it out and cool it to room temperature;

[0056] (9) Add 10 mL of ethanol, and let the lead sulfate precipitate stand ...

Embodiment 3

[0060] Include the following steps:

[0061] (1) Weigh 0.5g of the sample to be tested, accurate to 0.0001g, place it in a 400mL beaker, add 25mL of nitric acid, add 3mL of bromine water dropwise, cover with a watch glass, and heat until the sample to be tested is decomposed;

[0062] (2) After taking off the beaker and cooling it for a while, add 15mL of concentrated sulfuric acid, heat until thick white smoke is emitted, then take off the beaker and cool;

[0063] (3) Add 5mL of water and 15mL of hydrobromic acid, heat until thick white smoke is emitted, cool, add 5mL of dilute sulfuric acid and 15mL of hydrobromic acid, heat again until thick white smoke is emitted, and cool;

[0064] (10) Wash the cup wall and watch glass with water, adjust the volume to 100mL, put it on the electric stove and heat it to boil, and keep boiling for 10 minutes, then take it out and cool it to room temperature;

[0065] (11) Add 10mL of ethanol, and let the lead sulfate precipitate stand for...

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Abstract

The invention relates to a determining method for lead contents in gold concentrate and lead concentrate and belongs to a determining method for lead contents in ore and concentrate. The determining method comprises the following steps of using nitric acid, bromine water and sulfuric acid to digest a sample, and using hydrobromic acid and dilute sulphuric acid to treat for removing the interference of elements such as arsenic, antimony, selenium and tin in the sample to lead determination; then adopting sulphuric acid and lead to form lead sulfate precipitation, and filtering and separating out other interference elements; transferring the precipitation and filter paper to an acetic acid-sodium acetate buffer solution, enabling a mixture to generate lead acetate and dissolving in the buffer solution; taking xylenol orange as an indicator, and using a Na2EDTA standard titration solution for titrating. The accuracy, the precision and the reproducibility of the method disclosed by the invention can completely reach the determination requirement of the lead contents; meanwhile, the method has the advantages of simplicity and convenience in operation and high efficiency, and has important significance for quality monitoring, metal balance and trade pricing.

Description

technical field [0001] The invention relates to a method for determining the lead content in ores and concentrates, in particular to a method for determining the lead content in gold concentrates and lead concentrates. Background technique [0002] In recent years, with the continuous development of non-ferrous metal production technology, the requirements for the detection of lead content in non-ferrous metals are also getting higher and higher. During the daily determination of lead content in gold concentrates and lead concentrates, it is often necessary to base the sample properties, The difference in the level of content, to specifically choose to use the method of gold concentrate or lead concentrate to measure the sample, when the properties of the sample and the lead content are not clear, it will bring us trouble in the selection of the determination method, resulting in repeated determination, Time-consuming and labor-intensive, if the test method is not applicable...

Claims

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Application Information

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IPC IPC(8): G01N31/16
CPCG01N31/16
Inventor 洪博张灵芝穆岩赵亚明苏广东
Owner CHANGCHUN GOLD RES INST
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