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{0><}0{>Method for measuring contents of gold and silver in gold mud sample by virtue of fire assay

A technology of fire testing gold and medium gold content, which can solve the problems such as the difference in the properties of gold mud materials in the production process by removing certain components, weighing, investigating stages/state changes, etc.

Inactive Publication Date: 2016-09-21
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the domestic non-ferrous metal industry has formulated a method for the determination of gold and silver in copper and lead electrolytic anode slime, this method is not suitable for the analysis of gold slime materials, because there are significant differences in the production process and the properties of gold slime materials

Method used

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  • {0&gt;&lt;}0{&gt;Method for measuring contents of gold and silver in gold mud sample by virtue of fire assay
  • {0&gt;&lt;}0{&gt;Method for measuring contents of gold and silver in gold mud sample by virtue of fire assay
  • {0&gt;&lt;}0{&gt;Method for measuring contents of gold and silver in gold mud sample by virtue of fire assay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Include the following steps:

[0064] (1) Prediction of gold and silver content

[0065] Weigh 100mg of the sample, the mass is M, wrap 14g of lead foil, put it into the ash dish that has been preheated at 950°C for 30 minutes, carry out ash blowing at 880°C, after 30 minutes of ash blowing, take out the ash dish to cool, and then put Take it out and hammer it into thin slices, weigh and record its mass M 1 Add 1.5 times the amount of silver to observe the color of the combined grains, wrap 5 grams of lead foil and carry out ash blowing again, take out the ash dish to cool after the ash blowing ends; then take out the gold and silver combined grains and hammer them into thin slices, put them in a 25 ml colorimetric tube, add (1 +5) 10 ml of dilute nitric acid, boil in a water bath for 40 minutes, pour out the acid solution, then add 10 ml of 80°C (1+1) nitric acid, continue to boil in a water bath for 40 minutes, pour out the acid solution, and wash the gold particles ...

Embodiment 2

[0110] Include the following steps:

[0111] (1) Prediction of gold and silver content

[0112] Weigh 100 mg of the sample, the mass is M, wrap 15 grams of lead foil, put it into the ash dish that has been preheated at 980°C for 25 minutes, carry out ash blowing at 900°C, after 25 minutes of ash blowing, take out the ash dish to cool, and then put the gold and silver particles Take it out and hammer it into thin slices, weigh and record its mass M 1 Add 2.3 times the amount of silver to observe the color of the combined grains, wrap 6 grams of lead foil and carry out ash blowing again, take out the ash dish to cool after the ash blowing ends; then take out the gold and silver combined grains and hammer them into thin slices, put them in a 25 ml colorimetric tube, add (1 +5) 13 ml of dilute nitric acid, boil in a water bath for 35 minutes, pour out the acid solution, then add 13 ml of 90°C (1+1) nitric acid, continue to boil in a water bath for 35 minutes, pour out the acid so...

Embodiment 3

[0157] Include the following steps:

[0158] (1) Prediction of gold and silver content

[0159] Weigh 100 mg of the sample, the mass is M, wrap 16 grams of lead foil, put it into the ash dish that has been preheated at 1000°C for 20 minutes, carry out ash blowing at 920°C, after 20 minutes of ash blowing, take out the ash dish to cool, and then mix the gold and silver particles Take it out and hammer it into thin slices, weigh and record its mass M 1 Add 3.0 times the amount of silver to observe the color of the combined grains, wrap 7 grams of lead foil and carry out ash blowing again, take out the ash dish to cool after the ash blowing ends; then take out the gold and silver combined grains and hammer them into thin slices, put them in a 25 ml colorimetric tube, add (1 +5) 15 ml of dilute nitric acid, boil in a water bath for 30 minutes, pour out the acid solution, then add 15 ml of 100°C (1+1) nitric acid, continue to boil in a water bath for 30 minutes, pour out the acid ...

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Abstract

{0><}0{>The invention relates to a method for measuring contents of gold and silver in a gold mud sample by virtue of fire assay and belongs to a method for measuring a gold mud material by virtue of a fire assay method. <0}{0><}0{>The method comprises the following steps of: burdening and fusing a test sample so as to obtain a proper amount of lead buttons and fragile molten slag; recycling residual gold and silver in the molten slag; separating gold and silver from the lead buttons through cupelling, thereby obtaining gold and silver combination particles; processing and weighing the particles; grinding the gold and silver combination particles into slices; separating gold by use of nitric acid; and weighing, and calculating contents of gold and silver. <0}{0><}0{>The method is capable of improving the experiment accuracy and simplifying experimental procedures, is convenient to operate, and is capable of realizing batch operation for samples and effectively improving the working efficiency.

Description

technical field [0001] The invention belongs to a method for measuring gold mud materials by using a fire test gold method, and is suitable for measuring the gold and silver amounts of gold mud materials with different properties produced by different enterprises. Background technique [0002] Fire assay gold analysis is a classic and mature analysis method, which is mostly used at home and abroad to analyze the gold and silver content in gold-containing materials and products such as gold ore, gold concentrate, and alloyed gold. At present, my country has not formulated a national standard analysis method for gold mud, and there are no technical standards and analysis method standards for gold mud at home and abroad. Although the domestic non-ferrous metal industry has formulated a method for the determination of gold and silver in copper and lead electrolytic anode slime, this method is not suitable for the analysis of gold slime materials, because there are significant di...

Claims

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Application Information

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IPC IPC(8): G01N5/04G01N25/02
CPCG01N5/04G01N25/02
Inventor 腾飞马丽军李正旭肖千鹏张晶晶
Owner CHANGCHUN GOLD RES INST
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