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Blending method for enriching gold and silver in cupel through fire assaying

A technology of fire test gold and gray dish, which is applied in the field of analytical chemistry, can solve the problems of low accuracy of high-grade samples, achieve the effect of solving the limitation of weighing weight, improving the capture rate and saving the detection cost

Inactive Publication Date: 2017-12-22
山东黄金冶炼有限公司
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AI Technical Summary

Problems solved by technology

The main steps of the method are: adopt the fire test gold method to enrich the noble metal composite particles, and use an inductively coupled plasma emission spectrometer to measure the contents of gold, silver and palladium in the crude copper in the thiourea hydrochloride medium after being dissolved in aqua regia. The disadvantage is: the method is only applicable to samples with low content, the detection accuracy of high-grade samples is low, and it is basically not suitable for the detection of gold and silver in gold mud

Method used

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  • Blending method for enriching gold and silver in cupel through fire assaying
  • Blending method for enriching gold and silver in cupel through fire assaying
  • Blending method for enriching gold and silver in cupel through fire assaying

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Determination of gold and silver blank values ​​in reagents according to GB / T 7739.1-2007.

[0042] Weigh 20g of gold concentrate sample, wrap it with 7g of lead skin, put it into the ash dish preheated in the furnace at 950°C for 20 minutes, close the furnace door for 2 minutes, open the furnace door slightly, quickly cover the ash dish with 15g of lead cap, and close the furnace Open the door for 3 minutes, after the molten lead is demoulded, half open the furnace door, and control the furnace temperature at 850°C, close the furnace door when the dazzling color phenomenon occurs, raise the temperature to 880°C, blow out all the lead, and move the ash dish to the furnace door , put it aside for 1min, take it out and cool it down, and get the gold-silver pellets, and at the same time, break the ash dish for later use;

[0043] Put 35g of sodium carbonate, 25g of borax, 70g of glass powder, 55g of lead oxide, 3.5g of flour and the broken ash dish into the test gold cruci...

Embodiment 2

[0056] Determination of gold and silver blank values ​​in reagents according to GB / T 7739.1-2007.

[0057] Weigh 500.00 mg of gold mud sample, wrap it with 10 g of lead skin, put it into the ash dish preheated in the furnace at 950 ° C for 20 minutes, close the furnace door for 2 minutes, open the furnace door slightly, quickly cover the ash dish with 20 g of lead cap, and close the furnace door 5min, after the molten lead is removed from the mold, half open the furnace door, and control the furnace temperature at 930°C, close the furnace door when the phenomenon of dazzling color occurs, raise the temperature to 950°C, keep it warm for 5min, close it to blow out all the lead, and move the ash dish To the furnace door, place for 1min, take it out and cool it down, get the gold and silver granules, and at the same time, break the ash dish for later use;

[0058] Put 30g of sodium carbonate, 25g of borax, 70g of glass powder, 50g of lead oxide, 4.5g of flour and the broken ash d...

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Abstract

The invention relates to a blending method for enriching gold and silver in a cupel through fire assaying. The method comprises steps as follows: the cupel after sample cupellation is subjected to fire assaying blending research, the adding quantities of sodium carbonate, borax, glass powder, lead oxide and flour are determined, residual gold and silver in the cupel are enriched, gold and silver combined particles are obtained through cupellation and treated together with gold and silver combined particles obtained through direct cupellation and weighed, the combined particles are subjected to sheet grinding and parting and are weighed, and content of gold and silver in a sample is obtained. With the application of the method, the blending bottleneck problem that residual gold and silver in the cupel are difficult to enrich is solved, accuracy of a detection result is guaranteed, an operating process is simplified, and working efficiency is effectively improved.

Description

technical field [0001] The invention relates to a compounding method for residual gold and silver in a fire test gold enrichment ash dish, and belongs to the technical field of analytical chemistry. Background technique [0002] According to the prior art, the detection of gold ore and gold concentrate adopts GB / T 20899 and GB / T 7739 standards to carry out two test gold; for the detection of gold and silver content in gold mud, because the components of heteroelements in gold mud are complex At present, there is no unified industry standard, and there are no technical standards and analysis method standards for gold mud in foreign countries. The existing inspection method also adopts the classic fire test gold weight method. According to the composition of the sample, batching is carried out in a clay crucible, put into a high-power silicon carbon rod furnace for melting to form a lead buckle and ash blowing; the slag is collected for secondary batching melting to form a le...

Claims

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Application Information

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IPC IPC(8): G01N5/04G01N1/28G01N1/44
CPCG01N5/04G01N1/286G01N1/44
Inventor 朱宗波刘旭坤单召勇周发军殷晓斌杨海江
Owner 山东黄金冶炼有限公司
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