CN106706460A - Analysis method of gold in gold saltcyanide - Google Patents
Analysis method of gold in gold saltcyanide Download PDFInfo
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- CN106706460A CN106706460A CN201710107624.7A CN201710107624A CN106706460A CN 106706460 A CN106706460 A CN 106706460A CN 201710107624 A CN201710107624 A CN 201710107624A CN 106706460 A CN106706460 A CN 106706460A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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Abstract
The invention relates to an analysis method of gold in gold saltcyanide. The method comprises the following steps of (1) preparing a fluxing agent: uniformly mixing anhydrous sodium carbonate, borax anhydrous, silicon dioxide and lead oxide according to the proportion; (2) weighing a specimen and flour, uniformly mixing with the fluxing agent, coating a layer of sodium chloride thereon; (3) placing a container in a high temperature furnace, and smelting under the condition of high temperature; (4) melting smelted alloy at high temperature, and carrying out cupellationon lead so as to separate gold; (5) washing and drying the separated gold; (6) weighing the weight of the gold, and calculating a result. The method provided by the invention can be used for directly separating and enriching the gold from/in the gold saltcyanide, and is high in applicability, simple to operate, rapid in method, accurate in result, and free of pollution and interference. The method is suitable for determining the gold in a gold saltcyanide sample.
Description
Technical field
The present invention relates to a kind of analysis method of gold, the analysis method of gold in more particularly to a kind of gold salt cyanide.
Technical background
Gold potassium cyanide（KAu(CN)2）With potassium auricyanide（KAu(CN)4·H2O）Important industrial chemicals is, white is brilliant
Body, is commonly applied to electroplating industry, it may also be used for pharmaceuticals industry and as fields such as analytical reagents, is produced in many precision instruments
Equally played an important role in journey.Gold potassium cyanide is extremely toxic substance with potassium auricyanide, and its purity directly affects product
How quality and its practical application, carry out that quality testing is significant to gold potassium cyanide and potassium auricyanide, wherein gold
Content is an important indicator of its quality, and there is presently no the examination criteria of gold in related gold salt cyanide, general use adds
Enriching sulfuric acid, heats decomposition of smoldering and obtains cake of gold, gravimetric detemination gold content, but produce cyaniding in the method process of the test
Thing pollutes, while the metal ion such as calcium in sample, barium, lead and sulfate radical generation precipitation produce interference in being mixed into cake of gold.
The content of the invention
Interference it is an object of the invention to overcome various impurity, eliminates cyanide pollution, there is provided one kind passes through metallurgy side
Gold in method separation and concentration gold salt cyanide, the golden rapid analysis method in gravimetric detemination gold salt cyanide.
Concrete operation step of the invention is as follows：
Step one：Configuration flux：Natrium carbonicum calcinatum, borax anhydrous, silica and lead oxide are proportionally well mixed；
Step 2：Weigh test portion and flour is well mixed with flux, one layer of sodium chloride is being covered above；
Step 3：Container is placed in high temperature furnace, is smelted under the high temperature conditions；
Step 4：Alloy obtained by smelting carries out ash and blows lead and isolate gold by high temperature melting；
Step 5：Separating obtained goldc grains is by washing and dries；
Step 6：Weigh the weight and result of calculation of gold.
The flux ratio：Natrium carbonicum calcinatum:Borax anhydrous:Silica:Lead oxide=1 ~ 2:0.25~0.5:0.5~1:3
~6。
The weight for weighing test portion is 0.1 ~ 1.0g, and flux weight is 60 ~ 150g, and flour weight is 2 ~ 3g.
The smelting temperature is 1100 ~ 1300 DEG C, 30 ~ 50min of the duration of heat.
The grey blowing temp is 900 ~ 1000 DEG C.
Technical scheme by the state of high-temperature fusion, the natrium carbonicum calcinatum of alkalescence, lead oxide and sample
In metal ion with acidity silica, borax anhydrous reaction, partial oxidation lead is by flour Reducing Lead, Gold Samples ion
Gold is reduced into, because gold has very strong affinity to molten lead, so gold is enriched in molten lead, cyaniding root pyrolytic disappears
Except cyaniding pollution.Impurity element becomes slag, is separated from each other due to lead and slag density variation, eliminates impurity interference.Reaction
Principle：KAu(CN)2+SiO2+ flour（C6H10O5)→K2SiO3+Au+CO2+H2O+NO2, lead blows isolated pure by high temperature ash
Goldc grains, so as to complete gravimetric detemination gold content.
By condition test, the ratio of the ratio, flux and test portion of each reagent in optimization flux, pyrometallurgy divides the present invention
Gold in enrichment gold salt cyanide, overcomes impurity to disturb, and eliminates cyanide pollution, obtains proof gold grain, and the method is simple and quick
Accurately.
Specific embodiment
The present invention is further elaborated with reference to embodiment.The sample of embodiment is respectively gold potassium cyanide and cyaniding
Golden potassium.Precision test, recovery test and goldc grains purity test are carried out respectively to two samples according to technical scheme.
Embodiment 1：100g natrium carbonicum calcinatums, 25g borax anhydrous, 50g silica, 300g lead oxide are weighed, mixing is equal
It is even；0.1g gold potassium cyanides, 2.0g flour and 60g flux are weighed, is fitted into container and is well mixed, one layer of chlorination is covered above
Sodium；Container is placed in high temperature furnace and smelts 30min under the conditions of 1100 DEG C；Smelt the metal for is carried out under the conditions of 900 DEG C
Ash blows separation, and lead ash is blown clean as terminal；Ash blows the goldc grains for obtaining and heats washing by 5% dilute nitric acid solution and dry；Claim
Take the weight of gold and calculate golden result.Such parallel test 7 times, measurement result is as shown in table 1 below.
Embodiment 2：200g natrium carbonicum calcinatums, 50g borax anhydrous, 100g silica, 600g lead oxide are weighed, mixing is equal
It is even；1.0g potassium auricyanides, 3.0g flour and 150g flux are weighed, is fitted into container and is well mixed, one layer of chlorination is covered above
Sodium；Container is placed in high temperature furnace and smelts 50min under the conditions of 1300 DEG C；Smelt the alloy for carries out ash under the conditions of 1000 DEG C
Separation is blown, lead ash is blown clean as terminal；Ash blows the goldc grains for obtaining and heats washing by 5% dilute nitric acid solution and dry；Weigh
Goldc grains weight simultaneously calculates golden result.Such parallel test 7 times, measurement result is as shown in table 1 below.
The embodiment measurement result of table 1
| Embodiment | Measurement result/% | Average value/% | Relative standard deviation/% |
| 1 | 68.15,68.10,68.20,68.18,68.07,68.23,68.09 | 68.15 | 0.09 |
| 2 | 57.55,57.68,57.60,57.50,57.66,57.60,57.50 | 57.58 | 0.12 |
Recovery test：The sample of embodiment 1 and 2 is weighed respectively, then weighs proof gold respectively in two samples of embodiment 1 and 2 with honest material
In product, operated according to the identical embodiment of embodiment 1 and 2, the rate of recovery is calculated according to test data.Recovery test result such as following table
Shown in 2.
The recovery test of table 2
Purity test：According to standard GB/T/T 11066.1-2008（The measure of golden chemical analysis method gold amount）Determine wherein
Gold content in goldc grains, the content of gold is more than 99.95%.
As can be seen from Table 1, precision test（n=7）In relative standard deviation be less than 0.15%, measurement result is steady
It is fixed；As can be seen from Table 2, the rate of recovery is more than 99.0%, and enrichment is complete, as a result accurately；Can more than 99.95% from goldc grains purity
To find out, complete, method reliability is separated.
Above example is used for illustrative purposes only, rather than limitation of the present invention, about the technology people of technical field
Member, without departing from the present invention, can also make various conversion or modification, therefore all equivalent technical schemes
Also scope of the invention should be belonged to, should be limited by each claim.
Claims (5)
1. in a kind of gold salt cyanide gold analysis method, it is characterised in that methods described comprises the following steps：
Step one：Configuration flux：Natrium carbonicum calcinatum, borax anhydrous, silica and lead oxide are proportionally well mixed；
Step 2：Weigh test portion and flour is well mixed with flux, one layer of sodium chloride is being covered above；
Step 3：Container is placed in high temperature furnace, is smelted under the high temperature conditions；
Step 4：Alloy obtained by smelting carries out ash and blows lead and isolate gold by high temperature melting；
Step 5：Separating obtained goldc grains is by washing and dries；
Step 6：Weigh the weight and result of calculation of gold.
2. in gold salt cyanide according to claim 1 gold analysis method, it is characterised in that the flux ratio：Nothing
Aqueous sodium carbonate:Borax anhydrous:Silica:Lead oxide=1 ~ 2:0.25~0.5:0.5~1:3~6.
3. in gold salt cyanide according to claim 1 gold analysis method, it is characterised in that the weight for weighing test portion
It is 0.1 ~ 1.0g to measure, and flux weight is 60 ~ 150g, and flour weight is 2 ~ 3g.
4. in gold salt cyanide according to claim 1 gold analysis method, it is characterised in that the smelting temperature is
1100 ~ 1300 DEG C, duration of heat 30min ~ 50min.
5. in gold salt cyanide according to claim 1 gold analysis method, it is characterised in that the grey blowing temp is
900~1000℃。
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| CN201710107624.7A CN106706460A (en) | 2017-02-27 | 2017-02-27 | Analysis method of gold in gold saltcyanide |
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| CN201710107624.7A CN106706460A (en) | 2017-02-27 | 2017-02-27 | Analysis method of gold in gold saltcyanide |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813835A (en) * | 2017-11-22 | 2019-05-28 | 中国瑞林工程技术股份有限公司 | The method for measuring gold and silver content in useless circuit board |
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| CN1475788A (en) * | 2003-07-15 | 2004-02-18 | 水口山矿务局柏坊铜矿 | Method of analyzing gold, silver content in gold, silver containing material |
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| CN106092934A (en) * | 2016-07-13 | 2016-11-09 | 东江环保股份有限公司 | The assay method of the bullion content in solid waste |
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2017
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| CN103575615A (en) * | 2013-11-07 | 2014-02-12 | 广州有色金属研究院 | Measuring method of silver content in tin-containing material |
| CN103575609B (en) * | 2013-11-07 | 2015-07-01 | 广州有色金属研究院 | Method for analyzing gold in liquid gold water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109813835A (en) * | 2017-11-22 | 2019-05-28 | 中国瑞林工程技术股份有限公司 | The method for measuring gold and silver content in useless circuit board |
| CN109813835B (en) * | 2017-11-22 | 2021-10-26 | 中国瑞林工程技术股份有限公司 | Method for measuring gold and silver content in waste circuit board |
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Application publication date: 20170524 |