CN105547897A - Method for jointly measuring content of gold and content of silver in cyanide gold mud - Google Patents
Method for jointly measuring content of gold and content of silver in cyanide gold mud Download PDFInfo
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- CN105547897A CN105547897A CN201610050358.4A CN201610050358A CN105547897A CN 105547897 A CN105547897 A CN 105547897A CN 201610050358 A CN201610050358 A CN 201610050358A CN 105547897 A CN105547897 A CN 105547897A
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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 a method for jointly measuring the content of gold and the content of silver in cyanide gold mud. According to the method, one time of ash blowing and one time of slagging conducted through fire assaying are conducted, so that all gold and silver combined particles in the gold mud are obtained, then according to the parting requirements, a certain amount of silver powder is added, parting is conducted in a nitric acid solution, the gold content is obtained, and finally, the accurate content of gold and the accurate content of silver in the gold mud are calculated through the sample weight, the combined particle weight and the gold weight. By means of the method, previous two times of fire assaying operation is simplified, work time is greatly shortened, material cost is saved, high accuracy is maintained, and the method is suitable for application and popularization.
Description
Technical field
The present invention relates to a kind of method of gold, silver content Simultaneously test under Fire Assaying condition in goldmud from cyanide processing.
Background technology
At present, in goldmud from cyanide processing, the content assaying method of gold, silver mainly adopts fire assaying, its key step obtains gold and silver by the prediction of gold, silver content in gold mud and twice Fire Assaying slag making operation to close grain, then in the gold and silver conjunction grain obtained, add a certain amount of silver powder ash to blow, the conjunction grain nitric acid parting will obtained again, thus calculate the content of gold, silver in gold mud.Said method needs twice Fire Assaying operation, and required flow process and time are all long, complicated operation, and waste of material is serious.
Gold magazine discloses the method for one " direct cupellation measures the Jin Heyin in gold mud ", referred to as " direct cupellation " in May, 1998 (fifth phase P52-53).There is following shortcoming in this method:
1, directly 20 grams of mix reagent sheet leads wrap up by cupellation, and its size is not enough to hold, in melting process with cupel
Can cupel be overflowed, cause noble metal to run off, make result inaccurate.
2, in goldmud from cyanide processing, impurity component is complicated, and content is higher, can not by simply once ash blow by impurity and precious metal separation complete.
Summary of the invention
Technical matters to be solved by this invention is, the simultaneous measuring method of gold, silver content in a kind of goldmud from cyanide processing is provided, replace twice Fire Assaying operation of prior art, utilize the fairly simple content that once ash blows, a Fire Assaying measures gold, silver in gold mud, and guarantee the accuracy of measurement result.
In order to solve this technical matters, present invention employs following technical scheme:
A simultaneous measuring method for gold, silver content in goldmud from cyanide processing, is characterized in that carrying out according to the following step:
The prediction of gold, silver grade in gold mud:
The first step: take two parts, gold mud sample respectively, be labeled as No. 1 sample and No. 2 samples, weight counts m respectively, n; No. 1 sample is directly with sheet lead parcel, and No. 2 samples add high-purity silver powder makes mixed gold, silver than being 1:3 ~ 1:6, then wraps up with sheet lead;
Second step: cupel is put into high temperature furnace 940 DEG C ~ 960 DEG C preheating 30 ~ 40min, then the sample of above-mentioned two parts of sheet leads parcel is put into cupel melting respectively, ash blows, and obtains No. 1 gold and silver and closes grain and No. 2 gold and silver conjunction grains;
3rd step: No. 1 gold and silver is closed grain glacial acetic acid and boils cleaning, dry, weighs close the heavy m of grain
1; No. 2 gold and silver are closed grain and grinds sheet, parting, weigh to obtain gold content m
2; Calculate the prediction grade of gold, silver in gold mud according to the following formula:
Au%=m
2/n×100%;Ag%=(m
1-m
1×m
2/n)/m×100%；
In gold mud, the exact level of gold, silver measures:
4th step: the weight m taking gold mud sample
3, wrap up with sheet lead;
5th step: cupel is put into high temperature furnace 940 DEG C ~ 960 DEG C preheating 30 ~ 40min, then by the 4th step sheet lead parcel cupel melting put into by sample, ash blows, obtain No. 3 gold and silver and close grains;
6th step: the cupel muller after being blown by the 5th step ash is pulverized, and is all transferred to by cupel powder and prepared in the Fire Assaying crucible of material, carries out Fire Assaying operation, obtains No. 4 little conjunction grains of gold and silver;
7th step: No. 3 gold and silver conjunction grains and No. 4 little conjunction grains of gold and silver are boiled with glacial acetic acid in the lump, cleaning, dry, Weighed product obtains m
4;
8th step: the gold mud prediction gold, silver grade calculated according to the 3rd step, a certain amount of high-purity silver powder is added in the 7th step products therefrom, gold, silver ratio is made to be 1:3, wrap up with sheet lead, then put into melting in the cupel of high temperature furnace 940 DEG C ~ 960 DEG C of preheating 30 ~ 40min, ash blows, obtain No. 5 gold and silver and close grains;
9th step: close grain hammer leaf by No. 5, grind sheet, be then rolled into rouleau, successively parting in 1+7 salpeter solution and 1+1 salpeter solution, each 30 ~ 40min, obtains golden volume; Then gold is provided in porcelain crucible; Roll up 3 times with distilled water cleaning gold, be then placed on electric hot plate by porcelain crucible and dry, anneal at 750 DEG C 2-3min in box-type high-temperature furnace, and take out cooling, weigh to obtain golden volume weight m
5;
Tenth step: the exact level calculating gold, silver in gold mud according to lower type: Au%=m
5/ m
3× 100%; Ag%=(m
4-m
5)/m
3× 100%.
Preferably, wherein the 4th step: according to the prediction grade of gold in the gold mud that the 3rd step calculates, take the weight m of gold mud sample
3, make Gold Samples content be m', wrap up with sheet lead; Wherein m'=150 ~ 250mg.
Good effect of the present invention is, utilizes once ash to blow, Fire Assaying replaces twice Fire Assaying operation in the past, determined the content of gold, silver in gold mud, and maintain the accuracy of result by fairly simple method.The complex operations simplifying twice Fire Assaying in the past of the inventive method, shortens the chemical examination time over half, simple to operately maintains again very high accuracy, and saved material cost, be suitable for applying.
Compared with the direct cupellation described in background technology, the present invention has following unique advantage:
1, the present invention once ash blow only with sheet lead melting trapping noble metal, the noble metal more than 90 ~ 93% is entered and closes in grain, and
And do not need in trapping process to add mix reagent, take into full account that cupel absorbs the ability of impurity element, melt liquid can not be caused excessive.
2, the noble metal that the present invention's Fire Assaying makes to remain on cupel and cupel absorbs through the comprehensive trapping of mix reagent, and
Reclaim, make noble metal enter into little conjunction grain.
3, this present invention is compared with direct cupellation, and the complexity composition both having considered goldmud from cyanide processing does not blow by simple ash
Carry out the separation problem of gold and silver and impurity element, in turn ensure that the problem of the high-recovery of gold, silver in goldmud from cyanide processing, ensure that the accuracy of gold, silver chemical examination in goldmud from cyanide processing.
4, in the inventive method, taking gold mud Gold Samples content m' is the empirical value obtained by great many of experiments.A large number of experiments show that, when in gold mud, gold content is 150 ~ 250mg, the gold mud weight taken effect of obtaining in once ash blows is best; And when gold content is 150 ~ 250mg, the effect of Fire Assaying trapping noble metal is better.
Embodiment
In order to understand better and implement the present invention, further illustrate the present invention below in conjunction with specific embodiment.
The prediction of gold, silver grade in gold mud:
The first step: take two parts, 200.00mg gold mud sample respectively, is labeled as No. 1 sample and No. 2 samples; No. 1 sample is directly with 10 grams of sheet lead parcels, and it is 400mg that No. 2 samples add high-purity silver powder, then with 10 grams of sheet lead parcels;
The amount that No. 2 samples add high-purity silver powder should guarantee mixed gold, silver than being 1:3 ~ 1:6; the gold mud Gold Samples taken, silver content are obtained by empirical estimating; the excessive mode adding high-purity silver powder of general employing; namely rule of thumb estimate that the gold mud Gold Samples content lower limit that obtains calculates the amount adding high-purity silver powder, and mixed gold, silver ratio is reached or more than 1:3.
Second step: cupel is put into box-type high-temperature furnace 950 DEG C of preheating 30min, then the sample of above-mentioned two parts of sheet leads parcel is put into cupel melting respectively, ash blows, and obtains No. 1 gold and silver and closes grain and No. 2 gold and silver conjunction grains;
3rd step: No. 1 gold and silver is closed grain glacial acetic acid and boils cleaning, dry, weighs close the heavy m of grain
1=95.65mg; No. 2 gold and silver are closed grains and grinds sheets, parting, gold is weighed to obtain gold content m
2=78.13mg; Calculate the prediction grade of gold, silver in gold mud according to the following formula: Au%=m
2/ n × 100%; Ag%=(m
1-m
1× m
2/ n)/m × 100%;
Au%=78.13/200.00×100%=39.06%;
Ag%=(95.65-95.65×78.13/200.00)/200.00×100%=29.15%
In gold mud, the exact level of gold, silver measures:
4th step: according to the prediction grade of gold in the gold mud that the 3rd step calculates, take the weight m of gold mud sample
3=512.03mg, makes Gold Samples content be 200mg, with 20 grams of sheet lead parcels;
5th step: cupel is put into box-type high-temperature furnace 950 DEG C of preheating 30min, then by the 4th step sheet lead parcel cupel melting put into by sample, ash blows, obtain No. 3 gold and silver and close grains;
6th step: the cupel muller after being blown by the 5th step ash is pulverized, and is all transferred to by cupel powder and prepared in the Fire Assaying crucible of material, carries out Fire Assaying operation, obtains No. 4 little conjunction grains of gold and silver;
7th step: No. 3 gold and silver conjunction grains and No. 4 little conjunction grains of gold and silver are boiled with glacial acetic acid in the lump, cleaning, dry, Weighed product obtains m
4=350.80mg;
8th step: the gold mud prediction gold, silver grade calculated according to the 3rd step, the high-purity silver powder of a certain amount of 453.72mg is added in the 7th step products therefrom, gold, silver ratio is made to be 1:3, with 10 grams of sheet lead parcels, then put into melting in the cupel of box-type high-temperature furnace 950 DEG C of preheating 30min, ash blows, obtain No. 5 gold and silver and close grains;
9th step: close grain hammer leaf by No. 5, grinds sheet, is then rolled into rouleau, successively parting in (1+7) salpeter solution and (1+1) salpeter solution, and each 30min, obtains golden volume; Then gold is provided in porcelain crucible; With distilled water cleaning gold volume, be then placed on electric hot plate by porcelain crucible and dry, 750 DEG C of annealing 2-3min in box-type high-temperature furnace, take out cooling, weigh to obtain golden volume weight m
5=201.13mg;
Tenth step: the exact level calculating gold, silver in gold mud according to lower type:
Au%=m
5/m
3×100%；Ag%=(m
4-m
5)/m
3×100%。
Au%=201.13/512.03×100%=39.28%；
Ag%=(350.80-201.13)/512.03×100%=29.23%
Adopt the method for the embodiment of the present invention, as the direct cupellation described in twice Fire Assaying method of prior art and background technology, gold and silver mensuration is carried out respectively for two batches of gold mud, and result of laboratory test is contrasted, result gathers as table 1(corresponds to the 2nd batch that tests lot number).Get another batch of gold mud to carry out repeating to test (experimentation is omitted), also result of laboratory test contrasted, result gathers as table 1(corresponds to the 1st batch that tests lot number).
Table 1 measurement result compares
As seen from Table 1, with twice Fire Assaying method of prior art for standard, the inventive method result of laboratory test is accurately, and accuracy is apparently higher than the direct cupellation described in background technology.
Direct cupellation described in background technology has limited reference for the gold, silver chemical examination of goldmud from cyanide processing, the recovery of gold, silver is respectively 93%, about 90%, the requirement of enterprise for gold, silver grade chemical examination in goldmud from cyanide processing cannot be met at all, directly affects gold mud delivery settlement, have impact on the carrying out of metal balance work.
In the embodiment of the present invention, (1+7) salpeter solution refers to the mixed solution of 1 part of pure nitric acid of top grade and 7 parts of distilled water; (1+1) salpeter solution refers to the mixed solution of 1 part of pure nitric acid of top grade and 1 part of distilled water.
Claims (2)
1. the simultaneous measuring method of gold, silver content in goldmud from cyanide processing, is characterized in that carrying out according to the following step:
The prediction of gold, silver grade in gold mud:
The first step: take two parts, gold mud sample respectively, be labeled as No. 1 sample and No. 2 samples, weight counts m respectively, n; No. 1 sample is directly with sheet lead parcel, and No. 2 samples add high-purity silver powder makes mixed gold, silver than being 1:3 ~ 1:6, then wraps up with sheet lead;
Second step: cupel is put into high temperature furnace 940 DEG C ~ 960 DEG C preheating 30 ~ 40min, then the sample of above-mentioned two parts of sheet leads parcel is put into cupel melting respectively, ash blows, and obtains No. 1 gold and silver and closes grain and No. 2 gold and silver conjunction grains;
3rd step: No. 1 gold and silver is closed grain glacial acetic acid and boils cleaning, dry, weighs close the heavy m of grain
1; No. 2 gold and silver are closed grain and grinds sheet, parting, weigh to obtain gold content m
2; Calculate the prediction grade of gold, silver in gold mud according to the following formula:
Au%=m
2/n×100%;Ag%=(m
1-m
1×m
2/n)/m×100%；
In gold mud, the exact level of gold, silver measures:
4th step: the weight m taking gold mud sample
3, wrap up with sheet lead;
5th step: cupel is put into high temperature furnace 940 DEG C ~ 960 DEG C preheating 30 ~ 40min, then by the 4th step sheet lead parcel cupel melting put into by sample, ash blows, obtain No. 3 gold and silver and close grains;
6th step: the cupel muller after being blown by the 5th step ash is pulverized, and is all transferred to by cupel powder and prepared in the Fire Assaying crucible of material, carries out Fire Assaying operation, obtains No. 4 little conjunction grains of gold and silver;
7th step: No. 3 gold and silver conjunction grains and No. 4 little conjunction grains of gold and silver are boiled with glacial acetic acid in the lump, cleaning, dry, Weighed product obtains m
4;
8th step: the gold mud prediction gold, silver grade calculated according to the 3rd step, a certain amount of high-purity silver powder is added in the 7th step products therefrom, gold, silver ratio is made to be 1:3, wrap up with sheet lead, then put into melting in the cupel of high temperature furnace 940 DEG C ~ 960 DEG C of preheating 30 ~ 40min, ash blows, obtain No. 5 gold and silver and close grains;
9th step: close grain hammer leaf by No. 5, grind sheet, be then rolled into rouleau, successively parting in 1+7 salpeter solution and 1+1 salpeter solution, each 30 ~ 40min, obtains golden volume; Then gold is provided in porcelain crucible; Roll up 3 times with distilled water cleaning gold, be then placed on electric hot plate by porcelain crucible and dry, anneal at 750 DEG C 2-3min in box-type high-temperature furnace, and take out cooling, weigh to obtain golden volume weight m
5;
Tenth step: the exact level calculating gold, silver in gold mud according to lower type: Au%=m
5/ m
3× 100%; Ag%=(m
4-m
5)/m
3× 100%.
2. the simultaneous measuring method of gold, silver content in goldmud from cyanide processing according to claim 1, is characterized in that wherein the 4th step: according to the prediction grade of gold in the gold mud that the 3rd step calculates, take the weight m of gold mud sample
3, make Gold Samples content be m', wrap up with sheet lead; Wherein m'=150 ~ 250mg.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706460A (en) * | 2017-02-27 | 2017-05-24 | 广东省工业分析检测中心 | Analysis method of gold in gold saltcyanide |
| CN113092305A (en) * | 2021-04-12 | 2021-07-09 | 北矿检测技术有限公司 | Method for detecting gold content in coarse impure copper and application |
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| CN1053451A (en) * | 1990-01-19 | 1991-07-31 | 中国黄金总公司白水金矿 | A kind of method that from heavy sand, reclaims mustard gold |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106706460A (en) * | 2017-02-27 | 2017-05-24 | 广东省工业分析检测中心 | Analysis method of gold in gold saltcyanide |
| CN113092305A (en) * | 2021-04-12 | 2021-07-09 | 北矿检测技术有限公司 | Method for detecting gold content in coarse impure copper and application |
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