CN103343224A - Method for quickly extracting gold from gold-containing material - Google Patents
Method for quickly extracting gold from gold-containing material Download PDFInfo
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- CN103343224A CN103343224A CN2013103207697A CN201310320769A CN103343224A CN 103343224 A CN103343224 A CN 103343224A CN 2013103207697 A CN2013103207697 A CN 2013103207697A CN 201310320769 A CN201310320769 A CN 201310320769A CN 103343224 A CN103343224 A CN 103343224A
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Abstract
The invention relates to a method for quickly extracting gold from a gold-containing material, which comprises the following steps: removing arsenic and sulfur from the gold-containing material to some degree, adding the treated gold-containing material powder into a hydrochloric acid solution, adding solid sodium chloride into the solution, stirring the solution at 150 rpm above while keeping the temperature of the solution at 40 DEG C or so, slowly adding an industrial sodium chlorate water solution into the solution, filtering after finishing the addition, and washing solid residue to obtain a filtrate 1 and a solid residue 1; and removing the gold complex ions in the filtrate 1 by reduction precipitation or adsorption, wherein the filtrate of reduction precipitation or the solution after passing through the adsorption column are called a filtrate 2, and the filtrate 2 is partially or wholly substituted for the hydrochloric acid solution for extracting gold in the gold-containing material. The method provided by the invention is especially suitable for extracting gold in high-pozzuolite gold ores; and the gold extraction rate can reach 95% above, the extraction time is 1 hour or so, the extraction temperature is 40 DEG C or so, and the extracting solution can be recycled.
Description
Technical field
The present invention relates to the extraction of gold in the various gold-bearing materials, relate more specifically to desulfurization and dearsenification and contain golden copper anode mud or lead anode slurry, the conventional gold mine of low pozzuolite, contain golden circuit card, contain the extraction of gold in the materials such as golden jewelry and flat width of cloth artwork to a certain degree various obstinate gold mine and electrolysis, be particularly useful for the extraction of desulfurization and dearsenification gold in the obstinate gold mine to a certain degree.
Background technology
Extraction of gold by cyanidation is since being born, because its stable production process, easy and simple to handle, low cost and other advantages is occupied an leading position always.But prussiate toxicity is too big, and cyanidation gold-extracted factory accident takes place frequently all over the world, thus environment has been brought severe contamination, has caused that local resident people extensively worry.For the purpose of environmental protection, many areas, the world had banned use of extraction of gold by cyanidation in recent years.In addition, it is very low that cyanide process is put forward golden rate to the obstinate gold mine that is rich in arsenic, sulphur, often less than 10%.Even for the obstinate gold mine that has removed arsenic, sulphur, cyanidation gold-extracted rate also has only 70% usually.The extraction of gold by cyanidation required time was generally 24 hours.
The ore that is rich in pyrite, arsenopyrite is the difficult obstinate Gold Ore of a class, the form of the following micro-gold of these ore deposit middle part partings is distributed in pyrite and the arsenopyrite, the As that wherein contains and S have a negative impact to cyanidation gold-extracted, making that gold recovery is very low under the cyaniding leaching condition, only is 5%～70%.The pre-treatment that contains the pozzuolite ore has method to have a lot, the two-stage oxidizing roasting method is arranged, various wet methods such as S
2O
3 2-, Cu
2+And NH
3Logical O in the solution
2, Fe
3+Logical O in the solution
2, O
3Fine grinding in pre-treatment, microbiological treatment, nitric acid pretreatment, microwave heating, oxygen pressure treatment, oxygen NaOH processing, electrochemical treatment, flotation, the oxygen atmosphere.Wherein with the most use is that the two-stage oxidizing roasting method removes arsenic and sulphur in the obstinate gold mine of this class, namely earlier under about 450 ℃ of-550 ℃ of weak oxide atmosphere, by gaseous state As
2O
3Overflow and slough most of arsenic, desulfurization and arsenic under 600 ℃ of-700 ℃ of strong oxidizing atmospheres again.
Big at extraction of gold by cyanidation toxicity, it is long to carry the gold time, the Gold Ore that is rich in pyrite, arsenopyrite is put forward the low weakness of golden rate, the present invention proposes the method that a kind of efficient rapid extraction of acidic solution with oxymuriate (mainly being sodium chlorate) is rich in the Gold Ore of arsenic and sulphur and contains gold in the gold-bearing material such as golden circuit card, this method is with two-stage oxidizing roasting method or wet method arsenic in the Gold Ore and sulphur to be removed in advance, extracts wherein gold with oxymuriate acidic solution wet method then.Sodium chlorate is the byproduct of caustic soda industry, and technical purity is generally 99%, and is cheap, and this industrialization for this method provides favourable guarantee.This method characteristics are to put forward golden rate to be generally about 95%, carry gold and the time are generally 1 hour, put forward golden temperature and mostly are about 40 ℃.Acidic extraction liquid usefulness more capable of circulation has realized the zero release of acidic extraction liquid simultaneously, has reduced production cost and Environmental costs.
Summary of the invention
The present invention proposes in a kind of various gold-bearing material the rapid extracting method of gold, relate more specifically to desulfurization and dearsenification to various obstinate gold mine to a certain degree, the conventional gold mine of low pozzuolite, contain the method for the extraction of gold in the material such as golden circuit card.Desulfurization and dearsenification contain golden copper anode mud or lead anode slurry, the conventional gold mine of low pozzuolite, contain golden circuit card, contain extraction golden in the materials such as golden jewelry and flat width of cloth artwork to various obstinate gold mine and electrolysis to a certain degree.
The principle one of the inventive method is with two-stage oxidizing roasting method or wet method arsenic in the Gold Ore and sulphur to be removed in advance, to reduce in the ore arsenic and sulphur to the influence of the extraction yield of gold.The 2nd, the Gold Ore powder after the above-mentioned processing is leached in certain temperature with the acid chloride soln of the strong oxidizing property of chloracid sodium, make complexing ion that gold in the ore is oxidized to the gold that dissolves in diluted acid as
, so just gold by solid transfer in solution, thereby extract.
Particularly, the present invention includes following steps:
The rapid extracting method of gold in a kind of gold-bearing material, it may further comprise the steps, as shown in Figure 1:
1) granularity is added in the hydrochloric acid soln less than 150 microns gold-bearing material powder, concentration of hydrochloric acid is greater than 2mol/L, and the ratio of hydrochloric acid soln volume (liter) and gold-bearing material weight (kilogram) is greater than 5;
2) above-mentioned solution temperature is maintained 20-95 ℃, solution stirring speed maintains more than 150 rev/mins;
3) add industrial oxymuriate (as industrial sodium chlorate and the Potcrate etc.) aqueous solution in the mixing solutions of above-mentioned step 3), the adding speed of oxymuriate per hour should be in every cubic metre of solution add-on less than 8 kilograms.Industry sodium chlorate (chloracid sodium 99wt.%) adding weight is 0.02-0.2 with the ratio of gold-bearing material weight.
4) after oxymuriate adds, filter, wash solid residue, obtain filtrate 1 and solid residue 1.
5) complex ions of gold is removed by precipitate reduction or absorption in the filtrate 1.The filtrate of precipitation or the solution that flows through adsorption column are referred to as filtrate 2.
6) filtrate 2 partly or entirely replaces step 2) middle hydrochloric acid soln, be used for the leaching of gold-bearing material gold.
Further, in the step 1) gold-bearing material content summation of arsenic and sulphur less than 5wt.%.
Further, can in the step 1) hydrochloric acid soln, add solid chloride (as sodium-chlor) or its aqueous solution.Solid chloride can be independent muriate or their mixed chloride such as sodium-chlor, Repone K, magnesium chloride, calcium chloride, iron protochloride or iron(ic) chloride or contain above-mentioned muriatic material.The solid chloride suitable with 1 valency positively charged ion muriate adds the ratio of weight and gold-bearing material weight greater than 0.2;
Further, the oxymuriate acidic solution also can be used the acidic solution that leads to chlorine instead in the step 3).No matter be which kind of solution, the reduction potential of real solution (with respect to hydrogen electrode) should remain on more than the 800mV.
Further, the reductive agent of the used reduction gold ion of precipitate reduction can be in oxalic acid, S-WAT, hydrazine hydrate, the metal (as zinc, aluminium, iron etc.) one or more in the step 5).
Further, sorbent material can be separatory resin or activated carbon etc. in the step 5).When doing fractionation by adsorption, solid-liquid separation step can be used in the step 4), also can.
Further, transfer in the solution 3 after the golden desorb on the step 5) adsorption column.Gold ion comes out with reductive agent precipitate reduction in the step 5) in the solution 3.
Further, filtrate 2 also can be through purifying the leaching liquid that is used as gold-bearing material again in the step 6).Filtrate 2 purifies and can be realized by one or more combinations in the methods such as ion exchange resin, filtering membrane, precipitation, electrolysis.
Further, hydrochloric acid also can be the mixture of hydrochloric acid and other acid (as sulfuric acid) in the step 1).
Thus gold by solid transfer in filtrate, thereby extract, simultaneously acidic extraction liquid usefulness more capable of circulation has realized the zero release of acidic extraction liquid, has reduced production cost.
Embodiment
Method of the present invention will at length be illustrated in this part, it wherein is example with the Gold Ore, yet, those skilled in the art are to be understood that, method of the present invention is not limited in Gold Ore, also can be applied to the raw material that other contain gold, for example the copper and the lead anode slurry that produce of the conventional gold mine of low pozzuolite, metallurgical electrolysis, contain golden circuit card, contain golden jewelry and flat width of cloth artwork etc.
The analysis of gold can be used ICP-AES (ICP-AES) or other analytical procedure such as atomic absorption, spectrophotometry in the filtrate.Gold concentration is designated as C in the filtrate
i(ppm).The volume of filtrate is V (mL) after measured.
Then weight is the extracted amount x of gold in the raw material of W (g)
iFor:
In this article, gold extraction yield η refers to that weight is that W (g) raw material powder is after desulfurization and dearsenification processing, with transferring to the quality of extracting solubility gold in the filtrate and the percentage that drops into the actual golden amount ratio that contains in the raw material powder that reacts after the acid sodium chlorate chloride soln leaching.The extraction yield η of gold is expressed as:
μ is for to use other International Standards Method, and as the golden fire assaying analysis that the specialty analysis personnel carry out, the weight percentage of gold can be regarded standard value in the raw material that draws.
Embodiment 1
Packed in the quartz boat less than 74 microns 600 ℃ of dried powders of gold mine (arsenic and sulphur content are respectively 3.4wt.% and 32.7wt.%) that are rich in arsenic and sulphur in 10.0000 gram particles footpaths, quartz boat is placed the reaction tubes of the flat-temperature zone of openable tube furnace up and down.Then tube furnace is warming up to 600 ℃ under the argon gas condition of logical 16cm/min, logical argon 2 hours.In argon gas atmosphere furnace temperature is risen to 650 ℃ then, argon gas is switched to 16cm/min oxygen again, logical oxygen 2 hours is cooled to room temperature with furnace temperature, and quartz boat is taken out from reaction tubes.After above-mentioned pre-treatment, arsenic and sulphur content are respectively 0.075wt.% and 1.59wt.% in the gold mine powder.
The pretreated gold mine powder of above-mentioned process all is transferred in the 250ml there-necked flask by quartz boat, add 100ml hydrochloric acid soln (concentration of hydrochloric acid 3mol/L), add the dry sodium-chlor of 2 grams again, with polytetrafluoro magnetic stir bar stirred solution, mixing speed is 200r/min, with water-bath above-mentioned mixed solution is heated to 40 ℃, slowly adds the sodium chlorate (NaClO of 5 (w/v) % with peristaltic pump
3) solution 15ml, add whole 15ml sodium chlorate solutions after 60 minutes, stop heated and stirred then, filter, wash filter residue, obtain filtrate.
Analyze the concentration (ppm) of gold in the filtrate with plasma mass (ICP-AES).After measured, Jin extraction yield η is 97%.
Embodiment 2
Packed in the quartz boat less than 74 microns 600 ℃ of dried powders of gold mine (arsenic and sulphur content are respectively 3.4wt.% and 32.7wt.%) that are rich in arsenic and sulphur in 10.0000 gram particles footpaths, quartz boat is placed the reaction tubes of the flat-temperature zone of openable tube furnace up and down.Then tube furnace is warming up to 600 ℃ under the argon gas condition of logical 16cm/min, logical argon 2 hours.In argon gas atmosphere furnace temperature is risen to 650 ℃ then, argon gas is switched to 16cm/min oxygen again, logical oxygen 2 hours is cooled to room temperature with furnace temperature, and quartz boat is taken out from reaction tubes.After above-mentioned pre-treatment, arsenic and sulphur content are respectively 0.075wt.% and 1.59wt.% in the gold mine powder.
The pretreated gold mine powder of above-mentioned process all is transferred in the 250ml there-necked flask by quartz boat, add 100ml hydrochloric acid soln (concentration of hydrochloric acid 3mol/L), with polytetrafluoro magnetic stir bar stirred solution, mixing speed is 200r/min, with water-bath above-mentioned mixed solution is heated to 40 ℃, slowly adds the sodium chlorate (NaClO of 5 (w/v) % with peristaltic pump
3) solution 15ml, add whole 15ml sodium chlorate solutions after 60 minutes, stop heated and stirred then, filter, wash filter residue, obtain filtrate.
Analyze the concentration (ppm) of gold in the filtrate with plasma mass (ICP-AES).After measured, Jin extraction yield η is 64%.
Embodiment 3
Packed in the quartz boat less than 74 microns 600 ℃ of dried powders of gold mine (arsenic and sulphur content are respectively 3.4wt.% and 32.7wt.%) that are rich in arsenic and sulphur in 10.0000 gram particles footpaths, quartz boat is placed the reaction tubes of the flat-temperature zone of openable tube furnace up and down.Then tube furnace is warming up to 600 ℃ under the argon gas condition of logical 16cm/min, logical argon 2 hours.In argon gas atmosphere furnace temperature is risen to 650 ℃ then, argon gas is switched to 16cm/min oxygen again, logical oxygen 0.5 hour is cooled to room temperature with furnace temperature, and quartz boat is taken out from reaction tubes.After above-mentioned pre-treatment, arsenic and sulphur content are respectively 0.075wt.% and 4.92wt.% in the gold mine powder.
The pretreated gold mine powder of above-mentioned process all is transferred in the 250ml there-necked flask by quartz boat, add 100ml hydrochloric acid soln (concentration of hydrochloric acid 3mol/L), add the dry sodium-chlor of 2 grams again, with polytetrafluoro magnetic stir bar stirred solution, mixing speed is 200r/min, with water-bath above-mentioned mixed solution is heated to 40 ℃, slowly adds the sodium chlorate (NaClO of 5 (w/v) % with peristaltic pump
3) solution 15ml, add whole 15ml sodium chlorate solutions after 60 minutes, stop heated and stirred then, filter, wash filter residue, obtain filtrate.
Analyze the concentration (ppm) of gold in the filtrate with plasma mass (ICP-AES).After measured, Jin extraction yield η is 91%.
Claims (10)
1. the rapid extracting method of gold in the gold-bearing material, it may further comprise the steps:
1) granularity is added in the hydrochloric acid soln less than 150 microns gold-bearing material powder, concentration of hydrochloric acid is greater than 2mol/L, and the ratio of hydrochloric acid soln volume (liter) and gold-bearing material weight (kilogram) is greater than 5;
2) above-mentioned solution temperature is maintained 20-95 ℃, solution stirring speed maintains more than 150 rev/mins;
3) in the mixing solutions of above-mentioned step 3), add industrial oxymuriate (as industrial sodium chlorate and the Potcrate etc.) aqueous solution, the adding speed of oxymuriate per hour should be in every cubic metre of solution add-on less than 8 kilograms, and the ratio that industrial sodium chlorate (chloracid sodium 99wt.%) adds weight and gold-bearing material weight is 0.02-0.2;
4) after oxymuriate adds, filter, wash solid residue, obtain filtrate 1 and solid residue 1;
5) complex ions of gold is removed by precipitate reduction or absorption in the filtrate 1.The filtrate of precipitation or the solution that flows through adsorption column are referred to as filtrate 2;
6) filtrate 2 partly or entirely replaces step 2) middle hydrochloric acid soln, be used for the leaching of gold-bearing material gold.
2. method according to claim 1, wherein in the step 1) gold-bearing material content summation of arsenic and sulphur less than 5wt.%.
3. method according to claim 1 can add solid chloride (as sodium-chlor) or its aqueous solution in the step 1) hydrochloric acid soln.Solid chloride can be independent muriate or their mixed chloride such as sodium-chlor, Repone K, magnesium chloride, calcium chloride, iron protochloride or iron(ic) chloride or contain above-mentioned muriatic material.
4. method according to claim 3, the solid chloride suitable with 1 valency positively charged ion muriate add the ratio of weight and gold-bearing material weight greater than 0.2.
5. method according to claim 1, wherein the oxymuriate acidic solution also can be used the acidic solution of logical chlorine instead in the step 3), no matter is which kind of solution, and the reduction potential of real solution (with respect to hydrogen electrode) should remain on more than the 800mV.
6. method according to claim 1, wherein the reductive agent of the used reduction gold ion of precipitate reduction can be in oxalic acid, S-WAT, hydrazine hydrate, the metal (as zinc, aluminium, iron etc.) one or more in the step 5).
7. method according to claim 1, wherein sorbent material can be separatory resin or activated carbon etc. in the step 5), when doing fractionation by adsorption, solid-liquid separation step can be used in the step 4), also can.
8. method according to claim 1 is wherein transferred in the solution 3 after the golden desorb on the step 5) adsorption column, and gold ion comes out with reductive agent precipitate reduction in the step 5) in the solution 3.
9. method according to claim 1, wherein filtrate 2 also can be through purifying the leaching liquid as gold-bearing material again in the step 6), and filtrate 2 purifies can be by in the methods such as ion exchange resin, filtering membrane, precipitation, electrolysis one or more in conjunction with being realized.
10. method according to claim 1, wherein hydrochloric acid also can be the mixture of hydrochloric acid and other acid (as sulfuric acid) in the step 1).
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104263961A (en) * | 2014-09-23 | 2015-01-07 | 铜仁市万山区盛和矿业有限责任公司 | Method for extracting gold from pyrite |
| CN104263962A (en) * | 2014-09-23 | 2015-01-07 | 铜仁市万山区盛和矿业有限责任公司 | Method for extracting gold from pyrrhotite |
| CN104263963A (en) * | 2014-09-23 | 2015-01-07 | 铜仁市万山区盛和矿业有限责任公司 | Method for extracting gold from geierite |
| CN103695653B (en) * | 2014-01-02 | 2016-06-08 | 沈少波 | A kind of method of noble metal on wet underwater welding circuit board |
| CN105714122A (en) * | 2016-03-08 | 2016-06-29 | 开封大学 | Method for recovering gold, iron and lead in cyanide tailings |
| CN106222435A (en) * | 2016-08-24 | 2016-12-14 | 铜仁市万山区盛和矿业有限责任公司 | A kind of method utilizing microwave to extract gold from arsenical pyrite |
| CN106222436A (en) * | 2016-08-24 | 2016-12-14 | 铜仁市万山区盛和矿业有限责任公司 | A kind of microwave extract method of magnetic iron ore |
| TWI626217B (en) * | 2017-01-24 | 2018-06-11 | 健鼎科技股份有限公司 | Method Of Making Inorganic Gold Compound |
| US10046976B1 (en) | 2017-01-25 | 2018-08-14 | Tripod Technology Corporation | Method of making inorganic gold compound |
| CN109082537A (en) * | 2018-07-11 | 2018-12-25 | 开封大学 | A kind of roasting Gold Concentrate under Normal Pressure method of comprehensive utilization |
| CN111850565A (en) * | 2020-07-16 | 2020-10-30 | 昆山全亚冠环保科技有限公司 | Method for recovering gold and iodine from etching waste liquid |
| CN112981130A (en) * | 2021-02-07 | 2021-06-18 | 黄靖凯 | Environment-friendly gold extraction agent and preparation method thereof |
| CN113617801A (en) * | 2021-08-11 | 2021-11-09 | 湖南行者环保科技有限公司 | Method for microwave industrial treatment of sulfur-containing and arsenic-containing material |
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| CN103695653B (en) * | 2014-01-02 | 2016-06-08 | 沈少波 | A kind of method of noble metal on wet underwater welding circuit board |
| CN104263961A (en) * | 2014-09-23 | 2015-01-07 | 铜仁市万山区盛和矿业有限责任公司 | Method for extracting gold from pyrite |
| CN104263962A (en) * | 2014-09-23 | 2015-01-07 | 铜仁市万山区盛和矿业有限责任公司 | Method for extracting gold from pyrrhotite |
| CN104263963A (en) * | 2014-09-23 | 2015-01-07 | 铜仁市万山区盛和矿业有限责任公司 | Method for extracting gold from geierite |
| CN104263961B (en) * | 2014-09-23 | 2016-03-30 | 铜仁市万山区盛和矿业有限责任公司 | A kind of method extracting gold from pyrite |
| CN104263962B (en) * | 2014-09-23 | 2016-08-17 | 铜仁市万山区盛和矿业有限责任公司 | A kind of method extracting gold from magnetic iron ore |
| CN104263963B (en) * | 2014-09-23 | 2016-08-24 | 铜仁市万山区盛和矿业有限责任公司 | A kind of method extracting gold from arsenical pyrite |
| CN105714122A (en) * | 2016-03-08 | 2016-06-29 | 开封大学 | Method for recovering gold, iron and lead in cyanide tailings |
| CN106222435A (en) * | 2016-08-24 | 2016-12-14 | 铜仁市万山区盛和矿业有限责任公司 | A kind of method utilizing microwave to extract gold from arsenical pyrite |
| CN106222436A (en) * | 2016-08-24 | 2016-12-14 | 铜仁市万山区盛和矿业有限责任公司 | A kind of microwave extract method of magnetic iron ore |
| TWI626217B (en) * | 2017-01-24 | 2018-06-11 | 健鼎科技股份有限公司 | Method Of Making Inorganic Gold Compound |
| US10046976B1 (en) | 2017-01-25 | 2018-08-14 | Tripod Technology Corporation | Method of making inorganic gold compound |
| CN109082537A (en) * | 2018-07-11 | 2018-12-25 | 开封大学 | A kind of roasting Gold Concentrate under Normal Pressure method of comprehensive utilization |
| CN109082537B (en) * | 2018-07-11 | 2020-09-01 | 开封大学 | Comprehensive utilization method of roasted gold concentrate |
| CN111850565A (en) * | 2020-07-16 | 2020-10-30 | 昆山全亚冠环保科技有限公司 | Method for recovering gold and iodine from etching waste liquid |
| CN112981130A (en) * | 2021-02-07 | 2021-06-18 | 黄靖凯 | Environment-friendly gold extraction agent and preparation method thereof |
| CN113617801A (en) * | 2021-08-11 | 2021-11-09 | 湖南行者环保科技有限公司 | Method for microwave industrial treatment of sulfur-containing and arsenic-containing material |
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Application publication date: 20131009 |