CN105734281B - A kind of environment-friendly type composite noble metal leaching agent and its application method - Google Patents
A kind of environment-friendly type composite noble metal leaching agent and its application method Download PDFInfo
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- CN105734281B CN105734281B CN201410750533.1A CN201410750533A CN105734281B CN 105734281 B CN105734281 B CN 105734281B CN 201410750533 A CN201410750533 A CN 201410750533A CN 105734281 B CN105734281 B CN 105734281B
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Abstract
A kind of environment-friendly type composite noble metal leaching agent and preparation method thereof, is 1 according to weight ratio by oxidant A, modified humic acid salt B and amino acid C:1‑5:15 ratio mixing.The application method of the leaching agent is also disclosed, its step is as follows:（1）First raw ore is ground by ball mill, the granularity for being milled to 90% muck is less than 74 μm；（2）Water use regulation pulp density reaches 15 70%；（3）With lime or caustic soda or soda ash regulation slurry pH so that pH values of pulp>10；（4）100~5000 grams of leaching agent described in ore or miberal powder addition claim 2 per ton；（5）Inflation, stirring, leaching, extraction time are 10 48 hours；（6）Gold, silver are reclaimed using zinc dust precipitation or charcoal absorption or ion exchange resin.The present invention can be widely applied to the production in noble metal mine, the leaching agent nontoxic pollution-free, compared with other all nontoxic or low toxicity beneficiation reagents, with effect is good, the property of medicine is stable, product is environmentally friendly, production method is simple, the low feature of cost.
Description
Technical field
The invention belongs to technical field of beneficiation, and in particular to a kind of environment-friendly type noble metal leaching agent and its application method.
Background technology
Gold ore can be greatly classified into sulphide ore and the major class of oxide ore two from mineral composition.In gold mine production technology
In, " flotation+gold concentrate roasting+cyanidation gold-extracted " technique is mainly used to sulphide ore；And for oxide ore, be exactly using most
All sliming cyanidation or heap drench technique.Certainly, gold mines numerous at present is all using the Cymag of severe toxicity as the golden agent of leaching.
According to statistics, China's Sodium Cyanide Production ability alreadys exceed Australia and the U.S., as the first big producer in the world.2013
The t/a of China's Cymag total productive capacity about 500,000 (folding 100%), wherein 20% is accounted for for gold mine, in other words, I
The cyanidation gold-extracted Cymag of state's gold mine reaches more than 100,000 tons.Some import Cymag is not included in.
Because the hypertoxic cyanide of enormous amount is in gold mine application, national gold mine is annual because of misoperation, mistake
The example for people and animals' death that the reasons such as food, breathing poisoning are caused is countless, and underground is caused containing hypertoxic cyanide mine tailing seepage
The example of river pollution is also too numerous to enumerate, in addition, cyanide is from buying transport, then to all too many levels such as storage applications, by
To the strict monitoring and control of public security department, cause the increase of practical application cost a lot.Therefore, gold mine enterprise is without being not intended to
Hypertoxic Cymag is replaced using nontoxic gold extracting agent, to solve the problems that gold ribbon is carried using hypertoxic Cymag.
Because the Cymag used in Cyanide Process is Poisons, so, each pan state of the world is to non-cyanide leaching gold
Medicament has carried out substantial amounts of research, and the non-cyanogen medicament reported has more than ten kinds.The research for carrying gold to non-cyanogen at present can be divided mainly into
Two major classes:1. gold is carried in acid medium, such as Thiourea-uv Method, water chlorination process, bromination method, iodide process, rhodanate method are 2. in alkali
Gold, such as polysulfide method, thiosulfate technique, lime sulfur method are carried in property medium.These above-mentioned methods be respectively provided with it is nontoxic or
Toxicity is smaller than cyanide, leaching velocity is fast and the advantages of to the strong adaptability of impurity, but these methods are all also different degrees of deposits
Reagent consumption amount is big, in production difficult control, the shortcomings of production cost is high, some techniques still have compared with high toxicity, need into
One step is perfect, especially to strengthen commerical test research, accelerate process of industrialization.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention, which provides one kind, can replace hypertoxic cyanide, fast with leaching velocity,
Leaching rate height, low cost, stable production process noble metal leaching agent and its application method.
The purpose of the present invention is achieved through the following technical solutions：
A kind of environment-friendly type composite noble metal leaching agent, the leaching agent is by oxidant A, modified humic acid salt B, amino acid C
Composition.
Oxidant A:Modified humic acid salt B:Amino acid C weight ratio is 1:1-5:1-5.
The oxidant A is CaO2、Na2S2O8、K2S2O8、(NH4)2S2O8、2Na2CO3·3H2O2In one or more.
The oxidant A is CaO2Or K2S2O8。
The modified humic acid salt B is sulfonated humic acid sodium, nitrification sodium humate, sulfonated humic acid ammonium, nitrification humic acid
One or more in ammonium, sulfonated humic acid, nitrification humic acid.
The modified humic acid salt B is sulfonated humic acid ammonium or sulfonated humic acid.
The amino acid C is one kind in glycine, histidine, cysteine, winter propylhomoserin, aminoacetic acid, phenylalanine
Or it is several.
The amino acid C is cysteine or phenylalanine.
A kind of environment-friendly type composite noble metal leaching agent, the leaching agent is by oxidant A, modified humic acid salt B, amino acid C
Composition, oxidant A:Modified humic acid salt B:Amino acid C weight ratio is 1:1-5:1-5, its application method comprises the following steps：
(1) first raw ore is ground by ball mill, the granularity for being milled to 90% muck is less than 74 μm；
(2) water use regulation pulp density reaches 15-70%；
(3) with lime or caustic soda or soda ash regulation slurry pH so that pH values of pulp>10；
(4) 100~5000 grams of leaching agent described in ore or miberal powder addition claim 2 per ton；
(5) inflate, stir, leach, extraction time is 10-48 hours；
(6) gold, silver are reclaimed using zinc dust precipitation or charcoal absorption or ion exchange resin.
Water use regulation pulp density reaches 35-45% in the step (2).
The beneficial effects of the invention are as follows：
1st, definitely green non-poisonous, alternative hypertoxic Cymag is widely used in the production in noble metal mine, for example：Gold mine, silver
The drill traverse of the ore deposit such as ore deposit and platinum palladium, heap are drenched, pond is soaked etc..
2nd, leaching velocity is fast, leaching rate is high, high-low temperature resistant.
3rd, product processes are simple, performance is stable, medicine is environmentally friendly, cost is relatively low.
Embodiment
Embodiment 1
A kind of application method of environment-friendly type composite noble metal leaching agent, comprises the following steps：
(1) CaO is taken210 parts, K2S2O830 parts of 10 parts, 30 parts of sulfonated humic acid ammonium and cysteine, are mixed in vortex mixer
It is even, leaching agent is made；
(2) first raw ore (1.95g/t containing gold, sulfur grade 1.64%) is ground by ball mill, is milled to the grain of 90% muck
Degree is less than 74 μm；
(3) water use regulation pulp density reaches 40%；
(4) with lime or caustic soda or soda ash regulation slurry pH so that pH values of pulp is 11；
(5) 2500 grams of leaching agent described in ore or miberal powder addition step (1) per ton；
(6) inflate, stir, leach, extraction time is 24 hours；
(7) gold, silver are reclaimed using zinc dust precipitation or charcoal absorption or ion exchange resin.
(8) sampling analysis phase analysis gold grade, it is 0.28g/t to draw phase analysis gold grade, and leaching rate is 85.64%.
Embodiment 2
A kind of application method of environment-friendly type composite noble metal leaching agent, comprises the following steps：
(1) CaO is taken210 parts, K2S2O840 parts of 10 parts, 40 parts of sulfonated humic acid ammonium and cysteine, are mixed in vortex mixer
It is even, leaching agent is made；
(2) first raw ore (6.46g/t containing gold, silver 124.6g/t, sulfur grade 2.38%) is ground by ball mill, be milled to
The granularity of 90% muck is less than 74 μm；
(3) water use regulation pulp density reaches 40%；
(4) with lime or caustic soda or soda ash regulation slurry pH so that pH values of pulp is 12；
(5) 2500 grams of leaching agent described in ore or miberal powder addition step (1) per ton；
(6) inflate, stir, leach, extraction time is 24 hours；
(7) gold, silver are reclaimed using zinc dust precipitation or charcoal absorption or ion exchange resin.
(8) taste of sampling analysis phase analysis gold and silver taste, it is 0.53g/t to draw phase analysis gold grade, and silver-colored grade is 31.62g/
T, gold leaching rate is that 91.8%, silver leaching rate is 74.62%.
Embodiment 3
A kind of application method of environment-friendly type composite noble metal leaching agent, comprises the following steps：
(1) CaO is taken210 parts, (NH4)2S2O850 parts of 10 parts, 50 parts of sulfonated humic acid sodium and phenylalanine, in mixing
Mixed in device, leaching agent is made；
(2) first raw ore (4.61g/t containing gold, sulfur grade 0.38g/t, arsenic grade 0.45%) is ground by ball mill, ground
Granularity to 90% muck is less than 74 μm；
(3) water use regulation pulp density reaches 40%；
(4) with lime or caustic soda or soda ash regulation slurry pH so that pH values of pulp is 12；
(5) 2000 grams of leaching agent described in ore or miberal powder addition step (1) per ton；
(6) inflate, stir, leach, extraction time is 24 hours；
(7) gold, silver are reclaimed using zinc dust precipitation or charcoal absorption or ion exchange resin.
(8) sampling analysis phase analysis gold grade and silver-colored grade, it is 0.47g/t to draw phase analysis gold grade, and gold leaching rate is
89.81%.
Embodiment 4
A kind of application method of environment-friendly type composite noble metal leaching agent, comprises the following steps：
(1) CaO is taken210 parts, (NH4)2S2O840 parts of 10 parts, 60 parts of sulfonated humic acid ammonium and cysteine, in vortex mixer
It is middle to mix, leaching agent is made；
(2) first raw ore (1.69g/t containing gold, sulfur grade 0.21g/t, arsenic grade 0.05%) is ground by ball mill, ground
Granularity to 90% muck is less than 5mm, is fitted into post bath unit；
(3) water use regulation pulp density reaches 40%；
(4) with lime or caustic soda or soda ash regulation slurry pH so that pH values of pulp is 12；
(5) 1850 grams of leaching agent described in ore or miberal powder addition step (1) per ton, 1 ‰ concentration are configured to by leaching agent
Solution；
(6) ore in circulated sprinkling post, the shower-bubble type time is 25 days；
(7) gold, silver are reclaimed using zinc dust precipitation or charcoal absorption or ion exchange resin.
(8) sampling analysis phase analysis gold grade and silver-colored grade, it is 0.36g/t to draw phase analysis gold grade, and gold leaching rate is
78.70%.
Embodiment 5
A kind of application method of environment-friendly type composite noble metal leaching agent, comprises the following steps：
(1) Na is taken2S2O810 parts, 2Na2CO3·3H2O210 parts, nitrification 10 parts of ammonium humate, nitrification 10 parts of sodium humate,
10 parts of 10 parts of histidine and glycine, are mixed in vortex mixer, and leaching agent is made；
(2) first raw ore (7.21g/t containing gold, sulfur grade 4.06%) is ground by ball mill, is milled to the grain of 90% muck
Degree is less than 74 μm；
(3) water use regulation pulp density reaches 15%；
(4) with lime or caustic soda or soda ash regulation slurry pH so that pH values of pulp is 11；
(5) 100 grams of leaching agent described in ore or miberal powder addition step (1) per ton；
(6) inflate, stir, leach, extraction time is 48 hours；
(7) gold, silver are reclaimed using zinc dust precipitation or charcoal absorption or ion exchange resin.
(8) taste of sampling analysis phase analysis gold and silver-colored grade, it is 0.88g/t to draw phase analysis gold grade, and gold leaching rate is
87.8%.
Embodiment 6
A kind of application method of environment-friendly type composite noble metal leaching agent, comprises the following steps：
(1) K is taken2S2O810 parts, 2Na2CO3·3H2O210 parts, nitrification 50 parts of humic acid, 50 parts of sulfonated humic acid, winter ammonia
50 parts of 50 parts of acid and aminoacetic acid, are mixed in vortex mixer, and leaching agent is made；
(2) first raw ore (5.52g/t containing gold, sulfur grade 1.88%) is ground by ball mill, is milled to the grain of 90% muck
Degree is less than 74 μm；
(3) water use regulation pulp density reaches 70%；
(4) with lime or caustic soda or soda ash regulation slurry pH so that pH values of pulp is 12；
(5) 5000 grams of leaching agent described in ore or miberal powder addition step (1) per ton；
(6) inflate, stir, leach, extraction time is 10 hours；
(7) gold, silver are reclaimed using zinc dust precipitation or charcoal absorption or ion exchange resin.
(8) taste of sampling analysis phase analysis gold and silver-colored grade, it is 0.83g/t to draw phase analysis gold grade, and gold leaching rate is
84.96%.
Embodiment 7
A kind of application method of environment-friendly type composite noble metal leaching agent, comprises the following steps：
(1) K is taken2S2O810 parts, (NH4)2S2O810 parts, 20 parts of sulfonated humic acid ammonium, 20 parts of sulfonated humic acid, winter propylhomoserin
20 parts and 20 parts of phenylalanine, are mixed in vortex mixer, and leaching agent is made；
(2) first raw ore (2.36g/t containing gold, sulfur grade 0.38%) is ground by ball mill, is milled to the grain of 90% muck
Degree is less than 74 μm；
(3) water use regulation pulp density reaches 35%；
(4) with lime or caustic soda or soda ash regulation slurry pH so that pH values of pulp is 12；
(5) 3000 grams of leaching agent described in ore or miberal powder addition step (1) per ton；
(6) inflate, stir, leach, extraction time is 36 hours；
(7) gold, silver are reclaimed using zinc dust precipitation or charcoal absorption or ion exchange resin.
(8) taste of sampling analysis phase analysis gold and silver-colored grade, it is 0.30g/t to draw phase analysis gold grade, and gold leaching rate is
87.3%.
Oxidant A, modified humic acid salt in a kind of application method of environment-friendly type composite noble metal leaching agent, the leaching agent
B, amino acid C also have consisting of mode：
On the basis of above-described embodiment, oxidant A is according to the sequential loop shown in above table, modified humic acid salt
B gradually replaces with sulfonated humic acid sodium and nitrification sodium humate；Sulfonated humic acid sodium and sulfonated humic acid ammonium；Sulfonated humic acid sodium
With nitrification ammonium humate；Sulfonated humic acid sodium and sulfonated humic acid；Sulfonated humic acid sodium and nitrification humic acid；Nitrify sodium humate
With sulfonated humic acid ammonium；Nitrify sodium humate and nitrification ammonium humate；Nitrify sodium humate and sulfonated humic acid；Nitrify humic acid
Sodium and nitrification humic acid；Sulfonated humic acid ammonium and nitrification ammonium humate；Sulfonated humic acid ammonium and sulfonated humic acid；Sulfonated humic acid
Ammonium and nitrification humic acid；Nitrify ammonium humate and sulfonated humic acid；Nitrify ammonium humate and nitrification humic acid；Sulfonated humic acid and
Nitrify humic acid；Sulfonated humic acid sodium, nitrification sodium humate and sulfonated humic acid ammonium；Sulfonated humic acid sodium, nitrification sodium humate
With nitrification ammonium humate；Sulfonated humic acid sodium, nitrification sodium humate and sulfonated humic acid；Sulfonated humic acid sodium, nitrification humic acid
Sodium and nitrification humic acid；Nitrify sodium humate, sulfonated humic acid ammonium and nitrification ammonium humate；Sodium humate, sulfonation corruption is nitrified to plant
Sour ammonium and sulfonated humic acid；Nitrify sodium humate, sulfonated humic acid ammonium and nitrification humic acid；Sulfonated humic acid ammonium, nitrification are rotten to plant
Sour ammonium and sulfonated humic acid；Sulfonated humic acid ammonium, nitrification ammonium humate and nitrification humic acid；Nitrify ammonium humate, sulfonation humic
Acid and nitrification humic acid；Sulfonated humic acid sodium, nitrification sodium humate, sulfonated humic acid ammonium and nitrification ammonium humate；Sulfonation corruption is planted
Sour sodium, nitrification sodium humate, sulfonated humic acid ammonium and sulfonated humic acid；Sulfonated humic acid sodium, nitrification sodium humate, sulfonation corruption are planted
Sour ammonium and nitrification humic acid；Sulfonated humic acid sodium, nitrification sodium humate, sulfonated humic acid ammonium, nitrification ammonium humate and sulfonation are rotten
Grow acid；Sulfonated humic acid sodium, nitrification sodium humate, sulfonated humic acid ammonium, nitrification ammonium humate and nitrification humic acid；Sulfonation corruption is planted
Sour sodium, nitrification sodium humate, sulfonated humic acid ammonium, nitrification ammonium humate, sulfonated humic acid and nitrification humic acid；
Circulated in the order described above according to the sequential loop in above table, modified humic acid salt B in oxidant A, amino
Sour C gradually replaces with glycine；Histidine；Cysteine；Winter propylhomoserin；Aminoacetic acid；Phenylalanine；Glycine and histidine；
Glycine and cysteine；Glycine and winter propylhomoserin；Glycine and aminoacetic acid；Glycine and phenylalanine；Histidine and half
Cystine；Histidine and winter propylhomoserin；Histidine and aminoacetic acid；Histidine and phenylalanine；Cysteine and winter propylhomoserin；Half Guang
Propylhomoserin and aminoacetic acid；Cysteine and phenylalanine；Winter propylhomoserin and aminoacetic acid；Winter propylhomoserin and phenylalanine；Aminoacetic acid and
Phenylalanine；Glycine, histidine and cysteine；Glycine, histidine and winter propylhomoserin；Glycine, histidine and second ammonia
Acid；Glycine, histidine and phenylalanine；Histidine, cysteine and winter propylhomoserin；Histidine, cysteine and aminoacetic acid；
Histidine, cysteine and phenylalanine；Cysteine, winter propylhomoserin and aminoacetic acid；Cysteine, winter propylhomoserin and the ammonia of phenyl third
Acid；Winter propylhomoserin, aminoacetic acid and phenylalanine；Glycine, histidine, cysteine and winter propylhomoserin；Glycine, histidine, half
Cystine and aminoacetic acid；Glycine, histidine, cysteine and phenylalanine；Histidine, cysteine, winter propylhomoserin and second
Propylhomoserin；Histidine, cysteine, winter propylhomoserin and phenylalanine；Cysteine, winter propylhomoserin, aminoacetic acid, phenylalanine；It is sweet
Propylhomoserin, histidine, cysteine, winter propylhomoserin and aminoacetic acid；Glycine, histidine, cysteine, winter propylhomoserin and the ammonia of phenyl third
Acid；Glycine, histidine, cysteine, winter propylhomoserin, aminoacetic acid and phenylalanine.
Claims (6)
1. a kind of environment-friendly type composite noble metal leaching agent, it is characterised in that：The leaching agent is by oxidant A, modified humic acid salt
B, amino acid C are constituted, oxidant A:Modified humic acid salt B:Amino acid C weight ratio is 1:1-5:1-5.
2. a kind of environment-friendly type composite noble metal leaching agent according to claim 1, it is characterised in that：The oxidant A is
CaO2、Na2S2O8、K2S2O8 、(NH4)2S2O8、2Na2CO3·3H2O2In one or more.
3. a kind of environment-friendly type composite noble metal leaching agent according to claim 1, it is characterised in that：The modified humic acid
Salt B is sulfonated humic acid sodium, nitrification sodium humate, sulfonated humic acid ammonium, nitrification ammonium humate, sulfonated humic acid, nitrification is rotten plants
One or more in acid.
4. a kind of environment-friendly type composite noble metal leaching agent according to claim 1, it is characterised in that：The amino acid C is
One or more in glycine, histidine, cysteine, winter propylhomoserin, aminoacetic acid, phenylalanine.
5. a kind of application method of environment-friendly type composite noble metal leaching agent according to claim 1, it is characterised in that：It makes
Comprised the following steps with method：
（1）First raw ore is ground by ball mill, the granularity for being milled to 90% muck is less than 74 μm；
（2）Water use regulation pulp density reaches 15-70%；
（3）With lime or caustic soda or soda ash regulation slurry pH so that pH values of pulp>10；
（4）100~5000 grams of leaching agent described in ore or miberal powder addition claim 1 per ton；
（5）Inflation, stirring, leaching, extraction time are 10-48 hours；
（6）Gold, silver are reclaimed using zinc dust precipitation or charcoal absorption or ion exchange resin.
6. a kind of application method of environment-friendly type composite noble metal leaching agent according to claim 5, it is characterised in that：It is described
Step（2）Middle first water use regulation pulp density reaches 35-45%.
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| CN106191460B (en) * | 2016-09-13 | 2018-12-04 | 中国科学院上海高等研究院 | A kind of no cyanogen extractant and process for extracting gold |
| CN107674994A (en) * | 2017-09-22 | 2018-02-09 | 长春黄金研究院 | A kind of nontoxic while Leaching of Gold of cleaning, the method for copper |
| CN109499625B (en) * | 2018-11-06 | 2021-09-28 | 长春黄金研究院有限公司 | High-efficiency elution method for gold-loaded resin |
| CN111004922A (en) * | 2019-12-12 | 2020-04-14 | 昆明理工大学 | Method for recovering gold in thiosulfate system |
| CN117947279A (en) * | 2024-03-26 | 2024-04-30 | 中国矿业大学(北京) | Method for improving leaching rate of gold ore |
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| CN103695644A (en) * | 2013-12-13 | 2014-04-02 | 李敬坤 | Gold and silver leaching agent prepared from cyanate and method for recovering gold and silver by using leaching agent |
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