CN104263961A - Method for extracting gold from pyrite - Google Patents
Method for extracting gold from pyrite Download PDFInfo
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- CN104263961A CN104263961A CN201410490074.8A CN201410490074A CN104263961A CN 104263961 A CN104263961 A CN 104263961A CN 201410490074 A CN201410490074 A CN 201410490074A CN 104263961 A CN104263961 A CN 104263961A
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- gold
- pyrite
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- 239000010931 gold Substances 0.000 title abstract description 66
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title abstract description 56
- 229910052737 gold Inorganic materials 0.000 title abstract description 56
- 238000000034 method Methods 0.000 title abstract description 52
- 229910052683 pyrite Inorganic materials 0.000 title abstract description 37
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 title abstract description 37
- 239000011028 pyrite Substances 0.000 title abstract description 37
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 abstract description 36
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract description 24
- 239000011347 resin Substances 0.000 abstract description 20
- 229920005989 resin Polymers 0.000 abstract description 20
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract description 17
- 230000002829 reductive effect Effects 0.000 abstract description 17
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 8
- 238000002386 leaching Methods 0.000 abstract description 7
- 238000000605 extraction Methods 0.000 abstract description 6
- 239000013078 crystal Substances 0.000 abstract description 4
- 229910052697 platinum Inorganic materials 0.000 abstract description 4
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 150000001450 anions Chemical class 0.000 abstract 2
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 238000003795 desorption Methods 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 238000003756 stirring Methods 0.000 description 65
- 239000000284 extract Substances 0.000 description 21
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 20
- 239000000706 filtrate Substances 0.000 description 20
- 125000000129 anionic group Chemical group 0.000 description 17
- 239000003795 chemical substances by application Substances 0.000 description 16
- 239000007788 liquid Substances 0.000 description 16
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 15
- OUUQCZGPVNCOIJ-UHFFFAOYSA-M Superoxide Chemical compound [O-][O] OUUQCZGPVNCOIJ-UHFFFAOYSA-M 0.000 description 15
- 239000002956 ash Substances 0.000 description 15
- 238000006243 chemical reaction Methods 0.000 description 15
- 238000001914 filtration Methods 0.000 description 15
- 238000002156 mixing Methods 0.000 description 13
- 238000002203 pretreatment Methods 0.000 description 8
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 6
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 6
- 229910000906 Bronze Inorganic materials 0.000 description 5
- 239000010974 bronze Substances 0.000 description 5
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 5
- 125000001183 hydrocarbyl group Chemical group 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000004513 sizing Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- CAMXVZOXBADHNJ-UHFFFAOYSA-N ammonium nitrite Chemical compound [NH4+].[O-]N=O CAMXVZOXBADHNJ-UHFFFAOYSA-N 0.000 description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 239000001509 sodium citrate Substances 0.000 description 3
- 235000010288 sodium nitrite Nutrition 0.000 description 3
- PFUVRDFDKPNGAV-UHFFFAOYSA-N sodium peroxide Chemical compound [Na+].[Na+].[O-][O-] PFUVRDFDKPNGAV-UHFFFAOYSA-N 0.000 description 3
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 description 3
- 229940038773 trisodium citrate Drugs 0.000 description 3
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to the technical field of wet metallurgy and in particular relates to a method for extracting gold from pyrite. The method for extracting gold from pyrite is characterized in that the pyrite is pretreated so that gold in the pyrite is exposed from the crystal lattices of the pyrite, and therefore, the gold is capable of certainly reacting with hydrochloric acid and calcium hypochlorite and further dissolved in a solution in a leaching step, next, an alkaline anion resin solution is added to the solution so that the gold and platinum in the pyrite are adsorbed in the alkaline anion resin solution and then enriched, and consequently, the concentration of the gold is larger and larger and the technical problem of difficult extraction of the gold due to a low concentration is avoided, and therefore, the extraction rate of extracting the gold from the pyrite is increased, in addition, in particular in a separation step, thiourea is adopted to perform desorption on the gold and a reducing agent is added to perform reducing treatment on the gold so that the gold and the platinum can be separated out, and as a result, the extraction rate of the gold is further increased and the extraction cost of the gold is reduced.
Description
Technical field
The present invention relates to technical field of wet metallurgy, especially a kind of method extracting gold from pyrite.
Background technology
In the prior art, a lot of for Au plasma processing step, after catalyzed oxidation acid system pre-treatment gold ore, then to the technique that the gold in ore extracts; Gold extracting method by low-pressure hot acid immersing polyurethane foam is to Au plasma technique; Thiourea resin pulp process extracts the technique of gold.Although the gold in ore can extract by these techniques, also can cause the waste of a large amount of ore gold elements, cause Au plasma rate not high, waste is comparatively large, makes a large amount of golden resource losses; Meanwhile, in extraction process, be also faced with gold and be comprised in ore crystal lattice, and then be difficult to be soaked and depart from ore crystal lattice, cause Au plasma rate lower.For this reason, this investigator based on above-mentioned technical problem, to extracting the technical matters of gold and choosing of processing parameter and process liquid from pyrite, for the technique extracting gold from pyrite provides a kind of newly to select.
Summary of the invention
In order to solve the above-mentioned technical problem existed in prior art, the invention provides a kind of method extracting gold from pyrite, have pollution-free, especially the discharge of waste water and gas, carry out recycle to useless, make a small amount of gold by enrichment, improve in separating step, the content of gold, and then improve Au plasma rate, reduce the rate of loss of gold, reduce the feature of the cost that gold extracts.
Be achieved particular by following technical scheme:
From pyrite, extract a method for gold, comprise the following steps:
(1) pre-treatment: pyrite is placed in pulverizer and is crushed to 300-500 order, obtains pyritic ashes; Again the pyritic ashes pulverized is placed in pretreatment pool, and adds salpeter solution wherein, wherein the mass ratio of pyritic ashes and salpeter solution is 1:(1.5-2), and employing stirring speed is 200-300r/min stir process 30-50min; Add nitrite wherein again, the amount of its nitrite is 0.3-0.7 times of salpeter solution, and employing stirring speed is after 150-250r/min stir process 1-3h; Add superoxide wherein again, wherein the consumption of superoxide is 1-2 times of nitrite, after stirring reaction 2-3h, carry out press filtration process, pressure during press filtration is 3.7-4.9kg/m2, obtains filtrate and filter residue, wherein filtrate returns recycle in pretreatment pool, and filter residue is stand-by;
(2) Gold leaching: by step 1) filter residue that obtains is (2-4) with water according to mass ratio: (0.5-1.5) carries out mixing sizing mixing and processes, and add the hydrochloric acid that volumetric molar concentration is 3mol/l wherein, hydrochloric acid consumption is the 3-7% of slip gross weight, add Losantin wherein simultaneously, the consumption of Losantin is the 3-7% of slip gross weight, and to adjust temperature be 90-120 DEG C, employing stirring speed is that 120-170r/min carries out stir process, after question response 3-4h, obtain the whole liquid of slip, stand-by;
(3) enrichment: by step 2) obtain the whole liquid of slip and proceed in enrichment pond, add the whole liquid gross weight 1-2 of slip basic anionic resin solution doubly wherein, and employing stirring speed is 100-150r/min stir process, and solution temperature is controlled at 70-80 DEG C, after its reaction 20-30min, then carry out filtration treatment, obtain filtrate a and filter residue a, wherein filtrate a proceeds to step 1) middle recycle, filter residue a is stand-by;
(4) being separated: by step 3) the filter residue a that obtains proceeds to and resolves in groove, and to resolving the 1-1.5 times of thiourea solution adding basic anionic resin solution weight in groove, and temperature is controlled at 60-80 DEG C, employing stirring speed is 40-60r/min stir process 30-50min, add reductive agent wherein again, wherein the consumption of reductive agent is 0.9-1.1 times of thiourea solution, and to adjust stirring velocity be 100-120r/min, temperature is 60-70 DEG C, after stirring reaction 0.5-1h, can will extract bronze from pyrite, and namely complete and extract gold from pyrite.
The volumetric molar concentration of described salpeter solution is 0.3-2.5mol/l.
Described nitrite is both mixing a kind of or arbitrary in Sodium Nitrite, ammonium nitrite, inferior ammonium nitrate.
Described superoxide is the one in sodium peroxide and hydrogen peroxide.
Described Losantin is 100-130 object powder.
Described basic anionic resin solution is for containing-NR
3the volumetric molar concentration of OH is the solution of 3-4mol/l, and wherein R is hydrocarbon group.
Described-NR
3oH is-N (CH
3)
3oH.
The volumetric molar concentration of described thiourea solution is 2-3mol/l.
Described reductive agent is the one in white phosphorus, trisodium citrate.
Compared with prior art, technique effect of the present invention is embodied in:
1. by carrying out pre-treatment to pyrite, make to compose the gold existed in pyrite out exposed from pyritous crystal lattice, and then ensure that gold is in leaching step, can react with hydrochloric acid and Losantin, and then be dissolved in easily, basic anionic resin solution is added again in solution, the gold in pyrite and platinum is made to be attracted to basic anionic resin solution, and then reach the state of enrichment, make the concentration of gold increasing, avoid the technical barrier that lower concentration not easily extracts gold, thus improve extract Au plasma rate from pyrite, especially in separating step, thiocarbamide is adopted to carry out parsing and add reductive agent carrying out reduction treatment to gold to gold again, and then gold and platinum are separated, further increase Au plasma rate, reduce Au plasma cost.
2. in processing step of the present invention, for Au plasma non-pollutant discharge, the waste water of generation is recycled for pyritous pre-treatment step, further promotes the enrichment of gold and reduces the loss of gold, reducing the pollution to environment; Further, the technical process of this technique is short, extraction time is short, and then low to Au plasma cost, and the rate of loss of gold is low.
Embodiment
Below in conjunction with concrete embodiment, further restriction is done to technical scheme of the present invention, but claimed scope is not only confined to done description.
Embodiment 1
From pyrite, extract a method for gold, comprise the following steps:
(1) pre-treatment: pyrite is placed in pulverizer and is crushed to 300 orders, obtains pyritic ashes; Again the pyritic ashes pulverized is placed in pretreatment pool, and adds salpeter solution wherein, wherein the mass ratio of pyritic ashes and salpeter solution is 1:1.5, and employing stirring speed is 200r/min stir process 30min; Add nitrite wherein again, the amount of its nitrite is 0.3 times of salpeter solution, and employing stirring speed is after 150r/min stir process 1h; Add superoxide wherein again, wherein the consumption of superoxide is 1 times of nitrite, after stirring reaction 2h, carry out press filtration process, pressure during press filtration is 3.7kg/m2, obtains filtrate and filter residue, wherein filtrate returns recycle in pretreatment pool, and filter residue is stand-by;
(2) Gold leaching: by step 1) filter residue that obtains and water is that 2:0.5 carries out mixing sizing mixing and processes according to mass ratio, and add the hydrochloric acid that volumetric molar concentration is 3mol/l wherein, hydrochloric acid consumption is 3% of slip gross weight, simultaneously add Losantin wherein, the consumption of Losantin is 3% of slip gross weight, and to adjust temperature be 90 DEG C, employing stirring speed is that 120r/min carries out stir process, after question response 3h, obtain the whole liquid of slip, stand-by;
(3) enrichment: by step 2) obtain the whole liquid of slip and proceed in enrichment pond, add the basic anionic resin solution of the whole liquid gross weight 1 times of slip wherein, and employing stirring speed is 100r/min stir process, and solution temperature is controlled at 70 DEG C, after its reaction 20min, then carry out filtration treatment, obtain filtrate a and filter residue a, wherein filtrate a proceeds to step 1) middle recycle, filter residue a is stand-by;
(4) being separated: by step 3) the filter residue a that obtains proceeds to and resolves in groove, and to resolving the 1 times of thiourea solution adding basic anionic resin solution weight in groove, and temperature is controlled at 60 DEG C, employing stirring speed is 40r/min stir process 30min, add reductive agent wherein again, wherein the consumption of reductive agent is 0.9 times of thiourea solution, and to adjust stirring velocity be 100r/min, temperature is 60 DEG C, after stirring reaction 0.5h, can will extract bronze from pyrite, and namely complete and extract gold from pyrite.
The volumetric molar concentration of described salpeter solution is 0.3mol/l.
Described nitrite is Sodium Nitrite.
Described superoxide is sodium peroxide.
Described Losantin is 100 object powder.
Described basic anionic resin solution is the volumetric molar concentration containing-NR3OH is the solution of 3mol/l, and wherein R is hydrocarbon group.
Described-NR3OH is-N (CH3) 3OH.
The volumetric molar concentration of described thiourea solution is 2mol/l.
Described reductive agent is white phosphorus.
Embodiment 2
From pyrite, extract a method for gold, comprise the following steps:
(1) pre-treatment: pyrite is placed in pulverizer and is crushed to 500 orders, obtains pyritic ashes; Again the pyritic ashes pulverized is placed in pretreatment pool, and adds salpeter solution wherein, wherein the mass ratio of pyritic ashes and salpeter solution is 1:2, and employing stirring speed is 300r/min stir process 50min; Add nitrite wherein again, the amount of its nitrite is 0.7 times of salpeter solution, and employing stirring speed is after 250r/min stir process 3h; Add superoxide wherein again, wherein the consumption of superoxide is 2 times of nitrite, after stirring reaction 3h, carry out press filtration process, pressure during press filtration is 4.9kg/m2, obtains filtrate and filter residue, wherein filtrate returns recycle in pretreatment pool, and filter residue is stand-by;
(2) Gold leaching: by step 1) filter residue that obtains and water is that 4:1.5 carries out mixing sizing mixing and processes according to mass ratio, and add the hydrochloric acid that volumetric molar concentration is 3mol/l wherein, hydrochloric acid consumption is 7% of slip gross weight, simultaneously add Losantin wherein, the consumption of Losantin is 7% of slip gross weight, and to adjust temperature be 120 DEG C, employing stirring speed is that 170r/min carries out stir process, after question response 4h, obtain the whole liquid of slip, stand-by;
(3) enrichment: by step 2) obtain the whole liquid of slip and proceed in enrichment pond, add the basic anionic resin solution of the whole liquid gross weight 2 times of slip wherein, and employing stirring speed is 150r/min stir process, and solution temperature is controlled at 80 DEG C, after its reaction 30min, then carry out filtration treatment, obtain filtrate a and filter residue a, wherein filtrate a proceeds to step 1) middle recycle, filter residue a is stand-by;
(4) being separated: by step 3) the filter residue a that obtains proceeds to and resolves in groove, and to resolving the 1.5 times of thiourea solutions adding basic anionic resin solution weight in groove, and temperature is controlled at 80 DEG C, employing stirring speed is 60r/min stir process 50min, add reductive agent wherein again, wherein the consumption of reductive agent is 1.1 times of thiourea solution, and to adjust stirring velocity be 120r/min, temperature is 70 DEG C, after stirring reaction 1h, can will extract bronze from pyrite, and namely complete and extract gold from pyrite.
The volumetric molar concentration of described salpeter solution is 2.5mol/l.
Described nitrite is ammonium nitrite.
Described superoxide is hydrogen peroxide.
Described Losantin is 130 object powder.
Described basic anionic resin solution is the volumetric molar concentration containing-NR3OH is the solution of 4mol/l, and wherein R is hydrocarbon group.
Described-NR3OH is-N (CH3) 3OH.
The volumetric molar concentration of described thiourea solution is 3mol/l.
Described reductive agent is trisodium citrate.
Embodiment 3
From pyrite, extract a method for gold, comprise the following steps:
(1) pre-treatment: pyrite is placed in pulverizer and is crushed to 400 orders, obtains pyritic ashes; Again the pyritic ashes pulverized is placed in pretreatment pool, and adds salpeter solution wherein, wherein the mass ratio of pyritic ashes and salpeter solution is 1:1.8, and employing stirring speed is 250r/min stir process 40min; Add nitrite wherein again, the amount of its nitrite is 0.5 times of salpeter solution, and employing stirring speed is after 200r/min stir process 2h; Add superoxide wherein again, wherein the consumption of superoxide is 1.5 times of nitrite, after stirring reaction 2.5h, carry out press filtration process, pressure during press filtration is 4.3kg/m2, obtains filtrate and filter residue, wherein filtrate returns recycle in pretreatment pool, and filter residue is stand-by;
(2) Gold leaching: by step 1) filter residue that obtains and water is that 3:1 carries out mixing sizing mixing and processes according to mass ratio, and add the hydrochloric acid that volumetric molar concentration is 3mol/l wherein, hydrochloric acid consumption is 5% of slip gross weight, simultaneously add Losantin wherein, the consumption of Losantin is 6% of slip gross weight, and to adjust temperature be 105 DEG C, employing stirring speed is that 155r/min carries out stir process, after question response 3.5h, obtain the whole liquid of slip, stand-by;
(3) enrichment: by step 2) obtain the whole liquid of slip and proceed in enrichment pond, add the basic anionic resin solution of the whole liquid gross weight 1.5 times of slip wherein, and employing stirring speed is 125r/min stir process, and solution temperature is controlled at 75 DEG C, after its reaction 25min, then carry out filtration treatment, obtain filtrate a and filter residue a, wherein filtrate a proceeds to step 1) middle recycle, filter residue a is stand-by;
(4) being separated: by step 3) the filter residue a that obtains proceeds to and resolves in groove, and to resolving the 1.3 times of thiourea solutions adding basic anionic resin solution weight in groove, and temperature is controlled at 70 DEG C, employing stirring speed is 50r/min stir process 40min, add reductive agent wherein again, wherein the consumption of reductive agent is 1 times of thiourea solution, and to adjust stirring velocity be 110r/min, temperature is 65 DEG C, after stirring reaction 0.8h, can will extract bronze from pyrite, and namely complete and extract gold from pyrite.
The volumetric molar concentration of described salpeter solution is 1.7mol/l.
Described nitrite is Sodium Nitrite, the mixing of ammonium nitrite equal proportion.
Described superoxide is sodium peroxide.
Described Losantin is 115 object powder.
Described basic anionic resin solution is the volumetric molar concentration containing-NR3OH is the solution of 3.5mol/l, and wherein R is hydrocarbon group.
Described-NR3OH is-N (CH3) 3OH.
The volumetric molar concentration of described thiourea solution is 2.5mol/l.
Described reductive agent is white phosphorus.
Embodiment 4
From pyrite, extract a method for gold, comprise the following steps:
(1) pre-treatment: pyrite is placed in pulverizer and is crushed to 370 orders, obtains pyritic ashes; Again the pyritic ashes pulverized is placed in pretreatment pool, and adds salpeter solution wherein, wherein the mass ratio of pyritic ashes and salpeter solution is 1:1.9, and employing stirring speed is 230r/min stir process 35min; Add nitrite wherein again, the amount of its nitrite is 0.6 times of salpeter solution, and employing stirring speed is after 230r/min stir process 2.5h; Add superoxide wherein again, wherein the consumption of superoxide is 1.7 times of nitrite, after stirring reaction 2.3h, carry out press filtration process, pressure during press filtration is 3.9kg/m2, obtains filtrate and filter residue, wherein filtrate returns recycle in pretreatment pool, and filter residue is stand-by;
(2) Gold leaching: by step 1) filter residue that obtains and water is that 3.5:1 carries out mixing sizing mixing and processes according to mass ratio, and add the hydrochloric acid that volumetric molar concentration is 3mol/l wherein, hydrochloric acid consumption is 4% of slip gross weight, simultaneously add Losantin wherein, the consumption of Losantin is 5% of slip gross weight, and to adjust temperature be 100 DEG C, employing stirring speed is that 143r/min carries out stir process, after question response 3.7h, obtain the whole liquid of slip, stand-by;
(3) enrichment: by step 2) obtain the whole liquid of slip and proceed in enrichment pond, add the basic anionic resin solution of the whole liquid gross weight 1.9 times of slip wherein, and employing stirring speed is 145r/min stir process, and solution temperature is controlled at 77 DEG C, after its reaction 29min, then carry out filtration treatment, obtain filtrate a and filter residue a, wherein filtrate a proceeds to step 1) middle recycle, filter residue a is stand-by;
(4) being separated: by step 3) the filter residue a that obtains proceeds to and resolves in groove, and to resolving the 1.1 times of thiourea solutions adding basic anionic resin solution weight in groove, and temperature is controlled at 73 DEG C, employing stirring speed is 59r/min stir process 48min, add reductive agent wherein again, wherein the consumption of reductive agent is 1.1 times of thiourea solution, and to adjust stirring velocity be 118r/min, temperature is 63 DEG C, after stirring reaction 0.7h, can will extract bronze from pyrite, and namely complete and extract gold from pyrite.
The volumetric molar concentration of described salpeter solution is 1.3mol/l.
Described nitrite is ammonium nitrite, the mixing of inferior ammonium nitrate equal proportion.
Described superoxide is hydrogen peroxide.
Described Losantin is 117 object powder.
Described basic anionic resin solution is the volumetric molar concentration containing-NR3OH is the solution of 3.9mol/l, and wherein R is hydrocarbon group.
Described-NR3OH is-N (CH3) 3OH.
The volumetric molar concentration of described thiourea solution is 2.1mol/l.
Described reductive agent is trisodium citrate.
Claims (9)
1. from pyrite, extract a method for gold, it is characterized in that, comprise the following steps:
(1) pre-treatment: pyrite is placed in pulverizer and is crushed to 300-500 order, obtains pyritic ashes; Again the pyritic ashes pulverized is placed in pretreatment pool, and adds salpeter solution wherein, wherein the mass ratio of pyritic ashes and salpeter solution is 1:(1.5-2), and employing stirring speed is 200-300r/min stir process 30-50min; Add nitrite wherein again, the amount of its nitrite is 0.3-0.7 times of salpeter solution, and employing stirring speed is after 150-250r/min stir process 1-3h; Add superoxide wherein again, wherein the consumption of superoxide is 1-2 times of nitrite, after stirring reaction 2-3h, carry out press filtration process, pressure during press filtration is 3.7-4.9kg/m2, obtains filtrate and filter residue, wherein filtrate returns recycle in pretreatment pool, and filter residue is stand-by;
(2) Gold leaching: by step 1) filter residue that obtains is (2-4) with water according to mass ratio: (0.5-1.5) carries out mixing sizing mixing and processes, and add the hydrochloric acid that volumetric molar concentration is 3mol/l wherein, hydrochloric acid consumption is the 3-7% of slip gross weight, add Losantin wherein simultaneously, the consumption of Losantin is the 3-7% of slip gross weight, and to adjust temperature be 90-120 DEG C, employing stirring speed is that 120-170r/min carries out stir process, after question response 3-4h, obtain the whole liquid of slip, stand-by;
(3) enrichment: by step 2) obtain the whole liquid of slip and proceed in enrichment pond, add the whole liquid gross weight 1-2 of slip basic anionic resin solution doubly wherein, and employing stirring speed is 100-150r/min stir process, and solution temperature is controlled at 70-80 DEG C, after its reaction 20-30min, then carry out filtration treatment, obtain filtrate a and filter residue a, wherein filtrate a proceeds to step 1) middle recycle, filter residue a is stand-by;
(4) being separated: by step 3) the filter residue a that obtains proceeds to and resolves in groove, and to resolving the 1-1.5 times of thiourea solution adding basic anionic resin solution weight in groove, and temperature is controlled at 60-80 DEG C, employing stirring speed is 40-60r/min stir process 30-50min, add reductive agent wherein again, wherein the consumption of reductive agent is 0.9-1.1 times of thiourea solution, and to adjust stirring velocity be 100-120r/min, temperature is 60-70 DEG C, after stirring reaction 0.5-1h, can will extract bronze from pyrite, and namely complete and extract gold from pyrite.
2. from pyrite, extract the method for gold as claimed in claim 1, it is characterized in that, the volumetric molar concentration of described salpeter solution is 0.3-2.5mol/l.
3. from pyrite, extract as claimed in claim 1 the method for gold, it is characterized in that, described nitrite is both mixing a kind of or arbitrary in Sodium Nitrite, ammonium nitrite, inferior ammonium nitrate.
4. from pyrite, extract as claimed in claim 1 the method for gold, it is characterized in that, described superoxide is the one in sodium peroxide and hydrogen peroxide.
5. from pyrite, extract the method for gold as claimed in claim 1, it is characterized in that, described Losantin is 100-130 object powder.
6. from pyrite, extract the method for gold as claimed in claim 1, it is characterized in that, described basic anionic resin solution is for containing-NR
3the volumetric molar concentration of OH is the solution of 3-4mol/l, and wherein R is hydrocarbon group.
7. from pyrite, extract the method for gold as claimed in claim 6, it is characterized in that, described-NR
3oH is-N (CH
3)
3oH.
8. from pyrite, extract the method for gold as claimed in claim 1, it is characterized in that, the volumetric molar concentration of described thiourea solution is 2-3mol/l.
9. from pyrite, extract the method for gold as claimed in claim 1, it is characterized in that, described reductive agent is the one in white phosphorus, trisodium citrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410490074.8A CN104263961B (en) | 2014-09-23 | 2014-09-23 | A kind of method extracting gold from pyrite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410490074.8A CN104263961B (en) | 2014-09-23 | 2014-09-23 | A kind of method extracting gold from pyrite |
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| CN106167853A (en) * | 2016-08-24 | 2016-11-30 | 铜仁市万山区盛和矿业有限责任公司 | A kind of ultrasonic extraction process of gold |
| CN106319239A (en) * | 2016-08-24 | 2017-01-11 | 铜仁市万山区盛和矿业有限责任公司 | Method for extracting arsenopyrite |
| CN106350670A (en) * | 2016-08-24 | 2017-01-25 | 铜仁市万山区盛和矿业有限责任公司 | Treatment process of pyrrhotite |
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| CN105181783A (en) * | 2015-10-10 | 2015-12-23 | 河南省岩石矿物测试中心 | Platinum-palladium metallographic analysis method in dolomite and quartzite type platinum group ore deposit |
| CN105181783B (en) * | 2015-10-10 | 2018-12-21 | 河南省岩石矿物测试中心 | Platinum-palladium metallographic analysis method in dolomite and quartzite type platinum group ore deposit |
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| CN106167853A (en) * | 2016-08-24 | 2016-11-30 | 铜仁市万山区盛和矿业有限责任公司 | A kind of ultrasonic extraction process of gold |
| CN106319239A (en) * | 2016-08-24 | 2017-01-11 | 铜仁市万山区盛和矿业有限责任公司 | Method for extracting arsenopyrite |
| CN106350670A (en) * | 2016-08-24 | 2017-01-25 | 铜仁市万山区盛和矿业有限责任公司 | Treatment process of pyrrhotite |
| CN106319239B (en) * | 2016-08-24 | 2018-06-29 | 铜仁市万山区盛和矿业有限责任公司 | A kind of extracting method of arsenical pyrite |
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