CN108950200A - A method of it carrying golden high arsenic-and copper-bearing concentrate dearsenification and recycles associated gold - Google Patents
A method of it carrying golden high arsenic-and copper-bearing concentrate dearsenification and recycles associated gold Download PDFInfo
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- CN108950200A CN108950200A CN201810953645.5A CN201810953645A CN108950200A CN 108950200 A CN108950200 A CN 108950200A CN 201810953645 A CN201810953645 A CN 201810953645A CN 108950200 A CN108950200 A CN 108950200A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/12—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0065—Leaching or slurrying
- C22B15/008—Leaching or slurrying with non-acid solutions containing salts of alkali or alkaline earth metals
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0084—Treating solutions
- C22B15/0086—Treating solutions by physical methods
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0084—Treating solutions
- C22B15/0089—Treating solutions by chemical methods
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical processes
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- 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
Abstract
The present invention relates to a kind of methods for carrying golden high arsenic-and copper-bearing concentrate dearsenification recycling associated gold, successively use: leaching under certain process conditions, and sodium hydroxide, vulcanized sodium or sodium hydrosulfide is added to the golden high arsenic-and copper-bearing concentrate of load and sizes mixing；It is separated by solid-liquid separation, carries out pressurization dearsenification after adding slurry into autoclave；Dearsenification ore pulp addition vacuum band-type filter machine is filtered, washs by washing, and qualified copper concentrate mentions copper toward smeltery；Cleaning solution and the part stoste of high concentration containing arsenic are mixed, control NaOH concentration by precipitate reduction, thiourea dioxide is added and carries out reduction reaction, slurry after reaction is filtered washing, obtains arsenic containing solution and gold-containing residue that gold concentration is lower than 0.05mg/L, and gold-containing residue mentions gold toward smeltery.It has many advantages, such as that the separation of high-efficiency copper arsenic, the comprehensive recovery height of associated gold, the treatment of wastes with processes of wastes against one another, arsenic are environmentally friendly with stable form presence, wet method dearsenication, is suitable for metallurgy industry application.
Description
Technical field
The present invention relates to a kind of methods for carrying golden high arsenic-and copper-bearing concentrate dearsenification recycling associated gold, are suitable for metallurgy industry application.
Background technique
Copper belongs to national strategy resource, and consequence is occupied in national economy.According to statistics, the whole world is more than 70%
Refined copper is produced by pyrometallurgical smelting process.But the copper concentrate containing 15 race's elements (As, Sb, Bi) is for pyrogenic process
Smelting process is still a major challenge.Arsenic belongs to sulphophile element, it is known that arsenic-containing ores up to more than 300 kinds, mostly with sulfide
Form be mixed in gold, copper, lead, zinc, tin, nickel, in cobalt ore.In the world in 15% copper ore resource, As/Cu mass ratio is up to 1/5, i.e.,
Exploit the arsenic that 1 ton of copper accordingly takes 0.2 ton or more out of.Totally with the exploitation of easy to handle copper ore resource, containing the difficult copper mine money such as arsenic
Source has become primary raw material source.But copper-sulphide ores (covellite, vitreous copper, Huang of arsenic-containing ores enargite etc. and its association
Copper mine etc.) surface nature is similar, and washability is also very close to, thus in conventional flotation flowsheet, Copper ore containing arsenic can not be kept away
Exempt from as other copper minerals are into people's concentrate, cause copper concentrate arsenic grade exceeded.High arsenic-and copper-bearing concentrate can be generated in roasting process
A large amount of arsenic-containing smoke dust needs expensive dust treatment system to handle；The toxicity such as the arsenic-containing material arsenic of generation, arsenic filter cake
By force, purposes is narrow, dosage is small, soluble easily in water；Meanwhile metal copper weld pool solidification process, since there are arsenic, in copper metal crystal edge
Arsenic compound is formed, causes the mechanical strength of metallic copper low, and form crack in process, reduces its electric conductivity.
In addition to individual pyrometallurgical smelting factories, most smelteries require copper concentrate to must not exceed 0.5% containing arsenic, or even must not exceed
0.3%.
To solve the above problems, 105132671 A of Chinese patent CN discloses a kind of " copper concentrate high temperature pyrogenic process dearsenicating technology
And device ", it is added under nitrogen atmosphere between 400-600 DEG C by the way that the copper concentrate ground after drying to be put into rotary kiln
Heat, arsenic element and the distillation of low-melting element are the gaseous mixture containing gas arsenic, will be pure after the impurity of disintegrate-quality weight
The gaseous gaseous mixture containing gas arsenic is precipitated by cooling coagulating sedimentation processing and extracts arsenic element, and nitrogen will be by being back to nitrogen
It is recycled in gas generator, but that there are operating environment temperature is high, is discharged into air, arsenic containing arsenic gas also needs further stabilization
The problems such as changing and be innoxious；03117196.6 disclosure of Chinese patent CN " hydrometallurgy of copper sulfide concentrate containing arsenic new process " invention
A kind of using the sodium chloride for containing bivalent cupric ion or calcium chloride solution as leaching agent, copper concentrate is leached in pressure oxidation, realizes
To the oxidized of copper concentrate, technical characterstic is utilized under the conditions of high temperature, high pressure, high copper ion concentration, high Cl- concentration
Dioxygen oxidation copper concentrate, obtains the leachate of copper ion and the phase analysis of sulfur-bearing, arsenic, but the technique is there are temperature height, in strong acid and
It is also high to the material requirement of autoclave under high Cl- concentration environment, while the elementary sulfur generated can wrap up copper concentrate, cause oxygen
The problems such as change is not thorough；Chinese patent CN106460089A is disclosed " recycles copper from the copper sulfide concentrate containing arsenic and/or containing antimony
Method ", it is copper sulfide mineral progress pressure oxidation in the presence of surfactant and halogen to Ultrafine Grinding containing arsenic and containing antimony,
The oxidized process of wet process under a kind of high temperature, high pressure, high halogen ion concentration is also belonged to, but equally exists the material to autoclave
It is required that the problems such as high；104117433 A of Chinese patent CN, which is disclosed, " chooses copper concentrate in a kind of copper mine high from sulphur arsenic content
Method ", it is to inhibit pyrite, Two stage preferential flotation copper mineral, finally the selectively removing enargite in copper concentrate, the party
Method realizes the flotation with enargite according to the surface chemistry antioxygenic property difference of mineral, selective oxidation mineral and degree
Separation obtains qualified copper concentrate, but this method does not refer to how carrying out effectively to the high arsenic-and copper-bearing concentrate that FLOTATION SEPARATION obtains
Processing；102373337 A of Chinese patent CN discloses " a kind of Treatment of Copper, the technique of arsenic processing complex gold ore ", with gravity treatment-flotation-
Cyanide Leaching-arsenic concentrate roasts combined process flow Treatment of Copper, arsenic processing complex gold ore, is to high arsenic as traditional roasting technique
Concentrate roasting generates arsenic, so high in the presence of requiring environment-friendly disposal system, operating environment is comparatively severe, while generating
There is still a need for carry out harmless treatment to arsenic；105506303 A of Chinese patent CN discloses " a kind of from horsfordite containing arsenic
The method of middle separation arsenic, antimony ", the copper mine containing arsenic, antimony is mixed with catalyst and additive, is placed in closed vacuum environment condition
Lower heating pyrolytic semlting brings it about chemical reaction, and arsenic and antimony are separated with copper in a gaseous form, can get containing arsenic less than 0.3%
Copper concentrate, sulfur-bearing and arsenic greater than 80% arsenic concentrate and containing antimony be greater than 45% antimony fine powder, but this method there are arsenic concentrates still
So to continue harmless treatment, store up the deficiencies of dangerous；105463210 A of Chinese patent CN discloses a kind of " high impurity copper essence
The smelting process of mine ", in the local by lead impurity element, zinc, arsenic, antimony, bismuth and tin of the source near entire Copper making process
It is removed away from entire Copper making process, but basically from it, is still a kind of high-temperature roasting mode.
Arsenic in a kind of environmentally friendly, pre-selecting property removing high arsenic-and copper-bearing concentrate is researched and developed thus and recycles its associated gold
The method for carrying golden high arsenic-and copper-bearing concentrate dearsenification recycling associated gold just seems especially urgent.
Summary of the invention
The task of the present invention is for overcome the deficiencies in the prior art, provide a kind of golden high arsenic-and copper-bearing concentrate dearsenification recycling companion of load
The method of raw gold can not only realize that copper arsenic separated, but also its associated gold can be recycled, also environmentally friendly.
The task of the present invention is by the following technical programs to complete:
A method of it carrying golden high arsenic-and copper-bearing concentrate dearsenification and recycles associated gold, successively carried out as follows with condition:
(A) it leaches, sodium hydroxide, vulcanization is added in the load gold high arsenic-and copper-bearing concentrate that -37 μm obtained to flotation account for 80% or more
Sodium or sodium hydrosulfide are sized mixing, and the concentration for being adjusted to sodium hydroxide is 30~120g/L, S2-Concentration be 10~26g/L,
Obtain the slurry that concentration is 15~45wt.%；
(B) it is separated by solid-liquid separation a, pressurization dearsenification is carried out after autoclave is added in the slurry that above-mentioned concentration is 15~45wt.%, controls
Reaction temperature processed is 120~200 DEG C, and reaction pressure is 0.10~1.56MPa, and the reaction time is 0.5~3h, and stirring linear velocity is
2.0~4.0m/s obtains the stoste of high concentration containing arsenic and dearsenification ore pulp；
(C) it washs, above-mentioned dearsenification ore pulp addition vacuum band-type filter machine is filtered, is washed, control vacuum degree is
0.03~0.06MPa, wash water hydraulic pressure are greater than 0.3MPa, wash water ratio is 0.61~0.63, obtain the conjunction that arsenic content is lower than 0.05wt.%
Lattice copper concentrate and cleaning solution, qualified copper concentrate mention copper toward smeltery；
(D) precipitate reduction mixes above-mentioned cleaning solution and the part stoste of high concentration containing arsenic, control NaOH concentration 50~
100g/L, be added thiourea dioxide carry out reduction reaction, control reduction reaction temperature be 60~80 DEG C, the reaction time 10~
40min, sulfur dioxide 0.3~1.0g/L of urea concentration, the slurry after reaction are filtered washing, obtain gold concentration and be lower than
The arsenic containing solution and gold-containing residue of 0.05mg/L, gold-containing residue mention gold toward smeltery.
Percentage involved in specification is mass percent, and the golden high arsenic-and copper-bearing concentrate of load used is black with enargite, arsenic
The arsenic-containing ores such as copper mine are that representative usually contains Au grade greater than 2g/t, As content in 0.5~15wt.%, S content 35~
45wt.%, Cu content are in 20~40wt.%.
Compared with the prior art, the present invention has the following advantages and effect:
(1) high-efficiency copper arsenic separates, and down to 0.01%, copper is all retained in the copper concentrate after dearsenification arsenic grade after processing.
(2) comprehensive recovery of associated gold is up to 95% or more simultaneously, acts on the principle of " early receive then is received " of gold, realizes
Mine benefit.
(3) " treatment of wastes with processes of wastes against one another " makes full use of the component in two kinds of waste water, realizes the high-efficiency comprehensive utilization of resource, realizes simultaneously
The minimizing of slag.
(4) arsenic exists in stable form, and can reduce arsenic in transport and smelting process in mine safety stockpiling in situ
Bring potential environmental pollution risk.
(5) wet method dearsenication avoids the discharge of the subtle exhaust gas containing arsenic in pyrometallurgical smelting, environmentally friendly.
Detailed description of the invention
Fig. 1 is a kind of method and process process of the load gold high arsenic-and copper-bearing concentrate dearsenification recycling associated gold proposed according to the present invention
Figure.
Respectively mark respectively indicates in attached drawing:
1. it is qualified to carry golden 2. 3. vulcanized sodium of sodium hydroxide of high arsenic-and copper-bearing concentrate/4. stoste of high concentration containing arsenic of NaHS 5.
10. overflowing liquid of copper concentrate 6. thiourea dioxide, 7. gold-containing residue, 8. iron content acid waste water, 9. milk of lime, 11. underflow
Explanation is described in further detail below in conjunction with attached drawing.
Specific embodiment
As shown in Figure 1, a kind of method of load gold high arsenic-and copper-bearing concentrate dearsenification recycling associated gold of the invention, successively by following step
Rapid and condition carries out:
(A) it leaches, sodium hydroxide 2, sulphur is added in the load gold high arsenic-and copper-bearing concentrate 1 that -37 μm obtained to flotation account for 80% or more
Change sodium or 3 solution of NaHS is sized mixing, the concentration for being adjusted to sodium hydroxide is 30~120g/L, S2-Concentration be 10~26g/
L obtains the slurry that concentration is 15~45wt.%；
(B) it is separated by solid-liquid separation a, pressurization dearsenification is carried out after autoclave is added in the slurry that above-mentioned concentration is 15~45wt.%, controls
Reaction temperature processed is 120~200 DEG C, and reaction pressure is 0.10~1.56MPa, and the reaction time is 0.5~3h, and stirring linear velocity is
2.0~4.0m/s obtains the stoste of high concentration containing arsenic 4 and dearsenification ore pulp；
(C) it washs, above-mentioned dearsenification ore pulp addition vacuum band-type filter machine is filtered, is washed, control vacuum degree is
0.03~0.06MPa, wash water hydraulic pressure are greater than 0.3MPa, wash water ratio is 0.61~0.63, obtain the conjunction that arsenic content is lower than 0.05wt.%
Lattice copper concentrate 5 and cleaning solution, qualified copper concentrate 5 mention copper toward smeltery；
(D) precipitate reduction mixes above-mentioned cleaning solution and part high concentration containing arsenic stoste 4, control NaOH concentration 50~
100g/L, be added thiourea dioxide carry out reduction reaction, control reduction reaction temperature be 60~80 DEG C, the reaction time 10~
40min, sulfur dioxide 0.3~1.0g/L of urea concentration, the slurry after reaction are filtered washing, obtain gold concentration and be lower than
The arsenic containing solution and gold-containing residue 7 of 0.05mg/L, gold-containing residue 7 mention gold toward smeltery.
Technique of the invention may furthermore is that:
The gold concentration of step described in the step (D) precipitate reduction is lower than the arsenic containing solution of 0.05mg/L and containing iron ore mine acid
Property waste water carry out aeration neutralization, control air capacity is 50~150m3/ h adjusts pH to 7~9 with 30% milk of lime, wherein iron content
Acid wastewater in mine pH is that 1.2~1.8, Fe ion concentration is 5~15g/L, control arsenic containing solution and iron content acid wastewater in mine
Ratio make Fe/As mass ratio be greater than 5, must be aerated neutralization arsenic containing solution.
The arsenic containing solution that the aeration neutralizes carries out separation of solid and liquid b, and isolated slurry carries out dense processing, obtains overflowing liquid 10
With underflow 11, underflow 11, which is pumped to, neutralizes the stockpiling of slag library.
A part of return step A of the overflowing liquid 10 leaches cycle and utilizes, qualified discharge after another part can be handled.
The step (B), which is separated by solid-liquid separation obtained another part high concentration containing arsenic stoste 4 and separation of solid and liquid b is dense, to be handled
To a part of overflowing liquid 10 mix return step (A) and leach as sizing mixing and recycled with solution, another part is sent to step (D)
Precipitate reduction uses.
The specific embodiment of the invention is further illustrated combined with specific embodiments below.
Embodiment 1
To carry golden high arsenic-and copper-bearing concentrate (Au 2g/t, As 0.5wt.%, S 35wt.%, Cu 20wt.%) size mixing to
Pulp density is 15wt.%；NaOH, Na are added in above-mentioned ore pulp2The concentration of S or NaHS to wherein NaOH is 30g/L, S2-'s
Concentration is 10g/L, and ore pulp is then squeezed into autoclave, is pressurizeed in the case where 120 DEG C, 0.50MPa, stirring linear velocity is 2.0m/s
Dearsenification leaching gold；Pressurization dearsenification leaching gold mine slurry is filtered, washed after screw pump is discharged or flashes, and obtaining arsenic grade is
0.05%, gold grade is qualified copper concentrate, high concentration arsenic leaching solution and the cleaning solution of 0.1g/t, and qualified copper concentrate is toward smeltery
For pyrometallurgical smelting；Above-mentioned part high concentration arsenic leaching solution is mixed with cleaning solution, gold concentration is controlled in 5mg/L, uses dioxy
Change thiocarbamide and carry out reduction recycling gold, reaction temperature is 60 DEG C, solution NaOH concentration degree 50g/L, sulfur dioxide urea concentration 0.3g/
L, reaction time about 40min, GOLD FROM PLATING SOLUTION concentration are lower than 0.05mg/L, stop reaction, reaction is obtained slurry are filtered to wash
It washs, gold-containing residue is purified toward smeltery；Arsenic containing solution after above-mentioned recycling gold is mixed with iron content acid wastewater in mine, is exposed
Then gas adjusts pH to 7~9 with lime, wherein iron content acid wastewater in mine pH is 1.2, Fe ion concentration in 7g/L, and control contains
The ratio of arsenic solution and iron content acid wastewater in mine makes Fe/As mass ratio 6；Above-mentioned reaction slurry is subjected to dense solid-liquid point
From, obtain neutralizing slag underflow and overflowing liquid, underflow, which is pumped to, neutralizes the stockpiling of slag library, overflowing liquid detected it is up to standard it is qualified after it is most of
Discharge；The above-mentioned overflowing liquid in part is obtained high concentration arsenic leaching solution with step (C) to mix, return step (A) is for carrying gold
High arsenic-and copper-bearing concentrate is sized mixing.
Embodiment 2
To carry golden high arsenic-and copper-bearing concentrate (Au 10g/t, As 15wt.%, S 35wt.%, Cu 20wt.%) size mixing to
Pulp density is 15wt.%；NaOH, Na are added in above-mentioned ore pulp2The concentration of S or NaHS to wherein NaOH is 100g/L, S2-
Concentration be 32g/L, ore pulp is then squeezed into autoclave, 200 DEG C, 1.55MPa, stirring linear velocity be 2.0m/s under added
Pressure-off arsenic leaching gold；Pressurization dearsenification leaching gold mine slurry is filtered, washed after flashing, and obtains that arsenic grade is 0.04%, gold grade is
Qualified copper concentrate, high concentration arsenic leaching solution and the cleaning solution of 2g/t, qualified copper concentrate are used for pyrometallurgical smelting toward smeltery；It will be upper
It states part high concentration arsenic leaching solution to mix with cleaning solution, controls gold concentration in 8mg/L, carry out reduction recycling with thiourea dioxide
Gold, reaction temperature are 80 DEG C, solution basicity 100g/L, thiourea dioxide dosage 1.0g/L, reaction time about 20min, solution
Middle gold concentration is lower than 0.05mg/L, stops reaction, reaction is obtained slurry and is filtered washing, gold-containing residue is mentioned toward smeltery
It is pure；Arsenic containing solution after above-mentioned recycling gold is mixed with iron content acid wastewater in mine, is aerated, then with lime adjusting pH to
7~9, wherein iron content acid wastewater in mine pH is 1.1, Fe ion concentration in 15g/L, controls arsenic containing solution and contains iron ore mine acidity
The ratio of waste water makes Fe/As mass ratio 7；Above-mentioned reaction slurry is subjected to dense separation of solid and liquid, obtain neutralizing slag underflow and is overflow
Flow liquid, underflow, which is pumped to, neutralizes the stockpiling of slag library, and overflowing liquid largely discharges the overflow that part is above-mentioned after being detected qualification up to standard
Liquid obtains high concentration arsenic leaching solution with step (C) and mixes, and return step (A) is sized mixing for carrying golden high arsenic-and copper-bearing concentrate.
As described above, the present invention can be better realized.Above-described embodiment is only the optimal embodiment of the present invention, but this
The embodiment of invention is simultaneously not restricted to the described embodiments, what other were done without departing from the spirit and principles of the present invention
Change, modification, replacement, combination, simplify, should be equivalent substitute mode, be included in protection scope of the present invention.
Claims (5)
1. a kind of method for carrying golden high arsenic-and copper-bearing concentrate dearsenification recycling associated gold, it is characterised in that successively press following processing step and item
Part carries out:
(A) it leaches, sodium hydroxide (2), sulphur are added in the load gold high arsenic-and copper-bearing concentrate (1) that -37 μm obtained to flotation account for 80% or more
Change sodium or NaHS (3) solution is sized mixing, the concentration for being adjusted to sodium hydroxide is 30~120g/L, S2-Concentration be 10~
26g/L obtains the slurry that concentration is 15~45wt.%；
(B) it is separated by solid-liquid separation a, the slurry that above-mentioned concentration is 15~45wt.% is added after autoclave and carries out pressurization dearsenification, control is anti-
Answering temperature is 120~200 DEG C, and reaction pressure is 0.10~1.56MPa, and the reaction time is 0.5~3h, and stirring linear velocity is 2.0
~4.0m/s obtains the stoste of high concentration containing arsenic (4) and dearsenification ore pulp；
(C) it washs, above-mentioned dearsenification ore pulp addition vacuum band-type filter machine is filtered, washs, control vacuum degree is 0.03~
0.06MPa, wash water hydraulic pressure are greater than 0.3MPa, wash water ratio is 0.61~0.63, obtain qualified copper essence of the arsenic content lower than 0.05wt.%
Mine (5) and cleaning solution, qualified copper concentrate (5) mention copper toward smeltery；
(D) precipitate reduction mixes above-mentioned cleaning solution and the part stoste of high concentration containing arsenic (4), control NaOH concentration 50~
100g/L, be added thiourea dioxide carry out reduction reaction, control reduction reaction temperature be 60~80 DEG C, the reaction time 10~
40min, sulfur dioxide 0.3~1.0g/L of urea concentration, the slurry after reaction are filtered washing, obtain gold concentration and be lower than
The arsenic containing solution and gold-containing residue (7) of 0.05mg/L, gold-containing residue (7) mention gold toward smeltery.
2. according to the method described in claim 1, it is characterized in that the gold concentration of the step (D) precipitate reduction is lower than 0.05mg/L
Arsenic containing solution and iron content acid wastewater in mine carry out aeration neutralization, control air capacity is 50~150m3/ h, with 30% milk of lime
PH to 7~9 is adjusted, it is 5~15g/L that wherein iron content acid wastewater in mine pH, which is 1.2~1.8, Fe ion concentration, and control is molten containing arsenic
The ratio of liquid and iron content acid wastewater in mine makes Fe/As mass ratio be greater than 5, must be aerated the arsenic containing solution neutralized.
3. according to the method described in claim 2, it is characterized in that it is described aeration neutralize arsenic containing solution carry out separation of solid and liquid b, point
From slurry carry out dense processing, obtain overflowing liquid (10) and underflow (11), underflow (11), which is pumped to, to be neutralized slag library and store up.
4. according to the method described in claim 3, it is characterized in that the overflowing liquid (10) a part of return step (A) leaches cycle
It utilizes, qualified discharge after another part can be handled.
5. method described according to claim 1 or 3 or 4, it is characterized in that the step (B) is separated by solid-liquid separation obtained another part
The stoste of high concentration containing arsenic (4) mixes return step (A) leaching with the dense obtained a part of overflowing liquid (10) that handles of b is separated by solid-liquid separation
It is recycled as sizing mixing with solution, another part send to step (D) precipitate reduction and uses.
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| CN201810953645.5A CN108950200B (en) | 2018-08-21 | 2018-08-21 | Method for recovering associated gold by dearsenifying gold-loaded high-arsenic copper concentrate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109706331A (en) * | 2019-03-01 | 2019-05-03 | 赣州有色冶金研究所 | A kind of method of tungsten concentrate dearsenification |
| CN110468282A (en) * | 2019-09-20 | 2019-11-19 | 北方铜业股份有限公司 | The alkali of arsenic-containing material soaks arsenic removing method |
| CN115216628A (en) * | 2022-06-14 | 2022-10-21 | 云锡文山锌铟冶炼有限公司 | Method for removing copper and arsenic from copper and arsenic-containing acidic solution |
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| CN110468282B (en) * | 2019-09-20 | 2022-01-11 | 山西北方铜业有限公司 | Alkaline leaching dearsenification method for arsenic-containing material |
| CN115216628A (en) * | 2022-06-14 | 2022-10-21 | 云锡文山锌铟冶炼有限公司 | Method for removing copper and arsenic from copper and arsenic-containing acidic solution |
| CN115216628B (en) * | 2022-06-14 | 2023-09-22 | 云锡文山锌铟冶炼有限公司 | Method for removing copper and arsenic from copper-arsenic-containing acidic solution |
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