CN109957652A - A method of improving leaching rate golden in the slugging of Gold Concentrate under Normal Pressure pressurised oxygen - Google Patents
A method of improving leaching rate golden in the slugging of Gold Concentrate under Normal Pressure pressurised oxygen Download PDFInfo
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- CN109957652A CN109957652A CN201910398407.7A CN201910398407A CN109957652A CN 109957652 A CN109957652 A CN 109957652A CN 201910398407 A CN201910398407 A CN 201910398407A CN 109957652 A CN109957652 A CN 109957652A
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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
- C22B11/00—Obtaining noble metals
- C22B11/08—Obtaining noble metals by cyaniding
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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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- 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 invention discloses a kind of methods of leaching rate golden in raising Gold Concentrate under Normal Pressure pressurised oxygen slugging, in conjunction with pressure oxidation process characteristic, recycle the waste heat of flash distillation, Gold Concentrate under Normal Pressure after introducing washing aoxidizes ore pulp, and the medicament for abolishing vitriol and gypsum package is added in concatenated reactive tank, by controlling the response parameter of temperature and different phase, reaction is completed under the conditions of lower dosing, treated oxidation ore pulp proposes golden system through cooling enter back into.The dissociation gold wrapped up by vitriol, gypsum can be opened by means of the present invention, and the waste heat of flash system is utilized, processing can be completed using only conventional dose and stirred tank reaction, to obtain higher gold recovery, simple process, economy proposing golden process.The adaptability of pressing technology is also improved simultaneously, expands its application range, improves resource utilization, effect is obvious.
Description
Technical field
The present invention relates to technical field of wet metallurgy, and in particular to a kind of to improve leaching golden in the slugging of Gold Concentrate under Normal Pressure pressurised oxygen
The method of rate.
Background technique
Gold floatation concentrate is due to that can wrap up gold particle, gold particle is more tiny, is wrapped up containing mineral such as pyrite, mispickel
Gold be just less susceptible to exposure and effectively recycled.The generally existing sulfide package of gold floatation concentrate is golden both at home and abroad at present asks
Topic needs to open the gold of sulfide package by the methods of fine grinding or oxidation to this kind of concentrate, could obtain satisfactory gold
Leaching rate.
Pressure oxidation is the most effective technique of current processing sulfide package gold mine, it can with exhaustive oxidation sulfide,
The gold wrapped up is opened, process efficient environmental protection can be handled containing arsenic ore, have good processing to imitate in the gold mine of microfine package
Fruit, for sulfur oxidation rate up to 97% or more, it is even higher that gold recovery generally can achieve 92-95%.But due to Gold Concentrate under Normal Pressure one
As sulfur-bearing it is high, sulphur is oxidized to sulfuric acid after pressure oxidation, under highly acid system, if having in ore containing potassium, sodium mineral or
Contain kalium ion and natrium ion in water body, vitriol precipitating easy to form, this substance can form secondary packet to dissociated gold after oxidation
It wraps up in, so that expection is not achieved in gold leaching rate.
On the other hand, before downstream process-is cyanidation gold-extracted, ore pulp after needing to aoxidize adjusts pH value could be into alkalinity
Row cyaniding, most of factory are to use cheap lime as regulator.Pressure oxidation ore pulp typically contain a large amount of acid and iron from
Son, into extraction of gold process before need solid-liquor separation, washing, remove most sulfuric acid etc. consumption alkaloid substance pH value is adjusted again,
It to reduce lime consumption, but is limited by detersive efficiency, still there is part of sulfuric acid, iron ion etc. to bring the alkali tune process of next stage into,
These substances can generate gypsum with lime reaction:
CaO+H2SO4+H2O=CaSO4·2H2O
Through chemical phase analysis, the gypsum of generation also can form package to gold, reduce the leaching rate of gold.
Gold Concentrate under Normal Pressure passes through pressure oxidation process, and the gold wrapped up has been dissociated, but partially by alum in backend process
The substances such as class, gypsum form secondary capsulation, and the 5-10% that this kind of package can occupy total gold amount is differed, to the oxidation containing golden 20g/t
It for slag, is equivalent to wrap up the gold of 1-2g/t, is worth several hundred member/t, this part gold is dissociation gold by secondary capsulation, such as
Fruit can handle using the means of simple economy and recycle this part gold, and benefit obtained is also very considerable.
Summary of the invention
In view of the deficiencies of the prior art, the present invention is intended to provide a kind of improve leaching rate golden in the slugging of Gold Concentrate under Normal Pressure pressurised oxygen
Method recycle waste heat, be heat-treated with cheap conventional dose in conjunction with pressure oxidation process characteristic, open by two
The gold of secondary package improves gold leaching rate.
To achieve the goals above, the present invention adopts the following technical scheme:
A method of leaching rate golden in the slugging of Gold Concentrate under Normal Pressure pressurised oxygen is improved, is included the following steps:
S1, ore pulp flash distillation: the Gold Concentrate under Normal Pressure oxidation ore pulp after pressure oxidation is washed through flash valve release, then through CCD；
Gold Concentrate under Normal Pressure oxidation ore pulp after S2, CCD washing sequentially enters concatenated No.1 reactive tank, No. two reactive tanks, No. three
It carries out abolishing the golden substance processing of package in reactive tank:
Keeping No.1 reactive tank, No. two reactive tanks, the Gold Concentrate under Normal Pressure oxidation slurry temperature in No. three reactive tanks is respectively 85-90
℃,80-85℃,75-80℃；3 reactive tanks are added medicament, the medicament include lime stone, piece alkali, lime, in carbide slag
One or more；It is 40-120kg medicament that total amount, which is added, in Gold Concentrate under Normal Pressure oxidation slag per ton, and it is aurin that Gold Concentrate under Normal Pressure, which aoxidizes slag,
Mine aoxidizes contained dry mine in ore pulp；No.1 reactive tank, No. two reactive tanks, in No. three reactive tanks when the stop of Gold Concentrate under Normal Pressure oxidation ore pulp
Between be respectively 2-4 hour, 1-2 hour, 1-2 hour, and No. three reactive tanks of control export in Gold Concentrate under Normal Pressure aoxidize the pH value of ore pulp
Between 10.5-12；
S3, from flowed out in No. three reactive tanks Gold Concentrate under Normal Pressure oxidation ore pulp squeeze into ore pulp cooler it is cooling after pump to proposing golden system.
Further, No.1 reactive tank, two are kept using the hot gas being discharged when flash valve release in step S1 as heat source
Gold Concentrate under Normal Pressure oxidation slurry temperature in number reactive tank, No. three reactive tanks is respectively 85-90 DEG C, 80-85 DEG C, 75-80 DEG C.
Further, in step S2, medicament is tuned into pulpous state and is assigned to No.1 reactive tank, No. two reactive tanks, No. three reactive tanks
In.
Further, in step S2, medicament is assigned to No.1 reactive tank, two by 60%, 30%, 10% mass percent
In number reactive tank, No. three reactive tanks.
Further, in step S2, No.1 reactive tank, No. two reactive tanks, the reaction in No. three reactive tanks are in stirring bar
It is carried out under part, stirring intensity is 4.5-5.5m/s.
Further, in step S3, Gold Concentrate under Normal Pressure oxidation ore pulp is flowed out from No. three reactive tanks and squeezes into the cooling of ore pulp cooler
To 40-50 DEG C.
The beneficial effects of the present invention are:
Present invention combination pressure oxidation process characteristic recycles the waste heat of flash distillation, the Gold Concentrate under Normal Pressure oxidation after introducing washing
Ore pulp, and the medicament for abolishing vitriol and gypsum package is added in the concatenated reactive tank, pass through control temperature and different phase
Response parameter completes reaction under the conditions of lower dosing, and treated oxidation ore pulp proposes golden system through cooling enter back into.
The dissociation gold wrapped up by vitriol, gypsum can be opened by means of the present invention, and the waste heat of flash system is utilized, and only made
Processing can be completed with conventional dose and stirred tank reaction, thus mentioning the higher gold recovery of golden process acquisition, simple process,
It is economical.The adaptability of pressing technology is also improved simultaneously, expands its application range, improves resource utilization, effect is obvious.
Detailed description of the invention
Fig. 1 is the implementation flow chart of the embodiment of the present invention 1.
Specific embodiment
Below with reference to attached drawing, the invention will be further described, it should be noted that the present embodiment is with this technology side
Premised on case, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to this reality
Apply example.
Embodiment 1
Gold Concentrate under Normal Pressure oxidation the ore pulp 22-25g/t containing gold, sulfur oxidation rate > that the Gold Concentrate under Normal Pressure pressure oxidation of certain pressurization factory obtains
98%.
As shown in Figure 1, Gold Concentrate under Normal Pressure oxidation ore pulp CCD washing after mass concentration be 45%, CCD washing after oxidation ore pulp according to
It is secondary to pass through 3 concatenated reactive tanks, successively the Gold Concentrate under Normal Pressure oxidation ore pulp after washing is carried out at three-level heat in 3 reactive tanks
Reason；3 reactive tanks are respectively designated as No.1 reactive tank, No. two reactive tanks and No. three reactive tanks along ore pulp flow direction.
Heat source is made with the hot gas flashed out, keeps the gold in No.1 reactive tank, No. two reactive tanks and No. three reactive tanks
It is respectively 88 DEG C, 85 DEG C, 78 DEG C that concentrate, which aoxidizes slurry temperature, and medicament is added in 3 reactive tanks.The medicament presses quality percentage
Than including lime stone 5%, lime 95%, it is 80kg medicament that total amount, which is added, in Gold Concentrate under Normal Pressure oxidation slag per ton, and Gold Concentrate under Normal Pressure aoxidizes slag
As contained dry mine in Gold Concentrate under Normal Pressure oxidation ore pulp.Medicament, which is tuned into after pulpous state, distinguishes one by 60%, 30%, 10% mass percent
In number reactive tank, No. two reactive tanks and No. three reactive tanks, the Gold Concentrate under Normal Pressure oxygen of No.1 reactive tank, No. two reactive tanks and No. three reactive tanks
Changing mortar retention time is respectively 3 hours, 1 hour, 1 hour, stirring intensity 5.1m/s.
Gold Concentrate under Normal Pressure by finely tuning No. three reactive tank outlets of medicament flow control of last slot aoxidizes slurry pH in 10.5-12
Between.Gold Concentrate under Normal Pressure aoxidizes after ore pulp flows out from No. three reactive tanks, is pumped after ore pulp cooler is cooled to 40-50 DEG C to mentioning golden system
System.After processing, tailings gold grade is down to 0.8-1.0g/t.
Using existing method by the Gold Concentrate under Normal Pressure using routine that mass concentration is 45% after washing CCD aoxidizes ore pulp and adds
It is cyanidation gold-extracted after lime alkali tune to pH10-11, gold leaching rate 88-90%, tailings 2-2.5g/t containing gold, the present embodiment method and existing
There is method to compare, gold leaching rate significantly improves.
Embodiment 2
Gold Concentrate under Normal Pressure oxidation the ore pulp 28g/t containing gold, sulfur oxidation rate > 98% that the Gold Concentrate under Normal Pressure pressure oxidation of certain pressurization factory obtains.
Mass concentration is that the oxidation ore pulp after 45%, CCD washing successively passes through 3 after Gold Concentrate under Normal Pressure oxidation ore pulp CCD washing
Concatenated reactive tank successively carries out three-level heat treatment to the Gold Concentrate under Normal Pressure oxidation ore pulp after washing in 3 reactive tanks；3 reactions
Slot is respectively designated as No.1 reactive tank, No. two reactive tanks and No. three reactive tanks along ore pulp flow direction.
Heat source is made with the hot gas flashed out, keeps the gold in No.1 reactive tank, No. two reactive tanks and No. three reactive tanks
It is respectively 85 DEG C, 80 DEG C, 75 DEG C that concentrate, which aoxidizes slurry temperature, and medicament is added in 3 reactive tanks.The medicament presses quality percentage
Than including lime stone 5%, carbide slag 35%, lime 60%, Gold Concentrate under Normal Pressure oxidizing slag dry mine addition medicament 120kg per ton, Gold Concentrate under Normal Pressure
Oxidation slag is contained dry mine in Gold Concentrate under Normal Pressure oxidation ore pulp.Medicament is tuned into the quality percentage after pulpous state by 60%, 30%, 10%
Than in No.1 reactive tank respectively, No. two reactive tanks and No. three reactive tanks, No.1 reactive tank, No. two reactive tanks and No. three reactive tanks
It is respectively 4 hours, 2 hours, 2 hours, stirring intensity 4.5m/s that Gold Concentrate under Normal Pressure, which aoxidizes mortar retention time,.
Gold Concentrate under Normal Pressure by finely tuning No. three reactive tank outlets of medicament flow control of last slot aoxidizes slurry pH in 10.5-12
Between.Gold Concentrate under Normal Pressure aoxidizes after ore pulp flows out from No. three reactive tanks, is pumped after ore pulp cooler is cooled to 40-50 DEG C to mentioning golden system
System.After processing, tailings gold grade is down to 1.5g/t.
According to existing method, mass concentration is 45% using conventional Gold Concentrate under Normal Pressure oxidation ore pulp use after CCD is washed
Cyanidation gold-extracted, gold leaching rate 88% after conventional plus lime alkali tune to pH10-11, tailings 3.36g/t containing gold, the present embodiment method
Relative to existing method, gold leaching rate is significantly increased.
Embodiment 3
Gold Concentrate under Normal Pressure oxidation the ore pulp 19g/t containing gold, sulfur oxidation rate > 98% that the Gold Concentrate under Normal Pressure pressure oxidation of certain pressurization factory obtains.
Mass concentration is that the oxidation ore pulp after 45%, CCD washing successively passes through 3 after Gold Concentrate under Normal Pressure oxidation ore pulp CCD washing
Concatenated reactive tank successively carries out three-level heat treatment to the Gold Concentrate under Normal Pressure oxidation ore pulp after washing in 3 reactive tanks；3 reactions
Slot is respectively designated as No.1 reactive tank, No. two reactive tanks and No. three reactive tanks along ore pulp flow direction.
Heat source is made with the hot gas flashed out, keeps the gold in No.1 reactive tank, No. two reactive tanks and No. three reactive tanks
It is respectively 90 DEG C, 85 DEG C, 80 DEG C that concentrate, which aoxidizes slurry temperature, and medicament is added in 3 reactive tanks.The medicament presses quality percentage
Than including lime stone 10%, piece alkali 25%, lime 65%, Gold Concentrate under Normal Pressure oxidizing slag dry mine addition medicament 40kg per ton, Gold Concentrate under Normal Pressure oxygen
Changing slag is contained dry mine in Gold Concentrate under Normal Pressure oxidation ore pulp.Medicament is tuned into the mass percent after pulpous state by 60%, 30%, 10%
Respectively No.1 reactive tank, in No. two reactive tanks and No. three reactive tanks, the gold of No.1 reactive tank, No. two reactive tanks and No. three reactive tanks
It is respectively 2 hours, 2 hours, 1 hour, stirring intensity 5.5m/s that concentrate, which aoxidizes mortar retention time,.
Gold Concentrate under Normal Pressure by finely tuning No. three reactive tank outlets of medicament flow control of last slot aoxidizes slurry pH in 10.5-12
Between.Gold Concentrate under Normal Pressure aoxidizes after ore pulp flows out from No. three reactive tanks, is pumped after ore pulp cooler is cooled to 40-50 DEG C to mentioning golden system
System.After processing, tailings gold grade is down to 1.2g/t.
According to existing method, the Gold Concentrate under Normal Pressure that mass concentration is 45% after CCD is washed aoxidizes ore pulp and adds stone using conventional
It is cyanidation gold-extracted after grey alkali tune to pH=10-11, gold leaching rate 90.2%, tailings 1.86g/t containing gold, the present embodiment method and existing
Method is compared, and gold leaching rate significantly improves.
For those skilled in the art, it can be provided various corresponding according to above technical solution and design
Change and modification, and all these change and modification, should be construed as being included within the scope of protection of the claims of the present invention.
Claims (6)
1. a kind of method for improving leaching rate golden in the slugging of Gold Concentrate under Normal Pressure pressurised oxygen, which comprises the steps of:
S1, ore pulp flash distillation: the Gold Concentrate under Normal Pressure oxidation ore pulp after pressure oxidation is washed through flash valve release, then through CCD；
Gold Concentrate under Normal Pressure oxidation ore pulp after S2, CCD washing sequentially enters concatenated No.1 reactive tank, No. two reactive tanks, No. three reactions
It carries out abolishing the golden substance processing of package in slot:
To keep No.1 reactive tank, No. two reactive tanks, the Gold Concentrate under Normal Pressure oxidation slurry temperature in No. three reactive tanks be respectively 85-90 DEG C,
80-85℃,75-80℃；3 reactive tanks are added medicament, and the medicament includes lime stone, piece alkali, lime, one in carbide slag
Kind is several；It is 40-120kg medicament that total amount, which is added, in Gold Concentrate under Normal Pressure oxidation slag per ton, and it is Gold Concentrate under Normal Pressure oxygen that Gold Concentrate under Normal Pressure, which aoxidizes slag,
Change contained dry mine in ore pulp；No.1 reactive tank, No. two reactive tanks, in No. three reactive tanks Gold Concentrate under Normal Pressure oxidation ore pulp residence time point
Not Wei 2-4 hours, 1-2 hours, 1-2 hours, and the pH value for controlling the Gold Concentrate under Normal Pressure oxidation ore pulp in the outlet of No. three reactive tanks exists
Between 10.5-12；
S3, from flowed out in No. three reactive tanks Gold Concentrate under Normal Pressure oxidation ore pulp squeeze into ore pulp cooler it is cooling after pump to proposing golden system.
2. the method according to claim 1 for improving leaching rate golden in the slugging of Gold Concentrate under Normal Pressure pressurised oxygen, which is characterized in that benefit
The hot gas being discharged when flash valve release in step S1 is used to keep No.1 reactive tank, No. two reactive tanks, No. three reactive tanks as heat source
In Gold Concentrate under Normal Pressure oxidation slurry temperature be respectively 85-90 DEG C, 80-85 DEG C, 75-80 DEG C.
3. the method according to claim 1 for improving leaching rate golden in the slugging of Gold Concentrate under Normal Pressure pressurised oxygen, which is characterized in that step
In rapid S2, medicament is tuned into pulpous state and is assigned to No.1 reactive tank, No. two reactive tanks, in No. three reactive tanks.
4. the method according to claim 1 for improving leaching rate golden in the slugging of Gold Concentrate under Normal Pressure pressurised oxygen, which is characterized in that step
In rapid S2, medicament is assigned to No.1 reactive tank, No. two reactive tanks, No. three reactive tanks by 60%, 30%, 10% mass percent
In.
5. the method according to claim 1 for improving leaching rate golden in the slugging of Gold Concentrate under Normal Pressure pressurised oxygen, which is characterized in that step
In rapid S2, No.1 reactive tank, No. two reactive tanks, the reaction in No. three reactive tanks carry out under agitation, and stirring intensity is equal
For 4.5-5.5m/s.
6. the method according to claim 1 for improving leaching rate golden in the slugging of Gold Concentrate under Normal Pressure pressurised oxygen, which is characterized in that step
In rapid S3, outflow Gold Concentrate under Normal Pressure oxidation ore pulp squeezes into ore pulp cooler and is cooled to 40-50 DEG C from No. three reactive tanks.
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| CN110331287A (en) * | 2019-08-12 | 2019-10-15 | 贵州紫金矿业股份有限公司 | A kind of Carlin-type gold ore pressure pre-oxidation soda boiling extraction of gold process |
| CN110904335A (en) * | 2019-11-22 | 2020-03-24 | 厦门紫金矿冶技术有限公司 | Method for improving silver leaching rate of pressure oxidation slag of silver-containing gold concentrate difficult to treat |
| CN112011695A (en) * | 2020-09-04 | 2020-12-01 | 贵州紫金矿业股份有限公司 | Method for breaking alum and extracting gold from cyanidation tailings in pressurization pre-oxidation |
| CN113846213A (en) * | 2021-09-24 | 2021-12-28 | 中国恩菲工程技术有限公司 | Refractory gold ore processing system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110331287A (en) * | 2019-08-12 | 2019-10-15 | 贵州紫金矿业股份有限公司 | A kind of Carlin-type gold ore pressure pre-oxidation soda boiling extraction of gold process |
| CN110904335A (en) * | 2019-11-22 | 2020-03-24 | 厦门紫金矿冶技术有限公司 | Method for improving silver leaching rate of pressure oxidation slag of silver-containing gold concentrate difficult to treat |
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