CN108913875A - A kind of mill leaching pretreating process of difficult-treating gold mine - Google Patents
A kind of mill leaching pretreating process of difficult-treating gold mine Download PDFInfo
- Publication number
- CN108913875A CN108913875A CN201810805550.9A CN201810805550A CN108913875A CN 108913875 A CN108913875 A CN 108913875A CN 201810805550 A CN201810805550 A CN 201810805550A CN 108913875 A CN108913875 A CN 108913875A
- Authority
- CN
- China
- Prior art keywords
- gold
- gold mine
- pretreating process
- roasting
- grinding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/64—Thiosulfates; Dithionites; Polythionates
-
- 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
-
- 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
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of mills of difficult-treating gold mine to soak pretreating process, and the combined pretreatment of anaerobic roasting and mechanical activation leching is carried out primarily directed to difficult-treating gold mine, and the specific steps are S1, broken, the ball powder-grinding by gold mine, obtains gold mine powder；S2, the gold mine powder is placed in oxygen-free atmosphere or is roasted in a vacuum, fired slags and flue dust are obtained after roasting；S3, the fired slags grind and are sized mixing, then slurry is placed in progress temperature control, leaching in reaction kettle, obtain base metal leachate and leached mud；S4, the leached mud is subjected to desulfurizing and purifying；S5, purification slag is carried out to mention gold with soaking golden agent again.The advantages of present invention incorporates roasting method and mechanical activation leching methods has many advantages, such as that adaptability to raw material is strong, operating condition is mild, equipment requirement is low, environment and remarkable in economical benefits.
Description
Technical field
The present invention relates to a kind of mills of difficult-treating gold mine to soak pretreating process, belongs to gold extractive technique field.
Background technique
Currently, difficult-treating gold mine has become the primary raw material of golden production, the goldc grains in such ore often by mispickel,
Pyrite sulfides package, and contain more impurity element, such as sulphur, arsenic, antimony, copper and carbon.Using traditional direct cyanogen
Change extract technology, golden leaching rate is low, and the consumption of cyanide is very big.Such gold ore processing is needed in cyanide gold-leaching
Ore is pre-processed before, the ore of package gold is made to decompose, allows the exposed processing of gold, so as to subsequent cyanidation gold-extracted
Process gold can directly be contacted with cyanide and be reacted, to improve the leaching rate of gold.
Now, mainly have to the common preprocess method of this Technique of Refractory Gold Ores both at home and abroad：Roasting oxidation method, pressurised oxygen
Change method etc..Wherein, (1) roasting oxidation method is most common preprocess method, the roasting oxidation method industrially used at present
It is all to be carried out in aerobic environment, principle is that sulfide oxidation volatilizees, and advantage has：Strong to adaptability to raw material, technology can
It leans on, is easy to operate；Sulphur can be with relieving haperacidity in flue dust.It is disadvantageous in that：1. discharging a large amount of SO2、As2O3Equal toxic and harmful gas；②
Furnace gas dust cleaning device is complicated, and operating cost is high, seriously pollutes environment；3. technological operation requires strictly, to be easy to cause and " owe
Burn " or " burning ", cause sulfide decomposition to be not thorough or secondary capsulation gold, influences the rate of recovery of gold.Present more and more roastings
Factory all stops production or uses the oxidation technology of other low pollutions.(2) pressure oxidation method needs to be passed through oxygen in reaction process, right
Equipment requirement is high, and high temperature and pressure, there are security risks；Maintenance cost is high；Process control condition requires strictly, to react the list of generation
Easily package is golden again for matter Sulfur capacity, influences the recycling of gold.How great attention with China to environmental protection, have for difficult-treating gold mine
It imitates and reasonably selects and select smelting treatment process, develop and use refractory gold ore to high-efficiency environment friendly, it has also become China's golden production enterprise
Industry technical problem in the urgent need to address.Especially for some area or the lesser enterprises of scale can not bear pressurization at
A kind of new pretreating process is needed in the case of this.
Summary of the invention
(1) technical problems to be solved
In order to solve the above problem of the prior art, the present invention provides a kind of mill leaching pretreating process of difficult-treating gold mine,
Anaerobic roasting and mechanical activation leching combined pretreatment technique are carried out mainly for difficult-treating gold mine, adaptability to raw material can be reached
By force, the advantages that environmental-friendly, treatment conditions safety is mildly, equipment requirement is low, waste residue amount is few.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include：
A kind of mill leaching pretreating process of difficult-treating gold mine comprising following steps：
S1, broken, the ball powder-grinding by gold mine, obtain gold mine powder；
S2, the gold mine powder is placed in oxygen-free atmosphere or is roasted in a vacuum, roasted after roasting
Slag and flue dust；
S3, the fired slags are carried out grinding to size mixing to obtain slurry, it is described to size mixing to be added containing sour and trivalent iron salt molten
Liquid, then slurry is placed in progress temperature control, leaching in reaction kettle, obtain base metal leachate and leached mud；
S4, sulphite saturated solution is added in the leached mud, carries out desulfurizing and purifying, filtering obtains purification slag and thio
Sulfate liquor；
S5, the purification slag is carried out to mention gold with soaking golden agent again.
Pretreating process as described above, it is preferable that in step sl, the gold mine is the gold mine of sulfur-bearing, the gold mine
The granularity of powder is to account for 50%~95% less than 0.074mm.
Further, pretreating process of the invention is preferably applied to the gold mine that difficult-treating gold mine is sulfur-bearing.
Pretreating process as described above, it is preferable that in step s 2, the oxygen-free gas is nitrogen, hydrogen, sulphur
At least one of gas, natural gas or inert gas etc..
Further, the inert gas includes argon gas, helium, neon, Krypton, xenon etc..
Pretreating process as described above, it is preferable that in step s 2, the vacuum condition is control reaction residual voltage 20
~200Pa.
Wherein, residual voltage refers to the residual compression of vacuum baking system after reaction.Since reaction process has gas raw
It needs constantly to vacuumize in continuous reduce at vacuum degree, therefore control vacuum reaction is actually controlled to control based on residual voltage
Residual voltage is exactly that pressure is controlled in reaction process in residual voltage range below.
Pretreating process as described above, it is preferable that in step s 2, the temperature of the roasting is 600~1000 DEG C, roasting
The time of burning is 0.25~4 hour.
Pretreating process as described above, it is preferable that in step s 2, the cooling sulfur-bearing that obtains of the flue dust of acquisition produces
Product.
At different conditions, sulfur-bearing product is pure simple substance sulphur to flue dust；Hydrogen sulfide；Elemental sulfur and arsenones, antimony trisulfide it is mixed
It is one such to close object etc..
Pretreating process as described above, it is preferable that in step s3, the grinding sizes mixing for fired slags and ore grinding to be situated between
It dry grinds after matter mixing, then the fired slags of milled is sized mixing；
Or the grinding is sized mixing for milling medium is added in fired slags and containing sour and trivalent iron salt solution；
Wherein, the mass ratio of the milling medium and fired slags is 0.5:1~50:1, milling time is 5~150min, institute
Stating milling medium, that zirconia ball, carbonization silicon ball, ore particles, industrial slag particle etc. can be used is one or more.
Pretreating process as described above, it is preferable that in step s3, it is described acid be sulfuric acid, hydrochloric acid and nitric acid in extremely
Few one kind, the trivalent iron salt are at least one of ferric sulfate, iron chloride and ferric nitrate；The fired slags and the sour iron are molten
The mass ratio of liquid is 1:0.5~1:50；It wherein, is 1~200g/L containing acid concentration in the sour ferrous solution, containing the dense of trivalent iron salt
Degree is 10~500g/L.
Pretreating process as described above, it is preferable that in step s3, the temperature in the reaction kettle is 30~100
DEG C, mixing speed is 200~2000r/min, and the reaction time of the leaching is 10~150min.Since the reaction may be implemented in
It is carried out under low-temperature atmosphere-pressure, further reduced equipment cost and operating cost.
Pretreating process as described above, it is preferable that in step s 4, the condition of the desulfurizing and purifying is control temperature
At 100~120 DEG C, the sulphite saturated solution and leached mud mass ratio are 0.5~8:1, it is molten that sulphite saturation is added
7~12, the reaction time is 10~150min for the pH value control of system after liquid.Slurry after desulfurization is purified after filtering
Slag, then purification slag is carried out to mention gold with golden agent is soaked.
Desulfurizing and purifying is the soluble-salt for converting the sulphur for grinding dipped journey generation to sulfur-bearing, the reaction of desulfurizing and purifying：
(3) beneficial effect
The beneficial effects of the invention are as follows：
The prior art is compared, the present invention has following remarkable advantage：
1. pretreating process of the invention is different from existing two-stage calcination pretreating process, pretreatment work is soaked using mill
Skill, whole process does not need to be converted into sulfur trioxide and uses water acid manufacturing processes again without sulfur dioxide pollution object, at low cost and environmentally friendly.
2. pretreating process of the invention is different from existing pressure leaching preconditioning technique, pretreatment work is soaked using mill
Skill, advantage are not required to reaction under high pressure first is that can carry out Leach reaction under low-temperature atmosphere-pressure, reduce equipment investment and operation at
This；Second is that grinding is sized mixing, process has scouring mineral surfaces and increases solid dissolution advantage, makes the leaching of the iron in sulfide
Extracting rate improves, and leaching velocity is accelerated, and is not easy to form secondary capsulation object and reduces efficiency.
3. the poisonous and harmful elements such as arsenic antimony are waved in the form of simple substance or sulfide due to roasting in oxygen-free atmosphere or vacuum
Hair, toxicity are greatly lowered, and later separation recycling is easier.
4. the more existing pretreating process of the present invention has an energy-saving and emission-reduction, and the sulfur-bearing product and thiosulfate of output can be with
For sale, economic and social benefit is very significant, and technique has apparent advanced.
Detailed description of the invention
Fig. 1 is the process flow diagram of one embodiment of the present invention.
Specific embodiment
For the present invention primarily directed to difficult-treating gold mine, difficult-treating gold mine is primarily referred to as the gold mine of sulfur-bearing, is roasted using anaerobic
Combine activation, which is leached, pre-processes gold mine, and process flow can be as shown in Figure 1, specifically, and difficult-treating gold mine is in order to fill
Point roasting, be crushed, ore grinding is made powder and carries out anaerobic or vacuum baking, and anaerobic roasting is mainly to be passed through oxygen-free gas
Body, such as nitrogen, hydrogen, sulphur gas, natural gas or inert gas (argon gas, helium, neon, Krypton, xenon) are to difficult-treating gold mine
Roasting, roasting obtain fired slags and flue dust containing gold, other metals and its metal sulfide, and flue dust can get sulfur-bearing through supercooling
Product；Sulphur products are related with gold ore type, and it is pure simple substance sulphur that at different conditions, the sulfur-bearing product of formation is different for flue dust；
Hydrogen sulfide；Elemental sulfur and arsenones, the mixture etc. of antimony trisulfide are one such.Fired slags carry out after grinding sizes mixing and can first dry grind
Size mixing acidleach, can also side edging size mixing acidleach, acidleach of sizing mixing is that acid solution and trivalent iron salt is added, and is stirred simultaneously, at this
Under the conditions of kind of stirring acidleach, so that ferro element in slag is aoxidized production salt and enter solution and form base metal leachate, it is gold, solid
Body sulphur and other insoluble matters enter leached mud.Sulphite saturated solution is added in leached mud and carries out desulfurizing and purifying, makes leached mud
In sulphur aoxidize to form thiosulfate and the purification slag different from solution, i.e., leached mud pass through desulfurizing and purifying, sulphur forms thio
Sulfate enters solution, and the purification slag containing gold can directly mention gold.Gold extracting method can be used the extraction of gold by cyanidation of the prior art into
Row, details are not described herein.
Wherein, the reaction of difficult-treating gold mine object Roasting Decomposition in oxygen-free atmosphere or vacuum：
FeS2→ FeS+S (gas)
CuFeS2→Cu2S+2FeS+S (gas)
FeAsS → As (gas)+FeS1-x+ xS (gas)
As+S→As2S3(gas)
FeSbS → Sb (gas)+FeS1-x+ xS (gas)
2Sb+3S→Sb2S3(gas)
S (gas)+H2(gas) → H2S (gas)
Roast the reaction of the dipped journey of sizing：
FeS1-x+2Fe3+→3Fe2++ (1-x) S (solid)
4FeS+9O2+4H+→4Fe3++4SO4 2-+2H2O
In order to preferably explain the present invention, in order to understand, below by specific embodiment, present invention work is retouched in detail
It states.
Embodiment 1
The present embodiment selects Fujian difficult-treating gold mine, and gold is largely wrapped in sulfide, and ingredient is containing gold
45.6g/t, iron 15.8%, sulphur 26.4%.The concrete operation step and technological parameter that this example uses are as follows：Take 100 grams of difficulty
Manage that gold mine is broken, ball powder-grinding, granularity is to account for 95% less than 0.074mm, is fitted into rotary kiln and is put into airtight heating, is passed through nitrogen
Anaerobic roasting is carried out, maturing temperature is controlled at 1000 DEG C, calcining time 0.25 hour.The flue dust that roasting generates is cooling to obtain sulphur
Sulphur, by milling medium zirconia ball according to the mass ratio of fired slags be 0.5:1 mixing dry grinding, milling time 150min.It grinds
Fired slags are taken out after mill, and the sour ferrous solution containing 200g/L sulfuric acid and 10g/L ferric sulfate is added and sizes mixing, fired slags and sour ferrous solution
Mass ratio be 1:50.Mixing, which is sized mixing, to be placed in reaction kettle, controls 30 DEG C of extraction temperature, mixing speed 200r/min, leaching
The reaction time is 150min out.Iron leachate and leached mud are obtained after leaching.Mass ratio, which is added, to filter cake after filtering is
0.5:1 sodium sulfite saturated solution carries out desulfurizing and purifying, that is, sodium sulfite saturated solution：Leached mud=0.5:1, control temperature
At 100 DEG C, pH value 7, reaction time 150min.It filters after the reaction was completed and filter residue is carried out with cyaniding again to mention gold, obtain gold
Leaching rate be 97.2%.
As a comparison, to the difficult-treating gold mine using directly cyanidation gold-extracted, gold leaching rate only 32.4%.
As a comparison, cyanidation gold-extracted using conventional two-stage calcination pretreatment-to the difficult-treating gold mine, one section of 450 DEG C of roasting
It burns 1 hour, two sections 650 DEG C roast 1 hour, and the calcining of formation mentions gold under the conditions of same cyanidation gold-extracted, and golden leaching rate is
84%, but a large amount of sulfur dioxide gas are formd in roasting process, absorption process is complicated, and golden partially by secondary packet after roasting
It wraps up in.
As a comparison, cyanidation gold-extracted using pressure leaching pretreatment-to the difficult-treating gold mine, 220 DEG C of temperature, partial pressure of oxygen
1.6Mpa, pressure oxidation 4h, oxidizing slag mention gold under the conditions of same cyanidation gold-extracted, and golden leaching rate is 88%, but equipment
It is required that high corrosion is serious, and later separation processing is difficult.
Embodiment 2
The present embodiment selects Gansu difficult-treating gold mine, and gold is wrapped in sulfide in microfine disseminated, and ingredient is
Containing golden 52.4g/t, iron 21.5%, sulphur 23.6%, copper 1.2%, arsenic 7.8%, antimony 2.3%.The concrete operation step that this example uses
It is as follows with technological parameter：100 grams of difficult-treating gold mines are taken to be crushed, ball powder-grinding, granularity is to account for 65% less than 0.074mm, is placed in
Vacuum drying oven is roasted, and for the control of control maturing temperature at 600 DEG C, calcining time 4 hours, reaction residual voltage is 200Pa.Roasting generates
Flue dust cooling obtain sulphur, arsenic, antimony, arsenones and antimony trisulfide.Being added to fired slags with fired slags mass ratio is 50:1 carbon
SiClx ball, the sour ferrous solution for adding hydrochloric acid containing 200g/L and 500g/L iron chloride are sized mixing, the quality of fired slags and sour ferrous solution
Than being 1:0.5, side edging is sized mixing 5min.Fired slags slurry is taken out after grinding to be placed in reaction kettle, controls 100 DEG C of extraction temperature,
Mixing speed is 2000r/min, and the Leach reaction time is 10min.Iron leachate and leached mud are obtained after leaching.After filtering
It is 8 that mass ratio, which is added, to filter cake:1 calcium sulfite saturated solution carries out desulfurizing and purifying, and control temperature is at 120 DEG C, pH value 12, instead
It is 10min between seasonable.It filters after the reaction was completed and filter residue is carried out with cyaniding again to mention gold, the leaching rate for obtaining gold is 93.5%.
As a comparison, to the difficult-treating gold mine using directly cyanidation gold-extracted, gold leaching rate only 15.7%, gold can not almost be returned
It receives.
As a comparison, the leaching rate cyanidation gold-extracted, golden using two-stage calcination identical with 1 conditional of embodiment pretreatment-
It is 81%, but forms sulfur dioxide gas largely containing arsenic in roasting process, seriously polluted and absorption process is complicated；
As a comparison, cyanidation gold-extracted using pressure leaching identical with 1 condition of embodiment pretreatment-, golden leaching rate is
85%, but the high requirements on the equipment, equipment seriously corroded, operating difficulties and later separation processing are difficult.
Embodiment 3
The present embodiment selects Anhui difficult-treating gold mine, and gold is wrapped in sulfide, and ingredient predominantly contains gold
65.9g/t, iron 19.1%, sulphur 20.2%, carbon 1.7%.The concrete operation step and technological parameter that this example uses are as follows：Take 100
Gram difficult-treating gold mine is broken, ball powder-grinding, and granularity is to account for 50% less than 0.074mm, is placed in heating furnace and is passed through hydrogen and natural
Gaseous mixture (the two volume ratio 1 of gas:1) it is roasted, maturing temperature is controlled at 750 DEG C, calcining time 2 hours.Roasting generates
Flue dust cooling obtain the products such as hydrogen sulfide.Being added to fired slags with fired slags mass ratio is 20:1 ore particles ore grinding is situated between
Matter, the sour ferrous solution for adding nitric acid containing 100g/L and 200g/L iron chloride are sized mixing, and the mass ratio of fired slags and sour ferrous solution is
1:10, side edging is sized mixing 50min.Fired slags slurry is taken out after grinding to be placed in reaction kettle, controls 75 DEG C of extraction temperature, stirring speed
Degree is 1000r/min, and the Leach reaction time is 60min.Iron leachate and leached mud are obtained after leaching.To filter cake after filtering
It is 5 that mass ratio, which is added,:1 potassium sulfite saturated solution carries out desulfurizing and purifying, and control temperature is at 110 DEG C, pH value 10, the reaction time
For 90min.It filters after the reaction was completed and filter residue is carried out with cyaniding again to mention gold, the leaching rate for obtaining gold is 97.6%.
As a comparison, to the difficult-treating gold mine using directly cyanidation gold-extracted, gold leaching rate only 41.4%, gold is largely lost.
As a comparison, the leaching rate cyanidation gold-extracted, golden using two-stage calcination identical with 1 conditional of embodiment pretreatment-
It is 84%, but forms in roasting process largely containing sulfur dioxide gas, seriously polluted and absorption process is complicated.
As a comparison, cyanidation gold-extracted using pressure leaching identical with 1 condition of embodiment pretreatment-, golden leaching rate is
57%, leaching rate is not high, equipment requirement is harsh, equipment seriously corroded, operating difficulties and later separation processing are difficult.
Embodiment 4
The present embodiment selects Inner Mongol difficult-treating gold mine, and gold is wrapped in sulfide, and ingredient is containing golden 52.2g/
T, iron 26.5%, sulphur 33.7%, arsenic 8.5%, antimony 1.9%.The concrete operation step and technological parameter that this example uses are as follows：It takes
100 grams of difficult-treating gold mines are broken, ball powder-grinding, and granularity is to account for 60% less than 0.074mm, is placed in vacuum furnace and is roasted
It burns, maturing temperature is controlled at 800 DEG C, calcining time 1.5 hours, reacts residual voltage 20Pa.The flue dust that roasting generates is cooling to obtain sulphur
The products such as sulphur, arsenones, antimony trisulfide.Using mixture (two kinds of milling medium quality phases of zirconia ball and industrial slag particle
Together) be used as milling medium, by milling medium according to the mass ratio of fired slags be 50:1 mixing dry grinding, milling time 5min.
Fired slags are taken out after grinding, the sour iron that sulfuric acid containing 150g/L, 50g/L ferric sulfate, 50g/L nitric acid and 350g/L iron chloride is added is molten
Liquid is sized mixing, and the mass ratio of fired slags and sour ferrous solution is 1:40.Mixing, which is sized mixing, to be placed in reaction kettle, and extraction temperature 45 is controlled
DEG C, mixing speed 700r/min, the Leach reaction time is 45min.Iron content leachate and leached mud are obtained after leaching.It crosses
Being obtained in filter cake, that is, leached mud after filter and mass ratio is added is 2:1 sodium sulfite saturated solution carries out desulfurizing and purifying, and control temperature exists
106 DEG C, pH value 11, reaction time 45min.It filters after the reaction was completed and filter residue is carried out with cyaniding again to mention gold, obtain gold
Leaching rate is 98.3%.
As a comparison, to the difficult-treating gold mine using directly cyanidation gold-extracted, gold leaching rate only 10.6%, gold can not almost be returned
It receives.
As a comparison, the leaching rate cyanidation gold-extracted, golden using two-stage calcination identical with 1 conditional of embodiment pretreatment-
It is 79%, but forms sulfur dioxide gas largely containing arsenic in roasting process, seriously polluted and absorption process is complicated.
As a comparison, cyanidation gold-extracted using pressure leaching identical with 1 condition of embodiment pretreatment-, golden leaching rate is
87%, but it is difficult to the processing of equipment requirement harshness, equipment seriously corroded, operating difficulties and later separation.
In conclusion golden leaching rate not only greatly improves after process of the invention, moreover it is possible to by-product sulphur, low-priced
The products such as metal do not generate a large amount of polluted gas such as sulfur dioxide, meet demand of industrial production, and equipment requirement is low, operation side
Just, energy-saving and emission-reduction and remarkable in economical benefits.
The above described is only a preferred embodiment of the present invention, being not the limitation for doing other forms to the present invention, appoint
What those skilled in the art can use the equivalence enforcement that technology contents disclosed above were changed or be modified as equivalent variations
Example.But without departing from the technical solutions of the present invention, according to the technical essence of the invention to the above embodiments
What simple modification, equivalent variations and remodeling, still falls within the protection scope of technical solution of the present invention.
Claims (10)
1. a kind of mill of Refractory Au-ores soaks pretreating process, which is characterized in that it includes the following steps：
S1, broken, the ball powder-grinding by gold mine, obtain gold mine powder；
S2, the gold mine powder is placed in oxygen-free atmosphere or is roasted in a vacuum, fired slags are obtained after roasting
And flue dust；
S3, the fired slags are carried out grinding to size mixing to obtain slurry, it is described to size mixing as the solution containing acid and trivalent iron salt is added, then
Slurry is placed in progress temperature control, leaching in reaction kettle, obtains base metal leachate and leached mud；
S4, sulphite saturated solution is added in the leached mud, carries out desulfurizing and purifying, filtering obtains purification slag and thiosulfuric acid
Salting liquid；
S5, purification slag is carried out to mention gold with soaking golden agent again.
2. pretreating process as described in claim 1, which is characterized in that in step sl, the gold mine is the gold mine of sulfur-bearing,
The granularity of the gold mine powder is to account for 50%~95% less than 0.074mm.
3. pretreating process as described in claim 1, which is characterized in that in step s 2, the oxygen-free gas is nitrogen
At least one of gas, hydrogen, sulphur gas, natural gas or inert gas.
4. pretreating process as described in claim 1, which is characterized in that in step s 2, the vacuum condition is that control is anti-
Answer residual voltage in 20~200Pa.
5. pretreating process as described in claim 1, which is characterized in that in step s 2, the temperature of the roasting is 600~
1000 DEG C, the time of roasting is 0.25~4 hour.
6. pretreating process as described in claim 1, which is characterized in that in step s 2, the flue dust cooling of acquisition obtains
Obtain sulfur-bearing product.
7. pretreating process as described in claim 1, which is characterized in that in step s3, the grinding is sized mixing as that will roast
Slag is dry grinded after mixing with milling medium, then the fired slags of milled are sized mixing；
Or the grinding is sized mixing as milling medium is added in fired slags and containing sour and trivalent iron salt solution, carries out the tune in ore grinding
Slurry；
Wherein, the mass ratio of the milling medium and fired slags is 0.5:1~50:1, milling time is 5~150min, the mill
Mine medium is at least one of zirconia ball, carbonization silicon ball, ore particles or industrial slag particle.
8. pretreating process as described in claim 1, which is characterized in that in step s3, the acid is sulfuric acid, hydrochloric acid and nitre
At least one of acid, the trivalent iron salt are at least one of ferric sulfate, iron chloride and ferric nitrate；The fired slags and institute
The mass ratio for stating sour ferrous solution is 1:0.5~1:50；Wherein, the concentration containing acid is 1~200g/L in the sour ferrous solution, contains three
The concentration of valence molysite is 10~500g/L.
9. pretreating process as described in claim 1, which is characterized in that in step s3, the temperature in the reaction kettle is
30~100 DEG C, mixing speed is 200~2000r/min, and the reaction time of the leaching is 10~150min.
10. pretreating process as described in claim 1, which is characterized in that in step s 4, the condition of desulfurizing and purifying is control
For temperature processed at 100~120 DEG C, the sulphite saturated solution and leached mud mass ratio are 0.5~8:1, sulphite is added
7~12, the reaction time is 10~150min for the pH value control of system after saturated solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810805550.9A CN108913875A (en) | 2018-07-20 | 2018-07-20 | A kind of mill leaching pretreating process of difficult-treating gold mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810805550.9A CN108913875A (en) | 2018-07-20 | 2018-07-20 | A kind of mill leaching pretreating process of difficult-treating gold mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108913875A true CN108913875A (en) | 2018-11-30 |
Family
ID=64415584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810805550.9A Pending CN108913875A (en) | 2018-07-20 | 2018-07-20 | A kind of mill leaching pretreating process of difficult-treating gold mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108913875A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110863218A (en) * | 2019-11-27 | 2020-03-06 | 东北大学 | Method for extracting gold by adopting molten salt electrolysis enrichment |
| CN111471851A (en) * | 2020-05-29 | 2020-07-31 | 东北大学 | Mineral separation and gold extraction method for treating sulfur-containing and carbon-containing gold ore by suspension roasting |
| CN111690820A (en) * | 2019-03-14 | 2020-09-22 | 北京利豪森矿业技术有限公司 | Atmospheric oxygen-enriched acid leaching method for copper-containing flotation gold concentrate |
| CN112143883A (en) * | 2020-09-28 | 2020-12-29 | 山东国大黄金股份有限公司 | Method for reducing concentration of acid in gold concentrate roasting smelting purification waste acid |
| CN115478168A (en) * | 2022-09-16 | 2022-12-16 | 中南大学 | Method for in-situ self-leaching gold from sulfide gold ore |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107153A (en) * | 1985-09-20 | 1987-04-01 | 贵州工学院 | Zinc ore concentrate or the direct leaching method of zinc vulcanizing mine normal pressure |
| CN1189541A (en) * | 1997-01-27 | 1998-08-05 | 东北大学 | Method of extracting copper, iron gold, silver and sulphur from auricupride |
| CN103993169A (en) * | 2014-06-06 | 2014-08-20 | 中南大学 | Catalytic oxidation pressure acid leaching decomposition method of nickel-molybdenum ore |
| CN107893160A (en) * | 2017-12-19 | 2018-04-10 | 东北大学 | Thiosulfate and the technique for carrying gold from difficult-treating gold mine is prepared in situ |
| CN108103322A (en) * | 2017-12-19 | 2018-06-01 | 东北大学 | Thiocarbamide and the technique for carrying gold from difficult-treating gold mine is prepared in situ |
-
2018
- 2018-07-20 CN CN201810805550.9A patent/CN108913875A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107153A (en) * | 1985-09-20 | 1987-04-01 | 贵州工学院 | Zinc ore concentrate or the direct leaching method of zinc vulcanizing mine normal pressure |
| CN1189541A (en) * | 1997-01-27 | 1998-08-05 | 东北大学 | Method of extracting copper, iron gold, silver and sulphur from auricupride |
| CN103993169A (en) * | 2014-06-06 | 2014-08-20 | 中南大学 | Catalytic oxidation pressure acid leaching decomposition method of nickel-molybdenum ore |
| CN107893160A (en) * | 2017-12-19 | 2018-04-10 | 东北大学 | Thiosulfate and the technique for carrying gold from difficult-treating gold mine is prepared in situ |
| CN108103322A (en) * | 2017-12-19 | 2018-06-01 | 东北大学 | Thiocarbamide and the technique for carrying gold from difficult-treating gold mine is prepared in situ |
Non-Patent Citations (1)
| Title |
|---|
| 中南矿冶学院冶金研究室: "《氯化冶金》", 31 March 1978, 冶金工业出版社 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111690820A (en) * | 2019-03-14 | 2020-09-22 | 北京利豪森矿业技术有限公司 | Atmospheric oxygen-enriched acid leaching method for copper-containing flotation gold concentrate |
| CN110863218A (en) * | 2019-11-27 | 2020-03-06 | 东北大学 | Method for extracting gold by adopting molten salt electrolysis enrichment |
| CN110863218B (en) * | 2019-11-27 | 2021-11-30 | 东北大学 | Method for extracting gold by adopting molten salt electrolysis enrichment |
| CN111471851A (en) * | 2020-05-29 | 2020-07-31 | 东北大学 | Mineral separation and gold extraction method for treating sulfur-containing and carbon-containing gold ore by suspension roasting |
| CN112143883A (en) * | 2020-09-28 | 2020-12-29 | 山东国大黄金股份有限公司 | Method for reducing concentration of acid in gold concentrate roasting smelting purification waste acid |
| CN112143883B (en) * | 2020-09-28 | 2021-12-14 | 山东国大黄金股份有限公司 | Method for reducing concentration of acid in gold concentrate roasting smelting purification waste acid |
| CN115478168A (en) * | 2022-09-16 | 2022-12-16 | 中南大学 | Method for in-situ self-leaching gold from sulfide gold ore |
| CN115478168B (en) * | 2022-09-16 | 2023-09-26 | 中南大学 | Method for in-situ self-leaching gold from sulfide gold ore |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108913875A (en) | A kind of mill leaching pretreating process of difficult-treating gold mine | |
| He et al. | Hazard-free treatment of electrolytic manganese residue and recovery of manganese using low temperature roasting-water washing process | |
| CN107893160B (en) | Thiosulfate and the technique for mentioning gold from difficult-treating gold mine is prepared in situ | |
| CN106868307B (en) | A kind of comprehensive utilization process of pyrite cinder arsenic removal enrichment gold and silver | |
| CN104762466A (en) | Liquid preparation method for producing electrolytic manganese or manganese dioxide from low-grade manganese oxide ore | |
| CN106119565B (en) | A kind of method of the leaching of manganese from manganese-silver ore and silver production manganese sulfate and silver | |
| CN108559836A (en) | A kind of gold mine carries the pretreating process of gold | |
| CN110029218B (en) | Comprehensive utilization method of gold mine cyanide-containing tailing slag | |
| CN109957657B (en) | Method for simultaneously recycling iron, sodium and aluminum from red mud | |
| Mahdavian et al. | Recovery of vanadium from Esfahan Steel Company steel slag; optimizing of roasting and leaching parameters | |
| CN102534195B (en) | Gold extraction process method for refractory gold ore | |
| CN104152671B (en) | A kind of method of being prepared ironmaking iron ore concentrate by Iron Ore Containing Tin | |
| CN105861838A (en) | Method for enriching platinum from fluorine-containing failure platinum catalyst | |
| CN103866116A (en) | Method for oxidizing molybdenum concentrate | |
| CN111996364B (en) | Method for recovering gold from cyanidation tailings and synchronously magnetizing iron | |
| CN105907992B (en) | A kind of method that pressure oxidation detaches molybdenum, copper and rhenium in Low Grade Molybdenum Concentrates | |
| CN102409161A (en) | Method for increasing leaching rate of gold and silver | |
| CN106882839B (en) | Method for comprehensively utilizing titanium white waste acid | |
| CN110551904A (en) | Non-cyanogen gold leaching and gold extraction method for high-sulfur-arsenic-carbon refractory gold concentrate | |
| CN106995887B (en) | A kind of copper sulfide produces the technique and its system of metallic copper or copper compound | |
| CN113136488B (en) | Wet treatment process for iron vitriol slag in zinc hydrometallurgy | |
| CN108103322B (en) | Thiocarbamide and the technique for mentioning gold from difficult-treating gold mine is prepared in situ | |
| CN112080648B (en) | Method for treating indium-containing high-iron zinc sulfide concentrate | |
| CN102912124A (en) | Method for recovering nickel, cobalt, manganese and iron by hydrochloric acid leaching of nickel oxide ore | |
| CN111647704B (en) | Zinc recovery method based on HIsmelt smelting reduction furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181130 |