CN106435191A - Treatment method and system of heat-state metallized pellet - Google Patents
Treatment method and system of heat-state metallized pellet Download PDFInfo
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- CN106435191A CN106435191A CN201610795356.8A CN201610795356A CN106435191A CN 106435191 A CN106435191 A CN 106435191A CN 201610795356 A CN201610795356 A CN 201610795356A CN 106435191 A CN106435191 A CN 106435191A
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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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B15/00—Other processes for the manufacture of iron from iron compounds
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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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/005—Preliminary treatment of scrap
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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
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0407—Leaching processes
- C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
- C22B23/043—Sulfurated acids or salts thereof
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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
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Abstract
The invention discloses a treatment method and system of a heat-state metallized pellet. The treatment method of the heat-state metallized pellet comprises the steps that the heat-state metallized pellet is subject to water quenching and breaking, thiosulfate gold leaching liquid and an inhibitor are added for wet ore grinding, obtained powder abrasive slurry is subject to solid-liquid separation to obtain a solid mixture and filter liquor, the solid mixture is subject to reselection to obtain metallic gold and a light mixture, and the light mixture is subject to magnetic separation to obtain metal iron/iron alloy particles; quick lime is added into filter liquor for reaction to obtain ferrous hydroxide, and after burning, iron oxide red is obtained. The invention further discloses the system for implementing the treatment method. The system comprises a metallized pellet treatment device, a wet ore grinding device, a solid-liquid separation device, a reselection separation device, a magnetic separation device, a precipitation separation device and a burning device. According to the treatment method and system of the heat-state metallized pellet, comprehensive utilization of the heat-state metallized pellet and the thiosulfate gold leaching liquid is achieved.
Description
Technical field
The present invention relates to a kind of processing method of thermal state metal pellet, further relate to a kind of process of thermal state metal pellet
System, belongs to metallurgical technology field.
Background technology
Metallized pellet generally refers to ferrous material pelletizing roasted product of obtaining after direct-reduction, wherein iron mainly with
Presented in metallic iron or ferroalloy (in ferroalloy, iron is existed by metallic iron form), therefore its degree of metalization typically up to
60%～95%.Metal current pellet is many to be processed using two ways, and a kind of mode is that thermal state metal pellet is direct
Send in smelting furnace, after separating through fusing, obtain molten point of iron/ferroalloy and melting slag；Another mode is that metallized pellet is first
Through water quenching, crush, then after ore grinding, magnetic separation separation, obtain metallic iron/ferroalloy particles and mine tailing.Wherein, separated using fusing
During mode, energy consumption is higher, but can obtain high-grade and melt a point iron/ferroalloy；When being processed using ore grinding, magnetic separation mode, cost is relatively
Low, but the grinding particle size because requiring is thin, and therefore the energy consumption of grinding process and water consume occupy larger proportion in production cost.
Cyaniding is that current gold mining enterprises produce commonly used method, but cyanide leaching of gold is to pan area ecological environment shadow
Sound is larger, and especially serious to underground water pollution, the security risk of site operation personnel is higher, in some countries and regions cyanidings
Fa Tijin has been restricted use.Thiosulfuric acid salt system is because its effect on environment is little, nontoxic, safety, the golden speed of leaching are fast and
The advantages of cyaniding intractable cupric carbon containing is difficult to smelt ore can be processed, have been considered as being expected to most at present replace cyanide leaching
Go out and reclaim the leaching agent of gold.But because thiosulfate gold extracting process reagents consumption is big and lacks a kind of effectively recovery gold
Method, lead to this method not can apply to industrial production always.The method reclaiming gold from Leaching of Gold Using Thiosulfate liquid has displacement
Method (precipitation method), resin adsorption, charcoal absorption, solvent extraction and electrodeposition metallurgy etc., wherein first two technique study is more, but
Also all there is certain deficiency.Research shows, metallic iron is very big on leaching process impact, has been passivated the leaching of gold, with iron powder
It is also possible to passivation gold is not so that the replacement rate of gold is high during displacement gold.
Chinese patent application publication No. CN 103956487 A discloses one kind and prepares phosphorus using rotary hearth furnace metallized pellet
The method of sour iron lithium, metallized pellet is carried out crushing, grinding, magnetic separation, the multiple operation such as grinding and secondary magnetic separation are processed, then will
Ferrous alloy is used, and technological process is longer；And this invention adopts metallized pellet grinding wet magnetic separation to mix
Material drying and sintering technique, material priority is processed through high temperature low temperature high temperature and dry method Wet-dry method, energy consumption
Higher, thus high expensive；Obtained LiFePO4 is also possible to the impurity brought into because of ferrous alloy and affects its product quality.
Chinese patent application publication No. CN 101200320A discloses a kind of high-carbonaceous metallized pellet for processing waste water and preparation
Method, prepares high-carbonaceous metallized pellet with carbonaceous material and iron-bearing material for raw material, and the method is only applicable to process electrolysis
Filtrate, and need to be in the acidic electrolyte bath aqueous solution, with carbon, iron as anode and cathode, using Fe2+Realize heavy metal with the reduction of carbon
And the reduction recovery of organic pollution, therefore its treatment effect and production cost are all undesirable, and do not enable valuable element
Reclaim, therefore economic benefit is poor.
It would therefore be highly desirable to develop a kind of new processing method of thermal state metal pellet and system, realize thermal state metal ball
Group and the comprehensive utilization of Leaching of Gold Using Thiosulfate liquid, reduce the processing cost of metallized pellet and Leaching of Gold Using Thiosulfate liquid.
Content of the invention
First technical problem to be solved by this invention is to provide a kind of processing method of thermal state metal pellet, the party
Method can output high-quality iron product, elemental gold and iron oxide red, realize thermal state metal pellet, Leaching of Gold Using Thiosulfate liquid
Comprehensive utilization；
Another technical problem to be solved by this invention is to provide a kind of processing system of thermal state metal pellet.
For solving above-mentioned technical problem, the technical solution used in the present invention is：
The present invention discloses a kind of processing method of thermal state metal pellet first, comprises the following steps：(1) by hot gold
Belong to pellet to carry out water quenching, crush, obtain broken material；(2) Leaching of Gold Using Thiosulfate liquid and suppression are added in broken material
Agent, carries out wet grinding, obtains grinding slip；(3) grinding slip is carried out separation of solid and liquid, obtain solid mixture and filtrate；
(4) solid mixture is carried out gravity treatment, obtain elemental gold and light mixture；(5) light mixture is carried out magnetic separation, obtain metal
Iron/ferroalloy particles and mine tailing；(6) add quick lime to carry out precipitation reaction in the filtrate of step (3), obtain through precipitate and separate
Ferrous hydroxide；(7) ferrous hydroxide is calcined, obtained iron oxide red.
Wherein, the described inhibitor of step (2) is fluoride, preferably calcirm-fluoride；Described Leaching of Gold Using Thiosulfate liquid and suppression
The ratio of preparation is：Fluorine ion and the mol ratio of gold ion in Leaching of Gold Using Thiosulfate liquid in inhibitor is controlled to be 1-3：1.Described
Broken material (i.e. thermal state metal pellet through water quenching, broken after product) and the ratio of Leaching of Gold Using Thiosulfate liquid be, control
Broken material (i.e. thermal state metal pellet through water quenching, broken after product) in metallic iron with Leaching of Gold Using Thiosulfate liquid golden from
Mol ratio >=10 of son：1, preferably 10-1000：1.The described Leaching of Gold Using Thiosulfate liquid of step (2) is thiosulfate gold extracting
The waste liquid of method output；Preferably, in described Leaching of Gold Using Thiosulfate liquid, the concentration of gold ion is 0.1-10mg/L.
The processing method of thermal state metal pellet of the present invention, the described thermal state metal pellet of step (1) is chalybeate
The hot product of roasting that pellet group obtains after direct-reduction, its temperature is 800-1000 DEG C；Preferably, according to mass percent
Meter, the degree of metalization of described thermal state metal pellet is 60%-95%, more preferably iron in 80%-95%, and metallized pellet
Main existed with iron granule or ferroalloy particles form.It is broken for being crushed to granularity≤1-3mm described in step (1).According to
Mass percent, in the described grinding slip of step (2), the particle of fineness≤0.074mm accounts for more than 70%；Described grinding slip
The concentration ＜ 0.01mg/L of middle gold ion.
Thermal state metal pellet after water quenching, crushing, is added Leaching of Gold Using Thiosulfate liquid, inhibitor to carry out wet by the present invention
Formula ore grinding；During wet grinding, the metallic iron in metallic iron/ferroalloy particles is replaced with Leaching of Gold Using Thiosulfate liquid
Reaction, generates elemental gold；There is complex reaction with ferric ion in described inhibitor fluoride, generate more stable fluorine iron network
Compound, can suppress the detrimental effect to displacement reaction for the ferric ion.Wet grinding process not only can achieve metallic iron/ferroalloy
The separation of particle and impurity, moreover it is possible to promote the contact with gold leachate for the metallic iron/ferroalloy particles, the ancillary method such as need not stir,
Displacement reaction can occur；Simultaneously with the carrying out of displacement reaction, the grindability of metallic iron/ferroalloy particles improves, and is conducive to
Improve grinding efficiency, and the content of iron in ferroalloy particles can be made to be gradually lowered, from obtained from the higher alloy of grade produce
Product.The addition of quick lime not only can provide hydroxide ion to generate ferrous hydroxide precipitation for precipitation reaction, is obtained through calcining
Iron oxide red, also can reduce the water content in filtrate, reduce post precipitation, the energy consumption of calcination process.
The present invention is found by many experiments, and in Leaching of Gold Using Thiosulfate liquid, gold ion concentration is 0.1-10mg/L, thus,
By control broken material (i.e. thermal state metal pellet through water quenching, broken after product) and Leaching of Gold Using Thiosulfate liquid ratio
Example so that in metallic iron and Leaching of Gold Using Thiosulfate liquid in metallized pellet gold ion mol ratio >=10：1, preferably 10-
1000：1 it can be ensured that gold ion is farthest displaced the gold so that in follow-up waste liquid by the metallic iron in metallized pellet
Ion concentration is less than 0.01mg/L.In fluorine ion and Leaching of Gold Using Thiosulfate liquid in inhibitor, the mol ratio of gold ion is 1-3：1,
Inhibitor thus can be made to play one's part to the full, fluorine ion can fully suppress the suppression of reproducibility ion pair displacement reaction to make
With.If the ratio of fluorine ion and gold ion is less than 1-3：1, then cannot fully play inhibitory action；If fluorine ion and gold ion
Ratio is higher than 1-3：1, then can increase the treating capacity of wet grinding further, and bring more impurity for subsequent technique, be unfavorable for
Obtain high-quality iron product.
The present invention further discloses a kind of system implementing described processing method, including：Metallized pellet processing meanss,
Wet grinding device, equipment for separating liquid from solid, Gravity separation device, magnetic separating device, precipitation separation device and calciner plant.
Wherein, described metallized pellet processing meanss are provided with thermal state metal pellet entrance and broken material outlet；Described
Wet grinding device is provided with broken material entrance, Leaching of Gold Using Thiosulfate liquid entrance, inhibitor entrance and grinding slurry outlet；Institute
State equipment for separating liquid from solid and be provided with grinding slurry inlet, solid mixture outlet and filtrate (liquid；Described Gravity separation device is provided with
Solids mixture inlet, elemental gold outlet and light mixture outlet；Described magnetic separating device is provided with light mixture inlet, metal
Iron/ferroalloy particles outlet and mine tailing outlet；Described precipitation separation device is provided with filtrate inlet, quick lime entrance, hydroxide
Iron outlet and supernatant outlet；Described calciner plant is provided with ferrous hydroxide entrance and iron oxide red outlet.
Further, the broken material outlet of described metallized pellet processing meanss and crushing of described wet grinding device
Material inlet is connected；The grinding slurry inlet phase of the grinding slurry outlet of described wet grinding device and described equipment for separating liquid from solid
Even；The solid mixture outlet of described equipment for separating liquid from solid is connected with the solids mixture inlet of described Gravity separation device；Institute
The light mixture inlet of the light mixture outlet and described magnetic separating device of stating Gravity separation device is connected；Described separation of solid and liquid
The filtrate (liquid of device is connected with the filtrate inlet of described precipitation separation device；The ferrous hydroxide of described precipitation separation device goes out
Mouth is connected with the ferrous hydroxide entrance of described calciner plant.Wherein said wet grinding device can be ball mill.
" being connected " of the present invention can be fixedly connected or be detachably connected；Can be to be mechanically connected, also may be used
To be electrical connection；Can be to be directly connected to or be indirectly connected to by intermediary.
The present invention implements the system of described processing method, and described metallized pellet processing meanss are used for thermal state metal ball
Group carries out water quenching, crushes, and obtains broken material；Described wet grinding device is used for broken material and Leaching of Gold Using Thiosulfate liquid
Carry out wet grinding with inhibitor, obtain grinding slip；Described equipment for separating liquid from solid is used for for grinding slip carrying out separation of solid and liquid,
Obtain solid mixture and filtrate；Described Gravity separation device is used for for solid mixture carrying out gravity treatment, obtains elemental gold and light
Mixture；Described magnetic separating device is used for for light mixture carrying out magnetic separation, obtains metallic iron/ferroalloy particles and mine tailing；Institute
State precipitation separation device for by filtrate and quick lime precipitation reaction, obtaining ferrous hydroxide after precipitate and separate；Described calcining
Device is used for being calcined ferrous hydroxide, obtains iron oxide red.
Technical solution of the present invention compared with prior art, has the advantages that：
The present invention substitutes straight iron powder or iron filings with metallized pellet, is not changing metallized pellet existing main body handling process
On the premise of, by adding Leaching of Gold Using Thiosulfate liquid and inhibitor in wet grinding process, and the ancillary method such as need not stir,
Displacement reaction can occur, reclaim and obtain elemental gold, significantly reduce the processing cost of Leaching of Gold Using Thiosulfate liquid.The present invention is led to
Cross and adopt fluoride inhibitor, and control the mol ratio of gold ion in fluorine ion and Leaching of Gold Using Thiosulfate liquid in inhibitor to be 1-
3：1, fluorine ion can be enable fully to suppress the inhibitory action of reproducibility ion pair displacement reaction.The present invention adopts thiosulfuric acid
Salt gold leachate reduces the water consume of the water consume of water quenching process, grinding process, improves the grindability of metallized pellet, drops further
Low ore grinding energy consumption, reduces the processing cost of metallized pellet, improves economic benefit.The place of thermal state metal pellet of the present invention
It is achieved that the comprehensive utilization of thermal state metal pellet, Leaching of Gold Using Thiosulfate liquid, output high-quality iron produces reason method and system
Product, iron oxide red and elemental gold.
Brief description
Fig. 1 is the structural representation of the processing system of thermal state metal pellet of the present invention；
Fig. 2 is the flow chart of the processing method of thermal state metal pellet of the present invention.
Specific embodiment
To further describe the present invention with reference to specific embodiment, advantages of the present invention and feature will be with description and
Apparent.It should be understood that described embodiment is only exemplary, any restriction is not constituted to the scope of the present invention.This area
Technical staff should be understood that lower without departing from the spirit and scope of the present invention can to the details of technical solution of the present invention and
Form is modified or is replaced, but these modifications or replacement each fall within protection scope of the present invention.
As shown in figure 1, the invention provides a kind of processing system of thermal state metal pellet, including：At metallized pellet
Reason device 1, wet grinding device 2, equipment for separating liquid from solid 3, Gravity separation device 4, magnetic separating device 5, precipitation separation device 6
With calciner plant 7.
Wherein, metallized pellet processing meanss 1 are provided with thermal state metal pellet entrance and broken material outlet；Wet grinding
Device 2 is provided with broken material entrance, Leaching of Gold Using Thiosulfate liquid entrance, inhibitor entrance and grinding slurry outlet；Separation of solid and liquid
Device 3 is provided with grinding slurry inlet, solid mixture outlet and filtrate (liquid；Gravity separation device 4 is provided with solid mixture and enters
Mouth, elemental gold outlet and light mixture outlet；Magnetic separating device 5 is provided with light mixture inlet, metallic iron/ferroalloy particles go out
Mouth and mine tailing outlet；Precipitation separation device 6 is provided with filtrate inlet, quick lime entrance, ferrous hydroxide outlet and supernatant outlet；
Calciner plant 7 is provided with ferrous hydroxide entrance and iron oxide red outlet.
Further, the broken material outlet of metallized pellet processing meanss 1 and the broken material of wet grinding device 2 enter
Mouth is connected；The grinding slurry outlet of wet grinding device 2 is connected with the grinding slurry inlet of equipment for separating liquid from solid 3；Separation of solid and liquid
The solid mixture outlet of device 3 is connected with the solids mixture inlet of Gravity separation device 4；Gently the mixing of Gravity separation device 4
Compound outlet is connected with the light mixture inlet of magnetic separating device 5；The filtrate (liquid of equipment for separating liquid from solid 3 is filled with precipitate and separate
Put 6 filtrate inlet be connected；The ferrous hydroxide outlet of precipitation separation device 6 and the ferrous hydroxide entrance phase of calciner plant 7
Even.
" being connected " of the present invention can be fixedly connected or be detachably connected；Can be to be mechanically connected, also may be used
To be electrical connection；Can be to be directly connected to or be indirectly connected to by intermediary.
The processing system of thermal state metal pellet of the present invention, thermal state metal pellet metallized pelletizing processing meanss 1
Thermal state metal pellet entrance enters metallized pellet processing meanss 1, thermal state metal pellet is carried out water quenching, crushes, obtains
Broken material.The broken material entrance through wet grinding device 2 for the broken material enters wet grinding device 2, and thiosulfate soaks
Golden liquid and inhibitor pass through Leaching of Gold Using Thiosulfate liquid entrance, inhibitor entrance entrance wet grinding device 2, respectively by broken thing
Material carries out wet grinding with Leaching of Gold Using Thiosulfate liquid and inhibitor, obtains grinding slip.Grinding slip is through equipment for separating liquid from solid 3
Grinding slurry inlet enter equipment for separating liquid from solid 3, carry out separation of solid and liquid, obtain solid mixture and filtrate.Solid mixture
Solids mixture inlet through Gravity separation device 4 enters Gravity separation device 4, carries out gravity treatment, obtains elemental gold and light mixing
Thing.The light mixture inlet through magnetic separating device 5 for the light mixture enters magnetic separating device 5, carries out magnetic separation, obtains metal
Iron/ferroalloy particles and mine tailing.The filtrate that grinding slip obtains through equipment for separating liquid from solid 3 precipitation, the filter through precipitation separation device 6
Liquid entrance enters precipitation separation device 6, and quick lime is added precipitation separation device 6, filtrate and quick lime by quick lime entrance
Reaction, obtains ferrous hydroxide.The ferrous hydroxide entrance through calciner plant 7 for the ferrous hydroxide enters calciner plant 7, is forged
Burn, obtain iron oxide red.
Embodiment one
[1] will obtain closing rich in ferronickel after " lateritic nickel ore joins the direct-reduction of carbon pellets rotary hearth furnace " PROCESS FOR TREATMENT
Gold grain, degree of metalization are 80%, and temperature is that 800 DEG C of thermal state metal pellet carries out water quenching, crushes, and obtains below 3mm's
Broken material (flow chart is shown in Fig. 2)；
[2] broken material is sent into ball mill, the concentration adding gold ion is the Leaching of Gold Using Thiosulfate liquid of 10mg/L, fluorine
Change calcium and carry out wet grinding, ore grinding time 40min is so that fluorine ion is 1 with the mol ratio of gold ion：1, control metallized pellet
With the ratio of Leaching of Gold Using Thiosulfate liquid so that metallic iron and the rubbing of gold ion in Leaching of Gold Using Thiosulfate liquid in metallized pellet
That ratio is 10：1, thiosulfate gradually with dilval particle occur displacement reaction generate elemental gold, and with unreacted nickel
Ferroalloy particles, impurity etc. are all levigate to account for more than 70% to below 0.074mm, obtains grinding slip；
[3] grinding slip is carried out separation of solid and liquid, obtain solid mixture and filtrate, wherein solid mixture closes for ferronickel
Gold grain, elemental gold and mine tailing composition, filtrate is the solution containing ferrous ion, and the concentration of its gold ion is less than 0.01mg/L；
[4] solid mixture is carried out gravity treatment, obtain elemental gold and light mixture；
[5] light mixture is carried out magnetic separation, obtain nickel grade be 9.53%, Iron grade be 63.22% high dilval
Particle and mine tailing；
[6] add quick lime in filtrate, make iron ion generate hydroxide iron precipitate, then aoxidized after calcining
Iron oxide red product.
Embodiment two
[1] will obtain rich in low ferronickel after " nickel fibers slag joins the direct-reduction of carbon pellets rotary hearth furnace " PROCESS FOR TREATMENT
Alloying pellet, degree of metalization are 85%, and temperature is that 1000 DEG C of thermal state metal pellet carries out water quenching, crushes, and obtains below 2mm
Broken material；
[2] broken material is sent into ball mill, the concentration adding gold ion is 5mg/L Leaching of Gold Using Thiosulfate liquid, fluorination
Calcium carries out wet grinding, and ore grinding time 30min is so that fluorine ion is 2 with the mol ratio of gold ion：1, control metallized pellet and
The ratio of Leaching of Gold Using Thiosulfate liquid so that in metallized pellet metallic iron with Leaching of Gold Using Thiosulfate liquid gold ion mole
Than for 1000：1, thiosulfate gradually with low dilval particle occur displacement reaction generate elemental gold, and with unreacted
Low dilval particle, impurity etc. are all levigate to account for more than 80% to below 0.074mm, obtains grinding slip；
[3] grinding slip is carried out separation of solid and liquid, obtain solid mixture and filtrate, wherein solid mixture closes for ferronickel
Gold grain, elemental gold and mine tailing composition, filtrate is the solution containing ferrous ion, and the concentration of its gold ion is less than 0.01mg/L；
[4] solid mixture is carried out gravity treatment, obtain elemental gold and light mixture；
[5] light mixture is carried out magnetic separation, obtain the low dilval particle of Iron grade 90.38%, nickel content 1.86%
And mine tailing；
[6] add quick lime in filtrate, make iron ion generate hydroxide iron precipitate, then aoxidized after calcining
Iron oxide red product.
Embodiment three
[1] will obtain rich in metallic iron after " Iron concentrate joins the direct-reduction of carbon pellets rotary hearth furnace " PROCESS FOR TREATMENT
Grain, degree of metalization are 95%, and temperature is that 900 DEG C of thermal state metal pellet carries out water quenching, crushes, and obtains the broken of below 1mm
Material；
[2] broken material is sent into ball mill, the concentration adding gold ion is 0.1mg/L Leaching of Gold Using Thiosulfate liquid, fluorine
Change calcium and carry out wet grinding, ore grinding time 20min is so that fluorine ion is 3 with the mol ratio of gold ion：1, control metallized pellet
With the ratio of Leaching of Gold Using Thiosulfate liquid so that metallic iron and the rubbing of gold ion in Leaching of Gold Using Thiosulfate liquid in metallized pellet
That ratio is 100：1, thiosulfate gradually with iron granule occur displacement reaction generate elemental gold, and with unreacted metal
Iron particle, impurity etc. are all levigate to account for more than 90% to below 0.074mm, obtains grinding slip；
[3] grinding slip is carried out separation of solid and liquid, obtain solid mixture and filtrate, wherein solid mixture is metal
Iron, elemental gold and mine tailing composition, filtrate is the solution containing ferrous ion, and the concentration of its gold ion is less than 0.01mg/L；
[4] solid mixture is carried out gravity treatment, obtain elemental gold and light mixture；
[5] light mixture is carried out magnetic separation, obtain iron granule and the mine tailing of TFe grade 91.16%；
[6] add quick lime in filtrate, make iron ion generate hydroxide iron precipitate, then aoxidized after calcining
Iron oxide red product.
Example IV
[1] will obtain rich in metallic iron after " lateritic nickel ore joins the direct-reduction of carbon pellets rotary hearth furnace " PROCESS FOR TREATMENT
Particle, degree of metalization are 60%, and temperature is that 1000 DEG C of thermal state metal pellet carries out water quenching, crushes, and obtains the broken of below 2mm
Broken material；
[2] broken material is sent into ball mill, the concentration adding gold ion is the Leaching of Gold Using Thiosulfate liquid of 10mg/L, fluorine
Change calcium and carry out wet grinding, ore grinding time 35min is so that fluorine ion is 1 with the mol ratio of gold ion：1, control metallized pellet
With the ratio of Leaching of Gold Using Thiosulfate liquid so that metallic iron and the rubbing of gold ion in Leaching of Gold Using Thiosulfate liquid in metallized pellet
That ratio is 10：1, thiosulfate gradually with dilval particle occur displacement reaction generate elemental gold, and with unreacted nickel
Ferroalloy particles, impurity etc. are all levigate to account for more than 80% to below 0.074mm, obtains grinding slip；
[3] grinding slip is carried out separation of solid and liquid, obtain solid mixture and filtrate, wherein solid mixture closes for ferronickel
Gold grain, elemental gold and mine tailing composition, filtrate is the solution containing ferrous ion, and the concentration of its gold ion is less than 0.01mg/L；
[4] solid mixture is carried out gravity treatment, obtain elemental gold and light mixture；
[5] light mixture is carried out magnetic separation, obtain nickel grade be 10.51%, Iron grade be 61.02% high dilval
Particle and mine tailing；
[6] add quick lime in filtrate, make iron ion generate hydroxide iron precipitate, then aoxidized after calcining
Iron oxide red product.
Contrast test one
Will be after " lateritic nickel ore joins the direct-reduction of carbon pellets rotary hearth furnace " PROCESS FOR TREATMENT, obtaining degree of metalization is 80%
Thermal state metal pellet, after water quenching send into ball mill ore grinding, ore grinding time 50min, obtain fineness and account for for below 0.074mm
More than 70% grinding slip, grinding slip separates through magnetic separation, obtains nickel grade 6.03%, the ferronickel of Iron grade 65.57% closes
Gold grain.
Contrast test two
Will be after " nickel fibers slag joins the direct-reduction of carbon pellets rotary hearth furnace " PROCESS FOR TREATMENT, obtaining degree of metalization is 85%
Thermal state metal pellet, after water quenching send into ball mill ore grinding, ore grinding time 40min, obtain fineness and account for for below 0.074mm
More than 70% grinding slip, grinding slip separates through magnetic separation, obtains the low ferronickel of nickel grade 0.89%, Iron grade 92.35%
Alloying pellet.
Contrast test three
Will be after " iron ore concentrate joins the direct-reduction of carbon pellets rotary hearth furnace " PROCESS FOR TREATMENT, obtaining degree of metalization is 90%
Thermal state metal pellet, sends into ball mill ore grinding, ore grinding time 30min after water quenching, obtains fineness and account for for below 0.074mm
More than 70% grinding slip, grinding slip separates through magnetic separation, obtains the iron granule of Iron grade 92.86%.
Claims (10)
1. a kind of processing method of thermal state metal pellet is it is characterised in that comprise the following steps：
(1) thermal state metal pellet is carried out water quenching, crushes, obtain broken material；
(2) add Leaching of Gold Using Thiosulfate liquid and inhibitor in broken material, carry out wet grinding, obtain grinding slip；
(3) grinding slip is carried out separation of solid and liquid, obtain solid mixture and filtrate；
(4) solid mixture is carried out Gravity separation, obtain elemental gold and light mixture；
(5) light mixture is carried out magnetic separation to separate, obtain metallic iron/ferroalloy particles and mine tailing；
(6) add quick lime to carry out precipitation reaction in the filtrate of step (3), obtain ferrous hydroxide through precipitate and separate；
(7) ferrous hydroxide is calcined, obtained iron oxide red.
2. according to the processing method described in claim 1 it is characterised in that：The described inhibitor of step (2) is fluoride, preferably
Calcirm-fluoride；
The ratio of the described Leaching of Gold Using Thiosulfate liquid of step (2) and inhibitor is：Control fluorine ion and thiosulfuric acid in inhibitor
In salt gold leachate, the mol ratio of gold ion is 1-3：1.
3. according to the processing method described in claim 1 it is characterised in that described broken material and Leaching of Gold Using Thiosulfate liquid
Ratio is：Control mol ratio >=10 of gold ion in metallic iron and Leaching of Gold Using Thiosulfate liquid in broken material：1, preferably 10-
1000：1.
4. according to the processing method described in claim 1 it is characterised in that：The described Leaching of Gold Using Thiosulfate liquid of step (2) is sulphur
The waste liquid of thiosulfate gold extracting method output；
Preferably, in described Leaching of Gold Using Thiosulfate liquid, the concentration of gold ion is 0.1-10mg/L.
5. according to the processing method described in claim 1 it is characterised in that：The described thermal state metal pellet of step (1) is iron content
The hot product of roasting that material pelletizing obtains after direct-reduction, its temperature is 800-1000 DEG C；
Preferably, according to mass percent, the degree of metalization of described thermal state metal pellet is 60%-95%, more preferably
80%-95%.
6. according to the processing method described in claim 1 it is characterised in that：According to mass percent, the described grinding of step (2)
In slip, the particle of fineness≤0.074mm accounts for more than 70%；The concentration ＜ 0.01mg/L of gold ion in described grinding slip；
It is broken for being crushed to granularity≤1-3mm described in step (1).
7. a kind of system implementing processing method described in claim 1 to 6 any one is it is characterised in that include：Metallization ball
Group processing meanss, wet grinding device, equipment for separating liquid from solid, Gravity separation device, magnetic separating device, precipitation separation device and
Calciner plant.
8. according to the system described in claim 7 it is characterised in that：Described metallized pellet processing meanss are provided with thermal state metal
Pelletizing entrance and broken material outlet；
Described wet grinding device is provided with broken material entrance, Leaching of Gold Using Thiosulfate liquid entrance, inhibitor entrance and grinding material
Slurry outlet；
Described equipment for separating liquid from solid is provided with grinding slurry inlet, solid mixture outlet and filtrate (liquid；
Described Gravity separation device is provided with solids mixture inlet, elemental gold outlet and light mixture outlet；
Described magnetic separating device is provided with light mixture inlet, metallic iron/ferroalloy particles outlet and mine tailing outlet；
Described precipitation separation device is provided with filtrate inlet, quick lime entrance, ferrous hydroxide outlet and supernatant outlet；
Described calciner plant is provided with ferrous hydroxide entrance and iron oxide red outlet.
9. according to the system described in claim 8 it is characterised in that：The broken material outlet of described metallized pellet processing meanss
It is connected with the broken material entrance of described wet grinding device；
The grinding slurry outlet of described wet grinding device is connected with the grinding slurry inlet of described equipment for separating liquid from solid；
The solid mixture outlet of described equipment for separating liquid from solid is connected with the solids mixture inlet of described Gravity separation device；
The light mixture outlet of described Gravity separation device is connected with the light mixture inlet of described magnetic separating device；
The filtrate (liquid of described equipment for separating liquid from solid is connected with the filtrate inlet of described precipitation separation device；
The ferrous hydroxide outlet of described precipitation separation device is connected with the ferrous hydroxide entrance of described calciner plant.
10. according to the system described in claim 7 it is characterised in that：Described wet grinding device is ball mill.
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| CN201610795356.8A CN106435191A (en) | 2016-08-30 | 2016-08-30 | Treatment method and system of heat-state metallized pellet |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4654078A (en) * | 1985-07-12 | 1987-03-31 | Perez Ariel E | Method for recovery of precious metals from difficult ores with copper-ammonium thiosulfate |
| CN101063181A (en) * | 2007-06-05 | 2007-10-31 | 昆明贵金属研究所 | Rapid reduction of carbonaceous gold-containing iron ore firing residue pellet gold enrichment by using rotary hearth furnace and method for coproduction of iron powder |
| CN206385233U (en) * | 2016-08-30 | 2017-08-08 | 江苏省冶金设计院有限公司 | A kind of dedicated system for handling thermal state metal pellet |
-
2016
- 2016-08-30 CN CN201610795356.8A patent/CN106435191A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4654078A (en) * | 1985-07-12 | 1987-03-31 | Perez Ariel E | Method for recovery of precious metals from difficult ores with copper-ammonium thiosulfate |
| CN101063181A (en) * | 2007-06-05 | 2007-10-31 | 昆明贵金属研究所 | Rapid reduction of carbonaceous gold-containing iron ore firing residue pellet gold enrichment by using rotary hearth furnace and method for coproduction of iron powder |
| CN206385233U (en) * | 2016-08-30 | 2017-08-08 | 江苏省冶金设计院有限公司 | A kind of dedicated system for handling thermal state metal pellet |
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