CN102459660A - Extraction of gold from cathode associated gold concentrates - Google Patents

Extraction of gold from cathode associated gold concentrates Download PDF

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Publication number
CN102459660A
CN102459660A CN2010800277334A CN201080027733A CN102459660A CN 102459660 A CN102459660 A CN 102459660A CN 2010800277334 A CN2010800277334 A CN 2010800277334A CN 201080027733 A CN201080027733 A CN 201080027733A CN 102459660 A CN102459660 A CN 102459660A
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gold
water
liquid
described method
aforementioned
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D·R·巴特勒
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Precious Metals Recovery Pty Ltd
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Precious Metals Recovery Pty Ltd
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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00Obtaining noble metals
    • C22B11/04Obtaining noble metals by wet processes
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00Obtaining noble metals
    • C22B11/02Obtaining noble metals by dry processes
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00Obtaining noble metals
    • C22B11/06Chloridising
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00Obtaining noble metals
    • C22B11/08Obtaining noble metals by cyaniding
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/04Extraction of metal compounds from ores or concentrates by wet processes by leaching
    • C22B3/06Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
    • C22B3/10Hydrochloric acid, other halogenated acids or salts thereof
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20Treatment or purification of solutions, e.g. obtained by leaching
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/10General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Geochemistry & Mineralogy (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention involves a method for recovering gold from a gold concentrate comprising: dissolving gold from the concentrate in an aqueous liquor to provide a gold liquor; subjecting the gold liquor to electrolysis in an electrowinning cell to provide cathode-associated gold material; leaching the cathode associated gold material in an aqueous liquor under reducing conditions to provide a treated solid residue; and smelting the treated solid residue to recover gold.

Description

From the relevant aurin ore dressing of negative electrode, extract gold
Technical field
The present invention relates to from the aurin ore dressing to extract the method and system of gold, said method and system relate to gold be dissolved in the water-based liquid, electrolytic deposition to be to provide relevant aurin ore dressing of negative electrode and processing washed ore.
Background technology
In many metalworking operations, adopt to cause that gold is dissolved in a series of unit operations in the liquid.The component of liquid is soluble basically, that is, gold number (gold value) moves in the solubility flow.In addition, relevant with raw material insolubility part only exists with low-down concentration.Therefore, for example, can be received in prussiate liquid (the first solubility flow), be absorbed on the carbon, received (or desorb) then from carbon to second more spissated solubility gold flow (strip liquor) from the gold of ore.As other a kind of selection, can directly be received to spissated solubility gold flow from the gold of gravity aurin ore dressing.
Spissated solubility gold flow is conducted in the electrolyzer usually, wherein the effect of electric current cause deposition of gold on the negative electrode or under.This sedimentary gold is called the relevant aurin ore dressing of negative electrode in this manual.
Negative electrode phase customs gold unit does not contain appreciable amount platinum metals (PGM) usually---and this possibly be because few these metals that exist in the raw material, perhaps because certain some indissoluble in these materials and can not moving in the solubility flow that is used for dissolving gold number (being generally the prussiate class).The relevant aurin ore dressing of negative electrode is wherein added fusing assistant usually also through melting processing in the relevant aurin ore dressing of negative electrode, and is being enough to this mixture of temperature heating of fusion fusing assistant and gold.With in the base metal that exists in the relevant aurin ore dressing of negative electrode and the contaminants associated feeding fused of the base metal fusing assistant with the formation slag mutually, said slag after cooling can with precious metal (ingot) physical sepn mutually.Smelting operation is characterised in that, precious metal is assembled with the form of fused button or bar, and said fused button or bar have compares obvious lower surface-area with the surface-area of the relevant washed ore of negative electrode.
The golden reclaimer operation of other kind uses in as the gold recovery of exploitation like the by product in the base metals such as copper and mickel.When the gold in finding raw material combines with the copper of less amount and appreciable amount or other base metals; Impure base metal casting (through fusion) is formed on the anode that uses in the electrolyzer, and the effect of electric current causes copper dissolution (copper of purifying is deposited on the negative electrode simultaneously) in this groove.Accumulate below anode from the undissolved resistates of anodic (gold that comprises any trace), and comprise the anode sludge.The component of the anode sludge is insoluble (in acid electrolyte), and in the solubility flow, does not move.These insoluble component possibly comprise the platinum metals (PGM) and the Jin Heyin of appreciable amount usually.Pollutent in the relevant aurin ore dressing with negative electrode of pollutent in the relevant aurin ore dressing of anode is completely different, and this is because (a) raw material is different; (b) many procedure of processings are different, and particularly in two kinds of different situations, the pollutent in the relevant washed ore of anode does not move in the solubility flow, and the pollutent in the relevant washed ore of negative electrode moves in the solubility flow usually; (c) the relevant aurin ore dressing of anode has been the part of molten metal environment (for example when anode is cast) in the step before the electrolysis, and the relevant aurin ore dressing of negative electrode never was the part of molten metal environment before electrolysis.Anode sludge washed ore uses the successive specialty to leach step processing usually, to reclaim the various valuable component in the various leach liquors.It is reactive comprising the PGM of considerable level and the melting of the anode sludge of gold; This is because melting causes gold and silver and PGM to concentrate in the molten mass and has the surface-area (comparing with the anode sludge) that significantly reduces, and leaches more much more difficult than the selectivity leaching of the primary high surface area anode sludge from the selectivity of the valuable constituent of this low surface area molten mass.
Be usually directed to the melting of negative electrode phase customs gold unit by the current method of the electrorefining negative electrode phase customs gold unit of water-based gold liquid, it did not leach before thermal treatment.
The discussion that comprises in this manual file, behavior, material, device and article etc. only is used to the present invention provides contextual purpose.Do not hint or represent that any or all these things form the common practise in part prior art bases or the association area of the present invention, because it promptly existed before priority date of each claim of the application.
Summary of the invention
The inventor has been found that from the negative electrode phase customs gold unit that electrodeposition process, forms, reclaiming gold can be able to strengthen through making the use reduced liquid leach negative electrode phase customs gold unit.
Therefore, the invention provides a kind of method that from the aurin ore dressing, reclaims gold, said method comprises:
Gold from washed ore is dissolved in the water-based liquid;
In electrodeposition groove, said golden liquid is carried out electrolysis so that the negative electrode gold copper-base alloy of being correlated with to be provided;
Under reductive condition, in water-based liquid, leach the relevant gold copper-base alloy of said negative electrode so that treated solid residue to be provided; With
The said treated solid residue of melting is to reclaim gold.
In one group of embodiment, contain golden liquid and be derived from the desorb of gold from the adsorbed carbon of gold.In another embodiment, fluid supply in the gravity washed ore to the dissolving of gold.
Therefore, aforesaid following method is provided in one group of embodiment, wherein the aurin ore dressing comprises the carbon that is adsorbed with gold, thereby and said method also comprise through contact and come from this carbon that desorb is golden to provide said golden liquid with water-based liquid; And another group provides aforesaid following method in embodiment, and wherein the aurin ore dressing comprises the gravity washed ore, and said method also comprises from the gravity washed ore dissolve gold so that said golden liquid to be provided.
All of this specification sheets describe with claim in, word " comprises " (comprise) and the version (like comprising and comprises) of this speech and be not intended to other additives of eliminating, component, composition or step.
Embodiment
Generally speaking, we find to make the use reduced liquid to leach negative electrode phase customs gold unit provides improved gold to reclaim, and said improved gold reclaims the golden yield that increases several percentage points of ranks is provided usually.Several percentage points increase meaning of gold yield is very great, particularly for large-scale golden recovery activity.
The aurin ore dressing can be to be adsorbed with the carbon adsorbent of gold or can be the ore dressing of gravity aurin.These materials are well known in the art, and in known recovery activity, produce.The concentration of gold is generally at least 0.1 weight % in the washed ore.The concentration that contains gold in the golden liquid that is supplied in the electrolyzer is generally more than 20ppm~2000ppm.
Dissolve gold use liquid is known in the industry, and is preferably prussiate liquid, like sodium cyanide or Potssium Cyanide.Chemical reaction by the prussiate dissolve gold is known as the Elsner equation, and the situation when using sodium cyanide is following:
4Au+8NaCN+O 2+2H 2O→4Na[Au(CN) 2]+4NaOH
Negative electrode phase customs gold unit comprises gold that is deposited on the negative electrode or near the gold that negative electrode, forms, and can for example concentrate in the electrodeposition groove of negative electrode below.
The gravity gold is through the selected gold of gravity method.The selected most important mode of extracting native metal in history that is to use pan or washing table of gravity.Yet, also can use the selected gold of foam floating process.In some cases, gold when being present in the ore particularly as discontinuous coarse particles, the gravity washed ore is direct melting formation gold bar sometimes.In other cases, particularly when gold is present in ore as particulate or from host rock, does not fully disengage, from infusion solution, retrieve to handle washed ore then through the cyaniding leaching.From solution reclaim relate to be adsorbed on the activated carbon and/or electrolysis to form negative electrode correlative sediments thing.
All of this specification sheets describe with claim in, word " comprises " (comprise) and the version (like comprising and comprises) of this speech and be not intended to other additives of eliminating, component, composition or step.
Reduced liquid can be through reductive agent, through contacting with reducing electrode or its combination provides.
Reductive agent preferably holds with the water-based liquid phase, and can be that contain metal or metal-free.The instance of the suitable reductive agent that contains metal comprises the part that contains metal that is in the valence state that is lower than attainable maximum stable valence state in aqueous solution.Preferred metal can be selected from the group of being made up of chromium (CrII), tin (Sn II), copper (Cu I) and titanium (Ti II, Ti III), most preferably tin (Sn II).In a preferred implementation, the water-based reduced liquid comprises stannous ion, for example tin protochloride.
In one group of preferred implementation, the water-based reduced liquid comprises stannous ion (form of tin protochloride more preferably).Be not subject to theory, it is believed that similarly the use that reduction is leached can promote to comprise the dissolving of iron (III) part, and it is believed that these parts cause or partly caused fixing gold.The dissolved evidence that comprises the part of iron III comprises that leaching the back material decolours.Leaching can be carried out in comprising 1%HCl and more than one liquid like reductive agents such as tin protochloride (II), chromium chloride (II) and oxalic acid.Based on observed bleaching level, the effect of reductive agent reduces according to the order of tin protochloride (II) >=chromium chloride (II)>oxalic acid.
The instance of suitable metal-free reductive agent can be selected from by sulphite, oxalic acid, formic acid, hydrazine, comprise acetate acetate, comprise the group that Hydrocerol A sulphite is formed at interior Citrate trianion and hyposulfite, and preferred sulphite and other organic acids.Organic acid is particularly suitable.
The relevant leaching of aurin ore dressing under reductive condition of negative electrode can be used the water-based leaching compsn that is selected from the group of being made up of the mixture of the aqueous solution of the aqueous solution, aqueous acid, water-based chelating agent solution and the sequestrant aqueous solution of alkali and acid or alkali.For example, aqueous reducing agent can be acidic aqueous reduced liquid.As other a kind of selection, the water-based reduced liquid is alkaline water-based reduced liquid.
Preferably, the reduced liquid that contacts at least once with raw material is a tart, and it is about 1.5 that preferred pH is lower than, more preferably less than about 1.0.Preferably, acid is non-oxidizing acid.Preferably, acid is hydrochloric acid.
In a preferred implementation, reductive agent is renewable reductive agent, for example can be by the oxidised form regenerated reductive agent that result produced of conduct through the process of electrolytic regeneration reductive agent.
Present method can also be included in said reduction and leach the step sedimentary aurin ore dressing of leaching in water-based liquid before, and said water-based liquid comprises one or more reagent that are selected from the group of being made up of hydrochloric acid, nitric acid, alkali, sequestrant, carboxylic acid and salt thereof, oxymuriate, perchlorate, muriate, silicofluoride, phenol vitriol and peroxydisulfate.
In one group of embodiment; Present method also comprises in following water-based liquid, carry out at least one leaching step available from the solid residue that in the water-based reduced liquid, leaches, and said water-based liquid comprises the reagent that is selected from the group of being made up of hydrochloric acid, nitric acid, alkali, sugar of lead, sequestrant, carboxylic acid and salt thereof, oxymuriate, perchlorate, muriate, silicofluoride, phenol vitriol and peroxydisulfate.
Can be used in reduction leach before, simultaneously or the instance of the carboxylic acid in the leaching of reduction after leaching comprises formic acid, acetate, lactic acid, Hydrocerol A, isopropylformic acid and like salt such as an alkali metal salt and alkaline earth salts.Can be used in reduction leach before, simultaneously or the muriatic instance in the leaching of reduction after leaching comprise ammonium chloride, sodium-chlor, Repone K, calcium chloride and strontium chloride.
Present method can comprise and relate to a plurality of steps that the relevant gold copper-base alloy of negative electrode contacts with the water-based reduced liquid.
Preferably, contacting in negative first redox potential (Eh) between raw material and the water-based reduced liquid carried out, and contacting at negative the 2nd Eh more between raw material afterwards and the water-based reduced liquid carried out.
Preferably, Eh is at water-based reduced liquid and raw material and remain negative by the whole period of contact between the resistates of its acquisition.
In a preferred implementation of the present invention, raw material or resistates carry out with contacting under the condition that the promotion raw material shifts out from solid surface of water-based liquid.Said condition can comprise ultrasonic agitation.
In one group of embodiment, leach and carry out at least 60 ℃ temperature.
Preferably, compare the standard ingot of raw material and check conspicuous amount in (bullion assay) test, technology of the present invention can cause from raw material, reclaiming more substantial gold.Preferably, with respect to the ingot inspection level, the gold that has more is recovered as at least 1%, and preferably at least 2%, preferably at least 5%.
This optimal process comprises removes liquid from raw material, after it occurs in raw material and the water-based reduced liquid contacts.It is the known solid-liquid separation that can be used for that many method and apparatus are arranged in the industry.For example; This liquid infiltration is collected it through raw material and when flowing out; Can use the known suitable filtration unit of mineral processing industry from slurry, to filter raw material; Perhaps as other a kind of selection, can in known suitable intermittent type in the industry for example or continous way subsider, carry out raw material solid and carry out the gravity separation with liquid.In one embodiment, carry out the step that the raw material under reductive condition contacts with water-based liquid through water paste and the reductive agent that stirs (for example, stirring, vortex or other stirrings) raw material, water paste liquid is removed from raw material through filtration.If desired, can use, but they maybe be more impracticable on technical scale like additive methods such as spinnings.Yet these methods possibly be suitable in the precious metal inspection process, using.
Gold reclaim technology be usually directed to leach step and gold and other precious metals as sorbent materials such as carbon or suitable synthetic resins on absorption.Produced effective gold like the improvement of carbon-in-column process (CIC), carbon-in-leach process (CIL) and carbon-in-pulp process adsorption methods such as (CIP) and reclaimed, sometimes even adjusted the aftertreatment of mill tailings.The suitable liquid wash-out that comprises leaching agent and oxygenant through use to make the precious metal desorb from sorbent material.
In one embodiment, rich auriferous raw material is preferably cathode material or from the negative electrode drift of electrolytic deposition strip liquor, and said strip liquor is as can be used for liquid with precious metal desorption from the carbon etc.Preferably, said cathode material has been processed and has removed Steel Wool.
In another embodiment, rich auriferous raw material comprises the gold that is adsorbed on the carbon.
In a preferred implementation, the reduced liquid that contacts at least once with raw material comprises at least a sequestrant, and preferably it is selected from the group of being made up of beta-diketon, aminopolycarboxylic acid, aminopolycarboxylic acid's salt, carboxylic acid, carboxylate salt and polyphosphonic acid salt.
In a preferred implementation, the material that in the water-based reduced liquid, leaches is segmented.
For example, thus the material that in water-based liquid, leaches can be provided after wet sieving through the particle of at least 80 weight % of 100 microns mesh screens, the more preferably particle of 80 weight % through 30 microns mesh screens by segmentation at least.
In an embodiment of the invention, before this method is included in alternatively in the water-based reduced liquid and leaches, in the water-based reduced liquid, leach after or in the water-based reduced liquid, leach before and processing afterwards.Optional processing can comprise at least one leaching step in water-based liquid, and said water-based liquid comprises the reagent that is selected from the group of being made up of hydrochloric acid, nitric acid, alkali, sugar of lead, ammonium chloride, calcium chloride, strontium chloride, acetate and Hydrocerol A.This optional treatment step preferably is contained in alkali metal hydroxide aqueous solution, aqueous nitric acid, aqueous hydrochloric acid or these the sour mixtures and leaches.This optional treatment step can carry out at the comparatively high temps as 40 ℃~90 ℃, more preferably 60 ℃~80 ℃.Utilize in this embodiment that to carry out this optional processing like stirrings such as ultrasonic agitation possibly be favourable.If desired, this optional processing can be included in the repeatedly leaching that identical or different water-based leach liquor was leached before and/or used afterwards in reduction.
In one embodiment, use the aqueous base solution of pH to handle solid residue from the water-based reduced liquid greater than 13, more preferably greater than 14.In one embodiment, alkali lye comprises at least 5% sodium hydroxide.
In a preferred implementation, can promote difficulty to soak under the condition that material shifts out from the surface of raw material or solid residue, be selected from contact with the water-based reduced liquid with said contact of water-based reduced liquid before or after leaching at least one step.The instance of said condition comprises ultrasonic agitation.
Preferred [0001] ultrasonic agitation of using, particularly, optimized frequency is 10kHz~60kHz, more preferably frequency is the ultrasonic agitation of 20kHz~45kHz.In one group of embodiment, to for example temperature at least 60 ℃ hot dipping fluid using ultrasound ripple.
One group preferred embodiment in; Present method comprises said reduction leaching and acidleach subsequently goes out; The liquid that wherein in reduction is leached, uses comprises hydrochloric acid (hydrochloric acid of preferred 0.5M~5M) and tin protochloride (has 5g~150g in preferred every liter of stannous chloride dihydrate; More preferably in every liter of stannous chloride dihydrate 10g~100g is arranged and then 30g~50g) is more preferably arranged, and the liquid that in follow-up acidleach goes out, uses comprises aqueous nitric acid (preferred about 5%~about nitric acid of 70%, more preferably 20%~60% and then more preferably from about 50%).Go out in follow-up acidleach that the weight ratio of liquid and solid material is preferably 10: 1~100: 1 (being preferably 20: 1~50: 1, more preferably from about 40: 1) in the step.
This method can be included in and make the processing of use reduced liquid before or after leaching.The solid residue of having handled according to the present invention can obtain further refining, with through like means known in the art such as meltings precious metal being provided.In a preferred implementation of the present invention, refinement step comprises said resistates is added into crucible, and said content is heated to smelting temperature.Melting technology can comprise the fusing assistants such as fusing assistant that use as comprise borax, also can be no fusing assistant.
In a preferred implementation,, before adding treated solid residue or solid residue and metal, be placed in the crucible fusing assistant and fusion earlier as initial step.In a preferred embodiment, there is not fusing assistant to mix with the solid residue that treated solid residue perhaps is mixed with metal.
In the technological process of melting gold, the inventor have been found that have usually 1%~3% in addition the gold of more significant quantity run off in slag.Even grind slag and with its part early of introducing golden recovery train again, this slag relevant with gold also is unrenewable basically.
In one group of embodiment of heating steps, the relevant aurin ore dressing of negative electrode is added in the pond of fused in advance of the metal that comprises following material, said material comprises the metal that is selected from copper, silver, gold and platinum metals.In one group of preferred implementation, said material has a kind of in copper, silver, gold and the platinum metals of 80 weight % (preferably at least 90 weight %, more preferably at least 95 weight % and then more preferably at least 99 weight %).
In a preferred implementation, fusion pool has the fusing point above 900 ℃.Preferably, the fusion pool metal has a kind of metal that is selected from the group of being made up of gold and silver and copper.In one group of preferred implementation, metal component is placed near treated solid residue place, the fusion step causes metal component (preferably being selected from gold and silver, copper) fusion.
In one group of embodiment, melting can comprise:
Comprising the fusion pool that is selected from by at least a metal of copper, silver, gold and platinum metals through formation comes melting through the reductive solid residue; With
Be added in the pond of molten metal through the reductive solid residue said.
One group especially preferred embodiment in, fusion pool is formed by particle that comprises treated solid residue and the solid particle mixture that is selected from least a metallic particle in copper, silver, gold and the platinum metals.In this group embodiment, fusion pool metal preferred package argentiferous, copper or its mixture.Preferably resistates and at least a metallic particle mixture that is selected from copper, silver and the gold are added into gradually in the crucible of heating, make in the interpolation process, to form fusion pool, and add other particulate mixture and make it become the part of fusion pool.In one group of embodiment, resistates and at least a metallic particle mixture that is selected from copper, silver, gold and the platinum metals are added in the fusion pool of preformed borax gradually.In another group embodiment, particulate mixture does not comprise the particle of borax or other fusing assistants.
In one group of embodiment, melting method comprises said treated solid residue is added into and comprises before this in the fused pond of at least a metal that is selected from copper, silver, gold and the platinum metals.
In another group embodiment, melting method comprises said treated solid residue is enclosed at least a tinsel or paper tinsel that is preferably selected from copper, silver, gold and the platinum metals.Can carry out this technology to avoid or to reduce contacting of treated solid residue and crucible.
Be used in crucible in the melting and can comprise stupalith (when contacting preferably for corroding comparatively inert stupalith) with vitrified borax.
Melting is preferably carried out in comprising the crucible of carbon that is lower than 10 weight % (preferably being lower than 5%) and the carbide that is lower than 10 weight % (preferably being lower than 5 weight %).
In one group of embodiment, will be added in the fusion pool through the reductive solid residue through pipeline (like the main body that said material the imported fusion pool vitrified pipe in mutually).Preferably, resistates is not touched the wall of the crucible that has fusion pool.
When melting technology was accomplished, fusion pool can be injected in the mould to form ingot bar, ingot or gold and silver bar.
In one aspect of the method, a kind of system that from wrap auriferous washed ore, reclaims gold is provided, said system comprises:
(i) said washed ore is contacted the means with dissolve gold with water-based liquid,
(ii) the product of step (i) is carried out electrolysis so that the electrodeposition groove of negative electrode associated materials to be provided,
(iii) under reductive condition, make the crucible that contacts with the water-based leaching agent from step negative electrode associated materials (ii) and
(iv) melting step product (iii) is to reclaim the means of gold.
In one group of embodiment this system also be included in step (i), the means of use heat or ultrasonic energy (ii) or in arbitrary step (iii).
In a preferred implementation of this system, crucible comprises carbon that is lower than 10 weight % and the carbide that is lower than 10 weight %.
Now through describing the present invention with reference to following examples.Should be appreciated that embodiment provides so that mode of the present invention to be described, they do not limit the scope of the invention extremely.
Embodiment
Embodiment 1
Silver Lake gold gravity washed ore (SLGGC)---raw material
Desorb in the strip liquor that will in corrodibility prussiate and electrodeposition groove, process near the golden gravity washed ore of the metalworking circuit of the Lakewood Gold factory (the Australian Kalgoorlie) of Silver Lake.Compile and in 25%HCl, soaked 2 hours with cathode material with from the cathode deposit in this groove, from sample, to leach Steel Wool.The cleaning and removing residual material is also dry, to obtain the 12.5kg raw material.Obtain and assemble many these materials that grasped, to obtain the 500g material sample.
Come the homogenizing raw material through crushing and fragmentation, and be divided into the sub-sample of a plurality of 10g at random.Be committed to Perth Mint (Hay St Street, East Perth, western australia) to carry out the ingot analysis with 6 in these sub-samples.The ingot assay is:
Sub-sample weight Gold number (ingot check) Silver number (ingot check)
10.17g 60.43% 7.79%
10.05g 60.37% 7.65%
10.03g 60.05% 7.59%
10.01g 60.37% 7.62%
10.02g 60.63% 7.68%
10.06g 60.53% 7.75%
On average=60.4% On average=7.68%
Embodiment 2
Step is leached in reduction about SLGGC
One of sub-sample of the above-mentioned SLGGC of 10g is added in the beaker that has the liquid that comprises 200ml 50%HCl and 8g tin protochloride.The content of beaker is heated to 80 ℃, and after 5 minutes, beaker is placed in " Soniclean160T " ultra sonic bath (bath water is 60 ℃, and frequency is 40kHz, and peak power is 250W, and power setting is the 60%=150W of 250W).After the ultrasonic agitation 5 minutes, this beaker is reheated and cycle repeats 2 times.Obtain resistates through filtering, and it is washed in water and drying.Find that (not melting) resistates has the color more shallow than initial 10g sub-sample, it is delivered to Perth Mint to carry out the ingot analysis, concurrent cash content (per-cent with the 10g parent material is represented) rises to 61.77% by 60.42% in the parent material.
Leach the alkali leaching step of back in reduction about SLGGC
Sub-sample to 10g SLGGC raw material provides aforesaid reduction to leach.In the future the autoreduction resistates that leaches step is added in the caustic lye of soda of 200ml 10%, and be warming up to 80 ℃ 5 minutes, carry out the ultrasonic agitation described in 3 round-robin such as the above embodiment subsequently.Through filter obtaining result's resistates, and it wash in water and drying.Resistates that will (not melting) result is delivered to Perth Mint and is carried out the ingot analysis, finds that gold content (per-cent with the 10g parent material is represented) rises to 61.94% by 60.4% in the parent material.
Embodiment 3
The carbon-in-pulp process washed ore (SLGCIP) of Silver Lake gold
Will be near the desorb in the strip liquor that golden charcoal processes in corrodibility prussiate and electrodeposition groove of carrying of the CIP metalworking circuit of the Lakewood Gold factory (the Australian Kalgoorlie) of Silver Lake.Compile and in 25%HCl, soaked 2 hours with cathode material with from the cathode deposit in this groove, from sample, to leach Steel Wool.The cleaning and removing residual material is also dry, to obtain the 12.5kg raw material.Homogenizing raw material in the kitchen stirrer, and be divided into the sub-sample of a plurality of 10g at random.Be committed to Perth Mint (Hay St Street, East Perth, western australia) to carry out the ingot analysis with 6 in these sub-samples.The ingot assay is:
Sub-sample weight Gold number % (ingot check) Silver number % (ingot check)
10.05g 36.46 7.48
10.00g 36.44 7.47
10.03g 36.47 7.41
10.09g 36.33 7.48
10.00g 36.48 7.48
10.08g 36.30 7.41
On average=36.41% On average=7.46%
Embodiment 4
Step is leached in reduction about the SLGCIP raw material
One of 10g sub-sample is added in the beaker that has the liquid that comprises 200ml 50%HCl and 8g tin protochloride.The content of beaker is heated to 80 ℃, and after 5 minutes, beaker is placed in " Soniclean 160T " ultra sonic bath (bath water is 60 ℃, and frequency is 40kHz, and peak power is 250W, and power setting is the 60%=150W of 250W).After the ultrasonic agitation 5 minutes, this beaker is reheated and cycle repeats 2 times.Obtain resistates through filtering, and it is washed in water and drying.
Alkali about the SLGCIP raw material leaches step
In the future the autoreduction resistates that leaches step (as stated) is added in the caustic lye of soda of 200ml 10%, and be warming up to 80 ℃ 5 minutes, carry out 3 aforesaid ultrasonic agitation of round-robin subsequently.Through filter obtaining result's resistates, and it wash in water and drying.Resistates that will (not melting) gained is delivered to Perth Mint and is carried out the ingot analysis, finds that gold content (per-cent with the 10g parent material is represented) rises to 37.52% by 36.4% in the parent material.Find that silver content rises to 7.58% by 7.46% in the parent material.
Melting
The sub-sample of 10g SLGCIP raw material is leached step through leaching step according to the reduction of above scheme with alkali, and will be added into the 30g fire from the dried resistates that alkali leaches step and check in the crucible.The crucible that has loaded is placed on the inside of the electric furnace that is preheated to 1220 ℃, and kept this temperature 1.5 hours.When crucible is taken out from stove, its have comprise fused gold and the dark solid phase that is attached to crucible bottom fluid mutually.Liquid phase is injected button mould, realize separating of neatly and orderly with dark solid phase.After the cooling, from mould, take out button and send to and carry out the ingot check.The heavy 1.5g of dark solid phase.The dark solid phase of a part (0.41g) is added in the freshly prepd chloroazotic acid of 250ml (1 part of concentrated nitric acid and 4 parts of concentrated hydrochloric acids) in 80 ℃ the beaker.After 5 minutes, beaker is placed in the Soniclean 160T ultra sonic bath (bath water is 60 ℃, and frequency is 20kHz, bathes the intensity that is set to 250W).After the ultrasonic agitation 5 minutes, this beaker is reheated and cycle repeats 2 times.The 50ml concentrated hydrochloric acid is added in the beaker, and beaker is heated once more, 60 ℃ carry out extra for the time 5 minutes ultrasonic agitation.Filter the liquid in the beaker afterwards immediately, and send to through flame atomic absorption spectrometry (flame AAS) and carry out the gold check.The gold content of finding button is 2.64g, and finds that the leaching check gold content of dark solid resistates is 1.06g.The total amount of the gold that from the 10g sub-sample, reclaims thus rises to 3.73g by the 3.64g in the original material.
Embodiment 5
Silver Lake gold gravity washed ore (SLGGC)---raw material
Step is leached in reduction about SLGGC
The sub-sample for preparing 10g Silver Lake gold gravity washed ore (SLGGC) as previously mentioned.Gold number in each sub-sample (through the ingot check) is 60.4%.
10.06g sub-sample (particle diameter is lower than 250 microns) is added in the beaker of 500ml.To comprise 8g stannous chloride dihydrate (dissolved), the dense HCl of 100ml and 100ml water and be added in the beaker, and beaker will be placed 60 ℃ hot ultra sonic bath (Soniclean, in the peak power=250W) 8 hours.Stir (60% maximum the setting) according to following scheme using ultrasound: initial ultrasound was handled in 10 minutes, suspended in 80 minutes, and 10 minutes supersound process were suspended in 80 minutes, and the rest may be inferred finished to time period of 8 hours.Do not use mechanical stirring.
After 8 hours, with the content filtration (Whatman 40 ashless filter papers, filtration velocity is suitable with Whatman 2) of beaker, and with the resistates on the water washing filter paper.Resistates is washed to the beaker of another 500ml from paper subsequently, uses the water that is less than 100ml to realize this transfer carefully.Make the horizontal plane in the beaker reach 100ml, and add the aqueous sodium hydroxide solution of 100ml 8%, to be provided for second 4% the final corrodibility leach liquor that leach.Beaker is placed in the hot ultra sonic bath, and handles according to such scheme.After filtering and washing, dried residue is spent the night in 80 ℃ baking oven.Through using the simple mechanical stimulus of spatula, thereby the resistates cake is easy to be destroyed and becomes fine powder.
Buy 100g silver particulate (silver more than 99.9%) by PW Beck&Co silver dealer (Adelaide, Australia).The diameter of particulate is about 2mm.Also can buy the sheet silver that diameter is the every heavy 10g of 0.3mm (thin silver level) from PW Beck&Co.
Particulate is placed in the 250ml fire check crucible available from Furnace Industries (Perth, Australia).The crucible that has loaded is placed on electric furnace inside and makes it reach 1220 ℃.Form a Xiao Chi from particulate fused silver in crucible bottom.
To wrap in the sheet silver of 10g a slice from the exsiccant resistates of above-mentioned corrodibility leaching step.From stove, take out the hot crucible that has silver-colored pond, and the silver strip covering is dropped in the crucible, it is located immediately on the fused silver pond.The fusion rapidly of sheet silver, and the content of silver strip covering immerses in the silver-colored pond, do not contact with crucible wall.Crucible is returned in the stove, get back to 1220 ℃, and kept this temperature 15 minutes.The fusion content of hot crucible is injected hemispherical button mould, and make its cooling.From mould, take out button and, make its drying then at quenching-in water.Probably being of a size of of hemispherical button: diameter 4cm, maximum height 3cm.Button boring to obtain about 6g smear metal and drilling cuttings, is delivered to Umpire test experiment chamber (Perth, Australia) with them and carried out the ingot check.
Initial 10.06g sub-sample comprises 60.4% gold (for the repeatedly ingot analytical results of aliquots containig sample).The gold that is reclaimed by above-mentioned button is 6.16g, and the bronsted lowry acids and bases bronsted lowry before melting leaches in the step and detects 0.14g gold (altogether) on the employed filter paper.This by contrast, checks expection to be recovered to 10.06 * 0.604=6.076g for the ingot of initial sub-sample corresponding to from initial sub-sample, reclaiming 6.3g gold altogether.0.368g the benefit that the method for golden incremental representation the application of the invention obtains.
Embodiment 6
Silver Lake gold gravity washed ore (SLGGC)---raw material (a)
Will be near the desorb in the strip liquor that golden charcoal processes in corrodibility prussiate and electrodeposition groove of carrying on the gravity gold thread road of the Lakewood Gold factory (the Australian Kalgoorlie) of Silver Lake.Compile and in 25%HCl, soaked 2 hours with cathode material with from the cathode deposit in this groove, from sample, to leach Steel Wool.The cleaning and removing residual material is also dry, to obtain the 12.5kg raw material.Through crushing with broken with the homogenizing raw material, and be divided into the sub-sample of a plurality of 10g at random.Except that the 10g sub-sample, also use the remainder of standard Silver Lake technology melting material, and find that the gold that can commerciality reclaims is 77.06% gold.
Silver Lake gold carbon-in-pulp process (CIP) washed ore---raw material (b)
Will be near the desorb in the strip liquor that golden charcoal processes in corrodibility prussiate and electrodeposition groove of carrying of the C-I-P circuit of the Lakewood Gold factory (the Australian Kalgoorlie) of Silver Lake.Compile and in 25%HCl, soaked 2 hours with cathode material with from the cathode deposit in this groove, from sample, to leach Steel Wool.The cleaning and removing residual material is also dry, to obtain the 12.5kg raw material.Through crushing with broken with the homogenizing raw material, and be divided into the sub-sample of a plurality of 10g at random.Except that the 10g sub-sample, also use the remainder of standard Silver Lake technology melting material, and find that the gold that can commerciality reclaims is 35.04% gold.
Step is leached in reduction
Get the 10g sub-sample, and it is added in the reduced liquid.Described in the first part of extract technology such as embodiment 4 (" step is leached in the reduction about the SLGCIP raw material ").
Attention: if reduction is leached is not the first leaching step, the leaching resistates of the leaching step before then using.Attention is used as the initial raw material that leaches in the step with the 10g sub-sample.
Alkali leaches step
Get the 10g sub-sample, and it is added in the alkali lye.Alkali leaches described in the second section (" alkali about the SLGCIP raw material leaches step ") like embodiment 4.
Attention: if alkali leaches is not the first leaching step, the leaching resistates of the leaching step before then using.Attention is used as the initial raw material that leaches in the step with the 10g sub-sample.
In 50% nitric acid, leach
Get the 10g sub-sample, and it is added in 200ml 50% nitric acid liquid.Carry out ultrasonic agitation, filtration, flushing and the drying described in the first part's (" step is leached in the reduction about the SLGCIP raw material ") like embodiment 4.
Attention: if acidleach goes out not to be that first leaches step, the leaching resistates of the leaching step before then using.Attention is used as the initial raw material that leaches in the step with the 10g sub-sample.
The borax melting
Filter and dry washed ore of leaching; This material of 20g is mixed with the 20g borax and is added into crucible, and in electric furnace with this crucible be heated to 1220 ℃ 1.5 hours.The fused material is injected into the mould and makes its cooling from crucible.Take out the content of mould, and remove slag from this precious metal button.Button is weighed, and the button sample is delivered to Perth Mint to confirm the concentration of gold in the button.
Calculate the gold content of raw material (that is, leaching the relevant aurin ore dressing of employed initial negative electrode in the sequence).
Silver pond melting
Get 100g silver particulate, it is added in the crucible and in electric furnace, is heated to 1220 ℃.Cut-off directly be the sheet silver (thin silver level, every of 10g) of 0.3mm and with this sheet parcel with the fine material of melting (this material be before the resistates that is left after about the leaching step of 10g sub-sample) to form silver-colored covering.From stove, take out the hot crucible that has fused silver, and with silver-colored covering input wherein.Immediately this crucible is sent back in the stove, and reheat to 1220 ℃ 15 minutes.The fused content of hot crucible is injected button mould and makes its cooling.Remove slag and to button boring to obtain to be used for the smear metal and the drilling cuttings of ingot check.
With on the filter paper with infusion solution in residual gold be added in the chloroazotic acid, and the gold that will find in this way is added in the ingot numbering.
Table 1
Figure BDA0000123199720000141
Table 2
Figure BDA0000123199720000142
Embodiment 7
Silver Lakes---obtain 500.97g silk gold (being called CIP-2) from Silver City Mining Company, identical to its description with description from the material in the Silver Lake Resources CIP workshop of Lakewood Gold factory.Obtain this sample through representative sampling from the silk gold that after the salt s.t. of removing cathod filament, carries out is produced, and the gold grade of definite sample (by calculating through the commercial melting of ingot having been carried out golden definite production sample from the ingot check of Perth mint).Find that gold content is 35.04 weight %.
Presmelting is handled
10g CIP-2 (through the representative sub-sample of random assignment acquisition) is added in the aqueous nitric acid of the 200ml50 volume % in the 600ml beaker.The hot ultra sonic bath that this beaker is placed on 60 ℃ (in " Soniclean " board, peak power=250W), and stirred 1 hour with peak power.Filtering liquid, and water debris.
To be added into through the resistates of water washing in the liquid that contains 8g tin protochloride dehydrate (through dissolving), 100ml concentrated hydrochloric acid and 100ml water in the 600ml beaker.The hot ultra sonic bath that this beaker is placed on 60 ℃ (in " Soniclean " board, peak power=250W), and stirred 1 hour with peak power.Filtering liquid, and water debris.
Will from before the resistates through water washing of step be added in the aqueous nitric acid of the 200ml 50 volume % in the 600ml beaker.The hot ultra sonic bath that this beaker is placed on 60 ℃ (in " Soniclean " board, peak power=250W), and stirred 1 hour with peak power.Filtering liquid, the water debris, and dry.
Through the liquid check gold of standard technique to being produced in all filter paper and the above operation.
Melting is handled
Figure BDA0000123199720000151
Attention: in above 3 meltings, particulate mixture is placed in the 250ml fire check crucible available from the Furnace Industries of Australian Perth.The crucible that has loaded is placed on the inside of electric furnace and makes it reach 1220 ℃, kept this temperature 15 minutes.The fusion content of hot crucible is injected the hemispherical button mould through preheating, and make its cooling.From mould, take out button and, make its drying then at quenching-in water.Separate slag, and this button is delivered to Umpire test experiment chamber (Perth, Australia) carry out the ingot check.
Total golden yield (from melting and solution/filter paper)
Figure BDA0000123199720000152

Claims (43)

1. one kind is reclaimed golden method from the aurin ore dressing, and said method comprises:
In water-based liquid from said washed ore dissolve gold so that golden liquid to be provided;
In electrodeposition groove, said golden liquid is carried out electrolysis so that the negative electrode gold copper-base alloy of being correlated with to be provided;
Under reductive condition, in water-based liquid, leach the relevant gold copper-base alloy of said negative electrode so that treated solid residue to be provided; With
The said treated solid residue of melting is to reclaim gold.
2. the method for claim 1, wherein said aurin ore dressing comprise the carbon that is adsorbed with gold, and said method also comprises through contacting from said carbon with water-based liquid and makes golden desorb so that said golden liquid to be provided.
3. the method for claim 1, wherein said aurin ore dressing comprises the gravity washed ore, and said method also comprises from said gravity washed ore dissolve gold so that said golden liquid to be provided.
4. each described method as in the aforementioned claim wherein leaches the relevant gold copper-base alloy of said negative electrode and relates to and use the water-based leaching compsn that is selected from the group of being made up of the mixture of the aqueous solution of the aqueous solution, aqueous acid, water-based chelating agent solution and the sequestrant aqueous solution of alkali and acid or alkali under reductive condition.
5. like each described method in the aforementioned claim, wherein said water-based reduced liquid is acidic aqueous reduced liquid, and preferably pH is lower than about 1.
6. like each described method in the aforementioned claim, wherein said water-based reduced liquid is alkaline water-based reduced liquid.
7. like each described method in the aforementioned claim; Wherein said method also is included in said reduction and leaches the step said sedimentary aurin ore dressing of leaching in water-based liquid before, and said water-based liquid comprises one or more reagent that are selected from the group of being made up of hydrochloric acid, nitric acid, alkali, sugar of lead, sequestrant, carboxylic acid and salt thereof, oxymuriate, perchlorate, muriate, silicofluoride, phenolsulfonate and peroxydisulfate.
8. like each described method in the aforementioned claim; Wherein said method also comprises in water-based liquid, carry out at least one leaching step available from the said solid residue that leaches in the water-based reduced liquid, and said water-based liquid comprises the reagent that is selected from the group of being made up of hydrochloric acid, nitric acid, alkali, sugar of lead, sequestrant, carboxylic acid and salt thereof, oxymuriate, perchlorate, muriate, silicofluoride, phenolsulfonate and peroxydisulfate.
9. method as claimed in claim 8, wherein said one or more water-baseds leach step and are promoting under the condition that refractory gold shifts out from said solid surface, preferably carrying out at least 60 ℃ temperature.
10. contacting under the condition of ultrasonic agitation between the method as claimed in claim 9, wherein said raw material or resistates and water-based liquid carried out.
11. the method that reclaims gold as claimed in claim 10, wherein the mixture to relevant aurin ore dressing of said negative electrode and reduced liquid carries out ultrasonic radiation in the frequency of 10kHz~60kHz, preferred 20kHz~45kHz.
12. as each described method in the aforementioned claim, wherein said negative electrode comprises Steel Wool, and said method comprise handle said precipitated gold copper-base alloy is arranged negative electrode to remove said Steel Wool.
13. like each described method in the aforementioned claim, said method comprises a plurality of steps that the relevant gold copper-base alloy of said negative electrode contacts with the water-based reduced liquid that relate to.
14. as each described method in the aforementioned claim, wherein said reductive condition is through providing said liquid with being selected to be contacted with at least a restoring system in the group that reducing electrode is formed by reductive agent.
15. one kind like each described process in the aforementioned claim; Wherein said reductive condition provides through following reductive agent: with at least a reductive agent that the water-based liquid phase is held, said reductive agent preferably comprises also tin (Sn II) most preferably of the metallics that is selected from the group of being made up of chromium (CrII), tin (Sn II), copper (Cu I) and titanium (Ti II, Ti III); With metal-free reductive agent, said metal-free reductive agent is preferably selected from sulphite, has the organic acid and the oxalic acid of sulphite.
16. like each described method in the aforementioned claim, wherein said water-based reduced liquid comprises stannous ion, is preferably the form of tin protochloride.
17. as each described method in the aforementioned claim; Said method comprises said reduction leaching and acidleach subsequently goes out; The liquid that wherein in said reduction is leached, uses comprises the inferior tin of chlorination of hydrochloric acid; The hydrochloric acid of preferred 0.5M~5M and the stannous chloride dihydrate of preferred 5g/L~150g/L, more preferably stannous chloride dihydrate and then the more preferably stannous chloride dihydrate of 30g/L~50g/L of 10g/L~100g/L; And the said liquid that in said follow-up acidleach goes out, uses comprises aqueous nitric acid, preferred about 5%~about nitric acid of 70%, more preferably 20%~60% and then more preferably from about 50%.
18. method as claimed in claim 17, wherein the weight ratio of liquid and solid material is 10: 1~100: 1 in said follow-up leaching step, is preferably 20: 1~50: 1, more preferably from about 40: 1.
19. like each described method in the claim 14~16, said method also comprises the leaching of the said solid residue that leaches in the comfortable water-based reduced liquid being used alkali lye.
20. method as claimed in claim 19, wherein said aqueous base solution have greater than 13, the pH more preferably greater than 14.
21. like claim 19 or the 20 described methods that reclaim gold, wherein said alkali lye comprises at least 5% sodium hydroxide.
22. like each described method in the aforementioned claim, wherein said reduced liquid comprises at least a reagent that is selected from organic acid and the salt thereof.
23. like each described method in the aforementioned claim, wherein said reduced liquid comprises at least a base metal sequestrant, it is preferably selected from the group of being made up of beta-diketon, aminopolycarboxylic acid, aminopolycarboxylic acid's salt, carboxylic acid, carboxylate salt and polyphosphonic acid salt.
24. like each described method in the aforementioned claim, the said material that wherein carries out in the water-based reduced liquid, leaching is segmented.
25. as each described method in the aforementioned claim, the said material that carries out in water-based liquid, leaching through wet sieving provide at least 50 weight % through 100 microns mesh screens particle and by segmentation at least 80 weight % of 100 microns mesh screens (more preferably through).
26. as each described method in the aforementioned claim, the melting of wherein said resistates in crucible carried out not adding under the fusing assistant.
27. like each described method in the claim 1~25, the melting of wherein said resistates is carried out in the presence of the borated fusing assistant of preferred package.
28. like each described method in the aforementioned claim, the said resistates of wherein said processing comprises formation with the step that reclaims gold and comprises the fusion pool that is selected from least a metal in copper, silver, gold and the platinum metals.
29. method as claimed in claim 28, wherein said fusion pool is formed by particle that comprises treated solid residue and the solid particle mixture that is selected from least a metallic particle in copper, silver, gold and the platinum metals.
30. like claim 28 or 29 described methods, wherein said fusion pool is injected in the mould to form ingot bar, ingot or gold and silver bar.
31. like each described method in the claim 28~30, wherein said fusion pool has the fusing point above 900 ℃.
32. like each described method in the claim 28~31, wherein the fusion pool metal comprises silver, copper or its mixture.
33. like each described method in the claim 28~32; Wherein said resistates and at least a metallic particle mixture that is selected from copper, silver, gold and the platinum metals are added into gradually in the crucible of heating; Make in the interpolation process, to form fusion pool, and add other particulate mixture and make it become the part of said fusion pool.
34. like each described method in the claim 28~33, wherein with said resistates be selected from the fusion pool that at least a metallic particle mixture in copper, silver, gold and the platinum metals is added into preformed borax gradually.
35. method as claimed in claim 34, wherein said particulate mixture does not comprise the particle of borax or other fusing assistants.
36. as each described method in the aforementioned claim, wherein said fusion step comprise with said treated solid residue be added into comprise at least a metal that is selected from copper, silver, gold and the platinum metals before this in the fused pond.
37. like each described method in the aforementioned claim, wherein the said treated solid residue of part is closed at least a tinsel or paper tinsel that is preferably selected from copper, silver, gold and the platinum metals at least.
38. as each described method in the aforementioned claim, wherein said melting is carried out in crucible, said crucible comprises stupalith, preferably comparatively inert stupalith, more preferably clay in the fused borax.
39. as each described method in the aforementioned claim, wherein said be melted in to comprise be lower than 10 weight %, preferably be lower than the carbon of 5 weight % and be lower than 10 weight %, preferably be lower than in the crucible of carbide of 5 weight % and carry out.
40. a system that from wrap auriferous washed ore, reclaims gold, said system comprises:
(i) said washed ore is contacted the means with dissolve gold with water-based liquid,
(ii) the product to step (i) carries out electrolytic electrodeposition groove,
(iii) under reductive condition, make the crucible that contacts with the water-based leaching agent from step negative electrode associated materials (ii) and
(iv) melting step product (iii) is to reclaim the means of gold.
41. system as claimed in claim 40, said system also are included in step (i), the means of heat application or ultrasonic energy (ii) or in arbitrary step (iii).
42. like each described system in claim 40 or 41, wherein said crucible comprises carbon that is lower than 10 weight % and the carbide that is lower than 10 weight %.
43. like each described method in the claim 1~39, it is similar that its basic and the arbitrary embodiment of reference describe in this article.
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