CN105779782A - Pulp gold extracting process with steps divided in thin pulp screening mode - Google Patents

Pulp gold extracting process with steps divided in thin pulp screening mode Download PDF

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CN105779782A
CN105779782A CN201610203848.3A CN201610203848A CN105779782A CN 105779782 A CN105779782 A CN 105779782A CN 201610203848 A CN201610203848 A CN 201610203848A CN 105779782 A CN105779782 A CN 105779782A
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gold
pulp
sieve
rare
ore pulp
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CN105779782B (en
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周庆华
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Kunming University of Science and Technology
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Kunming University of Science and Technology
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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
    • C22B1/00Preliminary treatment of ores or scrap
    • 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
    • C22B3/22Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
    • C22B3/24Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition by adsorption on solid substances, e.g. by extraction with solid resins
    • 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

Abstract

The invention discloses a pulp gold extracting process with the steps divided in a thin pulp screening mode. Thin-pulp-screening concentration is performed on fine ground pulp so as to separate pulp above a screen and pulp below the screen, and then leaching is performed on the pulp above the screen; in a multistage process, the thin-pulp-screening concentration or thin-pulp-screening filtration is performed on the pulp which is leached in advance, so as to separate the pulp below the screen, the screened thin pulp is treated with activated carbon or resin, and conventional pulp gold extracting methods are used in a combination mode at a later stage. The thin-pulp-screening concentration is implemented by using a push-pull type folding screen manufactured in the patent CN201520280642.1 or a vibrating type folding screen manufactured in the patent CN201520280643.1 of an inventor, and the thin-pulp-screening filtration is implemented by using a filter press which uses meshes as filter media. The pulp gold extracting process has the advantages that clarifying concentration is replaced by the thin-pulp-screening concentration, the dehydration is quick, the manufacturing cost is low, the dehydration effect of the folding screen can be fully achieved, and the desliming procedure of the thin pulp in a sedimentation tank can be omitted; for the multistage process in which the activated carbon is used for adsorption, the wear of the thin pulp on gold and silver enriched carbon is less, and gold and silver which run away along with carbon dust are less.

Description

The ore pulp extraction of gold process of substep is carried out in the way of sifting out thin liquid pulp
Technical field
The present invention relates to the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp, belong to noble metal selecting and smelting technology field.
Background technology
At present, reclaiming gold silver and generally adopt carbon-in-pulp process from Gold Ore or Gold Concentrate under Normal Pressure, carbon-in-pulp process has two kinds of flow process collocation forms, and one is adsorption process after first leaching, and is called for short CIP flow process, and another kind is leaching limit, limit adsorption process, is called for short CIL flow process.Known carbon-in-pulp process CIP and CIL flow process are as it is shown in figure 1, the defect part of carbon-in-pulp process CIP and CIL and resin in pulp process is in that:
1) granularity requirements of levigate ore pulp is more thin, its pulp density is more rare, thus it is accomplished by the ore pulp before leaching is concentrated, so not only improve and reduce the volume leaching agitator tank, be also beneficial to the ore pulp after leaching directly is filtered, concentrator can be selected for this to concentrate by existing technology, though the overflow of clarification so can be separated, but owing to concentrator build is big and need to be risen by its pond underframe, the antiseep of concentrator is required also high, so Civil Cost is just high;Performing an analysis with the normal conditions of all sliming cyanidation, by concentrator feed pulp density 28%, underflow pulp density 40%, can calculate the liquid holdup still having 58% in underflow, if by underflow pulp density 55%, the liquid that can calculate in underflow drops to 32%;Owing to the type selecting of concentrator being clarified by overflow, being the span of 40%~60% for underflow pulp density, the concentrator specification thus calculated is equally big;If for leaching the concentration before adsorption operation, only by slurry concentrating to 40%, therefore need to go up more investment for concentrator consumption, but not allow concentration usefulness be not fully exerted;And if for laundry operation, underflow pulp density is more high, and the liquid fraction in underflow is more few, and detersive efficiency is more high, but can only achieve 55%~60% with concentrator concentration, it is difficult to mention higher;
2) pulp density of carbon-in-pulp process should be suitable for leaching requirement, avoid again activated carbon in cell body on drift or sink, therefore levigate ore pulp need to first concentrated just can feed in carbon-in-pulp process CIP or CIL flow process, according to inflate the pachuca stirred, avoid dense ore pulp deep gouge, the power consumption of required compressed-air system is relatively big, seldom uses now;The at present leaching equipments adopting mechanical agitation to add inflation, wherein inflation meets gold silver and dissolves required oxygen, and the disperse of oxygen and dissolving, the diffusion of reactant and mass transfer all need the impeller rotated to provide stirring intensity that ore pulp is necessary more;But owing to activity carbonaceous is crisp frangible, not wear-resistant, phase mutual friction between activated carbon with stirring blade and baffle plate, meeting generating section particulate charcoal, when adverse current carries charcoal, because being difficult to have this partial adsorbates the particulate charcoal of gold silver to separate from ore pulp, and run off in mine tailing, thus can cause the loss of gold silver;
3) for resin in pulp process, although resin has smooth surface, mechanical strength height, little advantage of wearing and tearing, but owing to the density of wet resin is 1.04t/m3Left and right, and the density 1.32t/m of wet coconut husk charcoal3, density during pulp density 40% is also 1.32t/m3, the density contrast of wet resin and ore pulp is easily caused on resin and floats, and destroys good contact and the mass transfer of resin and ore pulp;In order to avoid resin upper drift in a large number, need to being made by resin size less, make resin be more easy to and flow with ore pulp, but resin size is more little, gold loaded resin is more difficult with separating of ore pulp;For this, it is common practice to compromising, resin size is more slightly smaller, make resin dispersion in ore pulp somewhat uniform, realize separating of gold loaded resin and ore pulp.
Flowage structure from known carbon-in-pulp process CIP and CIL and resin in pulp process, it leaches to adsorb to intersect with washing and solid-liquid separation and carries out, if therefore changing original in clarify concentration for the main mode carrying out solid-liquid separation, it is possible to change the model of action leaching, adsorbing and wash.
The one of which of the present inventor discloses a kind of vibration type at first patent CN201520280643.6 and hangs folding sieve, this screen(ing) machine includes frame, some string sieve unit, Chuan Zhen mechanism, exciting agency, chute at the bottom of machine and string between backing groove, wherein hang over the cavity that each string sieve unit is hollow connection in frame, the sieve chamber that shakes is set by vertical merogenesis, its inclined plane is provided with screen cloth, often joint shakes and sieves chamber all turnovers in " it " shape, order about the biography of Ge Jiechuanzhen mechanism with exciting agency to shake frame up-down vibration, so that being positioned at same biography all sieve chambeies that shakes of sieve unit isometry positions that shakes on frame to be combined vibration, thus transfer vibrations on the compass screen surface in the sieve chamber that shakes.
Another of the present inventor discloses at first patent CN201520280642.1 and a kind of plug-type hangs folding sieve, and this screen(ing) machine includes chute at the bottom of frame, some string sieve unit, push-pull mechanism, drive system, machine and backing groove between string;Wherein hang over the cavity that each string sieve unit is hollow connection in frame, by vertical merogenesis, dynamic sieve chamber group is set, the two sided in its sieve chamber is provided with screen cloth, when the sieve chamber of dynamic sieve chamber group is by push-and-pull, variable-angle is transferred, each push-pull bar ordering about push-pull mechanism by drive system does reciprocating sliding action, wave affecting the sieve chamber of the whole sieve unit isometry positions being positioned at same push-pull bar to be combined, make the compass screen surface in each sieve chamber replace rotation down and upward.
Above-mentioned both is hung folding sieve and is different in that with concentrator dehydration: have feedstock concentrations wide ranges, fast dewatering, feature that cost is low, though the lower slurry of its sieve is unlimpid but can control to very rare degree, both hangs slurry under the sieve that folding sieve separates need not use the concentrator that cost is high, can use the low sedimentation tank of cost instead and carry out gravitational settling dehydration;And to both hang folding sieve carry out type selecting time, the height of its sieve unit be according to sieve starching concentration requirement come fixed, when reducing investment outlay, still can make both hang folding sieve concentration usefulness be not fully exerted.
Summary of the invention
The conception of the present invention is in that: adopt the present inventor's to sieve or/and folding sieve hung by the vibration type that CN201520280643.6 makes at the first patent CN201520280642.1 plug-type folding of hanging made, its model of action for sifting out to obtain dense ore pulp by thin liquid pulp, different with clarification concentration, it is not necessary to deliberately to require that the lower slurry of sieve is limpid;It is distinguished to concentrate with the clarification on ordinary meaning, is referred to as to sieve rare concentration by the concentration operation carried out to obtain dense ore pulp to sift out thin liquid pulp.Consider that both is hung folding sieve and sieve starching is only capable of playing the effect of concentration, to greater proportion of moisture is shifted out from sieve starching, can use and filter or filter pressing, and in the way of sifting out thin liquid pulp, realize less equipment investment, process more ore deposit amount, the mesh suitably strengthening filter medium just can accelerate the rate of filtration, now also need not deliberately require that filtrate is limpid;For this, will be referred to as to sieve rare filter to filtration or the filter pressing operation obtaining filter cake and carrying out sifting out thin liquid pulp.
As a rule, vacuum filter and filter press are with filter cloth for filter medium, for vacuum filter, after strengthening mesh, just have more air permeable, thus can reduce filter efficiency;For filter cloth, after strengthening mesh, yarn easily offsets, it is difficult to controlled uniformly by mesh;And for screen cloth, after strengthening mesh, can accomplish exceptionally straight for tinsel to avoid it to offset, prolonged use still can keep mesh uniform;Therefore the pressure filter being filter medium with screen cloth is selected to carry out sieving rare filter more particularly suitable.
No matter it is that the ore particle in thin liquid pulp needs to soak again, or the medicament in thin liquid pulp needs recycling, accomplish to return it into use and on leaching and the impact of absorption is very micro-, as long as thin liquid pulp is suitably rare, need not deliberately serosity be precipitated very limpid, therefore need not increase the operation carrying out mud-water separation with sedimentation tank.
The filter pressing function utilizing both extension foldings to sieve and to be filter medium with screen cloth separates the feature of thin liquid pulp rapidly, and ore pulp extraction of gold process flow process carries out substep, thus the model of action changing leaching, adsorbing and embathe.
For above-mentioned conception, below technical scheme is drafted respectively as single hop, two sections and three sections of ore pulp extraction of gold process.
Single hop technical scheme is: namely carry out the single hop ore pulp extraction of gold process of substep in the way of sifting out thin liquid pulp, includes grind grading successively, at first sieves rare concentration, conventional ore pulp carries gold, and each step is characterised by:
Described grind grading: fed by gold-bearing material and carry out in grind grading loop sizing mixing and ore grinding, the feed end at ore grinding adds protection alkali, classified and after being excluded by wood flour, discharges levigate ore pulp;
Described at first sieving rare concentration: undertaken sieving rare concentration by the levigate ore pulp of grind grading gained, to separate the lower slurry of at first sieve and at first to sieve starching, the mass concentration controlling the lower slurry of at first sieve is 3%~6%, and the mass concentration at first sieving starching is 35%~45%;At first the lower slurry of sieve returns to grind grading to constitute closed cycle;
Described conventional ore pulp carries gold: carbon-in-leach process conventional for the at first sieve starching of step gained before or resin in pulp process are carried gold, this step adds gold lixivant, blasts air, or blasts air and add cooxidant simultaneously, gold loaded carbon or gold loaded resin is isolated, remaining leaching slurry after absorption.
Two sections of technical schemes are: namely carry out two sections of ore pulp extraction of gold process of substep in the way of sifting out thin liquid pulp, include grind grading successively, at first sieve rare concentration, leading portion leaches, leading portion sieves rare concentration or sieve rare filter, thin liquid pulp absorption and separate, conventional ore pulp carries gold, wherein grind grading, at first to sieve rare concentration identical with single hop technical scheme, the feature of step is thereafter:
Described leading portion leaches: being stirred the at first sieve starching at first sieving rare concentration gained leaching, this step adds gold lixivant, blasts air, or blasts air and add cooxidant simultaneously;
Described leading portion sieves rare concentration or sieves rare filter: ore pulp leading portion leaching processed carries out sieving rare concentration or sieving rare filter, and to sift out the lower slurry of leading portion sieve, the mass concentration controlling the lower slurry of leading portion sieve is 3%~6%;For sieving rare concentration, stay on sieve for leading portion sieve starching, control leading portion sieve starching mass concentration be 55%~65%;For sieving rare filter, staying on sieve is leading portion filter cake, and the moisture content controlling leading portion filter cake is 15%~20%;
The absorption of described thin liquid pulp and separation: lower for the sieve of step gained before slurry is adsorbed the gold or silver that have leached by activated carbon or resin, and isolates gold loaded carbon or gold loaded resin, the remaining lean slurry of leading portion;The lean slurry of leading portion return to before grind grading in recycle to replace clear water, the water shortage part returning slurry adds clear water;
Described conventional ore pulp carries gold: the sieve starching of step gained before or filter cake are sized mixing to mass concentration be 35%~45%, gold is carried with conventional carbon-in-leach process or resin in pulp process, this step adds gold lixivant, blast air, or blast air and add cooxidant simultaneously, after absorption, isolate back segment go out charcoal or back segment resin, remaining leaching slurry.
Three sections of technical schemes: namely carry out three sections of ore pulp extraction of gold process of substep in the way of sifting out thin liquid pulp, consider when handled Gold Concentrate under Normal Pressure needs to increase leaching and washing times, in two-stage nitration ore pulp extraction of gold process, embed stage casing leaching and stage casing is sieved rare concentration or sieves rare filter, become three sections of ore pulp extraction of gold process, its technological process includes grind grading successively, at first rare concentration is sieved, leading portion leaches, leading portion sieves rare concentration or sieves rare filter, stage casing is leached, stage casing is sieved rare concentration or sieves rare filter, thin liquid pulp absorption and separation, conventional ore pulp carries gold, wherein grind grading, at first rare concentration is sieved, leading portion leaches, leading portion sieves rare concentration or to sieve rare filter identical with two sections of technical schemes, thereafter the feature of step is:
Described stage casing is leached: leading portion is sieved rare concentration sieve the leading portion sieve starching of rare filter gained or leading portion filter cake to size mixing to mass concentration be 35%~45%, and carry out leaching, this step adds gold lixivant, blasts air, or blasts air and add cooxidant simultaneously;
Described stage casing is sieved rare concentration or sieves rare filter: ore pulp stage casing leaching processed carries out sieving rare concentration or sieving rare filter, and to sift out the lower slurry of stage casing sieve, the mass concentration controlling the lower slurry of stage casing sieve is 3%~6%;For sieving rare concentration, stay on sieve for stage casing sieve starching, control stage casing sieve starching mass concentration be 55%~65%;For sieving rare filter, staying on sieve is stage casing filter cake, and the moisture content controlling stage casing filter cake is 15%~20%.
Described thin liquid pulp absorption and separating: stage casing sieved rare concentration or sieves the lower slurry of stage casing sieve of rare filter gained and leading portion and sieve rare concentration or sieve the lower slurry of leading portion sieve of rare filter gained and converge, carrying out thin liquid pulp absorption and separation, with the lean slurry in remaining front stage casing;The lean slurry in front stage casing return to before grind grading in recycle to replace clear water, the water shortage part returning slurry adds clear water;
Described conventional ore pulp carries gold: stage casing is sieved rare concentration or sieves stage casing sieve starching or the stage casing filter cake of rare filter gained, size mixing to mass concentration be 35%~45%, gold is carried with conventional carbon-in-leach process or resin in pulp process, this step adds gold lixivant, blast air, or blast air and add cooxidant simultaneously, after absorption, isolate back segment go out charcoal or back segment resin, remaining leaching slurry.
In ore pulp extraction of gold process flow process, if through conventional ore pulp carry leaching slurry that gold processed be true tailings slurry time, and in order to utilize the Residuals in liquid phase, and reduce the tailings liquid scale of construction needing to disinfect, also include back segment and sieve rare filter, the leaching slurry that conventional ore pulp carries gold gained carries out the back segment rare filter of sieve to separate the lean slurry of back segment and leaching slag filter cake, and the mass concentration controlling the lean slurry of back segment is 3%~6%, and the moisture content of leaching slag filter cake is 15%~20%;Wherein, in single hop ore pulp extraction of gold process, the lean slurry of back segment return to before grind grading in recycle to replace clear water;In two sections of ore pulp extraction of gold process, the lean slurry of back segment return to before grind grading and conventional ore pulp carry in the step of gold and recycle to replace clear water;In three sections of ore pulp extraction of gold process, the lean slurry of back segment return to before grind grading, stage casing is leached and conventional ore pulp carries in the step of gold and recycles to replace clear water;The water shortage part returning slurry adds clear water.
If the present invention is for processing Gold Ore that gold-bearing material is broken mistake, selecting single hop or two sections of ore pulp extraction of gold process, in grind grading step, the mass concentration controlling levigate ore pulp is 20%~35%, and its grade quality is for account for 85%~95% less than 74 μm.
If the present invention is used for processing gold-bearing material when being Gold Concentrate under Normal Pressure, selecting two sections or three sections of ore pulp extraction of gold process, in grind grading step, the mass concentration controlling levigate ore pulp is 15%~25%, and its grade quality accounts between 95% to less than 37 μm for accounting for 90% less than 45 μm.
In two sections or three sections of ore pulp extraction of gold process, it is contemplated that its stage casing and back segment have leaching and cleaning function concurrently, main Leaching reaction therefore should being made to occur to leach at leading portion, because having Residuals and returning medicament in step afterwards, Leaching reaction still can carry out;In order to find the best dosing in stage casing and back segment, leach in described stage casing and/or conventional ore pulp carries in gold, add gold lixivant.
Described at first sieve rare concentration, leading portion sieves rare concentration, stage casing sieves that the equipment choosing patent CN201520280642.1 of rare concentration is disclosed a kind of plug-type hangs folding sieve or folding sieve hung by the disclosed a kind of vibration type of patent CN201520280643.6.
The pressure filter that described leading portion sieves rare filter, rare filter is sieved in stage casing, the equipment choosing of the back segment rare filter of sieve is filter medium with screen cloth.
In ore pulp extraction of gold process, it is 10~30kg/m that described conventional ore pulp puies forward the throwing people amount of activated carbon used by carbon-in-leach process in gold3(by unit ore pulp volumenometer, lower same), wherein in two sections or three sections of technical schemes, in order to improve final gold loaded carbon containing gold (silver) grade, when commercial production starts, conventional ore pulp carries gold and thin liquid pulp absorption and separating step activated carbon all in unloaded, conventional ore pulp then carrying the back segment that gold separates backward go out charcoal and be transplanted on thin liquid pulp absorption and separate to replace unloaded charcoal, back segment goes out load gold (silver) saturation of charcoal and carries gold with conventional ore pulp and adsorb with thin liquid pulp and the working load that separates mutually balances and is advisable.
In ore pulp extraction of gold process, it is 3~9kg/m that described conventional ore pulp puies forward the throwing people amount of gold resin3, wherein in two sections or three sections of technical schemes, in order to improve final gold loaded resin containing gold and silver grade, when commercial production starts, conventional ore pulp carries the resin of gold and thin liquid pulp absorption and separating step all in zero load;Conventional ore pulp then carrying the back segment resin that gold separates backward be transplanted on thin liquid pulp absorption and separate to replace unloaded resin, load gold (silver) saturation of back segment resin carries gold with conventional ore pulp and adsorbs with thin liquid pulp and the working load that separates mutually balances and is advisable.
When selecting activated carbon to adsorb, in order to avoid the abrasion to rich gold loaded carbon of the mechanical agitation impeller, the equipment choosing of the absorption of described thin liquid pulp and separating step is to inflate the pachuca stirred, and inflates to pachuca with pressure fan.When selecting resin to adsorb, owing to resin specific activity charcoal is more resistant to mill, the equipment of the absorption of described thin liquid pulp and separating step is not specially required, such as can select leaching bothrium.
In the technological process of the present invention; used protection alkali, gold lixivant and cooxidant are known technology; in the process that the technology of the present invention is advanced towards commercial production; middle-size and small-size leaching test and economical comparision should be carried out to determine suitable regime of agent and extraction time by the stepped approach of the present invention, below regime of agent and extraction time are explained as follows:
The protection alkali of described grind grading step is at least one in quick lime, Calx, sodium carbonate, sodium hydroxide, potassium hydroxide, ammonia;Described leading portion leaches, stage casing is leached, to carry the gold lixivant of gold step be at least one in Cyanogran., potassium cyanide, Cyanogas (Am. Cyanamid). to conventional ore pulp;Described leading portion leaches, stage casing is leached, to carry the cooxidant of gold step be at least one in oxygen-enriched air, calper calcium peroxide, hydrogen peroxide, ferricyanate, hypochlorite to conventional ore pulp, and cooxidant is in order to shorten extraction time, reduce gold lixivant consumption, to optimize leaching effect.
Characteristic according to Gold Ore, when processing with single hop ore pulp extraction of gold process, gold step is carried for described conventional ore pulp, adding Cyanogran. makes its content in ore pulp be that 0.5~3.5kg/t(is by gold-bearing material, lower same), when the air blasted makes liquid phase oxygen content maintain 5mg/L, extraction time is 12~48h.
Characteristic according to Gold Ore, when processing with two sections of ore pulp extraction of gold process, step is leached for described leading portion, add Cyanogran. and make its content in ore pulp be 0.5~3.5kg/t, when the air blasted makes liquid phase oxygen content maintain 5mg/L, extraction time is 12~32h;Putting forward gold step for described conventional ore pulp, adding the content that Cyanogran. makes it in ore pulp is 0.25~1.0kg/t, and when the air blasted makes liquid phase oxygen content maintain 5mg/L, extraction time is 6~12h.
Characteristic according to Gold Concentrate under Normal Pressure, when processing with two sections or three sections of ore pulp extraction of gold process, step is leached for described leading portion, add Cyanogran. and make its content in ore pulp be 3~10kg/t, when the air blasted makes liquid phase oxygen content maintain 5mg/L, extraction time is 24~72h;Putting forward gold step for described conventional ore pulp, adding the content that Cyanogran. makes it in ore pulp is 1~3kg/t, and when the air blasted makes liquid phase oxygen content maintain 5mg/L, extraction time is 6~12h.
Characteristic according to Gold Concentrate under Normal Pressure, when processing with three sections of ore pulp extraction of gold process, leaches step for described stage casing, and adding the content that Cyanogran. makes it in ore pulp is 2~5kg/t, and when the air blasted makes liquid phase oxygen content maintain 5mg/L, extraction time is 12~24h.
Various lean slurries, after recycling after a while, if occurring in that foreign ion Accumulation Phenomenon, then draft impurity-removing method according to the kind of foreign ion, and impurity-removing method has known technology, and remove impurity lean solution returns and uses;If foreign ion Accumulation Phenomenon does not occur, can bear by gold loaded carbon or gold loaded resin and incidentally take away foreign ion, then remove impurity operation need not be set.
In addition, gold loaded carbon or gold loaded resin are pressed known technical finesse to obtain Jin Heyin, stripping liquid and regenerated carbon or regenerating resin, stripping liquid return to after remove impurity ore pulp carry gold flow process in use to replace clear water, regenerated carbon or regenerating resin return to ore pulp carry gold flow process in use.
Compared with existing carbon-in-pulp process CIP and CIL flow process and resin in pulp process, the present invention has following advantage:
1) with sieve rare concentration replace clarification concentration, and be aided with sieve rare leaching generation filter or filter pressing, sieve rare concentration with two kinds hang roll over sieves realize, sieve rare filter and realize in order to the pressure filter that screen cloth is filter medium;So, both lower for sieve slurry can be controlled to very rare degree, it is required for again that build is big, antiseep requires height, the concentrator that Civil Cost is high, the rare concentration of sieve wherein carried out with extension folding sieve has feedstock concentrations wide ranges, fast dewatering, cost is low, concentrate the feature that usefulness can give full play to;The rare filter of sieving carried out in order to the pressure filter that screen cloth is filter medium has that filtering velocity is fast, filter cake moisture content is low, can promote unit disposal ability, saves the feature of equipment manufacturing cost.
2) no matter it is that at first the lower ore particle starched of sieve needs to soak again, or slurry or the lower slurry of stage casing sieve medicament after adsorbing and separating need recycling under leading portion sieve, when ore pulp containing a small amount of ore particle returns, the ore particle that previous round sifts is finally to enter in sieve starching or filter cake in a circulating manner, owing to sieving rare concentration or to sieve rare filter less demanding to what separate by granule size, thus without causing fine-graded circulative accumulation, the circulation of a small amount of ore particle impact on leaching and adsorb is very micro-, and simply the circulative accumulation of foreign ion in lean slurry is needed monitoring, and every a period of time, foreign ion is purged;So, at first sieving lower slurry, it is not necessary to increase sedimentation tank and be used for carrying out mud-water separation;To slurry under leading portion sieve or the lower slurry of stage casing sieve, in the most of time not needing removal of contamination ion, sedimentation tank desliming operation can also be saved before and after absorption.
3) hop count of technological process is set flexibly according to the characteristic of gold-bearing material, when being used for processing low grade gold ore, single hop ore pulp extraction of gold process should be adopted, with simplification of flowsheet;When being used for processing relatively high-grade Gold Ore, two sections of ore pulp extraction of gold process should be adopted;When being used for processing Gold Concentrate under Normal Pressure, two sections or three sections of ore pulp extraction of gold process should be adopted, application is sieved rare concentration or sieves the solid-liquid separation method of rare filter and transfer in thin liquid pulp by liquid, sieve starching or filter cake are sized mixing again, so, soak operation again and just had cleaning function concurrently, be conducive to improving total leaching rate, total Washing ratio and total adsorption rate.
4) two sections or three sections of ore pulp extraction of gold process for adsorbing with activated carbon, by adjusting the regime of agent leached, leading portion leaching can be controlled and stage casing is leached and dissolved higher proportion of gold and silver, then with sieving rare concentration or sieving rare filter the part leached in advance is shifted in advance, the back segment separated owing to conventional ore pulp carrying gold step goes out charcoal and is transplanted on thin liquid pulp absorption and separating step, thus just can realize thin liquid pulp absorption and separating step is to contact with rich gold loaded carbon with the thin liquid pulp containing rich gold liquid, and for thin liquid pulp, adopt pachuca required pressure wind lower, when thus just having accomplished low dynamics consumption, rich gold loaded carbon motion is made with air-flow rather than with impeller, and conventional ore pulp to put forward gold step be contact with lean gold loaded carbon with the dense ore pulp containing poor gold liquid with impeller;So, the more dense abrasion to lean gold loaded carbon of ore pulp is more big, and the more rare abrasion to rich gold loaded carbon of ore pulp is more little;Contrast, more simply lean gold loaded carbon of wearing and tearing, thus decrease the gold silver loss with broken charcoal on the whole.
5) two sections or three sections of ore pulp extraction of gold process for adsorbing with resin, in process the absorption and separating step that thin liquid pulp carries out with resin, owing to the density of thin liquid pulp and the density of resin are close, resin is spreaded more evenly across in thin liquid pulp, and sifts out gold loaded resin from thin liquid pulp and sift out than from dense ore pulp and be easier to.
Accompanying drawing explanation
In various embodiments of the present invention, if adsorbing with activated carbon, corresponding ore pulp extraction of gold process is referred to as carbon-in-pulp process;If adsorbing with resin, corresponding ore pulp extraction of gold process is referred to as resin in pulp process.
Fig. 1 is known carbon-in-pulp process CIP and CIL flow chart;
Fig. 2 is that the process Gold Ore described in embodiment 1 is to sift out the single hop carbon-in-pulp process flow chart of thin liquid pulp substep;
Fig. 3 is that the process Gold Ore described in embodiment 2 is to sift out the single hop resin in pulp process flow chart of thin liquid pulp substep;
Fig. 4 is that the process Gold Ore described in embodiment 3 is to sift out two sections of carbon-in-pulp process flow charts of thin liquid pulp substep;
Fig. 5 is that the process Gold Concentrate under Normal Pressure described in embodiment 4 is to sift out two sections of resin in pulp process flow charts of thin liquid pulp substep;
Fig. 6 is that the process Gold Concentrate under Normal Pressure described in embodiment 5 is to sift out two sections of carbon-in-pulp process flow charts of thin liquid pulp substep;
Fig. 7 is that the process Gold Concentrate under Normal Pressure described in embodiment 6 is to sift out three sections of carbon-in-pulp process flow charts of thin liquid pulp substep.
Detailed description of the invention
It is described in further detail below in conjunction with drawings and Examples.
Embodiment one
Embodiment 1 is the single hop carbon-in-pulp process processing Gold Ore to sift out thin liquid pulp substep, gold-bearing material is Lateritic Gold Deposit, its Chemical bath deposition is Au:2.8g/t, Ag:46g/t, Cu:0.6%, Fe:38%, its flow process is as shown in Figure 2, include grind grading successively, at first sieve rare concentration, conventional ore pulp carries gold, and each step is characterised by:
Described grind grading: gold-bearing material is fed and carries out in grind grading loop sizing mixing and ore grinding, feed end at ore grinding adds quick lime 10kg/t, so that slurry pH is transferred to 11, it is classified and after wood flour is excluded, discharge levigate ore pulp, the mass concentration controlling levigate ore pulp is 22%, and its grade quality is for account for 95% less than 74 μm;
Described at first sieve rare concentration: the equipment choosing of this operation is plug-type hangs folding sieve, undertaken sieving rare concentration by the levigate ore pulp of grind grading gained, to separate the lower slurry of at first sieve and at first to sieve starching, the mass concentration controlling the lower slurry of at first sieve is 5%, and the mass concentration at first sieving starching is 40%;At first the lower slurry of sieve returns to grind grading to constitute closed cycle;
Described conventional ore pulp carries gold: conventional for the at first sieve starching at first sieving rare concentration gained carbon-in-leach process is carried gold, this step adds Cyanogran. makes its content in ore pulp be that 2.5kg/t(is by gold-bearing material, lower same), when the air blasted makes liquid phase oxygen content maintain 5mg/L, extraction time is 24h, also attaching part silver and copper leaching, selection cocoanut active charcoal in the process of leaching gold, the throwing people amount of activated carbon is 20kg/m3(by unit ore pulp volumenometer, lower same), isolates the gold loaded carbon containing gold, silver and bronze after absorption, remaining leaching slurry;
To gold loaded carbon by known technical finesse to obtain gold, silver, copper, stripping liquid and regenerated carbon, stripping liquid returns to after remove impurity in grind grading and uses to replace clear water, and regenerated carbon returns to conventional ore pulp and proposes use in gold.
Embodiment two
Embodiment 2 is the single hop resin in pulp process processing Gold Ore to sift out thin liquid pulp substep, gold-bearing material is Quartz Vein Type gold containing ore and altered rock-type gold containing ore is joined ore deposit and formed, its gold grade is Au:5.5g/t, its flow process is as shown in Figure 3, include grind grading successively, at first sieve rare concentration, conventional ore pulp carries gold, back segment sieves rare filter, and each step is characterised by:
Described grind grading: gold-bearing material is fed and carries out in grind grading loop sizing mixing and ore grinding, feed end at ore grinding adds quick lime 4kg/t, so that slurry pH is transferred to 11, it is classified and after wood flour is excluded, discharge levigate ore pulp, the mass concentration controlling levigate ore pulp is 30%, and its grade quality is for account for 90% less than 74 μm;
Described at first sieve rare concentration: folding sieve hung by the equipment choosing vibration type of this operation, undertaken sieving rare concentration by the levigate ore pulp of grind grading gained, to separate the lower slurry of at first sieve and at first to sieve starching, the mass concentration controlling the lower slurry of at first sieve is 4%, and the mass concentration at first sieving starching is 35%;At first the lower slurry of sieve returns to grind grading to constitute closed cycle;
Described conventional ore pulp carries gold: the at first sieve starching usual resins pulp process at first sieving rare concentration gained is carried gold, this step adds Cyanogran. makes its content in ore pulp be that 0.9kg/t(is by gold-bearing material, lower same), when the air blasted makes liquid phase oxygen content maintain 5mg/L, extraction time is 36h, selecting the D301G type resin that Chemical Plant of Nankai Univ. produces, the throwing people amount of resin is 5kg/m3, after absorption, isolate the gold loaded carbon containing gold, silver and bronze, remaining leaching slurry;
Described back segment sieves rare filter: the pressure filter that the equipment choosing of this operation is filter medium with screen cloth, undertaken sieving rare filter to separate the lean slurry of back segment and leaching slag filter cake by the leaching slurry that conventional ore pulp carries gold gained, the mass concentration controlling the lean slurry of back segment is 4%, and the moisture content of leaching slag filter cake is 18%;The lean slurry of back segment return to before grind grading in recycle to replace clear water;
Owing to the adsorption capacity of resin is big, selectivity is poor, foreign ion accumulates in gold loaded resin, sieves without accumulating on back segment in the lean slurry of back segment of rare filter gained;To gold loaded resin by known technical finesse to obtain gold, stripping liquid and regenerating resin, stripping liquid returns to after remove impurity in grind grading and uses to replace clear water, and regenerating resin returns to conventional ore pulp and proposes use in gold.
Embodiment three
Embodiment 3 is the two sections of carbon-in-pulp processes processing Gold Ore to sift out thin liquid pulp substep, gold-bearing material is Quartz Vein Type gold containing ore and altered rock-type gold containing ore is joined ore deposit and formed, its gold grade is Au:5.5g/t, its flow process is as shown in Figure 4, include grind grading successively, at first sieve rare concentration, leading portion leaches, leading portion sieves rare concentration, thin liquid pulp absorption and separate, conventional ore pulp carries gold, back segment sieves rare filter, each step is characterised by:
Described grind grading: gold-bearing material is fed and carries out in grind grading loop sizing mixing and ore grinding, feed end at ore grinding adds quick lime 4kg/t, so that slurry pH is transferred to 11, it is classified and after wood flour is excluded, discharge levigate ore pulp, the mass concentration controlling levigate ore pulp is 30%, and its grade quality is for account for 90% less than 74 μm;
Described at first sieve rare concentration: the equipment choosing of this operation is plug-type hangs folding sieve, undertaken sieving rare concentration by the levigate ore pulp of grind grading gained, to separate the lower slurry of at first sieve and at first to sieve starching, the mass concentration controlling the lower slurry of at first sieve is 4%, and the mass concentration at first sieving starching is 45%;At first the lower slurry of sieve returns to grind grading to constitute closed cycle;
Described leading portion leaches: be stirred the at first sieve starching at first sieving rare concentration gained leaching, and adds Cyanogran. and makes its content in ore pulp be 0.8kg/t, and when the air blasted makes liquid phase oxygen content maintain 5mg/L, extraction time is 24h;
Described leading portion sieves rare concentration: the equipment choosing of this operation is plug-type hangs folding sieve, ore pulp leading portion leaching processed carries out sieving rare concentration, to separate the lower slurry of leading portion sieve and leading portion sieve starching, the mass concentration controlling the lower slurry of leading portion sieve is 4%, and the mass concentration of leading portion sieve starching is 60%;
The absorption of described thin liquid pulp and separation: the equipment choosing of this operation is to inflate the pachuca stirred, and inflate to pachuca with pressure fan, the lower slurry of leading portion sieve that leading portion sieves rare concentration gained is adsorbed the gold leached by activated carbon, and isolates gold loaded carbon, the remaining lean slurry of leading portion;The lean slurry of leading portion return to before grind grading in recycle to replace clear water, the water shortage part returning slurry adds clear water;
Described conventional ore pulp carries gold: leading portion is sieved the leading portion sieve starching of rare concentration gained size mixing to mass concentration be 40%, gold is carried with conventional carbon-in-leach process, it is 0.4kg/t that this step adds the content that Cyanogran. makes it in ore pulp, when the air blasted makes liquid phase oxygen content maintain 5mg/L, extraction time is 8h, selecting cocoanut active charcoal, the throwing people amount of activated carbon is 18kg/m3, after absorption, isolate back segment go out charcoal, remaining leaching slurry.
Described back segment sieves rare filter: the pressure filter that the equipment choosing of this operation is filter medium with screen cloth, undertaken sieving rare filter to separate the lean slurry of back segment and leaching slag filter cake by the leaching slurry that conventional ore pulp carries gold gained, the mass concentration controlling the lean slurry of back segment is 4%, and the moisture content of leaching slag filter cake is 16%;The lean slurry of back segment return to before grind grading and conventional ore pulp carry in the step of gold and recycle to replace clear water, the water shortage part returning slurry adds clear water.
In order to improve the Gold grade of final gold loaded carbon, when commercial production starts, conventional ore pulp carries the activated carbon of gold and thin liquid pulp absorption and separating step all in unloaded, conventional ore pulp then carrying the back segment that gold separates backward go out charcoal and be transplanted on thin liquid pulp absorption and separating step to replace unloaded charcoal, back segment goes out the load gold of charcoal and silver saturation and proposes gold and thin liquid pulp absorption with conventional ore pulp and the working load that separates mutually balances and is advisable.
The lean slurry of leading portion and the lean slurry of back segment, after recycling after a while, if occurring in that foreign ion Accumulation Phenomenon in ore pulp system, then draft impurity-removing method according to the kind of foreign ion, and impurity-removing method has known technology, and remove impurity lean solution returns and uses.
To gold loaded carbon by known technical finesse to obtain gold, stripping liquid and regenerated carbon, stripping liquid return to after remove impurity ore pulp carry gold flow process in use to replace clear water, regenerated carbon return to ore pulp carry gold flow process in use.
Embodiment four
Embodiment 4 is the two sections of resin in pulp process processing Gold Concentrate under Normal Pressure to sift out thin liquid pulp substep, gold-bearing material is the Gold Concentrate under Normal Pressure after flotation-oxidizing roasting-acidleach remove impurity, its Chemical bath deposition is Au:56g/t, Ag:80g/t, its flow process is as shown in Figure 5, include grind grading successively, at first sieve rare concentration, leading portion leaches, leading portion sieves rare concentration, thin liquid pulp absorption and separate, conventional ore pulp carries gold, back segment sieves rare filter, each step is characterised by:
Described grind grading: gold-bearing material is fed and carries out in grind grading loop sizing mixing and ore grinding, feed end at ore grinding adds quick lime, its consumption is advisable so that slurry pH is transferred to 10.5~11.5, it is classified and after wood flour is excluded, discharge levigate ore pulp, the mass concentration controlling levigate ore pulp is 20%, and its grade quality is for account for 90% less than 45 μm;
Described at first sieve rare concentration: folding sieve hung by the equipment choosing vibration type of this operation, undertaken sieving rare concentration by the levigate ore pulp of grind grading gained, to separate the lower slurry of at first sieve and at first to sieve starching, the mass concentration controlling the lower slurry of at first sieve is 6%, and the mass concentration at first sieving starching is 40%;At first the lower slurry of sieve returns to grind grading to constitute closed cycle;
Described leading portion leaches: be stirred the at first sieve starching at first sieving rare concentration gained leaching, adding Cyanogran. makes its content in ore pulp be 6kg/t, when the air blasted makes liquid phase oxygen content maintain 5mg/L, extraction time is 48h, also attaches and leached by part silver in the process of leaching gold;
Described leading portion sieves rare concentration: the equipment choosing of this operation is plug-type hangs folding sieve, ore pulp leading portion leaching processed carries out sieving rare concentration, to separate the lower slurry of leading portion sieve and leading portion sieve starching, the mass concentration controlling the lower slurry of leading portion sieve is 6%, and the mass concentration of leading portion sieve starching is 60%;
The absorption of described thin liquid pulp and separation: the lower slurry of leading portion sieve that leading portion sieves rare concentration gained is adsorbed the Jin Heyin leached by resin, and isolates the golden silver resin of load, the remaining lean slurry of leading portion;The lean slurry of leading portion return to before grind grading in recycle to replace clear water, the water shortage part returning slurry adds clear water;
Described conventional ore pulp carries gold: leading portion is sieved the leading portion sieve starching of rare concentration gained size mixing to mass concentration be 40%, gold is carried with usual resins pulp process, it is 1kg/t that this step adds the content that Cyanogran. makes it in ore pulp, when the air blasted makes liquid phase oxygen content maintain 5mg/L, extraction time is 12h, also attaching in the process of leaching gold and leached by part silver, the WR-16 type resin that selection Shanghai Resin Factory produces, the throwing people amount of resin is 6kg/m3, after absorption, isolate back segment resin, remaining leaching slurry.
Described back segment sieves rare filter: the pressure filter that the equipment choosing of this operation is filter medium with screen cloth, undertaken sieving rare filter to separate the lean slurry of back segment and leaching slag filter cake by the leaching slurry that conventional ore pulp carries gold gained, the mass concentration controlling the lean slurry of back segment is 6%, and the moisture content of leaching slag filter cake is 20%;The lean slurry of back segment return to before grind grading and conventional ore pulp carry in the step of gold and recycle to replace clear water, the water shortage part returning slurry adds clear water.
In order to improve final gold loaded resin containing gold argentiferous grade, when commercial production starts, conventional ore pulp carries the resin of gold and thin liquid pulp absorption and separating step all in unloaded, conventional ore pulp then carrying the back segment resin that gold separates backward be transplanted on thin liquid pulp absorption and separate to replace unloaded resin, the load gold of back segment resin and silver saturation propose gold and thin liquid pulp absorption with conventional ore pulp and the working load that separates mutually balances and is advisable.
Owing to the adsorption capacity of resin is big, selectivity is poor, foreign ion accumulates in gold loaded resin, sieves without accumulating on back segment in the lean slurry of back segment of rare filter gained;To gold loaded resin by known technical finesse to obtain gold, silver, stripping liquid and regenerating resin, stripping liquid returns to after remove impurity in grind grading and uses to replace clear water, and regenerating resin returns to conventional ore pulp and proposes use in gold.
Embodiment five
Embodiment 5 is the two sections of carbon-in-pulp processes processing Gold Concentrate under Normal Pressure to sift out thin liquid pulp substep, gold-bearing material is the Gold Concentrate under Normal Pressure after flotation-microbe-preoxidation gold-oxidizing slag washing, its Chemical bath deposition is Au:75g/t, Ag:110g/t, S:12%, Fe:14%, its flow process is as shown in Figure 6, include grind grading successively, at first sieve rare concentration, leading portion leaches, leading portion sieves rare filter, thin liquid pulp absorption and separate, conventional ore pulp carries gold, back segment sieves rare filter, each step is characterised by:
Described grind grading: gold-bearing material is fed and carries out in grind grading loop sizing mixing and ore grinding, feed end at ore grinding adds quick lime, its consumption is advisable so that slurry pH is transferred to 10.5~11.5, it is classified and after wood flour is excluded, discharge levigate ore pulp, the mass concentration controlling levigate ore pulp is 20%, and its grade quality is for account for 95% less than 45 μm;
Described at first sieve rare concentration: the equipment choosing of this operation is plug-type hangs folding sieve, undertaken sieving rare concentration by the levigate ore pulp of grind grading gained, to separate the lower slurry of at first sieve and at first to sieve starching, the mass concentration controlling the lower slurry of at first sieve is 6%, and the mass concentration at first sieving starching is 40%;At first the lower slurry of sieve returns to grind grading to constitute closed cycle;
Described leading portion leaches: be stirred the at first sieve starching at first sieving rare concentration gained leaching, adding Cyanogran. makes its content in ore pulp be 8kg/t, when the air blasted makes liquid phase oxygen content maintain 5mg/L, extraction time is 60h, also attaches and leached by part silver in the process of leaching gold;
Described leading portion sieves rare filter: the pressure filter that the equipment choosing of this operation is filter medium with screen cloth, ore pulp leading portion leaching processed carries out sieving rare filter, to separate the lower slurry of leading portion sieve and leading portion filter cake, the mass concentration controlling the lower slurry of leading portion sieve is 6%, and the moisture content of leading portion filter cake is 20%;
The absorption of described thin liquid pulp and separation: the equipment choosing of this operation is to inflate the pachuca stirred, and inflate to pachuca with pressure fan, the lower slurry of leading portion sieve that leading portion sieves rare filter gained is adsorbed the Jin Heyin leached by activated carbon, and isolates load gold load silver charcoal, the remaining lean slurry of leading portion;The lean slurry of leading portion return to before grind grading in recycle to replace clear water, the water shortage part returning slurry adds clear water;
Described conventional ore pulp carries gold: leading portion is sieved the leading portion filter cake of rare filter gained size mixing to mass concentration be 40%, gold is carried with conventional carbon-in-leach process, it is 1.5kg/t that this step adds the content that Cyanogran. makes it in ore pulp, when the air blasted makes liquid phase oxygen content maintain 5mg/L, extraction time is 18h, also attaching in the process of leaching gold and leached by part silver, selection cocoanut active charcoal, the throwing people amount of activated carbon is 20kg/m3, after absorption, isolate back segment go out charcoal, remaining leaching slurry;
Described back segment sieves rare filter: the pressure filter that the equipment choosing of this operation is filter medium with screen cloth, undertaken sieving rare filter to separate the lean slurry of back segment and leaching slag filter cake by the leaching slurry that conventional ore pulp carries gold gained, the mass concentration controlling the lean slurry of back segment is 6%, and the moisture content of leaching slag filter cake is 20%;The lean slurry of back segment return to before grind grading and conventional ore pulp carry in gold step and recycle to replace clear water, the water shortage part returning slurry adds clear water.
In order to improve final gold loaded carbon containing gold argentiferous grade, when commercial production starts, conventional ore pulp carries the activated carbon of gold and thin liquid pulp absorption and separating step all in zero load;Conventional ore pulp then carrying the back segment that gold separates backward go out charcoal and be transplanted on thin liquid pulp absorption and separate to replace unloaded charcoal, back segment goes out the load gold load silver saturation of charcoal and proposes gold and thin liquid pulp absorption with conventional ore pulp and the working load that separates mutually balances and is advisable.
The lean slurry of leading portion and the lean slurry of back segment, after recycling after a while, if occurring in that foreign ion Accumulation Phenomenon in ore pulp system, then draft impurity-removing method according to the kind of foreign ion, and impurity-removing method has known technology, and remove impurity lean solution returns and uses.
To gold loaded carbon by known technical finesse to obtain gold, silver, stripping liquid and regenerated carbon, stripping liquid return to after remove impurity ore pulp carry gold flow process in use to replace clear water, regenerated carbon return to ore pulp carry gold flow process in use.
Embodiment six
Embodiment 6 is the three sections of carbon-in-pulp processes processing Gold Concentrate under Normal Pressure to sift out thin liquid pulp substep, gold-bearing material is the Gold Concentrate under Normal Pressure after flotation-reagent removal, its Chemical bath deposition is Au:65g/t, Cu:0.25%, S:30%, Fe:35%, its flow process is as shown in Figure 7, include grind grading successively, at first sieve rare concentration, leading portion leaches, leading portion sieves rare concentration, stage casing is leached, rare concentration is sieved in stage casing, thin liquid pulp absorption and separate, conventional ore pulp carries gold, back segment sieves rare filter, each step is characterised by:
Described grind grading: gold-bearing material is fed and carries out in grind grading loop sizing mixing and ore grinding, feed end at ore grinding adds sodium hydroxide, its consumption is advisable so that slurry pH is transferred to 10.5~11.5, it is classified and after wood flour is excluded, discharge levigate ore pulp, the mass concentration controlling levigate ore pulp is 18%, and its grade quality is for account for 95% less than 37 μm;
Described at first sieve rare concentration: the equipment choosing of this operation is plug-type hangs folding sieve, undertaken sieving rare concentration by the levigate ore pulp of grind grading gained, to separate the lower slurry of at first sieve and at first to sieve starching, the mass concentration controlling the lower slurry of at first sieve is 6%, and the mass concentration at first sieving starching is 35%;At first the lower slurry of sieve returns to grind grading to constitute closed cycle;
Described leading portion leaches: be stirred the at first sieve starching at first sieving rare concentration gained leaching, and adds Cyanogran. and makes its content in ore pulp be 9kg/t, blasts air and add hydrogen peroxide, makes liquid phase oxygen content maintain 25mg/L, and extraction time is 48h;
Described leading portion sieves rare concentration: the equipment choosing of this operation is plug-type hangs folding sieve, ore pulp leading portion leaching processed carries out sieving rare concentration, to separate the lower slurry of leading portion sieve and leading portion sieve starching, the mass concentration controlling the lower slurry of leading portion sieve is 6%, and the mass concentration of leading portion sieve starching is 60%;
Described stage casing leach: leading portion is sieved rare concentration gained leading portion sieve starching size mixing to mass concentration be 42%, and carrying out leaching, it is 3kg/t that this step adds the content that Cyanogran. makes it in ore pulp, blasts air and adds hydrogen peroxide, making liquid phase oxygen content maintain 20mg/L, extraction time is 16h;
Rare concentration is sieved in described stage casing: the equipment choosing of this operation is plug-type hangs folding sieve, ore pulp stage casing leaching processed carries out sieving rare concentration, to separate the lower slurry of stage casing sieve and stage casing sieve starching, the mass concentration controlling the lower slurry of stage casing sieve is 6%, and the mass concentration of stage casing sieve starching is 60%;
The absorption of described thin liquid pulp and separation: the equipment choosing of this operation is to inflate the pachuca stirred, and inflate to pachuca with pressure fan, the lower slurry of leading portion sieve of the lower slurry of stage casing sieve and the leading portion rare concentration gained of sieve that stage casing is sieved rare concentration gained converges, the gold leached is adsorbed by activated carbon, and isolate gold loaded carbon, the lean slurry in remaining front stage casing;The lean slurry in front stage casing return to before grind grading in recycle to replace clear water, the water shortage part returning slurry adds clear water;
Described conventional ore pulp carries gold: stage casing is sieved the stage casing sieve starching of rare concentration gained size mixing to mass concentration be 42%, gold is carried with conventional carbon-in-leach process, it is 1.5kg/t that this step adds the content that Cyanogran. makes it in ore pulp, blast air and add hydrogen peroxide, liquid phase oxygen content is made to maintain 12mg/L, extraction time is 8h, selects cocoanut active charcoal, and the throwing people amount of activated carbon is 20kg/m3, after absorption, isolate back segment go out charcoal, remaining leaching slurry;
Described back segment sieves rare filter: the pressure filter that the equipment choosing of this operation is filter medium with screen cloth, undertaken sieving rare filter to separate the lean slurry of back segment and leaching slag filter cake by the leaching slurry that conventional ore pulp carries gold gained, the mass concentration controlling the lean slurry of back segment is 6%, and the moisture content of leaching slag filter cake is 20%;The lean slurry of back segment return to before grind grading, stage casing is leached and conventional ore pulp carries in the step of gold and recycles to replace clear water, the water shortage part returning slurry adds clear water.
In order to improve the Gold grade of final gold loaded carbon, when commercial production starts, conventional ore pulp carries the activated carbon of gold and thin liquid pulp absorption and separating step all in unloaded;Conventional ore pulp then carrying the back segment that gold separates backward go out charcoal and be transplanted on thin liquid pulp absorption and separate to replace unloaded charcoal, back segment goes out the load gold saturation of charcoal and proposes gold and thin liquid pulp absorption with conventional ore pulp and the working load that separates mutually balances and is advisable.
The lean slurry in front stage casing and the lean slurry of back segment, after recycling after a while, if occurring in that foreign ion Accumulation Phenomenon in ore pulp system, then draft impurity-removing method according to the kind of foreign ion, and impurity-removing method has known technology, and remove impurity lean solution returns and uses.
To gold loaded carbon by known technical finesse to obtain gold, copper, stripping liquid and regenerated carbon, stripping liquid return to after remove impurity ore pulp carry gold flow process in use to replace clear water, regenerated carbon return to ore pulp carry gold flow process in use.
Above example is only in order to the present invention is described in detail, and unrestricted technical scheme, although with reference to above-described embodiment, those skilled in the art is it is understood that still can modify to the present invention or equivalent replacement, without deviating from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of scope of the presently claimed invention.

Claims (19)

1. in the way of sifting out thin liquid pulp, carry out the ore pulp extraction of gold process of substep, it is characterised in that include grind grading successively, at first sieve rare concentration, conventional ore pulp carries gold, and each step is characterised by:
Described grind grading: fed by gold-bearing material and carry out in grind grading loop sizing mixing and ore grinding, the feed end at ore grinding adds protection alkali, classified and after being excluded by wood flour, discharges levigate ore pulp;
Described at first sieving rare concentration: undertaken sieving rare concentration by the levigate ore pulp of grind grading gained, to separate the lower slurry of at first sieve and at first to sieve starching, the mass concentration controlling the lower slurry of at first sieve is 3%~6%, and the mass concentration at first sieving starching is 35%~45%;At first the lower slurry of sieve returns to grind grading to constitute closed cycle;
Described conventional ore pulp carries gold: carbon-in-leach process conventional for the at first sieve starching of step gained before or resin in pulp process are carried gold, isolates gold loaded carbon or gold loaded resin after absorption, remaining leaching slurry.
2. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to right 1, it is characterized in that: after at first sieving rare concentration, before conventional ore pulp carries gold, be sequentially carried out leading portion leaching, leading portion sieves rare concentration or sieves rare filter, thin liquid pulp absorption and separates, wherein:
Described leading portion leaches: be stirred the at first sieve starching at first sieving rare concentration gained leaching;
Described leading portion sieves rare concentration or sieves rare filter: ore pulp leading portion leaching processed carries out sieving rare concentration or sieving rare filter, and to sift out the lower slurry of leading portion sieve, the mass concentration controlling the lower slurry of leading portion sieve is 3%~6%;For sieving rare concentration, stay on sieve for leading portion sieve starching, control leading portion sieve starching mass concentration be 55%~65%;For sieving rare filter, staying on sieve is leading portion filter cake, and the moisture content controlling leading portion filter cake is 15%~20%;
The absorption of described thin liquid pulp and separation: lower for the sieve of step gained before slurry is adsorbed the gold or silver that have leached by activated carbon or resin, and isolates gold loaded carbon or gold loaded resin, the remaining lean slurry of leading portion;The lean slurry of leading portion return to before grind grading in recycle to replace clear water, the water shortage part returning slurry adds clear water;
Described conventional ore pulp carries gold: the sieve starching of step gained before or filter cake being sized mixing to mass concentration is 35%~45%, carries gold with conventional carbon-in-leach process or resin in pulp process, isolates back segment and go out charcoal or back segment resin after absorption, remaining leaching slurry.
3. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to claim 2, it is characterized in that: carry out stage casing leaching after leading portion sieves rare concentration or sieves rare filter, stage casing is sieved rare concentration or sieves rare filter, then carry out thin liquid pulp absorption and separation again, conventional ore pulp carries gold, wherein:
Described stage casing is leached: leading portion is sieved rare concentration sieve the leading portion sieve starching of rare filter gained or leading portion filter cake to size mixing to mass concentration be 35%~45%, and carry out leaching;
Described stage casing is sieved rare concentration or sieves rare filter: ore pulp stage casing leaching processed carries out sieving rare concentration or sieving rare filter, and to sift out the lower slurry of stage casing sieve, the mass concentration controlling the lower slurry of stage casing sieve is 3%~6%;For sieving rare concentration, stay on sieve for stage casing sieve starching, control stage casing sieve starching mass concentration be 55%~65%;For sieving rare filter, staying on sieve is stage casing filter cake, and the moisture content controlling stage casing filter cake is 15%~20%;
Described thin liquid pulp absorption and separating: stage casing sieved rare concentration or sieves the lower slurry of stage casing sieve of rare filter gained and leading portion and sieve rare concentration or sieve the lower slurry of leading portion sieve of rare filter gained and converge, carrying out thin liquid pulp absorption and separation, with the lean slurry in remaining front stage casing;The lean slurry in front stage casing return to before grind grading in recycle to replace clear water, the water shortage part returning slurry adds clear water;
Described conventional ore pulp carries gold: stage casing is sieved rare concentration or sieves stage casing sieve starching or the stage casing filter cake of rare filter gained, size mixing to mass concentration be 35%~45%, carry gold with conventional carbon-in-leach process or resin in pulp process, after absorption, isolate back segment go out charcoal or back segment resin, remaining leaching slurry.
4. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to claim 1, it is characterized in that: also include back segment and sieve rare filter, the leaching slurry that conventional ore pulp carries gold gained carries out the back segment rare filter of sieve to separate the lean slurry of back segment and leaching slag filter cake, the mass concentration controlling the lean slurry of back segment is 3%~6%, the moisture content of leaching slag filter cake is 15%~20%, the lean slurry of back segment return to before grind grading in recycle to replace clear water, the water shortage part returning slurry adds clear water.
5. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to claim 2, it is characterized in that: also include back segment and sieve rare filter, the leaching slurry that conventional ore pulp carries gold gained carries out the back segment rare filter of sieve to separate the lean slurry of back segment and leaching slag filter cake, the mass concentration controlling the lean slurry of back segment is 3%~6%, the moisture content of leaching slag filter cake is 15%~20%, the lean slurry of back segment return to before grind grading and conventional ore pulp carry in the step of gold and recycle to replace clear water, the water shortage part returning slurry adds clear water.
6. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to claim 3, it is characterized in that: also include back segment and sieve rare filter, the leaching slurry that conventional ore pulp carries gold gained carries out the back segment rare filter of sieve to separate the lean slurry of back segment and leaching slag filter cake, the mass concentration controlling the lean slurry of back segment is 3%~6%, the moisture content of leaching slag filter cake is 15%~20%, the lean slurry of back segment return to before grind grading, stage casing is leached and conventional ore pulp carries in the step of gold and recycles to replace clear water, the water shortage part returning slurry adds clear water.
7. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to claim 1 ~ 2 any one, it is characterized in that: the Gold Ore that gold-bearing material is broken mistake of described grind grading step, the mass concentration controlling levigate ore pulp is 20%~35%, and its grade quality is for account for 85%~95% less than 74 μm.
8. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to claim 2 ~ 3 any one, it is characterized in that: the gold-bearing material of described grind grading step is Gold Concentrate under Normal Pressure, the mass concentration controlling levigate ore pulp is 15%~25%, and its grade quality accounts between 95% to less than 37 μm for accounting for 90% less than 45 μm.
9. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to claim 1 ~ 3 any one, it is characterised in that: the described disclosed a kind of plug-type extension folding sieve of equipment choosing patent CN201520280642.1 at first sieving rare concentration or the disclosed a kind of vibration type extension folding sieve of patent CN201520280643.6.
10. the ore pulp extraction of gold process of next substep in the way of sifting out thin liquid pulp according to claim 2 ~ 3 any one, it is characterised in that: described leading portion sieves the disclosed a kind of plug-type extension folding sieve of equipment choosing patent CN201520280642.1 or the disclosed a kind of vibration type extension folding sieve of patent CN201520280643.6 of rare concentration.
11. the ore pulp extraction of gold process of next substep in the way of sifting out thin liquid pulp according to claim 3, it is characterised in that: the disclosed a kind of plug-type extension folding sieve of equipment choosing patent CN201520280642.1 or the disclosed a kind of vibration type extension folding sieve of patent CN201520280643.6 of rare concentration is sieved in described stage casing.
12. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to claim 2 ~ 3 any one, it is characterised in that: described leading portion sieves the pressure filter that the equipment choosing of rare filter is filter medium with screen cloth.
13. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to claim 3, it is characterised in that: the pressure filter that the equipment choosing of rare filter is filter medium with screen cloth is sieved in described stage casing.
14. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to claim 4 ~ 6 any one, it is characterised in that: described back segment sieves the pressure filter that the equipment choosing of rare filter is filter medium with screen cloth.
15. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to claim 1, it is characterised in that: it is 10~30kg/m that the activated carbon that described conventional ore pulp carries gold throws people's amount3, by unit ore pulp volumenometer, lower same.
16. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to claim 2 ~ 3 any one, it is characterised in that: it is 10~30kg/m that described conventional ore pulp puies forward the throwing people amount of activated carbon used by carbon-in-leach process in gold3When commercial production starts, conventional ore pulp carries the activated carbon of gold and thin liquid pulp absorption and separating step all in unloaded, conventional ore pulp then carrying the back segment that gold separates backward go out charcoal and be transplanted on thin liquid pulp absorption and separate to replace unloaded charcoal, back segment goes out the load gold of charcoal or load gold silver saturation and proposes gold and thin liquid pulp absorption with conventional ore pulp and the working load that separates mutually balances and is advisable.
17. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to claim 1, it is characterised in that: people's amount thrown by the resin that described conventional ore pulp carries gold is 3~9kg/m3
18. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to claim 2 ~ 3 any one, it is characterised in that: it is 3~9kg/m that described conventional ore pulp puies forward the throwing people amount of gold resin3, when commercial production starts, conventional ore pulp carries the resin of gold and thin liquid pulp absorption and separating step all in unloaded;Conventional ore pulp then carrying the back segment resin that gold separates backward be transplanted on thin liquid pulp absorption and separate to replace unloaded resin, the load gold of back segment resin or load gold silver saturation propose gold and thin liquid pulp absorption with conventional ore pulp and the working load that separates mutually balances and is advisable.
19. the ore pulp extraction of gold process carrying out substep in the way of sifting out thin liquid pulp according to claim 2,3,16 any one, it is characterized in that: when selecting activated carbon to adsorb, the equipment choosing of the absorption of described thin liquid pulp and separation is to inflate the pachuca stirred, and inflates to pachuca with pressure fan.
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WO2009108993A1 (en) * 2008-03-03 2009-09-11 Fenix Hydromet Australasia Pty Ltd Process for metal seperation using resin-in-pulp or resin-in-solution processes
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CN101363081A (en) * 2008-10-09 2009-02-11 吉林大学 Nontoxic process for extraction gold from gold-bearing tailing
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