CN107952577B - Difficulty selects cyanidation tailings preprocess method - Google Patents
Difficulty selects cyanidation tailings preprocess method Download PDFInfo
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- CN107952577B CN107952577B CN201711242520.3A CN201711242520A CN107952577B CN 107952577 B CN107952577 B CN 107952577B CN 201711242520 A CN201711242520 A CN 201711242520A CN 107952577 B CN107952577 B CN 107952577B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B1/00—Conditioning for facilitating separation by altering physical properties of the matter to be treated
- B03B1/04—Conditioning for facilitating separation by altering physical properties of the matter to be treated by additives
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Abstract
The invention discloses a kind of difficulties to select cyanidation tailings preprocess method, comprising the following steps: (1) washup pulping: difficulty is selected cyanidation tailings washup, pulping；(2) ore pulp activates: adding sulfuric acid into ore pulp obtained by step (1), while copper sulphate is added；(3) ore pulp filters pressing: filter cake is made in ore pulp filters pressing obtained by step (2), filtrate recycles after processing；(4) by filter cake again pulping, copper sulphate, ore grinding to predetermined fineness, into next step flotation operation ore pulp fine grinding: are added.The present invention adds copper sulphate in preprocessing process, newborn cyanide ion is complexed, substance containing cyanogen and floating agent remaining in cyanidation tailings can be efficiently removed after washup, activation, filters pressing and fine grinding processing, is conducive to the flotation recovery of subsequent valuable metal；Cyanide content is lower than National Pollutant Discharge grade III Standard in flotation tailing of the present invention and treated filtrate, and flotation tailing can further be made construction material, can be used for washup graded operation, remarkable in economical benefits after filtrate processing.
Description
Technical field
The invention belongs to technical field of mineral processing, and in particular to a kind of difficulty selects cyanidation tailings preprocess method.
Background technique
Cyanidation tailings are the waste residues of Cyanide Process generation during gold smelting, are stored up generally as solid waste
In Tailings Dam, most widely used stacked arrangement is dry heap method, and the Tailings Dam for storing up cyanidation tailings occupies a large amount of soils, hypertoxic
It is hidden to exist simultaneously the considerable safeties such as Tailings Dam dam break once revealing also would seriously pollute the environment for cyanide ion and heavy metal ion
Suffer from, the gold remained in tailings is also the wasting of resources, and gold industry cyanidation tailings every annual emissions in China's are more than 30,000,000 tons, is made
At economic loss up to tens yuan.
Extraction of gold by cyanidation produces a large amount of cyanidation tailings in the extensive use of gold factory, China, and cyanidation tailings usually contain
A variety of valuable elements such as gold, silver, copper, lead, zinc can bring good economic benefit and subtract if being able to achieve synthetical recovery for country
Few pollution of the tailing to environment.Respectively select factory's cyanidation tailings distinct, the floatation process factor for influencing cyanidation tailings is complicated.Cyaniding
The distinguishing feature of tailings is fine size, clay content is big and contains a certain number of cyanides and remaining floating agent, therefore, recycling
Gold element therein is more difficult.
Cyanidation tailings pretreating process is the key technology that can cyanidation tailings effectively select again, pre-processes skill in cyanidation tailings
In terms of art, dense sulfuric acid treatment cyanidation tailings are currently mainly used, to remove remaining cyanide, and the pretreatment to cyanidation tailings
Process is fairly simple, it is difficult to which sufficiently removing residual floating agent and cyanide are unfavorable for the flotation recovery of subsequent valuable metal.CN
101856635A discloses a kind of method using gold, silver, zinc in mineral dressing backwater to float recycling gold mine cyaniding tailings, this method mine
Slurry pretreatment stage is the addition ore dressing return water in cyanidation tailings, and the concentrated sulfuric acid is then added and stirs 5 minutes, to the concentrated sulfuric acid and ore pulp
It is added reagent removal by active carbon 55 minutes, is then pumped to flotation workshop section after reacting the cigarette that takes over, the comprehensive benefit of tailing may be implemented in this method
With, but the removing of the residual medicament of cyanide and flotation is not thorough, subsequent flotation recovery can be inhibited, reduce the recycling of metal
Rate.
Summary of the invention
The purpose of the present invention is to provide a kind of processes, and difficulty simple, that production cost is low, gold recovery is high selects cyanidation tailings
Preprocess method.
This difficulty provided by the invention selects cyanidation tailings preprocess method, comprising the following steps:
(1) washup pulping: difficulty selects cyanidation tailings washup, pulping, obtains ore pulp；
(2) ore pulp activates: adding the concentrated sulfuric acid into step (1) resulting ore pulp, while copper sulphate is added, obtain after stirring
Activate ore pulp；
(3) ore pulp filters pressing: filter cake is made in activation ore pulp filters pressing obtained by step (2), filtrate recycles after processing；
(4) ore pulp fine grinding: by filter cake again pulping, copper sulphate is added, ore grinding to predetermined fineness is made into next step flotation
Industry.
In the step (1), cyanidation tailings are selected to remove impurity through log washer difficulty, the mass concentration of gained ore pulp after pulping
It is 35~40%.
In the step (2), the addition concentrated sulfuric acid adjusts the pH to 4~5 of ore pulp, while 90~100g/t of copper sulphate is added,
Then it is stirred in activation stirred tank, mixing time is 2~2.5h, activates ore pulp, sulfuric acid can remove mineral surfaces
Cyanide, newborn Cyanide ion is quickly complexed in copper sulphate.
In the step (3), the specific method is as follows for ore pulp filters pressing: by the ore pulp after activation by filter press filters pressing, making
Medicament is remained together with heavy metal ion and filtrate with minerals separation, and moisture in filter cake is made to be 17~20%；The filter
Liquid is added appropriate lime, and the metal ions such as copper ion are become sediment while neutralisation of sulphuric acid, and the pH to 7 of Filtrate~
8, oxidation processes of the Filtrate using natural sedimentation and air, cyano complex and all natural sedimentations of heavy metal reactant,
Remaining organic medicament natural decomposition, in washup graded operation, reducing sewage quantity simultaneously reduces production cost for treated means of waste water reuse.
In the step (4), filter cake feeds pulping in slurry making machine by belt conveyor, ore pulp mass concentration 55 after pulping
~60%.
In the step (4), 90~100g/t of copper sulphate is added in the ball mill, utilizes the network of copper ion and Residuals
Cooperation is used, and is removed cyanogen again while increasing gold-carrying minerals degree of dissociation, is improved subsequent floatation indicators.
In the step (4), ball mill and hydrocyclone are formed into closed circuit grinding, the ore pulp of hydrocyclone overflow is thin
Degree reaches -0.038mm grain size content and accounts for 70~75%.
Flotation operation in the step (4) are as follows: the ore pulp after ore grinding is sized mixing, roughing operation is then carried out, obtains
Rougher concentration and rougher tailings scan for 3 times to rougher tailings, scan 1 and scan 2 gained rough concentrates and the conjunction of roughing rough concentrate
And then carry out 2 times it is selected obtain Gold Concentrate under Normal Pressure, other chats sequences return to a upper flotation flowsheet, and the tailing for scanning 3 can be made into building
Material.
Heretofore described " g/t " refers to additive amount of the medicament relative to raw ore, if the dosage of copper sulphate is 100g/t,
Refer to that one ton of raw ore of processing needs to be added copper sulphate 100g.
Compared with prior art, advantageous effects of the invention are as follows:
(1) present invention adds copper sulphate in preprocessing process, newborn cyanide ion is complexed, by washup, activation,
Substance containing cyanogen and floating agent remaining in cyanidation tailings can be efficiently removed after filters pressing and fine grinding processing, is conducive to subsequent have
The flotation recovery of valence metal.
(2) cyanide content is lower than National Pollutant Discharge three-level mark in flotation tailing of the present invention and treated filtrate
Standard, flotation tailing can further be made construction material, can be used for washup graded operation after filtrate processing, reduce sewage quantity and reduce
Production cost, environmental benefit is prominent, remarkable in economical benefits.
Detailed description of the invention
Fig. 1 is the process flow chart of the embodiment of the present invention 1.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, rather than whole embodiments, based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
The present invention provides a kind of difficulty and selects cyanidation tailings preprocess method, comprising the following steps:
(1) washup pulping: cyanidation tailings can be mixed into the impurity such as more sandstone, plastic cloth, sawdust during stockpiling,
This partial impurities, which must thoroughly remove just, can enter subsequent flotation operation, handle tailings containing cyanogen using specially designed log washer,
Efficiently separating for ore pulp and impurity, gained mine will may be implemented in log washer during the cyanidation tailings pulping of paste or solid-like
The mass concentration of slurry is 35~40%, and the ore pulp of the concentration is more conducive to subsequent pipeline conveying；
(2) ore pulp activates: containing more Residuals in cyanidation tailings, such as lime, cyanide, xanthate collectors
Deng this kind of medicament can cause greatly to interfere to subsequent flotation operation, influence the floatability of valuable mineral.In order to remove as far as possible
The Residuals such as lime, cyanide, xanthate are removed, the floatability of valuable mineral is restored, the ore pulp after washup has to pass through at activation
Reason.Specific activation method are as follows: the addition concentrated sulfuric acid adjusts pH values of pulp to 4~5 in activation stirred tank, while be added dosage be 90~
The copper sulphate of 100g/t, 2~2.5h of mechanical stirring.It activates stirred tank and passes through special transformation, ore pulp dispersibility is more preferable, in strong mixing
More air can be sucked in the process, increase the oxygen concentration in ore pulp, accelerate the oxidation rate of remaining xanthate class medicament.It is remaining
Lime can and sulfuric acid reaction produce sl. sol. calcium sulfate, the medicaments such as remaining cyanide can with effect of sulfuric acid and make mineral surfaces
This kind of medicament dissolution enter in liquid, the part thereof gangue in ore can also be generated by sulfuric acid dissolution heavy metal from
Son, the copper ion of addition and the free metal ion dissolved out can generate precipitating with Cyanide ion complexation, thus significantly
Reduce the concentration of Cyanide；
(3) ore pulp filters pressing: still remaining the medicaments such as part xanthate in the ore pulp after activation, these medicaments and free heavy metal
Ion can all generate greatly interference to subsequent flotation operation, living in order to make these harmful substances as far as possible with minerals separation
Ore pulp after change by filter press filters pressing, make most residual medicament together with heavy metal ion and filtrate with minerals separation,
17~20%, filtrate is added appropriate lime for moisture in filter cake, and neutralisation of sulphuric acid while becomes the metal ions such as copper ion
Sediment, the pH to 7~8 of Filtrate, Filtrate using precipitating and air oxidation, cyano complex with again
Metal reactant all natural sedimentations, remaining organic medicament natural decomposition, then means of waste water reuse reduces sewage in washup graded operation
It measures and reduces production cost；
(4) ore pulp fine grinding: gained filter cake is fed into pulping in specially designed slurry making machine by belt conveyor, after pulping
Ore pulp mass concentration can achieve 55~60%.The type slurry making machine aims at filter cake pulping job design, small in size, pulping efficiency
Height, pulping concentration is adjustable, low in energy consumption.After cyaniding is handled, most of exposed gold is dissolved by cyanide cyanidation tailings, is remained
Remaining gold mainly wraps up gold, and flotation is mainly the gold recycled in sulfide, and during cyaniding, sulfide surface can be by cyanogen
The corrosion of the medicaments such as compound, floatability substantially reduce, need to restore it again by ore grinding come the surface of " cleaning " sulfide mineral
With the ability of collecting agent effect.In order to improve the grade of gold, it is also desirable to which further fine grinding increases the degrees of dissociation of gold-carrying minerals.Institute
With the ore pulp after slurry making machine pulping need to enter ball mill and carry out fine grinding.Residual medicament due to acting on mineral surfaces can be
It is disintegrated down during fine grinding from mineral surfaces, therefore is added in an amount of the copper sulphate of 90~100g/t in the ball mill, utilized
The complexing of copper ion and Residuals is further reduced the residual medicament such as cyanide, will not produce to useful mineral floating
It is raw to inhibit, in order to increase grinding efficiency, prevent levigate mineral from generating overground, ball mill and hydrocyclone composition is closed circuit
Ore grinding, the slurry fineness of hydrocyclone overflow reach -0.038mm grain size content and account for 70~75%, make into next step flotation
Industry: being adjusted to 30~35% for gained ore pulp mass concentration after ore grinding, excessive concentration or too low is unfavorable for flotation.Adjust ore pulp
The flotation of sulfide mineral is more preferable under pH to 6~7, the pH, and the ore pulp after ore grinding is sized mixing, and then carries out roughing operation,
Rougher concentration and rougher tailings are obtained, rougher tailings scan for 3 times, scan 1 and scans 2 gained rough concentrates and roughing is coarse-fine
Mine merges, then carry out 2 times it is selected obtain Gold Concentrate under Normal Pressure, other chats sequences return to a upper flotation flowsheet, and scanning 3 tailing can be made into
Construction material.
Unless otherwise specified, the reagent used is ordinary commercial products or is obtained by conventional means preparation the present embodiment
, it is the section Example of inventor in test below that the equipment of use, which is conventional equipment in the art:
Embodiment 1
Main valuable element is gold, gold grade 3.05g/t in the cyanidation tailings of Shandong.Golden main preservation is in sulfide mineral
In oxide mineral, golden distributive law is respectively 55%, 15%, and monomeric gold and intergrowth gold content are 30%, and sulfide mineral is main
For pyrite, zincblende, galena, gangue is mainly quartz, mica and feldspar in ore, the gold being easily recycled be monomeric gold and
Gold in intergrowth gold and sulfide mineral selects cyanidation tailings preprocess method using a kind of difficulty of the present invention, and process flow chart is such as
Shown in Fig. 1, the specific steps are as follows:
(1) washup pulping: the ore pulp that mass concentration is 50% is made in cyanidation tailings sample ore, is with screen size
The stainless steel sub-sieve of 0.147mm removes the impurity such as sandstone, sawdust, and it is 40% that the ore pulp under sieving, which is sized mixing to mass concentration,；
(2) ore pulp activates: adjusting the pH to 4 of ore pulp using the concentrated sulfuric acid, copper sulphate 90g/t is then added, stirred with activation
Slot continuously stirs 2.5h；
(3) ore pulp filters pressing: by the ore pulp after activation by filter press filters pressing, so that the moisture in filter cake is 18% or so,
Filtrate processing makes the metal ions such as copper ion generate precipitating, Filtrate for by adding appropriate lime neutralisation of sulphuric acid
It staticly settles, supernatant continues on for washup graded operation；
(4) ore pulp fine grinding: by filter cake be made mass concentration be 60% ore pulp, be added copper sulphate 90g/t, ore grinding to-
0.038mm accounts for 70%, into next step flotation operation；
Gained ore pulp mass concentration after ore grinding is adjusted to 35%, sodium hydroxide adjustment pH values of pulp is added to 6, according to Fig. 1
Middle floatation process:
Roughing operation: addition waterglass 700g/t stirs 5min；Copper sulphate 120g/t is added, 5min is stirred；Addition
The Y-89 of 120g/t, 60g/t YP-35 (mercapto benzothiazole, mercaptan, sulphur nitrogen acrylic ester mass ratio be 3:1:2), stirring
3min；MIBC 15g/t is added, 2min is stirred, obtains rougher concentration and rougher tailings through roughing；
It scans operation: rougher tailings is scanned step by step, scan 1 addition waterglass 150g/t, stir 5min；Add Y-
89 100g/t, YP-35 40g/t stir 3min；MIBC 15g/t is added, 2min is stirred, scans the concentrate that 1 obtains and enter essence
1 is selected, the tailing entrance that 1 obtains is scanned and scans 2；2 addition Y-89 60g/t, YP-35 25g/t are scanned, 3min is stirred, scans 2 choosings
Obtained concentrate enters selected 1, scans the tailing entrance that 2 obtain and scans 3；3 addition Y-89 20g/t are scanned, 3min is stirred, sweeps
3 obtained concentrate returns are selected to scan 2, scanning 3 tailings is tailing, and tailing can be made into construction material.
Selected operation: to rougher concentration, scan 1 and scan carried out after 2 obtained rough concentrates merge it is selected step by step, selected 1
Waterglass 160g/t is added, 5min is stirred, selected 1 obtained concentrate enters the tailing that selected 2, selected 1 obtains and returns to roughing；Essence
Select the waterglass 15g/t of 2 addition 110g/t Linx385 (mass ratio of lignosulphonic acid, carboxymethyl cellulose and dextrin be 2:1:
2) 5min, is stirred, selected 2 obtained concentrate are as Gold Concentrate under Normal Pressure, and selected 2 obtained tailings return to selected 1, and final flotation results are such as
Shown in table 1.
Comparative example 1
By direct ore grinding after cyanidation tailings washup pulping in Shandong in embodiment 1, without pretreatment, according to embodiment 1
Middle floatation process carries out closed circuit float test to ore pulp, the specific steps are as follows:
(1) washup pulping: the ore pulp that mass concentration is 80% is made in cyanidation tailings sample ore, is with screen size
The stainless steel sub-sieve of 0.147mm removes the impurity such as sandstone, sawdust；
(2) ore pulp fine grinding: by ore pulp ore grinding mass concentration be 65% under conditions of fine grinding, make grinding fineness reach-
0.038mm grain size content accounts for 70%, into flotation operation: according to floatation process in embodiment 1, final flotation results such as 1 institute of table
Show:
The flotation results of 1 Shandong cyanidation tailings of table
From comparative test as can be seen that flotation effect is better than unpretreated after pretreatment, not only grade golden in concentrate
Than unpretreated high 6.17g/t, the rate of recovery is even more to be higher by 18.84%.
Embodiment 2
Main valuable element is gold in Sichuan microbial pretreatment-all sliming cyanidation technique cyanidation tailings, and gold grade is
4.49g/t.For golden main preservation in sulfide and gangue, golden distributive law is respectively 65%, 35%, and sulfide mineral is mainly yellow iron
Mine contains a small amount of mispickel, and gangue is mainly quartz, calcite, feldspar, and the gold being easily recycled is the gold in sulfide mineral, utilizes this
Invention provides a kind of difficulty and selects cyanidation tailings preprocess method, the specific steps are as follows:
(1) washup pulping: the ore pulp that mass concentration is 45% is made in cyanidation tailings sample ore, is with screen size
The stainless steel sub-sieve of 0.147mm removes the impurity such as sandstone, sawdust, and it is 35% that the ore pulp under sieving, which is sized mixing to mass concentration,；
(2) ore pulp activates: adjusting the pH to 5 of ore pulp using the concentrated sulfuric acid, copper sulphate 100g/t is then added, stirred with activation
Slot continuously stirs 2h；
(3) ore pulp filters pressing: by the ore pulp after activation by filter press filters pressing, so that the moisture in filter cake is 20%, filtrate
Processing makes the metal ions such as copper ion generate precipitating for by adding appropriate lime neutralisation of sulphuric acid, and Filtrate is stood
Precipitating, supernatant continue on for washup graded operation；
(4) ore pulp fine grinding: by filter cake be made mass concentration be 55% ore pulp, be added copper sulphate 100g/t, ore grinding to-
0.038mm accounts for 75%, and it is 30% that ore pulp obtained by ore grinding, which is sized mixing to mass concentration, addition sodium hydroxide adjustment pH values of pulp to 7, so
Enter next step flotation operation afterwards.
Roughing operation: addition waterglass 750g/t stirs 5min；Copper sulphate 100g/t is added, 5min is stirred；Addition
Y-89 the and 30g/t YP-35 of 150g/t stirs 3min；MIBC 18g/t is added, 2min is stirred, obtains rougher concentration through roughing
And rougher tailings；
It scans operation: rougher tailings is scanned step by step, scan 1 addition waterglass 200g/t, stir 5min；Addition
The YP-35 of the Y-89 and 50g/t of 80g/t stir 3min；Add MIBC 10g/t, stir 2min, scan concentrate that 1 obtains into
Enter selected 1, scans the entrance of 1 tailing and scan 2；Y-89 the and 30g/t YP-35 of 2 addition 50g/t is scanned, 3min is stirred, 2 is scanned and obtains
The concentrate arrived enters selected 1, scans the tailing entrance that 2 obtain and scans 3；3 addition Y-89 30g/t are scanned, 3min is stirred, scans 3
Obtained concentrate return scans 2, and scanning the tailing that 3 obtain can be made into construction material.
Selected operation: to rougher concentration, scan 1 and scan carried out after 2 obtained rough concentrates merge it is selected step by step, selected 1
Waterglass 200g/t is added, 5min is stirred, selected 1 obtained concentrate enters the tailing that selected 2, selected 1 obtains and returns to roughing；Essence
Selecting the waterglass of 2 addition 150g/t, the Linx385 of 20g/t stirs 5min, and selected 2 obtained concentrate are as Gold Concentrate under Normal Pressure, and selected 2
Obtained tailing returns to selected 1.
Comparative example 2
By direct ore grinding after cyanidation tailings washup pulping in Sichuan in embodiment 2, without pretreatment, according to embodiment 2
Middle floatation process carries out closed circuit float test to ore pulp, the specific steps are as follows:
(1) washup pulping: the ore pulp that mass concentration is 80% is made in cyanidation tailings sample ore, is with screen size
The stainless steel sub-sieve of 0.147mm removes the impurity such as sandstone, sawdust；
(2) ore pulp fine grinding: by ore pulp ore grinding mass concentration be 65% under conditions of fine grinding, make grinding fineness reach-
0.038mm grain size content accounts for 70%, into flotation operation: according to floatation process in embodiment 2, final flotation results such as 2 institute of table
Show:
The processing result of 2 Sichuan cyanidation tailings of table
From comparative test as can be seen that flotation effect is better than unpretreated after pretreatment, not only grade golden in concentrate
Than unpretreated high 12.02g/t, the rate of recovery is even more to be higher by 31.14%.
Embodiment 3
Commerical test:
Using the cyanidation tailings pretreatment of embodiment 1 and floatation process, industrial production test day output is 300 tons, is floated
The results are shown in Table 3 for choosing:
The flotation results of 3 commerical test of table
Commercial test results show cyanidation tailings preprocess method successful commercialization of the present invention, achieve and real
It tests similar in the test of room washability as a result, gold grade and the rate of recovery respectively reach 15.82g/t, 64.29%, economy effect in concentrate
It is beneficial significant.
It is found after analysis cyanide content, cyanide content is up to 190.83mg/L in cyanidation tailings raw ore, using pre- place
The filtrate of science and engineering skill cyanide content after simple process is 3.68mg/L, and cyanide content is 0.93mg/L in flotation tailing,
Cyanide content reaches national sewage discharge grade III Standard in tailing, can continue reuse, filtrate discharge after filtrate simple process
Pass through natural sedimentation and oxidation to Tailings Dam, the Residuals in waste water can be decomposed further, and cyanide content is reduced to
Within 0.96mg/L, cyanide content equally reaches national sewage discharge grade III Standard.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of difficulty selects cyanidation tailings preprocess method, comprising the following steps:
(1) washup pulping: difficulty selects cyanidation tailings washup, pulping, obtains ore pulp；
(2) ore pulp activates: adding the concentrated sulfuric acid into step (1) resulting ore pulp, while copper sulphate is added, lived after stirring
Change ore pulp；
In the step (2), the addition concentrated sulfuric acid adjusts the pH to 4~5 of ore pulp, and the additive amount of copper sulphate is that raw ore relatively per ton adds
Add 90~100 g；
(3) ore pulp filters pressing: filter cake is made in activation ore pulp filters pressing obtained by step (2), filtrate recycles after processing；
(4) by filter cake again pulping, copper sulphate, ore grinding to predetermined fineness, into next step flotation operation ore pulp fine grinding: are added.
2. difficulty according to claim 1 selects cyanidation tailings preprocess method, which is characterized in that difficult choosing in the step (1)
Cyanidation tailings remove impurity through log washer, and the mass concentration of gained ore pulp is 35~40% after pulping.
3. difficulty according to claim 1 selects cyanidation tailings preprocess method, which is characterized in that stirring in the step (2)
It is carried out in activation stirred tank, mixing time is 2~2.5h.
4. difficulty according to claim 1 selects cyanidation tailings preprocess method, which is characterized in that in the step (3), ore pulp
The specific method is as follows for filters pressing: by the ore pulp after activation by filter press filters pressing, so that the moisture in filter cake is 17~20%.
5. difficulty according to claim 1 or 4 selects cyanidation tailings preprocess method, which is characterized in that in the step (3),
Lime is added in filtrate, adjusts the pH to 7~8 of filtrate, filtrate is given up after processing using the oxidation processes of natural sedimentation and air
Water is used further to washup graded operation.
6. difficulty according to claim 1 selects cyanidation tailings preprocess method, which is characterized in that in the step (4), filter cake
Pulping in slurry making machine is fed by belt conveyor, ore pulp mass concentration is 55~60% after pulping.
7. difficulty according to claim 1 selects cyanidation tailings preprocess method, which is characterized in that in the step (4), in ball
The additive amount of copper sulphate is that raw ore relatively per ton adds 90~100 g in grinding machine.
8. difficulty according to claim 1 or claim 7 selects cyanidation tailings preprocess method, which is characterized in that in the step (4),
Ball mill and hydrocyclone are formed into closed circuit grinding, the slurry fineness of hydrocyclone overflow reaches -0.038 mm grade and contains
Amount accounts for 70~75%.
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| CN111940148A (en) * | 2020-07-27 | 2020-11-17 | 莱州市鸿铖矿业环保开发有限公司 | Comprehensive utilization and harmless treatment method for cyanidation tailings |
| CN113042190A (en) * | 2021-03-19 | 2021-06-29 | 山东金创金银冶炼有限公司 | Flotation pretreatment method for pyrite in cyanide-containing and sulfur-containing tailings |
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| CN101658819A (en) * | 2009-08-03 | 2010-03-03 | 招金矿业股份有限公司 | Multielement composite recovery process |
| CN102505077A (en) * | 2011-12-30 | 2012-06-20 | 中矿金业股份有限公司 | Method for recovering valuable elements from cyanide tailings |
| CN102784722B (en) * | 2012-08-27 | 2014-05-28 | 桐柏银矿有限责任公司 | Flotation process for cyanide tailings in silver concentrates |
| CN103831165B (en) * | 2014-03-18 | 2016-04-27 | 湖南黄金洞矿业有限责任公司 | High containing arsenic gold cyanidation tailings method for innocent treatment |
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