CN108355829A - The reselecting method of gold - Google Patents
The reselecting method of gold Download PDFInfo
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- CN108355829A CN108355829A CN201810134987.4A CN201810134987A CN108355829A CN 108355829 A CN108355829 A CN 108355829A CN 201810134987 A CN201810134987 A CN 201810134987A CN 108355829 A CN108355829 A CN 108355829A
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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
- B03B9/00—General arrangement of separating plant, e.g. flow sheets
Abstract
This disclosure relates to which a kind of reselecting method of gold, this method include：Golden raw ore is subjected to one section of ball milling, two sections of ball millings, the first gravity treatment, the second gravity treatment, ore dressing and smelting.The method that the disclosure provides can improve the rate of recovery and recovery rate in ore-dressing of golden gravity treatment.
Description
Technical field
This disclosure relates to mining technique field, and in particular, to a kind of reselecting method of gold.
Background technology
Floatation Process Theory and research were concentrated mainly on sulfide flotation electrochemical theory, oxide ore and saline minerals in recent years
The solution chemistry of flotation is theoretical, flocculating polymer and hydrophobic reunions theory and column-type floatation theory etc. in fine particles flotation, by
It is very much like so the Floatation Process Theory in relation to sulphide ore in the flotation nature of gold mineral and sulfide mineral especially copper sulfide mineral
Also there is guidance and reference function, wherein Flotation Electrochemistry theory more to have direct application value to golden flotation gold ore flotation.
The development of electrochemical theory produces a new application field, and pulp electrochemisitry, it can realize nothing by controlling pulp potential
Collecting agent flotation.Flotation without collecting agent is so that sulfide mineral is moderately aoxidized by controlling pulp potential, in its Surface Creation element
Sulphur is able to flotation to induce the hydrophobicity of mineral.
It is few seen in theoretical research for gold mineralization flotation, it has been reported that with the method for solvent floatation, it can be from oxygen
Changing the research that gold is extracted in the obtained oxidation solution containing low-grade gold of pretreatment will be golden in weak solution in homemade device
(ion flotation) is directly entered organic extractant phase recycling after emersion, and 99% gold and only has been recycled from the oxidation solution containing golden 10-6
With 2h, gold recovery 23% is improved than ion floatation method, and the time is greatlyd save again than simple solvent extraction.Solvent is floating
Choosing is possible to as the gold extracting method of physics and chemistry further combined with providing new enlightenment.
Existing reselecting method is directly entered Nelson's gravity treatment using primary grinding, and gravity concentrate is through shaker re-election, shaking table essence
Mining and metallurgy is refined, middle tailings impoundment reprocessing.For gravity treatment ore pulp through hydroclone classification, overflow pulp enters flotation, and sand setting returns to one
Section ball milling, this method gravity treatment rate of recovery and recovery rate in ore-dressing are all low.
Invention content
Purpose of this disclosure is to provide a kind of reselecting method of gold, the method that the disclosure provides can improve returning for golden gravity treatment
Yield and recovery rate in ore-dressing.
To achieve the goals above, the disclosure provides a kind of reselecting method of gold, and this method includes：
A, golden raw ore in grate ball mill is subjected to primary grinding, obtains one section of ore pulp；
B, by one section of ore pulp sieving of gained, ore pulp and the first on-the-sieve material under the first sieve are obtained；
C, gained first is sieved into lower ore pulp and is sent into the first gravity treatment of progress of the first gravity concentrator, obtain the first gravity concentrate and first
Gravity treatment ore pulp；
D, gained the first gravity treatment ore pulp is sent into hydrocyclone and carries out cyclone classification, obtain the first overflow pulp and sunk
Sand；
E, the first overflow pulp of gained is sent into the second gravity concentrator and carries out the second gravity treatment, obtain the second gravity concentrate and second
Gravity treatment ore pulp；
F, the first gravity concentrate of gained and the second gravity concentrate are sent into shaking table and carry out ore dressing, obtain table concentrate and shaking table
Middle tailing；
G, gained table concentrate is smelted, tailings impoundment in shaking table；
H, gained sand setting in overflowball mill is carried out to two sections of ball millings, obtain two sections of ore pulps；
I, by two sections of ore pulp sievings of gained, ore pulp and the second on-the-sieve material under the second sieve are obtained；
J, the lower ore pulp of the sieve of gained second is returned in the first gravity concentrator and carries out described the together with the lower ore pulp of the first sieve
One gravity treatment.
Optionally, the method further includes step k：The first on-the-sieve material of gained in step b is sent into spiral classifier
Carry out screw classifying, obtain sand return and the second overflow pulp, by grate ball mill described in gained sand return return to step a into
The second overflow pulp of gained is sent into the first gravity concentrator described in step c and carries out the first gravity treatment by one section of ball milling of row.
Optionally, step a further includes：The method further includes：The golden raw ore is subjected to washup successively and is crushed, is obtained
Gained breaking ores are sent into the grate ball mill and carry out primary grinding, gained is washed by washup ore pulp and breaking ores
Mine ore pulp is sent into the spiral classifier and carries out screw classifying；Wherein, the granularity of the breaking ores is less than 20 millimeters.
Optionally, the method further includes：The second gravity treatment ore pulp of gained in step e is sent into floatation equipment and carries out flotation,
Obtain flotation pulp；Wherein, fineness is that the particle of -200 mesh accounts for 65-70% in the flotation pulp；Medicament used in the flotation
For MA, butylamine black powder and 2# oil, on the basis of one ton of golden raw ore, floating agent dosage is：MA50-80g/t, butylamine black powder 10-
20g/t, 2# oil 100-150g/t.
Optionally, the method further includes：First the second gravity treatment ore pulp of gained in step e is sent into concentrator and is adjusted
The flotation is carried out after pulp density to 27-30% again.
Optionally, the condition of the primary grinding includes：Ore milling concentration 65-70%, milling medium 60-100mm steel balls, institute
The condition for stating two sections of ball millings includes：Ore milling concentration 55-60%, milling medium 20-55mm steel balls.
Optionally, it is sieved in drum sieve in step b and step i, drum sieve slot size is 2-10 millimeters.
Optionally, the second gravity concentrator described in the first gravity concentrator in step c and step e is Nelson's gravity concentrator；
The condition of first gravity treatment described in step c includes：Pressure of supply water is 40-60 pas, and water operating pressure is 16-35 pas,
Water flow divides three phases, is 15-25 minutes per phases-time, and water flow is 90-100 gallon per minute, and 50- is divided between ore discharge
80 minutes, the ore discharge time was 1-5 minutes, and rotating speed is 405-415 revs/min；
The condition of second gravity treatment described in step e includes：Pressure of supply water is 40-60 pas, and water operating pressure is 16-35 pas,
Water flow divides three phases, is 15-25 minutes per phases-time, and water flow is 90-100 gallon per minute, and 85- is divided between ore discharge
100 minutes, the ore discharge time was 1-5 minutes, and rotating speed is 405-415 revs/min.
Optionally, the grade of the table concentrate is 27-32%.
Optionally, the condition of cyclone classification described in step d includes：Hydrocyclone internal diameter is 300-400mm, handles energy
Power is 74-90 cubes m/h, a diameter of 40-80mm of spigot；
The condition of screw classifying described in step k includes：Spiral classifier internal diameter is 1-3m, and power is 5-10 kilowatts.
The disclosed invention people has been surprisingly found that, by the sand setting and ore pulp after one section of ball milling, one section of gravity treatment and classification, is dividing
It so that gold particle is dissociated and is recycled, improve the gravity treatment rate of recovery after two sections of ball millings and two sections of gravity treatments
And recovery rate in ore-dressing.
Other feature and advantage of the disclosure will be described in detail in subsequent specific embodiment part.
Description of the drawings
Attached drawing is for providing further understanding of the disclosure, and a part for constitution instruction, with following tool
Body embodiment is used to explain the disclosure together, but does not constitute the limitation to the disclosure.In the accompanying drawings：
Fig. 1 includes a kind of flow diagram of specific implementation mode of reselecting method of disclosure gold, also includes disclosure gold
A kind of structural schematic diagram of specific implementation mode of gravitational separation equipment.
Fig. 2 is a kind of flow diagram of specific implementation mode of reselecting method of existing gold.
Reference sign
1 grate ball mill 2 first sieves 3 first gravity concentrator of mine device
4 shaking table, 5 hydrocyclone, 6 second gravity concentrator
7 overflowball mills 8 second sieve 9 smelting device of mine device
10 spiral classifiers 11 wash 12 flotation unit of crushing plant
13 collection vessel, 14 concentrator
Specific implementation mode
The specific implementation mode of the disclosure is described in detail below in conjunction with attached drawing.It should be understood that this place is retouched
The specific implementation mode stated is only used for describing and explaining the disclosure, is not limited to the disclosure.Such as without special theory in the disclosure
Bright, percentage is weight percentage.
The reselecting method of existing gold carries out washup and is crushed successively as shown in Fig. 2, golden raw ore is passed through washing breaker,
Washup ore pulp and breaking ores are obtained, breaking ores, which are then sent into overflowball mill, carries out ball milling, obtains ball milling ore pulp；It will
Gained ball milling ore pulp, which enters in the sieve mine device drum sieve that for example sieve pore is 3 millimeters, to be sieved, and obtains under on-the-sieve material and sieve
Ore pulp；Gained is sieved lower ore pulp to be sent into gravity concentrator after progress gravity treatment, obtains gravity treatment ore pulp and gravity concentrate；Gravity treatment ore pulp is sent
After entering hydrocyclone progress cyclone classification, gained sand setting enters overflowball mill and carries out ball milling, and gained overflow pulp is sent
Enter flotation unit and carries out flotation；After gravity concentrate is sent into shaking table progress ore dressing, tailing in table concentrate and shaking table is obtained, by institute
Table concentrate feeding smelting device is obtained to be smelted to obtain finished product gold.Furthermore it is possible to which on-the-sieve material obtained by mine device will be sieved into one
It walks and carries out screw classifying in spiral classifier together with the washing ore pulp from washing breaker, obtain sand return and return to overflow
In type ball mill, obtains overflow pulp and be sent into gravity concentrator.
The inventor of the disclosure has been surprisingly found that in transformation, sand setting obtained by above-mentioned hydroclone classification is carried out further
Ball milling and screening return in the first gravity concentrator, and increase by the second gravity concentrator, can improve the gravity treatment rate of recovery and recovery rate in ore-dressing, have
Body method is as shown in Figure 1, include the following steps：A, golden raw ore in grate ball mill is subjected to primary grinding, obtains one section
Ore pulp；B, by one section of ore pulp sieving of gained, ore pulp and the first on-the-sieve material under the first sieve are obtained；C, gained first is sieved into lower ore pulp
It is sent into the first gravity concentrator and carries out the first gravity treatment, obtain the first gravity concentrate and the first gravity treatment ore pulp；D, by the first gravity ore of gained
Slurry is sent into hydrocyclone and carries out cyclone classification, obtains the first overflow pulp and sand setting；E, the first overflow pulp of gained is sent into
Second gravity concentrator carries out the second gravity treatment, obtains the second gravity concentrate and the second gravity treatment ore pulp；F, by the first gravity concentrate of gained and
Second gravity concentrate is sent into shaking table and carries out ore dressing, obtains tailing in table concentrate and shaking table；G, gained table concentrate is subjected to smelting
It refines, tailings impoundment in shaking table；H, gained sand setting in overflowball mill is carried out to two sections of ball millings, obtain two sections of ore pulps；I, will
Two sections of ore pulp sievings of gained, obtain ore pulp and the second on-the-sieve material under the second sieve；J, gained second is sieved into lower ore pulp and returns to first
In gravity concentrator first gravity treatment is carried out with together with the lower ore pulp of first sieve.
The disclosed invention people is the reason of analysis above-mentioned technical proposal can obtain the good rate of recovery：In the gravity treatment of gold
In the process, degree of dissociation is important one of index, and degree of dissociation refers to after gold ore carries out broken and ore grinding, target ore with it is other
The degree of ore classification, degree of dissociation is higher, and the golden gravity treatment rate of recovery is better.Secondary grinding and two are added in disclosed method
Duan Chongxuan and etc., the degree of dissociation of gold can be dramatically increased under the comprehensive function of above-mentioned steps.
According to the disclosure, the ore drawing mode of grate ball mill is to force ore discharge, is roughly ground to golden raw ore, in order to improve
The grinding efficiency of grate ball mill and the burden for reducing the first gravity concentrator and overflowball mill, as shown in Figure 1, the method
Can also include step k：The first on-the-sieve material of gained in step b is sent into spiral classifier and carries out screw classifying, is returned
Sand and the second overflow pulp will carry out one section of ball milling in grate ball mill described in gained sand return return to step a, by gained the
Two overflow pulps are sent into the first gravity concentrator described in step c and carry out the first gravity treatment.It can be sieved to first by spiral classifier
Upper material is sieved, and the sand return of bulky grain is returned and carries out one section of ball milling in grate ball mill, and will contain little particle mine
Second overflow pulp of stone is sent into the first gravity concentrator and carries out gravity treatment, reduces the negative of overflowball mill and the first gravity concentrator respectively
Load.
According to the disclosure, the size of the ore acquired from mining site, which should not be sent directly into grate ball mill, carries out ball milling,
Therefore, as shown in Figure 1, step a can also include：The method further includes：The golden raw ore is subjected to washup successively and is crushed,
Washup ore pulp and breaking ores are obtained, gained breaking ores are sent into the grate ball mill and carry out primary grinding, by institute
It obtains in the washup ore pulp feeding spiral classifier and carries out screw classifying；Wherein, the granularity of the breaking ores is less than 20 millimeters.
It is well-known to those skilled in the art that golden raw ore, which carries out broken method, for example, may be used jaw crushing, gyratory crusher,
The modes such as high electric field pulse and kibbler roll are crushed, and the progress such as double-deck screen shale shaker may be used in washup, to obtain granularity
Satisfactory breaking ores.Gained washup ore pulp can be carried out as the classification liquid of spiral classifier to the first on-the-sieve material point
Then grade is used as the second overflow pulp to be sent into the first gravity concentrator, improves the recovery utilization rate of ore in washup ore pulp, and save
About water resource reduces cost.
According to the disclosure, as shown in Figure 1, the method can also include：The second gravity treatment ore pulp of gained in step e is sent into
Floatation equipment carries out flotation, obtains flotation pulp；Wherein, fineness can account for 65- for the particle of -200 mesh in the flotation pulp
70%, the excessively high rate of recovery that can reduce flotation of fineness.Flotation generally uses floating agent by the target mine in the second gravity treatment ore pulp
Slurry is taken away under floating agent effect by the form of bubble, and the larger target ore pulp of density, the medication of disclosure flotation institute are left
Agent can be MA, butylamine black powder and 2# oil, and on the basis of one ton of golden raw ore, floating agent dosage can be：MA50-80g/t, fourth
Amido black medicine 10-20g/t, 2# oil 100-150g/t, those skilled in the art can also use other flotation conditions to carry out flotation, this
It is open to repeat no more.
According to the disclosure, in order to save surfactant and water, as shown in Figure 1, the method can also include：It first will step
The second gravity treatment ore pulp of gained is sent into concentrator to be adjusted after pulp density to 27-30% in rapid f carries out the flotation again.It is dense
Close machine is improved the second gravity treatment ore pulp solid concentration by the way of free settling classification, ensure that flotation pulp concentration,
To reduce the use of floating agent in floatation process, but also the clarified solution being classified can be returned with to other processing steps
In, save water resource.
According to the disclosure, ball mill is generally ground ore as abrasive media using steel ball, to reduce ore
Granularity, disclosure primary grinding carries out in grate ball mill, and using the ore discharge form for forcing ore discharge, condition can wrap
It includes：Ore milling concentration 65-70%, milling medium 60-100mm steel balls, disclosure secondary grinding carry out in overflowball mill,
For unforced high charge level ore discharge, discharge velocity is slow, and mineral aggregate residence time in machine is long, and ore grinding is thinner, two sections of ball millings
Condition may include：Ore milling concentration 55-60%, milling medium 20-55mm steel balls.
According to the disclosure, ore pulp sieving so as to sieve lower ore pulp for by the ore classification of larger particles in ore pulp, being conducive to
It can be sieved in drum sieve in subsequent gravity treatment, step b and step i, drum sieve slot size can be 2-10 millis
Rice, for example, 3 millimeters.
According to the disclosure, gravity treatment refer to using be sorted relative density between mineral grain, granularity, the difference of shape and its
The difference of movement rate and direction in medium (such as water), is allowed to the beneficiation method being classified each other, the first gravity concentrator in step c
It all can be Nelson's gravity concentrator with the second gravity concentrator described in step e；The condition of first gravity treatment described in step c can wrap
It includes：Pressure of supply water is 40-60 pas, and water operating pressure is 16-35 pas, and water flow divides three phases, is 15-25 points per phases-time
Clock, water flow are 90-100 gallon per minute, are divided into 50-80 minutes between ore discharge, and the ore discharge time is 1-5 minutes, rotating speed 405-
415 revs/min；The condition of second gravity treatment described in step e may include：Pressure of supply water is 40-60 pas, and water operating pressure is
16-35 pas, water flow divide three phases, are 15-25 minutes per phases-time, and water flow is 90-100 gallon per minute, between ore discharge
It is divided into 85-100 minutes, the ore discharge time is 1-5 minutes, and rotating speed is 405-415 revs/min.Those skilled in the art can also adopt
With other gravitational separation equipments and condition, the disclosure repeats no more.
According to the disclosure, shaking table refers to different by its density and granularity using ore particle and moves and be classified out along different directions
The grade of the products such as concentrate, middle concentrate and tailings, disclosure table concentrate can reach 27-32%.
According to the disclosure, cyclone classification refers to the side that the centrifugal force difference using ore in the water of eddy flow is classified
Method, screw classifying refer to the method being classified using the difference of particle weight difference sinking speed in water.Described in step d
The condition of cyclone classification may include：Hydrocyclone internal diameter is 300-400mm, and processing capacity is 74-90 cubes m/h,
The a diameter of 40-80mm of spigot；The condition of screw classifying described in step k may include：Spiral classifier internal diameter is 1-3m, work(
Rate is 5-10 kilowatts.
As shown in Figure 1, the disclosure also provides a kind of gravitational separation equipment of gold, which includes that grate ball mill 1, first sieves
Mine device 2, the first gravity concentrator 3, shaking table 4, hydrocyclone 5, the second gravity concentrator 6, overflowball mill 7, second sieve mine device 8
With smelting device 9；The grate ball mill 1 is provided with feed inlet and one section of slurry outlet, and the first sieve mine device 2 is arranged
There are the lower slurry outlet of feed inlet, the first sieve and the outlet of the first on-the-sieve material, first gravity concentrator 3 to be provided with feed inlet, first
Gravity concentrate exports and the first gravity treatment slurry outlet, tailing during the shaking table 4 is provided with feed inlet, table concentrate exports and shaking table
Outlet, the hydrocyclone 5 are provided with feed inlet, the outlet of the first overflow pulp and sand setting outlet, second gravity concentrator 6 and set
Be equipped with feed inlet, the second gravity treatment slurry outlet and the second gravity concentrate outlet, the overflowball mill 7 be provided with feed inlet and
Two sections of slurry outlets, the second sieve mine device 8 are provided with feed inlet, the outlet of the second on-the-sieve material and the lower ore pulp of the second sieve and go out
Mouthful；One section of slurry outlet of the grate ball mill 1 is connected to the feed inlet of the first sieve mine device 2, first sieve
The lower slurry outlet of the first sieve of mine device 2 is connected to the feed inlet of first gravity concentrator 3, and the first of first gravity concentrator 3
Gravity concentrate exports and the second gravity concentrate of second gravity concentrator 6 is exported and is connected to the feed inlet of the shaking table, and described the
First gravity treatment slurry outlet of one gravity concentrator 3 is connected to the feed inlet of the hydrocyclone 5, and the of the hydrocyclone 5
The outlet of one overflow pulp is connected to the feed inlet of second gravity concentrator 6, table concentrate outlet and the smelting of the shaking table 4
The feed inlet of device 9 is connected to, and the sand setting outlet of the hydrocyclone 5 is connected to the feed inlet of the overflowball mill 7, institute
Two sections of slurry outlets for stating overflowball mill 7 are connected to the feed inlet of the second sieve mine device 8, the second sieve mine device
The 8 lower slurry outlet of the second sieve is connected to the feed inlet of first gravity concentrator 3.The method for providing equipment using the disclosure, energy
Enough improve the gravity treatment rate of recovery and recovery rate in ore-dressing of gold mine.
According to the disclosure, in order to reduce the burden of the first gravity concentrator and overflowball mill, as shown in Figure 1, the equipment
Can also include spiral classifier 10, the spiral classifier 10 can be provided with feed inlet, sand return outlet and the second overflow mine
Slurry outlet, the feed inlet of the spiral classifier 10 can with the first on-the-sieve material outlet of the first sieve mine device 2,
The second overflow pulp outlet of the spiral classifier 10 can be connected to the feed inlet of first gravity concentrator 3, the spiral
The sand return outlet of grader 10 can be connected to the feed inlet of the grate ball mill 1.It can be to by spiral classifier
One on-the-sieve material is sieved, and the sand return of bulky grain ore is returned and carries out one section of ball milling in grate ball mill, and will be contained
Short grained second overflow pulp is sent into the first gravity concentrator and carries out gravity treatment, reduces overflowball mill and the first gravity concentrator respectively
Burden.
According to the disclosure, the size of the ore acquired from mining site should not be sent directly into lattice type generally at 20 centimetres or more
Ball milling is carried out in ball mill, therefore, as shown in Figure 1, the equipment can also include washing crushing plant 11, the washing is broken
Equipment 11 can be provided with golden raw ore entrance, washup slurry outlet and breaking ores outlet, the washing crushing plant 11 and wash
Mine slurry outlet can be connected to the feed inlet of the spiral classifier 10, the breaking ores outlet of the washing crushing plant 11
It can be connected to the feed inlet of the grate ball mill 1.The washing crushing plant 11 may include wash mill and be crushed
Device, wash mill can be double-deck screen shale shaker etc., and breaker can be that jaw crusher, high electric field pulse machine and roll-type are broken
Broken machine etc..
According to the disclosure, as shown in Figure 1, the equipment can also include flotation unit 12, the of second gravity concentrator 6
The outlet of two gravity ores slurry can be connected to the feed inlet of the flotation unit 12.In addition, in order to save surface-active used in flotation
Agent and water, second gravity concentrator 6 can be in fluid communication by concentrator 14 and the flotation unit 12.Concentrator is using freely
The mode of classification of sedimentation improves the second gravity treatment ore pulp solid concentration, flotation pulp concentration is ensure that, to reduce flotation
The use of floating agent in the process, but also the clarified solution being classified can be returned in other processing steps, save water
Resource.
According to the disclosure, sieve mine device is used for the ore classification of larger particles in ore pulp, so that the lower ore pulp of sieve is conducive to
Subsequent gravity treatment, for example, the first sieve mine device 2 and the second sieve mine device 8 all can be drum sieve, the sieve of the drum sieve
Hole size can be 2-10 millimeters, for example, 3 millimeters.
According to the disclosure, gravity treatment refer to using be sorted relative density between mineral grain, granularity, the difference of shape and its
The difference of movement rate and direction, is allowed to the choosing being classified each other in medium (water, air or the larger liquid of other relative densities)
Mine method, first gravity concentrator, 3 and second gravity concentrator 6 all can be Nelson's gravity concentrator.
According to the disclosure, the second on-the-sieve material is generally broken iron ball, and the equipment can also include collection vessel 13,
The collection vessel 13 can be located at the downstream for the second on-the-sieve material outlet that described second sieves mine device 8, to be crushed
Iron ball carries out subsequent processing after being collected separately.
It will further illustrate the disclosure by embodiment below, but the disclosure is not therefore any way limited.
Amount of metal golden in golden amount of metal/raw ore in the gravity treatment rate of recovery=gravity treatment products obtained therefrom；
Recovery rate in ore-dressing=select amount of metal golden in amount of metal/raw ore golden in product.
Embodiment
Embodiment selects factory to carry out in Jin Tao companies, and it is 650-680t to select factory's day output, and detailed process is as shown in Figure 1：
Golden raw ore (grade 2.5-6.4g/t) is sent into washing breaker to be washed and be crushed, in washup ore pulp
Miberal powder accounts for raw ore 15% or so, and breaking ores final size is -20mm.
Breaking ores are subjected to ore grinding, (24m (internal diameter) × 30m is (long through grate ball mill by the breaking ores of -20mm
Degree)) primary grinding is carried out, the condition of primary grinding includes：Ore milling concentration 65-70%, milling medium 80mm steel balls, ball load
25.8 tons, installed capacity 300kw.One section of ore pulp carries out sieve mine, the first sieve of -3mm as the 3mm drum sieves of the first sieve mine device
Lower ore pulp enters carries out one section of gravity treatment, 1# Nelsons weight as 1# Nelson's gravity concentrators (model KSD-30) of the first gravity concentrator
The machine operating condition of choosing is：Pressure of supply water：40-60Psia.Water operating pressure:16-35Psia, water flow：Divide three phases, per rank
Section 20 minutes, respectively 98,95,93gpm (gallon per minute).A mine, 2 minutes ore discharge time, rotating speed 405- are arranged per hour
415rpm.The spiral classifier that the washup ore pulp of the first on-the-sieve material of+3mm and washing breaker enters φ 2m carries out spiral
Classification, screw classifying acc power are 7.5 kilowatts, and classification gained sand return enters grate ball mill, and the second overflow pulp enters 1#
Nelson's gravity concentrator carries out one section of gravity treatment, and the first gravity treatment ore pulp solid concentration is controlled in 58-60%.First gravity treatment ore pulp is defeated by pumping
It send to two hydrocyclones of φ 350mm and carries out cyclone classification, 74-90 cubes m/h of processing capacity, spigot is a diameter of
60mm, cyclone classification gained sand setting enter overflowball mill and carry out secondary grinding, and the condition of secondary grinding includes：Ore milling concentration
55-60%, milling medium 40mm steel balls, 20 tons of ball load, installed capacity 210kw.Two sections of ore pulps, which are sent into, obtained by secondary grinding makees
Two sections of sieve mines are carried out for the 3mm drum sieves of the second sieve mine device, the lower ore pulp ore discharge of the second sieve enters 1# Nelsons gravity concentrator and carries out weight
It selects (particulate gold of monomer dissociation again is recycled), the second on-the-sieve material (broken steel ball) enters collection vessel.First overflow
Ore pulp enter as the 2# Nelsons gravity concentrator of the second gravity concentrator carry out again gravity treatment recycling in 1# Nelson's gravity treatment ore discharges not
By the particulate gold in the ore pulp of gravity treatment, 2# Nelson's gravity concentrator operating conditions：90 minutes ore discharge time, other conditions and 1# Buddhist nun
Ademilson is consistent.First gravity concentrate and the second gravity concentrate carry out ore dressing processing through shaking table (model GT-1000), shake
Bed concentrate grade is 27-32%, and table concentrate is smelted, middle tailings impoundment.Second gravity treatment ore pulp adjusts concentration through φ 18m concentrators
Into flotation, (floating agent MA, butylamine black powder and 2# oil, MA and butylamine black powder are diluted to the use of concentration 8%, and 2# oil stostes add
Add, on the basis of one ton of golden raw ore, floating agent dosage is：MA70g/t, butylamine black powder 15g/t, 2# oil 120g/t, fineness-
200 mesh 65%-70%, concentration 27%-30%).
Comparative example
Gravity treatment is carried out according to the flow of Fig. 2, concrete operations condition is identical as embodiment, and difference lies in be not provided with lattice type ball
Grinding machine, the second sieve mine device, the second gravity concentrator, collection vessel and concentrator.
Through data analysis found that embodiment compared with comparative example, improves the gravity treatment rate of recovery 6.35%, raising recovery rate in ore-dressing
3.42%, gold particle can obtain fully dissociating and recycling, annual recovery rate in ore-dressing increase economic benefit 96% or so
827.28 ten thousand yuan, shaking table chats average grade in 900g/t or so, shaking table tailings grade in 180g/t or so.
The preferred embodiment of the disclosure is described in detail above in association with attached drawing, still, the disclosure is not limited to above-mentioned reality
The detail in mode is applied, in the range of the technology design of the disclosure, a variety of letters can be carried out to the technical solution of the disclosure
Monotropic type, these simple variants belong to the protection domain of the disclosure.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, can be combined by any suitable means, in order to avoid unnecessary repetition, the disclosure to it is various can
The combination of energy no longer separately illustrates.
In addition, arbitrary combination can also be carried out between a variety of different embodiments of the disclosure, as long as it is without prejudice to originally
Disclosed thought equally should be considered as disclosure disclosure of that.
Claims (10)
1. a kind of reselecting method of gold, this method include：
A, golden raw ore in grate ball mill is subjected to primary grinding, obtains one section of ore pulp；
B, by one section of ore pulp sieving of gained, ore pulp and the first on-the-sieve material under the first sieve are obtained；
C, gained first is sieved into lower ore pulp and is sent into the first gravity treatment of progress of the first gravity concentrator, obtain the first gravity concentrate and the first gravity treatment
Ore pulp；
D, gained the first gravity treatment ore pulp is sent into hydrocyclone and carries out cyclone classification, obtain the first overflow pulp and sand setting；
E, the first overflow pulp of gained is sent into the second gravity concentrator and carries out the second gravity treatment, obtain the second gravity concentrate and the second gravity treatment
Ore pulp；
F, the first gravity concentrate of gained and the second gravity concentrate are sent into shaking table and carry out ore dressing, obtain tail in table concentrate and shaking table
Mine；
G, gained table concentrate is smelted, tailings impoundment in shaking table；
H, gained sand setting in overflowball mill is carried out to two sections of ball millings, obtain two sections of ore pulps；
I, by two sections of ore pulp sievings of gained, ore pulp and the second on-the-sieve material under the second sieve are obtained；
J, gained second is sieved in the first gravity concentrator of lower ore pulp return and carries out first weight with together with the lower ore pulp of the first sieve
Choosing.
2. according to the method described in claim 1, the method further includes step k：The first on-the-sieve material of gained in step b is sent
Enter and carry out screw classifying in spiral classifier, obtain sand return and the second overflow pulp, by lattice described in gained sand return return to step a
One section of ball milling is carried out in subtype ball mill, and the second overflow pulp of gained is sent into the first gravity concentrator described in step c and carries out the
One gravity treatment.
3. according to the method described in claim 2, wherein, step a further includes：The method further includes：By the golden raw ore according to
Secondary progress washup and broken, obtains washup ore pulp and breaking ores, gained breaking ores is sent into the grate ball mill
Primary grinding is carried out, gained washup ore pulp is sent into the spiral classifier and carries out screw classifying；Wherein, the breaking ores
Granularity be less than 20 millimeters.
4. according to the method described in claim 1, the method further includes：The second gravity treatment ore pulp of gained in step e is sent into floating
Optional equipment carries out flotation, obtains flotation pulp；Wherein, fineness is that the particle of -200 mesh accounts for 65-70% in the flotation pulp；Institute
It is MA, butylamine black powder and 2# oily to state medicament used in flotation, and on the basis of one ton of golden raw ore, floating agent dosage is：MA50-80g/
T, butylamine black powder 10-20g/t, 2# oil 100-150g/t.
5. according to the method described in claim 4, the method further includes：First the second gravity treatment ore pulp of gained in step e is sent into
It is adjusted in concentrator after pulp density to 27-30% and carries out the flotation again.
6. according to the method described in claim 1, wherein, the condition of the primary grinding includes：Ore milling concentration 65-70%, mill
Mine medium 60-100mm steel balls, the condition of two sections of ball millings include：Ore milling concentration 55-60%, milling medium 20-55mm steel
Ball.
7. according to the method described in claim 1, wherein, be sieved in drum sieve in step b and step i, drum sieve
Slot size is 2-10 millimeters.
8. according to the method described in claim 1, wherein, the second gravity concentrator described in the first gravity concentrator and step e in step c
It is Nelson's gravity concentrator；
The condition of first gravity treatment described in step c includes：Pressure of supply water is 40-60 pas, and water operating pressure is 16-35 pas, flow
Amount divides three phases, is 15-25 minutes per phases-time, and water flow is 90-100 gallon per minute, and 50-80 points are divided between ore discharge
Clock, ore discharge time are 1-5 minutes, and rotating speed is 405-415 revs/min；
The condition of second gravity treatment described in step e includes：Pressure of supply water is 40-60 pas, and water operating pressure is 16-35 pas, flow
Amount divides three phases, is 15-25 minutes per phases-time, and water flow is 90-100 gallon per minute, and 85-100 points are divided between ore discharge
Clock, ore discharge time are 1-5 minutes, and rotating speed is 405-415 revs/min.
9. according to the method described in claim 1, wherein, the grade of the table concentrate is 27-32%.
10. according to the method described in claim 2, wherein, the condition of cyclone classification described in step d includes：Hydrocyclone
Internal diameter is 300-400mm, and processing capacity is 74-90 cubes m/h, a diameter of 40-80mm of spigot；
The condition of screw classifying described in step k includes：Spiral classifier internal diameter is 1-3m, and power is 5-10 kilowatts.
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| RU2814048C1 (en) * | 2023-12-13 | 2024-02-21 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Method for gravitational extraction of gold during placer beneficiation |
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| RU2814049C1 (en) * | 2023-11-24 | 2024-02-21 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Method for gravitational extraction of gold during placer beneficiation |
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| RU2814042C1 (en) * | 2023-11-24 | 2024-02-21 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Method for gravitational extraction of gold during placer processing |
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