CN106861891B - A kind of method for separating of low-grade black and white tungsten ore - Google Patents
A kind of method for separating of low-grade black and white tungsten ore Download PDFInfo
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- CN106861891B CN106861891B CN201710050999.4A CN201710050999A CN106861891B CN 106861891 B CN106861891 B CN 106861891B CN 201710050999 A CN201710050999 A CN 201710050999A CN 106861891 B CN106861891 B CN 106861891B
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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
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
Abstract
The invention discloses a kind of method for separating of low-grade black and white tungsten ore, including：By black and white tungsten ore that particle diameter is 0.20mm~0.50mm by obtaining tungsten rough concentrate I after spiral concentrator roughing and table concentration；By black and white tungsten ore that particle diameter is 0.04mm~0.20mm by obtaining tungsten rough concentrate II after spiral chute roughing and table concentration；Black and white tungsten ore of the particle diameter less than 0.04mm is obtained into floating sulphur mine tailing by sulfide flotation, the floating sulphur mine tailing obtains thin mud tungsten rough concentrate by black and white tungsten bulk flotation, the collecting agent of the black and white tungsten bulk flotation includes 60g/t~120g/t xanthate, the black tungsten collecting agents of 400g/t~600g/t and the white tungsten collecting agents of 30g/t~50g/t, and thin mud tungsten concentrate is obtained using centrifugal ore separator is selected to thin mud tungsten rough concentrate progress.Tungsten concentrate overall recovery obtained by the method for separating is high, and the utilization rate of mine resources is high, and production cost is low.
Description
Technical field
The present invention relates to a kind of beneficiation method of tungsten ore, more particularly to a kind of method for separating of black and white tungsten ore.
Background technology
Tungsten ore mineral deposit average grade is low, black and white tungsten causes ore-dressing technique difficulty to be the master for restricting tungsten ore exploitation greatly to metabiosis
Want reason.The mineral composition of its ore and mineral characteristic and embedding cloth relation etc. are complicated more than Quartz-vein Type Tungsten Deposits, and mineral species
It is more, belong to refractory ore.Tungsten, molybdenum grade are low in raw ore, and between 0.1%~0.3%, average grade is tungsten grade majority
0.233%, the average grade of association molybdenum is 0.024%, therefore to obtain qualified tungsten concentrate and its difficulty of molybdenum concntrate is larger.Have
Of different thickness with mineral disseminated grain size and partially thin, grain size intervals scope is wider, and the granularity of scheelite is mainly distributed on 0.02mm
Between~1.28mm, and the minor axis granularity of wolframite is mainly distributed between 0.01mm~1.28mm, and this is just rational to determining
Mog and flowage structure bring difficulty.For black and white tungsten for the ore deposit of metabiosis, tungsten is mainly with black tungsten in primary ore
Ore deposit and scheelite mineral forms are present, and the wherein tungsten in wolframite accounts for 50.82%, and the tungsten in scheelite accounts for 49.18%, wolframite
With the ratio approximation 1 of tungsten in scheelite:1.Scheelite and wolframite floatability difference are big, effectively flotation to be difficult synchronously.Can be very
The collecting agent of good Scheelite Flotation ore deposit, generally poor to the collecting ability of wolframite, conventional collecting agent is difficult while effective flotation
Scheelite and wolframite, and obtain final tungsten concentrate.Scheelite proportion is small compared with wolframite, with the conventional gravity treatment side for reclaiming wolframite
It is poor that method sorts fine fraction scheelite effect.Therefore it is very big to obtain higher recovery rate in ore-dressing difficulty.And with Tungsten smelting technology
Progress, black and white tungsten concentrate separation it is unnecessary.
CN104128251A discloses a kind of beneficiation method of tungsten slurry, and it is directed to the secondary production of each operation of tungsten Beneficiation flowsheet
Product tungsten slurry, first tungsten slurry be divided to more than 0.074mm and less than two rank classifications of 0.074mm, to more than 0.074mm's
Tungsten slurry carries out ore dressing using table concentration mode, and multiple flotation mode is used for the tungsten slurry less than 0.074mm, but only
Using table concentration, because shaking table floor space is big and treating capacity is smaller, it is necessary to could be reached using more shaking tables and manual debugging
To required scale treating capacity, recruitment cost and investment is caused to increase；The floating agent that its flotation uses is only capable of reclaiming white tungsten, can not
The black tungsten of flotation and white tungsten simultaneously, and the rate of recovery of the beneficiation method of the tungsten slurry only reaches 61.74~65.64%.
CN105312148A discloses a kind of beneficiation enrichment method of association scheelite mine tailing suitable for molybdenite flotation,
It obtains wolframite by magnetic separation, then obtains scheelite by classification gravity concentration, and its final tungsten concentrate grade only has 40.83~
42.28%, the rate of recovery is 56.35~64.70%, and the main reason for analyzing its grade and the low rate of recovery is as follows：1st, the classification
In -0.045mm fine fractions by the way of shaking table and centrifuge collocation re-selection process, but the p- 0.045mm of shaking table is fine-graded
Gravity treatment effect is poor；2nd, the chats that secondary grading only obtains to gravity treatment after scalping in this method, the grade of concentrate are relatively low.
The tungsten concentrate rate of recovery obtained by the method for separating of current low-grade black and white tungsten is low and can not realize that the mixing of black and white tungsten is floating
Choosing, the utilization rate of mine resources are not high enough.
The content of the invention
It is an object of the invention to overcome the deficiency of prior art, there is provided a kind of method for separating of low-grade black and white tungsten ore,
Tungsten concentrate overall recovery obtained by the method for separating of the low-grade black and white tungsten is high and can realize the bulk flotation of black and white tungsten and recovery
Rate is high, and the utilization rate of mine resources is high, and production cost is low.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of method for separating of low-grade black and white tungsten ore, including：
By particle diameter be 0.20mm~0.50mm black and white tungsten ore by spiral concentrator roughing with being obtained after table concentration
Tungsten rough concentrate I；
By black and white tungsten ore that particle diameter is 0.04mm~0.20mm by obtaining tungsten after spiral chute roughing and table concentration
Rough concentrate II；
Black and white tungsten ore of the particle diameter less than 0.04mm is obtained into floating sulphur mine tailing by sulfide flotation, the floating sulphur mine tailing leads to
Cross black and white tungsten bulk flotation and obtain thin mud tungsten rough concentrate, the collecting agent of the black and white tungsten bulk flotation includes 60g/t~120g/t
The black tungsten collecting agent of xanthate, 400g/t~600g/t and the white tungsten collecting agents of 30g/t~50g/t, using centrifugal ore separator to described thin
The progress of mud tungsten rough concentrate is selected to obtain thin mud tungsten concentrate.
Compared with prior art, black and white tungsten ore is classified, can makes gravity treatment or floatation equipment more easily by phase
The valuable rock in the ore of particle diameter grade and impurity separation are answered, valuable rock loss is reduced, improves ore recovery ratio.Pass through this
The black and white tungsten flotation collector of invention can simultaneously Flotation Wolframite stone and scheelite stone, by add 60g/t~120g/t Huang
Medicine lifts the collecting effect of black tungsten collecting agent and white tungsten collecting agent, so as to improve the grade and the rate of recovery of thin mud tungsten rough concentrate.And
The xanthate of 60g/t~120g/t dosage can take into account concentrate WO3Grade, WO3The rate of recovery and production cost.
The method for separating is using spiral chute or spiral concentrator to low-grade black and white tungsten tcrude ore preconcentration, energy
Enough increase disposal ability of the shaking table to tcrude ore, while to black and white tungsten ore of the particle diameter less than 0.04mm by the way of flotation,
So as to improve the grade of tungsten concentrate and the rate of recovery.If do not pass through spiral concentrator or spiral chute preconcentration black and white tungsten ore
Table concentration is just directly entered, because shaking table sorts concentration ratio height, can cause that table concentrate band is narrow, concentrate interception is difficult, concentrate production
Phenomena such as rate is low, the rate of recovery is not high, metal loss is serious produces.Because table concentration mode is less than 0.04mm black and white to particle diameter
Tungsten ore treatment effect is undesirable, therefore, the black and white tungsten ore that particle diameter is less than 0.04mm is handled by the way of the flotation of the present invention,
From the point of view of implementation result, particle diameter less than 0.04mm scheelite and wolframite can synchronously effective flotation, and the rate of recovery height.
Further, the black tungsten collecting agent is benzyl hydroximic acid, and the white tungsten collecting agent is enuatrol.Benzyl hydroximic acid
Collecting effect to black tungsten is good, and the collecting effect of enuatrol dialogue tungsten is good, and xanthate combines to benzyl hydroximic acid and enuatrol
The lifting effect of black and white tungsten bulk flotation collecting agent becomes apparent from.
Further, also comprise the following steps：Using hydraulic classiciation case by the tungsten rough concentrate I and the tungsten rough concentrate II
It is divided into by particle diameter more than 0.20mm, 0.10mm~0.20mm and less than tri- particle diameter ranks of 0.10mm, described in each particle diameter rank
Tungsten rough concentrate obtains tungsten concentrate after using corresponding shaking table roughing and corresponding shaking table final election.It is coarse-fine by secondary grading gravity treatment tungsten
Ore deposit, lift the grade of tungsten concentrate.
Further, the thin mud tungsten rough concentrate is included with the selected step of the centrifugal ore separator：Described in layered shaping
Thin mud tungsten rough concentrate, upper strata thin mud tungsten rough concentrate obtain thin mud tungsten concentrate using the larger centrifugal ore separator of centrifugal force is selected, and
Lower floor's thin mud tungsten rough concentrate obtains thin mud tungsten concentrate using the less centrifugal ore separator of centrifugal force is selected.Thin mud tungsten rough concentrate is not by
Handled respectively with grade particle, the larger centrifuge processing of thicker particle centrifugal force, relatively fine particle centrifugal force is less
Centrifuge processing, effectively avoids the thin mud tungsten rough concentrate of coarse grain footpath and fine grain from being interfered in refining process, so as to improve
Thin mud tungsten concentrate grade and the rate of recovery.The larger centrifugal ore separator model of the centrifugal force that is used in the selected operation of thin mud tungsten
SLON-2400, certainly, the larger centrifugal ore separator of the centrifugal force can also use the centrifugal ore separator of higher rotation speed；It is described
The less centrifugal ore separator model SLON-1600 of centrifugal force, certainly, the less centrifugal ore separator of centrifugal force can also be adopted
With the centrifugal ore separator compared with the slow-speed of revolution.1 SLON-2400 types centrifugal ore separator and 1 SLON- are used under same treatment amount
The collocation of 1600 type centrifugal ore separators can reduce production cost, and thin mud tungsten essence compared to using 2 SLON-2400 types centrifuges
Ore deposit grade and the rate of recovery are close.After layering, same layer thin mud tungsten rough concentrate grade is more consistent, during centrifugal ore separator sorts
The centrifugal force difference that thin mud tungsten concentrate is obtained with mine tailing becomes apparent from, beneficial to separation.And compared with fine grain thin mud tungsten concentrate itself weight
Power is smaller, and the SLON-2400 types centrifugal ore separator is just enough to provide separating effect preferably required centrifugal force；And compared with coarse grain footpath
Thin mud tungsten concentrate self gravitation is larger, and it is preferably required that the SLON-1600 types centrifugal ore separator is just enough to provide separating effect
Centrifugal force.
Further, the black and white tungsten ore is divided into three grain-size grade method for distinguishing includes：By the black and white tungsten raw ore
Screen to obtain particle diameter through twice high frequency fine screen as the black and white tungsten ore of 0.20mm~0.50mm and particle diameter less than 0.20mm after stone rod milling
Stone, use cyclone to handle black and white tungsten ore of the particle diameter less than 0.20mm and obtain particle diameter as 0.04mm~0.20mm and particle diameter
Black and white tungsten ore less than 0.04mm.It is less than 0.04mm black and white tungsten ore using cyclone particle separation diameter, partition size is thin, divides
Stage efficiency is high, because the partition size lower limit of high frequency fine screen is 0.074mm, is less than 0.04mm according to high frequency fine screen screening granularity
Black and white tungsten ore when it is easily soaked, folder is thin, screening effect is undesirable.Due to the desilting more than 0.20mm and overflowing less than 0.20mm
It is 42.029 to flow ratio：57.971, desilting is few, and overflow is more, is difficult to according to traditional spiral classifier classification, is classified grain
Degree can not ensure.The present invention uses closed circuit classifying equipoment of the MICHAEL DRAKE high frequency fine screen as grinding circuit, and effectiveness of classification is better than spiral shell
Grader is revolved, and degree of grinding, the rate of recovery of tungsten mineral excessively that significantly reduce tungsten ore can improve 2%~5%.
Further, the tungsten rough concentrate II obtains as follows：Using described in first paragraph spiral chute gravity treatment
The black and white tungsten ore of 0.04mm~0.20mm particle diameters obtains rougher concentration, chats II and mine tailing II, the rougher concentration and described
Chats II obtains tungsten rough concentrate II through second segment spiral chute and table concentration respectively, and the chats II is through second segment spiral chute
The mine tailing of gravity treatment is mine tailing III.Increase second segment spiral chute can be further enriched with to black and white tungsten ore, and increase shaking table is to raw ore
Disposal ability.
Further, black and white tungsten ore of the particle diameter less than 0.04mm and the mine tailing II, the mine tailing III merge into tungsten
Thin mud, the tungsten slurry obtain thin mud tungsten concentrate after flotation, using centrifugal ore separator progress is selected.By above-mentioned mode,
Flotation is carried out again, improves the rate of recovery of tungsten concentrate, reduces the WO of mine tailing3Grade.Because tungsten slurry granularity is fine, returned using gravity treatment
Receipts are often difficult to obtain preferable separating effect.
Further, the black and white tungsten bulk flotation process is additionally added the carbonic acid that 800g/t~1000g/t is used to adjust pH
Sodium, 200g/t~500g/t are used for the waterglass for suppressing gangue mineral and 400g/t~500g/t is used for the plumbi nitras of activation.
800g/t~1000g/t sodium carbonate causes the pH of flotation adjusts can effectively to suppress in 8 or so, 200g/t~500g/t waterglass
Gangue mineral, 400g/t~500g/t plumbi nitras have significant activation.
Further, molybdenum rough concentrate is obtained through sulfide flotation after the rough concentrate I merges with rough concentrate II, floats the tail of molybdenum
Ore deposit obtains sulphide ore through floating sulphur, and described floating molybdenum and floating sulphur process use coarse flotation machine.Add sulphide ore and molybdenum rough concentrate
Recovery, improve mine resources utilization rate.Technique desulfurization is floated according to traditional table, its technological process is long and complex, and because
Sulfuric acid is added, equipment corrosion can be caused serious, inconvenience, and standby redundancy consumption are brought with execute-in-place to management
Greatly, cost is high, severe water pollution.And the comparatively ideal flotation particle size range of conventional flotation device is 0.01mm~0.20mm,
But the particle size range of rough concentrate I and rough concentrate II is generally higher than 0.20mm, conventional flotation device is not suitable for rough concentrate I and coarse-fine
The desulfurization process of ore deposit II and the processing of floating molybdenum, this problem is efficiently solved using coarse flotation machine.
Further, described tungsten concentrate obtains final tungsten concentrate and magnetic iron ore after low intensity magnetic separation.Magnetic iron ore is added to return
Receive, improve mine resources utilization rate, while improve tungsten concentrate grade.
Brief description of the drawings
Fig. 1 is the black and white tungsten ore method for separating schematic diagram of the embodiment of the present invention one；
Fig. 2 is the black and white tungsten ore method for separating schematic diagram of the embodiment of the present invention two；
Fig. 3 is floating-heavy combined sorting method schematic diagram of the tungsten slurry of the embodiment of the present invention one.
Embodiment
The present invention is described in further detail with reference to embodiments.
Embodiment one
It refer to Fig. 1, the WO of low-grade black and white tungsten ore3Grade majority is between 0.1%~0.3%, WO3Average grade is
0.233%, low-grade black and white tungsten ore method for separating of the invention includes broken black and white tungsten ore, grind grading, gravity treatment and flotation
Process, using crusher in crushing black and white tungsten ore tcrude ore, use bar grinding attachment and high frequency thin broken rear black and white tungsten ore tcrude ore
Sieve forms closed circuit grinding flow, and the black and white tungsten ore screened using first of high frequency fine screen after rod milling is obtained particle diameter and is less than 0.50mm
Black and white tungsten ore, particle diameter less than 0.50mm black and white tungsten ore after second high frequency fine screen, filter out particle diameter and be less than
0.20mm black and white tungsten ore, non-screened part particle diameter are 0.20mm~0.50mm black and white tungsten ore, and particle diameter is less than 0.20mm
Black and white tungsten ore by hydroclone classification handle, overflow portion be particle diameter be less than 0.04mm black and white tungsten ore, desilting
Part is the black and white tungsten ore of 0.04~0.20mm particle diameters.The hydrocyclone model FX250-GK, its is a diameter of
250mm, give ore deposit house steward a diameter of 350mm, a diameter of 350mm of desilting house steward.Cyclone partition size is thin, fine grading efficiency
Height, simple structure, floor space is small, easy-maintaining, and disposal ability is big.
The black and white tungsten ore that described particle diameter is 0.20mm~0.50mm obtains roughing essence after spiral concentrator roughing
Ore deposit and rougher tailings, the rougher concentration obtain tungsten rough concentrate I, chats I and mine tailing by first paragraph table concentration, and chats I passes through
Second segment shaking table final election obtains tungsten rough concentrate I, final election chats I, mine tailing.The spiral concentrator uses GL spiral concentrators, institute
The disposal ability that GL spiral concentrators are stated to coarse fraction black and white tungsten ore is strong.The final election chats I is returned at raw ore ore grinding, again
Sorting process, improve tungsten recovery rate.
The particle diameter be 0.04mm~0.02mm black and white tungsten ore after first paragraph spiral chute roughing, obtain roughing
Concentrate, chats II, mine tailing II, described rougher concentration obtain final election concentrate and mine tailing, institute by second segment spiral chute final election
State final election concentrate and obtain tungsten rough concentrate II and mine tailing through first paragraph shaking table and second segment table concentration, the chats II is through second segment
Spiral chute final election obtains final election concentrate, mine tailing III, and the final election concentrate obtains through first paragraph shaking table and second segment table concentration
Tungsten rough concentrate II and mine tailing.Described chats II and the shaking table mine tailing is concentrated and floating molybdenum after obtain molybdenum rough concentrate.Described
At middling recurrence raw ore ore grinding after two sections of shaking table final elections, sorting process, improves tungsten recovery rate again.Spiral chute is to fine fraction
The disposal ability of black and white tungsten ore is strong, spiral chute preconcentration fine fraction black and white tungsten ore, so as to increase place of the shaking table to raw ore
Reason ability.
Described tungsten rough concentrate I and tungsten rough concentrate II merges into tungsten rough concentrate, in the WO of black and white tungsten ore raw ore3Average grade
For 0.219% when, by obtaining WO after classification gravity concentration3Average grade is 11.25% gravity treatment tungsten rough concentrate, relative to raw ore
The rate of recovery reaches 73.84%.
Molybdenum rough concentrate is obtained using tungsten rough concentrate described in coarse flotation machine flotation, the mine tailing after floating molybdenum is floated with coarse flotation machine
Sulphide ore is selected, final tungsten rough concentrate is obtained after floating sulphur.Particle diameter is 0.20mm~0.5mm and 0.04mm~0.2mm black and white tungsten ore
After the gravity tailings of stone is concentrated, molybdenum rough concentrate is obtained using coarse flotation machine flotation.Molybdenum recovery is added, improves mine money
Source utilization rate.
Black and white tungsten ore of the particle diameter less than 0.04mm merges into black and white tungsten fine with the mine tailing II, the mine tailing III
Mud, the tungsten slurry yield are 19.511%, wherein WO3Average grade is 0.135%, and the average grade of molybdenum is 0.039%, right
Raw ore tungsten, molybdenum occupation rate are respectively 15.02% and 40.47%.
Such as Fig. 3, the black and white tungsten fine mud sorts mode in combination using flotation and gravity treatment, and the black and white tungsten fine mud passes through water
Power cyclone, which is sloughed, is less than 0.010mm sludges in ore pulp, obtain the black and white tungsten fine mud of pulp density more than 35%, adds 90g/t
The 2# oil stirrings of~100g/t xanthate, 700g/t~900g/t sodium carbonate and 30g/t~40g/t, using jet flotation machine
Desulfurization roughing is carried out, sulfide is carried out after desulfurization roughing and is scanned, desulfurization is obtained and scans mine tailing, mine tailing addition is scanned in the desulfurization
800g/t~1000g/t pH adjusting agents sodium carbonate and 200g/t~500g/t inhibitor waterglass stir 2~9 minutes, addition
400g/t~500g/t activators plumbi nitras stirs 2~9 minutes, adds collecting agent benzyl hydroximic acid, the oil of dosage as described in Table 1
Sour sodium and xanthate stir 2~9 minutes, addition 40g/t~60g/t foaming agents 2# oil stirring 2~9 minutes, using jet flotation machine
Carry out black and white tungsten mixing one roughing, primary cleaning.The roughing and cleaner tailings are scanned twice, and the first time scans
Pharmaceutical quantities be half of black and white tungsten mixing roughing institute dosage or so, the pharmaceutical quantities scanned for the second time are that black and white tungsten mixes
Close 1/3rd or so of roughing institute dosage.
The comparative example 1~3 of test example 1~6 of the present invention addition as the dosage of table 1 the black and white tungsten bulk flotation collecting agent and
1000g/t sodium carbonate, 500g/t waterglass, 450g/t plumbi nitras, 50g/t 2# oil, carry out the thick of the black and white tungsten bulk flotation
Choosing and selected, the pharmaceutical quantities that the first time scans are half of black and white tungsten mixing roughing institute dosage or so, described second
The secondary pharmaceutical quantities scanned are 1/3rd or so of black and white tungsten mixing roughing institute dosage.
The collector dosage and its experimental result of the test example of table 1 and comparative example
Thin mud tungsten rough concentrate described in natural subsidence, at the larger centrifugal ore separator of upper strata thin mud tungsten rough concentrate centrifugal force
Reason, the less centrifugal ore separator processing of lower floor's thin mud tungsten rough concentrate centrifugal force, the larger centrifugal ore separator of the centrifugal force are adopted
With SLON-2400 type centrifugal ore separators, the less centrifugal ore separator of centrifugal force uses SLON-1600 type centrifugal ore separators.
After being sorted using the centrifugal ore separator and SLON-1600 type centrifugal ore separator point size fractionateds of SLON-2400 type centrifugal force, mine tailing
Middle WO3Average grade drops to less than 0.04%.The centrifugal ore separator and SLON-1600 of gradation level SLON-2400 type centrifugal force
It is 82.33% more than or equal to the other thin mud tungsten concentrate rate of recovery of 0.074mm grain-size grades after type centrifugal ore separator is selected,
The other thin mud tungsten concentrate rate of recovery of 0.038mm~0.074mm grain-size grades is 87.17%, 0.020mm~0.038mm particle diameter ranks
The thin mud tungsten concentrate rate of recovery be 88.25%, less than 0.020mm grades the thin mud tungsten concentrate rate of recovery be 71.84%.Centrifugation choosing
After ore deposit machine sorts, by the concentration of thin mud tungsten concentrate, press filtration, drying, final thin mud tungsten concentrate is obtained.
The WO in raw ore3When average grade is 0.219%, WO is obtained by classification gravity concentration3Average grade is 11.25%
Gravity treatment tungsten rough concentrate, reach 73.84% relative to the rate of recovery of raw ore, be selected in WO in tungsten slurry3Average grade is 0.157%
Under part, through floating-heavy combined sorting of tungsten slurry, WO can be obtained3The thin mud tungsten concentrate of average grade 21.59%, the thin mud tungsten essence
Ore deposit is 11.32% relative to the rate of recovery of raw ore, and tungsten concentrate overall recovery can reach 85.16%.
Embodiment two
As shown in Fig. 2 embodiment two and the difference of the low-grade black and white tungsten method for separating of embodiment one are also to wrap
Include and secondary grading gravity treatment is carried out to the final tungsten rough concentrate.The tungsten rough concentrate is divided into particle diameter through hydraulic classiciation case and is more than
0.20mm, particle diameter are more than or equal to 0.10mm and are less than tri- particle diameter grades of 0.10mm less than 0.20mm, particle diameter.
Tungsten rough concentrate of the particle diameter more than or equal to 0.20mm obtains tungsten concentrate and mine tailing, the mine tailing warp after table concentration
After spiral dehydration, ball-milling treatment obtains the tungsten ore that particle diameter is less than 0.20mm, and the tungsten ore obtains after table concentration is handled again
To tungsten concentrate, because particle diameter is higher more than 0.20mm mine tailing average grade of the tungsten rough concentrate through table concentration, containing it is many not
The intergrowth of abundant monomer dissociation, sorted again so increase ball milling carries out ore grinding to Reefing mine tailing, reduce metal loss, enter one
Step lifting tungsten metal recovery；Particle diameter is that 0.10mm~0.20mm tungsten rough concentrate obtains tungsten concentrate, particle diameter after table concentration
Tungsten rough concentrate less than 0.10mm first passes through dense bucket desliming dehydration, then obtains tungsten concentrate using shaking table progress is selected.Described three
The individual other tungsten rough concentrate of grain-size grade mine tailing after table concentration returns to sorting process again at raw ore ore grinding, improves tungsten recovery rate.
Tungsten concentrate of the three particle diameters rank tungsten rough concentrate after table concentration through low intensity magnetic separation obtain final tungsten concentrate with
And magnetic iron ore, the WO of described final tungsten concentrate3Average grade is 53.49%, and tungsten concentrate average recovery rate reaches 68.50%,
And floating-heavy combined sorting of black and white tungsten fine mud, WO can be obtained3The thin mud tungsten concentrate of average grade 21.59%, the thin mud tungsten concentrate
It is 11.32% relative to the rate of recovery of raw ore, the overall recovery of tungsten concentrate can reach 79.82%.
Comparative example one
It is described compare example one and embodiment one difference be, feelings of the flotation thin mud tungsten rough concentrate in not stratified processing
Under condition, selected processing is done using the less centrifugal ore separator SLON-1600 of centrifugal force, the tungsten slurry passes through flotation and centrifugal force
After less centrifugal ore separator SLON-1600 gravity treatments, it is more than the other thin mud tungsten concentrate rate of recovery of 0.074mm grain-size grades
The other thin mud tungsten concentrate rate of recovery of 77.92%, 0.038mm~0.074mm grain-size grades is 84.80%, 0.020mm~0.038mm
The other thin mud tungsten concentrate rate of recovery of grain-size grade is 63.58%, is less than the other thin mud tungsten concentrate rate of recovery of 0.020mm grain-size grades
47.66%.After centrifugal ore separator sorts, by the concentration of thin mud tungsten concentrate, press filtration, drying, final thin mud tungsten concentrate is obtained.
Above-described embodiment only be used for further illustrate the present invention several specific embodiments, but the invention is not limited in
Embodiment, any simple modification, equivalent change and modification that every technical spirit according to the present invention is made to above example,
Each fall within the protection domain of technical solution of the present invention.
Claims (7)
1. a kind of method for separating of low-grade black and white tungsten ore, it is characterised in that the method for separating includes：
Particle diameter is thick with obtaining tungsten after table concentration by spiral concentrator roughing for 0.20mm~0.50mm black and white tungsten ore
Concentrate I；Particle diameter is thick with obtaining tungsten after table concentration by spiral chute roughing for 0.04mm~0.20mm black and white tungsten ore
Concentrate II；Black and white tungsten ore of the particle diameter less than 0.04mm is obtained into floating sulphur mine tailing by sulfide flotation, the floating sulphur mine tailing leads to
Cross black and white tungsten bulk flotation and obtain thin mud tungsten rough concentrate, the collecting agent of the black and white tungsten bulk flotation includes 60g/t~120g/t
Xanthate, 400g/t~600g/t benzyl hydroximic acids and 30g/t~50g/t enuatrols, the black and white tungsten bulk flotation process also add
Enter 800g/t~1000g/t is used to adjusting pH sodium carbonate, 200g/t~500g/t is used to suppressing gangue mineral waterglass and
400g/t~500g/t is used for the plumbi nitras activated, and selected obtain carefully is carried out to the thin mud tungsten rough concentrate using centrifugal ore separator
Mud tungsten concentrate.
2. the method for separating of black and white tungsten ore according to claim 1, it is characterised in that also comprise the following steps：Using water
Power be classified case the tungsten rough concentrate I and the tungsten rough concentrate II are divided into more than 0.20mm, 0.10mm~0.20mm by particle diameter and
Less than tri- particle diameter ranks of 0.10mm, tungsten rough concentrate described in each particle diameter rank uses corresponding shaking table roughing and corresponding shaking table
Tungsten concentrate is obtained after final election.
3. the method for separating of black and white tungsten ore according to claim 1, it is characterised in that described in the thin mud tungsten rough concentrate is used
The selected step of centrifugal ore separator includes：Thin mud tungsten rough concentrate described in layered shaping, upper strata thin mud tungsten rough concentrate use centrifugal force
Larger centrifugal ore separator is selected to obtain thin mud tungsten concentrate, and lower floor's thin mud tungsten rough concentrate uses the less centrifugal separation of centrifugal force
Machine is selected to obtain thin mud tungsten concentrate.
4. the method for separating of black and white tungsten ore according to claim 1, it is characterised in that the black and white tungsten ore is divided into three
Individual grain-size grade method for distinguishing includes：To screen to obtain particle diameter through twice high frequency fine screen after the black and white tungsten tcrude ore rod milling be
0.20mm~0.50mm and particle diameter are less than 0.20mm black and white tungsten ore, and the particle diameter is handled less than 0.20mm's using cyclone
Black and white tungsten ore obtains the black and white tungsten ore that particle diameter is less than 0.04mm for 0.04mm~0.20mm and particle diameter.
5. the method for separating of black and white tungsten ore according to claim 1, it is characterised in that the tungsten rough concentrate II is by as follows
Step obtains：Roughing essence is obtained using the black and white tungsten ore of 0.04mm~0.20mm particle diameters described in first paragraph spiral chute gravity treatment
Ore deposit, chats II and mine tailing II, the rougher concentration and the chats II obtain through second segment spiral chute and table concentration respectively
Tungsten rough concentrate II, mine tailing of the chats II through second segment spiral chute gravity treatment are mine tailing III.
6. the method for separating of black and white tungsten ore according to claim 5, it is characterised in that the particle diameter is black less than 0.04mm's
Scheelite and the mine tailing II, the mine tailing III merge into tungsten slurry, and the tungsten slurry is entered after flotation using centrifugal ore separator
Row is selected to obtain thin mud tungsten concentrate.
7. the method for separating of black and white tungsten ore according to claim 1, it is characterised in that the rough concentrate I and rough concentrate II
Molybdenum rough concentrate is obtained through sulfide flotation after merging, the mine tailing of floating molybdenum obtains sulphide ore, described floating molybdenum and floating sulphur mistake through floating sulphur
Cheng Caiyong coarse flotation machines.
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| CN110614166A (en) * | 2019-08-23 | 2019-12-27 | 湖南柿竹园有色金属有限责任公司 | Flotation method for improving tungsten recovery rate |
| CN111229449B (en) * | 2020-02-26 | 2021-11-09 | 赣州有色冶金研究所有限公司 | Tungsten ore sorting method |
| CN111715399B (en) * | 2020-06-28 | 2021-12-24 | 广东省科学院资源利用与稀土开发研究所 | Pretreatment method of high-calcium high-magnesium fine-particle embedded scheelite |
| CN112657670B (en) * | 2020-12-04 | 2022-04-01 | 东北大学 | Beneficiation method for recovering polymetallic from gold-containing gravity separation tailings |
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