CN101869876B - Ore dressing method of low-grade scheelite - Google Patents
Ore dressing method of low-grade scheelite Download PDFInfo
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- CN101869876B CN101869876B CN201010187491A CN201010187491A CN101869876B CN 101869876 B CN101869876 B CN 101869876B CN 201010187491 A CN201010187491 A CN 201010187491A CN 201010187491 A CN201010187491 A CN 201010187491A CN 101869876 B CN101869876 B CN 101869876B
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Abstract
The invention relates to an ore dressing method of a low-grade scheelite, which is characterized by comprising the following steps: 1. tailing discard by gravity concentration; 2. iron removal by magnetic separation; 3. sulfide ore flotation; 4. normal-temperature rougher flotation of scheelite; and 5. heating concentration of the scheelite. The invention provides a lower-cost ore dressing method for dressing scheelite concentrates from the tailings of the low-grade scheelite. The invention has the characteristics that the comprehensive recovery cost is saved, the beneficiation feed grade of the scheelite is improved, the flotation feed ore quantity is reduced, the dosage of a flotation reagent is reduced, the used ore dressing reagent is more friendly to the environment, and secondary pollution can not be caused. The method of the invention is applicable for low-grade scheelite resources with 0.03 to 0.15 percent of WO3.
Description
Technical field
The present invention relates to a kind of beneficiation method, particularly a kind of beneficiation method of low-grade scheelite.
Background technology
China produces tungsten big country, and 5,200,000 tons of tungsten resource reserves are 30 and produce more than 3 times of tungsten country's gross reserves (1,300,000 tons), and output and export volume all rank first in the world.Because historical reasons and technical merit restriction, the utilization rate of scheelite resource is less than 50%, and a large amount of scheelites are lost in the mine tailing.Along with the continuous exploitation on tungstenic polymetallic ore mountain, the tailing heap storage is more and more big, has not only taken a large amount of soils, has also polluted environment.Therefore, the recovery low-grade scheelite is significant from mine tailing.Usually, give ore deposit grade WO
3＞0.15% scheelite adopts conventional method for floating also can obtain economic benefit; WO
3＜0.15% low-grade scheelite, ton concentrate production cost is higher relatively to adopt single beneficiation method.In order to make full use of low grade white tungsten ore resources in the mine tailing, be badly in need of a kind of lower-cost beneficiation method of from the mine tailing of low-grade scheelite, choosing the scheelite concentrate.
Chinese patent numbers 200410051961.1 discloses a kind of beneficiation method of black and white tungsten mineral.This method is to contain WO usually
30.2～2.0%, black and white tungsten ratio is behind 1: 9～9: 1 the crushing raw ore ore grinding; After low intensity magnetic separation removes iron mineral and sulfide flotation and deviates from sulfide mineral; Mine tailing is after waterglass, aluminum sulfate, plumbi nitras are sized mixing; Add collecting agent benzene first hydroximic acid, sulphation oleic acid soap or tal fibre soap and kerosene, carry out the bulk flotation of black and white tungsten and obtain WO
320～50% black and white tungsten bulk concentrate.The weak point of this technical scheme is that plumbi nitras, benzene first hydroximic acid cost are higher, and certain toxicity is arranged.
One Chinese patent application numbers 200810027873.6 discloses a kind of beneficiation method of black and white tungsten fine mud.This method is to containing WO
3Content 0.10～0.50%, less than the WO of 30 microns grades
3The black and white tungsten fine mud of metal occupation rate≤60% adds adjustment agent sodium carbonate, waterglass, aluminum sulfate, plumbi nitras in its mine tailing after tail, sulfide flotation are thrown in gravity treatment, add collecting agent sulphation oleic acid soap, obtains to contain WO
38～20% black and white tungsten bulk flotation concentrate.The weak point of this technical scheme is that equally also the plumbi nitras cost is higher, and certain toxicity is arranged.
One Chinese patent application numbers 200810027874.0 discloses a kind of beneficiation method that from the tungsten ore that is rich in mispickel, reclaims scheelite.This method is with the tungsten ore crushing raw ore, ore grinding, and flotation obtains to contain sulphide ore and the sulfide flotation mine tailing that mispickel is the master; The sulfide flotation mine tailing is with sodium carbonate, waterglass, and collecting agent sulphation oleic acid soap is added in the back of sizing mixing, and stirs, and is selected through roughly selecting, and scans, and obtains white tungsten rough concentrate and white tungsten rougher tailings.Can obtain the rate of recovery and be 80～90% and contain WO
34～10% white tungsten rough concentrate.The weak point of this technical scheme is that equally also the reagent cost of sulphation oleic acid soap is higher.
Summary of the invention
The object of the invention provides a kind of lower-cost beneficiation method of from the mine tailing of low-grade scheelite, choosing the scheelite concentrate.
The present invention realizes through following technical scheme: 1) tail is thrown in gravity treatment: the low-grade scheelite mine tailing behind slag, obtains gravity concentrate and gravity tailings through screening; 2) iron removal by magnetic separation: gravity concentrate obtains iron selection tailings and iron ore concentrate under 1000～3000Gs magnetic induction intensity; 3) sulfide flotation: calculate to the ore deposit by mine tailing per ton, in iron selection tailings, add adjustment agent sodium carbonate 500～1500 grams, stirred 1～5 minute; Collecting agent butyl xanthate 50～150 grams, 2# oil 5～30 grams stirred 1～5 minute, did and roughly selected for 1 time, scan for 1～2 time, obtained floating sulphur mine tailing and sulphide ore; 4) white tungsten normal temperature is roughly selected: calculate to the ore deposit by mine tailing per ton, in floating sulphur mine tailing, add adjustment agent sodium carbonate 500～1500 grams, waterglass 500～5000 grams stirred 1～10 minute; Collecting agent enuatrol 100～500 gram stirred 1～10 minute, do roughly select for 1 time, scan for 2～3 times, 2～3 times selected, obtain white tungsten rough concentrate and floating tungsten mine tailing; 5) white tungsten is heated selected: white tungsten rough concentrate is concentrated into 60～80% concentration; Calculate to the ore deposit by mine tailing per ton; Add waterglass 200～2000 grams; Heat to 80～100 ℃ of insulations and stirred 30～120 minutes, flotation obtains the white tungsten fine ore and the cleaner tailings of heating, and the cleaner tailings of heating is back to white tungsten normal temperature and roughly selects operation.To contain white tungsten WO to the ore deposit
30.03～0.15% mine tailing is finally obtained white tungsten fine ore grade WO
335～55%, the rate of recovery 50～65%.
The process object that the present invention is directed to is the mine tailing from polymetallic ore mountain tailings reservoir for piling; Wherein contain low-grade tungsten; Tungsten mainly exists with the scheelite mineral forms; Also contain magnetic iron ore, pyrite in addition, gangue mineral is quartz, fluorite, calcite, sericite, chlorite, is magnetic iron ore, garnet, diopside etc. secondly.
This technical scheme has following characteristics: 1) gravity treatment 60～70% interfering mud and the light minerals of having thrown tail drop, and make low-grade scheelite obtain enrichment, this operation is most important to the sorting index that improves scheelite; 2) sort before iron removal by magnetic separation in advance at white tungsten, significantly reduce iron content in tungsten concentrate, this operation is very crucial to the quality that improves tungsten concentrate; 3) regime of agent is simple, nontoxic, and the collecting agent enuatrol is more cheap, for reduction beneficiation cost, minimizing environmental pollution provide effective way.Compare with conventional beneficiation method, improve the selected grade of scheelite, reduce flotation and go into ore dressing amount 60～70%, reduce floating agent consumption and cost, for the utilization of low-grade scheelite resource exploitation provides new way.
Description of drawings
Fig. 1 is the flow chart of beneficiation method of the present invention.
The specific embodiment
The regime of agent of the sulfide flotation of embodiment 1～3 is seen table 1, and white tungsten normal temperature is roughly selected and white tungsten is heated, and selected regime of agent is seen table 2.
The regime of agent of the sulfide flotation of table 1 embodiment 1～3
Annotate: sulphide ore is roughly selected adjustment agent sodium carbonate and was stirred 5 minutes, and butyl xanthate, 2# oil stirred 3 minutes; Scanning butyl xanthate, 2# oil stirs and is 3 minutes.
The white tungsten normal temperature of table 2 embodiment 1～3 is roughly selected and the white tungsten selected regime of agent of heating
Annotate: tungsten is roughly selected adjustment agent sodium carbonate, waterglass stirred 5 minutes, and enuatrol stirred 3 minutes; Scan the enuatrol stirring and be 3 minutes; Selected waterglass stirs and is 3 minutes.
Embodiment 1
Low-grade (WO in the flotation tailing of lindgernite mountain, Guangdong
30.063%) scheelite, granularmetric composition-0.074mm accounts for 75%, be fit to adopt gravity treatment to throw tail, and the white tungsten rough concentrate of gravity treatment removes and carries out white tungsten normal temperature behind magnetic iron ore and the sulfide mineral again and roughly select and heat selected with white tungsten.
Tail is thrown in gravity treatment: adopt spiral concentrator conduct-1.0mm grade material gravitational separation equipment, and the mine tailing of gravity treatment jettisoning 64.69%, the gravity concentrate grade is brought up to WO
30.14%, the rate of recovery 79.26%.
Iron removal by magnetic separation: deironing under magnetic induction intensity 2000Gs.
Sulfide flotation: by the listed dosing of table 1 iron selection tailings is carried out sulfide flotation, obtain the sulfide flotation concentrate and tailings.
White tungsten normal temperature is roughly selected: by the listed dosing of table 2 floating sulphur mine tailing is carried out, flow process be roughly select for 1 time, scan for 2 times, 2 times selected, obtain white tungsten rough concentrate.
White tungsten is heated selected: white tungsten rough concentrate is concentrated into 75%, heats to 90 ℃, stirs 60 minutes.Add the flotation of heating by dosing shown in the table 2 and obtain white tungsten fine ore.White tungsten fine ore grade WO
351.02%, the relative lindgernite mountain flotation tailing rate of recovery 56.72%.The result of embodiment 1 sees table 3.
The result of table 3 embodiment 1
Embodiment 2
Low-grade (WO in the molybdenum copper tungsten ore mine tailing of Yunnan
30.092%) scheelite resource, main tungsten mineral is a scheelite.Sulfide minerals such as minute quantity pyrite, chalcopyrite, galena.Other gangue mineral is mainly muscovite, calcite etc.Mine tailing granularmetric composition-0.074mm accounts for 70%.Be fit to adopt gravity treatment to throw tail, the white tungsten rough concentrate of gravity treatment removes and carries out white tungsten normal temperature behind magnetic iron ore and the sulfide mineral again and roughly select and heat selected with white tungsten.
Tail is thrown in gravity treatment: adopt spiral concentrator conduct-1.0mm grade material gravitational separation equipment, and the mine tailing of gravity treatment jettisoning 68.54%, the gravity concentrate grade is brought up to WO
30.25%, the rate of recovery 84.50%.
Iron removal by magnetic separation: deironing under magnetic induction intensity 3000Gs.
Sulfide flotation: by the listed dosing of table 1 iron selection tailings is carried out sulfide flotation, obtain the sulfide flotation concentrate and tailings.
White tungsten normal temperature is roughly selected: by the listed dosing of table 2 floating sulphur mine tailing is carried out, flow process be roughly select for 1 time, scan for 2 times, 2 times selected, obtain white tungsten rough concentrate.
White tungsten is heated selected: white tungsten rough concentrate is concentrated into 80%, heats to 90 ℃, stirs 60 minutes.Add the flotation of heating by dosing shown in the table 2 and obtain white tungsten fine ore.White tungsten fine ore grade WO
344.56%, the relative lindgernite mountain flotation tailing rate of recovery 62.81%.The result of embodiment 2 sees table 4.
The result of table 4 embodiment 2
Embodiment 3
Low-grade (WO in the tabular copper of Gansu skarn type, bismuth, molybdenum, sulphur, the tungsten ore mine tailing
30.14%) scheelite resource, scheelite are the main valuable minerals that reclaims in the mine tailing.Mine tailing granularmetric composition-0.074mm accounts for 80%.Be fit to adopt gravity treatment to throw tail, the white tungsten rough concentrate of gravity treatment removes and carries out white tungsten normal temperature behind magnetic iron ore and the sulfide mineral again and roughly select and heat selected with white tungsten.
Tail is thrown in gravity treatment: adopt spiral concentrator conduct-1.0mm grade material gravitational separation equipment, and the mine tailing of gravity treatment jettisoning 60.78%, the gravity concentrate grade is brought up to WO
30.27%, the rate of recovery 71.93%.
Iron removal by magnetic separation: deironing under magnetic induction intensity 1000Gs.
Sulfide flotation: by the listed dosing of table 1 iron selection tailings is carried out sulfide flotation, obtain the sulfide flotation concentrate and tailings.
White tungsten normal temperature is roughly selected: by the listed dosing of table 2 floating sulphur mine tailing is carried out, flow process be roughly select for 1 time, scan for 2 times, 2 times selected, obtain white tungsten rough concentrate.
White tungsten is heated selected: white tungsten rough concentrate is concentrated into 80%, heats to 95 ℃, stirs 60 minutes.Add the flotation of heating by dosing shown in the table 2 and obtain white tungsten fine ore.White tungsten fine ore grade WO
354.16%, the relative lindgernite mountain flotation tailing rate of recovery 50.99%.The result of embodiment 3 sees table 5.
The result of table 5 embodiment 3
Claims (1)
1. the beneficiation method of a low-grade scheelite is characterized in that being made up of following steps: 1) gravity treatment throwing tail: behind the separated slag of low-grade scheelite mine tailing process screening, obtain gravity concentrate and gravity tailings; 2) iron removal by magnetic separation: gravity concentrate obtains iron selection tailings and iron ore concentrate under 1000～3000Gs magnetic induction intensity; 3) sulfide flotation: calculate to the ore deposit by mine tailing per ton, in iron selection tailings, add adjustment agent sodium carbonate 500～1500 grams, stirred 1～5 minute; Collecting agent butyl xanthate 50～150 grams, 2# oil 5～30 grams stirred 1～5 minute, did and roughly selected for 1 time, scan for 1～2 time, obtained floating sulphur mine tailing and sulphide ore; 4) white tungsten normal temperature is roughly selected: calculate to the ore deposit by mine tailing per ton, in floating sulphur mine tailing, add adjustment agent sodium carbonate 500～1500 grams, waterglass 500～5000 grams stirred 1～10 minute; Collecting agent enuatrol 100～500 gram stirred 1～10 minute, do roughly select for 1 time, scan for 2～3 times, 2～3 times selected, obtain white tungsten rough concentrate and floating tungsten mine tailing; 5) white tungsten is heated selected: white tungsten rough concentrate is concentrated into 60～80% concentration; Calculate to the ore deposit by mine tailing per ton; Add waterglass 200～2000 grams; Heat to 80～100 ℃ of insulations and stirred 30～120 minutes, flotation obtains the white tungsten fine ore and the cleaner tailings of heating, and the cleaner tailings of heating is back to white tungsten normal temperature and roughly selects.
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| CN107716121B (en) * | 2017-09-29 | 2019-07-23 | 江西理工大学 | Application of the hydroxypropyl starch ether in Scheelite Flotation |
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