CN104084315B - Beneficiation method for separating fluorite and tungsten through flotation - Google Patents

Beneficiation method for separating fluorite and tungsten through flotation Download PDF

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CN104084315B
CN104084315B CN201410326910.9A CN201410326910A CN104084315B CN 104084315 B CN104084315 B CN 104084315B CN 201410326910 A CN201410326910 A CN 201410326910A CN 104084315 B CN104084315 B CN 104084315B
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ton
grams
tungsten
fluorite
flotation
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CN104084315A (en
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朱一民
李晓东
周菁
陈玉林
潘高产
谢加文
周燕红
张适合
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Hunan Research Institute of Non Ferrous Metals
Hunan Shizhuyuan Nonferrous Metals Co Ltd
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Hunan Research Institute of Non Ferrous Metals
Hunan Shizhuyuan Nonferrous Metals Co Ltd
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Abstract

The invention discloses a beneficiation method for separating fluorite, white tungsten (black tungsten) and gangue minerals in complex polymetallic ore through flotation. Non-magnetic products of tailings subjected to sulphide ore flotation or tailings subjected to sulphide ore flotation and then subjected to strong magnetic separation for recycling black tungsten serve as two kinds of samples. The pH value is controlled by adding regulators, white tungsten, black tungsten, other gangue combined inhibitors and collectors are added, fluorite is subjected to differential flotation, then, tungsten minerals are subjected to flotation, and therefore fluorite and tungsten can be efficiently recycled. Loss of fluorite in tungsten flotation concentrate is avoided when tungsten minerals are subjected to differential flotation, and the defect that when tungsten flotation is performed, fluorite is difficult to recycle through flotation because the inhibitors have strong inhibition on fluorite, and beneficiation efficiency is low is avoided. Compared with a current beneficiation situation, the fluorite recycling rates of tests on the two different samples are increased by 39% to 48 % and 9% respectively, and the tungsten recycling efficiency is improved by 3%.

Description

The beneficiation method of a kind of fluorite and tungsten FLOTATION SEPARATION
Technical field
The invention belongs to technical field of mineral processing, particularly relate to a kind of separation synthetical recovery beneficiation method containing the calcic gangue mineral such as fluorite, white tungsten, calcite, garnet in the complex multi-metal ores such as tungsten, molybdenum, bismuth, fluorite, calcite, garnet.
Background technology
Fluorite and scheelite have similar surface electrical behavior and flotation behavior, therefore the FLOTATION SEPARATION between them is very difficult, and owing to also containing the calcic gangue minerals such as calcite in complex multi-metal ore, therefore fluorite and the calcic such as tungsten and calcite gangue mineral FLOTATION SEPARATION then more difficult, its isolation technics is still the bottleneck of restriction fluorite and scheelite high efficiente callback so far, is one of mineral manufacture field global problem.In the past in the ore dressing remanufacture containing fluorite and scheelite mineral and scientific research, ripe ore-dressing technique is after completing sulfide flotation, the floating direct or floating sulphur mine tailing of sulphur mine tailing suppresses fluorite diffeential floatation scheelite after high intensity magnetic separation, then fluorite is reclaimed in flotation from floating Tungsten tailing.The separation method of main employing is high alkaline process, namely adds NaOH, lime, waterglass etc. in a large number by ore pulp regulable control pH value >=12, and diffeential floatation scheelite suppresses fluorite, then fluorite ore is reclaimed in flotation from floating Tungsten tailing; In recent years new research is also had to adopt ore-dressing technique to be: floating sulphur mine tailing carries out tungsten and fluorite bulk flotation, and bulk concentrate carries out fluorite and tungsten separating flotation again.Fluorite is separated with black and white tungsten ore and also there is same problem, in the scientific research of decades, fluorite and black tungsten, scheelite technique of preparing achieve very large breakthrough, under low alkali condition, suppress fluorite to reclaim black and white tungsten ore, the rate of recovery of tungsten is greatly improved, but owing to the addition of a large amount of waterglass, still there is the problem that the repressed fluorite rate of recovery is low.
There is following technological deficiency in the white tungsten of prior art and fluorite separation and recovery:
1) at high alkalinity pH value and diffeential floatation scheelite under adding a large amount of waterglass condition, fluorite is strongly inhibited, and the exception that follow-up fluorite is become is difficult; In the process of the tungsten of diffeential floatation simultaneously, the good fluorite of a part of floatability is lost when tungsten flotation, and the recovery rate in ore-dressing of fluorite is difficult to improve.
2) when floating Tungsten tailing carries out fluorite, add a large amount of acid and activator, adjustment slurry pH, also makes a part of gangue mineral be activated when activating repressed fluorite mineral, fluorite difficult quality is improved.
3) processing of fluorspar ores technological process is complicated, carry out repeatedly selected, also or concentrate regrinding will be needed to ensure fluorite concentrate grade at refining process secondary emission mine tailing, and produced on-site ore dressing control difficulty is large, poor stability.
4) tungsten and fluorite bulk flotation is adopted, the complex process such as bulk concentrate separating flotation-regrinding and reconcentration-acidleach-tungsten gravity treatment recovery.
5) prior art black and white tungsten is separated with fluorite, with the addition of a large amount of waterglass when the bulk flotation of black and white tungsten, there is the problem that the suppressed rear flotation recovery rate of fluorite is low equally.
Experienced by the scientific research of decades, the high efficient separation technology of fluorite and tungsten obtains very large progress, prior art is still hovered between 26% ~ 35% to raw ore Fluorite recovery rate containing adopting in the actual production of high alkaline process processing of fluorspar ores in W, mo, bi fluorite complex multi-metal ore, and fluorite concentrate grade is 80 ~ 93%; The white tungsten flotation rough concentrate rate of recovery is 70%.Flotation rough concentrate tungsten recovery rate 80% when adopting low alkaline process diffeential floatation black and white tungsten; Fluorite operation recovery 50%, to the raw ore rate of recovery about 47%.
Summary of the invention
The present invention is intended to overcome the deficiencies in the prior art, provides the beneficiation method of a kind of fluorite and tungsten FLOTATION SEPARATION.
In order to achieve the above object, technical scheme provided by the invention is:
The beneficiation method of described fluorite and tungsten FLOTATION SEPARATION comprises the steps:
(1) using in raw ore containing the mine tailing after the polymetallic ore Flotation of Sulfide Ores such as tungsten, molybdenum, bismuth, fluorite, calcite, garnet or the non-magnetic product of Flotation of Sulfide Ores mine tailing after high intensity magnetic separation as giving ore deposit, send in agitator, and add pH adjusting agent, composite restrainer, collecting agent to giving in ore deposit, flotation fluorite in flotation device is sent into after stirring, suppress tungsten and gangue mineral, under faintly acid or neutrallty condition, through one roughing, once purging selection, selected at least one times after, gained flotation froth is fluorite concentrate product;
(2) in the product being at the bottom of tail-box after step (1) flotation fluorite, adjusting agent, composite restrainer, combination activator, collecting agent is added, roughing flotation scheelite or Scheelite-Wolframite Mixed Mine under weak basic condition, controlling tungsten flotation pulp pH value is 8 ~ 9, through one roughing, scan for three times, triple cleaning obtains tungsten rough concentrate; Selected chats, scavenger concentrate respectively order return;
Wherein, described in step (1), pH adjusting agent is sulfuric acid or hydrochloric acid, and adjusting to ore deposit pH is 6 ~ 7; Described composite restrainer is the mixture of starch and waterglass, or the mixture of starch and acidic water glass, or the mixture of CMC carboxy methyl cellulose and waterglass, or the mixture of CMC carboxy methyl cellulose and acidic water glass; The addition of starch or CMC carboxy methyl cellulose is 200 ~ 1500 grams/ton, the addition of waterglass or acidic water glass is 200 ~ 1800 grams/ton; Described collecting agent is one or both in oleic acid, modification oleic acid, 731 or 733 oxidized paraffin wax soaps, lauryl sodium sulfate, and the addition of collecting agent is 800 ~ 2000 grams/ton; Wherein, unit of gram/ton refer to per ton in ore deposit add the grams of material;
Described in step (2), adjusting agent is sodium carbonate, and the addition of sodium carbonate is 1000 ~ 2000 grams/ton; Described composite restrainer is the mixture of waterglass and aluminum sulfate, and the addition of waterglass is 1000 ~ 4000 grams/ton, the addition of aluminum sulfate is 100 ~ 600 grams/ton; Described combination activator is the mixture of calcium chloride and plumbi nitras, and the addition of calcium chloride is 100 ~ 600 grams/ton, the addition of plumbi nitras is 100 ~ 600 grams/ton; Described collecting agent is the mixture of 731 or 733 oxidized paraffin wax soaps or oleic acid or modification oleic acid one or both and benzyl hydroximic acid wherein, the interpolation total amount of collecting agent is 200 ~ 1000 grams/ton, wherein the addition of benzyl hydroximic acid be 100 ~ 400 grams/ton; Wherein, during unit of gram/ton refers at the bottom of tail-box per ton product add the grams of material.
Preferably, add hydrochloric acid when scanning described in step (1) or sulfuric acid control ph is 6 ~ 7, add waterglass or acidic water glass 100 ~ 500 grams/ton, starch or CMC carboxy methyl cellulose 100 ~ 500 grams/ton, add collecting agent 100 ~ 400 grams/ton.Step (1) described selected be 5 ~ 9 times selected, add hydrochloric acid or 0 ~ 800 gram of/ton of, sulfuric acid when each fluorite is selected respectively, adjusted to ph is 6 ~ 7, add waterglass or acidic water glass 50 ~ 500 grams/ton, starch or CMC carboxy methyl cellulose 50 ~ 400 grams/ton.Add 731 or 733 oxidized paraffin wax soaps or oleic acid or modification oleic acid 100 ~ 300 grams/ton, the dirty acid 100 ~ 250 grams of/ton of of benzene potassium hydroxyl when scanning in step (2) at every turn.In step (2) each selected time add waterglass 1000 ~ 2500 grams/ton, 150 ~ 250 grams/ton, aluminum sulfate.
Below in conjunction with principle, the invention will be further described:
For the prior art defect that fluorite and tungsten FLOTATION SEPARATION in the complex multi-metal ores such as tungstenic, molybdenum, bismuth, fluorite, calcite, garnet reclaim, the present invention proposes the flotation separation method of a kind of fluorite and white tungsten and other calcium minerals, comprises the flotation separation method of fluorite and white tungsten (or black and white tungsten) and other calcium minerals.Fluorite in the method energy high efficiente callback polymetallic ore and tungsten mineral.
In short, technical scheme of the present invention is: carry out the ore deposit flotation of molybdenum bismuth sulfur vulcanization to complex multi-metal ore, mine tailing reclaims the non magnetic ore (claiming to ore deposit 1) after wolframite through high intensity magnetic separation, but still have and seldom measure the clean wolframite of non-magnetic separation, or without high intensity magnetic separation molybdenum bismuth sulfur vulcanization ore deposit flotation tailing (claiming to ore deposit 2), adopt the beneficiation method suppressing the floating tungsten of tungsten mineral diffeential floatation fluorite-again, preferred compositions medicament is designed when fluorite diffeential floatation, effective suppression tungsten and other calcic gangue minerals, while obtaining high fluorite concentrate grade and recovery rate in ore-dressing, the loss late of tungsten in fluorite is made to be down to minimum, ensure recovery rate in ore-dressing during tungsten flotation simultaneously, obtain fluorite concentrate and tungsten concentrate product.
Specifically, the inventive method comprises the following steps:
1, to the sand setting of ore deposit 1 after thickening, or do not need dehydration to ore deposit 2(), two kinds different send into respectively in agitator add pH adjusting agent, composite restrainer, collecting agent stirring reaction to ore deposit after, enter diffeential floatation fluorite in flotation device, through one roughing once purging selection, scavenger concentrate order returns, and obtaining froth pulp is fluorite rough concentrate, and bottom land product is fluorite mine tailing; Fluorite rough concentrate is again through repeatedly selected, and flotation froth is final fluorite concentrate product.
2, for the wolframite adding adjusting agent, composite restrainer, combination activator, collecting agent Scheelite Flotation ore deposit again to product at the bottom of the tail-box after ore deposit 1 flotation fluorite and seldom measure, scan triple cleaning for three times through one roughing and obtain tungsten rough concentrate, selected chats, scavenger concentrate respectively order are back to last operation.Identical with to ore deposit 1 step for carrying out black, white tungsten bulk flotation to product at the bottom of the tail-box after ore deposit 2 flotation fluorite.
The present invention is completed by fluorite, tungsten flotation two steps.The key technology realizing these two steps is: 1. effectively can suppress tungsten and gangue mineral inhibitor design during fluorite preferably, reduce the loss of tungsten in fluorite process as far as possible; 2. when fluorite, repressed tungsten mineral activator design is preferred, enable effective recovery.The present invention is according to fluorite, white tungsten, the floatability difference of black tungsten under different pH value condition, use pH adjusting agent, control ph is under weak acid and neutrallty condition, effective tungsten and gangue mineral composite restrainer, pH adjusting agent are added in design simultaneously, effectively suppress tungsten mineral when realizing fluorite; By design tungsten mineral pH adjusting agent, combination activator, collecting agent, realize effective recovery of repressed tungsten mineral.
When step (1) described fluorite is roughly selected, interpolation pH adjusting agent is preferably selected from the one in sulfuric acid or hydrochloric acid, and wherein slurry pH controls is 6.0 ~ 7; Described composite restrainer is the mixture of starch and waterglass, or the mixture of starch and acidic water glass, or the mixture of CMC carboxy methyl cellulose and waterglass, or the mixture of CMC carboxy methyl cellulose and acidic water glass; The addition of starch or CMC carboxy methyl cellulose is 200 ~ 1500 grams/ton, the addition of waterglass or acidic water glass is 200 ~ 1800 grams/ton; Described acidic water glass is sulfuric acid: the ratio of waterglass=1:3 or 1:4 is prepared.
Step (1) described collecting agent is one or both in oleic acid, modification oleic acid, 731 or 733 oxidized paraffin wax soaps, lauryl sodium sulfate, and its addition is 800 ~ 2000 grams/ton;
Step (1) described one roughing, once purging selection, repeatedly selected, the chats (bottom land product) of each operation operates all orders routinely and turns back to last operation, namely chats returns in proper order, not need at refining process using chats as mine tailing secondary emission, fluorite froth pulp does not need carry out ore grinding again and directly enter next selected operation.
Described repeatedly selected, to ore deposit 1 be 5 ~ 8 times selected, to ore deposit 2 be 6 ~ 9 times selected, concentration times can adjust according to actual conditions.
Described multiple fine is elected to be in industry, and the selected operation of each fluorite adds hydrochloric acid respectively or sulfuric acid 0 ~ 800 gram of/ton of adjusted to ph is 6 ~ 7, adds waterglass or acidic water glass 50 ~ 500 grams/ton, starch or CMC carboxy methyl cellulose 50 ~ 400 grams/ton.
Described once purging selection adds hydrochloric acid or the some control ph of sulfuric acid are 6.5, waterglass or acidic water glass addition are 100 ~ 500 grams/ton, starch or CMC carboxy methyl cellulose addition are 100 ~ 500 grams/ton, add collector modified oleic acid 100 ~ 400 grams/ton.
The multiple fine that the present invention adopts chooses ore deposit to be back to last operation in proper order, and under the condition that ensure that fluorite concentrate quality, effectively can also ensure Fluorite recovery rate, technique is simply easy to implement.
The described tungsten floatation regulator of step (2) is sodium carbonate, addition 1000 ~ 2000 grams/ton, and ore pulp control ph is 8 ~ 9; Inhibitor is waterglass addition 1000 ~ 4000 grams/ton, 100 ~ 600 grams/ton, aluminum sulfate; Activator is 100 ~ 600 grams/ton, calcium chloride, and plumbi nitras addition is 100 ~ 600 grams/ton.
Step (2) described collecting agent is the dirty acid 100 ~ 400 grams/ton of benzene potassium hydroxyl, then adds oleic acid or modification oleic acid or 731 or 733 oxidized paraffin wax soaps wherein one or both 100 ~ 600 grams/ton.
Step (2) tungsten roughing flotation mine tailing enters three times and scans, and scans for three times middlely to add the dirty acid 100 ~ 250 grams/ton of collecting agent benzene potassium hydroxyl respectively, oleic acid or modification oleic acid or 731 or 733 oxidized paraffin wax soaps wherein one or both 100 ~ 300 grams/ton; Roughing flotation concentrate carries out triple cleaning, and triple cleaning adds inhibitor waterglass 1000 ~ 2500 grams/ton respectively, 150 ~ 250 grams/ton, aluminum sulfate, obtains white tungsten rough concentrate product.
Step (2) described tungsten rough concentrate is not final white tungsten fine ore product, also will obtain final tungsten concentrate product through common process heating concentration; Described black and white tungsten rough concentrate is not final black and white tungsten concentrate product, also will through common process heating concentration Scheelite Flotation ore deposit, and the gravity treatment of white tungsten flotation tailing is reclaimed black tungsten and obtained final wolframite product.
Step (1) and the described modification oleic acid of step (2) are oleic acid by weight: sodium carbonate=5:1 proportions.
Know-why of the present invention is:
To W, mo, bi fluorite complex multi-metal ore through sulfide flotation mine tailing, or sulfide flotation mine tailing reclaims the non-magnetic product after wolframite through high intensity magnetic separation, consider the floatability difference of fluorite, white tungsten and calcic gangue mineral under different pH condition, adopt flotation fluorite under the weak acid be applicable to and neutrallty condition, flotation of tungsten under weak base condition, diffeential floatation fluorite is flotation of tungsten ore-dressing technique again; The effective tungsten of preferred interpolation and gangue mineral composite restrainer waterglass or acidic water glass, starch or CMC carboxy methyl cellulose, starch is macromolecule polyalcohol, calcium ion effect in its hydroxyl and white tungsten and black tungsten, tungsten mineral is effectively suppressed, tungsten loss when avoiding fluorite, to ensure the recovery rate in ore-dressing of fluorite and tungsten.
Compared with prior art, advantage of the present invention is:
Diffeential floatation fluorite of the present invention flotation of tungsten mineral again, when can avoid diffeential floatation tungsten, high-alkali Water Under glass is to the strong inhibition of fluorite, the problem that the difficult flotation of fluorite floatability difference caused is reclaimed; And the loss of fluorite in tungsten floatation process that when avoiding diffeential floatation tungsten, some floatabilities are good, the drawback that the fluorite concentrate rate of recovery is low, can obtain high Fluorite recovery rate.Produce conventional flotation at present compare with identical ore deposit of giving, tungsten and Fluorite recovery rate improve 4% and 39 ~ 48% respectively, and tungsten rough concentrate grade is suitable, and fluorite concentrate grade improves 3% ~ 16%.
Diffeential floatation processing of fluorspar ores technique is simple, does not need at refining process ore grinding or secondary emission mine tailing again, and chats directly order returns, and produced on-site is easy to implement, control stability good.
Fluorite concentrate does not need through Ore Leaching, and direct flotation just can obtain high fluorite concentrate grade, and beneficiation cost is low, technique clean environment firendly.
During diffeential floatation fluorite, the loss late of tungsten is very low, and after fluorite, repressed tungsten flotation still can obtain high recovery rate in ore-dressing; Flotation obtains in tungsten concentrate and reduces containing fluorite, is conducive to the carrying out of the further heating concentration of tungsten, obtains high tungsten concentrate grade.
Detailed description of the invention
Below be only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to this embodiment, conceives various process programs without substantial differences all in protection scope of the present invention with the present invention.
Major metal mineral in Shizhuyuan, Hunan Province complex multi-metal ore are scheelite, wolframite, fluorite, molybdenite, bismuthine, cassiterite, magnetic iron ore, pyrite, and main gangue mineral is garnet, calcite, quartz, hornblend, chlorite, biotite, sericite and diopside.Tungsten in ore is with scheelite for main occupation rate is for 70%, and a small amount of wolframite occupation rate is 20 ~ 30%.
To ore deposit one: for after the Flotation of Sulfide Ores of Shizhuyuan, Hunan Province 380 ore dressing plant again high intensity magnetic separation reclaim the mine tailing (non magnetic ore) after black tungsten, wherein the black tungsten overwhelming majority reclaims through high intensity magnetic separation, mainly scheelite in magnetic tailing, WO 3content is 0.35% ~ 0.50%, CaF 2content is 25% ~ 32%;
To ore deposit two: be Shizhuyuan, Hunan Province 2000 tons of ore dressing plant sulfide flotation mine tailings, the tungsten in this mine tailing is with scheelite for main occupation rate is for 70 ~ 80%, and a small amount of wolframite occupation rate is 20 ~ 30%, WO 3content is 0.17% ~ 0.38%, CaF 2content is 16% ~ 26%.
Technological invention with give ore deposit one and give ore deposit two for research object, the comprehensive recovering process of fluorite and tungsten in a kind of complex multi-metal ore is provided.
embodiment one
To ore deposit one.Fluorite diffeential floatation is selected through one roughing once purging selection five times, obtains fluorite concentrate, and each operation chats order is back to previous stage operation.Fluorite roughly selects that to add some hydrochloric acid control ph be 6.5; Add inhibitor waterglass or acidic water glass is 300 ~ 1500 grams/ton, starch consumption 300 ~ 800 grams/ton, stir 5 minutes; Add collector modified oleic acid 800 ~ 1500 grams/ton gram/ton, stir 2 minutes; Five times selected time be 6.5 in the selected hydrochloric acid control ph that adds respectively each time, waterglass or acidic water glass 50 ~ 500 grams/ton, starch 50 ~ 400 grams/ton; It is 6.5 that once purging selection adds the some control ph of hydrochloric acid, and waterglass or acidic water glass are 200 ~ 400 grams/ton, starch consumption 200 ~ 400 grams/ton, add collector modified oleic acid 100 ~ 300 grams/ton.
Then white tungsten (seldom the black tungsten of amount) roughing flotation is carried out to above-mentioned fluorite mine tailing, add 1000 ~ 2000 grams/ton, adjusting agent sodium carbonate; Inhibitor waterglass 1000 ~ 4000 grams/ton, 100 ~ 500 grams/ton, aluminum sulfate; 100 ~ 400 grams/ton, activator calcium chloride, plumbi nitras 100 ~ 400 grams/ton; The dirty acid 100 ~ 400 grams/ton of collecting agent benzene potassium hydroxyl, 731 oxidized paraffin wax soaps 150 ~ 400 grams/ton, carry out white tungsten roughing flotation after stirring; Roughing flotation mine tailing enters three times and scans, and scans the dirty acid 100 ~ 250 grams/ton of the middle collecting agent of interpolation respectively benzene potassium hydroxyl for three times, 731 oxidized paraffin wax soaps 100 ~ 300 grams/ton; Roughing flotation concentrate carries out triple cleaning, and triple cleaning adds inhibitor waterglass 1000 ~ 2500 grams/ton respectively, 150 ~ 250 grams/ton, aluminum sulfate, obtains white tungsten rough concentrate product.
Obtain mineral processing index: fluorite concentrate is containing CaF 296.41%, containing WO 30.09%, be 74.27% to raw ore Fluorite recovery rate; White tungsten flotation obtains tungsten rough concentrate containing WO 33.0%, the rate of recovery is 73.37 %.
embodiment two
Embodiment two with the difference of embodiment one is: to adopt to ore deposit two as flotation to ore deposit.Fluorite diffeential floatation is selected through one roughing once purging selection seven times, obtains fluorite concentrate, and each operation chats order returns previous stage operation.Fluorite is roughly selected, scan and seven selected medicament interpolations, pH value control identical with embodiment one.
Fluorite mine tailing carries out the bulk flotation of black and white tungsten, adjusting agent, inhibitor, activator, collecting agent is added respectively in ore deposit, medicament kind and content identical with embodiment one, carry out black, white tungsten flotation, scan triple cleaning for three times through one roughing and obtain black, white tungsten mixed crude concentrate product.
Obtain mineral processing index: fluorite concentrate is containing CaF 290.35%, containing WO 30.10%, be 58.8% to raw ore Fluorite recovery rate; White tungsten flotation obtains tungsten rough concentrate containing WO 32.54%, the rate of recovery is 82.17 %.
embodiment three
Embodiment three is with the difference of embodiment two, and the fluorite concentrate of embodiment two is carried out high intensity magnetic separation further, improves the W content in fluorite concentrate grade reduction fluorite concentrate after magnetic separation.
Obtain mineral processing index: fluorite concentrate is containing CaF 293.91%, containing WO 30.08%, be 50.7% to raw ore Fluorite recovery rate; White tungsten flotation obtains tungsten rough concentrate containing WO 32.59%, the rate of recovery is 83.57 %.
embodiment oneproduce conventional flotation at present compare with identical ore deposit of giving, tungsten and Fluorite recovery rate improve 4% and 39 ~ 48% respectively, and tungsten rough concentrate grade is suitable, and fluorite concentrate grade improves 3% ~ 16%.
embodiment twoproduce floatation indicators at present to ore deposit to compare Fluorite recovery rate and improve 11.0% with identical, fluorite concentrate grade is suitable; The floatation indicators of tungsten is suitable.
embodiment threewith produces at present floatation indicators and compares Fluorite recovery rate and improve 3%, fluorite concentrate grade raising 3%; The flotation recovery rate of tungsten improves 3%.

Claims (7)

1. a beneficiation method for fluorite and tungsten FLOTATION SEPARATION, is characterized in that, described method comprises the steps:
(1) using the mine tailing after polymetallic ore Flotation of Sulfide Ores or sulfide flotation mine tailing the non-magnetic product after high intensity magnetic separation as give ore deposit, send in agitator and add pH adjusting agent, composite restrainer, collecting agent, send into after stirring in flotation device, under faintly acid or neutrallty condition, suppress tungsten and gangue mineral flotation fluorite, through one roughing, once purging selection, selected at least one times after, gained flotation froth is fluorite concentrate product;
(2) in the product being at the bottom of tail-box after step (1) flotation fluorite, adjusting agent, composite restrainer, combination activator, collecting agent is added, flotation scheelite or Scheelite-Wolframite Mixed Mine under weak basic condition, controlling tungsten flotation pulp pH value is 8 ~ 9, through one roughing, scan for three times, triple cleaning obtains tungsten rough concentrate; Selected chats, scavenger concentrate respectively order return;
Wherein, described in step (1), pH adjusting agent is sulfuric acid or hydrochloric acid, and adjusting to ore deposit pH is 6 ~ 7; Described composite restrainer is the mixture of starch and waterglass or acidic water glass, or the mixture of CMC carboxy methyl cellulose and waterglass or acidic water glass; The addition of starch or CMC carboxy methyl cellulose is 200 ~ 1500 grams/ton, the addition of waterglass or acidic water glass is 200 ~ 1800 grams/ton; Described collecting agent is one or both in oleic acid, modification oleic acid, 731 or 733 oxidized paraffin wax soaps, lauryl sodium sulfate, and the addition of collecting agent is 800 ~ 2000 grams/ton; Wherein, unit of gram/ton refer to per ton in ore deposit add the grams of material;
Described in step (2), adjusting agent is sodium carbonate, and the addition of sodium carbonate is 1000 ~ 2000 grams/ton; Described composite restrainer is the mixture of waterglass and aluminum sulfate, and the addition of waterglass is 1000 ~ 4000 grams/ton, the addition of aluminum sulfate is 100 ~ 600 grams/ton; Described combination activator is the mixture of calcium chloride and plumbi nitras, and the addition of calcium chloride is 100 ~ 600 grams/ton, the addition of plumbi nitras is 100 ~ 600 grams/ton; Described collecting agent is the mixture of 731 or 733 oxidized paraffin wax soaps or oleic acid or modification oleic acid one or both and benzyl hydroximic acid wherein, the interpolation total amount of collecting agent is 200 ~ 1000 grams/ton, wherein the addition of benzyl hydroximic acid be 100 ~ 400 grams/ton; Wherein, during unit of gram/ton refers at the bottom of tail-box per ton product add the grams of material.
2. the method for claim 1, it is characterized in that, hydrochloric acid is added or sulfuric acid control ph is 6 ~ 7 when scanning described in step (1), add waterglass or acidic water glass 100 ~ 500 grams/ton, starch or CMC carboxy methyl cellulose 100 ~ 500 grams/ton, add collecting agent 100 ~ 400 grams/ton.
3. method as claimed in claim 2, it is characterized in that, step (1) described selected be 5 ~ 9 times selected, add hydrochloric acid or 0 ~ 800 gram of/ton of, sulfuric acid when each fluorite is selected respectively, adjusted to ph is 6 ~ 7, add waterglass or acidic water glass 50 ~ 500 grams/ton, starch or CMC carboxy methyl cellulose 50 ~ 400 grams/ton.
4. method as claimed in claim 2, is characterized in that, adds 731 or 733 oxidized paraffin wax soaps or oleic acid or modification oleic acid 100 ~ 300 grams/ton, benzyl hydroximic acid 100 ~ 250 grams of/ton of when scanning in step (2) at every turn.
5. method as claimed in claim 4, is characterized in that, in step (2) each selected time add waterglass 1000 ~ 2500 grams/ton, 150 ~ 250 grams/ton, aluminum sulfate.
6. the method for claim 1, is characterized in that, the acidic water glass described in step (1) is formed by the proportions of sulfuric acid and waterglass 1:3 or 1:4 by volume.
7. the method for claim 1, is characterized in that, step (1) and the modification oleic acid described in step (2) are formed by oleic acid and the sodium carbonate proportions by weight 5:1.
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