CN103831173A - Technique of improving rare earth recovery rate and fluorite grade in tailings - Google Patents
Technique of improving rare earth recovery rate and fluorite grade in tailings Download PDFInfo
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- CN103831173A CN103831173A CN201410097246.5A CN201410097246A CN103831173A CN 103831173 A CN103831173 A CN 103831173A CN 201410097246 A CN201410097246 A CN 201410097246A CN 103831173 A CN103831173 A CN 103831173A
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Abstract
The invention discloses a technique of improving rare earth recovery rate and fluorite grade in tailings, and the technique of improving rare earth recovery rate and fluorite grade in tailings comprise the following steps of : (1) mixing foam and mixing tailings are obtained through level one roughing, multistage of scavenging and multistage of refined selection of the tailings raw material; (2) total rare earth enrichment content and total fluorite enrichment content are obtained by separating the mixing foam; (3) rare earth concentrate is obtained through the level one roughing, multistage of scavenging and multistage of refined selection of the total rare earth enrichment content; (4) fluorite concentrate is obtained through the level one roughing, multistage of scavenging and multistage of refined selection of the total fluorite enrichment content. The technique of improving rare earth recovery rate and fluorite grade in tailings is capable of improving rare earth recovery rate and fluorite grade in tailings.
Description
Technical field
The present invention relates to metal ore dressing field, particularly relate to a kind of process that improves the mine tailing middle rare earth rate of recovery and fluorite grade.
Background technology
Baiyuneboite is containing abundant iron, rare earth, niobium and fluorite etc., the rare mineral resources in the world, but because technique of preparing is not broken through, in producing at present, the iron of 70% left and right and the rare earth of 10% left and right are only recycled, all the other are all drained in mine tailing, the mine tailing amount of storing up is very large, has not only wasted mineral resources, and environment has been brought to impact.
The achievement of in the past few decades this mineral intergrowth being selected smelting research has been summed up in " baiyuneboite smelting process " of being write by Baogang in nineteen ninety-five, particularly ore-dressing technique achievement in research, aspect ore dressing, adopt weak magnetic-strong magnetic-flotation combined ore-dressing technique, iron concentrate grade is greater than 60%, and the rate of recovery is greater than 70%; Rare earth ore concentrate grade also can reach more than 60%, but the rate of recovery is not high, also has at present minority to produce the factory of rare earth ore concentrate from raw ore, and rare earth ore concentrate grade, less than 50%, only has 45% left and right, and the rate of recovery is only 40～50%.The present rare earth ore concentrate overwhelming majority is to produce from the mine tailing of this mineral intergrowth, it is the later chats of high intensity magnetic separation iron, also can be described as the mine tailing selecting after iron, the content of rare earth of only strong magnetic chats is higher, branch away separately for the raw material that selects rare earth, with these raw materials through mineral processing production rare earth ore concentrate out, grade only 50%, also 60% left and right only of the rate of recovery.If the rare earth ore concentrate that production grade is greater than 60%, the rate of recovery is just lower, therefore for factory's efficiency problem, and the rare earth ore concentrate that not production grade is greater than 60% conventionally.
Long research work has also been done in the ore dressing of fluorite, and " baiyuneboite smelting process " has introduced high intensity magnetic separation mine tailing and reclaim the ore dressing small-scale test of fluorite, and result of the test is fluorite grade 85.14%, and the rate of recovery only has 30% left and right.Within 1992, ore dressing plant provides the small-scale test report of reclaiming fluorite from strong magnetic rougher tailings, from mine tailing, first select grade 81.20%, the fluorite rough concentrate of the rate of recovery 50.18%, regrind to-320 orders and account for 95%, be 95.82% through four selected acquisition fluorite concentrate grades again, the fluorite concentrate that the rate of recovery is 25.85%.
Summary of the invention
The object of this invention is to provide a kind of process that improves the mine tailing middle rare earth rate of recovery and fluorite grade, can obtain rare earth ore concentrate grade containing rare earth oxide (rare earth oxides by the present invention, REO) more than 60%, its operation recovery reaches more than 90%, and grade is more than 97% fluorite concentrate.
Technical scheme is specific as follows:
A process that improves the mine tailing middle rare earth rate of recovery and fluorite grade, comprises the following steps:
1) by mine tailing raw material through one-level roughly select, multistage scanning with multistage obtain mix-froth after selected and mix mine tailing; Mine tailing raw material obtains roughly selecting concentrate and rougher tailings through roughly selecting, and rougher tailings is scanned and isolated mixing mine tailing, will roughly select concentrate and carry out the selected mix-froth of isolating; The multistage chats of choosing every one-level to obtain with multi-level oil of scanning returns to upper level;
2) described mix-froth is separated and obtain total rare earth (TRE) enriched substance and total fluorite enriched substance;
3) by described total rare earth (TRE) enriched substance through one-level roughly select, multistage scanning with multistage obtain rare earth ore concentrate after selected; Described total rare earth (TRE) enriched substance obtains roughly selecting rare earth ore concentrate and roughly selects rare-earth tailing through roughly selecting, and will roughly select rare-earth tailing and scan, and will roughly select rare earth ore concentrate and carry out the selected rare earth ore concentrate of isolating; The multistage chats of choosing every one-level to obtain with multi-level oil of scanning returns to upper level;
4) by described total fluorite enriched substance through one-level roughly select, multistage scanning with multistage obtain fluorite concentrate after selected; Described total fluorite enriched substance obtains roughly selecting fluorite concentrate and roughly select fluorite mine tailing through roughly selecting, and will roughly select fluorite mine tailing and scan and isolate true tailings, will roughly select fluorite concentrate and carry out the selected fluorite concentrate of isolating; The multistage chats of choosing every one-level to obtain with multi-level oil of scanning returns to upper level.
Further: in step 1), pH is 10～11, temperature is 25 DEG C～30 DEG C, comprises that one roughing, secondary scan with four times selected; In roughly selecting, in every 250g mine tailing raw material, add Na
2cO
329～32ml, waterglass 18～21ml, collecting agent 49～52ml, obtains roughly selecting concentrate and rougher tailings; To after rougher tailings ore grinding, enter and scan, the first order adds 9～12ml waterglass and 18～21ml collecting agent in scanning, and the second level is scanned and added 9～12ml collecting agent; To roughly select concentrate and carry out selectedly, the first order is selected to selected middle 13～16ml, 9～12ml, 9～12ml, the 4～7ml waterglass of adding respectively of the fourth stage.
Further: step 2) described in after mix-froth reagent removal, obtain the first rareearth enriching material and the first fluorite enriched substance; The first fluorite enriched substance is washed and concentrated, obtain the second rareearth enriching material and the second fluorite enriched substance; In the time that iron content is greater than 3% in described the first rareearth enriching material, by described the first rareearth enriching material deferrization, obtain the 3rd rareearth enriching material;
In step 3), roughly select after rare-earth tailing is scanned and isolate the 3rd fluorite enriched substance; Using the second fluorite enriched substance and the 3rd fluorite enriched substance as total fluorite enriched substance; When in described the first rareearth enriching material when iron content > 3%, using the second rareearth enriching material and the 3rd rareearth enriching material as total rare earth (TRE) enriched substance; When in the first rareearth enriching material when iron content≤3%, using the first rareearth enriching material and the 3rd rareearth enriching material as total rare earth (TRE) enriched substance.
Further: step 2) described in reagent removal comprise six times selected, front triple cleaning respectively adds 15ml waterglass, rear triple cleaning respectively adds 10ml waterglass, every grade of reinforced dry weight when selected is 250 grams.
Further: step 3) comprises that one roughing, secondary scan and triple cleaning, and wherein, roughly selecting temperature is 38～45 DEG C, scans with selected temperature and is 33～37 DEG C; In roughly selecting, add waterglass 10～13ml, lignin 2～5ml, collecting agent 16～19ml, foaming agent is No. 2 oil, addition is 3～4 of 10ml needle tubings, obtains roughly selecting rare earth ore concentrate and roughly selects rare-earth tailing; To roughly select rare-earth tailing and scan, the first order adds 5～8ml waterglass and 13～16ml collecting agent in scanning, and the second level is scanned and added 4～7ml waterglass and 18～20ml collecting agent; To roughly select rare earth ore concentrate carry out selected, the selected waterglass 5～8ml that adds of the first order, lignin 2～5ml and collecting agent 14～16ml; During the selected and third level in the second level is selected, all add waterglass 5～8ml, lignin 2～5ml and collecting agent 11～15ml.
Further: in step 4), pH is 11～12, and temperature is room temperature, comprise that one roughing, secondary scan with 5～8 times selected; In roughly selecting, add Na
2cO
34～6ml, waterglass 13～16ml, oleic acid 8～11ml, obtains roughly selecting fluorite concentrate and roughly selects fluorite mine tailing; To roughly select fluorite mine tailing and scan, the first order adds 4～6ml waterglass and 10～12ml oleic acid in scanning, and the second level is scanned and added 8～11ml oleic acid; To roughly select fluorite concentrate and carry out selectedly, the first order is selected adds 14～17ml waterglass in selected to the fourth stage, and level V is selected adds 8～10ml waterglass and 3～5ml oleic acid in selected to the 8th grade.
Further: when iron content is greater than 3% in total fluorite enriched substance, under the condition that is 0.2T～0.8T in Surface field intensity, to carry out deferrization.
Further: described waterglass and Na
2cO
3solute mass fraction be 5%; The solute mass fraction of described collecting agent and described oleic acid is 2%.
Further: in the time that iron content is greater than 1% in described fluorite concentrate, under the condition that is 0.6T～1.0T in Surface field intensity, to fall iron.
Further: in the time that in described fluorite concentrate, calcium oxide content is greater than 1%, the chlorohydric acid pickling that is 5% through solute mass fraction by it, solid-liquid volume ratio is 1:10, and temperature is 60～90 DEG C, and the time is more than 10 minutes, and obtaining grade is more than 97% fluorite concentrate.
Beneficial effect of the present invention:
1, taking Bayan Obo mine tailing or with it mineral composition similar contain the ores such as rare earth, thorium, iron, fluorite and niobium as raw material, adopt flotation, magnetic separation to improve a recovering rare earth and processing of fluorspar ores technique, each separation operation all adopts one roughing, multistage scanning and multistage selected closed circuit tandem ore-dressing technique mode, two kinds of products of each separation operation output concentrate and tailings, there is no chats product, thereby improve rare earth yield and fluorite grade.
2, the present invention improves the traditional handicraft of recovering rare earth and fluorite from Bayan Obo mine tailing, each ore-dressing practice in this new technology has adopted the closed circuit ore dressing mode of tandem, its form is by roughly selecting, scan and the selected closed circuit form of returning to step by step upper level, to obtain the concentrate of high-grade and high-recovery.
3, the present invention adopts that one-level is roughly selected, multistage scanning and the closed circuit ore dressing mode of multistage selected tandem, be the rare earths material (rareearth enriching material) of 15% left and right from grade, the rare earth ore concentrate grade obtaining is containing more than REO60%, operation recovery is more than 90%, and this Joint Index has exceeded all historical index of researching and producing rare earth ore concentrate from this mineral intergrowth ore dressing; Adjust progression and can also reach higher grade and the rate of recovery, and institute's with medicament is all traditional medicament.
4, utilize production technology of the present invention, producing grade is more than 97% fluorite concentrate: the iron in control fluorite raw material and content of rare earth are below 2%, more low better; In the time that the fluorite concentrate sub-electing does not reach specification requirement, carry out pickling with watery hydrochloric acid; When iron content is greater than 1% in fluorite concentrate, also can fall iron with strong magnetic, make fluorite concentrate reach higher grade.
Brief description of the drawings
Fig. 1 is the flow chart of bulk flotation technique in the present invention;
Fig. 2 is selected reagent removal process chart in the present invention;
Fig. 3 is the separation process figure of mix-froth in the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Integral Thought of the present invention is: the first step is divided into groups by bulk flotation, is divided into taking rare earth, fluorite as main froth pulp with taking iron, niobium as main product from failing.By one roughing, repeatedly scan and repeatedly selected, the rate of recovery of mix-froth middle rare earth and fluorite is greater than 95%, and mine tailing middle rare earth content is less than 1%, and fluorine content is less than 1.5%.When mix-froth is carried out to follow-up flotation, magnetic separation, adopt one roughing, multistage scanning and multistage selected ore dressing mode, the chats of every one-level returns to upper level step by step, rare earth ore concentrate sorting adopts that one-level is roughly selected, scanned for twice, triple cleaning, fluorite sorting adopt one roughing, secondary scan, five times to eight times selected, thereby improve rare earth yield and fluorite grade.
Scanning can be according to concentrate and tailings index request with selected progression, calculate with separation, scanning with selected progression is to change with technical indicator is different, and introducing cascade extraction theory (" rare earth " (first volume) cascade extraction theory) should be in ore dressing:
In formula (1), n scans progression, and the m in formula (2) represents selected progression,
represent separation, in formula, a, b are purification, and a and b are calculated by following formula:
In formula
represent easy ore dressing thing A and the refractory minerals B purity (percentage) in concentrate; P
a, P
brepresent easy ore dressing thing A and the refractory minerals B purity (percentage) in mine tailing; f
a, f
bthe content of easy ore dressing thing A and refractory minerals B in expression raw material.
In the embodiment of the present invention, agents useful for same is preferred: waterglass and Na
2cO
3solute mass fraction be 5%; The solute mass fraction of collecting agent (GE-28) is 2%; The solute mass fraction of oleic acid is 2%; The solute mass fraction of lignin is 1%.Roughly select 200 grams of chargings, ball mill is 100g mill 10 minutes at every turn.
Bulk flotation condition:
Roughly select: raw material 250g; Na
2cO
35% (W), 30ml; Waterglass 5% (W), 20ml;
Collecting agent (GE-28) 2% (W) 50ml; PH10～11; 25 DEG C～30 DEG C of temperature;
Scan: roughly select rear mine tailing and carry out ore grinding, 100g mill 10 minutes, granularity reaches-200 orders, 96.8%.
Sweep: waterglass, 10ml; GE-28,20ml;
Two sweep: only add GE-28,10ml;
Selected: an essence, 15ml waterglass; Do not add GE-28;
Two essences, three essences respectively add 10ml waterglass, do not add GE-28;
Four finishing 5ml waterglass.
Can reach balance through 20 times～30 times closed-circuit tests, reach the result in embodiment, productive rate, grade and the rate of recovery of foam and mine tailing.
Embodiment 1
In the present embodiment, the process that improves the mine tailing middle rare earth rate of recovery and fluorite grade comprises the following steps:
1) bulk flotation
As shown in Figure 1, be the flow chart of bulk flotation technique; In bulk flotation technique, pH is 10～11, and temperature is 25 DEG C.Bulk flotation comprises that one roughing, secondary scan with four times selected.
Be more than 7.00% by REO grade, fluorite grade is that more than 11.5% Bayan Obo mine tailing 250g roughly selects, and adds Na
2cO
330ml, waterglass 20ml, collecting agent 50ml, obtains roughly selecting concentrate and rougher tailings, and roughly selecting concentrate, to proceed the first order selected.
Rougher tailings is carried out to ore grinding, and granularity reaches-200 orders and accounts for more than 96.8%.
Mine tailing after ore grinding is carried out to the first order and scan, add waterglass 10ml, collecting agent 20ml, obtains first order scavenger concentrate and the first order and scans mine tailing, and first order scavenger concentrate returns next time to be roughly selected.
The first order is scanned to mine tailing and carry out the second level and scan, add collecting agent 10ml, obtain second level scavenger concentrate and mix mine tailing, second level scavenger concentrate returns to ore grinding next time, and mixing mine tailing is discharged to Tailings Dam.
To roughly select concentrate, to carry out the first order selected, adds 15ml waterglass, obtains the selected concentrate of the first order and first order cleaner tailings, and first order cleaner tailings returns next time to be roughly selected.
Selected first order concentrate is carried out to the second level selected, add 10ml waterglass, obtain the selected concentrate in the second level and second level cleaner tailings, it is selected that second level cleaner tailings returns to the first order.
Selected second level concentrate is carried out to the third level selected, add 10ml waterglass, obtain the selected concentrate of the third level and third level cleaner tailings, it is selected that third level cleaner tailings returns to the second level.
Selected third level concentrate is carried out to the fourth stage selected, add 5ml waterglass, obtain mix-froth and fourth stage cleaner tailings, it is selected that fourth stage cleaner tailings returns to the third level, and mix-froth is proceeded separating technology.
Through reaching balance through 20 closed-circuit tests, wherein, in the mix-froth obtaining, the productive rate of mix-froth is 63.06%, the grade of REO and fluorite is respectively 11.21%, 16.90%, and the operation recovery of rare earth ore concentrate and fluorite concentrate is respectively to 96.32%, 96.54%; In the mixing mine tailing obtaining, the productive rate that mixes mine tailing is that the grade of 36.94%, REO and fluorite is respectively 0.73%, 1.02%, and the operation recovery of rare earth ore concentrate and fluorite concentrate is respectively to 3.68%, 3.46%.
2) separation of mix-froth
As shown in Figure 2, be selected reagent removal process chart in the present invention.Mix-froth is carried out to reagent removal, obtain the first rareearth enriching material and the first fluorite enriched substance.The mode that reagent removal adopts mechanical reagent removal and washing reagent removal to combine, it is the selected reagent removal of flotation, through six selected (or thick five essences) reagent removals of foam, obtain ore pulp product, it is concentrated through washing that (postprecipitation adds water, remove supernatant concentration) obtain the first rareearth enriching material, and another froth pulp, obtain the first fluorite enriched substance through washing reagent removal.Every grade adds the waterglass of varying number, and front triple cleaning respectively adds 15ml waterglass, and rear triple cleaning respectively adds 10ml waterglass, and every grade of reinforced dry weight when selected is 250 grams.Wherein, the productive rate of the first rareearth enriching material is that 70.33%(is 44.3% to the productive rate of former total mine tailing), the grade of REO is 13.00%, its operation recovery is 82%; The productive rate of the first fluorite enriched substance is that 29.67%(is 18.74% to the productive rate of former total mine tailing), the grade of fluorite is 6.80%, its operation recovery is 18%.
As shown in Figure 3, for the separation process figure of mix-froth, the first fluorite enriched substance is washed to concentrated (postprecipitation adds water, remove supernatant concentration), obtain the second rareearth enriching material and the second fluorite enriched substance, wherein, the productive rate of the second rareearth enriching material is that 43.8%(is 8.3% to the productive rate of former total mine tailing), the grade of REO is 14.9%, and its operation recovery is 90.6%; The productive rate of the second fluorite enriched substance is that 56.2%(is 10.4% to the productive rate of former total mine tailing), the grade of fluorite is 1.13%, its operation recovery is 9.40%.
In the time that in the first rareearth enriching material, iron content is greater than 3%, the first rareearth enriching material is carried out to strong magnetic deferrization, Surface field intensity is below 1T, obtains the 3rd rareearth enriching material and iron enriched substance, iron enriched substance is returned to mix and is roughly selected.Wherein, the productive rate of the 3rd rareearth enriching material is that 52.4%(is 33.1% to the productive rate of former total mine tailing), the grade of REO is 13.26%, its operation recovery is 84%; The productive rate of iron enriched substance is that 17.9%(is 11.2% to the productive rate of former total mine tailing), the grade of REO is 7.35%, its operation recovery is 16.0%.
3) flotation of rareearth enriching material
Carry out flotation using the second rareearth enriching material and the 3rd rareearth enriching material as total rare earth (TRE) enriched substance (when in the first rareearth enriching material when iron content≤3%, using the first rareearth enriching material and the 3rd rareearth enriching material as total rare earth (TRE) enriched substance), the flotation of rareearth enriching material comprises that one roughing, secondary scan and triple cleaning.
Total rare earth (TRE) enriched substance is roughly selected, and the grade that total rare earth (TRE) enriched substance is 41.4%, REO to the productive rate of former total mine tailing is 14.57%.Add waterglass 12ml, lignin 3ml, collecting agent 18ml, foaming agent is No. 2 oil, and addition is 3～4 of 10ml needle tubings, controls that to roughly select temperature be 40 DEG C, obtains roughly selecting rare earth ore concentrate and roughly selects rare-earth tailing, and roughly selecting rare earth ore concentrate, to proceed the first order selected.
To roughly select rare-earth tailing and carry out the first order and scan, controlling and scanning temperature is 35 DEG C, adds waterglass 6ml, and collecting agent 15ml obtains that the first order is scanned rare earth ore concentrate and the first order is scanned rare-earth tailing, and the first order is scanned rare earth ore concentrate and returned and roughly select.
The first order is scanned to rare-earth tailing and carry out the second level and scan, controlling and scanning temperature is 35 DEG C, adds waterglass 6ml, and collecting agent 20ml, must arrive the second level and scan rare earth ore concentrate and the 3rd fluorite enriched substance, and the second level is scanned rare earth ore concentrate and returned to the first order and scan.The productive rate of the 3rd fluorite enriched substance is that 78.30%(is 32.42% to the productive rate of former total mine tailing), the grade of fluorite is 1.79%, its operation recovery is 9.61%.
To roughly select rare earth ore concentrate and carry out selectedly, controlling selected temperature is 35 DEG C, wherein, and the selected waterglass 6ml that adds of the first order, lignin 3ml and collecting agent 15ml; During the selected and third level in the second level is selected, all add waterglass 6ml, lignin 3ml and collecting agent 13ml; Every one-level selected all outputs rare earth ore concentrate and rare-earth tailing, rare-earth tailing all returns to upper level flotation, and rare earth ore concentrate is as the raw material of next stage.
Reach after balance through 20 times, obtain result of the test, the rare earth ore concentrate productive rate finally obtaining is that 21.7%(is 8.98% to the productive rate of former total mine tailing), the grade of REO is 60.72%, its operation recovery is 90.39%.
4) flotation of fluorite enriched substance
The second fluorite enriched substance and the 3rd fluorite enriched substance are carried out to flotation as total fluorite enriched substance, more than the amount of total fluorite enriched substance needs 150g, control iron in total fluorite enriched substance and content of rare earth below 2%, flotation temperature is room temperature, and PH is 11～12.The flotation of fluorite enriched substance comprises that one roughing, secondary scan with 8 times selected.
When iron content is greater than 3% in total fluorite enriched substance, under the condition that is 0.2T～0.8T in Surface field intensity, carry out deferrization.
Total fluorite enriched substance is roughly selected, and total fluorite enriched substance is 42.82% to the productive rate of former total mine tailing, and the grade of fluorite is 27.5%.Every 150g adds sodium carbonate 5ml, waterglass 15ml, and oleic acid 10ml, obtains roughly selecting fluorite concentrate and roughly select fluorite mine tailing, and roughly selecting fluorite concentrate, to proceed the first order selected.
To roughly select fluorite mine tailing and carry out the first order and scan, and add 5ml waterglass, 10ml oleic acid, obtains that the first order is scanned fluorite concentrate and the first order is scanned fluorite mine tailing, and the first order is scanned fluorite concentrate and returned and roughly select.
The first order is scanned to fluorite mine tailing and carry out the second level and scan, add 10ml oleic acid, must arrive the second level and scan fluorite concentrate and true tailings, the second level is scanned fluorite concentrate and is returned to the first order and scan.The productive rate of true tailings is 47%, and detecting content of fluoride ion is 4.95%, and the grade of fluorite is 10.16%, and its operation recovery is 8.61%.
To roughly select fluorite concentrate carries out selected, wherein the first order is selected adds 15ml waterglass in selected to the fourth stage, level V is selected adds 10ml waterglass and 5ml oleic acid in selected to the 8th grade, every one-level selected all outputs fluorite concentrate and fluorite mine tailing, fluorite mine tailing all returns to upper level flotation, and fluorite concentrate is as the raw material of next stage.The productive rate of the fluorite concentrate finally obtaining is that 53%(is 22.7% to the productive rate of former total mine tailing), detecting content of fluoride ion is 46.55%, and the grade of fluorite is 95.58%, and its operation recovery is 91.39%.
When in the fluorite concentrate finally obtaining, when iron content is greater than 1%, under the condition that is 0.6T～1.0T, iron falls in Surface field intensity.
In the time that in the fluorite concentrate finally obtaining, calcium oxide content is greater than 1%, the chlorohydric acid pickling that is 5% through solute mass fraction by it, solid-liquid volume ratio is 1:10,60～90 DEG C of temperature, 10 minutes time, measure the proper extension time when large, finally obtain high-grade fluorite concentrate.The productive rate of high-grade fluorite concentrate is that 49.80%(is 21.6% to the productive rate of former total mine tailing), detecting content of fluoride ion is 47.35%, the grade of REO and fluorite is respectively 0.61%, 97.22%, and the operation recovery of rare earth ore concentrate and fluorite concentrate is respectively to 2.40%, 86.82%.
Embodiment 2
In the present embodiment, the process that improves the mine tailing middle rare earth rate of recovery and fluorite grade comprises the following steps:
1) bulk flotation
As shown in Figure 1, be the flow chart of bulk flotation technique, in bulk flotation technique, pH is 10～11, temperature is 30 DEG C.Bulk flotation comprises that one roughing, secondary scan with four times selected.
Be more than 7.00% by REO grade, fluorite grade is that more than 11.5% Bayan Obo mine tailing 250g roughly selects, and adds while stirring Na
2cO
332ml, waterglass 18ml, collecting agent 52ml, obtains roughly selecting concentrate and rougher tailings, and roughly selecting concentrate, to proceed the first order selected.
Rougher tailings is carried out to ore grinding, and granularity reaches-200 orders and accounts for more than 96.8%.
Mine tailing after ore grinding is carried out to the first order and scan, add waterglass 9ml, collecting agent 21ml, obtains first order scavenger concentrate and the first order and scans mine tailing, and first order scavenger concentrate returns next time to be roughly selected.
The first order is scanned to mine tailing and carry out the second level and scan, add collecting agent 9ml, obtain second level scavenger concentrate and mix mine tailing, second level scavenger concentrate returns to ore grinding next time, and mixing mine tailing is discharged to Tailings Dam.
To roughly select concentrate, to carry out the first order selected, adds 13ml waterglass, obtains the selected concentrate of the first order and first order cleaner tailings, and first order cleaner tailings returns next time to be roughly selected.
Selected first order concentrate is carried out to the second level selected, add 12ml waterglass, obtain the selected concentrate in the second level and second level cleaner tailings, it is selected that second level cleaner tailings returns to the first order.
Selected second level concentrate is carried out to the third level selected, add 12ml waterglass, obtain the selected concentrate of the third level and third level cleaner tailings, it is selected that third level cleaner tailings returns to the second level.
Selected third level concentrate is carried out to the fourth stage selected, add 4ml waterglass, obtain mix-froth and fourth stage cleaner tailings, it is selected that fourth stage cleaner tailings returns to the third level, and mix-froth is proceeded separating technology.
Through reaching balance through 25 closed-circuit tests, wherein, in the mix-froth obtaining, the productive rate of mix-froth is 63.06%, the grade of REO and fluorite is respectively 11.21%, 16.90%, and the operation recovery of rare earth ore concentrate and fluorite concentrate is respectively to 96.32%, 96.54%; In the mixing mine tailing obtaining, the productive rate that mixes mine tailing is that the grade of 36.94%, REO and fluorite is respectively 0.73%, 1.02%, and the operation recovery of rare earth ore concentrate and fluorite concentrate is respectively to 3.68%, 3.46%.
2) separation of mix-froth
As shown in Figure 2, be selected reagent removal process chart in the present invention.Mix-froth is carried out to reagent removal, obtain the first rareearth enriching material and the first fluorite enriched substance.The mode that reagent removal adopts mechanical reagent removal and washing reagent removal to combine, it is the selected reagent removal of flotation, through six selected (or thick five essences) reagent removals of foam, obtain ore pulp product, it is concentrated through washing that (postprecipitation adds water, remove supernatant concentration) obtain the first rareearth enriching material, and another froth pulp, obtain the first fluorite enriched substance through washing reagent removal.Every grade adds the waterglass of varying number, and front triple cleaning respectively adds 15ml waterglass, and rear triple cleaning respectively adds 10ml waterglass, and every grade of reinforced dry weight when selected is 250 grams.Wherein, the productive rate of the first rareearth enriching material is that 70.33%(is 44.3% to the productive rate of former total mine tailing), the grade of REO is 13.00%, its operation recovery is 82%; The productive rate of the first fluorite enriched substance is that 29.67%(is 18.74% to the productive rate of former total mine tailing), the grade of fluorite is 6.80%, its operation recovery is 18%.
As shown in Figure 3, be the separation process figure of mix-froth.The first fluorite enriched substance is washed to concentrated (postprecipitation adds water, remove supernatant concentration), obtain the second rareearth enriching material and the second fluorite enriched substance, wherein, the productive rate of the second rareearth enriching material is that 43.8%(is 8.3% to the productive rate of former total mine tailing), the grade of REO is 14.9%, and its operation recovery is 90.6%; The productive rate of the second fluorite enriched substance is that 56.2%(is 10.4% to the productive rate of former total mine tailing), the grade of fluorite is 1.13%, its operation recovery is 9.40%.
In the time that in the first rareearth enriching material, iron content is greater than 3%, the first rareearth enriching material is carried out to strong magnetic deferrization, Surface field intensity is below 1T, obtains the 3rd rareearth enriching material and iron enriched substance, iron enriched substance is returned to mix and is roughly selected.Wherein, the productive rate of the 3rd rareearth enriching material is that 52.4%(is 33.1% to the productive rate of former total mine tailing), the grade of REO is 13.26%, its operation recovery is 84%; The productive rate of iron enriched substance is that 17.9%(is 11.2% to the productive rate of former total mine tailing), the grade of REO is 7.35%, its operation recovery is 16.0%.
3) flotation of rareearth enriching material
Carry out flotation using the second rareearth enriching material and the 3rd rareearth enriching material as total rare earth (TRE) enriched substance (when in the first rareearth enriching material when iron content≤3%, using the first rareearth enriching material and the 3rd rareearth enriching material as total rare earth (TRE) enriched substance), the flotation of rareearth enriching material comprises that one roughing, secondary scan and triple cleaning.
Total rare earth (TRE) enriched substance is roughly selected, and the grade that total rare earth (TRE) enriched substance is 41.4%, REO to the productive rate of former total mine tailing is 14.57%.Add waterglass 13ml, lignin 2ml, collecting agent 19ml, foaming agent is No. 2 oil, and addition is 3～4 of 10ml needle tubings, controls that to roughly select temperature be 45 DEG C, obtains roughly selecting rare earth ore concentrate and roughly selects rare-earth tailing, and roughly selecting rare earth ore concentrate, to proceed the first order selected.
To roughly select rare-earth tailing and carry out the first order and scan, controlling and scanning temperature is 33 DEG C, adds waterglass 5ml, and collecting agent 16ml obtains that the first order is scanned rare earth ore concentrate and the first order is scanned rare-earth tailing, and the first order is scanned rare earth ore concentrate and returned and roughly select.
The first order is scanned to rare-earth tailing and carry out the second level and scan, controlling and scanning temperature is 33 DEG C, adds waterglass 7ml, and collecting agent 18ml, must arrive the second level and scan rare earth ore concentrate and the 3rd fluorite enriched substance, and the second level is scanned rare earth ore concentrate and returned to the first order and scan.The productive rate of the 3rd fluorite enriched substance is that 78.30%(is 32.42% to the productive rate of former total mine tailing), the grade of fluorite is 1.79%, its operation recovery is 9.61%.
To roughly select rare earth ore concentrate and carry out selectedly, controlling selected temperature is 33 DEG C, wherein, and the selected waterglass 5ml that adds of the first order, lignin 5ml and collecting agent 16ml; During the selected and third level in the second level is selected, all add waterglass 5ml, lignin 2ml and collecting agent 11ml; Every one-level selected all outputs rare earth ore concentrate and rare-earth tailing, rare-earth tailing all returns to upper level flotation, and rare earth ore concentrate is as the raw material of next stage.
Reach after balance through 10 times, obtain result of the test, the rare earth ore concentrate productive rate finally obtaining is that 21.7%(is 8.98% to the productive rate of former total mine tailing), the grade of REO is 60.72%, its operation recovery is 90.39%.
4) flotation of fluorite enriched substance
The second fluorite enriched substance and the 3rd fluorite enriched substance are carried out to flotation as total fluorite enriched substance, more than the amount of total fluorite enriched substance needs 150g, control iron in total fluorite enriched substance and content of rare earth below 2%, flotation temperature is room temperature, and PH is 11～12.The flotation of fluorite enriched substance comprises that one roughing, secondary scan with 6 times selected.
When iron content is greater than 3% in total fluorite enriched substance, under the condition that is 0.2T～0.8T in Surface field intensity, carry out deferrization.
Total fluorite enriched substance is roughly selected, and total fluorite enriched substance is 42.82% to the productive rate of former total mine tailing, and the grade of fluorite is 27.5%.Every 150g adds sodium carbonate 4ml, waterglass 16ml, and oleic acid 8ml, obtains roughly selecting fluorite concentrate and roughly select fluorite mine tailing, and roughly selecting fluorite concentrate, to proceed the first order selected.
To roughly select fluorite mine tailing and carry out the first order and scan, and add 6ml waterglass, 12ml oleic acid, obtains that the first order is scanned fluorite concentrate and the first order is scanned fluorite mine tailing, and the first order is scanned fluorite concentrate and returned and roughly select.
The first order is scanned to fluorite mine tailing and carry out the second level and scan, add 8ml oleic acid, must arrive the second level and scan fluorite concentrate and true tailings, the second level is scanned fluorite concentrate and is returned to the first order and scan.The productive rate of true tailings is 47%, and detecting content of fluoride ion is 4.95%, and the grade of fluorite is 10.16%, and its operation recovery is 8.61%.
To roughly select fluorite concentrate carries out selected, wherein the first order is selected adds 14ml waterglass in selected to the fourth stage, level V is selected adds 8ml waterglass and 3ml oleic acid in selected to the 6th grade, every one-level selected all outputs fluorite concentrate and fluorite mine tailing, fluorite mine tailing all returns to upper level flotation, and fluorite concentrate is as the raw material of next stage.The productive rate of the fluorite concentrate finally obtaining is that 53%(is 22.7% to the productive rate of former total mine tailing), detecting content of fluoride ion is 46.55%, and the grade of fluorite is 95.58%, and its operation recovery is 91.39%.
When in the fluorite concentrate finally obtaining, when iron content is greater than 1%, under the condition that is 0.6T～1.0T, iron falls in Surface field intensity.
In the time that in the fluorite concentrate finally obtaining, calcium oxide content is greater than 1%, the chlorohydric acid pickling that is 5% through solute mass fraction by it, solid-liquid volume ratio is 1:10,60～90 DEG C of temperature, 10 minutes time, measure the proper extension time when large, finally obtain high-grade fluorite concentrate.The productive rate of high-grade fluorite concentrate is that 49.80%(is 21.6% to the productive rate of former total mine tailing), detecting content of fluoride ion is 47.35%, the grade of REO and fluorite is respectively 0.61%, 97.22%, and the operation recovery of rare earth ore concentrate and fluorite concentrate is respectively to 2.40%, 86.82%.
Embodiment 3
In the present embodiment, the process that improves the mine tailing middle rare earth rate of recovery and fluorite grade comprises the following steps:
1) bulk flotation
As shown in Figure 1, be the flow chart of bulk flotation technique, in bulk flotation technique, pH is 10～11, temperature is 28 DEG C.Bulk flotation comprises that one roughing, secondary scan with four times selected.
Be more than 7.00% by REO grade, fluorite grade is that more than 11.5% Bayan Obo mine tailing 250g roughly selects, and adds while stirring Na
2cO
329ml, waterglass 21ml, collecting agent 49ml, obtains roughly selecting concentrate and rougher tailings, and roughly selecting concentrate, to proceed the first order selected.
Rougher tailings is carried out to ore grinding, and granularity reaches-200 orders and accounts for more than 96.8%.
Mine tailing after ore grinding is carried out to the first order and scan, add waterglass 12ml, collecting agent 18ml, obtains first order scavenger concentrate and the first order and scans mine tailing, and first order scavenger concentrate returns next time to be roughly selected.
The first order is scanned to mine tailing and carry out the second level and scan, add collecting agent 12ml, obtain second level scavenger concentrate and mix mine tailing, second level scavenger concentrate returns to ore grinding next time, and mixing mine tailing is discharged to Tailings Dam.
To roughly select concentrate, to carry out the first order selected, adds 16ml waterglass, obtains the selected concentrate of the first order and first order cleaner tailings, and first order cleaner tailings returns next time to be roughly selected.
Selected first order concentrate is carried out to the second level selected, add 9ml waterglass, obtain the selected concentrate in the second level and second level cleaner tailings, it is selected that second level cleaner tailings returns to the first order.
Selected second level concentrate is carried out to the third level selected, add 9ml waterglass, obtain the selected concentrate of the third level and third level cleaner tailings, it is selected that third level cleaner tailings returns to the second level.
Selected third level concentrate is carried out to the fourth stage selected, add 7ml waterglass, obtain mix-froth and fourth stage cleaner tailings, it is selected that fourth stage cleaner tailings returns to the third level, and mix-froth is proceeded separating technology.
Can reach balance through 30 closed-circuit tests, wherein, in the mix-froth obtaining, the productive rate of mix-froth is 63.06%, the grade of REO and fluorite is respectively 11.21%, 16.90%, and the operation recovery of rare earth ore concentrate and fluorite concentrate is respectively to 96.32%, 96.54%; In the mixing mine tailing obtaining, the productive rate that mixes mine tailing is that the grade of 36.94%, REO and fluorite is respectively 0.73%, 1.02%, and the operation recovery of rare earth ore concentrate and fluorite concentrate is respectively to 3.68%, 3.46%.
2) separation of mix-froth
As shown in Figure 2, be selected reagent removal process chart in the present invention.Mix-froth is carried out to reagent removal, obtain the first rareearth enriching material and the first fluorite enriched substance.The mode that reagent removal adopts mechanical reagent removal and washing reagent removal to combine, it is the selected reagent removal of flotation, through six selected (or thick five essences) reagent removals of foam, obtain ore pulp product, it is concentrated through washing that (postprecipitation adds water, remove supernatant concentration) obtain the first rareearth enriching material, and another froth pulp, obtain the first fluorite enriched substance through washing reagent removal.Every grade adds the waterglass of varying number, and front triple cleaning respectively adds 15ml waterglass, and rear triple cleaning respectively adds 10ml waterglass, and every grade of reinforced dry weight when selected is 250 grams.Wherein, the productive rate of the first rareearth enriching material is that 70.33%(is 44.3% to the productive rate of former total mine tailing), the grade of REO is 13.00%, its operation recovery is 82%; The productive rate of the first fluorite enriched substance is that 29.67%(is 18.74% to the productive rate of former total mine tailing), the grade of fluorite is 6.80%, its operation recovery is 18%.
As shown in Figure 3, be the separation process figure of mix-froth.The first fluorite enriched substance is washed to concentrated (postprecipitation adds water, remove supernatant concentration), obtain the second rareearth enriching material and the second fluorite enriched substance, wherein, the productive rate of the second rareearth enriching material is that 43.8%(is 8.3% to the productive rate of former total mine tailing), the grade of REO is 14.9%, and its operation recovery is 90.6%; The productive rate of the second fluorite enriched substance is that 56.2%(is 10.4% to the productive rate of former total mine tailing), the grade of fluorite is 1.13%, its operation recovery is 9.40%.
In the time that in the first rareearth enriching material, iron content is greater than 3%, the first rareearth enriching material is carried out to strong magnetic deferrization, Surface field intensity is below 1T, obtains the 3rd rareearth enriching material and iron enriched substance, iron enriched substance is returned to mix and is roughly selected.Wherein, the productive rate of the 3rd rareearth enriching material is that 52.4%(is 33.1% to the productive rate of former total mine tailing), the grade of REO is 13.26%, its operation recovery is 84%; The productive rate of iron enriched substance is that 17.9%(is 11.2% to the productive rate of former total mine tailing), the grade of REO is 7.35%, its operation recovery is 16.0%.
3) flotation of rareearth enriching material
Carry out flotation using the second rareearth enriching material and the 3rd rareearth enriching material as total rare earth (TRE) enriched substance (when in the first rareearth enriching material when iron content≤3%, using the first rareearth enriching material and the 3rd rareearth enriching material as total rare earth (TRE) enriched substance), the flotation of rareearth enriching material comprises that one roughing, secondary scan and triple cleaning.
Total rare earth (TRE) enriched substance is roughly selected, and the grade that total rare earth (TRE) enriched substance is 41.4%, REO to the productive rate of former total mine tailing is 14.57%.Add waterglass 10ml, lignin 5ml, collecting agent 16ml, foaming agent is No. 2 oil, and addition is 3～4 of 10ml needle tubings, controls that to roughly select temperature be 38 DEG C, obtains roughly selecting rare earth ore concentrate and roughly selects rare-earth tailing, and roughly selecting rare earth ore concentrate, to proceed the first order selected.
To roughly select rare-earth tailing and carry out the first order and scan, controlling and scanning temperature is 37 DEG C, adds waterglass 8ml, and collecting agent 13ml obtains that the first order is scanned rare earth ore concentrate and the first order is scanned rare-earth tailing, and the first order is scanned rare earth ore concentrate and returned and roughly select.
The first order is scanned to rare-earth tailing and carry out the second level and scan, controlling and scanning temperature is 37 DEG C, adds waterglass 4ml, and collecting agent 19ml, must arrive the second level and scan rare earth ore concentrate and the 3rd fluorite enriched substance, and the second level is scanned rare earth ore concentrate and returned to the first order and scan.The productive rate of the 3rd fluorite enriched substance is that 78.30%(is 32.42% to the productive rate of former total mine tailing), the grade of fluorite is 1.79%, its operation recovery is 9.61%.
To roughly select rare earth ore concentrate and carry out selectedly, controlling selected temperature is 37 DEG C, wherein, and the selected waterglass 8ml that adds of the first order, lignin 2ml and collecting agent 14ml; During the selected and third level in the second level is selected, all add waterglass 8ml, lignin 5ml and collecting agent 15ml; Every one-level selected all outputs rare earth ore concentrate and rare-earth tailing, rare-earth tailing all returns to upper level flotation, and rare earth ore concentrate is as the raw material of next stage.
Reach after balance through 15 times, obtain result of the test, the rare earth ore concentrate productive rate finally obtaining is that 21.7%(is 8.98% to the productive rate of former total mine tailing), the grade of REO is 60.72%, its operation recovery is 90.39%.
4) flotation of fluorite enriched substance
The second fluorite enriched substance and the 3rd fluorite enriched substance are carried out to flotation as total fluorite enriched substance, more than the amount of total fluorite enriched substance needs 150g, control iron in total fluorite enriched substance and content of rare earth below 2%, flotation temperature is room temperature, and PH is 11～12.The flotation of fluorite enriched substance comprises that one roughing, secondary scan with 5 times selected.
When iron content is greater than 3% in total fluorite enriched substance, under the condition that is 0.2T～0.8T in Surface field intensity, carry out deferrization.
Total fluorite enriched substance is roughly selected, and total fluorite enriched substance is 42.82% to the productive rate of former total mine tailing, and the grade of fluorite is 27.5%.Every 150g adds sodium carbonate 6ml, waterglass 13ml, and oleic acid 11ml, obtains roughly selecting fluorite concentrate and roughly select fluorite mine tailing, and roughly selecting fluorite concentrate, to proceed the first order selected.
To roughly select fluorite mine tailing and carry out the first order and scan, and add 4ml waterglass, 11ml oleic acid, obtains that the first order is scanned fluorite concentrate and the first order is scanned fluorite mine tailing, and the first order is scanned fluorite concentrate and returned and roughly select.
The first order is scanned to fluorite mine tailing and carry out the second level and scan, add 11ml oleic acid, must arrive the second level and scan fluorite concentrate and true tailings, the second level is scanned fluorite concentrate and is returned to the first order and scan.The productive rate of true tailings is 47%, and detecting content of fluoride ion is 4.95%, and the grade of fluorite is 10.16%, and its operation recovery is 8.61%.
To roughly select fluorite concentrate carries out selected, wherein the first order is selected adds 17ml waterglass in selected to the fourth stage, during level V is selected, add 9ml waterglass and 4ml oleic acid, every one-level selected all outputs fluorite concentrate and fluorite mine tailing, fluorite mine tailing all returns to upper level flotation, and fluorite concentrate is as the raw material of next stage.The productive rate of the fluorite concentrate finally obtaining is that 53%(is 22.7% to the productive rate of former total mine tailing), detecting content of fluoride ion is 46.55%, and the grade of fluorite is 95.58%, and its operation recovery is 91.39%.
When in the fluorite concentrate finally obtaining, when iron content is greater than 1%, under the condition that is 0.6T～1.0T, iron falls in Surface field intensity.
In the time that in the fluorite concentrate finally obtaining, calcium oxide content is greater than 1%, the chlorohydric acid pickling that is 5% through solute mass fraction by it, solid-liquid volume ratio is 1:10,60～90 DEG C of temperature, 10 minutes time, measure the proper extension time when large, finally obtain high-grade fluorite concentrate.The productive rate of high-grade fluorite concentrate is that 49.80%(is 21.6% to the productive rate of former total mine tailing), detecting content of fluoride ion is 47.35%, the grade of REO and fluorite is respectively 0.61%, 97.22%, and the operation recovery of rare earth ore concentrate and fluorite concentrate is respectively to 2.40%, 86.82%.
Claims (10)
1. a process that improves the mine tailing middle rare earth rate of recovery and fluorite grade, is characterized in that, comprises the following steps:
1) by mine tailing raw material through one-level roughly select, multistage scanning with multistage obtain mix-froth after selected and mix mine tailing; Mine tailing raw material obtains roughly selecting concentrate and rougher tailings through roughly selecting, and rougher tailings is scanned and isolated mixing mine tailing, will roughly select concentrate and carry out the selected mix-froth of isolating; The multistage chats of choosing every one-level to obtain with multi-level oil of scanning returns to upper level;
2) described mix-froth is separated and obtain total rare earth (TRE) enriched substance and total fluorite enriched substance;
3) by described total rare earth (TRE) enriched substance through one-level roughly select, multistage scanning with multistage obtain rare earth ore concentrate after selected; Described total rare earth (TRE) enriched substance obtains roughly selecting rare earth ore concentrate and roughly selects rare-earth tailing through roughly selecting, and will roughly select rare-earth tailing and scan, and will roughly select rare earth ore concentrate and carry out the selected rare earth ore concentrate of isolating; The multistage chats of choosing every one-level to obtain with multi-level oil of scanning returns to upper level;
4) by described total fluorite enriched substance through one-level roughly select, multistage scanning with multistage obtain fluorite concentrate after selected; Described total fluorite enriched substance obtains roughly selecting fluorite concentrate and roughly select fluorite mine tailing through roughly selecting, and will roughly select fluorite mine tailing and scan and isolate true tailings, will roughly select fluorite concentrate and carry out the selected fluorite concentrate of isolating; The multistage chats of choosing every one-level to obtain with multi-level oil of scanning returns to upper level.
2. process as claimed in claim 1, is characterized in that, in step 1), pH is 10～11, and temperature is 25 DEG C～30 DEG C, comprises that one roughing, secondary scan with four times selected; In roughly selecting, in every 250g mine tailing raw material, add Na
2cO
329～32ml, waterglass 18～21ml, collecting agent 49～52ml, obtains roughly selecting concentrate and rougher tailings; To after rougher tailings ore grinding, enter and scan, the first order adds 9～12ml waterglass and 18～21ml collecting agent in scanning, and the second level is scanned and added 9～12ml collecting agent; To roughly select concentrate and carry out selectedly, the first order is selected to selected middle 13～16ml, 9～12ml, 9～12ml, the 4～7ml waterglass of adding respectively of the fourth stage.
3. process as claimed in claim 1, is characterized in that step 2) described in after mix-froth reagent removal, obtain the first rareearth enriching material and the first fluorite enriched substance; The first fluorite enriched substance is washed and concentrated, obtain the second rareearth enriching material and the second fluorite enriched substance; In the time that iron content is greater than 3% in described the first rareearth enriching material, by described the first rareearth enriching material deferrization, obtain the 3rd rareearth enriching material;
In step 3), roughly select after rare-earth tailing is scanned and isolate the 3rd fluorite enriched substance; Using the second fluorite enriched substance and the 3rd fluorite enriched substance as total fluorite enriched substance; When in described the first rareearth enriching material when iron content > 3%, using the second rareearth enriching material and the 3rd rareearth enriching material as total rare earth (TRE) enriched substance; When in the first rareearth enriching material when iron content≤3%, using the first rareearth enriching material and the 3rd rareearth enriching material as total rare earth (TRE) enriched substance.
4. process as claimed in claim 3, is characterized in that step 2) described in reagent removal comprise six times selected, front triple cleaning respectively adds 15ml waterglass, rear triple cleaning respectively adds 10ml waterglass, every grade of reinforced dry weight when selected is 250 grams.
5. process as claimed in claim 1, is characterized in that, step 3) comprises that one roughing, secondary scan and triple cleaning, and wherein, roughly selecting temperature is 38～45 DEG C, scans with selected temperature and is 33～37 DEG C; In roughly selecting, add waterglass 10～13ml, lignin 2～5ml, collecting agent 16～19ml, foaming agent is No. 2 oil, addition is 3～4 of 10ml needle tubings, obtains roughly selecting rare earth ore concentrate and roughly selects rare-earth tailing; To roughly select rare-earth tailing and scan, the first order adds 5～8ml waterglass and 13～16ml collecting agent in scanning, and the second level is scanned and added 4～7ml waterglass and 18～20ml collecting agent; To roughly select rare earth ore concentrate carry out selected, the selected waterglass 5～8ml that adds of the first order, lignin 2～5ml and collecting agent 14～16ml; During the selected and third level in the second level is selected, all add waterglass 5～8ml, lignin 2～5ml and collecting agent 11～15ml.
6. process as claimed in claim 1, is characterized in that, when iron content is greater than 3% in total fluorite enriched substance, carries out deferrization in Surface field intensity under the condition that is 0.2T～0.8T.
7. the process as described in claim 1 or 6, is characterized in that, in step 4), pH is 11～12, and temperature is room temperature, comprises that one roughing, secondary scan with 5～8 times selected; In roughly selecting, add Na
2cO
34～6ml, waterglass 13～16ml, oleic acid 8～11ml, obtains roughly selecting fluorite concentrate and roughly selects fluorite mine tailing; To roughly select fluorite mine tailing and scan, the first order adds 4～6ml waterglass and 10～12ml oleic acid in scanning, and the second level is scanned and added 8～11ml oleic acid; To roughly select fluorite concentrate and carry out selectedly, the first order is selected adds 14～17ml waterglass in selected to the fourth stage, and level V is selected adds 8～10ml waterglass and 3～5ml oleic acid in selected to the 8th grade.
8. process as claimed in claim 7, is characterized in that, described waterglass and Na
2cO
3solute mass fraction be 5%; The solute mass fraction of described collecting agent and described oleic acid is 2%.
9. process as claimed in claim 1, is characterized in that, in the time that iron content is greater than 1% in described fluorite concentrate, under the condition that is 0.6T～1.0T, falls iron in Surface field intensity.
10. process as claimed in claim 1, it is characterized in that, in the time that in described fluorite concentrate, calcium oxide content is greater than 1%, the chlorohydric acid pickling that is 5% through solute mass fraction by it, solid-liquid volume ratio is 1:10, temperature is 60～90 DEG C, and the time is more than 10 minutes, and obtaining grade is more than 97% fluorite concentrate.
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| CN108480037B (en) * | 2018-04-19 | 2020-03-06 | 东北大学 | Beneficiation method for recovering iron, rare earth, fluorite and niobium from iron tailings of associated multi-metal minerals |
| CN108580023B (en) * | 2018-04-19 | 2020-03-10 | 东北大学 | Multi-component recycling and beneficiation method for iron tailings associated with rare earth minerals |
| CN108787159A (en) * | 2018-05-22 | 2018-11-13 | 北京矿冶科技集团有限公司 | A kind of synthetical recovery beneficiation method of low-grade uranium-bearing polymetallic ore |
| CN108787159B (en) * | 2018-05-22 | 2020-09-25 | 北京矿冶科技集团有限公司 | Comprehensive recovery beneficiation method for low-grade uranium-bearing polymetallic ore |
| CN109482360A (en) * | 2018-11-20 | 2019-03-19 | 中国地质科学院矿产综合利用研究所 | Mineral processing technology of rare earth, fluorite and barite associated ore |
| CN110860369A (en) * | 2019-12-06 | 2020-03-06 | 四川江铜稀土有限责任公司 | Beneficiation method for recovering ultralow-grade rare earth and fluorite from rare earth tailings |
| CN111644270A (en) * | 2020-06-15 | 2020-09-11 | 广东省资源综合利用研究所 | Beneficiation process for recovering fluorite from tailings |
| CN112604817A (en) * | 2020-11-27 | 2021-04-06 | 湖南柿竹园有色金属有限责任公司 | Recycling and ore dressing process for tailings containing high-silicon gangue and high-calcium associated fluorite |
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