CN102500465B - Benefication method for bastnaesite - Google Patents
Benefication method for bastnaesite Download PDFInfo
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- CN102500465B CN102500465B CN201110373712.4A CN201110373712A CN102500465B CN 102500465 B CN102500465 B CN 102500465B CN 201110373712 A CN201110373712 A CN 201110373712A CN 102500465 B CN102500465 B CN 102500465B
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000012141 concentrate Substances 0.000 claims abstract description 124
- 238000005188 flotation Methods 0.000 claims abstract description 54
- 238000007885 magnetic separation Methods 0.000 claims abstract description 51
- 238000000227 grinding Methods 0.000 claims abstract description 16
- 230000005484 gravity Effects 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 54
- 238000004140 cleaning Methods 0.000 claims description 35
- 238000010926 purge Methods 0.000 claims description 30
- 229910052684 Cerium Inorganic materials 0.000 claims description 21
- 239000002516 radical scavenger Substances 0.000 claims description 20
- 239000004088 foaming agent Substances 0.000 claims description 14
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- HBROZNQEVUILML-UHFFFAOYSA-N salicylhydroxamic acid Chemical compound ONC(=O)C1=CC=CC=C1O HBROZNQEVUILML-UHFFFAOYSA-N 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 6
- 235000019353 potassium silicate Nutrition 0.000 claims description 6
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 4
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 238000011282 treatment Methods 0.000 claims description 4
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 3
- 239000012188 paraffin wax Substances 0.000 claims description 3
- 239000000344 soap Substances 0.000 claims description 3
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 3
- 229910052761 rare earth metal Inorganic materials 0.000 abstract description 52
- 150000002910 rare earth metals Chemical class 0.000 abstract description 52
- 238000011084 recovery Methods 0.000 abstract description 31
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 7
- 239000011707 mineral Substances 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract description 6
- 239000000428 dust Substances 0.000 abstract description 4
- 229910001404 rare earth metal oxide Inorganic materials 0.000 abstract 2
- 238000003912 environmental pollution Methods 0.000 abstract 1
- 230000002000 scavenging effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 8
- 230000008569 process Effects 0.000 description 3
- 239000010802 sludge Substances 0.000 description 2
- MPPQGYCZBNURDG-UHFFFAOYSA-N 2-propionyl-6-dimethylaminonaphthalene Chemical compound C1=C(N(C)C)C=CC2=CC(C(=O)CC)=CC=C21 MPPQGYCZBNURDG-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 229920001732 Lignosulfonate Polymers 0.000 description 1
- 229910052641 aegirine Inorganic materials 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 description 1
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 1
- 239000010428 baryte Substances 0.000 description 1
- 229910052601 baryte Inorganic materials 0.000 description 1
- 229910052626 biotite Inorganic materials 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- -1 coronadite Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000021321 essential mineral Nutrition 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000010436 fluorite Substances 0.000 description 1
- 235000019580 granularity Nutrition 0.000 description 1
- 229910052888 grunerite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910001608 iron mineral Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000006148 magnetic separator Substances 0.000 description 1
- 229910052652 orthoclase Inorganic materials 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000010334 sieve classification Methods 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000003784 tall oil Substances 0.000 description 1
Abstract
The invention relates to a benefication method for bastnaesite. The benefication method for the bastnaesite is characterized by comprising the following steps: grinding and classifying the raw ore; performing magnetic separation to obtain magnetic concentrates and tailings; performing gravity separation on each grade of strong magnetic concentrate by using a table concentrator respectively to obtain table concentrates, table middlings and table tailings; combining each grade of table concentrate and table middling and performing high-gradient magnetic separation to obtain magnetic bastnaesite concentrates and magnetic middlings; combining the magnetic middlings and the table tailings; grinding the ores; performing closed-circuit flotation comprising one-time rough concentration, three-time scavenging and three-time concentration; and returning the middlings sequentially to obtain flotation bastnaesite concentrates and flotation tailings. The magnetic bastnaesite concentrates and the flotation bastnaesite concentrates are rare-earth total concentrates; the rare earth oxide (REO) grade of the rare earth is more than 65 percent; and the total recovery rate reaches 75 to 86 percent. According to the benefication method for the bastnaesite, fully-wet non-dust operation is adopted; separation efficiency is high; occupied area is small; production is performed continuously; flotation is performed at normal temperature; and environmental pollution is avoided. The benefication method for the bastnaesite is applicable to benefication of light rare earth minerals existing in the form of the bastnaesite.
Description
Technical field
The present invention relates to a kind of beneficiation method, particularly a kind of beneficiation method of bastnaesite.
Background technology
Bastnaesite is one of main light rare earth mineral.It is all single bastnaesite mineral deposit that Rare Earth Mine difficult to understand, Turkey Bei Yili Frank Cuhel Rare Earth Mine and Sichuan Province China maoniuping rare-earth mineral, the large syneclise Rare Earth Mine in Dechang, Sichuan and Weishan, Shandong Rare Earth Mine etc. are all clung to by the awns court of a feudal ruler Paasche Rare Earth Mine of the U.S., Vietnam, and rare earth REO grade is 1 ~ 14%.At present, the main method of processing recovery bastnaesite comprises gravity treatment, magnetic separation, flotation and integrated processes thereof.
Pradip and D.W.Fuerstenau(The Role of Inorganic and Organic Reagents in the Flotation Separation of Rare-Earth Ores, < < International Journal of Mineral Processing, > > Vol.32, 1-22 (1991)) a kind of bastnaesite method for floating proposed, being the rare earth REO grade raw ore ore ore grinding that is 7% accounts for 80% to fineness-0.15mm, at 90 ℃ of temperature, size mixing for six times, add successively adjusting agent sodium carbonate, prodan, ammonium lignin sulfonate, collecting agent tall oil, at pH, be under 8.8 conditions, to carry out flotation operation.Through roughly selecting, four selected closed circuit flow processs, have finally obtained average rare earth REO grade 60 ~ 63%, the fluoro-carbon-cerium ore concentrate of overall recovery 65 ~ 70%.The flotation collector that the method is used is selectively poor, selective in order to strengthen, and needs at high temperature to size mixing for a long time processing, and not only method flow is long, and energy consumption cost is high.
A kind of rare-earth mineral coarse and fine separation method is disclosed in China Patent Publication No. CN1403203: raw ore ore grinding accounts for 60 ~ 95% to-0.15mm, sends into table concentration, sub-elects coarse grain bastnaesite concentrate, shaking table chats and shaking table mine tailing.Shaking table chats drying or dry after carry out dry type magnetic separation, obtain three kinds of products and be middle grain bastnaesite concentrate, magnetic tailing and iron mineral.Sieve classification is carried out in magnetic tailing and the merging of shaking table mine tailing, remove coarse grain gangue, intergrowth chats secondary grinding is accounted for to 75 ~ 85% to-0.074mm, Selective desliming is carried out in ore pulp after levigate and undersize merging, sand setting after desliming is under 30 ~ 50 ℃ of conditions in temperature, ore deposit 0.4 ~ 1.8kg waterglass per ton is given in interpolation relatively successively, 0.8 ~ 3kg hydroximic acid collecting agent, and 30 ~ 300g supplementary catching agent and 20 ~ 150g foaming agent carry out flotation.Flotation obtains flotation concentrate and two kinds of products of flotation tailing.The final comprehensive rare earth REO of rare earth ore concentrate grade is greater than 62%, rare earth overall recovery 80 ~ 85%.The method can obtain in laboratory compared with the rare earth ore concentrate of high-grade and the rate of recovery; but in large-scale production, exist roughing table floor space large; the shortcomings such as batch (-type) oven dry sample ore and dry type magnetic separation dust pollution are large, and flotation needs heat treatment, production management inconvenience.
Xiong Shuqing (Combined Gravity-Flotation flowsheet for A Rara Earth Ore in Sichuan experimental study, < < mineral products comprehensive utilization > >, 2002(5), 3-6) gravity treatment-flotation combined method proposed.Ore, after the desliming of ore grinding-classification-cyclone, enters gravity table operation, obtains table concentrate, shaking table chats and shaking table mine tailing.Shaking table chats is again after ore grinding, flotation processing.Finally obtained the comprehensive rare earth REO of rare earth ore concentrate grade 61.18%, the index of overall recovery 75.74%.The method adopts shaking table as gravity treatment roughing separation equipment equally, and area of mill site is large, operation inconvenience, and also the sludge Rare-Earth Content removing is high, and loss is large, causes overall recovery on the low side.
Summary of the invention
The object of the present invention is to provide a kind of beneficiation method of bastnaesite, adopt that a kind of flow process is simple, occupation area of equipment is little, production is continuous, without the method for dust work, easy to operate, the flotation that do not need to heat, realize the recovery of bastnaesite.
Beneficiation method of the present invention is comprised of following steps:
1. grind grading: tcrude ore ore grinding is to-1.0mm, be classified as-1.0+0.4mm ,-0.4+0.074mm and-tri-grades of 0.074mm;
2. raw ore magnetic separation: magnetic separation under the condition that is 1.0T in background magnetic field field intensity, obtains high intensity magnetic separation concentrate and high intensity magnetic separation mine tailing;
3. gravity treatment: each grade high intensity magnetic separation concentrate carries out respectively table concentration, obtains table concentrate, shaking table chats and shaking table mine tailing;
4. table concentrate and chats magnetic separation: merging each grade table concentrate and shaking table chats, is Wet-type high gradient magnetic separation under 0.5 ~ 0.8T condition at specified background lectromagnetism field, obtains magnetic separation fluoro-carbon-cerium ore concentrate and magnetic middling ore;
5. magnetic middling ore and the flotation of shaking table mine tailing: merge magnetic middling ore and shaking table mine tailing, ore grinding accounts for 50 ~ 75% to-0.043mm again, pulp density is 25 ~ 35%, by raw ore per ton, add successively 1000 ~ 3000 grams of adjusting agents to size mixing, 3000 ~ 5000 grams of collecting agents and No. 2 oil of 10 ~ 100 grams of foaming agents, carry out roughing flotation, obtains and roughly select concentrate and rougher tailings;
Rougher tailings pulp density is 20 ~ 35%, adds 1000 ~ 1500 grams of collecting agents, No. 2 oil of 5 ~ 40 grams of foaming agents to carry out once purging selection, obtains once purging selection concentrate and once purging selection mine tailing, and once purging selection concentrate is back to roughing flotation operation and forms closed cycle;
Once purging selection mine tailing pulp density is 20 ~ 35%, adds 400 ~ 800 grams of collecting agents to carry out secondary and scans; Obtain secondary scavenger concentrate and secondary and scan mine tailing, secondary scavenger concentrate is back to once purging selection operation and forms closed cycle;
It is 20 ~ 35% that secondary is scanned mine tailing pulp density, adds 200 ~ 500 grams of collecting agents to carry out three times and scans, and obtains three scavenger concentrates and flotation tailing, and three scavenger concentrates are back to secondary and scan operation and form closed cycle;
Roughly selecting concentrate pulp concentration is 10 ~ 30%, adds 400 ~ 1000 grams of adjusting agents to carry out primary cleaning; Obtain primary cleaning concentrate and primary cleaner tailing, primary cleaner tailing is back to roughing flotation operation shape
Become closed cycle;
Primary cleaning concentrate pulp concentration is 10 ~ 25%, adds 200 ~ 800 grams of adjusting agents to carry out recleaning; Obtain recleaning concentrate and recleaning mine tailing, recleaning mine tailing is back to primary cleaning operation and forms closed cycle;
Recleaning concentrate pulp concentration is 5 ~ 20%, adds 100 ~ 400 grams of adjusting agents to carry out triple cleaning, obtains flotation fluoro-carbon-cerium ore concentrate and triple cleaning mine tailing, and triple cleaning mine tailing is back to recleaning operation and forms closed cycle.Magnetic separation fluoro-carbon-cerium ore concentrate and flotation fluoro-carbon-cerium ore concentrate are the total concentrate of rare earth, and rare earth REO grade is greater than 65%, and overall recovery reaches 75 ~ 86%.
Described adjusting agent is one or more in sodium carbonate, waterglass, aluminum sulfate or calgon.
Described collecting agent is one or more in enuatrol, oxidized paraffin wax soap, Using Salicyl Hydroximic Acid ammonium, Using Salicyl Hydroximic Acid, benzene first hydroximic acid or alkylhydroxamic acid.
Advantage of the present invention is: 1. high gradient wet high-intensity magnetic separation has been realized the double action of throwing tail and desliming, has reduced the mine-supplying quantity of subsequent job, also for subsequent job has been created the interference that good environment, particularly flotation operation have been got rid of sludge; 2. high intensity magnetic separation equipment is as roughing separation equipment, and floor space is little, saves space; 3. dust pollution and the discontinuous problem of production that dry type magnetic separation brings have been eradicated in complete wet magnetic separation; 4. can obtain two kinds of varigrained fluoro-carbon-cerium ore concentrate products, realize the scheme of multi-product; 5. fluoro-carbon-cerium ore concentrate is of high grade, and the rate of recovery is high; 6. flotation does not need to heat, and production cost is low.
The specific embodiment
For a better understanding of the present invention, below in conjunction with embodiment, further illustrate content of the present invention, but content of the present invention is not only confined to embodiment.
Embodiment 1
Select Chinese somewhere rare-earth original ore, essential mineral consists of bastnaesite, barite, fluorite, orthoclase, quartz, receive grunerite, coronadite, biotite, kaolin and aegirine etc.Raw ore rare earth REO grade is 2.89%.Raw ore ore grinding to whole granularities are-1.0mm after classification, acquisition-1.0+0.4mm ,-0.4+0.074mm and-tri-grades of 0.074mm, in background magnetic field field intensity, be with high gradient magnetic separator, once to sort respectively under 1.0T, obtain high intensity magnetic separation concentrate and high intensity magnetic separation mine tailing.The productive rate 6.91% of high intensity magnetic separation rough concentrate-1.0+0.4mm grade, rare earth REO grade 4.73%, the rate of recovery 11.31%; The productive rate 11.88% of-0.4+0.074mm grade, rare earth REO grade 12.83%, the rate of recovery 52.72%; The productive rate 11.21% of-0.074mm grade, rare earth REO grade 7.07%, the rate of recovery 27.44%.High intensity magnetic separation rough concentrate gross production rate is 30.00%, and the mine tailing except 70.00% is thrown in high intensity magnetic separation operation, and rare earth overall recovery reaches 91.47%.Each grade high intensity magnetic separation rough concentrate carries out respectively table concentration, obtains table concentrate, shaking table chats and shaking table mine tailing.Merging after each grade table concentrate and shaking table chats, is under 0.6T, to carry out Wet-type high gradient magnetic separation at specified background lectromagnetism field, obtains magnetic separation fluoro-carbon-cerium ore concentrate and magnetic middling ore, magnetic separation fluoro-carbon-cerium ore concentrate rare earth REO grade 65.09%, the rate of recovery 67.56%.Merge magnetic middling ore and each grade shaking table mine tailing, ore grinding accounts for 65% to-0.043mm again, flotation operation roughly select, scan with the adjusting agent of selected use the sodium carbonate that is weight ratio 5:6:1: waterglass: calgon, the Using Salicyl Hydroximic Acid that collecting agent is 3:2: benzene first hydroximic acid, foaming agent is No. 2 oil.Pulp density is 30%, by raw ore per ton, adds successively 2000 grams of adjusting agents to size mixing, and 3500 grams of collecting agents and 60 grams of foaming agents carry out roughing flotation, obtains rougher tailings and roughly selects concentrate.Rougher tailings pulp density is 28%, adds 1000 grams of collecting agents, No. 2 oil of 40 grams of foaming agents to carry out once purging selection, obtains once purging selection concentrate and once purging selection mine tailing, and once purging selection concentrate is back to roughing flotation operation and forms closed cycle; Once purging selection mine tailing pulp density is 25%, adds 400 grams of collecting agents to carry out secondary and scans, and obtains secondary scavenger concentrate and secondary and scans mine tailing, and secondary scavenger concentrate is back to once purging selection operation and forms closed cycle; It is 22% that secondary is scanned mine tailing pulp density, adds 200 grams of collecting agents to carry out three times and scans, and obtains three scavenger concentrates and flotation tailing, and three scavenger concentrates are back to secondary and scan operation and form closed cycle; Roughly selecting concentrate pulp concentration is 20%, adds 500 grams of adjusting agents to carry out primary cleaning, obtains primary cleaning concentrate and primary cleaner tailing, and primary cleaner tailing is back to roughing flotation operation and forms closed cycle; Primary cleaning concentrate pulp concentration is 15%, adds 300 grams of adjusting agents to carry out recleaning, obtains recleaning concentrate and recleaning mine tailing, and recleaning mine tailing is back to primary cleaning operation and forms closed cycle; Recleaning concentrate pulp concentration is 10%, adds 100 grams of adjusting agents to carry out triple cleaning, obtains flotation fluoro-carbon-cerium ore concentrate and triple cleaning mine tailing, and triple cleaning mine tailing is back to recleaning operation and forms closed cycle.Flotation fluoro-carbon-cerium ore concentrate productive rate 0.76%, rare earth REO grade 65.11%, the rate of recovery is 17.05%.The average rare earth REO grade 65.08% of the total concentrate of rare earth, overall recovery reaches 84.61%.
Embodiment 2
Raw ore is identical with embodiment 1, and rare earth REO grade is 5.19%.Ore grinding, classification and magnetic separation are with embodiment 1.The productive rate 9.59% of high intensity magnetic separation rough concentrate-1.0+0.4mm grade, rare earth REO grade 12.03%, the rate of recovery 22.23%; The productive rate 9.92% of-0.4+0.074mm grade, rare earth REO grade 20.62%, the rate of recovery 39.43%; The productive rate 11.29% of-0.074mm grade, rare earth REO grade 14.26%, the rate of recovery 31.03%.High intensity magnetic separation rough concentrate gross production rate is 30.81%, and the mine tailing except 69.19% is thrown in high intensity magnetic separation operation, and rare earth overall recovery reaches 92.69%.Each grade high intensity magnetic separation rough concentrate carries out respectively table concentration, obtains table concentrate, shaking table chats and shaking table mine tailing.Merging after each grade table concentrate and shaking table chats, is under 0.5T, to carry out Wet-type high gradient magnetic separation at specified background lectromagnetism field, obtains magnetic separation fluoro-carbon-cerium ore concentrate and magnetic middling ore, magnetic separation fluoro-carbon-cerium ore concentrate rare earth REO grade 66.11%, the rate of recovery 68.44%.Merge magnetic middling ore and each grade shaking table mine tailing, ore grinding accounts for 71% to-0.043mm again, flotation operation roughly select, scan with the adjusting agent of selected use the aluminum sulfate that is weight ratio 1:1: waterglass, collecting agent is the oxidized paraffin wax soap of weight ratio 1:5: Using Salicyl Hydroximic Acid, foaming agent is No. 2 oil.Pulp density is 30%, by raw ore per ton, adds successively 2500 grams of adjusting agents to size mixing, and 4000 grams of collecting agents and 60 grams of foaming agents carry out roughing flotation, obtains rougher tailings and roughly selects concentrate.Rougher tailings pulp density is 25%, adds 1200 grams of collecting agents, No. 2 oil of 40 grams of foaming agents to carry out once purging selection, obtains once purging selection concentrate and once purging selection mine tailing, and once purging selection concentrate is back to roughing flotation operation and forms closed cycle; Once purging selection mine tailing pulp density is 23%, adds 400 grams of collecting agents to carry out secondary and scans, and obtains secondary scavenger concentrate and secondary and scans mine tailing, and secondary scavenger concentrate is back to once purging selection operation and forms closed cycle; It is 22% that secondary is scanned mine tailing pulp density, adds 300 grams of collecting agents to carry out three times and scans, and obtains three scavenger concentrates and flotation tailing, and three scavenger concentrates are back to secondary and scan operation and form closed cycle; Roughly selecting concentrate pulp concentration is 20%, adds 600 grams of adjusting agents to carry out primary cleaning, obtains primary cleaning concentrate and primary cleaner tailing, and primary cleaner tailing is back to roughing flotation operation and forms closed cycle; Primary cleaning concentrate pulp concentration is 15%, adds 400 grams of adjusting agents to carry out recleaning, obtains recleaning concentrate and recleaning mine tailing, and recleaning mine tailing is back to primary cleaning operation and forms closed cycle; Recleaning concentrate pulp concentration is 8%, adds 200 grams of adjusting agents to carry out triple cleaning, obtains flotation fluoro-carbon-cerium ore concentrate and triple cleaning mine tailing, and triple cleaning mine tailing is back to recleaning operation and forms closed cycle.Flotation fluoro-carbon-cerium ore concentrate productive rate 1.33%, rare earth REO grade 65.28%, the rate of recovery is 16.73%.The average rare earth REO grade 65.95% of the total concentrate of rare earth, overall recovery reaches 85.17%.
Embodiment 3
Raw ore is identical with embodiment 1, and rare earth REO grade is 4.01%.Ore grinding, classification and magnetic separation are with embodiment 1.The productive rate 8.88% of high intensity magnetic separation rough concentrate-1.0+0.4mm grade, rare earth REO grade 11.34%, the rate of recovery 25.11%; The productive rate 7.69% of-0.4+0.074mm grade, rare earth REO grade 18.49%, the rate of recovery 35.45%; The productive rate 9.34% of-0.074mm grade, rare earth REO grade 13.26%, the rate of recovery 30.87%.High intensity magnetic separation rough concentrate gross production rate is 25.90%, and the mine tailing except 74.10% is thrown in high intensity magnetic separation operation, and rare earth overall recovery reaches 91.43%.Each grade high intensity magnetic separation rough concentrate carries out respectively table concentration, obtains table concentrate, shaking table chats and shaking table mine tailing.Merging after each grade table concentrate and shaking table chats, is under 0.5T, to carry out Wet-type high gradient magnetic separation at specified background lectromagnetism field, obtains magnetic separation fluoro-carbon-cerium ore concentrate and magnetic middling ore, magnetic separation fluoro-carbon-cerium ore concentrate rare earth REO grade 66.43%, the rate of recovery 68.23%.Merge magnetic middling ore and each grade shaking table mine tailing, then ore grinding accounts for 68% to-0.043mm, roughly selecting, scanning with the adjusting agent of selected use of flotation operation is waterglass, and collecting agent is Using Salicyl Hydroximic Acid ammonium, and foaming agent is No. 2 oil.Pulp density is 30%, by raw ore per ton, adds successively 3000 grams of adjusting agents to size mixing, and 4000 grams of collecting agents and 80 grams of foaming agents carry out roughing flotation, obtains rougher tailings and roughly selects concentrate.Rougher tailings pulp density is 25%, adds 1200 grams of collecting agents, No. 2 oil of 30 grams of foaming agents to carry out once purging selection, obtains once purging selection concentrate and once purging selection mine tailing, and once purging selection concentrate is back to roughing flotation operation and forms closed cycle; Once purging selection mine tailing pulp density is 23%, adds 400 grams of collecting agents to carry out secondary and scans, and obtains secondary scavenger concentrate and secondary and scans mine tailing, and secondary scavenger concentrate is back to once purging selection operation and forms closed cycle; It is 22% that secondary is scanned mine tailing pulp density, adds 300 grams of collecting agents to carry out three times and scans, and obtains three scavenger concentrates and flotation tailing, and three scavenger concentrates are back to secondary and scan operation and form closed cycle; Roughly selecting concentrate pulp concentration is 20%, adds 500 grams of adjusting agents to carry out primary cleaning, obtains primary cleaning concentrate and primary cleaner tailing, and primary cleaner tailing is back to roughing flotation operation and forms closed cycle; Primary cleaning concentrate pulp concentration is 15%, adds 500 grams of adjusting agents to carry out recleaning, obtains recleaning concentrate and recleaning mine tailing, and recleaning mine tailing is back to primary cleaning operation and forms closed cycle; Recleaning concentrate pulp concentration is 10%, adds 100 grams of adjusting agents to carry out triple cleaning, obtains flotation fluoro-carbon-cerium ore concentrate and triple cleaning mine tailing, and triple cleaning mine tailing is back to recleaning operation and forms closed cycle.Flotation fluoro-carbon-cerium ore concentrate productive rate 1.02%, rare earth REO grade 65.08%, the rate of recovery is 15.56%.The average rare earth REO grade 66.16% of the total concentrate of rare earth, overall recovery reaches 84.79%.
Claims (3)
1. a beneficiation method for bastnaesite, is characterized in that being comprised of following steps:
1. grind grading: tcrude ore ore grinding is to-1.0mm, be classified as-1.0+0.4mm ,-0.4+0.074mm and-tri-grades of 0.074mm;
2. raw ore magnetic separation: magnetic separation under the condition that is 1.0T in background magnetic field field intensity, obtains high intensity magnetic separation concentrate and high intensity magnetic separation mine tailing;
3. gravity treatment: each grade high intensity magnetic separation concentrate carries out respectively table concentration, obtains table concentrate, shaking table chats and shaking table mine tailing;
4. table concentrate and chats magnetic separation: merging each grade table concentrate and shaking table chats, is Wet-type high gradient magnetic separation under 0.5 ~ 0.8T condition at specified background lectromagnetism field, obtains magnetic separation fluoro-carbon-cerium ore concentrate and magnetic middling ore;
5. magnetic middling ore and the flotation of shaking table mine tailing: merge magnetic middling ore and shaking table mine tailing, ore grinding accounts for 50 ~ 75% to-0.043mm again, pulp density is 25 ~ 35%, by raw ore per ton, add successively 1000 ~ 3000 grams of adjusting agents to size mixing, 3000 ~ 5000 grams of collecting agents and No. 2 oil of 10 ~ 100 grams of foaming agents, carry out roughing flotation, obtains and roughly select concentrate and rougher tailings;
Rougher tailings pulp density is 20 ~ 35%, adds 1000 ~ 1500 grams of collecting agents, No. 2 oil of 5 ~ 40 grams of foaming agents to carry out once purging selection, obtains once purging selection concentrate and once purging selection mine tailing, and once purging selection concentrate is back to roughing flotation operation and forms closed cycle;
Once purging selection mine tailing pulp density is 20 ~ 35%, adds 400 ~ 800 grams of collecting agents to carry out secondary and scans; Obtain secondary scavenger concentrate and secondary and scan mine tailing, secondary scavenger concentrate is back to once purging selection operation and forms closed cycle;
It is 20 ~ 35% that secondary is scanned mine tailing pulp density, adds 200 ~ 500 grams of collecting agents to carry out three times and scans, and obtains three scavenger concentrates and flotation tailing, and three scavenger concentrates are back to secondary and scan operation and form closed cycle;
Roughly selecting concentrate pulp concentration is 10 ~ 30%, adds 400 ~ 1000 grams of adjusting agents to carry out primary cleaning; Obtain primary cleaning concentrate and primary cleaner tailing, primary cleaner tailing is back to roughing flotation operation and forms closed cycle;
Primary cleaning concentrate pulp concentration is 10 ~ 25%, adds 200 ~ 800 grams of adjusting agents to carry out recleaning; Obtain recleaning concentrate and recleaning mine tailing, recleaning mine tailing is back to primary cleaning operation and forms closed cycle;
Recleaning concentrate pulp concentration is 5 ~ 20%, adds 100 ~ 400 grams of adjusting agents to carry out triple cleaning, obtains flotation fluoro-carbon-cerium ore concentrate and triple cleaning mine tailing, and triple cleaning mine tailing is back to recleaning operation and forms closed cycle.
2. the beneficiation method of bastnaesite according to claim 1, is characterized in that described adjusting agent is one or more in sodium carbonate, waterglass, aluminum sulfate or calgon.
3. the beneficiation method of bastnaesite according to claim 1, is characterized in that described collecting
Agent is one or more in enuatrol, oxidized paraffin wax soap, Using Salicyl Hydroximic Acid ammonium, Using Salicyl Hydroximic Acid, benzene first hydroximic acid or alkylhydroxamic acid.
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| CN102886312A (en) * | 2012-10-15 | 2013-01-23 | 内蒙古科技大学 | Mineral sorting method for separating bastnaesite and monazite from high-grade mixed rare-earth concentrate |
| CN103301949B (en) * | 2013-05-17 | 2014-08-13 | 中国地质科学院矿产综合利用研究所 | Foaming agent for rare earth ore dressing and normal-temperature ore dressing process of low-grade refractory rare earth ore |
| CN103386358A (en) * | 2013-07-19 | 2013-11-13 | 广州有色金属研究院 | Ore dressing method for low-grade rare earth ore |
| CN103962232B (en) * | 2014-05-08 | 2016-06-08 | 广东省工业技术研究院(广州有色金属研究院) | A kind of beneficiation method of Rare Earth Mine |
| CN104607320A (en) * | 2014-11-19 | 2015-05-13 | 四川省地质矿产勘查开发局成都综合岩矿测试中心 | Efficient flotation collector for rare earth ore |
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