CN102319632B - Beneficiation method for improving rare earth grade of rare earth ore - Google Patents
Beneficiation method for improving rare earth grade of rare earth ore Download PDFInfo
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Abstract
The invention relates to a beneficiation method for improving rare earth grade of rare earth ore, and belongs to the technical field of beneficiation technologies. The method is a beneficiation method by using low-grade rare earth ore concentrate to prepare high-grade rare earth ore concentrate and is characterized in that: the low-grade rare earth ore concentrate of which rare earth ore (REO) grade is below 60 percent and which is widely used in conventional production is used as a raw material; a washing reagent removal process which is never used in the traditional rare earth beneficiation is adopted in a beneficiation technology; and the whole flotation process adopts a mode of closed cycle beneficiation, so middling ore cannot be produced, and the grade and the recovery rate of the ore concentrate are improved. The invention has the remarkable characteristics that: the high-grade rare earth ore concentrate of which the REO grade is more than or equal to 65 percent and the recovery rate is more than or equal to 95 percent are produced, and high-quality raw materials are provided for effective improvement of the traditional rare earth smelting technology.
Description
Technical field
The present invention relates to the beneficiation method that a kind of low-grade rare earth ore concentrate prepares high-grade RE concentrate, belong to the ore-dressing technique technical field.
Background technology
It all is low-grade concentrate basically that Baotou rare earth ore concentrate is smelted the rare earth ore concentrate that is adopted, and the rare earth grade in this concentrate is generally all about 50%.Handling this mixed rare earth concentrates has two kinds of main technique at present, and a kind of is the concentrated sulfuric acid roasting method, and a kind of is the NaOH decomposition method.Concentrated sulfuric acid roasting technology just was applied to before 30 years in the rare-earth smelting, and this is a kind of smelting process of effective extraction rare earth In the view of at that time.Yet along with development of science and technology, and to the more and more attention of environmental protection, many shortcomings of this flow process are also more and more outstanding, as: three-waste pollution is serious, and after new discharging mark was implemented, this technology had the risk of stopping production probably; The radioactive element thorium can not effectively reclaim, and can only have the place of environmental administration's formulation as debris dump, and need pay high expense; The rare-earth products rate of recovery is not high, causes the serious wasting of resources.The NaOH decomposition method is that the problems such as the three wastes that the enterprise of mishmetal mining and metallurgy refining in recent years produces owing to concentrated sulfuric acid roasting technology are difficult to solve really; And a kind of new technology of having to take; But the prerequisite of this technology is that the grade of rare earth ore concentrate is at least more than 60%; Yet the technology of just present ore dressing of rare earth, the rare earth ore concentrate that produce REO >=60% is extremely difficult, even produce the rare earth ore concentrate of REO >=60%; The rate of recovery of rare earth ore concentrate also is to be difficult to guarantee, has caused the bigger loss of rare-earth mineral on the contrary.
Essentially, causing the most important reason of the problems referred to above is exactly the raw material problem of rare-earth mineral.If the grade of Rare Earth Mine reaches more than 65%, the three-waste pollution problem of rare-earth smelting enterprise, the smelting process middle rare earth rate of recovery are lower etc., and problem will be readily solved.But adopt original ore-dressing technique to be difficult to prepare the rare earth ore concentrate of qualified grade more than 65%; This mainly contains two reasons: what 1, original ore-dressing technique adopted is the ore-dressing practice of open circuit; The higher rare earth ore concentrate of grade is once simply to scan after admixed together, and the rate of recovery naturally will be very low when producing high-grade RE concentrate.2,, than higher, serious when the medicament accumulation, when the ore pulp water hardness is big, can causes the medicament inefficacy and not have flotation efficiency to the requirement of floating agent and flotation conditions because the more complicated of rare-earth mineral own.
The present invention considers from these aspects just, is raw material with low-grade rare earth ore concentrate, invents a kind of ore-dressing technique of new production high-grade RE concentrate.The ore-dressing technique of the closed cycle of this process using; Can guarantee that rare earth ore concentrate has the high rate of recovery; The water elution pharmaceutical worker artistic skill that adopts guarantees flotation conditions preferably, makes stable the carrying out of floatation process, and that uses that this technology can be stable produces rare earth grade REO >=65%; The high-grade of the rate of recovery >=95%, the rare earth ore concentrate of high-recovery, thus quality raw materials are provided for the thorough reform of Baotou rare earth metallurgy industry.
Summary of the invention
The object of the present invention is to provide a kind of Rare Earth Mine to improve the beneficiation method of rare earth grade, use this method can produce the rare earth ore concentrate of high-grade, high-recovery.
Technical solution: the present invention adopts following beneficiation steps:
1) roughly select: raw material: mixed rare earth concentrates, mixed rare earth concentrates is joined in the flotation cell, add water and mix to size mixing and to begin and stir, make the ore pulp mass concentration be controlled at 35～65%, slurry temperature is 25～65 ℃; When stirring, add inhibitor, collecting agent, foaming agent successively, the pH of ore pulp is 8～10 in the rougher process, the medicament addition of roughly selecting by weight: inhibitor 0.5～3.0kg/t, collecting agent 0.4～2.5kg/t, foaming agent 0.05～0.18kg/t; Product after roughly selecting is for roughly selecting concentrate and rougher tailings;
2) selected: roughly selecting concentrate, to carry out the first order selected, will roughly select concentrate and join in the flotation cell, adds water and mix and size mixing, and stirs, and makes the ore pulp mass concentration be controlled at 40～60%, and slurry temperature is 25～65 ℃; When stirring, add inhibitor, collecting agent, foaming agent successively; The pH of ore pulp is 8～10 in the first order refining process, and the selected back of first order product is selected concentrate of the first order and the selected chats of the first order, and the selected chats of the first order turns back in the rougher cell after the washing reagent removal; Proceed to roughly select next time; It is selected that the selected concentrate of the first order is carried out the second level, the selected concentrate of the first order added water mix and size mixing, and stirs; Make the ore pulp mass concentration be controlled at 40～60%, slurry temperature is 25～65 ℃; When stirring, add inhibitor, collecting agent, foaming agent successively; The pH of ore pulp is 8～10 in the refining process, and the product after the second level is selected is the selected chats of the selected concentrate in the second level and the second level, and the selected chats in the second level turns back to the selected step of the first order after the washing reagent removal; It is selected that the selected concentrate in the second level is carried out the third level; By that analogy, form selected closed cycle ore dressing mode, selected medicament addition by weight: inhibitor 0.2～1.0kg/t; Collecting agent 0.4～1.5kg/t, foaming agent 0.02～0.06kg/t; The washing reagent removal is the process that the remaining medicament in the selected chats of selected step is removed, and in the washing reagent removal process: the addition of water is 0.5～10 times of selected chats gross weight, and washing temperature is 10～55 ℃;
3) scan: rougher tailings is carried out the first order scan, rougher tailings is joined in the flotation cell, add the water mixing and size mixing, stir, make the ore pulp mass concentration be controlled at 35～60%, slurry temperature is 25～65 ℃; When stirring, add inhibitor, collecting agent, foaming agent successively, the pH that scans ore pulp in the process is 8～10, and the product after the first order is scanned is that the first order is scanned chats and the first order is scanned mine tailing; The first order turns back in the rougher cell after scanning chats washing reagent removal, proceeds to roughly select next time, the first order is scanned mine tailing carry out the second level and scan; The first order is scanned mine tailing to be added water and mixes and to size mixing; Stir, make the ore pulp mass concentration be controlled at 35～60%, slurry temperature is 25～65 ℃; When stirring, add inhibitor, collecting agent, foaming agent successively, the pH that scans ore pulp in the process is 8～10, and the product after scan the second level is that chats is scanned in the second level and mine tailing is scanned in the second level; The second level is scanned and is turned back to the first order after the chats washing reagent removal and scan step; The second level is scanned mine tailing and is carried out the third level and scan, and by that analogy, forms the closed cycle ore dressing mode of scanning; The medicament addition of scanning is by weight: inhibitor 0～0.8kg/t; Collecting agent 0.4～1.3kg/t, foaming agent 0.02～0.08kg/t, the washing reagent removal is with the process that the remaining medicament in the chats is removed of scanning of scanning step; In the washing reagent removal process: the addition of water is to scan 0.5～10 times of chats gross weight, and washing temperature is 10～55 ℃.
Described mishmetal ore deposit raw material is fluorine carbon cerium and the mishmetal ore deposit of monazite between 30～60% for the REO grade.
Described inhibitor is a waterglass.
Collecting agent is a kind of among hydroximic acid collecting agent H205, LF8#, the LF10#.
Foaming agent is No. 2 oil or 318.
The described selected and said progression of scanning is confirmed by the grade of rare earth ore concentrate.
Described washing reagent removal is a kind of equipment that adopts in thickener or water conservancy cyclone or the filter.
The present invention adopts the closed circuit beneficiation method of circulation to carry out ore dressing; Whole ore dressing process through roughly selecting, selected, scan three steps; Last high-grade rare earth ore concentrate of output and the very low rare-earth tailing of grade, the chats of each grade generation return the upper level flotation after all passing through the washing reagent removal successively; Promptly do not have the generation of chats, guaranteed the rate of recovery of rare earth.
Advantage of the present invention is:
1, do not have the generation of chats in the whole ore dressing process, have only concentrate and tailings.Because do not have the generation of chats, the rate of recovery of rare earth is higher than more than 95%, the grade of concentrate can reach more than 65%, as a kind of high-grade RE concentrate product, is used for rare-earth smelting; Mine tailing can also be as the raw material that further reclaims rare earth as the raw material that extracts useful elements such as fluorite, iron, scandium, niobium, and the rate of recovery of rare earth will be higher like this.
2, adopt the high-grade that the ore dressing mode of closed cycle of the present invention can produce, the rare earth ore concentrate of high-recovery; Though the more existing ore-dressing technique of this technology is loaded down with trivial details, increased the cost of ore dressing, this high-grade, when being used for rare-earth smelting, the high-recovery rare earth ore concentrate can reduce smelting cost greatly; Reduced discharging wastes; And significantly improve the rate of recovery of rare earth, and also help the recovery of byproduct in the rare-earth smelting process, realized the comprehensive utilization of rare-earth mineral.
3, the present invention can effectively eliminate the influence of medicament accumulation to the floatation process process after having adopted the step of washing reagent removal.Guaranteed having of initiate floating agent higher sort performance, improved beneficiating efficiency, guarantee the stable smooth operation of floatation process.
4, the present invention is not only applicable to the Bayan Obo mixed rare earth concentrates, is applicable to the low-grade rare earth ore concentrate in other area yet.
Description of drawings
Fig. 1 is a process chart of the present invention.
The specific embodiment
Describe the present invention in detail through embodiment below, but the invention is not restricted to these embodiment.
Embodiment 1
The rare earth grade is 38.26% Bayan Obo mixed rare earth concentrates; Utilize technology of the present invention; Formulated the closed cycle mineral processing circuit of the selected and once purging selection of one roughing, four times; All adopt in the whole technology water conservancy cyclone to corresponding selected chats with scan chats and wash reagent removal, the quality that in water conservancy cyclone, adds entry is 3 times of mineral weight, 25 ℃ of water temperatures.
1) roughly select: will contain REO and be 38.26% mixed rare earth concentrates and join in the flotation cell, and add water and mix to size mixing and make the ore pulp mass concentration be controlled at 45% and begin to stir, slurry temperature is 38 ℃; When stirring, add waterglass 0.8kg/t successively, LF8#1.8kg/t, 318 is 0.12kg/t; The pH of ore pulp is 9.4, roughly selects with this understanding, obtains roughly selecting concentrate and rougher tailings; Roughly selecting concentrate, to proceed the first order selected, and rougher tailings is proceeded the first order and scanned;
2) first order is selected: will roughly select concentrate and join in the flotation cell, and add water and mix to size mixing and make the ore pulp mass concentration be controlled at 65% and begin to stir, slurry temperature is 28 ℃; When stirring, add waterglass 0.5kg/t successively; LF8#1.2kg/t, 318 is 0.05kg/t, the pH of ore pulp is 9.6; It is selected to carry out the first order with this understanding; Obtain selected concentrate of the first order and the selected chats of the first order, it is selected that the selected concentrate of the first order is proceeded the second level, and the selected chats of the first order returns roughly selecting next time after through the washing reagent removal;
3) second level is selected: the concentrate that the first order is selected joins in the flotation cell, adds water and mixes to size mixing and make the ore pulp mass concentration be controlled at 65% and begin to stir, and slurry temperature is 28 ℃; When stirring, add waterglass 0.5kg/t successively; LF8#1.1/t, 318 is 0.04kg/t, the pH of ore pulp is 9.6; It is selected to carry out the second level with this understanding; Obtain the selected chats of the selected concentrate in the second level and the second level, it is selected that the selected concentrate in the second level is proceeded the third level, and it is selected to return upper level after the selected chats process washing reagent removal of the second level;
4) third level is selected: the concentrate that the second level is selected joins in the flotation cell, adds water and mixes to size mixing and make the ore pulp mass concentration be controlled at 65% and begin to stir, and slurry temperature is 28 ℃; When stirring, add waterglass 0.5kg/t successively; LF8#0.8kg/t, 318 do not add, and the pH of ore pulp is 9.6; It is selected to carry out the third level with this understanding; Obtain selected concentrate of the third level and the selected chats of the third level, it is selected that the selected concentrate of the third level is proceeded the fourth stage, and it is selected to return upper level after the selected chats process of the third level washing reagent removal;
5) fourth stage is selected: the concentrate that the third level is selected joins in the flotation cell, adds water and mixes to size mixing and make the ore pulp mass concentration be controlled at 65% and begin to stir, and slurry temperature is 28 ℃; When stirring, add waterglass 0.4kg/t successively, LF8#0.6kg/t, 318 do not add; The pH of ore pulp is 9.6, and it is selected to carry out the fourth stage with this understanding, obtains selected concentrate of the fourth stage and the selected chats of the fourth stage; The selected concentrate of the fourth stage is as final products; Obtaining rare earth grade REO is 66.31%, and the rate of recovery is 95.83% high-grade RE concentrate, and it is selected to return upper level after the selected chats process of the fourth stage washing reagent removal;
6) first order is scanned: rougher tailings is joined in the flotation cell, add water and mix to size mixing and make the ore pulp mass concentration be controlled at 35% and begin to stir, slurry temperature is 25 ℃; When stirring, add waterglass successively and do not add, LF8#0.6kg/t, 318 is 0.05kg/t.The pH of ore pulp is 9.0, carries out the first order with this understanding and scans, and obtains that the first order is scanned chats and the first order is scanned mine tailing; The first order is scanned chats and is returned after the reagent removal through washing and roughly select, and the first order is scanned mine tailing is used to reclaim other useful elements as final products raw material.
Embodiment 2
The rare earth grade is 44.58% Bayan Obo mixed rare earth concentrates; Utilize technology of the present invention; Formulated the closed cycle mineral processing circuit that one roughing, triple cleaning and secondary are scanned; All adopt in the whole technology filter to corresponding selected chats with scan chats and wash reagent removal, the quality that in filter, adds entry is 0.5 times of mineral weight, 55 ℃ of water temperatures.
1) roughly selects: will contain REO and be 44.58% mixed rare earth concentrates; Scan two kinds of chats that produced with and the first order selected through the first order after the washing reagent removal; Join together in the flotation cell, add water and mix to size mixing and make the ore pulp mass concentration be controlled at 35% and begin to stir, slurry temperature is 50 ℃; When stirring, add waterglass 1.0kg/t successively, H205 is 1.6kg/t, and No. two oil are 0.12kg/t; The pH of ore pulp is 8.2, roughly selects with this understanding, obtains roughly selecting concentrate and rougher tailings; Roughly selecting concentrate, to proceed the first order selected, and rougher tailings is proceeded the first order and scanned;
2) first order is selected: will roughly select concentrate and join together in the flotation cell through the selected chats in the second level of washing after the reagent removal, and add water and mix to size mixing and make the ore pulp mass concentration be controlled at 45% and begin to stir, slurry temperature is 43 ℃; When stirring, add waterglass 0.6kg/t successively; H205 is 1.1kg/t, and No. two oil are 0.06kg/t, and the pH of ore pulp is 8.7; It is selected to carry out the first order with this understanding; Obtain selected concentrate of the first order and the selected chats of the first order, it is selected that the selected concentrate of the first order is proceeded the second level, and the selected chats of the first order returns roughly selecting next time after through the washing reagent removal;
3) second level is selected: join together in the flotation cell with the selected concentrate of the first order with through the selected chats of the third level of washing after the reagent removal, add water and mix to size mixing and make the ore pulp mass concentration be controlled at 45% and begin to stir, slurry temperature is 43 ℃; When stirring, add waterglass 0.4kg/t successively; H205 is 0.8/t, and No. two oil are 0.04kg/t, and the pH of ore pulp is 8.7; It is selected to carry out the second level with this understanding; Obtain the selected chats of the selected concentrate in the second level and the second level, it is selected that the selected concentrate in the second level is proceeded the third level, and it is selected to return upper level after the selected chats process washing reagent removal of the second level;
4) third level is selected: the selected concentrate in the second level is joined in the flotation cell, add water and mix to size mixing and make the ore pulp mass concentration be controlled at 45% and begin to stir, slurry temperature is 43 ℃; When stirring, add waterglass 0.2kg/t successively, H205 is 0.5kg/t, and No. two oil does not add; The pH of ore pulp is 8.7, and it is selected to carry out the third level with this understanding, obtains selected concentrate of the third level and the selected chats of the third level; The selected concentrate of the third level is as final products; Obtaining rare earth grade REO is 65.82%, and the rate of recovery is 95.27% high-grade RE concentrate, and it is selected to return upper level after the selected chats process of the third level washing reagent removal;
6) first order is scanned: with rougher tailings with scan chats through the second level of washing after the reagent removal and join together in the flotation cell, add water and mix to size mixing and make the ore pulp mass concentration be controlled at 38% and begin to stir, slurry temperature is 40 ℃; When stirring, add waterglass 0.3kg/t successively; H205 is 0.6kg/t, and No. two oil are 0.05kg/t, and the pH of ore pulp is 8.0; Carrying out the first order with this understanding scans; Obtain that the first order is scanned chats and the first order is scanned mine tailing, the first order is scanned chats and is returned after through the washing reagent removal and roughly select, and the first order is scanned mine tailing and proceeded the second level and scan;
7) scan the second level: the mine tailing that the first order is scanned joins in the flotation cell, adds water and mixes to size mixing and make the ore pulp mass concentration be controlled at 38% and begin to stir, and slurry temperature is 40 ℃; When stirring, add successively: waterglass does not add; H205 is 0.5kg/t, and No. two oil are 0.03kg/t, and the pH of ore pulp is 8.0; Carrying out the second level with this understanding scans; Must arrive that chats is scanned in the second level and mine tailing is scanned in the second level, the second level is scanned chats and is returned the first order after through the washing reagent removal and scan, and mine tailing is used to reclaim the raw material of other useful elements as final products.
Embodiment 3
The rare earth grade is 48.99% Bayan Obo mixed rare earth concentrates; Utilize technology of the present invention; Formulated the technological process that one roughing, triple cleaning and secondary are scanned; Adopt water conservancy cyclone to corresponding selected chats with scan chats and wash reagent removal, the addition of water is 10 times of mineral quality during the washing reagent removal, 10 ℃ of water temperatures.
Medicament addition during flotation is by weight: roughly select: waterglass 1.8kg/t, and LF10#2.5kg/t, 318 is 0.18kg/t; One essence: waterglass 0.6kg/t, LF10#1.2kg/t, 318 is 0.06kg/t; Two essences: waterglass 0.5kg/t, LF10#1.3/t, 318 is 0.05kg/t; Three essences: waterglass 0.2kg/t, LF10#1.2kg/t, 318 is 0kg/t; Sweep: waterglass 0.4kg/t, LF10#1.5kg/t, 318 is 0.05kg/t; Two sweep: waterglass 0kg/t, and LF10#0.8kg/t, 318 is 0.04kg/t.The primary slurry mass concentration is controlled at 65%, and slurry temperature is 53 ℃, and the pH of ore pulp is 9.7; Selected ore pulp mass concentration is controlled at 60%, and slurry temperature is 48 ℃, and the pH of ore pulp is 10; Scan the ore pulp mass concentration and be controlled at 45%, slurry temperature is 50 ℃, and the pH of ore pulp is 9.4.Finally obtaining rare earth grade REO is 65.65%, and the rate of recovery is 96.71% high-grade RE concentrate.
Embodiment 4
The rare earth grade is 55.87% Bayan Obo mixed rare earth concentrates; Utilize technology of the present invention; Formulated the technological process that one roughing, recleaning and secondary are scanned; Adopt water conservancy cyclone to corresponding selected chats with scan chats and wash reagent removal, the addition of water is 8 times of mineral quality during the washing reagent removal, 15 ℃ of water temperatures.
Medicament addition during flotation is by weight: roughly select: waterglass 3.0kg/t, and LF8#2.5kg/t, 318 is 0.16kg/t; One essence: waterglass 1.0kg/t, LF8#1.4kg/t, 318 is 0.6kg/t; Two essences: 0.5kg/t, LF8#1.1/t, 318 is 0.05kg/t; Sweep: waterglass 0.2kg/t, LF8#1.5kg/t, 318 is 0.06kg/t; Two sweep: waterglass 0kg/t, and LF8#0.6kg/t, 318 is 0.04kg/t.The primary slurry mass concentration is controlled at 47%, and slurry temperature is 39 ℃, and the pH of ore pulp is 9.2; Selected ore pulp mass concentration is controlled at 58%, and slurry temperature is 36 ℃, and the pH of ore pulp is 9.7; Scan the ore pulp mass concentration and be controlled at 35%, slurry temperature is 32 ℃, and the pH of ore pulp is 9.1.Finally obtaining rare earth grade REO is 66.42%, and the rate of recovery is 95.21% high-grade RE concentrate.
Embodiment 5
The rare earth grade is 58.64% Bayan Obo mixed rare earth concentrates; Utilize technology of the present invention; The technological process of having formulated one roughing, recleaning and having scanned for three times; Adopt thickener to corresponding selected chats with scan chats and wash reagent removal, the addition of water is 2.5 times of mineral quality during the washing reagent removal, 35 ℃ of water temperatures.
Medicament addition during flotation is by weight: roughly select: waterglass 2.6kg/t, and LF8#2.2kg/t, 318 is 0.16kg/t; One essence: waterglass 0.8kg/t, LF8#1.2kg/t, 318 is 0.05kg/t; Two essences: waterglass 0.4kg/t, LF8#0.8/t, 318 is 0.04kg/t; Sweep: waterglass 0.2kg/t, LF8#0.6kg/t, 318 is 0.05kg/t; Two sweep: 0kg/t, and LF8#0.7kg/t, 318 is 0.03kg/t; Three sweep: waterglass 0kg/t, and LF8#0.3kg/t, 318 is 0.02kg/t.The primary slurry mass concentration is controlled at 52%, and slurry temperature is 48 ℃, and the pH of ore pulp is 9.6; Selected ore pulp mass concentration is controlled at 60%, and slurry temperature is 44 ℃, and the pH of ore pulp is 9.9; Scan the ore pulp mass concentration and be controlled at 40%, slurry temperature is 39 ℃, and the pH of ore pulp is 9.5.Finally obtaining rare earth grade REO is 66.43%, and the rate of recovery is 95.55% high-grade RE concentrate.
Claims (5)
1. the beneficiation method of a Rare Earth Mine raising rare earth grade is characterized in that it comprises the steps:
1) roughly select: raw material: mixed rare earth concentrates, mixed rare earth concentrates is joined in the flotation cell, add water and mix to size mixing and to begin and stir, make the ore pulp mass concentration be controlled at 35～65%, slurry temperature is 25～65 ℃; When stirring, add inhibitor, collecting agent, foaming agent successively, the pH of ore pulp is 8～10 in the rougher process, the medicament addition of roughly selecting by weight: inhibitor 0.5～3.0kg/t, collecting agent 0.4～2.5kg/t, foaming agent 0.05～0.18kg/t; Product after roughly selecting is for roughly selecting concentrate and rougher tailings; Described mixed rare earth concentrates raw material is fluorine carbon cerium and the mishmetal ore deposit of monazite between 30～60% for the REO grade;
2) selected: roughly selecting concentrate, to carry out the first order selected, will roughly select concentrate and join in the flotation cell, adds water and mix and size mixing, and stirs, and makes the ore pulp mass concentration be controlled at 40～60%, and slurry temperature is 25～65 ℃; When stirring, add inhibitor, collecting agent, foaming agent successively; The pH of ore pulp is 8～10 in the first order refining process, and the selected back of first order product is selected concentrate of the first order and the selected chats of the first order, and the selected chats of the first order turns back in the rougher cell after the washing reagent removal; Proceed to roughly select next time; It is selected that the selected concentrate of the first order is carried out the second level, the selected concentrate of the first order added water mix and size mixing, and stirs; Make the ore pulp mass concentration be controlled at 40～60%, slurry temperature is 25～65 ℃; When stirring, add inhibitor, collecting agent, foaming agent successively; The pH of ore pulp is 8～10 in the refining process, and the product after the second level is selected is the selected chats of the selected concentrate in the second level and the second level, and the selected chats in the second level turns back to the selected step of the first order after the washing reagent removal; It is selected that the selected concentrate in the second level is carried out the third level; By that analogy, form selected closed cycle ore dressing mode, selected medicament addition by weight: inhibitor 0.2～1.0kg/t; Collecting agent 0.4～1.5kg/t, foaming agent 0.02～0.06kg/t; The washing reagent removal is the process that the remaining medicament in the selected chats of selected step is removed, and in the washing reagent removal process: the addition of water is 0.5～10 times of selected chats gross weight, and washing temperature is 10～55 ℃;
3) scan: rougher tailings is carried out the first order scan, rougher tailings is joined in the flotation cell, add the water mixing and size mixing, stir, make the ore pulp mass concentration be controlled at 35～60%, slurry temperature is 25～65 ℃; When stirring, add inhibitor, collecting agent, foaming agent successively, the pH that scans ore pulp in the process is 8～10, and the product after the first order is scanned is that the first order is scanned chats and the first order is scanned mine tailing; The first order turns back in the rougher cell after scanning chats washing reagent removal, proceeds to roughly select next time, the first order is scanned mine tailing carry out the second level and scan; The first order is scanned mine tailing to be added water and mixes and to size mixing; Stir, make the ore pulp mass concentration be controlled at 35～60%, slurry temperature is 25～65 ℃; When stirring, add inhibitor, collecting agent, foaming agent successively, the pH that scans ore pulp in the process is 8～10, and the product after scan the second level is that chats is scanned in the second level and mine tailing is scanned in the second level; The second level is scanned and is turned back to the first order after the chats washing reagent removal and scan step; The second level is scanned mine tailing and is carried out the third level and scan, and by that analogy, forms the closed cycle ore dressing mode of scanning; The medicament addition of scanning is by weight: inhibitor 0～0.8kg/t; Collecting agent 0.4～1.3kg/t, foaming agent 0.02～0.08kg/t, the washing reagent removal is with the process that the remaining medicament in the chats is removed of scanning of scanning step; In the washing reagent removal process: the addition of water is to scan 0.5～10 times of chats gross weight, and washing temperature is 10～55 ℃;
Described washing reagent removal is a kind of equipment that adopts in thickener or water conservancy cyclone or the filter.
2. a kind of Rare Earth Mine according to claim 1 improves the beneficiation method of rare earth grade, and it is characterized in that: described inhibitor is a waterglass.
3. a kind of Rare Earth Mine according to claim 1 improves the beneficiation method of rare earth grade, and it is characterized in that: collecting agent is hydroximic acid collecting agent H205.
4. a kind of Rare Earth Mine according to claim 1 improves the beneficiation method of rare earth grade, and it is characterized in that: foaming agent is No. 2 oil.
5. a kind of Rare Earth Mine according to claim 1 improves the beneficiation method of rare earth grade, it is characterized in that: progression selected and that scan is confirmed by the grade of rare earth ore concentrate.
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| CN 201110224275 CN102319632B (en) | 2011-07-28 | 2011-07-28 | Beneficiation method for improving rare earth grade of rare earth ore |
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| CN102886300B (en) * | 2012-10-19 | 2013-12-18 | 内蒙古科技大学 | Ore separation method for recycling scandium from bayan obo tailings |
| CN103831173B (en) * | 2014-03-17 | 2016-09-07 | 内蒙古包钢钢联股份有限公司 | A kind of improve the mine tailing middle rare earth rate of recovery and the process of fluorite grade |
| CN105597936B (en) * | 2015-08-31 | 2018-12-11 | 李梅 | A kind of method that substep selects high-grade RE concentrate |
| CN105597937B (en) * | 2015-08-31 | 2019-01-04 | 李梅 | A kind of method of low-grade improving rare earth grade of rare earth ore |
| CN106269262B (en) * | 2016-08-10 | 2018-05-22 | 广东省资源综合利用研究所 | A kind of method of microfine Rare Earth Mine carrier flotation |
| CN112851171A (en) * | 2021-02-10 | 2021-05-28 | 河南科技大学 | Method for producing dyed color sand by using tailings as raw materials |
| CN113663814A (en) * | 2021-07-14 | 2021-11-19 | 包头钢铁（集团）有限责任公司 | Method for stably improving concentrate grade in concentration and filtration system |
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| CA1260632A (en) * | 1986-09-05 | 1989-09-26 | Srdjan Bulatovic | Froth flotation of bastnaesite |
| CN101444761B (en) * | 2009-01-04 | 2011-11-30 | 武汉工程大学 | A floatation separation method of hamartite misch metal mine containing high content mengite |
| CN101474597B (en) * | 2009-01-23 | 2011-09-07 | 武汉工程大学 | Floatation separation method for mengite and hamartite in misch metal ore concentrate |
| CN102051477B (en) * | 2010-12-15 | 2012-07-04 | 内蒙古科技大学 | Method for chemically separating bastnaesite and urdite from mixed rare earth concentrate |
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