CN108787159A

CN108787159A - A kind of synthetical recovery beneficiation method of low-grade uranium-bearing polymetallic ore

Info

Publication number: CN108787159A
Application number: CN201810493921.4A
Authority: CN
Inventors: 李松清; 崔栓芳; 朱阳戈; 崔强; 郑桂兵; 王建国; 胡进平; 高明; 王翾; 吕淑湛; 任爱军
Original assignee: 224 Group Of China Shaanxi Nuclear Industry Group Co Ltd; BGRIMM Technology Group Co Ltd
Current assignee: 224 Group Of China Shaanxi Nuclear Industry Group Co Ltd; BGRIMM Technology Group Co Ltd
Priority date: 2018-05-22
Filing date: 2018-05-22
Publication date: 2018-11-13
Anticipated expiration: 2038-05-22
Also published as: CN108787159B

Abstract

The present invention provides a kind of synthetical recovery beneficiation methods of low-grade uranium-bearing polymetallic ore, the described method comprises the following steps：(1) the overflow product that uranium-bearing polymetallic ore is obtained through ore grinding is subjected to fair current magnetic separation roughing operation and the selected operation of adverse current magnetic separation successively, obtains iron ore concentrate and the first tailing；(2) by tailing is concentrated and flotation obtains the first concentrate and the second tailing, the first concentrate carry out it is selected obtains lead silver preparation concentrate, the second tailing is scanned to obtain third tailing；(3) by third tailing through roughing flotation and it is selected after obtain uranium Biobium rare-earth bulk concentrate.Mineral processing index of the present invention is good, it realizes and fully recycles the purpose that each useful constituent in tail coarse grain rough concentrate is thrown in gravity treatment under the conditions of corase grinding, a kind of efficient Mineral separation beneficiation technologies are provided for large-scale developing and utilizing for the more metal Hard Rock-type uranium ores of China's low-grade complex, and significantly reduce the cost that follow-up hydrometallurgy of uranium carries uranium, niobium and rare earth.

Description

A kind of synthetical recovery beneficiation method of low-grade uranium-bearing polymetallic ore

Technical field

The invention belongs to uranium ore ore dressing fields, are related to a kind of synthetical recovery beneficiation method of low-grade uranium-bearing polymetallic ore, More particularly to a kind of synthetical recovery beneficiation method of low-grade uranium-bearing, niobium, lead, silver, iron and the more metal Hard Rock-type uranium ores of rare earth.

Background technology

China contains in somewhere one based on uranium, niobium and lead ore, and (companion) has gold, silver, bismuth, cadmium, barium strontium and rare earth etc. altogether The ultra-large type Hard Rock-type uranium deposit of mineral products has the characteristics that scale is big, mineral are more, grade is low, buried depth is shallow and easy exploitation, contains uranium ore Species are more, disseminated grain size is thin and uneven, and gangue mineral is based on quartz, potassium feldspar and calcite.The mine uranium-bearing 0.014%~0.016%, leaded 0.7% or so, contain niobium 0.02% or so, Lead oxidation rate 30% or so selects smelting difficulty larger. In China, the technique of preparing comparative maturity of independent magnetite and galena, based on magnetic separation, galena is magnetic iron ore with flotation It is main, but the patent of invention of the selecting technology that top-ups of high calcareous low-grade betafite is had not been reported, and for such low product The more uranium ores in position still lack a kind of science of suitable large-scale production and the rational each useful component synthetical recovery of economic technology Beneficiation flowsheet, in decades, the uranium deposit are constantly in " slow-witted mine " state for failing exploitation.

As China greatly develops nuclear power, demand of the China to uranium ore resource is also sharply increasing, but due to China's uranium ore Endowment of resources is not whole high, and uranium ore Economical mineability stock number is little, cannot meet itself nuclear power station growth requirement, most of uranium ore Resource needs import, uranium ore pricing right to rest in the big national champion of a few uranium resource.

CN 106925433A disclose a kind of ore-dressing of polymetallic ore technique containing betafite, are carried out first to ore Gravity treatment after being classified is ground, gravity concentrate regrinds rear Flotation of Sulfide Ores, magnetic separation iron ore object, obtains sulphide concentrate and iron ore concentrate；Its It is secondary, except the Uranium-rich ore slurry after iron recycles betafite by flotation again, by adding betafite high-efficient collecting agent, using niobium titanium Uranium ore direct flotation obtains uranium concentrate.It is main although more metal ore dressing techniques containing betafite that process provides a kind of There are problems that two：(1) raw ore is directly milled to -0.2mm re-gradings-gravity treatment and throws tail, and ore grinding cost is higher, industrially not necessarily adopts With；(2) technique is directed to relatively high uranium grade and the lower gravity treatment rough concentrate of calcic, magnesium carbonate mineral content, point Ring selection border is good, but the grade of gravity treatment rough concentrate and carbonate content height are larger to follow-up uranium concentrate qualitative effects, not necessarily The recycling of betafite tail rough concentrate is thrown in gravity treatment under compared with coarse crushing abrasive grain degree；(3) patent exists for uranium grade The rate of recovery of 0.02% raw ore below, final uranium concentrate only has 65% or so, and the concentration ratio of flotation operation uranium concentrate uranium It is not high.

Invention content

For, there are cost recovery height, the rate of recovery is low in existing low-grade more uranium ore recovery methods and concentrate grade not The problems such as high, the present invention provides the synthetical recovery beneficiation methods of uranium-bearing polymetallic ore.Comprehensive utilization ore dressing of the present invention Method can be significantly expanded the available resources of uranium, be extremely important for China's economic development and national defense construction.

For this purpose, the present invention uses following technical scheme：

The present invention provides a kind of synthetical recovery beneficiation methods of uranium-bearing polymetallic ore, the described method comprises the following steps：

(1) the overflow product that uranium-bearing polymetallic ore is obtained through ore grinding is subjected to fair current magnetic separation roughing operation and adverse current magnetic successively Selected operation is selected, iron ore concentrate and the first tailing are obtained；

(2) tailing that step (1) obtains is concentrated and flotation obtains the first concentrate and the second tailing, the first concentrate carries out Selected to obtain lead silver preparation concentrate, the second tailing is scanned to obtain third tailing；

(3) by third tailing that step (2) obtains through roughing flotation and it is selected after obtain uranium Biobium rare-earth bulk concentrate.

Heretofore described " first ", " second ", " third " and " the 4th " etc., it is only for from name on to material into Row is distinguished, and there is no other meanings.

In the present invention, to the recycling sequence of metal in uranium-bearing polymetallic ore to the grade and gold of metal in obtained concentrate The rate of recovery of category has larger impact, if arbitrarily the recycling sequence of transformation metal is unable to get high-grade concentrate.

It is used as currently preferred technical solution below, but not as the limitation of technical solution provided by the invention, passes through Following technical scheme can preferably reach and realize the technical purpose and advantageous effect of the present invention.

As currently preferred technical solution, step further includes in (1)：The uranium-bearing polymetallic ore is crushed, It sieves, size mixing and throw tail with gravity treatment, obtain coarse grain rough concentrate and particulate rough concentrate, the coarse grain rough concentrate is overflow through what ore grinding obtained Miscarriage product carry out fair current magnetic separation roughing operation and the selected operation of adverse current magnetic separation successively.

Preferably, it is described it is broken include using any one in jaw crusher, gyratory crusher or high-pressure roller mill or At least two are handled, and preferably first jaw crusher and gyratory crusher are used to be handled, then with high-pressure roller mill into Row processing.

Preferably, material of the output grain size less than 4mm after the screening.

Preferably, -0.074mm grades material content < 20wt% in the material of output after the screening.

Preferably, it is described size mixing after the pulp density that controls be 20wt%~40wt%.

Preferably, the throwing tail yield that tail is thrown in the gravity treatment is 45%~55%.

Preferably, the mass concentration of the coarse grain rough concentrate is 60wt%~80wt%.

As currently preferred technical solution, step (1) described ore grinding includes broken and classification processing.

Preferably, described broken using ball mill progress.

Preferably, the classification processing is carried out using spiral classifier.

Preferably, the mog is that -0.074mm grades material content is 50wt%~60wt% in material.

Preferably, the mass concentration for the overflow product that the ore grinding obtains is 30wt%~50wt%.

As currently preferred technical solution, in step (1) fair current magnetic separation roughing operation in downstream-type magnet drum into Row.

Preferably, the concentrate that step (1) the fair current magnetic separation roughing operation obtains carries out the selected operation of adverse current magnetic separation, obtains Tailing carry out the processing procedure in step (2).

Preferably, Surface field intensity >=300GS, preferably 900GS in step (1) the fair current magnetic separation roughing operation ~1200GS.

Preferably, step (1) the selected operation of adverse current magnetic separation carries out in adverse current type magnet drum.

Preferably, step (1) the selected operation of adverse current magnetic separation obtains iron ore concentrate.

Preferably, Surface field intensity >=300GS, preferably 700GS in step (1) the selected operation of adverse current magnetic separation ~800GS.

Preferably, Iron grade > 65wt% in step (1) described iron ore concentrate.

Preferably, step (1) first tailing includes the tailing and the selected work of adverse current magnetic separation of fair current magnetic separation roughing operation The tailing of industry.

In the present invention, since the operation of fair current magnetic separation roughing operation influences the rate of recovery of iron in iron ore concentrate, adverse current magnetic separation essence Being elected to be the operation of industry influences the grade of iron in iron ore concentrate, iron in the two combined magnetic field intensity comprehensive function joint effect iron ore concentrate Grade and the rate of recovery, therefore overflow product carries out the selected operation of adverse current magnetic separation again after must first carrying out fair current magnetic separation roughing operation, it is no Iron ore concentrate that be then unable to get high-quality and that uranium content is not exceeded.

As currently preferred technical solution, step (2) described concentration includes dense with concentrator and/or taper Bucket carries out.

Preferably, a concentration of 35wt%~40wt% for the underflow that step (2) described concentration obtains.

Preferably, the underflow obtained after tailing is concentrated in step (2) carries out flotation after being mixed with floating agent.

Preferably, described be blended in agitator carries out.

Preferably, the floating agent includes pH adjusting agent, vulcanized sodium, collecting agent and foaming agent.

Preferably, the pH adjusting agent includes sulfuric acid.

Preferably, the collecting agent includes any one in butyl xanthate, ethyl xanthogenate or black powder or at least two combination.

Preferably, the foaming agent includes MIBC and/or BK204.

Preferably, the additive amount of the pH adjusting agent is 0~1000g/t, the additive amount of the vulcanized sodium be 50g/t~ The additive amount of 200g/t, the collecting agent are 50g/t~200g/t, and the additive amount of the foaming agent is 5g/t~50g/t.

As currently preferred technical solution, in step (2) the first concentrate carry out at least 2 times it is selected obtain lead silver essence Mine.

Preferably, in step (2) the first concentrate carry out it is selected for the first time after obtain the second concentrate, the second concentrate further into Obtain lead silver preparation concentrate after row is selected, further carry out it is selected after obtained tailing come back for it is selected for the first time.

Preferably, the tailing after the tailing and the second tailing obtained after the progress of the first concentrate is selected for the first time is scanned returns Back into row flotation.

Preferably, in the lead silver preparation concentrate that step (2) obtains lead grade be 40wt%~80wt%, silver-colored grade be 300g/t~ 500g/t。

Preferably, the lead recovery for the lead silver preparation concentrate that step (2) obtains be 70%~80%, silver raising recovery rate be 40%~ 50%.

Preferably, the mass concentration for the third tailing that step (2) obtains is 20wt%~40wt%.

It is thick that flotation is carried out as currently preferred technical solution, after third tailing is mixed with floating agent in step (3) Choosing.

Preferably, described be blended in agitator carries out.

Preferably, the mixing carries out at least twice, preferably three times.

Preferably, the floating agent includes gangue inhibitor, activator, pH regulators, collecting agent and foaming agent.

Preferably, when being mixed into three times, gangue inhibitor is added for the first time, and second of addition activator adds for the third time Add pH regulators, collecting agent and foaming agent.

As currently preferred technical solution, step (3) described roughing flotation includes at least 2 roughing flotations.

Preferably, third tailing obtains the 4th tailing after first time roughing flotation in step (3), and the 4th tailing is into traveling The roughing flotation of one step, the concentrate that concentrate that further roughing flotation obtains is obtained with third tailing through first time roughing flotation into The follow-up selected processing of row.

Preferably, the 4th tailing carry out the concentrate that the tailing that further roughing flotation obtains obtains after scanning return into Row first time roughing flotation.

Preferably, the 4th tailing carries out uranium product in the tailing that the tailing that further roughing flotation obtains obtains after scanning Position is 0.004%~0.005%, and the grade of niobium pentaoxide is 0.015%~0.018%.

Preferably, selected described in step (3) includes selected at least 2 times.

Preferably, the 4th tailing carries out concentrate that further roughing flotation obtains and third tailing is thick through first time flotation Obtained concentrate is selected to carry out selected for the first time, the concentrate obtained after selected for the first time obtains uranium Biobium rare-earth after further selected and mixes Close concentrate.

Preferably, the 4th tailing carries out concentrate that further roughing flotation obtains and third tailing is thick through first time flotation Select obtained concentrate to carry out selected for the first time, the tailing obtained after selected for the first time with it is further selected after obtained tailing return Roughing flotation is carried out, preferably returns and carries out roughing flotation after being mixed with floating agent.

As currently preferred technical solution, uranium grade is in the uranium Biobium rare-earth bulk concentrate obtained in step (3) 0.5wt%~1.2wt%, niobium pentaoxide grade are 0.6wt%~1.2wt%, and the grade of total amount of the rare earth oxide is 1.2wt%~2.5wt%.

Preferably, the uranium rate of recovery 80%~95% of the uranium Biobium rare-earth bulk concentrate obtained in step (3), niobium pentaoxide The rate of recovery be 80%~95%, the rate of recovery of total amount of the rare earth oxide is 65%~70%.

As currently preferred technical solution, the described method comprises the following steps：

(1) uranium-bearing polymetallic ore be crushed, sieved, sized mixing and throw tail with gravity treatment, obtained coarse grain rough concentrate and particulate is thick The overflow product that the coarse grain rough concentrate is obtained through ore grinding is carried out fair current magnetic separation roughing operation and adverse current magnetic separation essence by concentrate successively It is elected to be industry, obtains the iron ore concentrate and the first tailing of Iron grade > 65wt%, the first tailing includes the tail of fair current magnetic separation roughing operation The tailing of mine and the selected operation of adverse current magnetic separation；

Wherein, be crushed includes first jaw crusher and gyratory crusher being used to be handled, then carried out with high-pressure roller mill Processing；Output grain size is less than the material of 4mm, -0.074mm grades material content < in the material of output after screening after screening 20wt%；The pulp density controlled after sizing mixing is 20wt%~40wt%；Gravity treatment throw tail throwing tail yield be 45%~ 55%；The mass concentration of coarse grain rough concentrate is 60wt%~80wt%；

The ore grinding includes broken and classification processing, is crushed and is carried out using ball mill, and classification processing uses spiral classifier It carries out, mog is that -0.074mm grades material content is 50wt%~60wt%, the overflow product that ore grinding obtains in material Mass concentration be 30wt%~50wt%；

The fair current magnetic separation roughing operation carries out in downstream-type magnet drum, Surface field intensity >=300GS；

The selected operation of adverse current magnetic separation carries out in adverse current type magnet drum, Surface field intensity >=300GS；

(2) tailing for obtaining step (1) carries out concentration through concentrator and/or the dense bucket of taper, and concentration obtains To a concentration of 35wt%~40wt% underflow mixed in agitator with floating agent after carry out flotation, flotation obtains First concentrate and the second tailing, the first concentrate carry out obtaining the second concentrate after first time is selected, and the second concentrate further carries out essence Lead silver preparation concentrate is obtained after choosing, further carry out it is selected after obtained tailing come back for selected for the first time, the second tailing is swept Choosing obtains the third tailing that mass concentration is 20wt%~40wt%, the first concentrate carry out it is selected for the first time after obtained tailing and Tailing after second tailing is scanned comes back for flotation；

Wherein, floating agent includes pH adjusting agent, vulcanized sodium, collecting agent and foaming agent；Lead grade is in lead silver preparation concentrate 40wt%~80wt%, silver-colored grade be 300g/t~500g/t, lead recovery be 70%~80%, silver raising recovery rate be 40%~ 50%；

(3) 2 times are carried out after being mixed the third tailing that step (2) obtains three times in agitator with floating agent to float Roughing, third tailing is selected to obtain the 4th tailing after first time roughing flotation, the 4th tailing carries out further roughing flotation, into The concentrate that the tailing that the roughing flotation of one step obtains obtains after scanning comes back for first time roughing flotation, and the 4th tailing carries out Uranium grade is 0.004%~0.005% in the tailing that the tailing that further roughing flotation obtains obtains after scanning, five oxidations The grade of two niobiums is 0.015%~0.018%；Concentrate that 4th tailing is obtained through further roughing flotation and third tailing are through the Concentrate that roughing flotation obtains carry out 2 times it is selected, the concentrate obtained after selected for the first time through it is further it is selected after obtain uranium Biobium rare-earth bulk concentrate, it is selected for the first time after obtained tailing with it is further selected after obtained tailing return it is mixed with floating agent Roughing flotation is carried out after conjunction；

Wherein, floating agent includes gangue inhibitor, activator, pH regulators, collecting agent and foaming agent, obtained uranium niobium Uranium grade is 0.5wt%~1.2wt% in rare earth bulk concentrate, and niobium pentaoxide grade is 0.6wt%~1.2wt%, rare earth The grade of oxide aggregate is 1.2wt%~2.5wt%, and the rate of recovery of the uranium rate of recovery 80%~95%, niobium pentaoxide is 80%~95%, the rate of recovery of total amount of the rare earth oxide is 65%~70%.

Compared with prior art, the invention has the advantages that：

(1) present invention by using one section of corase grinding-two stages of magnetic separation technique, i.e., to uranium-bearing polymetallic ore elder generation ore grinding again successively into Row fair current magnetic separation roughing operation and the selected operation of adverse current magnetic separation, can both ensure the recycling of most magnetic iron ores, also maximum limit Degree reduces uranium content in iron ore concentrate.Also, since various valuable mineral disseminated grain size thicknesses are uneven in uranium-bearing polymetallic ore, Uranium-bearing Biobium rare-earth mineral disseminated grain size is thinner and easy argillization, suitable fineness of roughly grinding not only ensure that uranium bearing mineral aggregate and contain The dissociation of rare-earth mineral is abundant, and advantageously reduces ore grinding energy consumption and improve uranium Biobium rare-earth bulk concentrate quality；

(2) present invention is using ore flotation after the first magnetic of first magnetic separation recovery magnetic iron ore-rear floatation and recovery of lead silver and uranium Biobium rare-earth Technique can not only reduce iron in uranium concentrate, lead and silver content to greatest extent, improve uranium concentrate quality, and synthetical recovery Iron ore concentrate and lead silver preparation concentrate；Furthermore it is possible to reduce the consumption of lead silver floatation system and the acid of uranium Biobium rare-earth bulk flotation system；

(3) present invention is developed for the first time in high carbon acid calcium environment, and the uranium bearing mineral based on betafite directly top-ups Technological process is selected, meets the more flotation principle of floating few suppression, foam viscosity is moderate, middling recurrence amount is few, and is easy to regulate and control；

(4) present invention can obtain the iron ore concentrate of 65% or more Iron grade, and most magnetic iron ores is made to be recycled；Lead Leaded grade 40wt~80wt%, silver-colored grade 300g/t~500g/t, lead recovery 80% or so, silver raising recovery rate in silver preparation concentrate 40%~50%；Uranium-bearing grade 0.5wt%~1.2wt%, niobium pentaoxide grade 0.6wt% in uranium Biobium rare-earth bulk concentrate~ 1.2wt%, total amount of the rare earth oxide (REO) grade 1.2wt%~2.5wt%, the uranium rate of recovery 80%~95%, niobium pentaoxide The rate of recovery 80%~95%, the REO rate of recovery 65%~70%, are stripped of 90% or so calcium mineral, and technical-economic index is good It is good, and significantly reduce follow-up hydrometallurgy SEPARATION OF URANIUM, niobium and rare earth production cost.

Description of the drawings

Fig. 1 is the flow diagram of the synthetical recovery beneficiation method of uranium-bearing polymetallic ore described in the embodiment of the present invention 1.

Specific implementation mode

For the present invention is better described, it is easy to understand technical scheme of the present invention, below further specifically to the present invention It is bright.But following embodiments is only the simple example of the present invention, does not represent or limit the scope of the present invention, this Invention protection domain is subject to claims.

Specific embodiment of the invention part provides a kind of synthetical recovery beneficiation method of uranium-bearing polymetallic ore, the side Method includes the following steps：

In the present invention, it is how golden that the uranium-bearing polymetallic ore is primarily referred to as low-grade uranium-bearing, niobium, lead, silver, iron and rare earth The Hard Rock-type uranium ore of category etc., wherein uranium content is about 0.014wt%-0.016wt%, and lead content is about 0.7wt% or so, and niobium contains Amount is about 0.02wt% or so, and Lead oxidation rate is about 30%；Meanwhile 10wt% containing calcium oxide in the uranium-bearing polymetallic ore~ 15wt% mainly exists in the form of calcite, and calcite content is 20wt%~30wt%, therefore the present invention is in high carbon acid The direct direct floatation process flow of uranium bearing mineral in calcium environment based on betafite.

In the present invention, selected in step (2) and scan typical but unrestricted for flotation；Selected typical case in step (3) But it is unrestricted for flotation.

In the present invention, the coarse grain rough concentrate refer to raw ore it is fine crushing-gravity treatment throws the obtained coarse grain rough concentrate of tail, coarse grain is coarse-fine More metals such as uranium-bearing, lead, silver, iron and niobium and rare earth in mine, most valuable minerals in uranium-bearing polymetallic ore enter slightly In grain rough concentrate.

In the present invention, the rate of recovery is calculated for coarse grain rough concentrate.

In the present invention, the particulate rough concentrate carries out follow-up individually processing.

Preferably, it is described it is broken include using any one in jaw crusher, gyratory crusher or high-pressure roller mill or At least two are handled, and the combination is typical but non-limiting examples have：The combination of jaw crusher and gyratory crusher, circle The combination of conic crusher and high-pressure roller mill, the combination etc. of jaw crusher, gyratory crusher and high-pressure roller mill, preferably first It is handled using jaw crusher and gyratory crusher, then is handled with high-pressure roller mill.

Preferably, after the screening output grain size be less than 4mm material, such as grain size be smaller than 4mm, 3.8m, 3.6mm, 3.4mm, 3.2mm, 3mm or 2.5mm etc., it is not limited to cited numerical value, other interior unrequited numbers of the numberical range It is worth equally applicable.

Preferably, -0.074mm grades material content < 20wt% in the material of output after the screening, such as 18wt%, 16wt%, 14wt%, 12wt%, 10wt%, 8wt% or 6wt% etc., it is not limited to cited numerical value, the numerical value model Other unrequited numerical value are equally applicable in enclosing.

Preferably, it is described size mixing after the pulp density that controls be 20wt%~40wt%, such as 20wt%, 23wt%, 25wt%, 27wt%, 30wt%, 33wt%, 35wt%, 37wt% or 40wt% etc., it is not limited to cited Numerical value, other unrequited numerical value are equally applicable in the numberical range.

Preferably, the throwing tail yield that tail is thrown in the gravity treatment be 45%~55%, such as 45%, 47%, 50%, 53% or 55% etc., it is not limited to cited numerical value, other interior unrequited numerical value of the numberical range are equally applicable.

Preferably, the mass concentration of the coarse grain rough concentrate be 60wt%~80wt%, such as 60wt%, 63wt%, 65wt%, 67wt%, 70wt%, 73wt%, 75wt%, 77wt% or 80wt% etc., it is not limited to cited numerical value, Other unrequited numerical value are equally applicable in the numberical range.

Preferably, described broken using ball mill progress.

Preferably, the mog is that -0.074mm grades material content is 50wt%~60wt% in material, such as 50wt%, 53wt%, 55wt%, 57wt% or 60wt% etc., it is not limited to cited numerical value, in the numberical range its His unrequited numerical value is equally applicable.

Preferably, the mass concentration for the overflow product that the ore grinding obtains be 30wt%~50wt%, such as 30wt%, 33wt%, 35wt%, 37wt%, 40wt%, 43wt%, 45wt%, 47wt% or 50wt% etc., it is not limited to cited Numerical value, other unrequited numerical value are equally applicable in the numberical range.

Preferably, the Surface field intensity in step (1) the fair current magnetic separation roughing operation is >=300GS, such as 900GS, 950GS, 1000GS, 1050GS, 1100GS, 1150GS, 1200GS, 1500GS, 2000GS or 2500GS etc., but not It is only limitted to cited numerical value, other unrequited numerical value are equally applicable in the numberical range, preferably 900GS~1200GS.

Preferably, the magnetic field intensity in step (1) the selected operation of adverse current magnetic separation be >=300GS, such as 700GS, 710GS、720GS、730GS、740GS、750GS、760GS、780GS、790GS、800GS、1000GS、1050GS、1100GS、 1150GS, 1200GS, 1500GS, 2000GS or 2500GS etc., it is not limited to cited numerical value, in the numberical range its His unrequited numerical value is equally applicable, preferably 700GS~800GS.

Preferably, Iron grade > 65wt% in step (1) described iron ore concentrate, such as 66wt%, 68wt% or 70wt% etc., It is not limited to cited numerical value, other interior unrequited numerical value of the numberical range are equally applicable.

As currently preferred technical solution, step (2) described concentration includes dense with concentrator and/or taper Bucket carries out, but is not limited to institute's array apparatus.

Preferably, a concentration of 35wt%~40wt% for the underflow that step (2) described concentration obtains, such as 35wt%, 36wt%, 37wt%, 38wt%, 39wt% or 40wt% etc., it is not limited to cited numerical value, the numerical value Other unrequited numerical value are equally applicable in range.

In the present invention, the concentrated processing of tailing obtains water and underflow, and the underflow is the material after concentrating.

Preferably, described be blended in agitator carries out.

Preferably, the pH adjusting agent includes sulfuric acid.

Preferably, the foaming agent includes MIBC and/or BK204, and the MIBC is methyl isobutyl carbinol.

Preferably, the additive amount of the pH adjusting agent is 0~1000g/t, such as 10g/t, 50g/t, 100g/t, 300g/ T, 500g/t, 700g/t or 1000g/t etc., it is not limited to cited numerical value, other are unrequited in the numberical range Numerical value is equally applicable；The additive amount of the vulcanized sodium be 50g/t~200g/t, such as 50g/t, 70g/t, 100g/t, 130g/t, 150g/t, 170g/t or 200g/t etc., it is not limited to cited numerical value, other interior unrequited numerical value of the numberical range It is equally applicable；The additive amount of the collecting agent be 50g/t~200g/t, such as 50g/t, 70g/t, 100g/t, 130g/t, 150g/t, 170g/t or 200g/t etc., it is not limited to cited numerical value, other interior unrequited numerical value of the numberical range It is equally applicable；The additive amount of the foaming agent be 5g/t~50g/t, such as 5g/t, 10g/t, 20g/t, 30g/t, 40g/t or 50g/t etc., it is not limited to cited numerical value, other interior unrequited numerical value of the numberical range are equally applicable.

As currently preferred technical solution, in step (2) the first concentrate carry out at least 2 times it is selected obtain lead silver essence Mine, such as 2 times, 3 times, 4 times, 5 times or 6 are inferior, it is not limited to cited numerical value, other are unrequited in the numberical range Numerical value it is equally applicable.

Preferably, in step (2) the first concentrate carry out it is selected for the first time after obtain the second concentrate, the second concentrate further into Obtain lead silver preparation concentrate after row is selected, further carry out it is selected after obtained tailing come back for it is selected for the first time.Wherein, further Carry out it is selected be not limited to carry out primary cleaning.

Preferably, in the lead silver preparation concentrate that step (2) obtains lead grade be 40wt%~80wt%, such as 40wt%, 42wt%, 44wt%, 46wt%, 50wt%, 60wt%, 70wt% or 75wt% etc., it is not limited to cited numerical value, Other unrequited numerical value are equally applicable in the numberical range；Silver-colored grade is 300g/t~500g/t, such as 300g/t, 330g/ T, 350g/t, 370g/t, 400g/t, 430g/t, 450g/t, 470g/t or 500g/t etc., it is not limited to cited number Value, other interior unrequited numerical value of the numberical range are equally applicable.

Preferably, the lead recovery for the lead silver preparation concentrate that step (2) obtains be 70%~80%, such as 70%, 72%, 74%, 76%, 78% or 80% etc., it is not limited to cited numerical value, other interior unrequited numerical value of the numberical range It is equally applicable；Silver raising recovery rate is 40%~50%, such as 40%, 42%, 44%, 46%, 48% or 50% etc., but is simultaneously not only limited It is equally applicable in other unrequited numerical value in cited numerical value, the numberical range.

Preferably, the mass concentration for the third tailing that step (2) obtains be 20wt%~40wt%, such as 20wt%, 23wt%, 25wt%, 27wt%, 30wt%, 33wt%, 35wt%, 37wt% or 40wt% etc., it is not limited to cited Numerical value, other unrequited numerical value are equally applicable in the numberical range.

Preferably, described be blended in agitator carries out.

Preferably, the mixing carries out at least twice, preferably three times, as long as tailing and medicament are uniformly mixed.

As currently preferred technical solution, step (3) described roughing flotation includes at least 2 roughing flotations, such as 2 It is secondary, 3 times, 4 times or 5 inferior, it is not limited to cited numerical value, other unrequited numerical value are equally suitable in the numberical range With.

Preferably, third tailing obtains the 4th tailing after first time roughing flotation in step (3), and the 4th tailing is into traveling The roughing flotation of one step, the concentrate that concentrate that further roughing flotation obtains is obtained with third tailing through first time roughing flotation into The follow-up selected processing of row.Wherein, roughing flotation is further carried out to be not limited to carry out a roughing flotation.

Preferably, the 4th tailing carries out uranium product in the tailing that the tailing that further roughing flotation obtains obtains after scanning Position is 0.004%~0.005%, such as 0.004%, 0.0042%, 0.0044%, 0.0046%, 0.0048% or 0.005% Deng it is not limited to cited numerical value, other unrequited numerical value are equally applicable in the numberical range；Niobium pentaoxide Grade is 0.015%~0.018%, such as 0.015%, 0.016%, 0.017% or 0.018% etc., it is not limited to institute The numerical value enumerated, other interior unrequited numerical value of the numberical range are equally applicable.

Preferably, selected described in step (3) includes selected at least 2 times, such as 2 times, 3 times, 4 times or 5 are inferior, but not It is only limitted to cited numerical value, other unrequited numerical value are equally applicable in the numberical range.

Preferably, the 4th tailing carries out concentrate that further roughing flotation obtains and third tailing is thick through first time flotation Obtained concentrate is selected to carry out selected for the first time, the concentrate obtained after selected for the first time obtains uranium Biobium rare-earth after further selected and mixes Close concentrate.Wherein, further carry out it is selected be not limited to carry out primary cleaning.

As currently preferred technical solution, uranium grade is in the uranium Biobium rare-earth bulk concentrate obtained in step (3) 0.5wt%~1.2wt%, such as 0.5wt%, 0.6wt%, 0.7wt%, 1.0wt%, 1.1wt% or 1.2wt% etc., but simultaneously It is not limited only to cited numerical value, other unrequited numerical value are equally applicable in the numberical range；Niobium pentaoxide grade is 0.6wt%~1.2wt%, such as 0.6wt%, 0.7wt%, 0.8wt%, 0.9wt%, 1.0wt% or 1.1wt% etc., but simultaneously It is not limited only to cited numerical value, other unrequited numerical value are equally applicable in the numberical range；The product of total amount of the rare earth oxide Position is 1.2wt%~2.5wt%, such as 1.2wt%, 1.5wt%, 1.8wt% or 2.5wt% etc., it is not limited to listed The numerical value of act, other interior unrequited numerical value of the numberical range are equally applicable.

Preferably, the uranium rate of recovery 80%~95% of the uranium Biobium rare-earth bulk concentrate obtained in step (3), such as 80%, 83%, 85%, 87%, 90%, 93% or 95% etc., it is not limited to cited numerical value, in the numberical range, other are not The numerical value enumerated is equally applicable；The rate of recovery of niobium pentaoxide be 80%~95%, such as 80%, 83%, 85%, 87%, 90%, 93% or 95% etc., it is not limited to cited numerical value, other interior unrequited numerical value of the numberical range are equally suitable With；The rate of recovery of total amount of the rare earth oxide is 65%~70%, such as 65%, 66%, 67%, 68%, 69% or 70% etc., but It is not limited in cited numerical value, other unrequited numerical value are equally applicable in the numberical range.

The fair current magnetic separation roughing operation carries out in downstream-type magnet drum, and Surface field intensity is >=300GS；

The selected operation of adverse current magnetic separation carries out in adverse current type magnet drum, and Surface field intensity is >=300GS；

It is present invention typical case but non-limiting embodiment below：

Embodiment 1：

A kind of synthetical recovery beneficiation method of uranium-bearing polymetallic ore is present embodiments provided, the uranium-bearing polymetallic ore is certain Uranium niobium lead deposit belongs to based on uranium niobium lead, and (companion) has the ultra-large type of the mineral products such as gold, silver, bismuth, cadmium, barium strontium and rare earth altogether Hard Rock-type uranium deposit has the characteristics that scale is big, mineral are more, grade is low, buried depth is shallow, easy exploitation.Niobium in ore and the big portion of uranium Divide symbiosis in betafite, most of uranium bearing mineral combination is closer, and lead is mainly with galena output, and small part is with zinc powder Mineral products go out, and rare-earth mineral is mainly cerine.

As shown in Figure 1, the described method comprises the following steps：

(1) after raw ore being used jaw crusher and cone crushing successively, into high-pressure roller mill and vibrating screen Closed circuit flow is carried out, undersize is obtained and is the material of -3mm release meshes, then thrown in advance using gravity treatment after material is sized mixing Tail obtains coarse grain rough concentrate, throws tail yield 50%；

Obtained coarse grain rough concentrate is fed into ball mill and spiral classifier carries out closed circuit grinding, controls effluent concentration 40wt%, mog are that -0.074mm grades account for 55%；Overflow product feeds downstream-type magnet drum and carries out low intensity magnetic separation roughing, slightly Select magnetic field intensity be 1200GS, low intensity magnetic separation rougher concentration feed adverse current type magnet drum carry out low intensity magnetic separation it is selected, selected magnetic field intensity For 800GS, the iron ore concentrate and the first tailing of Iron grade 67% are obtained, most magnetic iron ores are recycled, and the first tailing includes Low intensity magnetic separation rougher tailings and low intensity magnetic separation cleaner tailings；

(2) the first tailing that step (1) obtains is fed into concentrator and carries out dense, a concentration of 35wt% of control thickened underflow Left and right, thickened underflow feed agitator as the flotation of lead silver to mine, and 7 or so, addition vulcanizes addition sulfuric acid control slurry pH Sodium, butyl xanthate and MIBC feed flotation device into quadrat silver direct flotation after medicament and ore pulp fully act on, and flotation obtains the first essence Mine and the second tailing, the first concentrate carry out it is selected for the first time after obtain the second concentrate, the second concentrate further carry out it is selected after To lead silver preparation concentrate, further carry out it is selected after obtained tailing come back for selected for the first time, the second tailing is scanned to obtain Third tailing, the tailing after the tailing and the second tailing obtained after the progress of the first concentrate is selected for the first time is scanned come back for Flotation；Lead grade 55wt%, silver-colored grade 430g/t, lead recovery 78%, silver raising recovery rate 50% in obtained lead silver preparation concentrate；

(3) the third tailing that step (2) obtains feeds three agitators, add successively gangue inhibitor CY-T and CY-C, Activator CY-L, pH regulator-sulfuric acid, collecting agent CB and foaming agent BK201 feed flotation after medicament and ore pulp fully act on Machine carries out uranium Biobium rare-earth mixing direct flotation, carries out 2 roughing flotations, and third tailing obtains the 4th tail after first time roughing flotation Mine, the 4th tailing carry out further roughing flotation, the concentrate that the tailing that further roughing flotation obtains obtains after scanning Come back for first time roughing flotation；The concentrate that 4th tailing is obtained through further roughing flotation is floating through first time with third tailing Select the concentrate that roughing obtains carry out 2 times it is selected, the concentrate obtained after selected for the first time through it is further it is selected after obtain uranium Biobium rare-earth Bulk concentrate, it is selected for the first time after obtained tailing with it is further selected after obtained tailing return mix with floating agent it is laggard Row roughing flotation；

Wherein, uranium grade 0.5561wt%, niobium pentaoxide grade in the uranium Biobium rare-earth bulk concentrate obtained 0.6845wt%, total amount of the rare earth oxide (REO) grade 1.2564wt%, the uranium rate of recovery 88.5%, the niobium pentaoxide rate of recovery 90%, the REO rate of recovery 67% is stripped of 91% calcium mineral.

Embodiment 2：

A kind of synthetical recovery beneficiation method of uranium-bearing polymetallic ore is present embodiments provided, the uranium-bearing polymetallic ore is certain Uranium-bearing, rare earth and the iron polymetallic ore in area, ore bearing vein rock are mainly granite arteries and veins, and uranium bearing mineral is mainly niobium titanium uranium in ore body Secondly mine is ulrichile and fergusonite, uranium bearing mineral is unevenly distributed, and is distributed in disseminated, granularity is very thin, largely contains Uranium mineral symbiosis is close, formed aggregate, the main preservation of rare-earth mineral in monazite, iron mainly in the form of magnetic iron ore exist, Lead mainly exists in the form of galena, followed by cerussite, and silver and cerussite Relationship Comparison are close.

It the described method comprises the following steps：

(1) after raw ore being used jaw crusher and cone crushing successively, into high-pressure roller mill and vibrating screen Closed circuit flow is carried out, undersize is obtained and is the material of -3.8mm release meshes, then is carried out using gravity treatment after material is sized mixing pre- It throws tail and obtains coarse grain rough concentrate, throw tail yield 55%；

Obtained coarse grain rough concentrate is fed into ball mill and spiral classifier carries out closed circuit grinding, controls effluent concentration 40wt%, mog are that -0.074mm grades account for 50%；Overflow product feeds downstream-type magnet drum and carries out low intensity magnetic separation roughing, slightly Select magnetic field intensity be 1200GS, low intensity magnetic separation rougher concentration feed adverse current type magnet drum carry out low intensity magnetic separation it is selected, selected magnetic field intensity For 800GS, the iron ore concentrate and the first tailing of Iron grade 65% are obtained, most magnetic iron ores are recycled, and the first tailing includes Low intensity magnetic separation rougher tailings and low intensity magnetic separation cleaner tailings；

(2) the first tailing that step (1) obtains is fed into concentrator and carries out dense, a concentration of 35wt% of control thickened underflow Left and right, thickened underflow feed agitator as the flotation of lead silver to mine, and addition sulfuric acid control slurry pH adds sulphur in 6-7 or so Change sodium, butyl xanthate and BK204, flotation device is fed after medicament and ore pulp fully act on into quadrat silver direct flotation, flotation obtains the One concentrate and the second tailing, the first concentrate carry out obtaining the second concentrate after first time is selected, and the second concentrate further carries out selected After obtain lead silver preparation concentrate, further carry out it is selected after obtained tailing come back for selected for the first time, the second tailing is scanned Third tailing is obtained, the tailing after the tailing and the second tailing obtained after the progress of the first concentrate is selected for the first time is scanned returns Carry out flotation；Lead grade 50wt%, silver-colored grade 350g/t, lead recovery 75%, silver raising recovery rate 45% in obtained lead silver preparation concentrate；

Wherein, uranium grade 0.5521wt%, niobium pentaoxide grade in the uranium Biobium rare-earth bulk concentrate obtained 0.6456wt%, total amount of the rare earth oxide (REO) grade 1.21wt%, the uranium rate of recovery 89.5%, the niobium pentaoxide rate of recovery 91%, the REO rate of recovery 72% is stripped of 88% calcium mineral.

Embodiment 3：

A kind of synthetical recovery beneficiation method of uranium-bearing polymetallic ore is present embodiments provided, the uranium-bearing polymetallic ore is certain Uranium-bearing, thorium, niobium, the rare earth polymetallic ore on ground, ore bearing vein rock are mainly migmatic pegmatite arteries and veins, and uranium content changes greatly in ore body, And size distribution is uneven, is distributed in disseminated, 60% uranium bearing mineral concentrates in+0.074mm grades, and uranium bearing mineral has niobium Brannerite, Chang Baikuang, broggerite, niobium-containing mineral are distributed mainly in betafite, next is distributed in fergusonite and niobium golden red Shi Zhong, rare-earth mineral are mainly cerine, and small part is monazite.Lead minerals is mainly galena, and iron-bearing mineral is mainly magnetic Iron ore, followed by pyrite and limonite, galena, magnetic iron ore and pyrite disseminated grain size are thicker, uranium-bearing, niobium mineral be relatively thin, Rare-earth mineral is most thin.

It the described method comprises the following steps：

(1) after raw ore being used jaw crusher and cone crushing successively, into high-pressure roller mill and vibrating screen Closed circuit flow is carried out, the material that undersize is -3mm release meshes is obtained, -0.074mm grain size contents are 15% in the material Left and right, then control feed ore concentration 25% after material is sized mixing and coarse grain rough concentrate, throwing tail yield are obtained using the pre- tail of throwing of gravity treatment progress 50%；

Obtained coarse grain rough concentrate is fed into ball mill and spiral classifier carries out closed circuit grinding, controls effluent concentration 40wt%, mog are that -0.074mm grades account for 55%；Overflow product feeds downstream-type magnet drum and carries out low intensity magnetic separation roughing, slightly Select magnetic field intensity be 940GS, low intensity magnetic separation rougher concentration feed adverse current type magnet drum carry out low intensity magnetic separation it is selected, selected magnetic field intensity is 700GS obtains the iron ore concentrate and the first tailing of Iron grade 66.5%, and most magnetic iron ores are recycled, and the first tailing includes Low intensity magnetic separation rougher tailings and low intensity magnetic separation cleaner tailings；

(2) the first tailing that step (1) obtains is fed into concentrator and carries out dense, a concentration of 38wt% of control thickened underflow Left and right, thickened underflow feed agitator as the flotation of lead silver to mine, and addition sulfuric acid control slurry pH adds sulphur 6.5 or so Change sodium, butyl xanthate+ethyl xanthogenate and MIBC, flotation device is fed after medicament and ore pulp fully act on into quadrat silver direct flotation, flotation Obtain the first concentrate and the second tailing, the first concentrate carry out it is selected for the first time after obtain the second concentrate, the second concentrate further into Obtain lead silver preparation concentrate after row is selected, further carry out it is selected after obtained tailing come back for it is selected for the first time, the second tailing into Row scans to obtain third tailing, the first concentrate carry out it is selected for the first time after obtained tailing and the second tailing scanned after tail Mine comes back for flotation；Lead grade 53wt%, silver-colored grade 420g/t, lead recovery 78wt%, silver return in obtained lead silver preparation concentrate Yield 51%；

Wherein, uranium grade 0.5235wt%, niobium pentaoxide grade in the uranium Biobium rare-earth bulk concentrate obtained 0.6561wt%, total amount of the rare earth oxide (REO) grade 1.23wt%, the uranium rate of recovery 90.5%, the niobium pentaoxide rate of recovery 90%, the REO rate of recovery 65% is stripped of 90% calcium mineral.

Embodiment 4：

A kind of synthetical recovery beneficiation method of uranium-bearing polymetallic ore is present embodiments provided, the method is with reference to embodiment 1 Middle method, differs only in：Roughing magnetic field intensity is 900GS in step (1), and selected magnetic field intensity is 750GS.

The iron ore concentrate Iron grade that the present embodiment is handled is close with embodiment 1 with iron recovery.

Comparative example 1：

This comparative example provides a kind of synthetical recovery beneficiation method of uranium-bearing polymetallic ore, and the method is with reference to embodiment 1 Middle method, differs only in：The fair current magnetic separation roughing and fair current magnetic separation carried out in step (1) is selected, i.e. magnetic separation twice is suitable Stream.

This comparative example can be such that iron ore concentrate Iron grade is reduced to 65% hereinafter, iron is smart since magnetic separation twice is fair current magnetic separation Mine uranium content reaches 50g/t, and iron ore concentrate uranium content is exceeded.

Comparative example 2：

This comparative example provides a kind of synthetical recovery beneficiation method of uranium-bearing polymetallic ore, and the method is with reference to embodiment 1 Middle method, differs only in：The adverse current magnetic separation roughing and adverse current magnetic separation carried out in step (1) is selected, i.e. magnetic separation twice is inverse Stream.

This comparative example can be such that the rate of recovery of Armco magnetic iron in iron ore concentrate is reduced from 98% since magnetic separation twice is adverse current magnetic separation To 80%.

Comparative example 3：

This comparative example provides a kind of synthetical recovery beneficiation method of uranium-bearing polymetallic ore, and the method is with reference to embodiment 1 Middle method, differs only in：Uranium niobium minerals is first recycled to the first tailing after magnetic separation twice, recycling lead silver ore that is, will step Suddenly the sequence of (2) and step (3) is exchanged.

This comparative example can make most of lead silver enter the mixing of uranium Biobium rare-earth due to recycling lead silver ore after first recycling uranium niobium minerals In concentrate, lead silver cannot get sufficient synthetical recovery.The operation recovery only 20% of lead silver preparation concentrate lead, uranium Biobium rare-earth bulk concentrate Uranium grade be reduced to 0.3% or less.

Can be seen that the present invention with comparative example based on the above embodiments can obtain the iron ore concentrate of 65% or more Iron grade, Most magnetic iron ores are made to be recycled；Leaded grade 40wt~80wt%, silver-colored grade 300g/t~500g/ in lead silver preparation concentrate T, lead recovery 80% or so, silver raising recovery rate 40%-50%；Uranium-bearing grade 0.5wt% in uranium Biobium rare-earth bulk concentrate~ 1.2wt%, niobium pentaoxide grade 0.6wt%~1.2wt%, total amount of the rare earth oxide (REO) grade 1.2wt%~ 1.5wt%, the uranium rate of recovery 90% or so, the niobium pentaoxide rate of recovery 90% or so, the REO rate of recovery 65%~70%, is stripped of 90% or so calcium mineral, technical-economic index is good, and significantly reduces the production of follow-up hydrometallurgy SEPARATION OF URANIUM, niobium and rare earth Cost.

Applicant declares, and the present invention illustrates the detailed applications method of the present invention by above-described embodiment, but the present invention is simultaneously It is not limited to above-mentioned detailed applications method, that is, does not mean that the present invention has to rely on above-mentioned method detailed and could implement.Affiliated skill The technical staff in art field is it will be clearly understood that any improvement in the present invention, to the equivalence replacement and auxiliary of products material of the present invention The addition of ingredient, the selection etc. of concrete operations condition and mode, all fall within protection scope of the present invention and the open scope.

Claims

1. a kind of synthetical recovery beneficiation method of uranium-bearing polymetallic ore, which is characterized in that the described method comprises the following steps：

(1) the overflow product that uranium-bearing polymetallic ore is obtained through ore grinding is subjected to fair current magnetic separation roughing operation and adverse current magnetic separation essence successively It is elected to be industry, obtains iron ore concentrate and the first tailing；

(2) tailing that step (1) obtains is concentrated and flotation obtains the first concentrate and the second tailing, the first concentrate carries out selected Lead silver preparation concentrate is obtained, the second tailing is scanned to obtain third tailing；

2. synthetical recovery beneficiation method according to claim 1, which is characterized in that step further includes in (1)：Contain by described in Uranium polymetallic ore is crushed, is sieved, sized mixing and throw tail with gravity treatment, coarse grain rough concentrate and particulate rough concentrate is obtained, by the coarse grain The overflow product that rough concentrate is obtained through ore grinding carries out fair current magnetic separation roughing operation and the selected operation of adverse current magnetic separation successively；

Preferably, described broken including using any one in jaw crusher, gyratory crusher or high-pressure roller mill or at least Two kinds are handled, and preferably first jaw crusher and gyratory crusher are used to be handled, then at high-pressure roller mill Reason；

Preferably, material of the output grain size less than 4mm after the screening；

Preferably, -0.074mm grades material content < 20wt% in the material of output after the screening；

Preferably, it is described size mixing after the pulp density that controls be 20wt%~40wt%；

Preferably, the throwing tail yield that tail is thrown in the gravity treatment is 45%~55%；

3. synthetical recovery beneficiation method according to claim 1 or 2, which is characterized in that step (1) described ore grinding includes broken Broken and classification processing；

Preferably, described broken using ball mill progress；

Preferably, the classification processing is carried out using spiral classifier；

Preferably, the mog is that -0.074mm grades material content is 50wt%~60wt% in material；

4. according to claim 1-3 any one of them synthetical recovery beneficiation methods, which is characterized in that fair current magnetic in step (1) Roughing operation is selected to be carried out in downstream-type magnet drum；

Preferably, the concentrate that step (1) the fair current magnetic separation roughing operation obtains carries out the selected operation of adverse current magnetic separation, obtained tail Mine carries out the processing procedure in step (2)；

Preferably, Surface field intensity >=300GS in step (1) the fair current magnetic separation roughing operation, preferably 900GS~ 1200GS；

Preferably, step (1) the selected operation of adverse current magnetic separation carries out in adverse current type magnet drum；

Preferably, step (1) the selected operation of adverse current magnetic separation obtains iron ore concentrate；

Preferably, Surface field intensity >=300GS in step (1) the selected operation of adverse current magnetic separation, preferably 700GS~ 800GS；

Preferably, Iron grade > 65wt% in step (1) described iron ore concentrate；

Preferably, step (1) first tailing includes tailing and the selected operation of adverse current magnetic separation of fair current magnetic separation roughing operation Tailing.

5. according to claim 1-4 any one of them synthetical recovery beneficiation methods, which is characterized in that step (2) described concentration Processing includes being carried out with concentrator and/or the dense bucket of taper；

Preferably, a concentration of 35wt%~40wt% for the underflow that step (2) described concentration obtains；

Preferably, the underflow obtained after tailing is concentrated in step (2) carries out flotation after being mixed with floating agent；

Preferably, described be blended in agitator carries out；

Preferably, the floating agent includes pH adjusting agent, vulcanized sodium, collecting agent and foaming agent；

Preferably, the pH adjusting agent includes sulfuric acid；

Preferably, the collecting agent includes any one in butyl xanthate, ethyl xanthogenate or black powder or at least two combination；

Preferably, the foaming agent includes MIBC and/or BK204；

Preferably, the additive amount of the pH adjusting agent is 0~1000g/t, and the additive amount of the vulcanized sodium is 50g/t~200g/ The additive amount of t, the collecting agent are 50g/t~200g/t, and the additive amount of the foaming agent is 5g/t~50g/t.

6. according to claim 1-5 any one of them synthetical recovery beneficiation methods, which is characterized in that the first essence in step (2) Mine carries out selected obtaining lead silver preparation concentrate at least 2 times；

Preferably, the first concentrate carries out obtaining the second concentrate after first time is selected in step (2), and the second concentrate further carries out essence Lead silver preparation concentrate is obtained after choosing, further carry out it is selected after obtained tailing come back for it is selected for the first time；

Preferably, the first concentrate carry out it is selected for the first time after obtained tailing and the second tailing scanned after tailing return into Row flotation；

Preferably, in the lead silver preparation concentrate that step (2) obtains lead grade be 40wt%~80wt%, silver-colored grade be 300g/t~ 500g/t；

Preferably, the lead recovery for the lead silver preparation concentrate that step (2) obtains is 70%~80%, and silver raising recovery rate is 40%~50%；

7. according to claim 1-6 any one of them synthetical recovery beneficiation methods, which is characterized in that third tail in step (3) Mine carries out roughing flotation after being mixed with floating agent；

Preferably, described be blended in agitator carries out；

Preferably, the mixing carries out at least twice, preferably three times；

Preferably, the floating agent includes gangue inhibitor, activator, pH regulators, collecting agent and foaming agent；

Preferably, when being mixed into three times, gangue inhibitor, second of addition activator are added for the first time, and third time adds pH Regulator, collecting agent and foaming agent.

8. according to claim 1-7 any one of them synthetical recovery beneficiation methods, which is characterized in that step (3) described flotation Roughing includes at least 2 roughing flotations；

Preferably, third tailing obtains the 4th tailing after first time roughing flotation in step (3), and the 4th tailing carries out further Roughing flotation, after the concentrate that concentrate that further roughing flotation obtains is obtained with third tailing through first time roughing flotation carries out Continue selected processing；

Preferably, the 4th tailing carries out the concentrate that the tailing that further roughing flotation obtains obtains after scanning and comes back for Roughing flotation；

Preferably, the 4th tailing carries out uranium grade in the tailing that the tailing that further roughing flotation obtains obtains after scanning and is 0.004%~0.005%, the grade of niobium pentaoxide is 0.015%~0.018%；

Preferably, selected described in step (3) includes selected at least 2 times；

Preferably, the 4th tailing carries out the concentrate that further roughing flotation obtains and is obtained through first time roughing flotation with third tailing The concentrate that arrives carries out selected for the first time, and it is smart that the concentrate obtained after selected for the first time obtains the mixing of uranium Biobium rare-earth after further selected Mine；

Preferably, the 4th tailing carries out the concentrate that further roughing flotation obtains and is obtained through first time roughing flotation with third tailing The concentrate that arrives carry out it is selected for the first time, the tailing obtained after selected for the first time with it is further it is selected after obtained tailing come back for Roughing flotation preferably returns and carries out roughing flotation after being mixed with floating agent.

9. according to claim 1-8 any one of them synthetical recovery beneficiation methods, which is characterized in that obtained in step (3) Uranium grade is 0.5wt%~1.2wt% in uranium Biobium rare-earth bulk concentrate, and niobium pentaoxide grade is 0.6wt%~1.2wt%, The grade of total amount of the rare earth oxide is 1.2wt%~2.5wt%；

Preferably, the uranium rate of recovery 80%~95% of the uranium Biobium rare-earth bulk concentrate obtained in step (3), niobium pentaoxide return Yield is 80%~95%, and the rate of recovery of total amount of the rare earth oxide is 65%~70%.

10. according to claim 1-9 any one of them synthetical recovery beneficiation methods, which is characterized in that the method includes with Lower step：

(1) uranium-bearing polymetallic ore be crushed, sieved, sized mixing and throw tail with gravity treatment, obtaining coarse grain rough concentrate and particulate rough concentrate, The overflow product that the coarse grain rough concentrate is obtained through ore grinding is subjected to fair current magnetic separation roughing operation and the selected work of adverse current magnetic separation successively Industry, obtains the iron ore concentrate and the first tailing of Iron grade > 65wt%, the first tailing include fair current magnetic separation roughing operation tailing and The tailing of the selected operation of adverse current magnetic separation；

Wherein, be crushed includes first jaw crusher and gyratory crusher being used to be handled, then handled with high-pressure roller mill； Output grain size is less than the material of 4mm, -0.074mm grades material content < 20wt% in the material of output after screening after screening；It adjusts The pulp density controlled after slurry is 20wt%~40wt%；The throwing tail yield that tail is thrown in gravity treatment is 45%~55%；Coarse grain is thick The mass concentration of concentrate is 60wt%~80wt%；

The ore grinding includes broken and classification processing, is crushed and is carried out using ball mill, and classification processing is carried out using spiral classifier, Mog is that -0.074mm grades material content is 50wt%~60wt%, the quality for the overflow product that ore grinding obtains in material A concentration of 30wt%~50wt%；

(2) tailing for obtaining step (1) carries out concentration through concentrator and/or the dense bucket of taper, what concentration obtained The underflow of a concentration of 35wt%~40wt% carries out flotation after being mixed in agitator with floating agent, and flotation obtains first Concentrate and the second tailing, the first concentrate carry out it is selected for the first time after obtain the second concentrate, the second concentrate further carry out it is selected after Obtain lead silver preparation concentrate, further carry out it is selected after obtained tailing come back for selected for the first time, the second tailing scan To the third tailing that mass concentration is 20wt%~40wt%, the first concentrate carries out the tailing and second obtained after first time is selected Tailing after tailing is scanned comes back for flotation；

Wherein, floating agent includes pH adjusting agent, vulcanized sodium, collecting agent and foaming agent；Lead grade is 40wt% in lead silver preparation concentrate ~80wt%, silver-colored grade are 300g/t~500g/t, and lead recovery is 70%~80%, and silver raising recovery rate is 40%~50%；

(3) it is thick that 2 flotation are carried out after being mixed the third tailing that step (2) obtains three times in agitator with floating agent Choosing, third tailing obtain the 4th tailing after first time roughing flotation, and the 4th tailing carries out further roughing flotation, further The concentrate that is obtained after scanning of the obtained tailing of roughing flotation come back for first time roughing flotation, the 4th tailing is into advancing one Uranium grade is 0.004%~0.005% in the tailing that the tailing that the roughing flotation of step obtains obtains after scanning, niobium pentaoxide Grade be 0.015%~0.018%；The concentrate that 4th tailing is obtained through further roughing flotation is with third tailing through for the first time Concentrate that roughing flotation obtains carry out 2 times it is selected, the concentrate obtained after selected for the first time through it is further it is selected after to obtain uranium niobium dilute Native bulk concentrate, it is selected for the first time after obtained tailing with it is further selected after after obtained tailing returns and mixed with floating agent Carry out roughing flotation；

Wherein, floating agent includes gangue inhibitor, activator, pH regulators, collecting agent and foaming agent, obtained uranium Biobium rare-earth Uranium grade is 0.5wt%~1.2wt% in bulk concentrate, and niobium pentaoxide grade is 0.6wt%~1.2wt%, rare-earth oxidation The grade of object total amount is 1.2wt%~2.5wt%, the uranium rate of recovery 80%~95%, the rate of recovery of niobium pentaoxide is 80%~ 95%, the rate of recovery of total amount of the rare earth oxide is 65%~70%.