CN109174432A - Low-grade uranium ore heavy liquid enrichment method - Google Patents
Low-grade uranium ore heavy liquid enrichment method Download PDFInfo
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- CN109174432A CN109174432A CN201810754653.7A CN201810754653A CN109174432A CN 109174432 A CN109174432 A CN 109174432A CN 201810754653 A CN201810754653 A CN 201810754653A CN 109174432 A CN109174432 A CN 109174432A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B5/00—Washing granular, powdered or lumpy materials; Wet separating
- B03B5/28—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation
- B03B5/30—Washing granular, powdered or lumpy materials; Wet separating by sink-float separation using heavy liquids or suspensions
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Abstract
The invention discloses a method for enriching heavy liquor of low-grade uranium ore, which comprises the following steps: (1) the raw ore is subjected to coarse crushing and fine crushing and then is screened to obtain ore with the granularity range of 0.1-3mm, the ore with the granularity larger than 3mm is returned to be fine crushed, and the ore smaller than 0.1mm is treated as tailings; (2) and (2) feeding the ore obtained in the step (1) into heavy liquid separation equipment, enriching uranium-containing minerals through heavy liquid, and separating the uranium-containing minerals from gangue minerals to obtain uranium concentrate and uranium tailings, wherein the heavy minerals are the uranium concentrate, and the light minerals are the uranium tailings. The method has the advantages of simple operation, high separation precision, high enrichment ratio and the like, and the precision of heavy liquid separation can reach 0.1 specific gravity difference; and the equipment is simple, and the heavy liquid can be recycled.
Description
Technical field
The invention belongs to uranium ore sorting technology fields, and in particular to a kind of low-grade uranium ore heavy-fluid enrichment method.
Background technique
Uranium resource is the basic material of the important strategic resource in China and energy minerals and the development of China's nuclear industry.I
State is a uranium ore resource country not very abundant, has found out that resource is distributed mainly on national 23 provinces, municipalities and autonomous regions, mineral deposit
Type mainly has granite type, Volcanic-type, sandrock-type, carbon silicon mud stone 4 kinds of uranium deposits of type, and minerogenetic conditions is complicated.China
Uranium deposit it is middle-size and small-size (accounting for 91.7%) in the majority, and the grade of ore is based on middle-low grade, mineral deposit average grade accounting for lower than 0.3%
96.7%, mineralising is uneven, and coefficient of variation of grade is big, is in the distribution of great-jump-forward between grade, barren rock content is big, there is considerable part
Uranium deposit contains a variety of accompanying elements and component, unfavorable to hydrometallurgy, it is necessary to carry out ore dressing preenrichment, then is leached and is extracted
Uranium final products can just be obtained out.
Currently, the beneficiation method for handling low-grade uranium ore mainly has radiometric sorting, gravity ore magnetic separation and flotation.It puts
The ore grain size upper limit of penetrating property sorting process is 250~300mm, and lower limit is 20~30mm, and is directed to symbiosis and compares
Simple single uranium ore.The low-grade uraniferous polymetallic ore in China in addition to uranium-bearing, also usually with gold, silver, bismuth, cadmium, barium strontium, dilute
Soil etc. is total to association, is difficult to carry out valuable mineral synthetical recovery by radiometric sorting, and uses conventional gravity treatment, magnetic selection method
Tail preenrichment is thrown, sharpness of separation is not high, it is difficult to achieve the purpose that throw tail.Method for floating mainly for the treatment of particulate sorting.
Therefore, the high low-grade uranium ore technique of preparing of simple process, sharpness of separation is problem to be solved.
Heavy-liquid concentration is a kind of gravity separation method, may be implemented to float the mineral for being lighter than heavy-fluid by adjusting heavy-fluid specific gravity
It rises, and the mineral for overweighting heavy-fluid sink, to realize the separation of light mineral and heavy mineral.The high, simple process with sharpness of separation
The advantages that.
Summary of the invention
Based on the problems of prior art, the object of the present invention is to provide a kind of low-grade uranium ore heavy-fluid enrichment sides
Method.
The object of the present invention is achieved in the following manner:
A kind of low-grade uranium ore heavy-fluid enrichment method, comprising the following steps:
(1) raw ore by coarse crushing and it is fine crushing after sieved, obtain the ore that particle size range is 0.1-3mm, granularity is greater than 3mm
Ore return is fine crushing, and the ore less than 0.1mm is as tailings glass；
(2) the resulting ore of step (1) is sent into heavy-fluid separation equipment, by heavy-fluid by uranium bearing mineral be enriched with and with gangue mine
Object separation, obtains uranium concentrate and Uranium tailings, and wherein heavy mineral is uranium concentrate, and light mineral is Uranium tailings.
The density of the heavy-fluid is 2.4-3.325g/cm3。
The heavy-fluid is diiodomethane, tetrabromoethane, bromoform, three Bromofluoromethanes or methylene bromide or five kinds above-mentioned
The miscible body of at least one of substance and alcohol.
The time of the heavy-fluid separation is 5-60min.
Raw ore is broken in first progress after coarse crushing in step (1), then carries out fine crushing.
The coarse smash equipment is jaw crusher.
The fine crushing device is double-roll crusher.
Broken equipment is gyratory crusher in described.
Compared with the existing technology, the present invention has many advantages, such as that easy to operate, sharpness of separation is high, concentration ratio is high, heavy-liquid concentration
Precision can reach 0.1 difference in specific gravity；And equipment is simple, heavy-fluid is Ke Xunhuanliyong.
Detailed description of the invention
Fig. 1 is heavy-liquid concentration experiment process figure.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, combined with specific embodiments below to this
Invention is described in detail, the description of this part be only it is exemplary and explanatory, should not have to protection scope of the present invention any
Restriction effect.
Coarse smash equipment is jaw crusher, and granularity is generally 10-30mm after coarse crushing；In broken equipment be gyratory crusher, carefully
Broken equipment is generally double-roll crusher, and fine granularity is generally 1-5mm；Screening plant is vibrating screen, and screen mesh size is respectively
3mm、0.1mm。
Uranium bearing mineral is heavy mineral, and gangue mineral is usually aluminium silicate mineral, and density is relatively small；By adjusting weight
The density of liquid, the uranium bearing mineral that density can be made big sink, the then floating of the small gangue mineral of density.
Embodiment 1:
A kind of low-grade uranium ore heavy-fluid enrichment method, comprising the following steps:
(1) raw ore by coarse crushing and it is fine crushing after sieved, obtain the ore that particle size range is 0.1-3mm, granularity is greater than 3mm
Ore return is fine crushing, and the ore less than 0.1mm is as tailings glass；
(2) the resulting ore of step (1) is sent into heavy-fluid separation equipment, by heavy-fluid by uranium bearing mineral be enriched with and with gangue mine
Object separation, heavy-fluid disengaging time are 5-60min, obtain uranium concentrate and Uranium tailings, and wherein heavy mineral is uranium concentrate, and light mineral is uranium
Tailing.
The density of the heavy-fluid is 2.4-3.325g/cm3。
The heavy-fluid is diiodomethane (density 3.325g/cm3), tetrabromoethane (density be 2.967 g/cm3), tribromo
(density is 2.89 g/cm to methane3), three Bromofluoromethanes (density be 2.765 g/cm3) or methylene bromide (density be 2.48 g/
cm3) or miscible body with alcohol of at least one of above-mentioned five kinds of substances.
Coarse smash equipment is jaw crusher, and fine crushing device is double-roll crusher.
Embodiment 2:
A kind of low-grade uranium ore heavy-fluid enrichment method, comprising the following steps:
(1) raw ore by coarse crushing, in it is broken and fine crushing after sieved, obtain the ore that particle size range is 0.1-3mm, granularity is greater than
The ore return of 3mm is fine crushing, and the ore less than 0.1mm is as tailings glass；
(2) the resulting ore of step (1) is sent into heavy-fluid separation equipment, by heavy-fluid by uranium bearing mineral be enriched with and with gangue mine
Object separation, heavy-fluid disengaging time are 5-60min, obtain uranium concentrate and Uranium tailings, and wherein heavy mineral is uranium concentrate, and light mineral is uranium
Tailing.
The density of the heavy-fluid is 2.4-3.325g/cm3。
The heavy-fluid is that (density is 3.2-3.32 g/cm to diiodomethane3), tetrabromoethane (density be 2.85-2.97 g/
cm3), bromoform (density be 2.80-2.92 g/cm3), three Bromofluoromethanes (density be 2.765 g/cm3) or methylene bromide
(density is 2.48 g/cm3) or miscible body with alcohol of at least one of above-mentioned five kinds of substances.
Coarse smash equipment is jaw crusher, and fine crushing device is double-roll crusher, in broken equipment be gyratory crusher.
Embodiment 3:
A kind of low-grade uranium ore heavy-fluid enrichment method, comprising the following steps:
(1) raw ore by coarse crushing and it is fine crushing after sieved, obtain the ore that particle size range is 0.1-3mm, granularity is greater than 3mm
Ore return is fine crushing, and the ore less than 0.1mm is as tailings glass；
(2) the resulting ore of step (1) is sent into heavy-fluid separation equipment, by heavy-fluid by uranium bearing mineral be enriched with and with gangue mine
Object separation, heavy-fluid disengaging time are 5min, obtain uranium concentrate and Uranium tailings, and wherein heavy mineral is uranium concentrate, and light mineral is uranium tail
Mine.
The density of the heavy-fluid is 2.4g/cm3, heavy-fluid is the miscible body of methylene bromide and alcohol.
Coarse smash equipment is jaw crusher, and fine crushing device is double-roll crusher.
Embodiment 4:
A kind of low-grade uranium ore heavy-fluid enrichment method, comprising the following steps:
(1) raw ore by coarse crushing and it is fine crushing after sieved, obtain the ore that particle size range is 0.1-3mm, granularity is greater than 3mm
Ore return is fine crushing, and the ore less than 0.1mm is as tailings glass；
(2) the resulting ore of step (1) is sent into heavy-fluid separation equipment, by heavy-fluid by uranium bearing mineral be enriched with and with gangue mine
Object separation, heavy-fluid disengaging time are 10min, obtain uranium concentrate and Uranium tailings, and wherein heavy mineral is uranium concentrate, and light mineral is uranium tail
Mine.
The density of the heavy-fluid is 2.48g/cm3, heavy-fluid is methylene bromide.
Coarse smash equipment is jaw crusher, and fine crushing device is double-roll crusher.
Embodiment 5:
A kind of low-grade uranium ore heavy-fluid enrichment method, comprising the following steps:
(1) raw ore by coarse crushing and it is fine crushing after sieved, obtain the ore that particle size range is 0.1-3mm, granularity is greater than 3mm
Ore return is fine crushing, and the ore less than 0.1mm is as tailings glass；
(2) the resulting ore of step (1) is sent into heavy-fluid separation equipment, by heavy-fluid by uranium bearing mineral be enriched with and with gangue mine
Object separation, heavy-fluid disengaging time are 20min, obtain uranium concentrate and Uranium tailings, and wherein heavy mineral is uranium concentrate, and light mineral is uranium tail
Mine.
The density of the heavy-fluid is 2.765g/cm3, heavy-fluid is three Bromofluoromethanes.
Coarse smash equipment is jaw crusher, and fine crushing device is double-roll crusher.
Embodiment 6:
A kind of low-grade uranium ore heavy-fluid enrichment method, comprising the following steps:
(1) raw ore by coarse crushing, in it is broken and fine crushing after sieved, obtain the ore that particle size range is 0.1-3mm, granularity is greater than
The ore return of 3mm is fine crushing, and the ore less than 0.1mm is as tailings glass；
(2) the resulting ore of step (1) is sent into heavy-fluid separation equipment, by heavy-fluid by uranium bearing mineral be enriched with and with gangue mine
Object separation, heavy-fluid disengaging time are 30min, obtain uranium concentrate and Uranium tailings, and wherein heavy mineral is uranium concentrate, and light mineral is uranium tail
Mine.
The density of the heavy-fluid is 2.89g/cm3, heavy-fluid is bromoform.
Coarse smash equipment is jaw crusher, and fine crushing device is double-roll crusher, in broken equipment be gyratory crusher.
Embodiment 7:
A kind of low-grade uranium ore heavy-fluid enrichment method, comprising the following steps:
(1) raw ore by coarse crushing, in it is broken and fine crushing after sieved, obtain the ore that particle size range is 0.1-3mm, granularity is greater than
The ore return of 3mm is fine crushing, and the ore less than 0.1mm is as tailings glass；
(2) the resulting ore of step (1) is sent into heavy-fluid separation equipment, by heavy-fluid by uranium bearing mineral be enriched with and with gangue mine
Object separation, heavy-fluid disengaging time are 40min, obtain uranium concentrate and Uranium tailings, and wherein heavy mineral is uranium concentrate, and light mineral is uranium tail
Mine.
The density of the heavy-fluid is 2.967g/cm3, heavy-fluid is tetrabromoethane.
Coarse smash equipment is jaw crusher, and fine crushing device is double-roll crusher, in broken equipment be gyratory crusher.
Embodiment 8:
A kind of low-grade uranium ore heavy-fluid enrichment method, comprising the following steps:
(1) raw ore by coarse crushing, in it is broken and fine crushing after sieved, obtain the ore that particle size range is 0.1-3mm, granularity is greater than
The ore return of 3mm is fine crushing, and the ore less than 0.1mm is as tailings glass；
(2) the resulting ore of step (1) is sent into heavy-fluid separation equipment, by heavy-fluid by uranium bearing mineral be enriched with and with gangue mine
Object separation, heavy-fluid disengaging time are 50min, obtain uranium concentrate and Uranium tailings, and wherein heavy mineral is uranium concentrate, and light mineral is uranium tail
Mine.
The density of the heavy-fluid is 3.325 g/cm3, heavy-fluid is diiodomethane.
Coarse smash equipment is jaw crusher, and fine crushing device is double-roll crusher, in broken equipment be gyratory crusher.
Embodiment 9:
A kind of low-grade uranium ore heavy-fluid enrichment method, comprising the following steps:
(1) raw ore by coarse crushing, in it is broken and fine crushing after sieved, obtain the ore that particle size range is 0.1-3mm, granularity is greater than
The ore return of 3mm is fine crushing, and the ore less than 0.1mm is as tailings glass；
(2) the resulting ore of step (1) is sent into heavy-fluid separation equipment, by heavy-fluid by uranium bearing mineral be enriched with and with gangue mine
Object separation, heavy-fluid disengaging time are 60min, obtain uranium concentrate and Uranium tailings, and wherein heavy mineral is uranium concentrate, and light mineral is uranium tail
Mine.
The density of the heavy-fluid is 3.2 g/cm3, heavy-fluid is the miscible body of diiodomethane and alcohol.
Coarse smash equipment is jaw crusher, and fine crushing device is double-roll crusher, in broken equipment be gyratory crusher.
Embodiment 10:
The present embodiment provides a kind of low-grade uranium ore heavy-fluid enrichment method, specifically:
Certain uranium niobium lead deposit is one based on uranium, niobium, lead ore, and (companion) has the mineral products such as gold, silver, bismuth, cadmium, barium strontium, rare earth altogether
Low-grade, ultra-large type uranium polymetallic deposit, sample ore ingredient is shown in Table 1.
Sample broke to granularity is less than by 3mm using jaw crusher and double-roll crusher, and screens out 0.1- with sieve
Then 3mm grade ore is 2.8 g/cm in density3Heavy-fluid tetrabromoethane (volume fraction 95%), bromoform (volume
Score is to sort 1%) and in the miscible body of alcohol (volume fraction 4%), and experiment process figure is shown in Fig. 1, and test result is shown in Table 2.
Test result shows that heavy-liquid concentration has preferable enrichment to the ore, as a whole, the U being enriched in heavy mineral
Grade is 2575.4g/t, and concentration ratio 12.15, the rate of recovery is 70% or so, while the Nb of association2O5Also reach with Pb concentration ratio
10 or more, the rate of recovery is all larger than 60%.Realize that enrichment, the sorting purpose of low-grade uranium ore, this method have simple process, divide
Select the features such as precision is high, concentration ratio is high.
Embodiment 11:
The present embodiment provides a kind of low-grade uranium ore heavy-fluid enrichment method, specifically:
Certain low-grade uranium ore, sample ore ingredient are shown in Table 3.
Using jaw crusher, gyratory crusher and double-roll crusher successively to sample carry out coarse crushing, in it is broken and fine crushing, and
The ore sizing that granularity is 0.1-3mm is come out with sieve, ore of the granularity greater than 3mm returns to fine crushing, the ore less than 0.1mm
As tailings glass；It then is 2.6g/cm in specific gravity3Heavy-fluid methylene bromide (volume fraction 9%), three Bromofluoromethane (volumes
40%) score is, is sorted in the miscible body of bromoform (volume fraction 45%) and alcohol (volume fraction 6%), test
Flow chart is shown in Fig. 1, and test result is shown in Table 4.
Test result shows that U is mainly enriched in heavy mineral, concentration ratio 9.23, and U grade is 1452.6g/ in heavy mineral
T, the rate of recovery is 66.39% or so, while the Nb of association2O5Good enrichment has been obtained with Pb pages.Realize low-grade uranium ore
Enrichment, sorting purpose, this method have the characteristics that simple process, sharpness of separation are high, concentration ratio is high.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or equipment for including a series of elements not only includes those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or equipment institute it is intrinsic
Element.
Used herein a specific example illustrates the principle and implementation of the invention, the explanation of above example
It is merely used to help understand method and its core concept of the invention.The above is only a preferred embodiment of the present invention, it answers
When pointing out due to the finiteness of literal expression, and objectively there is unlimited specific structure, for the common skill of the art
For art personnel, without departing from the principle of the present invention, several improvement, retouching or variation can also be made, can also incited somebody to action
Above-mentioned technical characteristic is combined in the right way；These improve retouching, variation or combination, or the not improved structure by invention
Think and technical solution directly applies to other occasions, is regarded as protection scope of the present invention.
Claims (8)
1. a kind of low-grade uranium ore heavy-fluid enrichment method, it is characterised in that: the following steps are included:
(1) raw ore by coarse crushing and it is fine crushing after sieved, obtain the ore that particle size range is 0.1-3mm, granularity is greater than 3mm
Ore return is fine crushing, and the ore less than 0.1mm is as tailings glass；
(2) the resulting ore of step (1) is sent into heavy-fluid separation equipment, by heavy-fluid by uranium bearing mineral be enriched with and with gangue mine
Object separation, obtains uranium concentrate and Uranium tailings, and wherein heavy mineral is uranium concentrate, and light mineral is Uranium tailings.
2. low-grade uranium ore heavy-fluid enrichment method according to claim 1, it is characterised in that: the density of the heavy-fluid is
2.4-3.325g/cm3。
3. low-grade uranium ore heavy-fluid enrichment method according to claim 2, it is characterised in that: the heavy-fluid is diiodo- first
At least one of alkane, tetrabromoethane, bromoform, three Bromofluoromethanes or methylene bromide or above-mentioned five kinds of substances and alcohol
Miscible body.
4. low-grade uranium ore heavy-fluid enrichment method according to claim 1, it is characterised in that: the time of the heavy-fluid separation
For 5-60min.
5. low-grade uranium ore heavy-fluid enrichment method according to claim 1, it is characterised in that: raw ore passes through in step (1)
It is broken in first being carried out after coarse crushing, then carry out fine crushing.
6. low-grade uranium ore heavy-fluid enrichment method according to claim 1 or 5, it is characterised in that: the coarse smash equipment is
Jaw crusher.
7. low-grade uranium ore heavy-fluid enrichment method according to claim 1 or 5, it is characterised in that: the fine crushing device is
Double-roll crusher.
8. low-grade uranium ore heavy-fluid enrichment method according to claim 5, it is characterised in that: broken equipment is circular cone in described
Crusher.
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| CN111638107A (en) * | 2020-06-09 | 2020-09-08 | 中国科学院西北生态环境资源研究院 | Heavy mineral extraction element |
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| RU2816968C1 (en) * | 2023-12-22 | 2024-04-08 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Method of gravity dressing of uranium-containing ores |
| RU2816958C1 (en) * | 2023-12-22 | 2024-04-08 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Method of gravity dressing of uranium-containing ores |
| RU2816971C1 (en) * | 2023-12-22 | 2024-04-08 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Method of gravity dressing of uranium-containing ores |
| RU2816959C1 (en) * | 2023-12-22 | 2024-04-08 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Method of gravity dressing of uranium-containing ores |
| RU2816972C1 (en) * | 2023-12-22 | 2024-04-08 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Method of gravity dressing of uranium-containing ores |
| RU2816960C1 (en) * | 2023-12-22 | 2024-04-08 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Method of gravity dressing of uranium-containing ores |
| RU2816969C1 (en) * | 2023-12-22 | 2024-04-08 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Method of gravity dressing of uranium-containing ores |
| RU2817243C1 (en) * | 2023-12-22 | 2024-04-11 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Method of gravity dressing of uranium-containing ores |
| RU2817242C1 (en) * | 2023-12-22 | 2024-04-11 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Method of gravity dressing of uranium-containing ores |
| RU2817241C1 (en) * | 2023-12-22 | 2024-04-11 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Волгоградский государственный технический университет" (ВолгГТУ) | Method of gravity dressing of uranium-containing ores |
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