CN109127468B - Photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores - Google Patents
Photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/342—Sorting according to other particular properties according to optical properties, e.g. colour
- B07C5/3425—Sorting according to other particular properties according to optical properties, e.g. colour of granular material, e.g. ore particles, grain
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
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Abstract
The invention discloses a photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores, which comprises the following steps: the crude ore is screened into two size fractions after coarse crushing and intermediate crushing: 5-10mm and 2-5 mm; performing first-stage color separation on 5-10mm ores to obtain first-stage white ores and first-stage black ores, and performing second-stage color separation on the first-stage black ores to obtain second-stage white ores and second-stage black ores, wherein the first-stage white ores and the second-stage white ores are tailings, and the second-stage black ores are uranium concentrates; performing first-stage color separation on 2-5mm ores to obtain first-stage white ores and first-stage black ores, performing second-stage color separation on the first-stage black ores to obtain second-stage white ores and second-stage black ores, wherein the first-stage white ores and the second-stage white ores are tailings, and the second-stage black ores are uranium concentrates. The invention adopts grading selection, and the narrow-grade selection can effectively improve the recovery rate of each grade; photoelectric color sorting is a process for sorting ores according to differences of optical characteristics of the ores.
Description
Technical Field
The invention belongs to the technical field of uranium ore dressing, and particularly relates to a photoelectric sorting and tailing discarding dressing method for low-grade uranium ores.
Background
Uranium resources are important strategic resources and energy minerals in China and are basic raw materials for the development of the nuclear industry in China. China is a country with less abundant uranium ore resources, and has found that the resources are mainly distributed in 23 provinces, cities and autonomous regions in China, ore deposit types mainly comprise 4 kinds of uranium ore deposits of granite type, volcanic rock type, sandstone type and carbo-silicalite type, and the mineralizing geological conditions are complex. The uranium ore deposit in China is medium and small (accounting for 91.7%), the ore grade is mainly medium and low grade, the average grade of the ore deposit is lower than 0.3%, accounting for 96.7%, the ore deposit is not uniformly mineralized, the grade change coefficient is large, the grades are distributed in a jumping manner, the content of waste rocks is large, a considerable part of the uranium ore deposit contains various associated elements and components, the hydrometallurgy is not favorable, the ore dressing pre-enrichment is necessary, and the uranium final product can be obtained only by leaching and extracting.
At present, the beneficiation methods for treating low-grade uranium ores mainly comprise radioactive separation, gravity separation and magnetic separation and flotation. The upper limit of the granularity of the ore subjected to radioactive sorting treatment is 250-300mm, and the lower limit is 20-30mm, and the radioactive sorting treatment aims at a single uranium ore with a simpler symbiotic relationship. Besides uranium, low-grade uranium-bearing polymetallic ore in China is often associated with gold, silver, bismuth, cadmium, barium strontium, rare earth and the like, the useful minerals are difficult to comprehensively recover through radioactive separation, and the separation precision is not high due to the adoption of conventional gravity separation and magnetic separation methods for discarding and preconcentration, so that the purpose of discarding tailings is difficult to achieve. Flotation processes are used primarily for the treatment of fines sorting and often require the use of a coarse tailings removal process in conjunction with the flotation process. Therefore, the low-grade uranium ore coarse grain tailing discarding ore dressing technology with simple process and high sorting precision is the problem to be solved.
The color selector is equipment for automatically sorting out heterochromatic particles in particle materials by utilizing a photoelectric detection technology according to the difference of optical characteristics of the materials. The color selector mainly comprises a feeding system, an optical detection system, a signal processing system and a separation execution system. The method has the advantages of high reliability, high sorting precision, large processing capacity and the like.
Disclosure of Invention
Based on the problems in the prior art, the invention aims to provide a photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores.
The object of the invention is achieved in the following way:
a photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores comprises the following steps:
(1) the raw ore is subjected to primary screening after coarse crushing and intermediate crushing, the ore with the granularity larger than 10mm returns to the coarse crushing, and the ore is divided into two size fractions by the primary screening: 5-10mm and 2-5mm, performing photoelectric color separation on the ores of the two size fractions respectively, and treating the ores smaller than 2mm as tailings;
(2) performing first-stage color separation on 5-10mm ores to obtain first-stage white ores and first-stage black ores, and performing second-stage color separation on the first-stage black ores to obtain second-stage white ores and second-stage black ores, wherein the first-stage white ores and the second-stage white ores are tailings, and the second-stage black ores are uranium concentrates; performing first-stage color separation on 2-5mm ores to obtain first-stage white ores and first-stage black ores, performing second-stage color separation on the first-stage black ores to obtain second-stage white ores and second-stage black ores, wherein the first-stage white ores and the second-stage white ores are tailings, and the second-stage black ores are uranium concentrates.
The first-stage color selection in the step (2) is specifically as follows: feeding ore with the particle size of 5-10mm or 2-5mm into a photoelectric color selector, and separating the ore by the photoelectric color selector according to the intensity difference of reflected light or transmitted light of different ores to obtain a section of white ore and a section of black ore.
The sensitivity of the photoelectric color selector during one-stage color selection is 30-70, and the number of dots is 8-19%.
The second-stage color selection in the step (2) is specifically as follows: and feeding the obtained first-stage black ore into a photoelectric color selector, and separating the minerals by the photoelectric color selector according to the intensity difference of reflected light or transmitted light of different minerals to obtain a second-stage white ore and a second-stage black ore.
The light sensitivity of the photoelectric color selector during the second-stage color selection is 60-85%, and the number of dots is 10-18%.
The first section of screening equipment is a vibrating screen.
The coarse crushing equipment is a jaw crusher.
The middle crushing equipment is a cone crusher.
Compared with the prior art, the method adopts grading selection, and the narrow-size selection can effectively improve the recovery rate of each size; photoelectric color sorting is a process for sorting ores according to differences of optical characteristics of the ores. The ore tailing discarding machine has the advantages of high reliability, simplicity in operation, high sorting precision, large processing capacity and the like, and can effectively discard the tailings of ores.
Drawings
FIG. 1 is a flow chart of an electro-optical color sorting test.
Detailed Description
The present invention is described in detail below with reference to specific embodiments for better understanding of technical solutions of the present invention, and the description of the present invention is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
The manufacturer of the photoelectric color selector used in the invention is Anhui fast photoelectric technology company Limited.
The color selector is equipment for automatically sorting out heterochromatic particles in particle materials by utilizing a photoelectric detection technology according to the difference of optical characteristics of the materials.
The coarse crushing equipment is a jaw crusher, and the granularity after coarse crushing is generally 10-30 mm; the medium crushing equipment is generally a cone crusher, and the medium crushing granularity is generally 5-15 mm; one section of screening equipment is a vibrating screen and is provided with 3 layers of screens, the sizes of the screens are respectively 10mm, 5mm and 2mm, ores with the granularity smaller than 10mm size fraction enter photoelectric color separation, and ores with the granularity larger than 10mm size fraction return to a crusher for crushing.
Example 1:
a photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores comprises the following steps:
(1) the raw ore is subjected to primary screening after coarse crushing and intermediate crushing, the ore with the granularity larger than 10mm returns to the coarse crushing, and the ore is divided into two size fractions by the primary screening: 5-10mm and 2-5mm, performing photoelectric color separation on the ores of the two size fractions respectively, and treating the ores smaller than 2mm as tailings;
(2) feeding 5-10mm ore into a photoelectric color selector, separating the ore according to the intensity difference of reflected light or transmitted light of different ores by the photoelectric color selector, separating the ores according to the intensity difference of the reflected light or transmitted light of different ores by the photoelectric color selector when carrying out first-stage color selection by the photoelectric color selector, wherein the light sensitivity of the photoelectric color selector is 30-70, the number of points is 8-19%, so that a first-stage white ore and a first-stage black ore are obtained, feeding the first-stage black ore into the photoelectric color selector, separating the ores according to the intensity difference of the reflected light or transmitted light of different ores by the photoelectric color selector, carrying out second-stage color selection by the photoelectric color selector with the light sensitivity of 60-85, and the number of points is 10-18%, so that a second-stage white ore and a second-stage; 2-5mm ore is fed into a photoelectric color selector, the photoelectric color selector separates the ore according to the intensity difference of reflected light or transmitted light of different ore, the light sensitivity of the photoelectric color selector during first-stage color selection is 30-70, the number of points is 8-19%, a first-stage white ore and a first-stage black ore are obtained, the first-stage black ore is fed into the photoelectric color selector, the photoelectric color selector separates the ore according to the intensity difference of the reflected light or transmitted light of different ore, the light sensitivity of the photoelectric color selector during second-stage color selection is 60-85, the number of points is 10-18%, a second-stage white ore and a second-stage black ore are obtained, the first-stage white ore and the second-stage white ore are tailings, and the second-stage black ore is uranium concentrate.
Example 2:
a photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores comprises the following steps:
(1) the raw ore is subjected to primary screening after coarse crushing and intermediate crushing, the ore with the granularity larger than 10mm returns to the coarse crushing, and the ore is divided into two size fractions by the primary screening: 5-10mm and 2-5mm, performing photoelectric color separation on the ores of the two size fractions respectively, and treating the ores smaller than 2mm as tailings;
(2) feeding 5-10mm ore into a photoelectric color selector, separating the ore according to the intensity difference of reflected light or transmitted light of different ores by the photoelectric color selector, wherein the light sensitivity of the photoelectric color selector during first-stage color selection is 30, the number of points is 8%, so that first-stage white ore and first-stage black ore are obtained, feeding the first-stage black ore into the photoelectric color selector, separating the ores by the photoelectric color selector according to the intensity difference of the reflected light or transmitted light of the different ores, the light sensitivity of the photoelectric color selector during second-stage color selection is 60, the number of points is 10%, so that second-stage white ore and second-stage black ore are obtained, both the first-stage white ore and the second-stage white ore are tailings, and the second-stage black ore is uranium concentrate; 2-5mm ore is fed into a photoelectric color selector, the photoelectric color selector separates the ore according to the intensity difference of reflected light or transmitted light of different ore, the light sensitivity of the photoelectric color selector during first-stage color selection is 30, the number of points is 8%, a first-stage white ore and a first-stage black ore are obtained, the first-stage black ore is fed into the photoelectric color selector, the photoelectric color selector separates the ore according to the intensity difference of the reflected light or transmitted light of different ore, the light sensitivity of the photoelectric color selector during second-stage color selection is 60, the number of points is 10%, a second-stage white ore and a second-stage black ore are obtained, the first-stage white ore and the second-stage white ore are tailings, and the second-stage black ore is uranium concentrate.
Example 3:
a photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores comprises the following steps:
(1) the raw ore is subjected to primary screening after coarse crushing and intermediate crushing, the ore with the granularity larger than 10mm returns to the coarse crushing, and the ore is divided into two size fractions by the primary screening: 5-10mm and 2-5mm, performing photoelectric color separation on the ores of the two size fractions respectively, and treating the ores smaller than 2mm as tailings;
(2) feeding 5-10mm ore into a photoelectric color selector, separating the ore according to the intensity difference of reflected light or transmitted light of different ores by the photoelectric color selector, wherein the light sensitivity of the photoelectric color selector during first-stage color selection is 35, the number of points is 10%, so that a first-stage white ore and a first-stage black ore are obtained, feeding the first-stage black ore into the photoelectric color selector, separating the ores by the photoelectric color selector according to the intensity difference of the reflected light or transmitted light of the different ores, the light sensitivity of the photoelectric color selector during second-stage color selection is 65, the number of points is 12%, so that a second-stage white ore and a second-stage black ore are obtained, wherein the first-stage white ore and the second-stage white ore are tailings, and the second-stage black ore is uranium concentrate; 2-5mm ore is fed into a photoelectric color selector, the photoelectric color selector separates the ore according to the intensity difference of reflected light or transmitted light of different ore, the light sensitivity of the photoelectric color selector during first-stage color selection is 35, the number of points is 10% to obtain first-stage white ore and first-stage black ore, the first-stage black ore is fed into the photoelectric color selector, the photoelectric color selector separates the ore according to the intensity difference of the reflected light or transmitted light of different ore, the light sensitivity of the photoelectric color selector during second-stage color selection is 65%, the number of points is 12% to obtain second-stage white ore and second-stage black ore, the first-stage white ore and the second-stage white ore are tailings, and the second-stage black ore is uranium concentrate.
Example 4:
a photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores comprises the following steps:
(1) the raw ore is subjected to primary screening after coarse crushing and intermediate crushing, the ore with the granularity larger than 10mm returns to the coarse crushing, and the ore is divided into two size fractions by the primary screening: 5-10mm and 2-5mm, performing photoelectric color separation on the ores of the two size fractions respectively, and treating the ores smaller than 2mm as tailings;
(2) feeding 5-10mm ore into a photoelectric color selector, separating the ore according to the intensity difference of reflected light or transmitted light of different ores by the photoelectric color selector, separating the ores according to the intensity difference of the reflected light or transmitted light of different ores by the photoelectric color selector when carrying out first-stage color selection by the photoelectric color selector, wherein the light sensitivity is 40, the dotting number is 12 percent, so that first-stage white ore and first-stage black ore are obtained, feeding the first-stage black ore into the photoelectric color selector, separating the ores by the photoelectric color selector according to the intensity difference of the reflected light or transmitted light of different ores, the light sensitivity of the photoelectric color selector when carrying out second-stage color selection is 70 percent, and the dotting number is 14 percent, so that second-stage white ore and second-stage black ore are obtained, wherein the; 2-5mm ore is fed into a photoelectric color selector, the photoelectric color selector separates the ore according to the intensity difference of reflected light or transmitted light of different ore, the light sensitivity of the photoelectric color selector during first-stage color selection is 40, the point number is 12%, a first-stage white ore and a first-stage black ore are obtained, the first-stage black ore is fed into the photoelectric color selector, the photoelectric color selector separates the ore according to the intensity difference of the reflected light or transmitted light of different ore, the light sensitivity of the photoelectric color selector during second-stage color selection is 70, the point number is 14%, a second-stage white ore and a second-stage black ore are obtained, the first-stage white ore and the second-stage white ore are tailings, and the second-stage black ore is uranium concentrate.
Example 5:
a photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores comprises the following steps:
(1) the raw ore is subjected to primary screening after coarse crushing and intermediate crushing, the ore with the granularity larger than 10mm returns to the coarse crushing, and the ore is divided into two size fractions by the primary screening: 5-10mm and 2-5mm, performing photoelectric color separation on the ores of the two size fractions respectively, and treating the ores smaller than 2mm as tailings;
(2) feeding 5-10mm ore into a photoelectric color selector, separating the ore according to the intensity difference of reflected light or transmitted light of different ores by the photoelectric color selector, wherein the light sensitivity of the photoelectric color selector during first-stage color selection is 50, the number of points is 15%, so that first-stage white ore and first-stage black ore are obtained, feeding the first-stage black ore into the photoelectric color selector, separating the ores by the photoelectric color selector according to the intensity difference of the reflected light or transmitted light of the different ores, the light sensitivity of the photoelectric color selector during second-stage color selection is 75, the number of points is 15%, so that second-stage white ore and second-stage black ore are obtained, both the first-stage white ore and the second-stage white ore are tailings, and the second-stage black ore is uranium concentrate; 2-5mm ore is fed into a photoelectric color selector, the photoelectric color selector separates the ore according to the intensity difference of reflected light or transmitted light of different ore, the light sensitivity of the photoelectric color selector during first-stage color selection is 50, the number of points is 15%, a first-stage white ore and a first-stage black ore are obtained, the first-stage black ore is fed into the photoelectric color selector, the photoelectric color selector separates the ore according to the intensity difference of the reflected light or transmitted light of different ore, the light sensitivity of the photoelectric color selector during second-stage color selection is 75, the number of points is 15%, a second-stage white ore and a second-stage black ore are obtained, the first-stage white ore and the second-stage white ore are tailings, and the second-stage black ore is uranium concentrate.
Example 6:
a photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores comprises the following steps:
(1) the raw ore is subjected to primary screening after coarse crushing and intermediate crushing, the ore with the granularity larger than 10mm returns to the coarse crushing, and the ore is divided into two size fractions by the primary screening: 5-10mm and 2-5mm, performing photoelectric color separation on the ores of the two size fractions respectively, and treating the ores smaller than 2mm as tailings;
(2) feeding 5-10mm ore into a photoelectric color selector, separating the ore according to the intensity difference of reflected light or transmitted light of different ores by the photoelectric color selector, wherein the light sensitivity of the photoelectric color selector during first-stage color selection is 60, the number of points is 17% to obtain first-stage white ore and first-stage black ore, feeding the first-stage black ore into the photoelectric color selector, separating the ores by the photoelectric color selector according to the intensity difference of the reflected light or transmitted light of the different ores, the light sensitivity of the photoelectric color selector during second-stage color selection is 80%, the number of points is 16% to obtain second-stage white ore and second-stage black ore, wherein the first-stage white ore and the second-stage white ore are tailings, and the second-stage black ore is uranium concentrate; 2-5mm ore is fed into a photoelectric color selector, the photoelectric color selector separates the ore according to the intensity difference of reflected light or transmitted light of different ore, the light sensitivity of the photoelectric color selector during first-stage color selection is 60, the number of points is 17% to obtain first-stage white ore and first-stage black ore, the first-stage black ore is fed into the photoelectric color selector, the photoelectric color selector separates the ore according to the intensity difference of the reflected light or transmitted light of different ore, the light sensitivity of the photoelectric color selector during second-stage color selection is 80%, the number of points is 16% to obtain second-stage white ore and second-stage black ore, the first-stage white ore and the second-stage white ore are tailings, and the second-stage black ore is uranium concentrate.
Example 7:
a photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores comprises the following steps:
(1) the raw ore is subjected to primary screening after coarse crushing and intermediate crushing, the ore with the granularity larger than 10mm returns to the coarse crushing, and the ore is divided into two size fractions by the primary screening: 5-10mm and 2-5mm, performing photoelectric color separation on the ores of the two size fractions respectively, and treating the ores smaller than 2mm as tailings;
(2) feeding 5-10mm ore into a photoelectric color selector, separating the ore according to the intensity difference of reflected light or transmitted light of different ores by the photoelectric color selector, wherein the light sensitivity of the photoelectric color selector during first-stage color selection is 70, the number of points is 19%, so that first-stage white ore and first-stage black ore are obtained, feeding the first-stage black ore into the photoelectric color selector, separating the ores by the photoelectric color selector according to the intensity difference of the reflected light or transmitted light of the different ores, the light sensitivity of the photoelectric color selector during second-stage color selection is 85, the number of points is 18%, so that second-stage white ore and second-stage black ore are obtained, both the first-stage white ore and the second-stage white ore are tailings, and the second-stage black ore is uranium concentrate; 2-5mm ore is fed into a photoelectric color selector, the photoelectric color selector separates the ore according to the intensity difference of reflected light or transmitted light of different ore, the light sensitivity of the photoelectric color selector during first-stage color selection is 70, the number of points is 19%, a first-stage white ore and a first-stage black ore are obtained, the first-stage black ore is fed into the photoelectric color selector, the photoelectric color selector separates the ore according to the intensity difference of the reflected light or transmitted light of different ore, the light sensitivity of the photoelectric color selector during second-stage color selection is 85, the number of points is 18%, a second-stage white ore and a second-stage black ore are obtained, the first-stage white ore and the second-stage white ore are tailings, and the second-stage black ore is uranium concentrate.
Example 8:
the embodiment provides a photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores, which specifically comprises the following steps:
the composition of a deposit of certain uranium-niobium-lead ores is shown in Table 1.
Crushing the sample to be less than 10mm by using a jaw crusher, screening the sample into two size fractions of 5-10mm and 2-5mm by using a vibrating screen, and then performing two-section photoelectric color separation respectively, wherein the ore less than 2mm is treated as tailings.
Feeding ores with the granularity of 5-10mm or 2-5mm into a photoelectric color selector, and separating the ores by the photoelectric color selector according to the intensity difference of reflected light or transmitted light of different ores to obtain a section of white ore and a section of black ore; the sensitivity of the photoelectric color selector in one-stage color selection is 50, and the number of dots is 10%.
Feeding the obtained first-stage black ore into a photoelectric color selector, and separating the minerals by the photoelectric color selector according to the intensity difference of reflected light or transmitted light of different minerals to obtain a second-stage white ore and a second-stage black ore; the light sensitivity of the photoelectric color selector in the second-stage color selection is 80, and the number of dots is 10%.
The experimental flow chart is shown in figure 1, and the experimental results are shown in tables 2-3.
Test results show that by adopting the coarse grain tailing discarding beneficiation method for the low-grade uranium ores, uranium, niobium and lead can be mainly enriched in black ores, about 30-40% of white ores can be discarded, the purposes of enrichment and tailing discarding of the low-grade uranium ores are achieved, and the method has the characteristics of simple process, low cost, high sorting precision, high recovery rate and the like, and achieves the purpose of discarding part of qualified tailings in advance under the condition of coarse granularity.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (8)
1. A photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores is characterized by comprising the following steps: the method comprises the following steps:
(1) the raw ore is subjected to primary screening after coarse crushing and intermediate crushing, the ore with the granularity larger than 10mm returns to the coarse crushing, and the ore is divided into two size fractions by the primary screening: 5-10mm and 2-5mm, performing photoelectric color separation on the ores of the two size fractions respectively, and treating the ores smaller than 2mm as tailings;
(2) performing first-stage color separation on 5-10mm ores to obtain first-stage white ores and first-stage black ores, and performing second-stage color separation on the first-stage black ores to obtain second-stage white ores and second-stage black ores, wherein the first-stage white ores and the second-stage white ores are tailings, and the second-stage black ores are uranium concentrates; performing first-stage color separation on 2-5mm ores to obtain first-stage white ores and first-stage black ores, performing second-stage color separation on the first-stage black ores to obtain second-stage white ores and second-stage black ores, wherein the first-stage white ores and the second-stage white ores are tailings, and the second-stage black ores are uranium concentrates.
2. The photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores according to claim 1, characterized in that: the first-stage color selection in the step (2) is specifically as follows: feeding ore with the particle size of 5-10mm or 2-5mm into a photoelectric color selector, and separating the ore by the photoelectric color selector according to the intensity difference of reflected light or transmitted light of different ores to obtain a section of white ore and a section of black ore.
3. The photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores according to claim 2, characterized in that: the sensitivity of the photoelectric color selector during one-stage color selection is 30-70, and the number of dots is 8-19%.
4. The photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores according to claim 1, characterized in that: the second-stage color selection in the step (2) is specifically as follows: and feeding the obtained first-stage black ore into a photoelectric color selector, and separating the minerals by the photoelectric color selector according to the intensity difference of reflected light or transmitted light of different minerals to obtain a second-stage white ore and a second-stage black ore.
5. The photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores according to claim 4, characterized in that: the light sensitivity of the photoelectric color selector during the second-stage color selection is 60-85%, and the number of dots is 10-18%.
6. The photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores according to claim 1, characterized in that: the first section of screening equipment is a vibrating screen.
7. The photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores according to claim 1, characterized in that: the coarse crushing equipment is a jaw crusher.
8. The photoelectric sorting and tailing discarding beneficiation method for low-grade uranium ores according to claim 1, characterized in that: the middle crushing equipment is a cone crusher.
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| CN113042198B (en) * | 2021-04-25 | 2022-07-26 | 王裕先 | Method for extracting low enriched uranium from depleted uranium mineral resources |
| CN113385291B (en) * | 2021-05-27 | 2023-03-14 | 中国地质科学院郑州矿产综合利用研究所 | Method for recovering qualified refractory material raw material from high-iron bauxite clinker waste |
| CN114247552B (en) * | 2021-12-03 | 2023-07-21 | 内蒙古科技大学 | Beneficiation process for coal gangue by utilizing chromaticity difference |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102189083A (en) * | 2011-03-31 | 2011-09-21 | 沈阳东北大学冶金技术研究所有限公司 | Method for pre-sorting low-grade tin ores through X-ray radiation |
| CN104258980A (en) * | 2014-09-15 | 2015-01-07 | 中冶北方（大连）工程技术有限公司 | Uranium-bearing paigeite separating process |
| CN106994447A (en) * | 2017-06-02 | 2017-08-01 | 南华大学 | A kind of equipment that sorting is integrated for radioactive uranium ore concentrate, lean ore and barren rock |
| CN107029872A (en) * | 2017-06-21 | 2017-08-11 | 北京矿冶研究总院 | Coarse grain tailing discarding beneficiation method for low-grade uranium-containing rare earth polymetallic ore |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4365719A (en) * | 1981-07-06 | 1982-12-28 | Leonard Kelly | Radiometric ore sorting method and apparatus |
-
2018
- 2018-07-11 CN CN201810754655.6A patent/CN109127468B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102189083A (en) * | 2011-03-31 | 2011-09-21 | 沈阳东北大学冶金技术研究所有限公司 | Method for pre-sorting low-grade tin ores through X-ray radiation |
| CN104258980A (en) * | 2014-09-15 | 2015-01-07 | 中冶北方（大连）工程技术有限公司 | Uranium-bearing paigeite separating process |
| CN106994447A (en) * | 2017-06-02 | 2017-08-01 | 南华大学 | A kind of equipment that sorting is integrated for radioactive uranium ore concentrate, lean ore and barren rock |
| CN107029872A (en) * | 2017-06-21 | 2017-08-11 | 北京矿冶研究总院 | Coarse grain tailing discarding beneficiation method for low-grade uranium-containing rare earth polymetallic ore |
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