CN109894257B - Comprehensive utilization method for spodumene beneficiation - Google Patents
Comprehensive utilization method for spodumene beneficiation Download PDFInfo
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- CN109894257B CN109894257B CN201910241879.1A CN201910241879A CN109894257B CN 109894257 B CN109894257 B CN 109894257B CN 201910241879 A CN201910241879 A CN 201910241879A CN 109894257 B CN109894257 B CN 109894257B
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Abstract
The invention discloses a comprehensive utilization method for spodumene beneficiation, which adopts a mode that a jaw crusher, a cone crusher and a high-pressure roller mill are combined, and form a local closed-circuit crushing flow with a linear vibrating screen to realize the granularity control of mineral roughing, then the materials subjected to high-pressure roller milling are slurried, classified through the linear vibrating screen, heavy medium beneficiation and magnetic separation, then ore grinding and classification are carried out, a spiral chute and a shaking table are utilized to carry out gravity separation and classification, a cylindrical magnetic separator and a vertical ring pulse strong magnetic separator are sequentially adopted to remove mechanical iron and magnetic minerals, and finally mica, spodumene rough concentrate, spodumene concentrate, tantalum niobium and feldspar are recovered. The method is not limited by production scale, not only is the spodumene mineral efficiently beneficiated, but also other valuable mineral components mica, tantalum niobium and feldspar in the mineral are reasonably recycled, and meanwhile, the tailing discharge amount is small, and high-value comprehensive utilization is achieved.
Description
Technical Field
The invention belongs to the technical field of spodumene beneficiation, and particularly relates to a comprehensive utilization method of spodumene beneficiation.
Background
Spodumene, also known as type 2 spodumene, is one of the main lithium-containing minerals, is used as a main raw material of lithium chemicals, is widely applied to the industries of lithium chemical industry, glass and ceramics, and enjoys the reputation of industrial monosodium glutamate. In recent years, with the rapid development of the lithium battery industry, the demand of lithium element is increasing, and the beneficiation of lithium-containing minerals is receiving more and more attention, wherein the beneficiation of spodumene is the most representative. However, research shows that different experts pay different attention to spodumene ore dressing, some pay attention to flotation reagents, some pay attention to processes, and some pay attention to tailing treatment, but research basically has large locality, and the mineral components in spodumene minerals cannot be comprehensively and efficiently utilized due to the limitation of production scale, so that great waste is generated, and meanwhile, many generated wastes are generated, and high-value comprehensive utilization is difficult to achieve.
Disclosure of Invention
(1) Technical problem to be solved
Aiming at the defects of the prior art, the invention aims to provide a comprehensive utilization method for spodumene beneficiation, which is not limited by production scale, not only carries out high-efficiency beneficiation on spodumene minerals, but also reasonably recycles other valuable mineral components mica, tantalum niobium and feldspar in the minerals, simultaneously ensures that the discharge amount of tailings is small, and achieves high-value comprehensive utilization.
(2) Technical scheme
In order to solve the technical problems, the invention provides a comprehensive utilization method for spodumene beneficiation, which comprises the following specific steps:
step one, crushing-screening; carrying out coarse crushing on spodumene raw ore by a jaw crusher, screening by a No. 1 linear vibrating screen, then carrying out two-stage crushing on the screened oversize product by a cone crusher, and enabling the cone crusher and the No. 1 linear vibrating screen to form a crushing and screening closed flow path so as to thoroughly crush the spodumene raw ore, then feeding the undersize product screened by the No. 1 linear vibrating screen into a roller mill screening closed flow path formed by a high-pressure roller mill and a No. 2 linear vibrating screen, and enabling the undersize product screened by the No. 2 linear vibrating screen to enter the next step;
step two, pulping-grading; adding water into undersize products screened by the No. 2 linear vibrating screen, stirring and pulping, and pumping to a hydraulic classifier, wherein the overflow part of the hydraulic classifier is dehydrated to form a mica crude product, and the underflow part of the hydraulic classifier enters the next step;
screening, heavy medium beneficiation and magnetic separation; feeding the bottom flow part of the hydraulic classifier into a 3# linear vibrating screen, feeding the oversize product screened by the 3# linear vibrating screen into a heavy medium cyclone, and feeding the bottom flow part of the heavy medium cyclone into a vertical ring pulsating high gradient medium magnetic machine for iron removal, wherein a non-magnetic product is spodumene rough concentrate, and a magnetic product and the overflow part of the heavy medium cyclone enter the next step together;
step four, grinding and grading; feeding the magnetic product and the overflow part of the dense medium cyclone into a ball mill for grinding, enabling the ball mill and a 4# linear vibrating screen to form an ore grinding grading closed flow path, and enabling undersize products screened by the 4# linear vibrating screen and undersize products screened by a 3# linear vibrating screen to enter a 1# hydrocyclone for grading;
step five, reselection-classification; the underflow part of the 1# hydrocyclone is reselected through a spiral chute and a shaking table in sequence to obtain tantalum-niobium concentrate, reselected tailings are fed into the 2# hydrocyclone for secondary classification, the bottom part of the 2# hydrocyclone returns to a ball mill, and the overflow part of the 2# hydrocyclone enters the next step;
step six, magnetic separation-desliming; merging the overflow parts of the No. 1 hydrocyclone and the No. 2 hydrocyclone, sequentially feeding the merged overflow parts into a cylindrical magnetic separator and a vertical ring pulsating high-gradient magnetic separator for magnetic separation, enabling a non-magnetic product to enter a No. 3 hydrocyclone for desliming, enabling the overflow part of the No. 3 hydrocyclone and a magnetic product to enter a thickening tank for concentration, carrying out dry discharge treatment on tailings, and enabling the underflow part of the No. 3 hydrocyclone to enter the next step;
step seven, flotation-concentration-dehydration; and (3) carrying out flotation on the underflow part of the No. 3 hydrocyclone, concentrating the concentrate and the tailings obtained by the flotation respectively through a thickening tank, and then carrying out filter pressing by using a filter press to respectively obtain spodumene concentrate and feldspar concentrate.
(3) Advantageous effects
Compared with the traditional spodumene beneficiation method, the technical scheme of the invention has the beneficial effects that:
the technical scheme of the invention starts from the mineral composition and mineral properties of spodumene, and carries out breakthrough optimization on the beneficiation flow and process of the spodumene, so that the spodumene can efficiently recover lithium oxide in the spodumene, and other mineral components in the spodumene can be reasonably recovered and utilized; meanwhile, the flow in the method is reasonably arranged, so that the method generates less waste, is not limited by production scale, and has wide application prospect in the exploitation and utilization of spodumene minerals.
According to the technical scheme, in the step one, the grain size control of mineral roughing is realized in a mode that a jaw crusher, a cone crusher and a high-pressure roller mill are combined and form a local closed-circuit crushing flow with a linear vibrating screen, so that the flow is simple and the treatment capacity is large; in the second step, after the material subjected to high-pressure roller grinding is blended with slurry, a hydraulic classifier is directly adopted to recover mica, so that the purpose of 'being capable of losing early' is realized; in the third step, the recycling of spodumene rough concentrate and mica rough concentrate is respectively realized by grading through a linear vibrating screen, adopting a combination mode of heavy medium ore dressing-vertical ring pulsating medium magnetic machine for coarse products on the screen and combining the heavy medium ore dressing with the magnetic separation iron removal and the hydraulic classifier of the vertical ring pulsating medium magnetic machine, the spodumene rough concentrate is collected in advance, the early yield of the spodumene is realized, the treatment capacity of the later process is reduced, and the ore dressing cost is greatly saved; in the fourth step, after grinding, carrying out graded desliming by adopting a hydrocyclone, carrying out rough concentration by adopting a spiral chute and carrying out fine concentration by adopting a table concentrator to obtain tantalum-niobium concentrate; in the fifth step, the sixth step and the seventh step, tantalum and niobium are recovered by combining a spiral chute and a shaking table, desliming is performed before flotation, a cylindrical magnetic separator and a vertical-ring pulsating strong magnetic separator are sequentially adopted to remove mechanical iron and magnetic minerals, so that a good working environment is created for flotation, the consumption of flotation reagents is reduced, the influence of the reagents in ore pulp and the pH value is avoided when the magnetic separator works, meanwhile, the recovery of lithium oxide in spodumene and the content of iron oxide in feldspar are realized by using a weak magnetic-strong magnetic-flotation process, the purpose of recovering mica, spodumene rough concentrate, spodumene concentrate, tantalum and niobium feldspar is finally realized, tailings after flotation are concentrated and dehydrated are directly used as feldspar products, and the comprehensive utilization of resources is realized.
In addition, the invention is not limited by production scale, not only carries out high-efficiency ore dressing on spodumene minerals, but also carries out reasonable recycling on mica, tantalum niobium and feldspar which are other valuable mineral components in the minerals, simultaneously leads the discharge amount of tailings to be small and achieves high-value comprehensive utilization.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood and obvious, the technical solutions in the embodiments of the present invention are clearly and completely described below to further illustrate the invention, and obviously, the described embodiments are only a part of the embodiments of the present invention, but not all the embodiments.
The specific embodiment is a comprehensive utilization method for spodumene beneficiation, which comprises the following specific steps:
1. crushing-screening: crushing spodumene raw ore to be less than 80mm by a jaw crusher, screening by using a No. 1 linear vibrating screen (the screen hole is 30mm), then, carrying out secondary crushing on the screened oversize product by using a cone crusher, forming a crushing and screening closed flow by using the cone crusher and the linear vibrating screen, feeding the undersize product into a roller grinding-screening closed flow formed by a high-pressure roller grinder and a No. 2 linear vibrating screen (the screen hole is 3.5mm), and feeding the undersize product into the next flow;
2. pulping-grading: adding water into the undersize product, stirring and pulping, pumping to a hydraulic classifier, dehydrating the overflow part of the hydraulic classifier by a vibrating screen to obtain a mica crude product, and feeding the underflow into the next process;
3. screening, heavy medium beneficiation-magnetic separation: feeding the bottom flow of a hydraulic classifier into a 3# linear vibrating screen (the screen hole is 0.5mm), feeding products on the screen into a heavy medium cyclone (heavy medium adopts ferrosilicon) for heavy medium mineral separation, feeding the bottom flow of the heavy medium cyclone into a vertical ring pulsating high-gradient medium magnetic machine for iron removal, wherein non-magnetic products are spodumene rough concentrates, and feeding magnetic products and overflow of the heavy medium cyclone into the next flow;
4. grinding and grading: feeding the magnetic product and overflow of the dense medium cyclone into a ball mill for grinding, forming a grinding-grading closed flow path by the ball mill and a No. 4 linear vibrating screen (screen holes are 0.5mm), and grading the undersize product and the undersize product of the No. 3 linear vibrating screen into a No. 1 hydrocyclone;
5. reselection-classification: the underflow of the No. 1 hydrocyclone is reselected through a spiral chute and a table concentrator in sequence to obtain tantalum-niobium concentrate; reselecting tailings and feeding the tailings into a No. 2 hydrocyclone for reclassification, returning the underflow of the No. 2 hydrocyclone to a ball mill, and overflowing the underflow into the next process;
6. magnetic separation-desliming; combining the overflows of the No. 1 hydrocyclone and the No. 2 hydrocyclone, sequentially feeding the combined overflows into a semi-countercurrent cylindrical magnetic separator (the magnetic field is 3000Gs) and a vertical ring pulsating high-gradient magnetic separator (the background field intensity is 1.3T) to perform magnetic separation operation, allowing a non-magnetic product to enter a No. 3 hydrocyclone for desliming, allowing the overflow (namely a mud-containing part) of the No. 3 hydrocyclone and a magnetic product to enter a thickening tank together, and performing tailing dry discharge treatment after concentration; the underflow of the No. 3 hydrocyclone enters the next process;
7. flotation-concentration-dehydration: and (3) carrying out flotation on the bottom flow of the 3# hydrocyclone, concentrating the flotation concentrate and tailings respectively through a thickening tank, and carrying out filter pressing through a filter press to obtain spodumene concentrate and feldspar concentrate respectively.
The method is used for researching a spodumene ore, and the contents and the purposes of the main components of the obtained product are as follows:
having thus described the principal technical features and basic principles of the invention, and the advantages associated therewith, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description is described in terms of various embodiments, not every embodiment includes only a single embodiment, and such descriptions are provided for clarity only, and those skilled in the art will recognize that the embodiments described herein can be combined as a whole to form other embodiments as would be understood by those skilled in the art.
Claims (1)
1. A comprehensive utilization method for spodumene beneficiation is characterized by comprising the following specific steps:
step one, crushing-screening; carrying out coarse crushing on spodumene raw ore by a jaw crusher, screening by a No. 1 linear vibrating screen, then carrying out two-stage crushing on the screened oversize product by a cone crusher, and enabling the cone crusher and the No. 1 linear vibrating screen to form a crushing and screening closed flow path so as to thoroughly crush the spodumene raw ore, then feeding the undersize product screened by the No. 1 linear vibrating screen into a roller mill screening closed flow path formed by a high-pressure roller mill and a No. 2 linear vibrating screen, and enabling the undersize product screened by the No. 2 linear vibrating screen to enter the next step;
step two, pulping-grading; adding water into undersize products screened by the No. 2 linear vibrating screen, stirring and pulping, and pumping to a hydraulic classifier, wherein the overflow part of the hydraulic classifier is dehydrated to form a mica crude product, and the underflow part of the hydraulic classifier enters the next step;
screening, heavy medium beneficiation and magnetic separation; feeding the bottom flow part of the hydraulic classifier into a 3# linear vibrating screen, feeding the oversize product screened by the 3# linear vibrating screen into a heavy medium cyclone, and feeding the bottom flow part of the heavy medium cyclone into a vertical ring pulsating high gradient medium magnetic machine for iron removal, wherein a non-magnetic product is spodumene rough concentrate, and a magnetic product and the overflow part of the heavy medium cyclone enter the next step together;
step four, grinding and grading; feeding the magnetic product and the overflow part of the dense medium cyclone into a ball mill for grinding, enabling the ball mill and a 4# linear vibrating screen to form an ore grinding grading closed flow path, and enabling undersize products screened by the 4# linear vibrating screen and undersize products screened by a 3# linear vibrating screen to enter a 1# hydrocyclone for grading;
step five, reselection-classification; the underflow part of the 1# hydrocyclone is reselected through a spiral chute and a shaking table in sequence to obtain tantalum-niobium concentrate, reselected tailings are fed into the 2# hydrocyclone for secondary classification, the bottom part of the 2# hydrocyclone returns to a ball mill, and the overflow part of the 2# hydrocyclone enters the next step;
step six, magnetic separation-desliming; merging the overflow parts of the No. 1 hydrocyclone and the No. 2 hydrocyclone, sequentially feeding the merged overflow parts into a cylindrical magnetic separator and a vertical ring pulsating high-gradient magnetic separator for magnetic separation, enabling a non-magnetic product to enter a No. 3 hydrocyclone for desliming, enabling the overflow part of the No. 3 hydrocyclone and a magnetic product to enter a thickening tank for concentration, carrying out dry discharge treatment on tailings, and enabling the underflow part of the No. 3 hydrocyclone to enter the next step;
step seven, flotation-concentration-dehydration; and (3) carrying out flotation on the underflow part of the No. 3 hydrocyclone, concentrating the concentrate and the tailings obtained by the flotation respectively through a thickening tank, and then carrying out filter pressing by using a filter press to respectively obtain spodumene concentrate and feldspar concentrate.
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| CN110575904A (en) * | 2019-09-23 | 2019-12-17 | 昆明理工大学 | A kind of spodumene classifying double medium-flotation beneficiation method |
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| CN117680274B (en) * | 2023-11-06 | 2024-12-06 | 中国地质科学院矿产综合利用研究所 | A method for efficiently enriching lithium from spodumene ore |
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Address after: 341008 Shahe Industrial Park, Zhanggong District, Ganzhou City, Jiangxi Province Patentee after: Ganzhou Jinhuan magnetic separation technology and Equipment Co.,Ltd. Address before: 341008 Shahe Industrial Park, Zhanggong District, Ganzhou City, Jiangxi Province Patentee before: SLON MAGNETIC SEPARATOR Ltd. |