CN204550689U - The tripping device of useful component in a kind of bauxite - Google Patents
The tripping device of useful component in a kind of bauxite Download PDFInfo
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- CN204550689U CN204550689U CN201520045439.6U CN201520045439U CN204550689U CN 204550689 U CN204550689 U CN 204550689U CN 201520045439 U CN201520045439 U CN 201520045439U CN 204550689 U CN204550689 U CN 204550689U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The utility model discloses the tripping device of useful component in a kind of bauxite, comprise aluminium sodium extraction unit, silicon extraction unit, rare earth extraction unit and the flocculation agent extraction unit implemented step by step.Wherein aluminium sodium extraction unit comprises suction culvert, aluminium sodium solution sets gradually after extracting pipeline, aluminium vanadine e Foerderanlage, activator e Foerderanlage, blending device and blending device sintering oven, water logging groove and grade one filter; The utility model to greatest extent in optimize the production line of alumyte synthesized utilization, make that water obtains circulation, acid utilized, and connect with existing alumina producing flow process as far as possible, achieve the automatization of industry, save human cost, reduce the impact of environment on operator.
Description
Technical field
The utility model belongs to mining and metallurgical technology field, relates to the tripping device step by step of useful component in a kind of bauxite.
Background technology
In recent years, fast development and the domestic aluminum oxide output of adjoint China aluminum i ndustry increase substantially, and result in the sharply increase to bauxite (also known as bauxitic clay) demand.And the current bauxite of China really can be exploited and have the reserves of certain competitive power less than 200,000,000 tons, and the A/S of domestic bauxite more than 80% is 5-8, even less middle-low bauxite, existing alumina producer great majority can only utilize alumina silica ratio to be greater than the bauxite of more than 7 grades.And the bauxite that China's alumina silica ratio is greater than 7 only accounts for about 30% of total reserves, and based on diaspore type bauxite, its stripping property difference causes production cost high.In addition, current alumina producing technology also can discharge the waste of enormous amount---and red mud and discarded low-grade bauxite, cause resource serious waste and environmental pollution.
In recent years, also there is the method for comprehensive utilization of multiple low grade bauxite in scientific research field, comprising by after bauxite again by the scheme of component step by step arithmetic, high-temperature calcination is carried out by adding activating component in bauxite, add acid again after being separated by Silicified breccias and carry out step by step arithmetic, but these are only limitted to the method for lab design, lack the device in industrial applications, realize large-scale automatic industrial and produce.
Utility model content
The utility model discloses a kind of tripping device for useful component in bauxite, no matter low-grade or higher-grade bauxite, all can to the step by step arithmetic of aluminium wherein, sodium, iron and rare earth metal, what substantially can realize bauxite eats dry bleeding, and have realization of industrialization simple, be convenient to features such as associating with existing production unit, industrialization automatization is strong.
The technical solution of the utility model is as follows:
The tripping device of useful component in a kind of bauxite, comprise aluminium sodium extraction unit, sintering oven, water logging groove and grade one filter that described aluminium sodium extraction unit sets gradually after comprising suction culvert, the extraction of aluminium sodium solution pipeline, aluminium vanadine e Foerderanlage, activator e Foerderanlage, blending device and blending device; Water is injected water logging groove by suction culvert, and liquid outlet and the aluminum solutions of grade one filter extract pipeline and be connected; The bauxitic clay feed particles of aluminium vanadine e Foerderanlage conveying and the activator granulate of activator e Foerderanlage conveying in blending device in proportion after Homogeneous phase mixing, then are placed in sintering oven and sinter; Sintered product is after the water logging of water logging groove, then after grade one filter filters, one-level filtrate enters aluminium sodium solution and extracts pipeline, and one-level filter residue then enters next step and extracts link; The activator that pipeline production terminal of extracting aluminium sodium solution reclaims enters activator e Foerderanlage again, realizes recycling of activator.
In above-mentioned bauxite useful component tripping device in, the liquid outlet of grade one filter is connected with suction culvert, realizes the circulation water logging of sintered material, the one-level filter residue after circulation water logging enter next step extract link.
In above-mentioned bauxite useful component tripping device in, water logging groove is provided with stripping mill, to sintering oven export material carry out grinding refinement.
In above-mentioned bauxite useful component tripping device in, also comprise the silicon extraction unit be arranged on after aluminium sodium extraction unit; Described silicon extraction unit comprises acid inlet tube road, pickling tank, ageing tank, secondary filter and silicon returnable, acid is injected pickling tank by described acid inlet tube road, described one-level filter residue is delivered to pickling tank, proceed to after acidleach in ageing tank and carry out ageing, then filter through secondary filter, secondary filter residue is delivered to silicon returnable, and secondary filtrate enters next step and extracts link.
In above-mentioned bauxite useful component tripping device in, the liquid outlet of secondary filter is connected with acid inlet tube road.
In above-mentioned bauxite useful component tripping device in, also comprise the flocculation agent extraction unit being arranged on device end, described flocculation agent extraction unit comprises crystallization apparatus and flocculation agent returnable, the output solution of previous step is after crystallization apparatus, solids is delivered to flocculation agent returnable, liquid after crystallization is then connected with suction culvert by pipeline, and water is recycled.
In above-mentioned bauxite useful component tripping device in, arrange after being also included in acidleach flow process rare earth extraction unit, described rare earth extraction unit comprises titanium, vanadium, the scandium extraction plant of titanium extraction plant or cascade, previous step filtrate, after the extraction of rare earth extraction unit, exports solution and enters next step link.
In above-mentioned bauxite useful component tripping device in, be provided with temperature sensor and PH detector in water logging groove, pickling tank, ageing tank, crystallization apparatus; Whipping appts is provided with in described water logging groove, pickling tank, ageing tank.
In above-mentioned bauxite useful component tripping device in, suction culvert, acid inlet tube road, grade one filter liquid outlet and secondary filter liquid outlet are provided with autocontrol valve, achieve Production Flow Chart automatization manipulation.
In above-mentioned bauxite useful component tripping device in, the acid of injecting in pickling tank is sulfuric acid; The number of times of described circulation acidleach is 2-7 time, and each circulation acidleach needs the mole number injecting sulfuric acid according to the adjustment of PH measuring result.
Advantageous Effects of the present utility model is as follows:
1, the utility model provides the step by step arithmetic device of bauxite useful component, device comprises the extraction unit of each component, and devises multiple combination scheme, is convenient to producer and arranges in pairs or groups on the spot according to working condition, or carry out the extraction of whole component, also only can carry out the extraction of constituent part.Such as producer can only carry out aluminium according to self-condition, sodium extracts, also can carry out aluminium, sodium, silicon extract or comprise rare earth whole components extract.
2, the utility model compares parameter according to bauxite aluminium-silicon, select suitable temperature, sintering time and activator ratio, can realize most aluminium element reaction in bauxite is water-soluble composition, the element such as silicon in alumyte, iron is then water insoluble, after follow-up acidleach, divided component to extract, no matter for the high higher-grade bauxite of alumina silica ratio or low-grade bauxite, all applicable.
3, the aluminium sodium solution that first step obtains by the utility model is incorporated to by Pipe transfer in the production line of alumina producing producer, carry out carbon divisional processing or crystal seed separation, obtain alumina product, and reclaimed activator in production terminal---sodium carbonate, make it can again insert cycle applications in sintering oven, save cost.
4, the liquid outlet of grade one filter is extracted pipeline by valve and aluminium sodium solution and is connected with suction culvert by the utility model, achieve the circulation water logging of sintered material, can by the valve in automatic pilot piping, realize after the circulation water logging of material set point number, the more automatic aluminium sodium solution that exported to by solution extracts pipeline.
5, the liquid outlet of secondary filter is extracted pipeline with acid inlet tube road with next step solution by valve and is connected by the utility model, achieve the circulation acidleach to residue, can by the valve in automatic pilot piping, realize after the circulation acidleach of residue set point number, more automatically solution is exported to next step and extract in flow process.
6, the utility model directly silicon is extracted after solution crystallization after directly onestep extraction be flocculation agent, wherein comprise ferric sulfate, remain undrawn Tai-Ace S 150 and rare earth element, simplify extraction step, avoid the industrial cost increased for extracting remaining a small amount of aluminium, improve production efficiency, reduce cost and equipment construction expense.
7, the utility model is provided with rare earth extraction unit after step of acid dipping, by extracting rare earth metals such as the titanium in bauxite, vanadium, scandiums, further increases the utility value of ore; Above-mentioned rare earth metal is adsorbed by resin ion in the existing acidleach flow process of the utility model simultaneously, simplifies extraction procedure, saved cost.
8, extracting directly after the solution crystallization after rare earth element extraction is flocculation agent by the utility model, wherein comprise ferric sulfate, remain undrawn Tai-Ace S 150 and remain undrawn rare earth element, simplify extraction step, avoid the industrial cost increased for extracting remaining a small amount of aluminium, improve production efficiency, reduce cost and equipment construction expense.
9, the sulfuric acid added directly is converted to the products such as calcium sulfate, Tai-Ace S 150, ferric sulfate by the utility model, without the need to the recovery to sulfuric acid in device enforcement, and is translated into high value-added product, simplifies production stage, improve efficiency.
10, the utility model has installed stripping mill on water logging groove, carries out grinding refinement, make the dissolving material refinement entered in water logging groove to the material that sintering oven exports, thus improves efficiency and the speed of water logging dissolving.
11, the water after flocculation agent crystallization is connected with suction culvert by the utility model, achieves recycling of water in production line, saves raw material and discharge costs further.
12, the utility model is provided with multiple Automated condtrol valve and temperature, PH sensor in a device, and combines the alumina silica ratio parameter of actual measurement, achieves the Automated condtrol of production, has saved human cost, reduce the impact of environment on operator.
Accompanying drawing explanation
Fig. 1 is the device composition frame chart of the complete separating step of the utility model;
Fig. 2 is the principle of device schematic diagram of the utility model single water logging aluminium sodium extraction step;
Fig. 3 is the principle of device schematic diagram of the utility model circulation water logging aluminium sodium extraction step;
Fig. 4 is the water logging groove principle schematic that the utility model grinds with stripping;
Fig. 5 is point component extracting apparatus principle schematic of the utility model single acidleach;
Fig. 6 is point component extracting apparatus principle schematic of the utility model circulation acidleach;
Fig. 7 is the principle of device schematic diagram that the utility model eliminates rare earth extraction step;
Fig. 8 is the principle of device schematic diagram after the utility model rare earth extraction step is placed on step of acid dipping.
Reference numeral is as follows:
1-blending device; 3-sintering oven; 4-water logging groove; 5-grade one filter; 6-pickling tank; 8-ageing tank; 9-secondary filter; 10-extraction plant; 11-crystallization apparatus; 12-aluminium sodium solution extracts pipeline; 22-silicon returnable; 23-flocculation agent returnable; 32-suction culvert; 33-acid inlet tube road; 35-aluminium vanadine e Foerderanlage, 36-activator e Foerderanlage; 40-stripping is ground; 41-sintered material; 42-material to be dissolved; 51-aluminium sodium extraction unit; 53-silicon extraction unit; 54-rare earth extraction unit; 55-flocculation agent extraction unit; 61-bauxitic clay feed particles; 63-alumina producing terminal.
Embodiment
As shown in Figure 1, in the utility model bauxite, the tripping device of useful component comprises aluminium sodium extraction unit 51, silicon extraction unit 53, rare earth extraction unit 54 and the flocculation agent extraction unit 55 implemented step by step.Wherein rare earth extraction unit 54 also can omit and merge with flocculation agent extraction unit 55, can also be placed on the position of silicon extraction unit 53 back or a rear step.Simultaneous oxidation aluminium manufacturer can arrange in pairs or groups on the spot according to existing condition, or carries out the extraction of whole component, also only can carry out the extraction of constituent part.Such as producer can only carry out aluminium according to self-condition, sodium extracts, also can according to carrying out aluminium, sodium, silicon extraction or carrying out other the whole components extractions except rare earth.
As shown in Figures 2 and 3, aluminium sodium extraction unit 51 comprises suction culvert 32, aluminium sodium solution sets gradually after extracting pipeline 12, aluminium vanadine e Foerderanlage 35, activator e Foerderanlage 36, blending device 1 and blending device 1 sintering oven 3, water logging groove 4 and grade one filter 5; Water is injected water logging groove 4 by suction culvert 32, and liquid outlet and the aluminum solutions of grade one filter 5 extract pipeline 12 and be connected; The activator granulate that the bauxitic clay feed particles 61 of aluminium vanadine e Foerderanlage 35 conveying and activator e Foerderanlage 36 are carried in blending device 1 in proportion after Homogeneous phase mixing, then is placed in sintering oven 3 and sinters.Sintered product after water logging groove 4 water logging, then filters through grade one filter 5, and one-level filtrate enters aluminium sodium solution and extracts pipeline 12, and one-level filter residue then enters next step and extracts link; The activator that pipeline 12 production terminal 63 of extracting aluminium sodium solution reclaims enters activator e Foerderanlage 62 again, realizes recycling of activator.
The liquid outlet of grade one filter 5 extracts pipeline 12 by valve and aluminium sodium solution and is connected (see Fig. 2), the liquid outlet of grade one filter 5 also can extract pipeline 12 by valve with suction culvert 32 and aluminium sodium solution simultaneously and be connected, realize the circulation water logging (see Fig. 3) of sintered material, wherein the difference of Fig. 2 and Fig. 3 is only whether adopt circulation water logging, although circulation water logging adds the flow process of whole leaching, the extraction yield of aluminium can be improved.
Need in sintering process to add activator, wherein first-selected sodium carbonate, also can adopt sodium hydroxide.Sintered product after water logging groove 4 fully stirs, then filters through grade one filter 5, and after one-level filtrate multi-reflow to water logging groove 4 pairs of residue leachings, finally enter aluminium sodium solution and extract pipeline 12, one-level filter residue then enters next step and extracts link.The number of times of water logging of wherein circulating is 2-6 time, tests and chooses, and can adopt aborning by the automatic control to valve, realize the dipped journey of the recirculated water of set point number according to different materials.
No matter for higher-grade bauxite or the low-grade bauxite of high aluminium silicon ratio, by selecting suitable temperature, sintering time and activator ratio, can realize most aluminium element reaction in bauxite is water-soluble composition, the element such as silicon in alumyte, iron is then water insoluble, after follow-up acidleach, divided component to extract.The aluminium sodium solution major ingredient that aluminium sodium extraction unit 51 obtains is sodium aluminate solution, can be directly incorporated in the production line of existing aluminum oxide producer, the decomposition of crystal seed of such as aluminum oxide or carbonation decompsition process flow process obtain alumina product, and have reclaimed activator---sodium carbonate or sodium hydroxide; Activator can insert sintering oven as activator cycle applications by activator e Foerderanlage 62 again, has saved cost.Other calcium, iron, silicon and rare earth element then become residue and enter next step processing links.
As shown in Figure 4, in order to improve the water-soluble of sintered product and leaching efficiency, water logging groove 4 is provided with stripping mill 40, inject water and sintered material 41 in the import of stripping mill 40 simultaneously, while grinding refinement is carried out to sintered material 41, increase water logging efficiency, make material to be dissolved 42 refinement further entered in water logging groove 4, and substantially increase efficiency and the speed of water logging dissolving.
As shown in Fig. 5 to Fig. 8, silicon extraction unit 53 comprises acid inlet tube road 33, pickling tank 6, ageing tank 8, secondary filter 9 and silicon returnable 22, acid is injected pickling tank 6 by acid inlet tube road 33, one-level filter residue is delivered to pickling tank 6, proceed to after acidleach in ageing tank 8 and carry out ageing, then filter through secondary filter 9, secondary filter residue is delivered to silicon returnable 22, and secondary filtrate enters next step rare earth extraction link (see Fig. 5).What wherein inject in pickling tank is sulfuric acid, the principle that silicon extracts is by acidleach process, iron in residue, remain a small amount of aluminium and rare earth metal is dissolved in sulfuric acid, and hydrogen ion in liquid and silicon synthesize silicic acid, after the ageing under certain temperature and time conditions, become fine silicic acid.
Wherein in order to realize the circulation acidleach to residue, the liquid outlet of secondary filter (9) can extracting link with acid inlet tube road (33) and next step be connected (see Fig. 6) simultaneously.Wherein the difference of Fig. 5 and Fig. 6 is only whether adopt circulation acidleach, the object of circulation acidleach is to increase the solubleness of residue in acid, although add flow process and the step of leaching, the number of times of usual circulation acidleach is 2-7 time, test according to different materials and choose, and can adopt aborning by the automatic control to valve, after realizing the circulation acidleach to residue set point number, more automatically solution is exported to next step and extract in flow process.
As shown in Figure 7, whole device can save rare earth extraction unit 54, namely the solution after silicon extraction can directly enter flocculation agent extraction step, flocculation agent extraction unit is last part of device, comprise crystallization apparatus 11 and flocculation agent returnable 23, aforesaid secondary filtrate is after crystallization apparatus 11, temperature control evaporative crystallization under certain envrionment temperature, flocculation agent returnable 23 is delivered to after solids crystallization, the water that crystallization is reclaimed is connected with suction culvert 32, or be temporarily stored in water reservoir, get for suction culvert pump, water is recycled, further save cost.
The principle of work of flocculation agent extraction step is, solution after sulfuric acid to leach comprises the sulfuric acid thing of silicic acid, ferric sulfate, a small amount of Tai-Ace S 150 and rare earth element, its mesosilicic acid is respectively after aforesaid silicon extracts, the sulfuric acid thing of remaining ferric sulfate, Tai-Ace S 150 and rare earth element can by being mixed into flocculation agent after crystallization, be converted into product, for Industrial Wastewater Treatment.The advantage of this simplification step is without the need to being separated with aluminium remaining iron, also need not reclaim sulfuric acid simultaneously, avoids link and increases and cause industrialization step complexity, reduce production cost.
As shown in Figure 8, rare earth extraction unit 54 is added after acidleach flow process, rare earth extraction unit 54 can be arranged on the position before or after silicon extraction unit 53, rare earth extraction unit 54 comprises titanium, vanadium, the scandium extraction plant of titanium extraction plant or cascade, previous step filtrate, after rare earth extraction unit 54 extracts, exports solution and enters next step link.
The extraction of rare earth metal adopts existing ripe scheme, the scheme of ionic adsorption after usual employing acidleach, after such as scandium being adopted acidleach, then adopt massfraction be 1% P507 resin extraction, and then sodium hydroxide reextraction is carried out to resin, rare earth scandium can be obtained.After the extraction of rare earth is placed on step of acid dipping by the utility model, therefore eliminate the step of acid dipping required for independent resin extraction, further simplify program.
This device optimizes the production line of alumyte synthesized utilization in maximum, make that water obtains circulation, acid is fully used, avoid the pollution to sintering oven and damage, and connect with existing alumina producing flow process as far as possible, with arranging multiple temperature, PH sensor sensor in timer, and combine the monitoring to alumina silica ratio parameter and the control to automatic valve, realize the automatization of industry, save human cost, avoid the error thought and operate, and reduce the impact of severe environment on operator ' s health.
Claims (10)
1. the tripping device of useful component in a bauxite, it is characterized in that: comprise aluminium sodium extraction unit (51), sintering oven (3), water logging groove (4) and grade one filter (5) that described aluminium sodium extraction unit (51) sets gradually after comprising suction culvert (32), aluminium sodium solution extraction pipeline (12), aluminium vanadine e Foerderanlage (35), activator e Foerderanlage (36), blending device (1) and blending device (1);
Water is injected water logging groove (4) by described suction culvert (32), and liquid outlet and the aluminium sodium solution of described grade one filter (5) extract pipeline (12) and be connected; The bauxitic clay feed particles (61) that aluminium vanadine e Foerderanlage (35) is carried and the activator granulate that activator e Foerderanlage (36) is carried are in blending device (1) in proportion after Homogeneous phase mixing, be placed in sintering oven (3) again to sinter, sintered product is after water logging groove (4) water logging, again after grade one filter (5) filters, one-level filtrate enters aluminium sodium solution and extracts pipeline (12), and one-level filter residue then enters next step and extracts link;
The activator that pipeline (12) production terminal (63) of extracting described aluminium sodium solution reclaims enters activator e Foerderanlage (62) again, realizes recycling of activator.
2. the tripping device of useful component in bauxite according to claim 1, it is characterized in that: the liquid outlet of described grade one filter (5) is connected with suction culvert (32), realize the circulation water logging of sintered material, the one-level filter residue after circulation water logging enters next step and extracts link.
3. the tripping device of useful component in bauxite according to claim 1, is characterized in that: described water logging groove (4) is provided with stripping mill (40), carries out grinding refinement to the material that sintering oven (3) exports.
4., according to the tripping device of useful component in one of any described bauxite of claims 1 to 3, it is characterized in that: also comprise the silicon extraction unit (53) be arranged on after aluminium sodium extraction unit (51);
Described silicon extraction unit (53) comprises acid inlet tube road (33), pickling tank (6), ageing tank (8), secondary filter (9) and silicon returnable (22), pickling tank (6) is injected in acid by described acid inlet tube road (33), described one-level filter residue is delivered to pickling tank (6), proceed to after acidleach in ageing tank (8) and carry out ageing, then filter through secondary filter (9), secondary filter residue is delivered to silicon returnable (22), and secondary filtrate enters next step and extracts link.
5. the tripping device of useful component in bauxite according to claim 4, is characterized in that: the liquid outlet of described secondary filter (9) is connected with acid inlet tube road (33).
6. the tripping device of useful component in bauxite according to claim 4, it is characterized in that: also comprise the flocculation agent extraction unit (55) being arranged on device end, described flocculation agent extraction unit comprises crystallization apparatus (11) and flocculation agent returnable (23), the output solution of previous step is after crystallization apparatus, solids is delivered to flocculation agent returnable (23), liquid after crystallization is then connected with suction culvert (32) by pipeline, and water is recycled.
7. the tripping device of useful component in bauxite according to claim 4, it is characterized in that: the rare earth extraction unit (54) arranged after being also included in acidleach flow process, described rare earth extraction unit (54) comprises titanium, vanadium, the scandium extraction plant of titanium extraction plant or cascade, previous step filtrate, after rare earth extraction unit (54) extraction, exports solution and enters next step link.
8. the tripping device of useful component in bauxite according to claim 6, is characterized in that: be provided with temperature sensor and PH detector in described water logging groove (4), pickling tank (6), ageing tank (8), crystallization apparatus (11); Described water logging groove (4), pickling tank (6), ageing tank are provided with whipping appts in (8).
9. the tripping device of useful component in bauxite according to claim 4, it is characterized in that: described suction culvert (32), acid inlet tube road (33), grade one filter (5) liquid outlet and secondary filter (9) liquid outlet are provided with autocontrol valve, achieve the automatization manipulation of Production Flow Chart.
10. the tripping device of useful component in bauxite according to claim 4, is characterized in that: the acid of injecting in described pickling tank (6) is sulfuric acid; The number of times of described circulation acidleach is 2-7 time, and each circulation acidleach needs the mole number injecting sulfuric acid according to the adjustment of PH measuring result.
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| CN201520045439.6U CN204550689U (en) | 2015-01-22 | 2015-01-22 | The tripping device of useful component in a kind of bauxite |
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| CN201520045439.6U CN204550689U (en) | 2015-01-22 | 2015-01-22 | The tripping device of useful component in a kind of bauxite |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108913906A (en) * | 2018-07-24 | 2018-11-30 | 山西中谱能源科技有限公司 | The method that plasma-activated solid waste extracts silicon, aluminium and your a variety of dilute rare earth metal |
| US11345976B2 (en) | 2017-06-23 | 2022-05-31 | Central America Nickel Inc. | Recovery of scandium and vanadium values from feedstocks using ultrasound-assisted extraction |
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2015
- 2015-01-22 CN CN201520045439.6U patent/CN204550689U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11345976B2 (en) | 2017-06-23 | 2022-05-31 | Central America Nickel Inc. | Recovery of scandium and vanadium values from feedstocks using ultrasound-assisted extraction |
| CN108913906A (en) * | 2018-07-24 | 2018-11-30 | 山西中谱能源科技有限公司 | The method that plasma-activated solid waste extracts silicon, aluminium and your a variety of dilute rare earth metal |
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Granted publication date: 20150812 Termination date: 20190122 |