CN114752761B - Method for reinforcing grinding and leaching efficiency of vanadium shale by utilizing microwaves - Google Patents
Method for reinforcing grinding and leaching efficiency of vanadium shale by utilizing microwaves Download PDFInfo
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- 229910052720 vanadium Inorganic materials 0.000 title claims abstract description 176
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 title claims abstract description 176
- 238000002386 leaching Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 65
- 238000000227 grinding Methods 0.000 title claims abstract description 63
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000005728 strengthening Methods 0.000 claims abstract description 18
- 238000010791 quenching Methods 0.000 claims abstract description 17
- 230000000171 quenching effect Effects 0.000 claims abstract description 17
- 239000002002 slurry Substances 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000012216 screening Methods 0.000 claims abstract description 6
- 239000002245 particle Substances 0.000 claims abstract 4
- 238000009434 installation Methods 0.000 claims description 38
- 239000000463 material Substances 0.000 claims description 27
- 239000000126 substance Substances 0.000 claims description 9
- 230000002708 enhancing effect Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000005265 energy consumption Methods 0.000 abstract description 28
- 230000000694 effects Effects 0.000 abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052799 carbon Inorganic materials 0.000 abstract description 12
- 238000000605 extraction Methods 0.000 abstract description 11
- 239000002131 composite material Substances 0.000 description 12
- 230000007547 defect Effects 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 229910052500 inorganic mineral Inorganic materials 0.000 description 5
- 239000010445 mica Substances 0.000 description 5
- 229910052618 mica group Inorganic materials 0.000 description 5
- 239000011707 mineral Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 229910018516 Al—O Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000005906 dihydroxylation reaction Methods 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010494 dissociation reaction Methods 0.000 description 2
- 230000005593 dissociations Effects 0.000 description 2
- 239000010433 feldspar Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229910052683 pyrite Inorganic materials 0.000 description 2
- 239000011028 pyrite Substances 0.000 description 2
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910052604 silicate mineral Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000004537 pulping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910001784 vanadium mineral Inorganic materials 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
- C22B4/04—Heavy metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/20—Obtaining niobium, tantalum or vanadium
- C22B34/22—Obtaining vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B4/00—Electrothermal treatment of ores or metallurgical products for obtaining metals or alloys
- C22B4/08—Apparatus
-
- 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
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- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a method for reinforcing grinding and leaching efficiency of vanadium shale by utilizing microwaves. The technical proposal is as follows: crushing and screening the raw vanadium shale ores to obtain the raw vanadium shale ores with the particle size smaller than 1.5mm and the particle size of 1.5-10.0 mm. Starting a continuous microwave treatment device for strengthening the grinding and leaching efficiency of the vanadium shale, feeding the raw ore of the vanadium shale with the grain size of 1.5-10.0 mm from a feed inlet at the speed of 60-150 kg/h, and performing water quenching according to the mass ratio of the obtained microwave treated vanadium shale to water of 1:1-3 to obtain water quenching slurry; mixing the water quenched slurry with the vanadium shale raw ore with the grain diameter less than 1.5mm and the vanadium shale raw ore with the grain diameter of 1.5-10.0 mm according to the mass ratio of 1:1.5-2, grinding, and allowing the obtained ground ore product to enter a leaching process. The method has the advantages of short treatment time, low energy consumption, no carbon emission, good grindability and leaching rate strengthening effect of the vanadium shale, simple operation and high treatment efficiency, and is suitable for microwave strengthening of a vanadium extraction system of the vanadium shale by a full wet method.
Description
Technical Field
The invention belongs to the technical field of shale vanadium extraction. In particular to a method for reinforcing the grinding and leaching efficiency of vanadium shale by utilizing microwaves.
Background
Vanadium-containing stone coal (vanadium shale) is an important vanadium resource, and shale vanadium extraction becomes an important way and demand guarantee for development and utilization of vanadium resources in China. The grinding and leaching of the vanadium shale are two important links in the shale vanadium extraction process, and the comprehensive recovery rate and the vanadium extraction cost of the shale vanadium are determined by the grinding and leaching efficiency. Microwaves are widely focused as a clean energy source in the field of mining and metallurgy, particularly in the aspects of auxiliary grinding, enhanced leaching and the like.
Junpeng Wang et al (Junpeng Wang, tao Jinag, yajin Liu, and Xiangxin Xue. Effect of microwave irradiation on the grinding and magnetic separation characteristics of vanadium titano-magnetite [ J ]. Metallurgical Research & Technology,2019,116, 419:1-10) enhanced the grinding effect of vanadium titano-magnetite using microwaves. At a microwave power of 2kW and a treatment time of 4min, the grindability (in terms of crushing rate) of the vanadium titano-magnetite is improved by a maximum of about 159.1%. On the one hand, although the method can improve the grindability of the vanadium-containing minerals to a certain extent, continuous irradiation is required to be carried out for 4 minutes under the condition of 2kw, and the energy consumption is high; and the ore grinding efficiency is improved by 159.1 percent, and the lifting amplitude is not large. On the other hand, the method belongs to discontinuous microwave treatment, and when a large amount of vanadium-containing shale is required to be treated, the device is relatively complex to operate and has low efficiency. Therefore, the existing microwave reinforced vanadium-containing mineral grinding technology has the technical defects of high treatment energy consumption, small improvement degree of the grindability of vanadium minerals, complex operation and low treatment efficiency.
Li Yinli et al (Li Yinli, song Yonghui, wang Kepeng, chen Xiangyang. Research on stone coal microwave leaching vanadium extraction process [ J ]. Nonferrous metals (smelting part), 2016, 03:36-44.) conducted a microwave enhanced leaching study on vanadium-containing stone coal using a microwave solution chemical reactor. It was found that when the microwave power was 800W, the microwave irradiation time was 60min, the sulfuric acid concentration was 13% and the liquid-solid ratio was 2:1 (mL/g), the vanadium leaching rate was 83.2%; leaching is carried out under the same leaching condition by adopting a conventional heating mode, and the leaching rate of 73.63% of vanadium can be obtained. Although the method can obtain higher leaching rate of vanadium, the method needs continuous microwave irradiation for 60min, has long treatment time and high energy consumption, and compared with the conventional method, the leaching rate is improved by less than 10 percent. In addition, the microwave solution chemical reactor belongs to an intermittent treatment device, continuous operation cannot be realized, and when a large amount of vanadium shale is required to be treated, the operation is complex and the efficiency is low. The prior technology of microwave enhanced leaching is described, and has the defects of long treatment time, high energy consumption, small promotion degree of vanadium leaching rate, complex device operation and low efficiency.
Yi-zhongYuan et al (Yi-zhongYuan, yi-minZhang, tao Liu1, andTie-jun chen. Comparison of the mechanisms of microwave roasting and conventional roasting and of their effects on vanadium extraction from stone coal [ J ]. International Journal ofMinerals, metallurgy andMaterials,2015,22 (5): 476-482) roasting vanadium shale at 800 ℃ for 30min, leaching the roasted sample to obtain 84% vanadium leaching rate; compared with the conventional roasting for 60min at 900 ℃, the leaching rate of vanadium is improved by 13 percent. Compared with the conventional roasting mode, the roasting temperature and the roasting time are shortened, and the leaching rate is improved; but still has the technical defects of overhigh treatment temperature, long treatment time and high energy consumption; furthermore, the microwave roasting temperature is far above the combustion temperature of carbon in the vanadium shale, and a large amount of carbon emission is generated in the treatment process. In addition, the method belongs to discontinuous microwave treatment, and when a large amount of vanadium-containing shale is required to be treated, the device is relatively complex to operate and has low efficiency. Therefore, the existing technology for strengthening the leaching efficiency of vanadium-containing minerals through microwave roasting has the technical defects of long microwave treatment time, high treatment energy consumption, large carbon emission, complex operation and low treatment efficiency.
In summary, the existing technology for reinforcing the grinding and leaching efficiency of the vanadium shale by utilizing microwaves has the technical defects of long treatment time, high energy consumption, large carbon emission, small improvement degree of the vanadium leaching efficiency, complex device operation and low treatment efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and aims to provide a method for reinforcing the grinding and leaching efficiency of the vanadium shale by utilizing microwaves, which has the advantages of short treatment time, low energy consumption, no carbon emission, good grindability and leaching rate reinforcing effect of the vanadium shale, simple device operation and high treatment efficiency.
In order to achieve the above purpose, the technical scheme adopted by the invention comprises the following specific steps:
step 1, crushing and screening the raw vanadium shale ore to obtain the raw vanadium shale ore with the grain diameter smaller than 1.5mm and the raw vanadium shale ore with the grain diameter of 1.5-10.0 mm.
And 2, carrying out microwave treatment by adopting a continuous microwave treatment device for enhancing the grinding and leaching efficiency of the vanadium shale, setting the transportation speed of the conveying belt, starting the switches of all wave sources in the continuous microwave treatment device, and starting the conveying belt.
Feeding raw ore of vanadium shale with the grain size of 1.5-10.0 mm from a feed inlet of the continuous microwave treatment device, wherein the feeding amount is 60-150 kg/h; and obtaining the vanadium shale subjected to microwave treatment from a discharge port of the continuous microwave treatment device.
And 3, placing the vanadium shale subjected to microwave treatment into water for water quenching according to the mass ratio of the vanadium shale subjected to microwave treatment to water of 1:1-3, so as to obtain water quenching slurry.
Mixing the water quenching slurry with the raw vanadium shale ore with the grain diameter smaller than 1.5mm and grinding according to the mass ratio of the raw vanadium shale ore with the grain diameter smaller than 1.5mm to the raw vanadium shale ore with the grain diameter of 1.5-10.0 mm of 1:1.5-2, so as to obtain a grinding product; the ground ore product enters a subsequent leaching process.
And 4, after all the materials are processed, closing a switch of all the wave sources, and closing a material conveying belt.
The chemical components of the vanadium shale are as follows: the content of C is 4-25wt%; v (V) 2 O 5 The content is more than or equal to 0.45 weight percent.
The microwave power of the wave source is 500-1500W.
The transport speed of the conveyor belt 9 is na to 2na/min.
The structure of the continuous microwave treatment device for strengthening the grinding and leaching efficiency of the vanadium shale is as follows: the continuous microwave treatment device consists of a cavity body formed by 4 rectangular flat plates, 4n wave sources and a material conveying belt; the length multiplied by the width=2na×a of the rectangular flat plates, each rectangular flat plate is uniformly provided with n wave sources respectively, 4n wave sources are the same, and n is a natural number of 2-10; the cavity is horizontally provided with a material conveying belt, the height of the upper surface of the conveying belt from the top of the cavity is 0.52-0.58 a, and the width of the conveying belt is 0.9-0.95 a.
The four rectangular flat plates are respectively a top plate, a left side plate, a bottom plate and a right side plate, and the top plate, the left side plate, the bottom plate and the right side plate are respectively provided with a top plate wave source, a left side plate wave source, a bottom plate wave source and a right side plate wave source correspondingly in sequence; each wave source consists of 1 magnetron and 1 waveguide, and each wave source is rectangular on the mounting surface of the rectangular flat plate.
Mounting position of each wave source on the respective rectangular flat plate:
for simplicity of description, it is assumed that the cavity is unfolded to a plane by separating the cavity from the intersection of the top plate and the right plate; and the following steps: the inlet end of the material is the initial edge of each rectangular flat plate, the parting line of the top plate is the upper edge of the cavity unfolding surface, namely, the first horizontal line of the cavity unfolding surface is the upper edge of the top plate, the second horizontal line of the cavity unfolding surface is the upper edge of the left side plate, the third horizontal line of the cavity unfolding surface is the upper edge of the bottom plate, and the fourth horizontal line of the cavity unfolding surface is the upper edge of the right side plate.
The mounting position of the top plate wave source on the top plate: the 1 st roof wave source is positioned at a/2 from the roof start edge, the 2 nd roof wave source is positioned at 2a (2-1) +a/2 from the roof start edge, the 3 rd roof wave source is positioned at 2a (3-1) +a/2 from the roof start edge, … …, and so on, the nth roof wave source is positioned at 2a (n-1) +a/2 from the roof start edge; the distance between the mounting surface center O1 of each roof wave source and the upper edge line of the roof is a/4, and the long side of the mounting surface of each roof wave source is perpendicular to the upper edge line of the roof.
Left side board wave source is in the mounted position of left side board: the 1 st left-side plate wave source is positioned at a/2 from the starting edge of the left-side plate, the 2 nd left-side plate wave source is positioned at 2a (2-1) +a/2 from the starting edge of the left-side plate, the 3 rd left-side plate wave source is positioned at 2a (3-1) +a/2 from the starting edge of the left-side plate, … …, and so on, the nth left-side plate wave source is positioned at 2a (n-1) +a/2 from the starting edge of the left-side plate; the distance between the installation surface center O2 of each left side plate wave source and the upper edge line of the left side plate is a/4, and the included angle theta between the long edge of the installation surface of each left side plate wave source and the upper edge line of the left side plate is 0-45 degrees.
The installation position of the bottom plate wave source on the bottom plate: the 1 st bottom plate wave source is positioned at 3a/2 from the bottom plate starting edge, the 2 nd bottom plate wave source is positioned at 2a (2-1) +3a/2 from the bottom plate starting edge, the 3 rd bottom plate wave source is positioned at 2a (3-1) +3a/2 from the bottom plate starting edge, … …, and so on, the nth bottom plate wave source is positioned at 2a (n-1) +3a/2 from the bottom plate starting edge; the distance between the installation surface center O3 of each bottom plate wave source and the upper edge line of the bottom plate is a/4, and the long side of the installation surface of each bottom plate wave source is parallel to the upper edge line of the bottom plate.
Right side board wave source is in the mounted position of right side board: the 1 st right side plate wave source is positioned at 3a/2 from the starting edge of the right side plate, the 2 nd right side plate wave source is positioned at 2a (2-1) +3a/2 from the starting edge of the right side plate, the 3 rd right side plate wave source is positioned at 2a (3-1) +3a/2 from the starting edge of the right side plate, … …, and so on, the nth right side plate wave source is positioned at 2a (n-1) +3a/2 from the starting edge of the right side plate; the distance between the installation surface center O4 of each right side plate wave source and the upper edge line of the right side plate is a/4, and the included angle beta between the long side of the installation surface of each right side plate wave source and the upper edge line of the right side plate is 90-theta.
The long side l of the rectangle is a/6-a/3.
By adopting the technical scheme, the invention has the following beneficial effects:
1. the invention is based on simulation and experimental verification of an electric-magnetic-thermal-stress composite physical field in a cavity of a microwave treatment device, and adopts a continuous microwave treatment device (hereinafter referred to as a continuous microwave treatment device) for strengthening the grinding and leaching efficiency of vanadium shale to carry out microwave treatment. The cavity and the wave sources of the continuous microwave treatment device are subjected to layout optimization, n wave sources corresponding to the wave sources are respectively and regularly arranged at different positions and different angles of the outer walls of the 4 flat plates of the cavity, so that the optimal distribution of the composite physical field in the cavity is realized, the induction strengthening effect of microwaves on the heterogeneous dissociation of the vanadium shale is fully exerted, and the grindability of the vanadium shale is greatly improved; in addition, the continuous treatment mode of the multi-wave source can realize that the vanadium shale is subjected to continuous multi-dimensional irradiation in the running process in the cavity, so that the treatment effect is improved and the treatment period is shortened.
According to the invention, the high-efficiency pretreatment of the vanadium shale can be realized within 1-2 min and below the combustion temperature of carbon, so that the grindability (based on the crushing rate) of the vanadium shale is improved by more than 200%, and meanwhile, the total ore grinding energy consumption (comprising the microwave pretreatment energy consumption and the ore grinding energy consumption of a microwave pretreatment product) is reduced by more than 40%, and the treatment cycle is short, the treatment effect is good and the energy consumption is low.
2. Aiming at the characteristics of embedding and distributing fine particles of pyrite and carbonaceous wave absorbing substances of vanadium shale and fine particles of mica and feldspar non-wave absorbing silicate minerals and the evolution rule of dielectric characteristics of vanadium-containing minerals in the treatment process, the invention greatly strengthens the dehydroxylation reaction of the vanadium-containing mica Al-O (OH) octahedron in the acid leaching process by a continuous microwave treatment device based on the simulation of a composite physical field, namely, the microwave cavity and n stages (the first wave source of each flat plate is called the first stage, the second wave source of each flat plate is called the second stage, … … and so on, the nth wave source of each flat plate is called the nth stage) wave source and the special design of a continuous transmission device, continuously excites the multistage microwave plastical effect in the pretreatment process, so that the treated vanadium shale is continuously and alternately subjected to the action of n electric-magnetic-thermal-stress composite physical fields in the cavity, and the distribution form of the composite physical field greatly strengthens the dehydroxylation reaction of the vanadium-containing mica Al-O (OH) octahedron the surface, improves the reactivity of the vanadium in the acid leaching process, and enhances the leaching rate of the vanadium leaching by more than 15% under the same condition.
3. The invention combines a multistage continuous distribution mechanism of an n-level wave source of a continuous microwave processing device with a material conveying belt, and adjusts the irradiation power, irradiation time and conveying speed of the material conveying belt of each level wave source in the continuous microwave process of the vanadium shale, so as to realize optimized matching; on one hand, the operation steps of the microwave treatment of the vanadium shale are simplified, and the batch continuous treatment of the vanadium shale can be realized under simple operation; on the other hand, as the treated vanadium shale continuously passes through n electric-magnetic-thermal-stress composite physical fields, the continuous and alternate radiant energy can greatly reduce the radiant non-uniformity in a plurality of physical fields in the cavity of the microwave device, and the high grindability and leaching efficiency of the vanadium shale can be obtained in 1-2 min, and the production efficiency is high.
4. In the process of the online microwave treatment of the vanadium shale, the continuous microwave treatment device can be arranged between the crushing process and the ore grinding process of the vanadium shale due to short treatment period, low overall temperature and no carbon emission; the method can realize the organic combination among the grinding process, the microwave treatment process and the ore grinding process through simple series combination, and is suitable for a vanadium extraction system of the vanadium shale by the all-wet method.
Therefore, the method has the characteristics of short treatment time, low energy consumption, no carbon emission, good grindability and leaching rate strengthening effect of the vanadium shale, simple operation and high treatment efficiency, and is suitable for a microwave strengthening method of a vanadium extraction system of the vanadium shale by an all-wet method.
Drawings
FIG. 1 is a schematic structural view of a continuous microwave treatment device for enhancing the grinding and leaching efficiency of vanadium shale, which is adopted by the invention;
fig. 2 is an expanded schematic view of the structure shown in fig. 1.
Detailed Description
The invention is further described in connection with the accompanying drawings and detailed description, without limiting the scope thereof:
in order to avoid repetition, the related structure of the continuous microwave treatment device for strengthening the grinding and leaching efficiency of the vanadium shale adopted in the specific embodiment is described as follows, and the description is omitted in the examples:
as shown in fig. 1, the four rectangular flat plates are respectively a top plate 1, a left side plate 3, a bottom plate 5 and a right side plate 7, and the top plate 1, the left side plate 3, the bottom plate 5 and the right side plate 7 are respectively provided with a top plate wave source 8, a left side plate wave source 2, a bottom plate wave source 4 and a right side plate wave source 6 in sequence correspondingly; each wave source consists of 1 magnetron and 1 waveguide, and each wave source is rectangular on the mounting surface of the rectangular flat plate.
For simplicity of description, it is assumed that the cavity shown in fig. 1 is separated from the intersection of the top plate 1 and the right side plate 7, and the cavity is unfolded into the plan view shown in fig. 2; and the following steps: the inlet end of the material is the initial edge of each rectangular flat plate, the parting line of the top plate 1 is the upper edge of the cavity unfolding surface, namely, the first horizontal line of the cavity unfolding surface is the upper edge of the top plate 1, the second horizontal line of the cavity unfolding surface is the upper edge of the left side plate 3, the third horizontal line of the cavity unfolding surface is the upper edge of the bottom plate 5, and the fourth horizontal line of the cavity unfolding surface is the upper edge of the right side plate 7.
The ore grinding apparatus, leaching apparatus and leaching system used in this example were the same as in comparative example 1.
Comparative example 1
Crushing 10kg of raw vanadium shale ores to 0-10 mm, and directly pulping and grinding, wherein the grinding equipment is a ball mill with 1000W power and 1kg single treatment capacity; the leaching equipment of the ground ore product is a magnetic stirrer, and the leaching system is as follows: h 2 SO 4 35wt.% of the amount is used, 8 hours is needed in leaching, the leaching temperature is 95 ℃, and the CaF is used 2 The amount was 5wt.%, liquid-solid ratio was 1.5mL/g.
Example 1
A method for reinforcing grinding and leaching efficiency of vanadium shale by utilizing microwaves. The method in this embodiment comprises the following steps:
step 1, crushing and screening the raw vanadium shale ore to obtain the raw vanadium shale ore with the grain diameter smaller than 1.5mm and the raw vanadium shale ore with the grain diameter of 1.5-10.0 mm.
And 2, carrying out microwave treatment by adopting a continuous microwave treatment device for enhancing the grinding and leaching efficiency of the vanadium shale, setting the transportation speed of the conveying belt 9, starting all wave sources in the continuous microwave treatment device, and starting the conveying belt 9.
Feeding raw ore of vanadium shale with the grain size of 1.5-10.0 mm from a feed inlet of the obtained continuous microwave treatment device, wherein the feeding amount is 60kg/h; and obtaining the vanadium shale subjected to microwave treatment from a discharge port of the continuous microwave treatment device.
And 3, placing the vanadium shale subjected to microwave treatment into water for water quenching according to the mass ratio of the vanadium shale subjected to microwave treatment to water of 1:1, so as to obtain water quenching slurry.
Mixing the water quenching slurry with the raw vanadium shale ore with the grain diameter smaller than 1.5mm and grinding according to the mass ratio of the raw vanadium shale ore with the grain diameter smaller than 1.5mm to the raw vanadium shale ore with the grain diameter of 1.5-10.0 mm of 1:1.5, thus obtaining a grinding product; the ground ore product enters a subsequent leaching process.
And 4, after all materials are processed, closing a switch of all wave sources, and closing a material conveying belt (9).
The chemical components of the vanadium shale are as follows: the content of C is 4wt%; v (V) 2 O 5 The content was 0.45wt%.
The present embodiment is detected: the grindability (calculated by the crushing rate) of the vanadium shale is 0.1501, which is improved by 185.9%; grinding for 17min; the energy consumption is 0.3266 kw.h/Kg (wherein, the microwave treatment energy consumption is 0.0443 kw.h/Kg and the ore grinding energy consumption is 0.2833 kw.h/Kg), which is reduced by 48.42 percent; the leaching rate of the ground ore product is 73.01 percent, which is improved by 15.14 percent.
The embodiment relates to a continuous microwave treatment device for strengthening the grinding and leaching efficiency of vanadium shale. As shown in fig. 1, the continuous microwave treatment device is composed of a cavity enclosed by 4 rectangular flat plates, 4×n wave sources and a material conveying belt 9. The length multiplied by the width=2na×a of the rectangular flat plates, each rectangular flat plate is uniformly provided with n wave sources respectively, and the 4n wave sources are the same; a material conveying belt 9 is horizontally arranged in the cavity, the height of the upper surface of the conveying belt 9 from the top of the cavity is 0.55a, and the width of the conveying belt 9 is 0.92a; the transport speed of the conveyor belt 9 was 1.5na/min.
In this embodiment: said n=5; the microwave power of the wave source is 500W.
Mounting position of each wave source on the respective rectangular flat plate:
the mounting position of the roof wave source 8 on the roof 1 is as shown in fig. 2: the 1 st roof wave source 8 is located at a/2 from the start edge of the roof 1, the 2 nd roof wave source 8 is located at 2a+a/2 from the start edge of the roof 1, the 3 rd roof wave source 8 is located at 4a+a/2 from the start edge of the roof 1, the 4 th roof wave source 8 is located at 6a+a/2 from the start edge of the roof 1, and the 5 th roof wave source 8 is located at 8a+a/2 from the start edge of the roof 1. The center O1 of the mounting surface of each roof wave source 8 is a/4 from the upper edge line of the roof 1, and the long side of the mounting surface of each roof wave source 8 is perpendicular to the upper edge line of the roof 1.
The mounting position of the left-side plate wave source 2 on the left-side plate 3 is as shown in fig. 2: the 1 st left-side plate wave source 2 is positioned at a/2 from the starting edge of the left-side plate 3, the 2 nd left-side plate wave source 2 is positioned at 2a+a/2 from the starting edge of the left-side plate 3, the 3 rd left-side plate wave source 2 is positioned at 4a+a/2 from the starting edge of the left-side plate 3, the 4 th left-side plate wave source 2 is positioned at 6a+a/2 from the starting edge of the left-side plate 3, and the 5 th left-side plate wave source 2 is positioned at 8a+a/2 from the starting edge of the left-side plate 3. The distance between the center O2 of the installation surface of each left-side plate wave source 2 and the upper edge line of the left-side plate 3 is a/4, and the included angle theta between the long edge of the installation surface of each left-side plate wave source 2 and the upper edge line of the left-side plate 3 is 30 degrees.
The installation position of the bottom plate wave source 4 on the bottom plate 5 is as shown in fig. 2: the 1 st floor wave source 4 is located at 3a/2 from the starting edge of the floor 5, the 2 nd floor wave source 4 is located at 2a+3a/2 from the starting edge of the floor 5, the 3 rd floor wave source 4 is located at 4a+3a/2 from the starting edge of the floor 5, the 4 th floor wave source 4 is located at 6a+3a/2 from the starting edge of the floor 5, and the 5 th floor wave source 4 is located at 8a+3a/2 from the starting edge of the floor 5. The center O3 of the installation surface of each floor wave source 4 is a/4 from the upper edge line of the floor 5, and the long side of the installation surface of each floor wave source 4 is parallel to the upper edge line of the floor 5.
The installation position of the right side plate wave source 6 on the right side plate 7 is shown in fig. 2, the 2 nd right side plate wave source 6 is positioned at 2a+3a/2 from the starting edge of the right side plate 7, the 3 rd right side plate wave source 6 is positioned at 4a+3a/2 from the starting edge of the right side plate 7, the 4 th right side plate wave source 6 is positioned at 6a+3a/2 from the starting edge of the right side plate 7, and the 5 th right side plate wave source 6 is positioned at 8a+3a/2 from the starting edge of the right side plate 7. The distance between the installation surface center O4 of each right side plate wave source 6 and the upper edge line of the right side plate 7 is a/4, and the included angle beta between the long side of the installation surface of each right side plate wave source 6 and the upper edge line of the right side plate 7 is 60 degrees.
The long side of the rectangle l=a/6.
Example 2
A method for reinforcing grinding and leaching efficiency of vanadium shale by utilizing microwaves. The method in this embodiment comprises the following steps:
step 1, crushing and screening the raw vanadium shale ore to obtain the raw vanadium shale ore with the grain diameter smaller than 1.5mm and the raw vanadium shale ore with the grain diameter of 1.5-10.0 mm.
And 2, carrying out microwave treatment by adopting a continuous microwave treatment device for enhancing the grinding and leaching efficiency of the vanadium shale, setting the transportation speed of the conveying belt 9, starting all wave sources in the continuous microwave treatment device, and starting the conveying belt 9.
Feeding raw ore of vanadium shale with the grain size of 1.5-10.0 mm from a feed inlet of the continuous microwave treatment device, wherein the feeding amount is 100kg/h; and obtaining the vanadium shale subjected to microwave treatment from a discharge port of the continuous microwave treatment device.
And 3, placing the vanadium shale subjected to microwave treatment into water for water quenching according to the mass ratio of the vanadium shale subjected to microwave treatment to water of 1:1.2, so as to obtain water quenching slurry.
Mixing the water quenching slurry with the raw vanadium shale ore with the grain diameter smaller than 1.5mm and the raw vanadium shale ore with the grain diameter smaller than 1.5mm according to the mass ratio of the raw vanadium shale ore with the grain diameter of 1.5-10.0 mm of 1:1.8, and grinding to obtain a ground ore product; the ground ore product enters a subsequent leaching process.
And 4, after all materials are processed, closing a switch of all wave sources, and closing a material conveying belt (9).
The chemical components of the vanadium shale are as follows: the content of C is 15wt%; v (V) 2 O 5 The content was 0.74% by weight.
The present embodiment is detected: the grindability (in terms of crushing rate) of the vanadium shale is 0.1678, which is improved by 236.3%; grinding for 12min; the energy consumption is 0.3333 kw.h/Kg (wherein, the energy consumption of microwave treatment is 0.1333 kw.h/Kg and the energy consumption of grinding is 0.2 kw.h/Kg), which is reduced by 47.37 percent; the leaching rate of the ground ore product is 83.32 percent, which is improved by 24.45 percent.
The embodiment relates to a continuous microwave treatment device for strengthening the grinding and leaching efficiency of vanadium shale. As shown in fig. 1, the continuous microwave treatment device is composed of a cavity enclosed by 4 rectangular flat plates, 4×n wave sources and a material conveying belt 9. The length of each rectangular flat plate is multiplied by the width=2na×a, each rectangular flat plate is uniformly provided with n wave sources respectively, and the 4n wave sources are the same; a material conveying belt 9 is horizontally arranged in the cavity, the height of the upper surface of the conveying belt 9 from the top of the cavity is 0.58a, and the width of the conveying belt 9 is 0.9a; the transport speed of the conveyor belt 9 is na/min.
In this embodiment: said n=10; the microwave power of the wave source is 1000W.
Mounting position of each wave source on the respective rectangular flat plate:
the mounting position of the roof wave source 8 on the roof 1 is as shown in fig. 2: the 1 st roof wave source 8 is located at a/2 from the start edge of the roof 1, the 2 nd roof wave source 8 is located at 2a+a/2 from the start edge of the roof 1, the 3 rd roof wave source 8 is located at 4a+a/2 from the start edge of the roof 1, … …, and so on, the 10 th roof wave source 8 is located at 18a+a/2 from the start edge of the roof 1. The center O1 of the mounting surface of each roof wave source 8 is a/4 from the upper edge line of the roof 1, and the long side of the mounting surface of each roof wave source 8 is perpendicular to the upper edge line of the roof 1.
The mounting position of the left-side plate wave source 2 on the left-side plate 3 is as shown in fig. 2: the 1 st left-side plate wave source 2 is located at a/2 from the starting edge of the left-side plate 3, the 2 nd left-side plate wave source 2 is located at 2a+a/2 from the starting edge of the left-side plate 3, the 3 rd left-side plate wave source 2 is located at 4a+a/2 from the starting edge of the left-side plate 3, … …, and so on, the 10 th left-side plate wave source 2 is located at 18a+a/2 from the starting edge of the left-side plate 3. The distance between the installation surface center O2 of each left side plate wave source 2 and the upper edge line of the left side plate 3 is a/4, and the included angle theta between the long edge of the installation surface of each left side plate wave source 2 and the upper edge line of the left side plate 3 is 0-45 degrees.
The installation position of the bottom plate wave source 4 on the bottom plate 5 is as shown in fig. 2: the 1 st floor wave source 4 is located at 3a/2 from the start edge of the floor 5, the 2 nd floor wave source 4 is located at 2a+3a/2 from the start edge of the floor 5, the 3 rd floor wave source 4 is located at 4a+3a/2 from the start edge of the floor 5, … …, and so on, the 10 th floor wave source 4 is located at 18a+3a/2 from the start edge of the floor 5. The center O3 of the installation surface of each floor wave source 4 is a/4 from the upper edge line of the floor 5, and the long side of the installation surface of each floor wave source 4 is parallel to the upper edge line of the floor 5.
The installation position of the right-side plate wave source 6 on the right-side plate 7 is as shown in fig. 2: the 1 st right-side plate wave source 6 is located at 3a/2 from the start edge of the right-side plate 7, the 2 nd right-side plate wave source 6 is located at 2a+3a/2 from the start edge of the right-side plate 7, the 3 rd right-side plate wave source 6 is located at 4a+3a/2 from the start edge of the right-side plate 7, … …, and so on, the 10 th right-side plate wave source 6 is located at 18a (n-1) +3a/2 from the start edge of the right-side plate 7. The distance between the installation surface center O4 of each right side plate wave source 6 and the upper edge line of the right side plate 7 is a/4, and the included angle beta between the long side of the installation surface of each right side plate wave source 6 and the upper edge line of the right side plate 7 is 45 degrees.
The long side of the rectangle l=a/4.
Example 3
A method for reinforcing grinding and leaching efficiency of vanadium shale by utilizing microwaves. The method in this embodiment comprises the following steps:
step 1, crushing and screening the raw vanadium shale ore to obtain the raw vanadium shale ore with the grain diameter smaller than 1.5mm and the raw vanadium shale ore with the grain diameter of 1.5-10.0 mm.
And 2, carrying out microwave treatment by adopting a continuous microwave treatment device for enhancing the grinding and leaching efficiency of the vanadium shale, setting the transportation speed of the conveying belt 9, starting all wave sources in the continuous microwave treatment device, and starting the conveying belt 9.
Feeding raw ore of vanadium shale with the grain size of 1.5-10.0 mm from a feed inlet of the continuous microwave treatment device, wherein the feeding amount is 150kg/h; and obtaining the vanadium shale subjected to microwave treatment from a discharge port of the continuous microwave treatment device.
And 3, placing the vanadium shale subjected to microwave treatment into water for water quenching according to the mass ratio of the vanadium shale subjected to microwave treatment to water of 1:3, so as to obtain water quenching slurry.
Mixing the water quenching slurry with the vanadium shale raw ore with the grain diameter smaller than 1.5mm and the vanadium shale raw ore with the grain diameter smaller than 1.5mm according to the mass ratio of the vanadium shale raw ore with the grain diameter of 1.5-10.0 mm of 1:2, and grinding to obtain a ground ore product; the ground ore product enters a subsequent leaching process.
And 4, after all materials are processed, closing a switch of all wave sources, and closing a material conveying belt (9).
The chemical components of the vanadium shale are as follows: the content of C is 25wt%; v (V) 2 O 5 The content was 1.25wt%.
The present embodiment is detected: the grindability (calculated by the crushing rate) of the vanadium shale is 0.1577, which is improved by 216%; grinding time is 16.5min; the energy consumption is 0.3665 kw.h/Kg (wherein, the energy consumption of microwave treatment is 0.0083 kw.h/Kg and the energy consumption of grinding is 0.3999 kw.h/Kg), which is reduced by 40.78%; the leaching rate of the ground ore product is 76.19 percent, and the leaching rate is improved by 18.39 percent.
The embodiment relates to a continuous microwave treatment device for strengthening the grinding and leaching efficiency of vanadium shale. As shown in fig. 1, the continuous microwave treatment device is composed of a cavity enclosed by 4 rectangular flat plates, 4×n wave sources and a material conveying belt 9. The length of each rectangular flat plate is multiplied by the width=2na×a, each rectangular flat plate is uniformly provided with n wave sources respectively, and the 4n wave sources are the same; a material conveying belt 9 is horizontally arranged in the cavity, the height of the upper surface of the conveying belt 9 from the top of the cavity is 0.52a, and the width of the conveying belt 9 is 0.95a; the transport speed of the conveyor belt 9 was 2na/min.
In this embodiment: the n=3.
The microwave power of the wave source is 1500W.
Mounting position of each wave source on the respective rectangular flat plate:
the mounting position of the roof wave source 8 on the roof 1 is as shown in fig. 2: the 1 st roof wave source 8 is located at a/2 from the start edge of the roof 1, the 2 nd roof wave source 8 is located at 2a+a/2 from the start edge of the roof 1, and the 3 rd roof wave source 8 is located at 4a/2 from the start edge of the roof 1. The center O1 of the mounting surface of each roof wave source 8 is a/4 from the upper edge line of the roof 1, and the long side of the mounting surface of each roof wave source 8 is perpendicular to the upper edge line of the roof 1.
The mounting position of the left-side plate wave source 2 on the left-side plate 3 is as shown in fig. 2: the 1 st left-side plate wave source 2 is positioned at a/2 from the starting edge of the left-side plate 3, the 2 nd left-side plate wave source 2 is positioned at 2a+a/2 from the starting edge of the left-side plate 3, and the 3 rd left-side plate wave source 2 is positioned at 4a+a/2 from the starting edge of the left-side plate 3. The distance between the center O2 of the installation surface of each left side plate wave source 2 and the upper edge line of the left side plate 3 is a/4, and the included angle theta between the long edge of the installation surface of each left side plate wave source 2 and the upper edge line of the left side plate 3 is 0 degree.
The installation position of the bottom plate wave source 4 on the bottom plate 5 is as shown in fig. 2: the 1 st floor wave source 4 is located at 3a/2 from the start edge of the floor 5, the 2 nd floor wave source 4 is located at 2a+3a/2 from the start edge of the floor 5, and the 3 rd floor wave source 4 is located at 4a+3a/2 from the start edge of the floor 5. The center O3 of the installation surface of each floor wave source 4 is a/4 from the upper edge line of the floor 5, and the long side of the installation surface of each floor wave source 4 is parallel to the upper edge line of the floor 5.
The installation position of the right-side plate wave source 6 on the right-side plate 7 is as shown in fig. 2: the 1 st right-side plate wave source 6 is located at 3a/2 from the start edge of the right-side plate 7, the 2 nd right-side plate wave source 6 is located at 2a+3a/2 from the start edge of the right-side plate 7, and the 3 rd right-side plate wave source 6 is located at 4a4+3a/2 from the start edge of the right-side plate 7. The distance between the installation surface center O4 of each right side plate wave source 6 and the upper edge line of the right side plate 7 is a/4, and the included angle beta between the long side of the installation surface of each right side plate wave source 6 and the upper edge line of the right side plate 7 is 90 degrees.
The long side of the rectangle l=a/3.
Compared with the prior art, the specific implementation method has the following positive effects:
1. the specific implementation mode is based on simulation and experimental verification of an electric-magnetic-thermal-stress composite physical field in a cavity of the microwave treatment device, and the continuous microwave treatment device (hereinafter referred to as a continuous microwave treatment device) for strengthening the grinding and leaching efficiency of the vanadium shale is adopted for microwave treatment. The cavity and the wave sources of the continuous microwave treatment device are subjected to layout optimization, n wave sources corresponding to the wave sources are respectively and regularly arranged at different positions and different angles of the outer walls of the 4 flat plates of the cavity, so that the optimal distribution of the composite physical field in the cavity is realized, the induction strengthening effect of microwaves on the heterogeneous dissociation of the vanadium shale is fully exerted, and the grindability of the vanadium shale is greatly improved; in addition, the continuous treatment mode of the multi-wave source can realize that the vanadium shale is subjected to continuous multi-dimensional irradiation in the running process in the cavity, so that the treatment effect is improved and the treatment period is shortened.
According to the method, the high-efficiency pretreatment of the vanadium shale can be realized within 1-2 min and below the combustion temperature of carbon, so that the grindability (based on the crushing rate) of the vanadium shale is improved by more than 200%, and meanwhile, the total ore grinding energy consumption (including the microwave pretreatment energy consumption and the ore grinding energy consumption of a microwave pretreatment product) is reduced by more than 40%, and the method is short in treatment period, good in treatment effect and low in energy consumption.
2. The specific embodiment aims at the special design of pyrite and carbonaceous wave absorbing substances of vanadium shale, the embedding characteristics of fine particles interweaving with mica and feldspar non-wave absorbing silicate minerals and the evolution rule of dielectric characteristics of vanadium-containing minerals in the treatment process, and on the basis of simulation of a composite physical field, the microwave cavity of a continuous microwave treatment device and n stages (the first wave source of each flat plate is called a first stage, the second wave source of each flat plate is called a second stage, … …, and so on, the n wave source of each flat plate is called an n-th stage) wave source and a continuous transmission device are adopted, in the pretreatment process, the multistage microwave qualitative dynamic effect is continuously excited, so that the treated vanadium shale is continuously and alternately subjected to the action of n electro-magnetic-thermal-stress composite physical fields in the cavity, the dehydroxylation reaction of the vanadium-containing mica Al-O (OH) body is greatly enhanced by the distribution form of the composite physical field, the reactivity of vanadium in the acid leaching process is improved, the leaching rate of the vanadium is improved by more than 15% under the same condition, and the leaching rate of the vanadium shale is remarkably enhanced.
3. The specific implementation mode combines a multistage continuous distribution mechanism of an n-level wave source of a continuous microwave processing device with a material conveying belt (9), and adjusts the irradiation power, irradiation time and conveying speed of the material conveying belt (9) of each level wave source in the continuous microwave process of the vanadium shale to realize optimized matching; on one hand, the operation steps of the microwave treatment of the vanadium shale are simplified, and the batch continuous treatment of the vanadium shale can be realized under simple operation; on the other hand, as the treated vanadium shale continuously passes through n electric-magnetic-thermal-stress composite physical fields, the continuous and alternate radiant energy can greatly reduce the radiant non-uniformity in a plurality of physical fields in the cavity of the microwave device, and the high grindability and leaching efficiency of the vanadium shale can be obtained in 1-2 min, and the production efficiency is high.
4. In the connection microwave treatment process of the vanadium shale, the continuous microwave treatment device can be arranged between the vanadium shale crushing process and the ore grinding process due to the short treatment period, low overall temperature and no carbon emission; the method can realize the organic combination among the grinding process, the microwave treatment process and the ore grinding process through simple series combination, and is suitable for a vanadium extraction system of the vanadium shale by the all-wet method.
Therefore, the method has the characteristics of short treatment time, low energy consumption, no carbon emission, good grindability and leaching rate strengthening effect of the vanadium shale, simple operation and high treatment efficiency, and is suitable for a microwave strengthening method of a vanadium extraction system of the vanadium shale by an all-wet method.
Claims (4)
1. A method for reinforcing grinding and leaching efficiency of vanadium shale by utilizing microwaves is characterized by comprising the following specific steps:
step 1, crushing and screening vanadium shale raw ores to obtain vanadium shale raw ores with the particle size smaller than 1.5mm and vanadium shale raw ores with the particle size of 1.5-10.0 mm;
step 2, carrying out microwave treatment by adopting a continuous microwave treatment device for enhancing the grinding and leaching efficiency of the vanadium shale, setting the transportation speed of a transmission belt (9), starting all wave sources in the continuous microwave treatment device, and starting the transmission belt (9);
feeding raw ore of vanadium shale with the grain size of 1.5-10.0 mm from a feed inlet of the continuous microwave treatment device, wherein the feeding amount is 60-150 kg/h; obtaining vanadium shale subjected to microwave treatment from a discharge port of the continuous microwave treatment device;
step 3, placing the vanadium shale subjected to microwave treatment into water for water quenching according to the mass ratio of the vanadium shale subjected to microwave treatment to water of 1:1-3 to obtain water quenching slurry;
mixing the water quenching slurry with the raw vanadium shale ore with the grain diameter smaller than 1.5mm and grinding according to the mass ratio of the raw vanadium shale ore with the grain diameter smaller than 1.5mm to the raw vanadium shale ore with the grain diameter of 1.5-10.0 mm of 1:1.5-2, so as to obtain a grinding product; the ground ore product enters a subsequent leaching process;
step 4, after all materials are processed, closing a switch of all wave sources, and closing a material conveying belt (9);
the structure of the continuous microwave treatment device for strengthening the grinding and leaching efficiency of the vanadium shale is as follows: the continuous microwave treatment device consists of a cavity body formed by 4 rectangular flat plates, 4n wave sources and a material conveying belt (9); the length multiplied by the width=2na×a of the rectangular flat plates, each rectangular flat plate is uniformly provided with n wave sources respectively, 4n wave sources are the same, and n is a natural number of 2-10; a material conveying belt (9) is horizontally arranged in the cavity, the height of the upper surface of the conveying belt (9) from the top of the cavity is 0.52-0.58 a, and the width of the conveying belt (9) is 0.9-0.95 a;
the four rectangular flat plates are respectively a top plate (1), a left side plate (3), a bottom plate (5) and a right side plate (7), and the top plate (1), the left side plate (3), the bottom plate (5) and the right side plate (7) are respectively provided with a top plate wave source (8), a left side plate wave source (2), a bottom plate wave source (4) and a right side plate wave source (6) correspondingly in sequence; each wave source consists of 1 magnetron and 1 waveguide, and each wave source is rectangular on the mounting surface of the rectangular flat plate;
mounting position of each wave source on the respective rectangular flat plate:
for simplicity of description, it is assumed that the cavity is unfolded to a plane by separating the cavity from the intersection of the top plate (1) and the right side plate (7); and the following steps: the inlet end of the material is the initial edge of each rectangular flat plate, the parting line of the top plate (1) is the upper edge of the cavity expansion surface, namely, the first horizontal line of the cavity expansion surface is the upper edge of the top plate (1), the second horizontal line of the cavity expansion surface is the upper edge of the left side plate (3), the third horizontal line of the cavity expansion surface is the upper edge of the bottom plate (5), and the fourth horizontal line of the cavity expansion surface is the upper edge of the right side plate (7);
the installation position of the top plate wave source (8) on the top plate (1): the 1 st roof wave source (8) is positioned at a/2 from the starting edge of the roof (1), the 2 nd roof wave source (8) is positioned at 2a (2-1) +a/2 from the starting edge of the roof (1), the 3 rd roof wave source (8) is positioned at 2a (3-1) +a/2 from the starting edge of the roof (1), … …, and so on, the nth roof wave source (8) is positioned at 2a (n-1) +a/2 from the starting edge of the roof (1); the distance between the mounting surface center O1 of each top plate wave source (8) and the upper edge line of the top plate (1) is a/4, and the long side of the mounting surface of each top plate wave source (8) is perpendicular to the upper edge line of the top plate (1);
the left side plate wave source (2) is arranged at the mounting position of the left side plate (3): the 1 st left side plate wave source (2) is positioned at a/2 from the starting edge of the left side plate (3), the 2 nd left side plate wave source (2) is positioned at 2a (2-1) +a/2 from the starting edge of the left side plate (3), the 3 rd left side plate wave source (2) is positioned at 2a (3-1) +a/2 from the starting edge of the left side plate (3), … …, and so on, the nth left side plate wave source (2) is positioned at 2a (n-1) +a/2 from the starting edge of the left side plate (3); the distance between the installation surface center O2 of each left side plate wave source (2) and the upper edge line of the left side plate (3) is a/4, and the included angle theta between the long side of the installation surface of each left side plate wave source (2) and the upper edge line of the left side plate (3) is 0-45 degrees;
the installation position of the bottom plate wave source (4) on the bottom plate (5): the 1 st floor wave source (4) is positioned at 3a/2 from the starting edge of the floor (5), the 2 nd floor wave source (4) is positioned at 2a (2-1) +3a/2 from the starting edge of the floor (5), the 3 rd floor wave source (4) is positioned at 2a (3-1) +3a/2 from the starting edge of the floor (5), … …, and so on, the nth floor wave source (4) is positioned at 2a (n-1) +3a/2 from the starting edge of the floor (5); the distance between the mounting surface center O3 of each bottom plate wave source (4) and the upper edge line of the bottom plate (5) is a/4, and the long side of the mounting surface of each bottom plate wave source (4) is parallel to the upper edge line of the bottom plate (5);
the right side plate wave source (6) is arranged at the installation position of the right side plate (7): the 1 st right side plate wave source (6) is positioned at 3a/2 from the starting edge of the right side plate (7), the 2 nd right side plate wave source (6) is positioned at 2a (2-1) +3a/2 from the starting edge of the right side plate (7), the 3 rd right side plate wave source (6) is positioned at 2a (3-1) +3a/2 from the starting edge of the right side plate (7), … …, and so on, the nth right side plate wave source (6) is positioned at 2a (n-1) +3a/2 from the starting edge of the right side plate (7); the distance between the installation surface center O4 of each right side plate wave source (6) and the upper edge line of the right side plate (7) is a/4, and the included angle between the long side of the installation surface of each right side plate wave source (6) and the upper edge line of the right side plate (7) is 90-theta.
2. The method for reinforcing the grinding and leaching efficiency of vanadium shale by utilizing microwaves according to claim 1, wherein the chemical components of the vanadium shale are as follows: the content of C is 4-25wt%; v (V) 2 O 5 The content is more than or equal to 0.45 weight percent.
3. The method for reinforcing the grinding and leaching efficiency of the vanadium shale by utilizing microwaves according to claim 1, wherein the microwave power of the wave source is 500-1500W.
4. The method for reinforcing the grinding and leaching efficiency of the vanadium shale by utilizing microwaves according to claim 1, wherein the long side l of the rectangle is a/6-a/3.
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