CN212894913U - Continuous production device for extracting rare earth sulfate from electrolytic molten salt slag - Google Patents
Continuous production device for extracting rare earth sulfate from electrolytic molten salt slag Download PDFInfo
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Abstract
The utility model discloses an electrolysis molten salt sediment draws sulphuric acid tombarthite serialization apparatus for producing, this apparatus for producing includes the crocus unit, the compounding unit, tombarthite extraction element and filtering separation device, the crocus unit includes crocus device and first feed bin, the compounding unit includes the blendor and the flow control valve who is connected with the blendor, first batcher and second batcher, the tombarthite extraction element is including the acidizing kiln that connects gradually, cold sediment ware and reation kettle, the acidizing kiln is connected with second batcher, reation kettle has a plurality ofly, the export of cold sediment ware and a plurality of reation kettle's access connection, filtering separation device's import and a plurality of reation kettle's exit linkage. The utility model provides a production device can realize the serialization production of tombarthite, greatly reduced artifical participation link, and then reduced workman's intensity of labour and enterprise personnel selection cost.
Description
Technical Field
The utility model relates to a continuous production device for extracting rare earth sulfate from electrolysis molten salt slag.
Background
The rare earth electrolytic molten salt slag is waste slag (hereinafter referred to as electrolytic molten salt slag) containing rare earth elements, which is produced in a rare earth fluoride electrolytic system and mainly comes from: 1. pulverizing the rare earth dust carried by graphite; 2. discharging the metal, and replacing the molten salt carried by the anode; 3. adsorbing the enriched rare earth molten salt on the furnace lining. According to incomplete statistics, the rare earth elements contained in the waste residues account for more than 5 percent of the whole electrolytic production system. As is well known, rare earth resources are an important strategic resource, and if the molten salt waste residues can be effectively recycled, the loss rate of the rare earth industry can be obviously reduced, the production cost can be reduced, and the economic benefit can be improved.
Because the enterprises engaged in recycling the rare earth from the electrolytic molten salt slag in China are small in quantity and small in scale, taking the sulfuric acid roasting leaching method for recycling the rare earth as an example, a plurality of procedures need manual participation for carrying out discontinuous production, the labor intensity of workers and the labor cost of the enterprises are greatly improved, and meanwhile, the discontinuous production also causes fluctuation and instability of the process, and is not beneficial to the stability of the product quality.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent.
Therefore, the embodiment of the utility model provides an electrolysis molten salt sediment draws sulphuric acid tombarthite serialization apparatus for producing.
The continuous production device for extracting rare earth sulfate from electrolytic molten salt slag comprises a grinding unit, a mixing unit, a rare earth extraction unit and a filtering and separating device, wherein the grinding unit comprises a grinding device and a first bin which are connected in sequence; the mixing unit comprises a mixer, a flow control valve, a first quantitative feeder and a second quantitative feeder, wherein an inlet of the first quantitative feeder is connected with an outlet of the first bin, an electrolytic molten salt slag powder inlet of the mixer is connected with an outlet of the first quantitative feeder, a sulfuric acid inlet of the mixer is connected with the flow control valve, and a mixing outlet of the mixer is connected with an inlet of the second quantitative feeder; the rare earth extraction unit comprises an acidification kiln, a slag cooler and a plurality of reaction kettles which are connected in sequence, wherein the inlet of the acidification kiln is connected with the outlet of the second quantitative feeder, the number of the reaction kettles is multiple, and the outlet of the slag cooler is connected with the inlets of the reaction kettles; and the inlet of the filtering and separating device is connected with the outlets of the reaction kettles.
The continuous production device for extracting the rare earth sulfate from the electrolytic molten salt slag has the advantages of stable process, stable reaction quality, low labor intensity and low labor cost.
In some embodiments, the continuous production device for extracting rare earth sulfate from the electrolytic molten salt slag further comprises an electrolytic molten salt slag supply unit, wherein the electrolytic molten salt slag supply unit comprises an automatic bale breaker, a bucket elevator and a second bin, an outlet of the automatic bale breaker is matched with a hopper at the lower end of the bucket elevator, a hopper at the upper end of the bucket elevator is matched with an inlet of the second bin, and an outlet of the second bin is connected with an inlet of the milling device.
In some embodiments, the electrolytic molten salt slag supply unit further comprises an electric single-beam crane for hoisting the bagged electrolytic molten salt slag to the automatic bale breaker.
In some embodiments, the automatic bale breaker comprises a conveyor belt and a bale breaker mechanism, wherein the lower end of the conveyor belt is matched with the electric single-beam crane, the upper end of the conveyor belt is connected with the inlet of the bale breaker mechanism, and the outlet of the bale breaker mechanism is matched with the hopper at the lower end of the bucket elevator.
In some embodiments, the milling device comprises a screw conveyor, an automatic mill and a bin pump which are connected in sequence, the screw conveyor is arranged below the second bin, an inlet of the screw conveyor is connected with an outlet of the second bin through a pipeline, and an outlet of the bin pump is connected with an inlet of the first bin through a pipeline.
In some embodiments, the first bin is provided with the vent, and a dust collecting cloth bag is connected to the first bin at the vent.
In some embodiments, the first doser comprises a double-deck metering screw scale, the first silo being disposed above the double-deck metering screw scale.
In some embodiments, the double-layer metering screw scale comprises a first metering screw and a second metering screw, wherein an inlet of the first metering screw is connected with an outlet of the first storage bin, an outlet of the first metering screw is connected with an inlet of the second metering screw, and an outlet of the second metering screw is connected with an electrolytic molten salt slag powder inlet of the mixer.
In some embodiments, the second constant feeder is a screw feeder.
In some embodiments, the device further comprises a belt conveyor and a liquid storage tank, the filtering and separating device comprises a filter press, a leaching residue outlet of the filter press is connected with the belt conveyor, and a filtrate outlet of the filter press is connected with the liquid storage tank.
Drawings
Fig. 1 shows a schematic view of a continuous production device for extracting rare earth sulfate from electrolytic molten salt slag according to an embodiment of the utility model.
FIG. 2 is a material flow chart of extracting rare earth sulfate from electrolytic molten salt slag by a sulfuric acid roasting leaching method.
Reference numerals:
a continuous production device 100 for extracting rare earth sulfate from electrolytic molten salt slag,
the device comprises a grinding unit 1, a screw conveyor 101, an automatic mill 102, a bin pump 103, a first bin 104, a mixing unit 2, a mixer 201, a double-layer metering screw scale 202, a first metering screw 2021, a second metering screw 2022, a screw feeder 203, an electrolysis molten salt slag supply unit 3, an electric single-beam crane 301, an automatic bale breaker 302, a conveyor belt 3021, a bale breaker mechanism 3022, a bucket elevator 303, a second bin 304, a rare earth extraction unit 4, an acidification kiln 401, a slag cooler 402, a reaction kettle 403, a filtering and separating device 5, a filter press 5a, a belt conveyor 6 and a liquid storage tank 7.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The continuous production device 100 for extracting rare earth sulfate from electrolytic molten salt slag according to the embodiment of the present invention is described below with reference to fig. 1 and 2.
As shown in fig. 1, according to the utility model discloses electrolysis molten salt sediment draws sulphuric acid tombarthite serialization apparatus for producing 100 includes crocus unit 1, compounding unit 2, tombarthite extraction unit 4 and filtering separation device 5, and crocus unit 1 is including the milling equipment and the first feed bin 104 that connect gradually. The mixing unit 2 comprises a mixer 201, a flow control valve, a first quantitative feeder and a second quantitative feeder, the inlet of the first quantitative feeder is connected with the outlet of the first storage bin 104, the electrolytic molten salt slag powder inlet of the mixer 201 is connected with the outlet of the first quantitative feeder, the sulfuric acid inlet of the mixer 201 is connected with the flow control valve, and the mixing outlet of the mixer 201 is connected with the inlet of the second quantitative feeder. The rare earth extraction unit 4 comprises an acidification kiln 401, a slag cooler 402 and a reaction kettle 403 which are connected in sequence, wherein an inlet of the acidification kiln 401 is connected with an outlet of the second quantitative feeder, a plurality of reaction kettles 403 are provided, and an outlet of the slag cooler 402 is connected with inlets of the reaction kettles 403. The inlet of the filtering and separating device 5 is connected with the outlets of the plurality of reaction kettles 403.
Specifically, the milling device is used for grinding the electrolysis molten salt slag into powder with a set granularity, and conveying the ground electrolysis molten salt slag powder to the first storage bin 104. The first bunker 104 conveys the electrolytic molten salt slag powder to the first quantitative feeder. The first quantitative feeder continuously inputs the electrolytic molten salt slag powder into the mixer 201 from the electrolytic molten salt slag powder inlet at a first preset flow rate. The sulfuric acid pipe continuously inputs sulfuric acid into the mixer 201 through the sulfuric acid inlet at a second preset flow rate under the control of the flow control valve.
The electrolytic molten salt slag powder and the sulfuric acid with the set proportion are mixed in the mixer 201 to form a mixed material, and the formed mixed material is continuously conveyed to the second constant feeder from a mixed material outlet of the mixer 201. The second constant feeder continuously conveys the mixed material to an acidification kiln 401 to carry out an acidification roasting process. The reactant formed by the acid roasting process is continuously transported to the slag cooler 402 for cooling. The cooled reactant is sequentially sent to a plurality of reaction kettles 403 for leaching reaction to generate ore pulp.
That is, the cooled reactant is first transferred to one reaction vessel 403, and after the reaction vessel 403 is completely filled, the cooled reactant is transferred to another reaction vessel 403. Therefore, the slag cooler 402 can continuously output cooled reactants, so that the continuous production device 100 for extracting rare earth sulfate from the electrolytic molten salt slag can continuously operate to continuously produce filtrate (rare earth sulfate solution). The ore pulp is conveyed to the filtering and separating device 5 from the outlet of the reaction kettle 403, and the filtering and separating device 5 filters and separates the ore pulp to form leached slag and filtrate.
According to the utility model discloses electrolysis molten salt sediment draws sulphuric acid tombarthite serialization apparatus for producing 100 is through the exit linkage who makes the import of first batcher and first feed bin 104 to can make in the electrolysis molten salt sediment powder in the first feed bin 104 carries blendor 201 through first batcher continuously, automatically, so that make electrolysis molten salt sediment powder and sulphuric acid mix. By connecting the inlet of the acidification kiln 401 with the outlet of the second quantitative feeder, the mixed material can be continuously and automatically conveyed into the acidification kiln 401 and the slag cooler 402 in sequence for acidification roasting and cooling treatment.
According to the utility model discloses electrolysis molten salt sediment draws sulphuric acid tombarthite serialization apparatus for producing 100 is through setting up a plurality of reation kettle 403 to not only can make cold sediment ware 402 can export the reactant after the cooling in succession, can continuously carry the ore pulp to filtering separation device 5 in batches moreover.
The cooled reactant can be continuously output for sequential delivery to each of the reaction vessels 403. The inlet of the filtering and separating device 5 is connected with the outlets of the reaction kettles 403, and each reaction kettle 403 can convey the internal ore pulp to the filtering and separating device 5, so that the internal space of the reaction kettle 403 is emptied, and the cooled reactant can be continuously discharged by the slag cooler 402.
Therefore, the utility model discloses electrolysis molten salt sediment draws sulphuric acid tombarthite serialization apparatus for producing 100 can continuously, automatically output the reactant after the cooling to not only ensure that the technology is steady, not undulant, guarantee the stability of the quality of the reactant after the cooling, whole production process does not need artifical the participation basically moreover, has reduced workman's intensity of labour and the personnel selection cost of enterprise.
Therefore, the continuous production device 100 for extracting rare earth sulfate from electrolytic molten salt slag provided by the embodiment of the utility model has the advantages of stable process, stable reaction quality, low labor intensity, low labor cost and the like.
As shown in fig. 1, the continuous production apparatus 100 for extracting rare earth sulfate from electrolytic molten salt slag comprises an electrolytic molten salt slag supply unit 3, a grinding unit 1, a mixing unit 2, a rare earth extraction unit 4, a filter press 5a, a belt conveyor 6 and a liquid storage tank 7.
The electrolytic molten salt slag supply unit 3 comprises an electric single-beam crane 301, an automatic bale breaker 302, a bucket elevator 303 and a second bin 304 which are connected in sequence, wherein the automatic bale breaker 302 comprises a conveyor belt 3021 and a bale breaker 3022. The electric single-beam crane 301 is matched with the lower end of the conveyor belt 3021, the upper end of the conveyor belt 3021 is connected with the inlet of the bale breaker 3022, the outlet of the bale breaker 3022 is matched with the hopper at the lower end of the bucket elevator 303, and the hopper at the upper end of the bucket elevator 303 is matched with the inlet of the second storage bin 304.
As shown in fig. 1, the electric single-beam crane 301 is disposed above the storage area for the bagged electrolytic molten salt slag, and the lifting mechanism of the electric single-beam crane 301 can lift the bagged electrolytic molten salt slag in the storage area and convey the bagged electrolytic molten salt slag to the lower end of the conveyor belt 3021.
The electric single-beam crane 301 is arranged to connect the lower end of the conveyor belt 3021 and the storage area of the bagged electrolytic molten salt slag, so that the bagged electrolytic molten salt slag does not need to be manually moved to the lower end of the conveyor belt 3021, and the labor intensity of workers is reduced.
As shown in fig. 1, the conveyor belt 3021 is disposed obliquely, and the first end of the conveyor belt 3021 is a lower end and the second end is an upper end. The inlet of the unpacking mechanism 3022 is arranged upward and is connected to the upper end of the conveyor belt 3021, and the outlet of the unpacking mechanism 3022 is arranged downward and is engaged with the hopper of the bucket elevator 303 located at the lower end. The electric single beam crane 301 hoists the bagged electrolytic molten salt slag to the lower end of the conveyor belt 3021, and the conveyor belt 3021 operates to convey the bagged electrolytic molten salt slag obliquely upward toward the upper end of the conveyor belt 3021. In this way, the electric single-beam crane 301 can continuously hoist the bagged electrolytic molten salt slag to the lower end of the conveyor belt 3021, and the conveyor belt 3021 can also continuously convey the bagged electrolytic molten salt slag to the upper end of the conveyor belt 3021 and finally to the upper end inlet of the unpacking mechanism 3022. Through setting up conveyer belt 3021, when unpacking operation is carried out to unpacking mechanism 3022, electric single beam crane 301 can continue to hoist in bags to conveyer belt 3021, and conveyer belt 3021 plays the function of temporary storage bagged electrolysis molten salt sediment, is convenient for in time carry bagged electrolysis molten salt sediment to unpacking mechanism 3022. Through setting up bale breaking mechanism 3022, no longer need to accomplish the bale breaking through the manual work, the bale breaking efficiency is higher.
As shown in fig. 1, the outlet of the unpacking mechanism 3022 is engaged with the hopper of the bucket elevator 303 at the lower end, and the hopper of the bucket elevator 303 at the upper end is engaged with the inlet of the second bin 304. The bagged electrolytic molten salt slag enters from an inlet of the unpacking mechanism 3022, and the unpacking mechanism 3022 unpacks the bagged electrolytic molten salt slag and conveys the unpacked electrolytic molten salt slag to a hopper at the lower end of the bucket elevator 303. Then the hopper (the hopper containing the electrolytic molten salt slag) at the lower end of the bucket elevator 303 moves to the upper end of the bucket elevator 303 and is poured into the second bin 304. Through setting up bucket elevator 303, carry the second feed bin 304 of eminence to electrolysis molten salt sediment automatic under the confined environment in, no longer need artifical material loading, also effectively avoid electrolysis molten salt sediment dust excessive in transportation process to appear, the feature of environmental protection is higher.
The milling unit 1 includes a screw conveyor 101, an automatic mill 102, a bin pump 103, and a first bin 104, which are connected in this order. The outlet at the lower end of the second storage bin 304 is connected with the inlet of the screw conveyer 101, the outlet of the screw conveyer 101 is connected with the inlet of the automatic mill 102, the outlet of the automatic mill 102 is connected with the inlet of the bin pump 103, and the outlet of the bin pump 103 is connected with the inlet at the upper end of the first storage bin 104 through a pipeline.
As shown in fig. 1, the screw conveyor 101 is horizontally disposed, and an inlet of the screw conveyor 101 is located below the second bin 304 and communicates with an outlet of the second bin 304 through a pipe. The outlet of the screw conveyor 101 is positioned above the inlet of the automatic grinding machine 102 and is communicated with the inlet of the automatic grinding machine 102 through a pipeline, and the screw conveyor 101 is used for conveying the electrolytic molten salt slag into the automatic grinding machine 102 in a closed environment. The automatic grinding machine 102 carries out full-automatic circulating grinding on the electrolytic molten salt slag, a fan connected with an inner cavity of the automatic grinding machine 102 is arranged on the outer side of the automatic grinding machine 102, and the fan is used for manufacturing a negative pressure environment for the inner cavity of the automatic grinding machine 102 so as to effectively prevent dust from overflowing. The electrolytic molten salt slag powder ground into qualified particle size falls into the bin pump 103 from the inlet of the bin pump 103 through the blanking pipe of the automatic grinding machine 102, and then is conveyed into the first storage bin 104 through the pipeline under the driving of the bin pump 103. Therefore, in the whole milling process, the electrolytic molten salt slag and the electrolytic molten salt slag powder are always in a closed environment, the overflow of dust is reduced to the maximum extent, and the environmental protection performance is further improved.
As shown in fig. 1, the first storage bin 104 is provided with a vent, the vent is arranged at the top of the first storage bin 104, and the first storage bin 104 is provided with a dust collecting cloth bag at the vent. The ventilation opening prevents the cabin pump 103 from being incapable of continuously conveying the electrolytic molten salt slag powder with qualified granularity into the first storage bin 104 due to the formation of a closed environment inside the first storage bin 104. Therefore, by arranging the dust collecting cloth bag used for sealing the vent of the first storage bin 104, the electrolytic molten salt slag powder in the first storage bin 104 is prevented from overflowing, and the environmental protection performance is further improved. Meanwhile, the air permeability of the dust collection cloth bag also ensures that the pipeline continuously conveys the electrolytic molten salt slag powder to the first storage bin 104.
The mixing unit 2 comprises a double-layer metering screw scale 202, a mixer 201 and a screw feeder 203 which are connected in sequence, the outlet of the lower end of the first bin 104 is connected with the inlet of the double-layer metering screw scale 202, the outlet of the double-layer metering screw scale 202 is connected with the electrolytic molten salt slag powder inlet of the mixer 201, and the mixing outlet of the mixer 201 is connected with the inlet of the screw feeder 203.
The outlet at the bottom of the first storage bin 104 is connected with the inlet of a double-layer metering screw scale 202, and the outlet of the double-layer metering screw scale 202 is connected with the electrolytic molten salt slag powder inlet of the mixer 201. Be equipped with weighing sensor and speedtransmitter on the double-deck measurement spiral balance 202, cooperation inverter motor and supporting control system can realize the accurate measurement to electrolysis fused salt slag powder and to the accurate feed of blendor 201. Through setting up double-deck measurement spiral balance 202, electrolysis fused salt slag powder is in the encapsulated situation constantly at measurement and feed in-process, avoids the overflow of electrolysis fused salt slag powder in this process, and the feature of environmental protection is better.
In some embodiments, the double-layer metering screw scale 202 comprises a first metering screw 2021 and a second metering screw 2022, an inlet of the first metering screw 2021 is connected to an outlet of the first silo 104, an outlet of the first metering screw 2021 is connected to an inlet of the second metering screw 2022, and an outlet of the second metering screw 2022 is connected to an electrolytic molten salt slag powder inlet of the mixer 201.
As shown in fig. 1, the first metering screw 2021 is located above the second metering screw 2022, the electrolytic molten salt slag powder in the first storage bin 104 firstly enters the first metering screw 2021, and the first metering screw 2021 completes the steady flow and transportation of the electrolytic molten salt slag powder so as to stably transport the electrolytic molten salt slag powder to the second metering screw 2022. The weighing sensor and the speed sensor are arranged on the second metering screw 2022, and the electrolytic molten salt slag powder is metered and conveyed by the second metering screw 2022 to accurately feed the material to the mixer 201.
It is worth mentioning that the mixer 201 in this embodiment completes the mixing of the molten salt slag powder and the sulfuric acid by the double-layer spiral coulter. Specifically, electrolysis fused salt slag powder import and sulphuric acid import all set up in the first end of blendor 201, and the compounding export sets up in the second end of blendor 201, and first end and second end are connected to double-deck spiral coulter. After electrolysis fused salt slag powder and sulphuric acid get into blendor 201, double-deck spiral coulter rotates in order to mix electrolysis fused salt slag powder and sulphuric acid, and simultaneously, the helical structure of double-deck spiral coulter also will mix the compounding of accomplishing and hold slowly to carry to the second to finally continuously flow into second constant feeder by the compounding export.
In some embodiments, the second constant feeder is a screw feeder 203. As shown in fig. 1, the screw feeder 203 is a single-tube single-layer type metering screw scale, which is disposed below the mixer 201 and is used for receiving the mixed material after mixing and accurately delivering a set amount of the mixed material to the acidification kiln 401.
The rare earth extraction unit 4 comprises an acidification kiln 401, a slag cooler 402 and a plurality of reaction kettles 403, wherein an outlet of the screw feeder 203 is connected with an inlet of the acidification kiln 401, an outlet of the acidification kiln 401 is connected with an inlet of the slag cooler 402, and an outlet of the slag cooler 402 is connected with inlets of the reaction kettles 403.
The second constant feeder continuously conveys the mixed material to an acidification kiln 401 to carry out an acidification roasting process. The reactant formed by the acid roasting process is continuously transported to the slag cooler 402 for cooling. Taking five reaction kettles 403 as an example, the cooled reactants are sequentially fed into five reaction kettles 403, when the fifth reaction kettle 403 is fed, the reactant in the first reaction kettle 403 finishes the leaching reaction, and the generated ore pulp is discharged. After the fifth reaction vessel 403 is completely fed, the reactant can be continuously fed to the first reaction vessel 403. By analogy, when the feeding of the reactant to one of the reaction kettles 403 is completed, at least one reaction kettle 403 finishes the discharge of the ore pulp and waits for the input of the reactant. Therefore, the slag cooler 402 can continuously output cooled reactants, and the continuous production device 100 for extracting rare earth sulfate from the electrolytic molten salt slag can continuously operate so as to continuously produce filtrate.
Finally, a plurality of outlets of the reaction kettle 403 are connected with an inlet of a filter press 5a, a leaching residue outlet of the filter press 5a is connected with one end of a rubber belt conveyor 6, the other end of the rubber belt conveyor 6 is connected with a leaching residue storage area, and a filtrate outlet of the filter press 5a is connected with a liquid storage tank 7.
The reaction kettle 403 conveys the ore pulp to a filter press 5a for filtration and separation, the filter press 5a separates the ore pulp into leaching residue and filtrate, the belt conveyor 6 is positioned below the filter press 5a and is connected with a leaching residue storage area and a leaching residue outlet of the filter press 5a, and the belt conveyor 6 receives the leaching residue falling from the filter press 5a and conveys the leaching residue to the leaching residue storage area. The filtrate outlet of the filter press 5a is connected with a liquid storage tank 7 through a pipeline, and the liquid storage tank 7 is used for storing filtrate. Through setting up rubber belt conveyor 6, do not need the manual work to carry and leach the sediment, further reduce artifical the participation, improve the degree of automation that the electrolysis molten salt sediment draws sulphuric acid tombarthite serialization apparatus for producing 100. Through setting up pressure filter 5a, compare in conventional bag filter, the filtration separation of filtrating in the slay is more thorough, and rare earth element's extraction efficiency is higher.
The operation of the continuous production apparatus 100 for extracting rare earth sulfate from electrolytic molten salt slag according to the embodiment of the present invention will be described with reference to fig. 1 and 2.
As shown in fig. 1 and 2, the electric single-beam crane 301 hoists the bagged molten salt slag in the bagged molten salt slag storage area to the lower end of the conveyor belt 3021 in the automatic bale breaker 302, and then the conveyor belt 3021 conveys the bagged molten salt slag to the bale breaker 3022 of the automatic bale breaker 302. The unpacking mechanism 3022 unpacks the bagged electrolytic molten salt slag and conveys the unpacked electrolytic molten salt slag into a hopper at the lower end of the bucket elevator 303. The bucket elevator 303 drives the hopper to move upwards to pour the electrolytic molten salt slag in the hopper into the second bin 304, and the electrolytic molten salt slag in the second bin 304 falls to the screw conveyor 101 and enters the automatic grinding machine 102 under the conveying of the screw conveyor 101.
The automatic grinding machine 102 grinds the electrolytic molten salt slag into electrolytic molten salt slag powder with set granularity, the electrolytic molten salt slag powder with set granularity enters the bin pump 103, and the electrolytic molten salt slag powder enters the second bin 304 through a pipeline under the drive of the bin pump 103. The electrolytic molten salt slag powder in the second storage bin 304 continuously enters the double-layer metering screw scale 202, the double-layer metering screw scale 202 continuously conveys the electrolytic molten salt slag powder with a set amount to the mixer 201, and meanwhile, the sulfuric acid pipeline conveys the sulfuric acid with a set amount to the mixer 201 under the control of the flow control valve. The sulfuric acid and the electrolytic molten salt slag powder entering the mixer 201 are uniformly mixed to form a mixed material with a set proportion (the ratio of the sulfuric acid to the electrolytic molten salt slag powder is 0.5:1-1:1), and the mixer 201 continuously conveys the mixed material to the screw feeder 203. The screw feeder 203 conveys a set amount of mixed materials to the acidification kiln 401, the mixed materials pass through the acidification kiln 401 and carry out roasting reaction at the reaction temperature of 250-280 ℃. The mixed material is discharged from the outlet of the acidification kiln 401, namely, the roasting reaction is completed, the reactant formed after the roasting reaction enters the slag cooler 402, the reactant is cooled while passing through the slag cooler 402, and the reactant is cooled to the set temperature (about 90 ℃) when being discharged from the outlet of the slag cooler 402. The cooled reactant is continuously delivered to one of the reaction kettles 403, the reaction kettle 403 is filled with the reactant and then undergoes leaching reaction (about 5 hours of leaching time) to form slurry, and the slag cooler 402 sequentially delivers the cooled reactant to the remaining reaction kettles 403. The ore slurry is conveyed to a filter press 5a for filtration and separation (the reaction kettle 403 is left empty to wait for the continuous conveying of the reactant again), leaching residue and filtrate are formed, and the leaching residue falls to the belt conveyor 6 and is conveyed to a leaching residue storage area by the belt conveyor 6. The filtrate is retained in a liquid storage tank 7 through a pipeline for storage.
The embodiment of the utility model preferably realizes full-automatic production through DCS control and remote on-line control, and ensures the continuity and stability of the production process; the current situation that each process needs frequent intervention of operators in the traditional production is changed to the maximum extent, and the industrial equipment level is improved.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. The utility model provides an electrolysis molten salt sediment draws sulphuric acid tombarthite serialization apparatus for producing which characterized in that includes:
the powder grinding unit comprises a powder grinding device and a first storage bin which are connected in sequence;
the mixing unit comprises a mixer, a flow control valve, a first quantitative feeder and a second quantitative feeder, wherein an inlet of the first quantitative feeder is connected with an outlet of the first bin, an electrolytic molten salt slag powder inlet of the mixer is connected with an outlet of the first quantitative feeder, a sulfuric acid inlet of the mixer is connected with the flow control valve, and a mixing outlet of the mixer is connected with an inlet of the second quantitative feeder;
the rare earth extraction unit comprises an acidification kiln, a plurality of slag coolers and a reaction kettle which are sequentially connected, wherein the inlet of the acidification kiln is connected with the outlet of the second quantitative feeder, the number of the reaction kettles is multiple, and the outlet of the slag cooler is connected with the inlets of the reaction kettles; and
and the inlet of the filtering and separating device is connected with the outlets of the reaction kettles.
2. The continuous production device for extracting rare earth sulfate from electrolytic molten salt slag according to claim 1, further comprising an electrolytic molten salt slag supply unit, wherein the electrolytic molten salt slag supply unit comprises an automatic bale breaker, a bucket elevator and a second bin, an outlet of the automatic bale breaker is matched with a hopper at the lower end of the bucket elevator, a hopper at the upper end of the bucket elevator is matched with an inlet of the second bin, and an outlet of the second bin is connected with an inlet of the grinding device.
3. The continuous production device for extracting rare earth sulfate from electrolytic molten salt slag as claimed in claim 2, wherein the electrolytic molten salt slag supply unit further comprises an electric single-beam crane for hoisting the bagged electrolytic molten salt slag to the automatic bale breaker.
4. The continuous production device for extracting rare earth sulfate from electrolytic molten salt slag as claimed in claim 3, wherein the automatic bale breaker comprises a conveyor belt and a bale breaker mechanism, the lower end of the conveyor belt is matched with the electric single-beam crane, the upper end of the conveyor belt is connected with the inlet of the bale breaker mechanism, and the outlet of the bale breaker mechanism is matched with the hopper at the lower end of the bucket elevator.
5. The continuous production device for extracting rare earth sulfate from electrolytic molten salt slag according to claim 2, wherein the grinding device comprises a screw conveyor, an automatic mill and a bin pump which are connected in sequence, the screw conveyor is arranged below the second bin, an inlet of the screw conveyor is connected with an outlet of the second bin through a pipeline, and an outlet of the bin pump is connected with an inlet of the first bin through a pipeline.
6. The continuous production device for extracting rare earth sulfate from electrolytic molten salt slag according to claim 5, wherein the first bin is provided with a vent, and a dust collection cloth bag is connected to the vent of the first bin.
7. The continuous production device for extracting rare earth sulfate from electrolytic molten salt slag according to claim 1 or 2, wherein the first quantitative feeder comprises a double-layer metering screw scale, and the first bunker is arranged above the double-layer metering screw scale.
8. The continuous production device for extracting rare earth sulfate from electrolytic molten salt slag according to claim 7, wherein the double-layer metering screw scale comprises a first metering screw and a second metering screw, an inlet of the first metering screw is connected with an outlet of the first storage bin, an outlet of the first metering screw is connected with an inlet of the second metering screw, and an outlet of the second metering screw is connected with an electrolytic molten salt slag powder inlet of the mixer.
9. The continuous production device for extracting rare earth sulfate from electrolytic molten salt slag according to claim 1 or 2, wherein the second constant feeder is a screw feeder.
10. The continuous production device for extracting rare earth sulfate from electrolytic molten salt slag according to claim 1 or 2, further comprising a belt conveyor and a liquid storage tank, wherein the filtering and separating device comprises a filter press, a leaching residue outlet of the filter press is connected with the belt conveyor, and a filtrate outlet of the filter press is connected with the liquid storage tank.
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