CN110607449A - Alkali metal slag fine-grained hydrolysis system and use method thereof - Google Patents
Alkali metal slag fine-grained hydrolysis system and use method thereof Download PDFInfo
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- CN110607449A CN110607449A CN201910953603.6A CN201910953603A CN110607449A CN 110607449 A CN110607449 A CN 110607449A CN 201910953603 A CN201910953603 A CN 201910953603A CN 110607449 A CN110607449 A CN 110607449A
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- 239000002893 slag Substances 0.000 title claims abstract description 202
- 229910052783 alkali metal Inorganic materials 0.000 title claims abstract description 133
- 150000001340 alkali metals Chemical class 0.000 title claims abstract description 133
- 238000006460 hydrolysis reaction Methods 0.000 title claims abstract description 121
- 230000007062 hydrolysis Effects 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000005520 cutting process Methods 0.000 claims abstract description 67
- 238000007670 refining Methods 0.000 claims abstract description 67
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910001868 water Inorganic materials 0.000 claims abstract description 48
- 238000001914 filtration Methods 0.000 claims abstract description 36
- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 239000005662 Paraffin oil Substances 0.000 claims abstract description 25
- 230000008569 process Effects 0.000 claims abstract description 20
- 238000011010 flushing procedure Methods 0.000 claims abstract description 14
- 230000003301 hydrolyzing effect Effects 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000004064 recycling Methods 0.000 claims abstract description 10
- 238000001125 extrusion Methods 0.000 claims description 34
- 238000002955 isolation Methods 0.000 claims description 15
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 14
- 239000001257 hydrogen Substances 0.000 claims description 14
- 229910052739 hydrogen Inorganic materials 0.000 claims description 14
- 238000013461 design Methods 0.000 claims description 7
- 238000007790 scraping Methods 0.000 claims description 7
- 239000010419 fine particle Substances 0.000 claims description 4
- 239000013049 sediment Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 2
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 2
- 241001330002 Bambuseae Species 0.000 claims description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 2
- 239000011425 bamboo Substances 0.000 claims description 2
- 238000005406 washing Methods 0.000 claims description 2
- 230000029087 digestion Effects 0.000 abstract description 11
- 238000004200 deflagration Methods 0.000 abstract description 10
- 238000007599 discharging Methods 0.000 abstract description 10
- 238000011084 recovery Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 2
- 238000003825 pressing Methods 0.000 description 13
- 229910052744 lithium Inorganic materials 0.000 description 11
- 238000007667 floating Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 10
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000011148 porous material Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 230000011218 segmentation Effects 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 230000002269 spontaneous effect Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 229910052730 francium Inorganic materials 0.000 description 2
- KLMCZVJOEAUDNE-UHFFFAOYSA-N francium atom Chemical compound [Fr] KLMCZVJOEAUDNE-UHFFFAOYSA-N 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000012169 petroleum derived wax Substances 0.000 description 2
- 235000019381 petroleum wax Nutrition 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910001508 alkali metal halide Inorganic materials 0.000 description 1
- 150000008045 alkali metal halides Chemical class 0.000 description 1
- 229910000272 alkali metal oxide Inorganic materials 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/117—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for outward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
- B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
-
- 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
- C22B26/00—Obtaining alkali, alkaline earth metals or magnesium
- C22B26/10—Obtaining alkali 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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
-
- 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)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses an alkali metal recovery technology. The invention discloses an alkali metal slag fine-grained hydrolysis system which comprises a slag conveying oil filtering device and a slag refining device which are sequentially communicated, wherein an oil filtering screen cylinder for filtering paraffin oil and an oil discharging pipeline are arranged in the slag conveying oil filtering device, a plurality of groups of cutting mechanisms are arranged in the slag refining device, and an inclined water tank, a flushing pipeline for supplying water to the inclined water tank and a hydrolysis tank for collecting flushing liquid slag are arranged below a discharge hole of the slag refining device. The system can greatly improve the hydrolysis digestion speed of the alkali metal slag, fully hydrolyze the alkali metal slag, reduce the deflagration risk in the hydrolysis process and achieve the aim of safely hydrolyzing and recycling the alkali metal slag by systematically and optimally configuring the slag conveying oil filtering device, the slag refining device and the hydrolysis tank.
Description
Technical Field
The invention relates to an alkali metal recovery technology, in particular to an alkali metal slag fine-grained hydrolysis system and a using method thereof.
Background
Alkali metals currently account for six of lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr), the first five of which exist in nature and francium can only be produced by nuclear reactions. The alkali metal is mostly prepared by a method of melting alkali metal halide through electrolysis or thermal reduction, and the alkali metal slag is generated in the alkali metal manufacturing process and contains a large amount of alkali metal simple substances, other alkali metals, oxides and the like, for example, the metal lithium slag contains a large amount of metal lithium and a small amount of potassium, sodium, oxides, carbides and the like of the metal lithium slag. According to production statistics, the output of lithium slag is about 0.18 ton per 1 ton of lithium metal and products.
Before treatment, the alkali metal slag is usually soaked in petroleum wax, and after being fished out of the petroleum wax, the surface of the alkali metal slag is uniformly covered with a layer of oil film, and the oil film prevents the alkali metal from contacting water, oxygen, nitrogen and the like in the air, so that the alkali metal slag can be protected. However, as the storage time is prolonged, the oil film on the surface of the alkali metal slag becomes thinner gradually, and in the transportation process, the friction between the alkali metal slag promotes the damage of the oil film, the alkali metal slag which is not protected by the oil film reacts with water, oxygen, nitrogen and the like in the air to release a large amount of heat, hydrogen is generated, even spontaneous combustion and other dangerous situations occur, and the alkali metal slag needs to be disposed in time.
The alkali metal has high economic value as a noble metal, so the recycling of the alkali metal slag is particularly important, and the most important recycling mode at present is to carry out recycling treatment by a hydrolysis mode. However, in the prior process, the generated alkali metal slag is usually directly thrown into a hydrolysis tank without pretreatment, and a great potential safety hazard exists in the hydrolysis process. For example, the metal lithium slag contains more paraffin oil, and when the paraffin oil contained in the slag material is hydrolyzed, a floating oil layer is generated on the liquid surface of the hydrolysis tank, the existence of the floating oil layer influences the diffusion speed of hydrogen generated by reaction and the emission of heat, and if the hydrogen is not processed in time, spontaneous combustion or even explosion can be generated to a certain degree after accumulation, so that fire disasters are caused, and property and personal injuries are caused. However, the granularity of the lithium metal slag is larger when the lithium metal slag is put into the hydrolysis tank at present, the feeding speed is limited, if the lithium metal slag is cut into small blocks, the processing speed is improved, and experimental data in the text of spontaneous combustion and prevention of the lithium metal slag show that the digestion speed of the fine particle slag cannot exceed 50 kg/h.
Therefore, the key point of the safe recovery of the alkali metal slag is the fine-grained treatment device, but the systematic alkali metal slag treatment device and the hydrolysis system are lacked at present, so that the recovery process of the alkali metal slag has great potential safety hazard.
Disclosure of Invention
The invention aims to overcome the technical problem that the recovery process of alkali metal slag has larger potential safety hazard due to the lack of a systematic alkali metal slag treatment device and a hydrolysis system, and provides an alkali metal slag fine-grained hydrolysis system and a use method thereof.
In order to achieve the above purpose, the invention provides the following technical scheme:
the utility model provides an alkali metal sediment fine-grained system of hydrolysising, carries oil filter and slag refining device including the slag that communicates in proper order, the slag is carried to be equipped with in the oil filter and is used for filtering the oil filter screen section of thick bamboo of paraffin oil and set and arrange the oil extraction pipeline, the slag refines and establishes multiunit cutting mechanism in the device to discharge gate below of slag refining device disposes slope basin, to the washing pipeline of slope basin water feeding and the pond of hydrolysising that is used for collecting the flushing liquid sediment.
The hydrolysis system is provided with a slag conveying oil filtering device and a slag refining device which are communicated, most of paraffin oil in the alkali metal slag is filtered and discharged through an oil filtering screen cylinder of the slag conveying oil filtering device, so that the alkali metal slag entering the slag refining device is only provided with a small amount of paraffin oil, the paraffin oil content in a hydrolysis pool is also small, a small amount of oil floating layer is generated, the treatment is convenient, the obstruction of the oil floating layer on the diffusion speed and the heat emission of hydrogen generated by the hydrolysis reaction of the alkali metal slag is reduced, and the potential safety hazard is reduced; the system can further refine the alkali metal slag by matching with the structural design of a plurality of groups of cutting mechanisms of the slag refining device, so that the hydrolysis digestion speed of the alkali metal slag can be greatly improved by systematically and optimally configuring the slag conveying oil filtering device, the slag refining device and the hydrolysis tank, the slag is fully hydrolyzed, the deflagration risk in the hydrolysis process is reduced, and the aim of safely hydrolyzing and recycling the alkali metal slag is fulfilled.
Preferably, the hydrolysis tank is designed in a closed manner and is provided with an air draft mechanism. The air draft mechanism is used for timely discharging hydrogen generated in the hydrolysis process, and the rear end of the air draft mechanism can be connected with a tail gas treatment device, so that the deflagration risk in the hydrolysis process of the alkali metal slag is reduced.
Preferably, the slag conveying oil filter device further comprises an outer cylinder for installing an oil filter screen cylinder, a rotary screw shaft is arranged in the oil filter screen cylinder, a power device for driving the rotary screw shaft to rotate is arranged, and the rotary screw shaft is provided with spiral blades which are in contact with the inner wall of the oil filter screen cylinder. The rotary screw shaft arranged in the oil filter screen cylinder and the spiral blade on the rotary screw shaft are driven by a power device to rotate to convey the alkali metal slag, and meanwhile, the spiral blade is in contact with the inner wall of the oil filter screen cylinder and moves relatively, so that the oil filter screen cylinder can be prevented from being blocked, and the paraffin oil on the surface of the alkali metal slag is filtered through the pores of the oil filter screen cylinder.
Preferably, the wall of the outer cylinder is provided with an oil receiving cavity extending outwards, and the oil receiving cavity is provided with an oil discharge pipe. The paraffin oil filtered out through the pores of the oil filter screen cylinder is collected through the oil receiving cavity, and the paraffin oil is discharged by the oil discharge pipe so as to facilitate subsequent treatment.
Preferably, the slag refining device comprises a squeezing cylinder communicated with a discharge barrel of the slag conveying oil filtering device, and is provided with a squeezing plate assembly capable of reciprocating in the squeezing cylinder, a scraping hopper is connected to the squeezing end of the squeezing plate assembly, and a refining knife assembly is further connected to the discharge end of the squeezing cylinder. After the slag refining device receives the alkali metal slag which is filtered by the slag conveying oil filtering device and contains most of paraffin oil, the extrusion plate component and the scraping hopper are utilized to extrude and gather the slag in the pressure cylinder, and then the alkali metal slag is subjected to fine-grained treatment through the fine cutter set component, so that a foundation is provided for subsequent rapid and sufficient hydrolysis reaction.
Preferably, the thinning blade group component comprises a front blade holder and a rear blade holder, the front blade holder and the rear blade holder are both of a plate-shaped structure, a first cutting blade group and a second cutting blade group are sequentially arranged between the two blade holders, blades of the first cutting blade group are transversely arranged, and blades of the second cutting blade group are longitudinally arranged. The blades of the two blade groups are respectively transversely and longitudinally arranged, and the alkali metal slag extruded by the extrusion cylinder can be cut into thin strips after being overlapped, so that the fine grain pretreatment of the alkali metal slag is completed.
Preferably, the front knife rest and the rear knife rest are both provided with material openings for feeding and discharging materials, the first cutting blade group and the second cutting blade group are matched with the material openings in size, and limiting columns for limiting the cutting blade groups are arranged on the clamping surfaces of the two knife rests.
Preferably, an isolation frame is further arranged between the rear cutter frame and the second cutting blade group, a plurality of rows of isolation columns are arranged on the isolation frame, and the isolation columns are arranged in a clearance matching manner with the blades of the second cutting blade group. The design of the isolation frame can avoid the mutual contact and bonding of the alkali metal slag cut into thin strips, and is beneficial to the subsequent grain refining treatment.
Preferably, the extrusion plate assembly comprises an extrusion plate matched with the extrusion cylinder, and is provided with a piston rod and a hydraulic cylinder assembly which are connected with the extrusion plate, and a piston rod mounting hole is correspondingly formed in the cover plate of the extrusion cylinder. The hydraulic cylinder assembly and the piston rod are utilized to drive the extrusion plate to reciprocate in the extrusion cylinder, so that the alkali metal slag entering the extrusion cylinder is continuously extruded into a block shape, and the subsequent cutting treatment is facilitated.
Preferably, the granulating and cutting device further comprises a granulating and cutting wire assembly arranged at the discharge end of the refining cutter group component, the granulating and cutting wire assembly comprises a cutting wire frame and a driving mechanism for driving the cutting wire frame to reciprocate, and a plurality of cutting wires are arranged on the cutting wire frame. The granulating cutting wire assembly arranged at the discharge end of the refining cutter group component reciprocates under the driving of the driving mechanism, and the cutting wire is utilized to further granulate and cut the alkali metal slag cut into strips, so that the hydrolysis digestion efficiency of the alkali metal slag entering the hydrolysis tank is greatly improved.
A use method of an alkali metal slag fine-grained hydrolysis system comprises the following steps of:
A. filling water into a hydrolysis tank, introducing air into a system, starting an air draft mechanism and starting a circulating water pump for supplying water to a flushing pipeline;
B. adding alkali metal slag into the slag conveying and oil filtering device, starting the rotary screw shaft to rotate, and filtering paraffin oil through a hole, an oil receiving cavity and an oil discharge pipe on the oil filter screen cylinder in sequence in the process of conveying the alkali metal slag;
C. the alkali metal slag enters an extrusion cylinder of the slag refining device, is compressed and extruded to a refining cutter set component through an extrusion plate component, is divided into alkali metal slag strips, and is cut into fine particles through a granulating and cutting wire component;
D. the finely-grained alkali metal slag falls into an inclined water tank, enters a hydrolysis tank under the action of flushing fluid, is subjected to hydrolysis reaction, and is discharged with hydrogen above the hydrolysis tank in time through an air draft mechanism;
E. and recycling the water in the hydrolysis tank, draining the solution in the hydrolysis tank to a treatment device when the concentration of the solution in the hydrolysis tank reaches a set value, injecting new water, and continuing to perform hydrolysis treatment on the alkali metal slag.
The use method of the alkali metal slag grain refining hydrolysis system can improve the hydrolysis digestion speed of the alkali metal slag, so that the hydrolysis is full, the deflagration risk in the hydrolysis process is reduced, and the safe hydrolysis and recovery of the alkali metal slag are realized.
Compared with the prior art, the invention has the beneficial effects that:
1. the system can greatly improve the hydrolysis digestion speed of the alkali metal slag, fully hydrolyze the alkali metal slag and reduce the deflagration risk in the hydrolysis process by systematically and optimally configuring the slag conveying oil filtering device, the slag refining device and the hydrolysis tank, thereby achieving the aim of safely hydrolyzing and recycling the alkali metal slag;
2. the hydrolysis tank is designed in a closed manner, and the air draft mechanism is utilized to discharge hydrogen generated in the hydrolysis process in time, so that the deflagration risk in the alkali metal slag hydrolysis process is reduced;
3. the rotary screw shaft arranged in the oil filter screen cylinder and the helical blade on the rotary screw shaft are driven by a power device to do rotary motion to convey the alkali metal slag, and meanwhile, the helical blade is in contact with the inner wall of the oil filter screen cylinder and moves relatively, so that the oil filter screen cylinder can be prevented from being blocked, and paraffin oil on the surface of the alkali metal slag is filtered through the pores of the oil filter screen cylinder;
4. after the slag refining device receives the slag, the slag conveying oil filtering device filters most of alkali metal slag of paraffin oil, the extrusion plate assembly and the scraping hopper are used for extruding and gathering the slag in the pressure cylinder, and then the refining knife group component is used for carrying out fine-grained treatment on the alkali metal slag, so that a foundation is provided for carrying out rapid and sufficient hydrolysis reaction subsequently; the blades of the two blade groups are respectively transversely and longitudinally arranged, and the alkali metal slag extruded by the extrusion cylinder can be cut into thin strips after being overlapped, so that the fine grain pretreatment of the alkali metal slag is completed; the design of the isolation frame can avoid the mutual contact and adhesion of the alkali metal slag cut into thin strips, thereby being beneficial to the subsequent grain refining treatment;
5. the hydraulic cylinder assembly and the piston rod are utilized to drive the extrusion plate to reciprocate in the extrusion cylinder, so that the alkali metal slag entering the extrusion cylinder is continuously extruded into a block shape, and the subsequent cutting treatment is facilitated; the granulating cutting wire assembly arranged at the discharge end of the refining cutter group component reciprocates under the driving of the driving mechanism, and the cutting wire is utilized to further granulate and cut the alkali metal slag cut into strips, so that the hydrolysis digestion efficiency of the alkali metal slag entering the hydrolysis tank is greatly improved;
6. the use method of the alkali metal slag grain refining hydrolysis system can improve the hydrolysis digestion speed of the alkali metal slag, so that the hydrolysis is full, the deflagration risk in the hydrolysis process is reduced, and the safe hydrolysis and recovery of the alkali metal slag are realized.
Description of the drawings:
FIG. 1 is a schematic structural diagram of an alkali metal slag grain refining hydrolysis system according to the present invention.
Fig. 2 is a schematic structural diagram of a slag conveying oil filtering device in the embodiment.
FIG. 3 is a schematic structural diagram of a slag refining device in the embodiment.
Fig. 4 is a schematic structural diagram of a cover plate of the extrusion cylinder in the embodiment.
FIG. 5 is a schematic structural diagram of a pressure plate assembly according to an embodiment.
FIG. 6 is a schematic structural diagram of a thinning knife tackle component in the embodiment.
Fig. 7 is a schematic view of the combination of the wire holder and the cutting wire of the granulated cutting wire assembly in the embodiment.
The labels in the figure are: 1-circulating water pump, 2-water storage tank, 201-flushing pipe, 3-oil filtering driving motor, 4-pulley assembly, 5-slag material conveying oil filtering device, 501-feeding cylinder, 502-oil filtering net cylinder, 503-outer cylinder, 5031-oil receiving cavity, 504-discharging cylinder, 505-rotating screw shaft, 6-slag material refining device, 601-hydraulic cylinder assembly, 602-pressing cylinder cover plate, 603-pressing plate assembly, 6031-L-shaped pressing plate, 6032-steel ball, 6033-limit pin, 604-pressing cylinder, 605-scraping hopper, 606-refining knife assembly component, 6061-front knife rest, 6062-first cutting knife assembly, 6063-second cutting knife assembly, 6064-rear knife rest, 6065-isolation frame, 607-cutting knife rest, 608-driving disc, 609-coupling, 610-cutting driving motor, 611-cutting wire, 7-blowing nozzle, 8-inclined water tank, 9-protective cover, 10-water injection pipe, 11-exhaust fan, 12-hydrolysis tank, 13-floating oil liquid pump and 14-hydrolysis liquid pump.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example 1
As shown in fig. 1-7, the alkali metal slag grain refining hydrolysis system of the present embodiment includes a slag conveying oil filtering device 5 and a slag refining device 6 which are sequentially communicated, an oil filtering screen 502 for filtering paraffin oil and an oil discharging pipeline are arranged in the slag conveying oil filtering device 5, a plurality of cutting mechanisms are arranged in the slag refining device 6, and an inclined water tank 8, a flushing pipeline for supplying water to the inclined water tank 8 and a hydrolysis tank 12 for collecting flushing liquid slag are arranged below a discharge port of the slag refining device 6.
The hydrolysis system of the embodiment is provided with the slag conveying oil filtering device and the slag refining device which are communicated, most of paraffin oil in the alkali metal slag is filtered and discharged through the oil filtering screen cylinder of the slag conveying oil filtering device, so that the alkali metal slag entering the slag refining device is only provided with a small amount of paraffin oil, the paraffin oil content in the hydrolysis pool is also small, a small amount of oil floating layer is generated, the treatment is facilitated, the obstruction of the oil floating layer on the diffusion speed and the heat emission of hydrogen generated by the hydrolysis reaction of the alkali metal slag is reduced, and the potential safety hazard is reduced; the system can further refine the alkali metal slag by matching with the structural design of a plurality of groups of cutting mechanisms of the slag refining device, so that the hydrolysis digestion speed of the alkali metal slag can be greatly improved by systematically and optimally configuring the slag conveying oil filtering device, the slag refining device and the hydrolysis tank, the slag is fully hydrolyzed, the deflagration risk in the hydrolysis process is reduced, and the aim of safely hydrolyzing and recycling the alkali metal slag is fulfilled.
Example 2
Referring to FIGS. 1 to 7, in the system for finely granulating and hydrolyzing alkali metal slag according to example 1, the hydrolysis tank 12 of this example is of a closed design and is equipped with an air draft mechanism, i.e., an air draft fan 11. The air draft mechanism is used for timely discharging hydrogen generated in the hydrolysis process, and the rear end of the air draft mechanism can be connected with a tail gas treatment device, so that the deflagration risk in the hydrolysis process of the alkali metal slag is reduced.
Example 3
As shown in fig. 1 to 7, according to the system for refining and hydrolyzing alkali metal slag described in embodiment 1 or embodiment 2, the slag-conveying oil filter device 5 of this embodiment further includes an outer cylinder 503 for installing the oil screen cylinder 502, a rotary screw shaft 505 is provided in the oil screen cylinder 502, a driving device for driving the rotary screw shaft 505 to rotate is provided, and a helical blade is provided on the rotary screw shaft 505 and contacts with the inner wall of the oil screen cylinder 502. The rotary screw shaft arranged in the oil filter screen cylinder and the spiral blade on the rotary screw shaft are driven by a power device to rotate to convey the alkali metal slag, and meanwhile, the spiral blade is in contact with the inner wall of the oil filter screen cylinder and moves relatively, so that the oil filter screen cylinder can be prevented from being blocked, and the paraffin oil on the surface of the alkali metal slag is filtered through the pores of the oil filter screen cylinder.
Further, as shown in fig. 1, the driving means of the present embodiment is a filter driving motor 3, and is connected to a rotary screw shaft 505 through a pulley assembly 4.
Furthermore, an oil receiving cavity 5031 extending outwards is formed in the wall of the outer cylinder 503, and an oil discharge pipe is arranged on the oil receiving cavity 5031; the outer cylinder 503 is further provided with a feed cylinder 501 and a discharge cylinder 504. The paraffin oil filtered out through the pores of the oil filter screen cylinder is collected through the oil receiving cavity, and the paraffin oil is discharged by the oil discharge pipe so as to facilitate subsequent treatment.
Example 4
As shown in fig. 1 to 7, according to the system for refining alkali metal slag grain according to embodiment 3, the slag refining device 6 of this embodiment includes a squeezing cylinder 604 communicated with the discharging cylinder 504 of the slag conveying oil filtering device 5, and a squeezing plate assembly 603 capable of reciprocating in the squeezing cylinder 604, a scraping hopper 605 is connected to the squeezing end of the squeezing plate assembly 603, and a refining knife set component 606 is further connected to the discharging end of the squeezing cylinder 604. After the slag refining device receives the alkali metal slag which is filtered by the slag conveying oil filtering device and contains most of paraffin oil, the extrusion plate component and the scraping hopper are utilized to extrude and gather the slag in the pressure cylinder, and then the alkali metal slag is subjected to fine-grained treatment through the fine cutter set component, so that a foundation is provided for subsequent rapid and sufficient hydrolysis reaction.
Further, the thinning tool set component 606 comprises a front tool rest 6061 and a rear tool rest 6064, the front tool rest 6061 and the rear tool rest 6064 are both of plate-shaped structures, a first cutting blade group 6062 and a second cutting blade group 6063 are sequentially arranged between the two tool rests, the blades of the first cutting blade group 6062 are transversely arranged, and the blades of the second cutting blade group 6063 are longitudinally arranged. The blades of the two blade groups are respectively transversely and longitudinally arranged, and the alkali metal slag extruded by the extrusion cylinder can be cut into thin strips after being overlapped, so that the fine grain pretreatment of the alkali metal slag is completed.
Further, all offer the material mouth that is used for business turn over material on preceding knife rest 6061 and the back knife rest 6064, the size of first segmentation blade group 6062 and second segmentation blade group 6063 and the size phase-match of material mouth all are equipped with the spacing post that is used for spacing segmentation blade group on the clamping face of two knife rests.
Furthermore, an isolation frame 6065 is further arranged between the rear tool rest 6064 and the second cutting blade group 6063, and a plurality of rows of isolation columns are arranged on the isolation frame 6065 and are arranged in a clearance matching manner with the blades of the second cutting blade group 6063. The design of the isolation frame can avoid the mutual contact and bonding of the alkali metal slag cut into thin strips, and is beneficial to the subsequent grain refining treatment.
In this embodiment, as shown in fig. 3, the pressing plate assembly 603 includes a pressing plate designed to match with the pressing cylinder 604, the pressing cylinder 604 of this embodiment is a square barrel-shaped structure, the corresponding pressing plate is an L-shaped pressing plate 6031, and a piston rod and a hydraulic cylinder assembly 601 connected to the L-shaped pressing plate 6031 are provided.
As shown in fig. 4 and 5, a piston rod mounting hole and an L-shaped pressing plate limiting groove are correspondingly formed on the cover plate 602 of the extruding cylinder; the long side plate of the L-shaped pressing plate 6031 is tightly attached to the inner wall of the extrusion cylinder 604, three surfaces of the short side plate are provided with cylindrical grooves, steel balls 6032 are arranged in the cylindrical grooves and can freely roll, and in addition, the end parts of the cylindrical grooves are provided with limit pins 6033 for limiting the steel balls 6032 in the cylindrical grooves; by adopting the structure, the reciprocating movement of the extrusion plate component in the cylinder can be smoother; the hydraulic cylinder assembly and the piston rod are utilized to drive the extrusion plate to reciprocate in the extrusion cylinder, so that the alkali metal slag entering the extrusion cylinder is continuously extruded into a block shape, and the subsequent cutting treatment is facilitated.
Example 5
As shown in fig. 1 to 7, according to the system for refining alkali metal slag grain and hydrolyzing described in embodiment 4, this embodiment further includes a granulated cutting wire assembly disposed at the discharge end of the refining cutter set component 606, the granulated cutting wire assembly includes a cutting wire frame 607 and a driving mechanism for driving the cutting wire frame 607 to reciprocate, and a plurality of cutting wires 611 are disposed on the cutting wire frame 607. The granulating cutting wire assembly arranged at the discharge end of the refining cutter group component reciprocates under the driving of the driving mechanism, and the cutting wire is utilized to further granulate and cut the alkali metal slag cut into strips, so that the hydrolysis digestion efficiency of the alkali metal slag entering the hydrolysis tank is greatly improved.
Further, the driving mechanism of the present embodiment includes a cutting driving motor 610, a coupling 609 and a driving disk 608, which are connected in sequence, and the driving disk 608 is connected with the cutting wire frame 607.
Example 6
As shown in fig. 1 to 7, the system for refining alkali metal slag and hydrolyzing alkali metal slag according to any one of embodiments 1 to 5, which is further provided with a water circulation device including a water storage tank 2 and a flushing pipe 201 provided corresponding to the inclined water tank 8, a water injection pipe 10 and a water discharge pipe provided with a water circulation pump 1, are further provided with the hydrolysis tank 12, and the other end of the water circulation pump 1 is connected to the water storage tank 2.
Furthermore, a protective cover 9 is arranged on the inclined water tank 8, and a material blowing nozzle 7 connected with an air source is arranged for blowing air or cold air into the hydrolysis tank; the hydrogen and the flue gas generated by the reaction of the alkali metal slag on the inclined water tank can enter the hydrolysis tank, the concentration of the hydrogen above the hydrolysis tank is reduced, and the heat transfer in the hydrolysis tank is facilitated.
In this embodiment, a partition board is further arranged in the hydrolysis tank 12, the hydrolysis tank is divided into a left area and a right area, the left area mainly performs hydrolysis reaction, the bottom of the left area is respectively connected with a circulating water pump 1 and a hydrolysis liquid pump 14 through pipelines, and the circulating water pump 1 is used for pumping water in the hydrolysis tank into the water storage tank 2; when the concentration of the solution in the hydrolysis tank reaches a set value, the hydrolysis liquid pump 14 is started to work and is linked with a valve on the main water pipe 10 to replace the water in the hydrolysis tank 12; the right area is mainly used for collecting floating oil, and a floating oil pump 13 is arranged in the right area and used for discharging the collected floating oil in time; the periphery of the hydrolysis tank 12 is packaged by a shell, and is provided with an exhaust fan 11 for discharging hydrogen generated in the hydrolysis process in time, and the rear end of the hydrolysis tank can be connected with a tail gas treatment device. The opening and closing of the liquid pump 13 is controlled by a liquid level switch.
Example 7
The embodiment provides a use method of an alkali metal slag grain refining hydrolysis system, and when the alkali metal slag grain refining hydrolysis system described in embodiment 6 is used for alkali metal slag hydrolysis, the use method comprises the following steps:
A. filling water into a hydrolysis tank, introducing air into a system, starting an air draft mechanism and starting a circulating water pump for supplying water to a flushing pipeline;
B. adding alkali metal slag into the slag conveying and oil filtering device, starting the rotary screw shaft to rotate, and filtering paraffin oil through a hole, an oil receiving cavity and an oil discharge pipe on the oil filter screen cylinder in sequence in the process of conveying the alkali metal slag;
C. the alkali metal slag enters an extrusion cylinder of the slag refining device, is compressed and extruded to a refining cutter set component through an extrusion plate component, is divided into alkali metal slag strips, and is cut into fine particles through a granulating and cutting wire component;
D. the finely-grained alkali metal slag falls into an inclined water tank, enters a hydrolysis tank under the action of flushing fluid, is subjected to hydrolysis reaction, and is discharged with hydrogen above the hydrolysis tank in time through an air draft mechanism;
E. and recycling the water in the hydrolysis tank, draining the solution in the hydrolysis tank to a treatment device when the concentration of the solution in the hydrolysis tank reaches a set value, injecting new water, and continuing to perform hydrolysis treatment on the alkali metal slag.
The use method of the alkali metal slag grain refining hydrolysis system can improve the hydrolysis digestion speed of the alkali metal slag, so that the hydrolysis is full, the deflagration risk in the hydrolysis process is reduced, and the safe hydrolysis and recovery of the alkali metal slag are realized.
Claims (10)
1. The utility model provides an alkali metal sediment fine-grained system of hydrolysising, its characterized in that carries oil filter and slag charge to refine the device including the slag charge that communicates in proper order, the slag charge is carried and is equipped with the oil filter screen section of thick bamboo that is used for filtering the paraffin oil in the oil filter and set and arrange oil drain pipe, the slag charge refines and establishes multiunit cutting mechanism in the device to discharge gate below that the slag charge refines the device sets the slope basin, to the washing pipeline of slope basin water supply and be used for collecting the pond of hydrolysising of flushing liquid sediment.
2. The system for finely granulating and hydrolyzing alkali metal slag as claimed in claim 1, wherein said hydrolysis tank is of a closed design and is equipped with an air draft mechanism.
3. The system for refining and hydrolyzing the alkali metal slag according to claim 2, wherein the slag conveying oil filter device further comprises an outer cylinder for installing an oil filter screen cylinder, a rotary screw shaft is arranged in the oil filter screen cylinder, a power device for driving the rotary screw shaft to rotate is arranged, and helical blades are arranged on the rotary screw shaft and are in contact with the inner wall of the oil filter screen cylinder.
4. The alkali metal slag grain refining hydrolysis system according to claim 3, wherein the outer cylinder has an oil receiving cavity extending outward from a wall of the outer cylinder, and the oil receiving cavity is provided with an oil discharge pipe.
5. The alkali metal slag refining hydrolysis system according to claim 3 or 4, wherein the slag refining device comprises a squeezing cylinder communicated with the discharge barrel of the slag conveying oil filtering device, and is provided with a squeezing plate assembly capable of reciprocating in the squeezing cylinder, a scraping hopper is connected to the squeezing end of the squeezing plate assembly, and a refining knife set component is further connected to the discharge end of the squeezing cylinder.
6. The alkali metal slag grain refining and hydrolyzing system according to claim 5, wherein the refining blade set component comprises a front blade holder and a rear blade holder, the front blade holder and the rear blade holder are both of a plate-shaped structure, a first cutting blade set and a second cutting blade set are sequentially arranged between the two blade holders, the blades of the first cutting blade set are transversely arranged, and the blades of the second cutting blade set are longitudinally arranged.
7. The alkali metal slag grain refining and hydrolyzing system as claimed in claim 6, wherein an isolation frame is further arranged between the rear cutter frame and the second cutting blade group, a plurality of rows of isolation columns are arranged on the isolation frame, and the isolation columns are arranged in a clearance fit with the blades of the second cutting blade group.
8. The alkali metal slag grain refining hydrolysis system according to claim 5, wherein the extrusion plate assembly comprises an extrusion plate designed to match with the extrusion cylinder, and is provided with a piston rod and a hydraulic cylinder assembly connected with the extrusion plate, and a piston rod mounting hole is correspondingly formed in a cover plate of the extrusion cylinder.
9. The alkali metal slag grain refining hydrolysis system according to any one of claims 6 to 9, further comprising a granulated cutting wire assembly disposed at a discharge end of the refining cutter group component, wherein the granulated cutting wire assembly comprises a cutting wire frame and a driving mechanism for driving the cutting wire frame to reciprocate, and a plurality of cutting wires are disposed on the cutting wire frame.
10. The use method of the alkali metal slag refining hydrolysis system is characterized in that when the alkali metal slag refining hydrolysis system of claim 9 is used for alkali metal slag hydrolysis, the method comprises the following steps:
A. filling water into a hydrolysis tank, introducing air into a system, starting an air draft mechanism and starting a circulating water pump for supplying water to a flushing pipeline;
B. adding alkali metal slag into the slag conveying and oil filtering device, starting the rotary screw shaft to rotate, and filtering paraffin oil through a hole, an oil receiving cavity and an oil discharge pipe on the oil filter screen cylinder in sequence in the process of conveying the alkali metal slag;
C. the alkali metal slag enters an extrusion cylinder of the slag refining device, is compressed and extruded to a refining cutter set component through an extrusion plate component, is divided into alkali metal slag strips, and is cut into fine particles through a granulating and cutting wire component;
D. the finely-grained alkali metal slag falls into an inclined water tank, enters a hydrolysis tank under the action of flushing fluid, is subjected to hydrolysis reaction, and is discharged with hydrogen above the hydrolysis tank in time through an air draft mechanism;
E. and recycling the water in the hydrolysis tank, draining the solution in the hydrolysis tank to a treatment device when the concentration of the solution in the hydrolysis tank reaches a set value, injecting new water, and continuing to perform hydrolysis treatment on the alkali metal slag.
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| CN112522525A (en) * | 2020-12-01 | 2021-03-19 | 四川轻化工大学 | Continuous hydrolysis device and hydrolysis method for metal lithium slag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112522525A (en) * | 2020-12-01 | 2021-03-19 | 四川轻化工大学 | Continuous hydrolysis device and hydrolysis method for metal lithium slag |
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