CN115478175B - Pressurized kettle discharging equipment and method thereof - Google Patents
Pressurized kettle discharging equipment and method thereof Download PDFInfo
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- CN115478175B CN115478175B CN202211043756.5A CN202211043756A CN115478175B CN 115478175 B CN115478175 B CN 115478175B CN 202211043756 A CN202211043756 A CN 202211043756A CN 115478175 B CN115478175 B CN 115478175B
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- 238000007599 discharging Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 109
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims description 50
- 238000001914 filtration Methods 0.000 claims description 46
- 239000007921 spray Substances 0.000 claims description 34
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 21
- 239000010936 titanium Substances 0.000 claims description 16
- 229910052719 titanium Inorganic materials 0.000 claims description 16
- 239000000498 cooling water Substances 0.000 claims description 9
- 238000004804 winding Methods 0.000 claims description 5
- 239000006260 foam Substances 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000002386 leaching Methods 0.000 abstract description 22
- 238000001704 evaporation Methods 0.000 abstract description 5
- 230000008020 evaporation Effects 0.000 abstract description 5
- 238000005299 abrasion Methods 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000009854 hydrometallurgy Methods 0.000 abstract description 4
- 238000009991 scouring Methods 0.000 abstract description 4
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical compound [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 abstract description 3
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 abstract description 3
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 5
- 239000013049 sediment Substances 0.000 description 5
- 239000002562 thickening agent Substances 0.000 description 5
- 210000005056 cell body Anatomy 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- WWNBZGLDODTKEM-UHFFFAOYSA-N sulfanylidenenickel Chemical compound [Ni]=S WWNBZGLDODTKEM-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- KAEHZLZKAKBMJB-UHFFFAOYSA-N cobalt;sulfanylidenenickel Chemical compound [Ni].[Co]=S KAEHZLZKAKBMJB-UHFFFAOYSA-N 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 description 1
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- 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
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0453—Treatment or purification of solutions, e.g. obtained by leaching
- C22B23/0461—Treatment or purification of solutions, e.g. obtained by leaching by chemical methods
-
- 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
- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0453—Treatment or purification of solutions, e.g. obtained by leaching
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/02—Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical 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)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a pressurized kettle discharging device and a method thereof, relates to the technical field of nickel-cobalt hydrometallurgy pressurized wet leaching equipment, and solves the technical problems of unsmooth discharging, valve blockage, high-speed scouring and serious corrosion and abrasion of a pipeline of the conventional discharging device. The discharging equipment and the method can automatically and continuously discharge the autoclave, prevent flash evaporation steam from carrying leaching liquid to drain together, avoid the problems of blockage of the discharging equipment, valves and pipelines, high-speed scouring and serious corrosion and abrasion, improve the operating rate of the autoclave, and ensure the production of exquisite nickel sulfate products.
Description
Technical Field
The invention relates to the technical field of nickel-cobalt hydrometallurgy pressurizing wet leaching equipment, in particular to pressurized kettle discharging equipment and a discharging method thereof.
Background
In the nickel-cobalt hydrometallurgy industry, pressurized hydrometallurgy is a metallurgy with a reaction temperature higher than the boiling point of normal pressure liquid under the pressurized condition, and is a high-temperature and high-pressure leaching process. The acidic pressure leaching of nickel cobalt sulfide is usually carried out in a horizontal pressure kettle of a lead lined brick, nickel is leached preferentially in the pressure leaching process, copper reacts with nickel sulfide to generate copper sulfide precipitate, and the purpose of nickel-copper separation is achieved.
The pressure leaching equipment is provided with a pressure kettle, and the accessory equipment comprises a diaphragm metering pump, a stirring device, a discharging device, a tail gas adjusting device and the like. The discharging equipment is a key for realizing ore pulp discharging, filtering and gas-liquid separation after pressure leaching. And (3) separating tail gas from ore pulp discharged from the autoclave at the temperature of about 120 ℃ through a discharge device, cooling the separated ore pulp to 80 ℃, and discharging the cooled ore pulp into a thickener for liquid-solid separation.
Because the pipelines of the discharging equipment are in a closed state, only the ore pulp port of the flash tank is communicated with the tail gas outlet, and the ore pulp enters the tank for gas-liquid separation, thereby achieving the purposes of cooling and decompressing. In actual production, problems such as unsmooth pipeline discharge, valve blockage, high-speed scouring, serious corrosion and abrasion and the like often occur, and normal production of the autoclave and leaching effect of nickel sulfide raw materials are affected.
Disclosure of Invention
The invention aims at: the invention provides a pressurized kettle discharging device and a method thereof, which aim to solve the technical problems of unsmooth discharging of a pipeline of the discharging device, blockage of a valve, high-speed scouring and serious corrosion and abrasion.
The invention adopts the following technical scheme for realizing the purposes:
the utility model provides a reation kettle discharging equipment, includes reation kettle, reation kettle's outlet pipe department intercommunication has the filter, the filter is kept away from one side intercommunication of reation kettle has the buffer tank, the buffer tank is kept away from the one end intercommunication of filter has the flash tank, be provided with pneumatic governing valve between filter and the buffer tank, reation kettle is provided with DCS control system and two level gauges, pneumatic governing valve, two the level gauge all with DCS control system signal connection.
Further, the filter includes the barrel and sets firmly the back taper body of barrel bottom, be provided with the brace table in the barrel, the brace table top is provided with filtering mechanism, filtering mechanism top is provided with the blind plate, the blind plate covers the top of barrel, be located on the barrel filtering mechanism's the side is provided with the liquid outlet, the lower part of barrel is kept away from one side of liquid outlet is provided with the inlet, the bottom of back taper body is provided with unloads the cinder notch.
Further, the supporting table is of a ring-mounted structure and is fixedly arranged on the inner wall of the cylinder body, the filtering mechanism comprises a filter plate and a filter cartridge, the filter plate is arranged above the supporting table and is in butt joint with the top of the supporting table, a filtering hole is formed in the central position of the filter plate, and the bottom of the filter cartridge is arranged right above the filter plate and is communicated with the filtering hole.
Further, the number of the filters is two, namely a filter a and a filter b, liquid inlets of the filter a and the filter b are communicated with an outlet pipe of the autoclave through a three-way discharging pipe a, and a first plug valve is arranged between the outlet pipe of the autoclave and the discharging pipe a.
Further, the liquid outlets of the filter a and the filter b are communicated with the inlet of the buffer tank through a three-way discharging pipe b, the liquid outlets of the filter a and the filter b are respectively provided with a pneumatic regulating valve a and a pneumatic regulating valve b, and a second plug valve is arranged between the discharging pipe b and the inlet of the buffer tank.
Further, the flash tank comprises a tank body, the tank body is of a cylindrical structure, a liquid inlet and a manhole are formed in the tank body, a liquid inlet pipe is communicated with the liquid inlet, the liquid inlet pipe stretches into the center of the tank body and is provided with a spray pipe, one end of the spray pipe, far away from the liquid inlet pipe, is detachably provided with a spray head a, and a buffer table is arranged under the spray head a.
Further, the top of cell body is provided with the upper cover, the inside of upper cover is provided with the upper and lower gas vent that link up, the lower part of gas vent is provided with the demister, the upper portion of gas vent is provided with the blast pipe case, the bottom of cell body is provided with the low head, the buffer station sets up in the low head, the buffer station includes liquid receiving dish and titanium box, titanium box links firmly through many titanium gusset with liquid receiving dish, the low head bottom is provided with the leakage fluid dram.
Further, the demister is of a hollow structure which is vertically communicated, a plurality of layers of filtering sieve plates are arranged inside the demister, a plurality of through holes are formed in the filtering sieve plates, a plurality of clamping grooves are formed in the inner walls of the demister from top to bottom, the filtering sieve plates are inserted into the clamping grooves, and titanium wire windings are filled between every two adjacent layers of filtering sieve plates.
Further, a cooling water spray pipe is arranged on the side face of the exhaust pipe box, the cooling water spray pipe is inserted into the exhaust pipe box and provided with a detachable spray head b, and the spray head b is arranged downwards.
The application method of the autoclave discharging equipment comprises the following steps:
step 1: checking and confirming that a discharge pipeline, a spray head a, a spray head b, a receiving tray, lining bricks, a demister and a cooling water spray pipe in the flash tank are normal;
step 2: checking and confirming that the outlet valve, the pneumatic regulating valve a or the pneumatic regulating valve b of the autoclave is sensitive and reliable in the opening and closing of the sewage valve, and the filter and the pipeline of the sewage are unblocked;
step 3: checking and confirming that monitoring data of two liquid level meters of the autoclave are consistent, and controlling the two liquid level meters to be in flexible interlocking with a pneumatic regulating valve;
step 4: opening a first plug valve at the outlet of the autoclave, selectively opening a pneumatic regulating valve a or a pneumatic regulating valve b, and then opening a second plug valve;
step 5: setting the upper limit value and the lower limit value of two liquid level meters of the pressurized kettle on a DCS system, wherein the upper limit value is not higher than the height of the top of a partition wall of a last compartment of the pressurized kettle, the lower limit value is not lower than the height of a discharge hole of the pressurized kettle, and one liquid level meter is interlocked with a pneumatic regulating valve a or a pneumatic regulating valve b;
step 6: when the pressure of the autoclave is increased to 0.3-0.35 MPa and the liquid level value of the autoclave reaches the upper limit and the lower limit of the set liquid level, the automatic interlocking control is performed when the discharge is cut in, the temperature and the pressure are continuously increased, and the normal production is started.
The beneficial effects of the invention are as follows:
1. according to the invention, a filter, a buffer tank and a flash tank are sequentially connected at an outlet pipe of the autoclave, two liquid level meters and a DCS control system are arranged on the autoclave, a pneumatic regulating valve is arranged between the filter and the buffer tank, the upper limit value and the lower limit value of the two liquid level meters are arranged through the DCS control system, the liquid level of the autoclave and the pneumatic regulating valve are controlled in an interlocking manner, when the liquid level value reaches the upper limit of a set liquid level, the pneumatic regulating valve automatically opens and discharges, and when the liquid level value reaches the lower limit of the set liquid level, the pneumatic regulating valve automatically closes, and the pneumatic regulating valve circularly reciprocates in such a way, so that the automatic discharge of the autoclave is realized; the filter can completely intercept and filter particles in the leaching liquid which are easy to block the regulating valve and the nozzle; the DCS control system controls the pneumatic regulating valve and the liquid level meter to regulate the liquid level in the pressurizing kettle, so that the slurry in the kettle is continuously discharged, and smooth discharge is ensured; the buffer tank is matched with the flash tank for use, so that the effects of reducing temperature and pressure can be achieved, slurry flows into the thickener, flash steam is prevented from carrying leaching liquid to be emptied together, the start-up rate of the autoclave is improved, and the refined nickel sulfate product is ensured to be produced.
2. The filter is provided with two groups, namely a filter a and a filter b, and the outlets of the filter a and the filter b are correspondingly provided with a pneumatic control valve a and a pneumatic control valve b respectively to form two filtering systems, one filtering system can realize normal discharge, the other filtering system can be used as replacement, the stopping times caused by equipment damage maintenance or replacement are reduced, the smooth discharge is ensured, a filtering mechanism is arranged in a cylinder of the filter, the filter plate is used for carrying out primary filtering interception on the slag, the large-particle waste slag is intercepted under the cylinder, the leaching liquid enters a cavity between the filter cylinder and the cylinder through secondary filtering of the filter cylinder after entering the filter cylinder, is discharged through a liquid outlet, and the waste slag is completely intercepted and filtered through secondary filtering to prevent blocking of the pneumatic control valve and the spray head a.
3. The invention sets buffer tank between filter and flash tank, which makes pressure lixivium pressure, flow and temperature stable, the flash tank reduces pressure of pressure lixivium to atmospheric pressure, makes flash steam separate from lixivium, the lixivium carried by flash steam through demister is intercepted and cooled back to flash tank, and flows into thickener by gravity to carry out liquid-solid separation with other lixivium, flash steam is discharged or recycled after being cooled by cooling water, thus avoiding discharging lixivium and flash tail gas together. In addition, the buffer tank is matched with the flash tank to form two-stage flash evaporation, so that the cooling and pressure reducing effects are enhanced, meanwhile, the back pressure of a pipeline is improved, the front-back pressure difference of the pneumatic regulating valve is reduced, the erosion of the valve by the pressurized leaching liquid is reduced, and the service life of the valve is prolonged.
Drawings
FIG. 1 is a schematic diagram of a autoclave discharge process;
FIG. 2 is a schematic diagram of a filter structure;
FIG. 3 is a schematic diagram of a flash tank structure;
FIG. 4 is a schematic diagram of a demister structure;
FIG. 5 is a schematic view of a liquid inlet pipe structure;
reference numerals: 1-autoclave, 2-filter a, 21-inlet, 22-outlet, 23-deslagging, 24-blind, 25-filter plate, 26-filter cartridge, 27-cylinder, 28-support table, 29-deslagging valve, 3-buffer tank, 31-buffer tank inlet, 32-buffer tank outlet, 4-flash tank, 41-inlet, 42-vent, 43-manhole, 44-drain, 45-support seat, 46-flash tank inlet, 461-shower, 462-lock nut, 463-shower head, 47-cooling water shower, 48-vent pipe box, 49-demister, 491-clamp tank, 492-filter screen plate, 410-buffer table, 5-filter b, 6-pneumatic adjusting valve a, 7-pneumatic adjusting valve b, 8-first plug valve, 9-drain pipe a, 10-drain pipe b, 11-second plug valve, 12-inlet pipe plug valve.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, this embodiment provides a autoclave discharging device, including autoclave 1, autoclave 1's outlet pipe department intercommunication has the filter, the filter is kept away from autoclave 1's one side intercommunication has buffer tank 3, buffer tank 3 is kept away from the one end intercommunication of filter has flash tank 4, be provided with pneumatic control valve between filter and the buffer tank 3, autoclave 1 is provided with DCS control system and two level gauges, pneumatic control valve, two the level gauge all with DCS control system signal connection.
The filter, the buffer tank 3 and the flash tank 4 are sequentially connected to the outlet pipe of the autoclave 1 through flanges, two guided wave radar liquid level meters and a DCS control system are arranged on the autoclave 1, a pneumatic adjusting valve is arranged between the filter and the buffer tank 3, the upper limit value and the lower limit value of the two guided wave radar liquid level meters are arranged through the DCS control system, one liquid level meter and the pneumatic adjusting valve of the autoclave 1 are controlled in a linkage manner through the DCS control system, when the liquid level value reaches the upper limit of the set liquid level, the pneumatic adjusting valve automatically opens and discharges, when the liquid level value reaches the lower limit of the set liquid level, the pneumatic adjusting valve automatically closes, and the pneumatic adjusting valve is circularly reciprocated in such a way, so that the automatic discharging of the autoclave 1 is realized. In the process, the filter can completely intercept and filter particles in the leaching liquid, so as to prevent the regulating valve and the nozzle from being blocked; the pneumatic regulating valve is controlled to regulate the liquid level in the pressurizing kettle 1, so that the slurry in the kettle is continuously discharged, and the smooth discharge is ensured; the buffer tank and the flash tank 4 are matched to form two-stage flash evaporation by adopting a double flash evaporation technology, so that the cooling and decompression effects are enhanced, the pipeline back pressure is improved, the front-back pressure difference of the pneumatic regulating valve is reduced, the erosion of the valve by the pressurized leaching liquid is lightened, the service life of the valve is prolonged, slurry flows into the thickener, the flash steam is prevented from carrying the leaching liquid to be emptied together, the starting rate of the pressurized kettle 1 is improved, and the refined nickel sulfate product is ensured to be produced.
Example 2
The embodiment provides a use method of a discharging device of an autoclave 1, which is characterized by comprising the following steps:
step 1: checking and sequentially confirming that all parts of the flash tank 4, the buffer tank 3, an outlet valve of the autoclave 1, a pneumatic regulating valve a6 or a pneumatic regulating valve b7 and other switches are sensitive and reliable, and a filter and a discharge pipeline are unblocked;
step 2: checking and confirming that the monitoring data of the two liquid level meters of the autoclave 1 are consistent and are controlled sensitively in an interlocking way with the pneumatic regulating valve;
step 3: opening a first plug valve 8 at the outlet of the autoclave, selectively opening a pneumatic regulating valve a or a pneumatic regulating valve b, and then opening a second plug valve 11;
step 4: setting an upper limit value and a lower limit value of two liquid level meters of the autoclave 1 on a DCS system, wherein the upper limit value is not higher than the height of a partition wall top of a last compartment of the autoclave 1, the lower limit value is not lower than the height of a discharge hole of the autoclave 1, and one of the liquid level meters is interlocked with a pneumatic regulating valve a6 or a pneumatic regulating valve b 7;
step 5: when the pressure of the material discharged from the autoclave 1 is increased to 0.3-0.35 MPa and the liquid level value of the autoclave 1 reaches the set liquid level upper limit value, the material discharged is automatically controlled by interlocking, the pneumatic regulating valve a6 or the pneumatic regulating valve b7 is opened, the material discharged from the autoclave is started, the temperature and the pressure are continuously increased, the normal production is started, the trend graph of the liquid level meter is stable in ascending and descending modes, and the feeding time and the discharging time are constant; when the liquid level value is reduced to the lower limit value, the pneumatic regulating valve is closed, and the autoclave stops discharging.
The interlocking control mode of the liquid level and the pneumatic regulating valve of the autoclave 1: the two liquid level meters can be respectively and freely combined and interlocked with the pneumatic regulating valve a6 or the pneumatic regulating valve b7, when the liquid level value reaches the set liquid level high limit, the pneumatic regulating valve is automatically opened for discharging, and when the liquid level value reaches the set liquid level low limit, the pneumatic regulating valve is automatically closed, and the two liquid level meters are circularly reciprocated in such a way to realize the automatic discharging of the autoclave 1. And under any liquid level value condition, the pneumatic control valve a6 or the pneumatic control valve b7 can be controlled by manual operation on the DCS system by releasing the interlocking of the liquid level meter and the pneumatic control valve a6 or the pneumatic control valve b7, so that the discharging is realized.
If the discharging trend curve displayed on the DCS system is abnormal, if the discharging time is prolonged, the valve core, the filter, the buffer tank 3, the flash tank 4 and the nozzle are inspected, overhauled and replaced.
Normally, the trend graph is stable in rising and falling forms, and the time is constant. Such as prolonged fall time or trend morphology changes, indicating a discharge failure.
Faults fall into two categories: the trend map drops and suddenly changes to be horizontal or does not drop and rise reversely, which indicates that the discharge valve is blocked or the flash nozzle is blocked. The trend map is declining but trend is slowing, the time is prolonged, the pipeline jam is pointed out, and the pipeline is needed to be checked and treated.
The discharging method can monitor the discharging condition in real time, can timely and effectively treat abnormal conditions and ensures the normal operation of discharging.
Real time example 3
As shown in fig. 2, according to embodiment 1, the filter comprises a cylinder 27 and an inverted cone fixed at the bottom of the cylinder 27, a supporting table 28 is arranged in the cylinder 27, a filtering mechanism is arranged above the supporting table 28, a blind plate 24 is arranged above the filtering mechanism, the blind plate 24 covers the top of the cylinder 27, a liquid outlet 22 is arranged on the cylinder 27 and located at the side of the filtering mechanism, a liquid inlet 21 is arranged on the lower portion of the cylinder 27 and located at the side far away from the liquid outlet 22, and a slag discharging opening 23 is arranged at the bottom of the inverted cone. The supporting table 28 is of a ring-mounted structure and is fixedly arranged on the inner wall of the cylinder 27, the filtering mechanism comprises a filter plate 25 and a filter cartridge 26, the filter plate 25 is arranged above the supporting table 28 and is in butt joint with the top of the supporting table 28, a filtering hole is formed in the center of the filter plate 25, and the bottom of the filter cartridge 26 is arranged right above the filter plate 25 and is communicated with the filtering hole.
The two filters are respectively a filter a2 and a filter b5, a liquid inlet 21 of the filter a2 and a liquid inlet 21 of the filter b5 are communicated with an outlet pipe of the autoclave 1 through a three-way discharging pipe a9, and a first plug valve 8 is arranged between the outlet pipe of the autoclave 1 and the discharging pipe a 9. The liquid outlets 22 of the filter a2 and the filter b5 are communicated with the inlet of the buffer tank 3 through a three-way discharging pipe b10, the liquid outlets 22 of the filter a2 and the filter b5 are respectively provided with a pneumatic regulating valve a6 and a pneumatic regulating valve b7, and a second plug valve 11 is arranged between the discharging pipe b10 and the inlet of the buffer tank 3.
The utility model provides a filter, the filter comprises a barrel 27, the back taper body of barrel 27 bottom passes through flange joint, the lower part of barrel 27 is provided with inlet 21, the top of barrel 27 is provided with liquid outlet 22, install the sediment valve 29 that unloads in the bottom of back taper body, unload the sediment valve 29 in seted up with the sediment mouth 23 that unloads of filter inner chamber intercommunication, the periodic opening is unloaded the filter residue, the top of barrel 27 is fixed with blind plate 24 through the flange, the barrel 27 inside of filter is provided with filtering mechanism, filtering mechanism includes filter plate 25 and cartridge filter 26, filter plate 25 is fixed in the backup pad, the bottom of cartridge filter 26 and the top fixed connection of filter plate 25, the top of cartridge filter 26 is fixed on blind plate 24, the central point of filter plate 25 face is put and is covered with the circular through-hole of diameter 10mm, the bottom of cartridge filter 26 and 25 upper through-hole intercommunication, when the liquid level of filter plate is higher than filter plate 25, filter plate 25 carries out the filtration interception for the sediment in the sediment, with the waste residue interception of large granule in the below of barrel 27, get into the filter cartridge through the upper through the through-hole of filter plate 25 after the filtration of filter cartridge, the secondary filtration of filter cartridge and entering between cartridge and the barrel 27, discharge through the top of filter, through the filter outlet 22, and full pneumatic nozzle is blocked.
The filter is provided with two groups, namely a filter a2 and a filter b5, and the outlets of the filter a2 and the filter b5 are respectively provided with a pneumatic control valve a6 and a pneumatic control valve b7 correspondingly, so that two filter systems are formed, one filter system can be started to realize normal material discharge, the other filter system can be used as a replacement, the number of times of stopping caused by equipment damage maintenance or replacement is reduced, and smooth material discharge is ensured.
Example 4
As shown in fig. 3 to 5, according to embodiment 1, the flash tank 4 includes a tank body, the tank body is of a cylindrical structure, a liquid inlet 41 and a manhole 43 are provided on the tank body, the liquid inlet 41 is communicated with a liquid inlet pipe 12, the liquid inlet pipe 12 extends into the central position of the tank body and is provided with a spray pipe 461, one end of the spray pipe 461 away from the liquid inlet pipe 12 is detachably provided with a spray head a463, and a buffer table 410 is provided under the spray head a 463.
The top of cell body is provided with the upper cover, the inside of upper cover is provided with upper and lower link-up gas vent 42, the lower part of gas vent 42 is provided with the foam remover 49, the upper portion of gas vent 42 is provided with blast pipe case 48, the bottom of cell body is provided with the low head, buffer station 410 sets up in the low head, buffer station 410 includes connects liquid dish and titanium box, the titanium box links firmly through many titanium gusset with connecing the liquid dish, the low head bottom is provided with liquid outlet 22.
The demister 49 is of a hollow structure penetrating up and down, a plurality of layers of filtering screen plates 492 are arranged inside the demister 49, a plurality of through holes are formed in the filtering screen plates 492, a plurality of clamping grooves 491 are formed in the inner wall of the demister 49 from top to bottom, the filtering screen plates 492 are inserted into the clamping grooves 491, and titanium wire windings are filled between two adjacent layers of filtering screen plates 492. The side of the exhaust pipe box 48 is provided with a cooling water spray pipe 47, the cooling water spray pipe is inserted into the exhaust pipe box 48 and is provided with a detachable nozzle b, and the nozzle b is arranged downwards.
The feed liquor pipe 12 is connected with the feed liquor port 21 flange, one end of the feed liquor pipe 12, which is deep into the center of the tank body, is provided with a spray pipe 461, a spray head a463 is screwed and fixed on the spray pipe 461 by a locking nut 462, the spray direction of the spray head a463 is downwards, and a buffer table 410 is arranged under the spray head a463 and used for buffering the leaching liquid sprayed from the spray head a 463.
The demister 49 is of a tubular structure, three layers of circular filtering sieve plates 492 are arranged, through holes with the diameter of 10mm are distributed on the surfaces of the filtering sieve plates 492, 3 clamping grooves 491 are formed in the inner wall of the demister 49 from top to bottom, one clamping groove 491 is formed in each filtering sieve plate 492, which is inserted into each filtering sieve plate 492, stable connection is formed, titanium wire windings are filled between two adjacent layers of filtering sieve plates 492, an exhaust pipe box 48 is arranged above the demister 49, a cold water spray pipe 461 is arranged in the exhaust pipe box 48, cold water sprayed by the cold water spray pipe 461 is accumulated on the titanium wire windings and the filtering sieve plates 492 to be flushed into the flash tank 4, and flash evaporation steam is prevented from being discharged together with the leaching liquid.
The tank body is in flange connection with the upper end socket and the lower end socket, the buffer table 410 comprises a titanium box and a liquid receiving disc fixedly connected with the titanium box through four titanium rib plates, the liquid receiving disc is a titanium plate full of round through holes, and the titanium box is a square box. The titanium box is positioned at the center of the liquid receiving disc, receives the leaching liquid sprayed down, and makes the gas and the liquid perform first phase separation. When the leachate is sprayed from the spray head a463 at the tail end of the liquid inlet pipe 12, the pressure and the temperature are high, and the effects of cooling and decompressing are realized in the flash tank 4 through the buffer table 410. The separated leaching solution splashes out of the titanium box and falls on the liquid receiving disc, secondary phase separation is carried out, the pressure is released, the gas phase is discharged through the exhaust pipe of the foam remover 49, the dispersed leaching solution is converged through the circular holes and then falls down, and the dispersed leaching solution is discharged from the lower liquid outlet 44 and enters the thickener for liquid-solid separation.
Claims (5)
1. The utility model provides a pressurized kettle discharging equipment, includes pressurized kettle (1), its characterized in that, the exit tube department intercommunication of pressurized kettle (1) has the filter, the filter is kept away from one side intercommunication of pressurized kettle (1) has buffer tank (3), buffer tank (3) are kept away from one end intercommunication of filter has flash tank (4), be provided with pneumatic governing valve between filter and buffer tank (3), pressurized kettle (1) is provided with DCS control system and two level gauges, pneumatic governing valve, two the level gauges all with DCS control system signal connection, the filter includes barrel (27) and sets firmly the back taper body of barrel (27) bottom, be provided with brace table (28) in barrel (27), brace table (28) top is provided with filtering mechanism, the filtering mechanism top is provided with blind plate (24), blind plate (24) cover the top of barrel (27), barrel (27) upper portion are located filtering mechanism's side is provided with DCS control system and two level gauges, the filter is provided with filter cartridge (27) and is provided with in the back taper body (27) bottom, filter inlet (25) are in the back taper body (27) are provided with, filter inlet (25) are in the back taper body (27), the filter plate (25) is arranged above the supporting table (28) and is in butt joint with the top of the supporting table (28), a filter hole is formed in the center of the filter plate (25), the bottom of the filter cylinder (26) is arranged right above the filter plate (25) and is communicated with the filter hole, two filters are respectively a filter a (2) and a filter b (5), a liquid inlet (21) of the filter a (2) and the filter b (5) are communicated with an outlet pipe of the autoclave (1) through a three-way discharging pipe a (9), a first plug valve (8) is arranged between an outlet pipe of the autoclave (1) and the discharging pipe a (9), a liquid outlet (22) of the filter a (2), the filter b (5) and an inlet of the buffer tank (3) are communicated through a three-way discharging pipe b (10), a pneumatic regulating valve a (6) and a pneumatic regulating valve b (7) are respectively arranged at the liquid outlet (22) of the filter a (2) and the filter b (5), a pneumatic regulating valve b (4) is arranged between the inlet of the filter a (2) and the buffer tank (3) and the inlet of the second tank (4), the liquid inlet (41) is communicated with the outlet of the buffer tank (3) through a liquid inlet pipe (12), the liquid inlet pipe (12) stretches into the center of the tank body and is provided with a spray pipe (461), one end of the spray pipe (461), which is far away from the liquid inlet pipe (12), is detachably provided with a spray head a (463), and a buffer table (410) is arranged under the spray head a (463).
2. The autoclave discharging device according to claim 1, wherein an upper end enclosure is arranged at the top of the tank body, an upper through exhaust port (42) is arranged in the upper end enclosure, a foam remover (49) is arranged at the lower part of the exhaust port (42), an exhaust pipe box (48) is arranged at the upper part of the exhaust port (42), a lower end enclosure is arranged at the bottom of the tank body, a buffer table (410) is arranged in the lower end enclosure, the buffer table (410) comprises a liquid receiving disc and a titanium box, the titanium box is fixedly connected with the liquid receiving disc through a plurality of titanium rib plates, and a liquid outlet (44) is arranged at the bottom of the lower end enclosure.
3. The autoclave discharging device according to claim 2, wherein the demister (49) is of a hollow structure penetrating up and down, a plurality of layers of filtering sieve plates (492) are arranged inside the demister (49), a plurality of through holes are formed in the filtering sieve plates (492), a plurality of clamping grooves (491) are formed in the inner walls of the demister (49) from top to bottom, the filtering sieve plates (492) are inserted into the clamping grooves (491), and titanium wire windings are filled between two adjacent layers of the filtering sieve plates (492).
4. A autoclave discharge apparatus according to claim 3, wherein a cooling water spray pipe (47) is provided on a side face of the exhaust pipe box (48), and the cooling water spray pipe (47) is inserted into the exhaust pipe box (48) and provided with a detachable nozzle b, the nozzle b being provided downward.
5. The method for using the autoclave discharging equipment according to any one of claims 1 to 4, which is characterized by comprising the following steps:
step 1: checking and sequentially confirming that all parts of the flash tank, the buffer tank, the outlet valve of the autoclave, the pneumatic regulating valve a or the pneumatic regulating valve b are sensitive and reliable in opening and closing, and the filter and the discharging pipeline are unblocked;
step 2: checking and confirming that monitoring data of two liquid level meters of the autoclave are consistent, and controlling the two liquid level meters to be in flexible interlocking with a pneumatic regulating valve;
step 3: opening a first plug valve at the outlet of the autoclave, selectively opening a pneumatic regulating valve a or a pneumatic regulating valve b, and then opening a second plug valve;
step 4: setting an upper limit value and a lower limit value of two liquid level meters of the autoclave on a DCS system, wherein the upper limit value is not higher than the height of a partition wall top of a last compartment of the autoclave, the lower limit value is not lower than the height of a discharge hole of the autoclave, and one liquid level meter is interlocked with a pneumatic regulating valve a or a pneumatic regulating valve b;
step 5: when the pressure of the autoclave is increased to 0.3-0.35 MPa and the liquid level value of the autoclave reaches the upper limit value of the set liquid level, the automatic interlocking control is cut in, the pneumatic regulating valve a or the pneumatic regulating valve b is opened, the autoclave starts to discharge, the temperature and the pressure are continuously increased, normal production is started, at the moment, the trend graph of the liquid level meter is stable in ascending and descending modes, and the feeding time and the discharging time are constant; when the liquid level value is reduced to the lower limit value, the pneumatic regulating valve is closed, and the autoclave stops discharging.
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| CN202211043756.5A CN115478175B (en) | 2022-08-29 | 2022-08-29 | Pressurized kettle discharging equipment and method thereof |
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| CN202211043756.5A CN115478175B (en) | 2022-08-29 | 2022-08-29 | Pressurized kettle discharging equipment and method thereof |
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| CN115478175B true CN115478175B (en) | 2023-11-21 |
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| JP2022080505A (en) * | 2020-11-18 | 2022-05-30 | 住友金属鉱山株式会社 | Flash device and residue extraction method after stop of operation thereof |
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| WO2005066378A1 (en) * | 2004-01-07 | 2005-07-21 | Grenvil Marquis Dunn | Exothermic pressure leach autoclave circuits |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202072742U (en) * | 2011-04-27 | 2011-12-14 | 四川省尼科国润新材料有限公司 | Low ice nickel leached vapor-solid-liquid separation flash tank equipment |
| CN104120252A (en) * | 2014-07-25 | 2014-10-29 | 长沙有色冶金设计研究院有限公司 | Ore pulp cooling method and device for pressurized oxygen leaching of zinc sulfide concentrate |
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| CN110551892A (en) * | 2019-10-17 | 2019-12-10 | 中国恩菲工程技术有限公司 | mineral separation device containing tungsten-tin concentrate |
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Effective date of registration: 20240218 Address after: 737100 No. 2 Lanzhou Road, Beijing Road Street, Jinchuan District, Jinchang City, Gansu Province Patentee after: Jinchuan Group Nickel Cobalt Co.,Ltd. Country or region after: China Address before: 737104 No. 98, Jinchuan Road, Jinchuan District, Jinchang City, Gansu Province Patentee before: JINCHUAN GROUP Co.,Ltd. Country or region before: China |