CN218516289U - Gas-solid high-efficiency separation and ore-coke fine powder recovery system for furnace gas discharged from boiling chlorination furnace - Google Patents
Gas-solid high-efficiency separation and ore-coke fine powder recovery system for furnace gas discharged from boiling chlorination furnace Download PDFInfo
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- CN218516289U CN218516289U CN202222284300.XU CN202222284300U CN218516289U CN 218516289 U CN218516289 U CN 218516289U CN 202222284300 U CN202222284300 U CN 202222284300U CN 218516289 U CN218516289 U CN 218516289U
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Abstract
The utility model relates to a boiling chlorination furnace goes out high-efficient separation of burner gas-solid and ore deposit burnt farine recovery system, including the chlorination furnace, thick liquids pulping tank, alpha type cyclone and circulation formula cyclone's cone all is equipped with the heat tracing device outward, the chlorination furnace is linked together through the blast pipe in proper order with alpha type cyclone's air inlet and circulation formula cyclone's air inlet, circulation formula cyclone's gas outlet is connected to titanium tetrachloride condensing system, all be equipped with first air-lock valve on alpha type cyclone and circulation formula cyclone's the unloading pipe, second air-lock valve and star type discharge valve, the end-to-end connection of circulation formula cyclone's unloading pipe has screw conveyer, screw conveyer's discharge end is linked together with alpha type cyclone's unloading pipe. The method can be used for efficiently recovering unreacted solid powder in the furnace gas discharged from the chlorination furnace, so that the fine powder is reduced to enter a titanium tetrachloride condensation system, and the yield of titanium tetrachloride is increased.
Description
Technical Field
The utility model belongs to the technical field of chlorination method titanium white powder production, specifically speaking relates to a boiling chlorination furnace goes out high-efficient separation of burner gas-solid and ore deposit burnt fine powder recovery system.
Background
In the production process of titanium dioxide by a chlorination method, titanium-rich ore, petroleum coke and chlorine are used as raw materials to react in a high-temperature fluidized bed to produce gaseous titanium tetrachloride. The titanium-rich ore is generally artificial/natural rutile, high titanium slag, ilmenite, and petroleum coke is used as a reducing agent in the reaction. The titanium-rich ore and the petroleum coke are added into a chlorination furnace through metering, chlorine is introduced into the chlorination furnace from the bottom to form a fluidized bed, and the chlorination furnace is operated at the chlorination pressure of 200kPa-300kPa and the chlorination temperature of 900 ℃ -1100 DEG CThe main chemical reactions that take place in: tiO2+ C + Cl 2 →TiCl 4 +CO+CO 2 Meanwhile, as the titanium-rich ore contains a small amount of other metal oxide impurities, the impurity components are also chlorinated at high temperature to generate corresponding metal chlorides. Therefore, the discharged gas of the chlorination furnace contains TiCl generated by the reaction 4 、CO、CO 2 、SO 2 And other metal chlorides (such as ferric chloride) and unreacted petroleum coke, titanium-rich ore solid powder.
In the prior art, crude titanium tetrachloride liquid at 60-80 ℃ is usually sprayed at the outlet of a chlorination furnace, the furnace gas discharged from the high-temperature chlorination furnace is cooled from 900-1100 ℃ to 150-250 ℃ for one time, the cooled titanium tetrachloride gas discharged from the high-temperature chlorination furnace containing unreacted titanium-rich ore, petroleum coke and metal chloride enters a cyclone dust collector for gas-solid separation, the separated gas phase part enters a titanium tetrachloride condensation system for condensation, the solid phase part enters a waste solid treatment system, acid wastewater is added as make-up water for slurrying, the slurried mixed solution is pumped to a filter press for primary filtration, and the primary filter cake is dried and then can be returned to the chlorination furnace to be used as a raw material again.
Because the native rutile in China has low grade, fine granularity, complex mineral composition, poor selectivity, low yield, great difficulty in large-scale development and utilization and shortage of rutile placer resources, most of the high-grade rutile raw materials need to be imported so far. Therefore, unreacted petroleum coke and titanium-rich ore solid powder in furnace gas discharged from the chlorination furnace need to be efficiently recycled, waste is changed into valuable, so that the scarce resources are utilized to the maximum extent, fine powder is reduced to enter a titanium tetrachloride condensation system, the blocking condition of heat exchange equipment of the titanium tetrachloride condensation system is greatly relieved, and the heat exchange efficiency is ensured. The yield of titanium tetrachloride is increased.
Therefore, the development of a system for efficiently separating gas and solid from the gas discharged from the fluidized bed chlorination furnace and recovering ore coke fine powder is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects and provide a system for efficiently separating gas and solid from the furnace gas discharged from a fluidized bed chlorination furnace and recovering ore coke fine powder.
The utility model provides a technical scheme as follows:
the system comprises a chlorination furnace, a slurry beating tank, an alpha-type cyclone separator and a circulating type cyclone separator, wherein heat tracing devices are arranged outside cones of the alpha-type cyclone separator and the circulating type cyclone separator, the chlorination furnace is communicated with an air inlet of the alpha-type cyclone separator through an exhaust pipe, an exhaust port of the alpha-type cyclone separator is communicated with an air inlet of the circulating type cyclone separator, an air outlet of the circulating type cyclone separator is connected to a titanium tetrachloride condensing system, a first air locking valve, a second air locking valve and a star-shaped discharge valve are sequentially arranged on a discharge pipe of the alpha-type cyclone separator and a discharge pipe of the circulating type cyclone separator from top to bottom, a screw conveyor is connected to the tail end of the discharge pipe of the circulating type cyclone separator, the discharge end of the screw conveyor is communicated with a discharge pipe of the alpha-type cyclone separator through a guide pipe, a discharge port of the discharge pipe of the guide pipe is arranged at the upper end of the star-shaped discharge valve on the discharge pipe of the alpha-type cyclone separator, the tail end of the discharge pipe of the alpha-type cyclone separator is connected to the slurry beating tank, and a discharge port of the slurry beating tank is connected to a discharge pump through a discharge port of the slurry beating tank.
Preferably, the heat tracing device comprises an electric tracing band and a temperature controller, and the electric tracing band is electrically connected with the temperature controller. Can support DCS control system preheats each cyclone key position before the device is started, avoids appearing the condensation condition, causes corresponding cyclone's jam.
Preferably, the first air-lock valve and the second air-lock valve are pneumatically controlled and alternately opened. Because cyclone separation system operation in-process requires highly to the gas tightness, direct influence separation efficiency, this application adopts two gas locking valve settings and controls through pneumatic actuator, can support DCS control system to carry out remote control and realize opening in turn, guarantees when improving the gas tightness that the unloading is smooth and easy.
Preferably, a plurality of pneumatic knocking hammers are arranged outside cones of the alpha-type cyclone separator and the circulating type cyclone separator, and the pneumatic knocking hammers and the heat tracing device are not interfered with each other. Can support DCS control system and strike corresponding cyclone regularly, ensure that equipment is unobstructed, reduce the intensity of labour that personnel struck, guarantee the steady operation of system.
Preferably, the device further comprises an air cannon, dredging ports are arranged at the bottom of an ash bucket of the alpha-type cyclone separator and below a first air locking valve and a second air locking valve on a discharging pipe of the alpha-type cyclone separator, the dredging ports are communicated with a cannon port of the air cannon through pneumatic valves respectively, and the air cannon is connected with a compressed air source. Through setting up the air bubble, can support DCS control system and realize remote control, and then dredge the operation to each corresponding part of alpha type cyclone and unloading pipe thereof, guarantee that the unloading is smooth and easy.
Preferably, the pulp beating tank is provided with an electric stirrer, an acid supplementing liquid pipe, a remote transmission liquid level meter and a remote transmission densimeter. The DCS is convenient to be matched with a DCS control system to control the index of the slurry according to the conditions of the liquid level and the density of the slurry, so that the qualified slurry is discharged to the next working section through the slurry pump.
Preferably, the outlet of the temporary storage tank pumps the slurry to an ultrahigh pressure filter press through a feeding pump, the pressure of the ultrahigh pressure filter press reaches 10MPa, and the filtering precision of the filter cloth of the ultrahigh pressure filter press is 2.6 μm grade. The fine ore coke powder separated by the alpha type cyclone separator and the circulating type cyclone separator can be effectively filtered and collected to prepare a filter cake.
Preferably, the slurry pump and the feeding pump are both made of silicon carbide, and impellers and pump shells of the slurry pump and the feeding pump are all made of air pressure sintering, so that the service life of the slurry pump and the feeding pump is effectively prolonged.
The utility model discloses still including other equipment or the subassembly that can make this boiling chlorination furnace go out high-efficient separation of burner gas-solid and ore deposit burnt fine powder recovery system normal use, these equipment or subassembly all adopt the conventional technical means in this area, if be used for carrying out remote control's DCS control system to each pneumatic or electric mechanism of this application. In addition, the utility model discloses in add the device and the subassembly of injecing and all adopt the conventional technical means in this field, need explain that chlorination furnace, thick liquids beating jar, alpha type cyclone, circulation formula cyclone, titanium tetrachloride condensing system, first air-lock valve, second air-lock valve, star type blowoff valve, screw conveyer, electric tracing area, temperature controller, pneumatic striking hammer, air cannon, electric mixer, teletransmission level gauge, teletransmission densimeter, superhigh pressure filter, thick liquids pump and charge pump in this application all adopt the technique that is publicly known in the art, and no longer the repeated description is given here.
The working principle of the application is that during the operation of the chlorination furnace, the discharged gas of the chlorination furnace mainly comprises titanium tetrachloride gas, metal chloride solid, unreacted ore coke fine powder particles and the like, the discharged gas of the chlorination furnace is firstly separated from the particles with the particle size of more than 10 micrometers through an alpha cyclone separator, the separation efficiency reaches more than 96%, and then the discharged gas of the chlorination furnace is separated from the particles with the particle size of more than 3 micrometers through a circulating type cyclone separator, and the separation efficiency reaches more than 98%, so that the solid content of the gas entering a titanium tetrachloride condensation system is greatly reduced. The method comprises the steps that dust collected by an alpha-type cyclone separator is conveyed to a slurry pulping tank through a first air locking valve, a second air locking valve and a star-shaped discharging valve on a discharging pipe of the alpha-type cyclone separator, dust collected by a circulating cyclone separator is conveyed to the discharging pipe of the alpha-type cyclone separator through the first air locking valve, the second air locking valve and the star-shaped discharging valve on the discharging pipe of the circulating cyclone separator, then the dust enters the slurry pulping tank, after acid liquid is supplemented to the slurry pulping tank, metal chloride is dissolved in water, and generation of alkali metal ion hydrolysis and generation of precipitate are inhibited in an acid environment, so that mixed slurry of ore coke fine powder and metal chloride solution is formed in the slurry pulping tank, and after the mixed slurry is discharged to a temporary storage tank through a slurry pump, liquid-solid separation is carried out through an ultrahigh pressure filter, and ore coke slag is obtained.
All set up first airlock valve, second airlock valve on alpha type cyclone and circulation formula cyclone's the unloading pipe in this application, can guarantee the gas tightness of corresponding cyclone in the unloading process, improve gas-solid separation efficiency, through setting up star type discharge valve, can carry out kibbling the time to the material piece of unloading in-process, guarantee that the unloading is steady to realize the stability of thick liquids making beating jar stirring process and liquid level. Through setting up the heat tracing device for preheat each cyclone's key position before system start-up, avoid appearing the condensation condition, cause corresponding cyclone's jam.
Compared with the prior art, the utility model discloses the beneficial effect who gains is:
1. the alpha-type cyclone separator is used as the primary separator, so that the separation efficiency is obviously improved and ash ring is eliminated compared with that of the traditional B-type cyclone separator, and the separation efficiency is greatly improved; the circulating cyclone separator is used as a secondary separator, the dust collection efficiency of low-micron-level dust is improved by 98%, the blockage of a rear titanium tetrachloride condensation system is greatly relieved, and the yield of titanium tetrachloride is improved.
2 this application can improve the stability that the material was withdrawed through setting up companion's heat facility, pneumatic striking hammer and air bubble.
In a word, the method can efficiently recover unreacted petroleum coke and titanium-rich ore solid powder in the furnace gas discharged from the chlorination furnace, changes waste into valuable, makes the scarce resources utilized to the maximum extent, can reduce fine powder entering a titanium tetrachloride condensation system, greatly slows down the blockage of heat exchange equipment of the titanium tetrachloride condensation system, ensures the heat exchange efficiency, and further increases the yield of titanium tetrachloride.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Detailed Description
The following describes the present invention in further detail with reference to the drawings and the detailed description.
Example (b):
as shown in fig. 1, the utility model provides a boiling chlorination furnace goes out high-efficient separation of gas-solid and ore deposit burnt fine powder recovery system of stove, including chlorination furnace 1, thick liquids beating tank 2, alpha type cyclone 3, circulation formula cyclone 4 and DCS control system (not shown in the figure), all be equipped with heat tracing device 5 outside the cone of alpha type cyclone 3 and circulation formula cyclone 4, chlorination furnace 1 is linked together through blast pipe 6 and alpha type cyclone 3's air inlet, the gas vent of alpha type cyclone 3 is linked together with circulation formula cyclone 4's air inlet, circulation formula cyclone 4's gas outlet is connected to titanium tetrachloride condensing system (not shown in the figure), all be equipped with first airlock valve 7, second airlock valve 8 and star type valve 9 from the top down on the unloading pipe of alpha type cyclone 3 and circulation formula cyclone 4 in proper order, the end-to-end connection of the unloading pipe of circulation formula cyclone 4 has screw conveyer 10, the discharge end of screw conveyer 10 is linked together through the stock guide 11 and the alpha type cyclone 3's unloading pipe, and star type cyclone 3's discharge gate is connected to the discharge gate through the stock guide 12 of unloading tank on the unloading pipe of the stock guide 11, the discharge gate of circulation formula cyclone 3 is connected to screw conveyer 10, the unloading tank is connected to the discharge gate of discharge gate 2 of the slurry beating type cyclone 3, the slurry beating tank 2.
In this embodiment, the heat tracing device 5 includes an electric tracing band and a temperature controller, and the electric tracing band is electrically connected to the temperature controller. Can match DCS control system and preheat each cyclone key position before the device is started, avoid appearing the condensation condition, cause corresponding cyclone's jam.
In this embodiment, the first air-lock valve 7 and the second air-lock valve 8 are both pneumatically controlled and alternately opened. Because cyclone separation system operation in-process requires highly to the gas tightness, direct influence separation efficiency, this application adopts two gas locking valve settings and controls through pneumatic actuator, can support DCS control system and carry out remote control and realize opening in turn, guarantees that the unloading is smooth and easy when improving the gas tightness.
In this embodiment, a plurality of pneumatic knocking hammers 14 are respectively arranged outside cones of the α -type cyclone separator 3 and the circulating type cyclone separator 4, and the pneumatic knocking hammers 14 and the heat tracing device 5 do not interfere with each other. Can support DCS control system and strike corresponding cyclone regularly, ensure that equipment is unobstructed, reduce the intensity of labour that personnel struck, guarantee the steady operation of system.
In this embodiment, the device further comprises an air cannon 15, the bottom of the ash bucket of the alpha-type cyclone separator 3, and dredging ports are arranged below the first air locking valve 7 and the second air locking valve 8 on the discharging pipe of the alpha-type cyclone separator 3, each dredging port is respectively communicated with a cannon port of the air cannon 15 through pneumatic valves, and the air cannon 15 is connected with a compressed air source (not shown in the figure). Through setting up air bubble 15, can support DCS control system and realize remote control, and then dredge the operation to each corresponding part of alpha type cyclone 3 and its unloading pipe, guarantee that the unloading is smooth and easy.
In the present embodiment, the slurry beating tank 2 is provided with an electric stirrer 16, an acid-replenishing liquid pipe 17, a remote liquid level meter (not shown in the figure), and a remote density meter (not shown in the figure). The DCS control system is convenient to be matched to control the index of the slurry according to the conditions of the liquid level and the density of the slurry, so that the qualified slurry is discharged to the next working section through the slurry pump 12.
In this embodiment, the slurry is pumped to an ultrahigh pressure filter press 19 through a feed pump 18 at the outlet of the temporary storage tank 13, the pressure of the ultrahigh pressure filter press 19 reaches 10MPa, and the filtering precision of the filter cloth of the ultrahigh pressure filter press 19 is 2.6 μm level. The fine ore coke powder separated by the alpha type cyclone separator 3 and the circulating type cyclone separator 4 can be effectively filtered and collected to prepare filter cakes.
In this embodiment, the slurry pump 12 and the feed pump 18 are made of silicon carbide, and the impellers and the pump housings of the slurry pump 12 and the feed pump 18 are made of air pressure sintering, so that the service life of the slurry pump 12 and the service life of the feed pump 18 are effectively prolonged.
The working principle of the application is that during the operation of a chlorination furnace 1, the discharged gas of the chlorination furnace mainly comprises titanium tetrachloride gas, metal chloride solid, unreacted ore coke fine powder particles and the like, the discharged gas of the chlorination furnace is firstly separated from particles with the particle size of more than 10 mu m through an alpha cyclone separator 3, the separation efficiency reaches more than 96%, and then the discharged gas of the chlorination furnace is separated from the particles with the particle size of more than 3 mu m through a circulating type cyclone separator 4, the separation efficiency reaches more than 98%, so that the solid content of the gas entering a titanium tetrachloride condensation system is greatly reduced. The dust collected by the alpha-type cyclone separator 3 is conveyed to the slurry beating tank 2 through the first air-lock valve 7, the second air-lock valve 8 and the star-shaped discharge valve 9 on the blanking pipe, the dust collected by the circulating cyclone separator 4 is conveyed to the blanking pipe of the alpha-type cyclone separator 3 through the first air-lock valve 7, the second air-lock valve 8 and the star-shaped discharge valve 9 on the blanking pipe, and then enters the slurry beating tank 2, after the slurry beating tank 2 is supplemented with acid liquid, because metal chloride is dissolved in water, the generation of alkali metal ion hydrolysis and the generation of precipitate are inhibited under an acid environment, so that mixed slurry of ore coke fine powder and metal chloride solution is formed in the slurry beating tank 2, and after the mixed slurry is discharged to the temporary storage tank 13 through the slurry pump 12, the mixed slurry is subjected to liquid-solid separation through the ultrahigh pressure filter 19, and the ore coke slag is obtained.
All set up first airlock valve 7, second airlock valve 8 on the unloading pipe of alpha type cyclone 3 and circulation formula cyclone 4 in this application, can guarantee the gas tightness of corresponding cyclone in the unloading process, improve gas-solid separation efficiency, through setting up star type discharge valve 9, can carry out kibbling the while to the material piece of unloading in-process, guarantee that the unloading is steady to realize the stability of thick liquids making beating jar stirring process and liquid level. Through setting up heat tracing device 5 for preheat each cyclone's key position before system start, avoid appearing the condensation condition, cause corresponding cyclone's jam.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a boiling chlorination furnace goes out high-efficient separation of gas-solid and ore deposit burnt fine powder recovery system of stove gas, includes chlorination furnace and thick liquids beating tank, its characterized in that: the chlorination furnace is communicated with an air inlet of the alpha-type cyclone separator through an exhaust pipe, an exhaust port of the alpha-type cyclone separator is communicated with an air inlet of the circulating type cyclone separator, an air outlet of the circulating type cyclone separator is connected to a titanium tetrachloride condensation system, a first air locking valve, a second air locking valve and a star-shaped discharge valve are sequentially arranged on a discharge pipe of the alpha-type cyclone separator and a discharge pipe of the circulating type cyclone separator from top to bottom, the tail end of the discharge pipe of the circulating type cyclone separator is connected with a spiral conveyor, the discharge end of the spiral conveyor is communicated with the discharge pipe of the alpha-type cyclone separator through a material guide pipe, the discharge port of the material guide pipe is arranged at the upper end of the star-shaped discharge valve on the discharge pipe of the alpha-type cyclone separator, the tail end of the discharge pipe of the alpha-type cyclone separator is connected to a discharge slurry beating tank, and a temporary storage tank is connected to a slurry beating tank through a slurry pump.
2. The system for efficiently separating gas from solid and recovering ore coke fine powder as claimed in claim 1, which is characterized in that: the heat tracing device comprises an electric tracing band and a temperature controller, and the electric tracing band is electrically connected with the temperature controller.
3. The system for efficiently separating gas from solid and recovering ore coke fine powder as claimed in claim 1, which is characterized in that: the first air locking valve and the second air locking valve are controlled in a pneumatic mode and are opened alternatively.
4. The system for high-efficiency gas-solid separation and fine ore-coke powder recovery of furnace gas discharged from a boiling chlorination furnace according to claim 1, which is characterized in that: and a plurality of pneumatic knocking hammers are arranged outside cones of the alpha-type cyclone separator and the circulating type cyclone separator, and the pneumatic knocking hammers and the heat tracing device are not interfered with each other.
5. The system for high-efficiency gas-solid separation and fine ore-coke powder recovery of furnace gas discharged from a boiling chlorination furnace according to claim 1, which is characterized in that: the device is characterized by further comprising an air cannon, wherein dredging holes are formed in the bottom of an ash bucket of the alpha-type cyclone separator and below the first air locking valve and the second air locking valve on the blanking pipe of the alpha-type cyclone separator, the dredging holes are respectively communicated with a cannon opening of the air cannon through pneumatic valves, and the air cannon is connected with a compressed air source.
6. The system for high-efficiency gas-solid separation and fine ore-coke powder recovery of furnace gas discharged from a boiling chlorination furnace according to claim 1, which is characterized in that: the slurry pulping tank is provided with an electric stirrer, an acid supplementing liquid pipe, a remote transmission liquid level meter and a remote transmission densimeter.
7. The system for high-efficiency gas-solid separation and fine ore-coke powder recovery of furnace gas discharged from a boiling chlorination furnace according to claim 1, which is characterized in that: and the outlet of the temporary storage pool pumps the slurry to an ultrahigh pressure filter press through a feed pump, the pressure of the ultrahigh pressure filter press reaches 10MPa, and the filtering precision of the filter cloth of the ultrahigh pressure filter press is 2.6 mu m grade.
8. The system for high-efficiency gas-solid separation and fine ore-coke powder recovery of furnace gas discharged from a boiling chlorination furnace according to claim 7, characterized in that: the slurry pump and the feeding pump are both made of silicon carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222284300.XU CN218516289U (en) | 2022-08-29 | 2022-08-29 | Gas-solid high-efficiency separation and ore-coke fine powder recovery system for furnace gas discharged from boiling chlorination furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222284300.XU CN218516289U (en) | 2022-08-29 | 2022-08-29 | Gas-solid high-efficiency separation and ore-coke fine powder recovery system for furnace gas discharged from boiling chlorination furnace |
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| CN218516289U true CN218516289U (en) | 2023-02-24 |
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| CN202222284300.XU Active CN218516289U (en) | 2022-08-29 | 2022-08-29 | Gas-solid high-efficiency separation and ore-coke fine powder recovery system for furnace gas discharged from boiling chlorination furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116199257A (en) * | 2023-03-07 | 2023-06-02 | 山东鲁北企业集团总公司 | Separation and recovery method of chlorinated product in titanium tetrachloride production process |
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2022
- 2022-08-29 CN CN202222284300.XU patent/CN218516289U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116199257A (en) * | 2023-03-07 | 2023-06-02 | 山东鲁北企业集团总公司 | Separation and recovery method of chlorinated product in titanium tetrachloride production process |
| CN116199257B (en) * | 2023-03-07 | 2024-01-26 | 山东鲁北企业集团总公司 | Separation and recovery method of chlorinated product in titanium tetrachloride production process |
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