CN113946167B - Liquid level control device and control method for titanium sponge reactor - Google Patents
Liquid level control device and control method for titanium sponge reactor Download PDFInfo
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- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
- C22B34/1263—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining metallic titanium from titanium compounds, e.g. by reduction
- C22B34/1268—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining metallic titanium from titanium compounds, e.g. by reduction using alkali or alkaline-earth metals or amalgams
- C22B34/1272—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining metallic titanium from titanium compounds, e.g. by reduction using alkali or alkaline-earth metals or amalgams reduction of titanium halides, e.g. Kroll process
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Abstract
The device comprises a titanium sponge reactor, a magnesium chloride discharge pipe, a magnesium chloride buffer tank and an argon pressurizing control system, wherein magnesium chloride discharged from the titanium sponge reactor through the magnesium chloride discharge pipe enters the magnesium chloride buffer tank for buffering, a magnesium chloride suction pipe for connecting a magnesium chloride conveying ladle is arranged in the magnesium chloride buffer tank, and an upper pipe orifice of the magnesium chloride suction pipe is a ladle interface; the argon pressurizing control system is used for respectively providing argon for the titanium sponge reactor, the magnesium chloride buffer tank and the magnesium chloride suction pipe through pipelines and controlling the opening and closing of pressurizing control valves on the corresponding pipelines; the titanium sponge reactor and the magnesium chloride buffer tank are respectively provided with a pressure relief pipeline; the control method comprises a discharging stage of the titanium sponge reactor and a discharging stage of the magnesium chloride buffer tank, and solves the problems that the liquid level fluctuation is large and the control is difficult in the reduction reaction process of the titanium sponge reactor through the cooperation of a pressurization control valve and a pressure release pipeline.
Description
Technical Field
The invention belongs to the technical field of titanium sponge production processes, and particularly relates to a liquid level control device and a liquid level control method for a titanium sponge reactor.
Background
The technology for producing the titanium sponge by the Kelol method adopts an inverted U-shaped reactor to carry out liquid magnesium and titanium tetrachloride reduction reaction to produce the titanium sponge. The existing production technology of titanium sponge mainly comprises the steps of adding excessive liquid magnesium at one time, continuously and slowly adding titanium tetrachloride, and because the high temperature of 800-900 ℃ is kept in a reactor, adding titanium tetrachloride for instant gasification and rapid reaction of liquid magnesium steam in a space above the liquid surface to produce titanium sponge (solid state) and magnesium chloride (liquid state), wherein the density of the titanium sponge is higher than that of the liquid magnesium, the liquid magnesium is always positioned at the uppermost layer, the magnesium chloride and the titanium sink to the bottom, a sieve plate is arranged at the bottom of the reactor to separate the titanium from the magnesium chloride, the liquid magnesium chloride can enter a bottom head area, but the liquid surface area is the most main reaction area, and the liquid level fluctuation directly influences the quality of the titanium sponge and the low-value wall climbing titanium production amount. According to the calculation of the chemical reduction reaction, the weight of magnesium chloride generated by the reaction is 3.96 times of that of magnesium chloride consumed by the liquid, but the density of the magnesium chloride is only 1.555g/cm3, the density of the magnesium chloride is 1.672g/cm3, and as the reaction proceeds, 1 cubic liquid magnesium is consumed to generate 3.68 cubic magnesium chloride, and meanwhile, the reaction liquid level continuously rises due to the existence of solid sponge titanium. The traditional liquid level process control method is that after the reaction is carried out for a certain time, the liquid level rises by 200-300mm, a magnesium chloride discharge pipe of the titanium sponge reactor is assembled and butted with a magnesium chloride conveying ladle, argon is filled into the reactor to be pressurized until the pressure reaches 80kpa, the magnesium chloride is discharged out of the reactor, the liquid level is reduced again to the original reaction to maintain the liquid level, then the feeding production is continued, and the reduction reaction is continued for a plurality of magnesium chloride discharge periods to obtain the titanium sponge with a certain weight. Each discharge cycle lasts for 4-5 hours, and the assembly discharge time lasts for 30-50 minutes/time. The magnesium chloride discharge amount in each period is mainly related to the actual labor intensity, and under the condition that the liquid level keeps small drop, ladle needs to be frequently docked and pressurized for discharging, so that the production stability is seriously affected; under the condition that the liquid level keeps larger drop, the range of the reaction zone is too large, the local reaction temperature is too high, the content of impurity iron in the produced sponge titanium is increased, meanwhile, the production amount of wall climbing titanium is increased, the wall climbing titanium is a low-value titanium product, and the product value is seriously reduced.
Meanwhile, along with the continuous growth of the titanium sponge lump, the top of the titanium lump exceeds the liquid level in the later reaction stage, so that the liquid level measurement is extremely difficult, manual measurement can be performed only in a manual measurement mode, and the accurate control of the liquid level is more difficult. When the reduction reaction is finished, a large amount of magnesium chloride in the reactor needs to be discharged (about 10 tons) at one time, and a magnesium chloride ladle needs to be connected for discharging for a plurality of times (3-5 times) (the normal discharging takes more than 2 hours, but the abnormal situation can last for 20-30 hours), a large amount of waiting time exists, the reactor occupies a significant period of a furnace, the yield of the titanium sponge is reduced, and the cost is increased.
Research shows that the narrowest range of reaction belt fluctuation can ensure more stable quality of the titanium sponge and control excessive generation of wall climbing titanium, and high-quality titanium sponge can be obtained only under the condition that the liquid level in the titanium sponge reactor is kept to the minimum fluctuation. However, the labor intensity of staff is greatly increased, the transfer ladle discharging times are increased, the production continuity is not ensured correspondingly, the production period of the reduction reaction is increased, the quality deterioration of the titanium sponge is indirectly influenced, and the contradiction is obvious.
Disclosure of Invention
The invention aims to provide a liquid level control device and a liquid level control method for a titanium sponge reactor, which are used for discharging magnesium chloride out of the reactor for a small number of times on the premise of not increasing the labor intensity and ensuring continuous and stable production, accurately controlling the liquid level of the reactor to fluctuate within 50mm, solving the problems of product quality deterioration and obviously increased wall climbing titanium amount caused by large fluctuation of the liquid level of a product, and shortening the production period of the titanium sponge production process.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: a liquid level control device of a titanium sponge reactor comprises a titanium sponge reactor and a magnesium chloride discharge pipe, wherein one end of the magnesium chloride discharge pipe extends into the bottom of the titanium sponge reactor, and the other end extends out of the titanium sponge reactor; the device also comprises a magnesium chloride buffer tank and an argon pressurizing control system, wherein magnesium chloride discharged from the titanium sponge reactor through a magnesium chloride discharge pipe enters the magnesium chloride buffer tank for buffering, a magnesium chloride suction pipe for connecting a magnesium chloride conveying ladle is arranged in the magnesium chloride buffer tank, and an orifice at the upper end of the magnesium chloride suction pipe is a ladle interface; the argon pressurizing control system is used for respectively providing argon for the titanium sponge reactor, the magnesium chloride buffer tank and the magnesium chloride suction pipe through pipelines and controlling the opening and closing of pressurizing control valves on the corresponding pipelines; and pressure relief pipelines are respectively arranged on the titanium sponge reactor and the magnesium chloride buffer tank.
The magnesium chloride buffer tank is provided with a buffer tank pressure detection device, a buffer tank liquid level detection device and a buffer tank temperature detection device.
The buffer tank pressure detection device and the buffer tank liquid level detection device are arranged at the top of the magnesium chloride buffer tank, and the buffer tank temperature detection device is arranged on the side face of the magnesium chloride buffer tank and corresponds to the buffer area of the magnesium chloride.
The upper part of the titanium sponge reactor is provided with a reactor pressurizing pipe, and the reactor pressurizing pipe is connected with an argon pressurizing control system through a reactor pressurizing control valve; the upper part of the magnesium chloride buffer tank is provided with a buffer tank pressurizing pipe which is connected with an argon pressurizing control system through a buffer tank pressurizing control valve; and a magnesium chloride suction pipe pressurizing port is arranged on the magnesium chloride suction pipe and close to the ladle joint, and is connected with an argon gas pressurizing control system through a suction pipe pressurizing control valve.
And a heating and heat-preserving device is arranged on the magnesium chloride discharge pipe and positioned between the titanium sponge reactor and the magnesium chloride buffer tank so as to ensure that the temperature of the pipe is not lower than 720 ℃.
The magnesium chloride buffer tank is provided with a heating and heat preserving device, and the temperature is ensured to be not lower than 720 ℃.
A method for controlling the liquid level of a titanium sponge reactor, comprising:
(1) Discharging stage of the titanium sponge reactor: when the liquid level in the titanium sponge reactor rises to a discharge set value or reaches a process requirement discharge period, a buffer tank pressure relief control valve is opened to relieve pressure of the magnesium chloride buffer tank, the mouth of a magnesium chloride suction pipe of the magnesium chloride buffer tank is closed, then a reactor pressurization control valve is opened to slowly pressurize the titanium sponge reactor, and magnesium chloride is discharged from a magnesium chloride discharge pipe in the titanium sponge reactor to the magnesium chloride buffer tank; when the liquid level in the magnesium chloride buffer tank reaches a specified value, closing a reactor pressurization control valve and a buffer tank pressure relief control valve, opening the reactor pressure relief control valve to relieve pressure of the titanium sponge reactor, and closing the reactor pressure relief control valve when the pressure of the titanium sponge reactor is lower than the pressure of the magnesium chloride buffer tank and a certain pressure difference is maintained;
(2) Magnesium chloride buffer tank discharging stage: after repeating the discharging stage of the titanium sponge reactor for a plurality of times, when the liquid level of the magnesium chloride buffer tank rises to the highest liquid level, butting a magnesium chloride suction pipe orifice on the magnesium chloride buffer tank with a magnesium chloride conveying ladle, and sucking the magnesium chloride in the magnesium chloride buffer tank to the magnesium chloride conveying ladle by pumping the magnesium chloride conveying ladle; stopping pumping the magnesium chloride conveying ladle when the magnesium chloride in the magnesium chloride buffer tank is reduced to the minimum liquid level, filling argon into the magnesium chloride conveying ladle to maintain micro-positive pressure, disconnecting the magnesium chloride conveying ladle from the orifice of the magnesium chloride suction pipe, and sealing the orifice of the magnesium chloride suction pipe; and finally, opening a pressurizing control valve at the outlet of the buffer tank to fill argon into a magnesium chloride suction pipe at which the magnesium chloride outlet is positioned.
And in the discharging stage of the titanium sponge reactor, after the reactor pressurization control valve and the buffer tank pressure relief control valve are closed, the buffer tank pressurization control valve is opened, and partial argon is filled into the magnesium chloride buffer tank so as to prevent magnesium chloride in the titanium sponge reactor from entering a magnesium chloride discharging pipe.
The beneficial effects of the invention are as follows: 1. the liquid level fluctuation in the reactor is controlled to be within 50mm in the production process of the titanium sponge, and the liquid level in the reactor can be accurately controlled by measuring the liquid level of the magnesium chloride buffer tank.
2. Compared with the operation time of 30-50 minutes per time in the traditional method, the operation time of the invention is reduced by at least 70%, and the invention also solves the problem of long waiting time of magnesium chloride discharge at last time, so that the production period of the reduction stage is shortened by 10 hours. Thereby greatly shortening the production period of the reduction stage.
3. The turnover frequency of the magnesium chloride ladle is reduced, and the labor intensity of manually docking the ladle is greatly reduced.
4. The stability of the titanium values of the produced sponge titanium is greatly improved, and the wall climbing titanium amount is reduced by 40%.
Drawings
FIG. 1 is a schematic diagram of the liquid level control device of the titanium sponge reactor.
The marks in the figure: 1. the device comprises a titanium sponge reactor, 2 magnesium chloride discharge pipes, 3 magnesium chloride buffer tanks, 4 argon gas pressurization control systems, 5 buffer tank pressure relief pipelines, 6 reactor pressurization control valves, 7 buffer tank pressurization control valves, 8 suction pipe pressurization control valves, 9 buffer tank pressure detection devices, 10 buffer tank liquid level detection devices, 11 buffer tank temperature detection devices, 12, magnesium chloride suction pipes, 13, ladle interfaces, 14, reactor pressure relief control valves, 15 titanium sponge lumps, 16 and a heating and heat preservation device.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples, which are not intended to be limiting.
Example 1: as shown in fig. 1, the liquid level control device of the titanium sponge reactor mainly comprises a titanium sponge reactor 1, a magnesium chloride discharge pipe 2, a magnesium chloride buffer tank 3, an argon gas pressurization control system 4, a buffer tank pressure relief pipeline 5, a reactor pressurization control valve 6, a buffer tank pressurization control valve 7, a suction pipe pressurization control valve 8, a buffer tank pressure detection device 9, a buffer tank liquid level detection device 10, a buffer tank temperature detection device 11, a magnesium chloride suction pipe 12 and a reactor pressure relief control valve 14.
The lower end of the magnesium chloride discharge pipe 2 penetrates into the bottom of the titanium sponge reactor 1, the magnesium chloride discharge pipe 2 is welded and fixed with the inner wall of the reactor, the upper end of the magnesium chloride discharge pipe 2 is rigidly connected with the magnesium chloride buffer tank 3 through a flange, and magnesium chloride at the bottom of the titanium sponge reactor 1 enters the magnesium chloride discharge pipe 2 to be discharged out of the titanium sponge reactor 1 and enters the magnesium chloride buffer tank 2 to be buffered by pressurizing the titanium sponge reactor 1.
The center of the magnesium chloride buffer tank 3 is provided with a submerged pipe serving as a magnesium chloride suction pipe 12 for discharging magnesium chloride, the magnesium chloride suction pipe 12 is inserted into the bottom of the magnesium chloride buffer tank 3, the upper part of the magnesium chloride suction pipe 12 is fixed on the top cover of the magnesium chloride buffer tank 3, a pipe orifice at the upper end of the magnesium chloride suction pipe 12 is used as a ladle interface 13 for being in butt joint with a magnesium chloride conveying ladle to pump the magnesium chloride conveying ladle, and the magnesium chloride in the magnesium chloride buffer tank 3 is sucked into the magnesium chloride conveying ladle through the negative pressure effect.
The argon pressurizing control system 4 is used for supplying argon with certain pressure to the titanium sponge reactor 1, the magnesium chloride buffer tank 3 and the magnesium chloride suction pipe 12 respectively through argon filling pipelines to pressurize, and controlling the opening and closing of pressurizing control valves on the corresponding pipelines. The argon filling pipeline of the argon pressurizing control system 4 is respectively connected with the reactor pressurizing pipeline, the buffer tank pressurizing pipeline and the magnesium chloride suction pipe pressurizing pipeline through four-way joints. The reactor pressurization pipeline is communicated with the reaction cavity of the titanium sponge reactor 1, and a reactor pressurization control valve 6 is arranged; the buffer tank pressurizing pipeline is communicated with the cavity of the magnesium chloride buffer tank 3, and is provided with a buffer tank pressurizing control valve 7; the magnesium chloride suction pipe pressurizing pipeline is communicated with a magnesium chloride suction pipe pressurizing port which is arranged on the magnesium chloride suction pipe 12 and is close to the ladle joint 13, and a suction pipe pressurizing control valve 8 is arranged.
In the process of discharging magnesium chloride from the titanium sponge reactor 1, it is necessary to ensure that the magnesium chloride buffer tank 3 maintains a low-pressure environment, thereby ensuring that magnesium chloride smoothly enters the magnesium chloride buffer tank 3. Therefore, the top cover of the magnesium chloride buffer tank 3 is provided with a buffer tank pressure relief pipeline 5, and a buffer tank pressure relief control valve is installed. After the titanium sponge reactor 1 completes one discharge cycle, the pressure in the reactor needs to be regulated, so a reactor pressure relief pipeline is arranged on the titanium sponge reactor 1, and a reactor pressure relief control valve 14 is arranged on the pipeline.
The top cover of the magnesium chloride buffer tank 3 is provided with a buffer tank pressure detection device 9, the titanium sponge reactor 1 is provided with a reactor pressure detection device, and the pressure detection device adopts a pressure transmitter to monitor the pressures in the magnesium chloride buffer tank 3 and the titanium sponge reactor 1 in real time.
In order to control the fluctuation of the liquid level of the titanium sponge reactor 1, it is necessary to precisely control the discharge amount of magnesium chloride each time, and the discharge amount of magnesium chloride can be indirectly obtained from the change of the liquid level of magnesium chloride in the magnesium chloride buffer tank 3. Therefore, the top cover of the magnesium chloride buffer tank 3 is also provided with a high-temperature radar level gauge as a buffer tank liquid level detection device 10 for measuring the liquid level in the magnesium chloride buffer tank 3 in real time.
In the process that magnesium chloride enters the magnesium chloride buffer tank 3 along the magnesium chloride discharge pipe 2 from the high-temperature titanium sponge reactor 1, if the magnesium chloride solidifies in the magnesium chloride discharge pipe 2, a pipeline is blocked, so that a system is invalid, and therefore, in order to ensure that the magnesium chloride does not cause blockage in the magnesium chloride discharge pipe 2, a heating and heat-preserving device 16 is arranged on a pipe body, which is positioned between the titanium sponge reactor 1 and the magnesium chloride buffer tank 3, on the magnesium chloride discharge pipe 2, so as to ensure that the temperature of the magnesium chloride discharge pipe 2 is not lower than 720 ℃ and ensure the smooth discharge of the magnesium chloride. The same reason is that the heating and heat-preserving device 16 is also arranged outside the magnesium chloride buffer tank 3 to ensure that the temperature of the magnesium chloride buffer tank 3 is not lower than 720 ℃, and the part of the magnesium chloride suction pipe 12, which is exposed out of the magnesium chloride buffer tank 3, is also required to be provided with the heating and heat-preserving device 16 to ensure that the temperature of the pipe body of the section is not lower than 720 ℃, so that the blockage of magnesium chloride is avoided through the arrangement of the heating and heat-preserving devices 16 at multiple positions, and the smooth progress of the reaction of the system is ensured. The heating and heat preserving device 16 comprises an electric heating device and a heat preserving layer. A thermocouple is arranged at the lower part of the tank body of the magnesium chloride buffer tank 3 and used as a buffer tank temperature detection device 11 for monitoring the temperature of the magnesium chloride buffer tank 3 in real time.
Example 2: when the device provided in the embodiment 1 is used for producing the titanium sponge, excessive liquid magnesium is filled in the titanium sponge reactor 1 at one time, the position of the liquid level is measured and recorded, titanium tetrachloride is slowly added in the reduction process to carry out the reduction reaction of the magnesium and the titanium tetrachloride to produce the titanium sponge and the magnesium chloride, the densities of the magnesium chloride and the titanium sponge are larger, the titanium sponge and the magnesium chloride sink to the bottom of the titanium sponge reactor, and a sieve plate is arranged at the bottom of the titanium sponge reactor to separate the titanium sponge and the liquid magnesium chloride. As the reaction proceeds, the reaction level in the reactor increases. When the magnesium chloride at the bottom needs to be discharged, and the reaction liquid level is controlled to fall back, the control of the reaction liquid level can be realized according to the following steps.
1. Discharging stage of the titanium sponge reactor: opening a buffer tank pressure release control valve to ensure that the magnesium chloride buffer tank 3 is at a lower pressure, keeping a ladle interface 13 at the upper end of a magnesium chloride suction pipe 12 in the magnesium chloride buffer tank 3 closed, then opening a reactor pressure control valve 6 by an argon pressure control system 4 to slowly pressurize the titanium sponge reactor 1, discharging magnesium chloride from a magnesium chloride discharge pipe 2 at the bottom in the titanium sponge reactor 1 to the magnesium chloride buffer tank 3, and monitoring the liquid level change in the tank in real time through a buffer tank liquid level detection device 10 to accurately control the magnesium chloride discharge amount; when the liquid level in the magnesium chloride buffer tank 3 reaches a specified amount, the argon pressurizing control system 4 rapidly closes the reactor pressurizing control valve 6, and closes the buffer tank pressure relief control valve; the argon pressurizing control system 4 opens the buffer tank pressurizing control valve 7 to ensure that partial argon is filled in the magnesium chloride buffer tank 3, and reversely presses the magnesium chloride in the titanium sponge reactor 1 to prevent the magnesium chloride from entering the magnesium chloride discharge pipe 2 so as to prevent blockage; and finally, opening the reactor pressure relief control valve 14 to relieve pressure, and closing the reactor pressure relief control valve 14 when the pressure of the titanium sponge reactor 1 is lower than the pressure of the magnesium chloride buffer tank 3 and a certain pressure difference (such as 50-60 kPa) is maintained, so as to complete one magnesium chloride discharging cycle.
And repeating the magnesium chloride discharging cycle for a plurality of times until the liquid level of the magnesium chloride buffer tank 3 rises to the control highest liquid level, and performing the magnesium chloride buffer tank 3 discharging operation.
2. Magnesium chloride buffer tank discharging stage: the ladle interface 13 at the upper end of the magnesium chloride suction pipe 12 on the magnesium chloride buffer tank 3 is in butt joint with a magnesium chloride conveying ladle, smoothness is guaranteed, and then the magnesium chloride in the magnesium chloride buffer tank 3 is sucked to the magnesium chloride conveying ladle by pumping the magnesium chloride conveying ladle; when the magnesium chloride in the magnesium chloride buffer tank 3 is reduced to the minimum liquid level (the pipe orifice at the lower end of the magnesium chloride suction pipe 12 is guaranteed to be in a liquid sealing state under the liquid level), stopping pumping negative of a magnesium chloride conveying ladle, filling argon into the magnesium chloride conveying ladle to keep micro positive pressure, disconnecting the magnesium chloride conveying ladle from the ladle interface 13, and sealing the ladle interface 13 by using a blocking plate; finally, the argon pressurizing control system 4 opens the suction pipe pressurizing control valve 8 to fill argon into the magnesium chloride suction pipe 12, so that the magnesium chloride suction pipe 12 is ensured to be filled with argon, magnesium chloride is prevented from entering, and the magnesium chloride suction pipe 12 is prevented from blocking.
It should be noted that in the magnesium chloride buffer tank discharging stage, the buffer tank pressurization control valve 7 is kept open, so that on one hand, magnesium chloride in the titanium sponge reactor 1 can be prevented from entering the magnesium chloride discharging pipe 2, and on the other hand, the magnesium chloride can be pressurized in the magnesium chloride buffer tank 3, and the magnesium chloride is promoted to enter the magnesium chloride conveying ladle.
By implementing the liquid level control device and the liquid level control method for the titanium sponge reactor, the problems that the liquid level fluctuation is large and the control is difficult in the reduction reaction process of the titanium sponge reactor are solved, meanwhile, the problem of impurity iron content increase caused by abnormal temperature rise of a titanium sponge reaction zone is solved, the amount of low-value wall climbing titanium products is obviously reduced, and the production period in the reduction stage is obviously shortened. Through practical verification, the liquid level in the production process of the titanium sponge can be accurately controlled by the technical method, the fluctuation range of the liquid level is accurately controlled within 50mm, the problem of abnormal temperature of a reaction zone is solved, the generation amount of wall climbing titanium is reduced by 40%, the production period in the reduction stage is shortened by 10h, and the improvement is 11%. Creating 600 ten thousand yuan of economic benefit in a year.
The above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and it should be understood by those skilled in the art that modifications and equivalents may be made to the specific embodiments of the present invention with reference to the above embodiments, and any modifications and equivalents not departing from the spirit and scope of the present invention are within the scope of the claims appended hereto.
Claims (8)
1. The utility model provides a titanium sponge reactor liquid level control device, includes titanium sponge reactor and arranges the magnesium chloride pipe, arranges magnesium chloride pipe one end and stretches into the bottom of titanium sponge reactor, and the other end stretches out titanium sponge reactor, its characterized in that: the device also comprises a magnesium chloride buffer tank and an argon pressurizing control system, wherein magnesium chloride discharged from the titanium sponge reactor through a magnesium chloride discharge pipe enters the magnesium chloride buffer tank for buffering, a magnesium chloride suction pipe for connecting a magnesium chloride conveying ladle is arranged in the magnesium chloride buffer tank, and an orifice at the upper end of the magnesium chloride suction pipe is a ladle interface; the argon pressurizing control system is used for respectively providing argon for the titanium sponge reactor, the magnesium chloride buffer tank and the magnesium chloride suction pipe through pipelines and controlling the opening and closing of pressurizing control valves on the corresponding pipelines; and pressure relief pipelines are respectively arranged on the titanium sponge reactor and the magnesium chloride buffer tank.
2. The titanium sponge reactor liquid level controlling device as claimed in claim 1, wherein: the magnesium chloride buffer tank is provided with a buffer tank pressure detection device, a buffer tank liquid level detection device and a buffer tank temperature detection device.
3. The titanium sponge reactor liquid level controlling device as claimed in claim 2, wherein: the buffer tank pressure detection device and the buffer tank liquid level detection device are arranged at the top of the magnesium chloride buffer tank, and the buffer tank temperature detection device is arranged on the side face of the magnesium chloride buffer tank and corresponds to the buffer area of the magnesium chloride.
4. A titanium sponge reactor liquid level control apparatus as claimed in any one of claims 1 to 3, wherein: the upper part of the titanium sponge reactor is provided with a reactor pressurizing pipe, and the reactor pressurizing pipe is connected with an argon pressurizing control system through a reactor pressurizing control valve; the upper part of the magnesium chloride buffer tank is provided with a buffer tank pressurizing pipe which is connected with an argon pressurizing control system through a buffer tank pressurizing control valve; and a magnesium chloride suction pipe pressurizing port is arranged on the magnesium chloride suction pipe and close to the ladle joint, and is connected with an argon gas pressurizing control system through a suction pipe pressurizing control valve.
5. The titanium sponge reactor liquid level controlling device as claimed in claim 4, wherein: and a heating and heat-preserving device is arranged on the magnesium chloride discharge pipe and positioned between the titanium sponge reactor and the magnesium chloride buffer tank so as to ensure that the temperature of the pipe is not lower than 720 ℃.
6. The titanium sponge reactor liquid level controlling device as claimed in claim 4, wherein: the magnesium chloride buffer tank is provided with a heating and heat preserving device, and the temperature is ensured to be not lower than 720 ℃.
7. A method for controlling the liquid level of a titanium sponge reactor as claimed in any one of claims 1 to 6, wherein the method comprises:
(1) Discharging stage of the titanium sponge reactor: when the liquid level in the titanium sponge reactor rises to a discharge set value or reaches a process requirement discharge period, a buffer tank pressure relief control valve is opened to relieve pressure of the magnesium chloride buffer tank, the mouth of a magnesium chloride suction pipe of the magnesium chloride buffer tank is closed, then a reactor pressurization control valve is opened to slowly pressurize the titanium sponge reactor, and magnesium chloride is discharged from a magnesium chloride discharge pipe in the titanium sponge reactor to the magnesium chloride buffer tank; when the liquid level in the magnesium chloride buffer tank reaches a specified value, closing a reactor pressurization control valve and a buffer tank pressure relief control valve, opening the reactor pressure relief control valve to relieve pressure of the titanium sponge reactor, and closing the reactor pressure relief control valve when the pressure of the titanium sponge reactor is lower than the pressure of the magnesium chloride buffer tank and a certain pressure difference is maintained;
(2) Magnesium chloride buffer tank discharging stage: after repeating the discharging stage of the titanium sponge reactor for a plurality of times, when the liquid level of the magnesium chloride buffer tank rises to the highest liquid level, butting a magnesium chloride suction pipe orifice on the magnesium chloride buffer tank with a magnesium chloride conveying ladle, and sucking the magnesium chloride in the magnesium chloride buffer tank to the magnesium chloride conveying ladle by pumping the magnesium chloride conveying ladle; stopping pumping the magnesium chloride conveying ladle when the magnesium chloride in the magnesium chloride buffer tank is reduced to the minimum liquid level, filling argon into the magnesium chloride conveying ladle to maintain micro-positive pressure, disconnecting the magnesium chloride conveying ladle from the orifice of the magnesium chloride suction pipe, and sealing the orifice of the magnesium chloride suction pipe; finally, the suction tube pressurization control valve is opened to fill the magnesium chloride suction tube with argon.
8. The method for controlling the liquid level of a titanium sponge reactor according to claim 7, wherein the magnesium chloride buffer tank is filled with a part of argon gas after the reactor pressurization control valve and the buffer tank depressurization control valve are closed in the discharging stage of the titanium sponge reactor, so as to prevent magnesium chloride in the titanium sponge reactor from entering the magnesium chloride discharging pipe.
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| JP2001062416A (en) * | 1999-08-31 | 2001-03-13 | Toho Titanium Co Ltd | Clogging removing device for sponge titanium production |
| JP2003306789A (en) * | 2002-04-19 | 2003-10-31 | Sumitomo Titanium Corp | Method and apparatus for manufacturing sponge titanium |
| CN102021352A (en) * | 2011-01-12 | 2011-04-20 | 洛阳双瑞万基钛业有限公司 | Apparatus for preparing high-porosity titanium sponge |
| CN106222453A (en) * | 2016-08-17 | 2016-12-14 | 云南冶金新立钛业有限公司 | Utilize the method that titanium sponge reactor manufactures titanium sponge |
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