A process control method for improving distillation efficiency of titanium sponge production

Abstract

The present invention relates to the technical field of titanium sponge production, specifically to a process control method for improving the distillation efficiency of titanium sponge production, including a reaction device and a condensing device, wherein the reaction device includes a reaction furnace and a reaction cover disposed on the upper end of the reaction furnace, a reactor is installed inside the reaction furnace, a reaction inner sealing ring is fixedly connected to the top of the reactor, a reaction distillation air inlet channel is penetrated through the middle position of the upper surface of the reaction cover, and an argon inlet channel is penetrated through the left side of the upper surface of the reaction cover. The present invention can allow the titanium lump to be heated evenly, and can control the temperature difference between the inside of the titanium lump and the reaction furnace, so as to avoid the problem of low internal temperature and low distillation efficiency of the titanium lump when entering the distillation stage, and by adjusting the initial distillation temperature, heating rate, and pressure difference between the distillation end and the condensation end, rapid distillation can be achieved in the early stage of distillation, while ensuring the smoothness of the distillation aisle and avoiding premature sintering of the titanium lump, which makes it difficult to distill in the later stage of distillation.

Description

Technical Field

[0001] The invention relates to the technical field of titanium sponge production, and in particular to a process control method for improving the distillation efficiency of titanium sponge production. Background Art

[0002] At present, the industrial production of sponge titanium at home and abroad adopts the Klauer process, that is, liquid magnesium is added to a high-temperature reactor, and then titanium tetrachloride is introduced to react with it to obtain sponge titanium and magnesium chloride. After the reduction is completed, the products in the reactor are sponge titanium, magnesium chloride and magnesium, and the magnesium chloride and magnesium are removed by vacuum distillation. At present, in order to reduce production costs, both domestic and foreign equipment are developing towards large-scale, but the increase in furnace type increases the difficulty of distillation. If impurities such as magnesium chloride and magnesium are to be distilled cleanly, the only way is to extend the distillation time. Extending the distillation time increases energy consumption; second, it extends the production cycle, which will affect the output; third, as the distillation time is extended, N, O and Brinell hardness in the titanium lump will also increase. Therefore, the distillation time cannot be extended indefinitely, and can only be shortened by improving the distillation efficiency without affecting the product quality.

[0003] Patent No. CN104357686A discloses a device which is mainly composed of a panel, a hanging ear, an A-shaped plate, and a partition. The A-shaped plate is arranged on the partition, the hanging ear is arranged on the A-shaped plate, and the panel is hung on the hanging ear to form two inclined surfaces. This device fully considers the convenience and safety of later disassembly. The main part of the partition device can be separated from the titanium block by itself after the furnace is dismantled, and only the panel remains on the titanium block. There is no need to use large equipment such as hydraulic jacks for dismantling, and it can be easily removed manually with a pneumatic pick. The present invention has a simple structure and is practical, which can reduce the labor intensity of employees and improve work efficiency and work safety.

[0004] The above patent increases the distillation surface area and improves the distillation efficiency by adding a dividing device in the middle of the titanium lump, dividing the titanium lump into several pieces during the reduction process and the titanium lump forming process. However, this method increases the equipment cost and labor intensity. Secondly, the addition of the dividing device increases the source of impurities introduced into the titanium lump, and the peeling amount needs to be increased during peeling. The peeling is very difficult, which prolongs the overall distillation time. Therefore, a process control method for improving the distillation efficiency of sponge titanium production is provided. Summary of the invention

[0005] In order to overcome the defects in the prior art, the purpose of the present invention is to provide a process control method for improving the distillation efficiency of sponge titanium production, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides a process control method for improving the distillation efficiency of titanium sponge production, comprising a reaction device and a condensation device, comprising the following steps:

[0007] S1. First, the reactor is powered on. In the first step of heat preservation, the temperature inside the reaction furnace is raised to 840°C-860°C for constant temperature insulation. In the second step of heat preservation, the temperature inside the reaction furnace is raised to 890°C-910°C for constant temperature insulation. After the constant temperature is completed, the temperature inside the reaction furnace is further raised to 930°C-970°C. After the temperature is raised, the distillation stage is entered. During the whole heat preservation process, the distillation channel is also heated by the heater, and the heating temperature is controlled between 700°C-900°C.

[0008] S2. After the insulation process is completed, enter the distillation stage 1, control the reaction furnace to heat up to 990℃-1010℃, the heating rate of this stage is 2.6℃ / h-4℃ / h, and the heating time is 15h-20h. During this process, the temperature of the distillation channel is always controlled at 700℃-900℃, and vacuuming is started through the vacuum mechanism in the condensing device, and the vacuum degree at the condensing end is pumped to 1000-1500Pa. When it is lower than 1500Pa, stop vacuuming. When the vacuum degree at the condensing end is higher than 1500Pa, the vacuum unit valve automatically opens to vacuumize. This stage lasts for 15-20h;

[0009] S3, then the temperature is controlled again, entering the second distillation stage, the reaction furnace temperature is raised from 990℃-1010℃ to 1020℃-1030℃, in this heating stage, the heating rate is controlled at 1.4℃ / h-2.4℃ / h, the heating time is 10h-15h, during this process, the distillation channel temperature is always controlled at 700℃-900℃, and the vacuum unit valve of the condensing device is opened, the vacuum degree at the condensing end is pumped to 50-100Pa, and when it is lower than 100Pa, the vacuum pumping is stopped. When the vacuum degree at the condensing end is higher than 100Pa, the vacuum unit valve is automatically opened for vacuum pumping, and this stage lasts for 10-15h;

[0010] S4, then, the temperature is controlled again to enter the distillation stage three, the reaction furnace temperature is controlled to rise from 1020℃-1030℃ to 1040℃-1050℃, in this heating stage, the heating rate is controlled at 1℃ / h-1.3℃ / h, the heating time is 15h-20h, after the temperature rises to 1040℃-1050℃, constant temperature distillation is performed until the distillation is completed, the distillation channel temperature is always controlled at 700℃-900℃, the vacuum unit valve is always open, within 3h, the vacuum degree at the condensation end must be pumped to below 15Pa, and the distillation can be completed after 80-90h of distillation;

[0011] S5. Finally, after the distillation is completed, argon is filled into the interior through the argon filling device until positive pressure is reached, and the furnace is taken out and cooled;

[0012] The above steps cooperate with the reaction device, the condensation device and the distillation channel to complete the process control method for improving the distillation efficiency of sponge titanium production;

[0013] The reaction device comprises a reaction furnace and a reaction upper cover arranged on the upper end of the reaction furnace, a reactor is installed inside the reaction furnace, and a reaction inner sealing ring is fixedly connected to the top of the reactor;

[0014] A reaction distillation air inlet channel runs through the middle of the upper surface of the reaction cover, an argon inlet channel runs through the left side of the upper surface of the reaction cover, a reaction outer sealing ring is welded to the outermost part of the lower surface of the reaction cover, an argon inflator is installed on the top of the argon inlet channel, a reaction distillation connecting flange is installed on the top of the reaction distillation air inlet channel, and a reaction distillation valve is installed at the lower end of the reaction distillation air inlet channel.

[0015] As a further improvement of the present technical solution, the condensing device includes a condensing furnace, a condensing upper cover installed on the top of the condensing furnace, and a vacuum mechanism arranged on the right side of the condensing furnace. A condenser is installed inside the condensing furnace, a condensing inner sealing ring is fixedly installed on the top of the condenser, and a cooling device is installed at the upper end between the outer surface of the condenser and the inner surface of the condensing furnace.

[0016] As a further improvement of the present technical solution, a condensation and distillation air inlet channel runs through the middle position of the upper surface of the condensation upper cover, a vacuum tube runs through the right side of the upper surface of the condensation upper cover, a condensation outer sealing ring is welded on the outer side of the lower surface of the condensation upper cover, a condensation and distillation connecting flange is installed on the top of the condensation and distillation air inlet channel, and a condensation and distillation valve is installed at the lower end of the condensation and distillation air inlet channel.

[0017] As a further improvement of the present technical solution, the vacuum mechanism includes a vacuum unit, a vacuum air supply pipe installed at the top of the vacuum unit, and a vacuum unit valve installed at the other end of the vacuum air supply pipe.

[0018] As a further improvement of the technical solution, a reaction flange is installed at the left end of the distillation channel, a condensation flange is installed at the right end of the distillation channel, and a plurality of heaters are installed at the middle position of the outer surface of the distillation channel.

[0019] As a further improvement of the technical solution, during the insulation stage, the temperature of the reaction furnace is increased from 700℃-780℃ to 840℃-860℃ in 1h-2h; the temperature of the reaction furnace is increased from 840℃-860℃ to 890℃-910℃ in 1.5h-2.5h; the temperature of the reaction furnace is increased from 890℃-910℃ to 930℃-970℃ in 2h-3h, the first insulation step lasts for 1-2h, and the second insulation step lasts for 3-4h.

[0020] As a further improvement of the technical solution, during the distillation stage one, the distillation stage two and the distillation stage three, the heating time and the holding time of the vacuum degree at the condensation end of the reaction furnace are consistent in their respective stages.

[0021] As a further improvement of the technical solution, the reaction furnace is heated at a uniform speed in the same small stage during the insulation stage and the overall distillation stage. The heating rates are different in different small stages. The higher the distillation temperature, the slower the heating rate.

[0022] As a further improvement of the technical solution, the heater of the distillation channel is set to automatically heat when the temperature is lower than 700°C and automatically stop heating when the temperature is higher than 850°C.

[0023] As a further improvement of the technical solution, the process control method is suitable for process production of furnace types of 7.5t-8.5t, and the cooling device uses an evaporative refrigerator.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. The process control method for improving the distillation efficiency of sponge titanium production adds two insulation stages in the process of heating the reaction furnace to the initial distillation temperature, which can make the titanium lump evenly heated and control the temperature difference between the inside of the titanium lump and the reaction furnace, avoiding the problem of low internal temperature of the titanium lump and low distillation efficiency when entering the distillation stage.

[0026] 2. The process control method for improving the distillation efficiency of sponge titanium production controls the reaction furnace temperature at 930°C-970°C, which can increase the volatilization rate of magnesium chloride and magnesium, thereby increasing the distillation rate in the initial stage of distillation.

[0027] 3. The process control method for improving the distillation efficiency of sponge titanium production is divided into three heating stages: the temperature of the reaction furnace is increased from 930℃-970℃ to 1040-1050℃, the heating rate of stage one is the fastest, stage two is the second fastest, and stage three is the slowest. The distillation rate in the initial stage of distillation can be increased. The higher the temperature, the lower the heating rate, which can avoid high-temperature sintering of titanium lumps, resulting in difficulty in distilling magnesium chloride and magnesium in the later stage of distillation.

[0028] 4. The process control method for improving the distillation efficiency of sponge titanium production, during the distillation stage, pressure control is divided into three stages. The distillation rate is adjusted by controlling the pressure difference between the condensation end and the distillation end to achieve rapid distillation while avoiding blockage of the distillation aisle due to excessive distillation in the early stage of distillation.

[0029] 5. The process control method for improving the distillation efficiency of sponge titanium production synchronizes the three stages of temperature control and pressure control. By adjusting the initial distillation temperature, heating rate, and pressure difference between the distillation end and the condensation end, rapid distillation can be achieved in the early stage of distillation while ensuring the smooth flow of the distillation aisle and avoiding premature sintering of titanium lumps that makes distillation difficult in the later stage of distillation, thereby achieving the purpose of shortening the distillation time without affecting product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the teachings of the present invention.

[0031] Figure 1 It is a schematic diagram of the overall assembly structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the structure of the reaction device of the present invention;

[0033] Figure 3 It is a schematic diagram of the reaction furnace structure of the present invention;

[0034] Figure 4 is a cross-sectional view of the reaction cover of the present invention;

[0035] Figure 5 It is a schematic diagram of the structure of the condensing device of the present invention;

[0036] Figure 6 It is a schematic diagram of the condensing furnace structure of the present invention;

[0037] Figure 7 It is a cross-sectional view of the condensation upper cover of the present invention;

[0038] Figure 8 It is a schematic diagram of the vacuum mechanism structure of the present invention;

[0039] Fig. 9 It is a schematic diagram of the distillation channel structure of the present invention;

[0040] The meaning of each number in the figure is:

[0041] 1. Reaction device; 11. Reaction furnace; 111. Reactor; 112. Reaction inner sealing ring; 12. Reaction upper cover; 121. Argon inflator; 122. Argon inlet channel; 123. Reaction outer sealing ring; 124. Reaction distillation valve; 125. Reaction distillation air inlet channel; 126. Reaction distillation connecting flange;

[0042] 2. Condensation device; 21. Condensation furnace; 211. Cooling device; 212. Condenser; 213. Condensation inner sealing ring; 22. Condensation upper cover; 221. Condensation outer sealing ring; 222. Condensation distillation valve; 223. Condensation distillation air inlet channel; 224. Condensation distillation connecting flange; 225. Vacuum tube; 23. Vacuum mechanism; 231. Vacuum unit; 232. Vacuum air supply pipe; 233. Vacuum unit valve;

[0043] 3. Distillation channel; 31. Reaction flange; 32. Heater; 33. Condensation flange. DETAILED DESCRIPTION

[0044] The details of the present invention can be more clearly understood by combining the accompanying drawings with the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be regarded as falling within the scope of the present invention. The terms "installation" and "connection" should be understood in a broad sense, which can be directly connected or indirectly connected through an intermediate medium.

[0045] The terms "central axis", "vertical", "horizontal", "front", "back", "up", "down", "left", "right", "top", "bottom", "inside", "outside" and the like used herein to indicate positions or positional relationships are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, in the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0046] See also Figure 1-Figure 9 As shown, the present invention provides a process control method for improving the distillation efficiency of titanium sponge production, comprising a reaction device 1 and a condensation device 2, and comprising the following steps:

[0047] S1. First, the reactor 111 is powered on. In the first step of heat preservation, the temperature inside the reaction furnace 11 is raised to 840°C-860°C for constant temperature insulation. In the second step of heat preservation, the temperature inside the reaction furnace 11 is raised to 890°C-910°C for constant temperature insulation. After the constant temperature is completed, the temperature inside the reaction furnace 11 is further raised to 930°C-970°C. After the temperature is raised, the distillation stage is entered. During the whole heat preservation process, the distillation channel 3 is also heated by the heater 32, and the heating temperature is controlled between 700°C-900°C.

[0048] S2, after the insulation process is completed, enter the distillation stage 1, control the reaction furnace 11 to heat up to 990℃-1010℃, the heating rate of this stage is 2.6℃ / h-4℃ / h, and the heating time is 15h-20h. During this process, the temperature of the distillation channel 3 is always controlled at 700℃-900℃, and vacuuming is started through the vacuum mechanism 23 in the condensing device 2, and the vacuum degree at the condensing end is pumped to 1000-1500Pa. When it is lower than 1500Pa, stop vacuuming. When the vacuum degree at the condensing end is higher than 1500Pa, the vacuum unit valve 233 automatically opens for vacuuming. This stage lasts for 15-20h;

[0049] S3, then the temperature is controlled again, entering the second distillation stage, the temperature of the reaction furnace 11 is heated from 990°C-1010°C to 1020°C-1030°C, in this heating stage, the heating rate is controlled at 1.4°C / h-2.4°C / h, the heating time is 10h-15h, during this process, the temperature of the distillation channel 3 is always controlled at 700°C-900°C, and the vacuum unit valve 233 of the condensing device 2 is opened, the vacuum degree at the condensing end is pumped to 50-100Pa, and when it is lower than 100Pa, the vacuum pumping is stopped. When the vacuum degree at the condensing end is higher than 100Pa, the vacuum unit valve 233 is automatically opened for vacuum pumping, and this stage lasts for 10-15h;

[0050] S4, then, the temperature is controlled again to enter the distillation stage three, the temperature of the reaction furnace 11 is controlled to rise from 1020°C-1030°C to 1040°C-1050°C, in this heating stage, the heating rate is controlled at 1°C / h-1.3°C / h, the heating time is 15h-20h, after the temperature is raised to 1040°C-1050°C, constant temperature distillation is performed until the distillation is completed, the temperature of the distillation channel 3 is always controlled at 700°C-900°C, the vacuum unit valve 233 is always open, within 3h, the vacuum degree at the condensation end must be evacuated to below 15Pa, and the distillation can be completed after 80-90h of distillation;

[0051] S5. Finally, after the distillation is completed, argon is filled into the interior through the argon filling device 121 until the positive pressure reaches 20-35 kPa, and the furnace is taken out and cooled;

[0052] The above steps cooperate with the reaction device 1, the condensation device 2 and the distillation channel 3 to complete the process control method for improving the distillation efficiency of sponge titanium production;

[0053] The reaction device 1 comprises a reaction furnace 11 and a reaction upper cover 12 which is arranged on the upper end of the reaction furnace 11. A reactor 111 is installed inside the reaction furnace 11. A reaction inner sealing ring 112 is fixedly connected to the top of the reactor 111.

[0054] A reaction distillation air inlet channel 125 passes through the middle position of the upper surface of the reaction upper cover 12, an argon inlet channel 122 passes through the left side of the upper surface of the reaction upper cover 12, a reaction outer sealing ring 123 is welded to the outermost part of the lower surface of the reaction upper cover 12, an argon inflator 121 is installed on the top of the argon inlet channel 122, a reaction distillation connecting flange 126 is installed on the top of the reaction distillation air inlet channel 125, and a reaction distillation valve 124 is installed at the lower end of the reaction distillation air inlet channel 125.

[0055] Specifically, the condensing device 2 includes a condensing furnace 21, a condensing upper cover 22 installed on the top of the condensing furnace 21, and a vacuum mechanism 23 arranged on the right side of the condensing furnace 21. A condenser 212 is installed inside the condensing furnace 21, and a condensing inner sealing ring 213 is fixedly installed on the top of the condenser 212. A cooling device 211 is installed at the upper end between the outer surface of the condenser 212 and the inner surface of the condensing furnace 21. The cooling device 211 is close to the outer surface of the condenser 212 to prevent and reduce transmission loss.

[0056] Furthermore, a condensation and distillation air inlet channel 223 runs through the middle position of the upper surface of the condensation upper cover 22, a vacuum tube 225 runs through the right side of the upper surface of the condensation upper cover 22, a condensation outer sealing ring 221 is welded to the outer side of the lower surface of the condensation upper cover 22, a condensation and distillation connecting flange 224 is installed at the top of the condensation and distillation air inlet channel 223, and a condensation and distillation valve 222 is installed at the lower end of the condensation and distillation air inlet channel 223, which can be controlled as needed through the valve.

[0057] Specifically, the vacuum mechanism 23 includes a vacuum unit 231, a vacuum air supply pipe 232 installed at the top of the vacuum unit 231, and a vacuum unit valve 233 installed at the other end of the vacuum air supply pipe 232. The vacuum unit valve 233 can be used to conveniently control when to vacuumize the vacuum unit 231.

[0058] In addition, a reaction flange 31 is installed at the left end of the distillation channel 3, a condensation flange 33 is installed at the right end of the distillation channel 3, and a plurality of heaters 32 are installed in the middle of the outer surface of the distillation channel 3 to heat the gas passing through the distillation channel 3.

[0059] Furthermore, during the insulation stage of the reaction furnace 11, the temperature of the reaction furnace 11 is increased from 700℃-780℃ to 840℃-860℃ in 1h-2h; the temperature of the reaction furnace 11 is increased from 840℃-860℃ to 890℃-910℃ in 1.5h-2.5h; the temperature of the reaction furnace 11 is increased from 890℃-910℃ to 930℃-970℃ in 2h-3h. The first insulation step lasts for 1-2h, and the second insulation step lasts for 3-4h. The insulation stage can make the titanium lump heated evenly, and the temperature difference between the inside of the titanium lump and the reaction furnace 11 can be controlled, thereby avoiding the problem of low internal temperature of the titanium lump and low distillation efficiency when entering the distillation stage.

[0060] Specifically, during the distillation stage one, the distillation stage two and the distillation stage three of the reaction furnace 11, the heating time and the holding time of the vacuum degree at the condensation end are consistent in their respective stages, so as to achieve rapid distillation in the early stage of distillation, ensure the smooth flow of the distillation aisle, and avoid premature sintering of titanium lumps that makes distillation difficult in the later stage of distillation, thereby achieving the purpose of shortening the distillation time without affecting the product quality.

[0061] It is worth noting that, during the insulation stage and the overall process of the distillation stage, the reaction furnace 11 heats up at a uniform speed within the same small stage. The heating rates are different in different small stages. The higher the distillation temperature, the slower the heating rate. The heating rate in stage one is the fastest, followed by stage two, and the slowest in stage three. This can increase the distillation rate in the early stage of distillation. The higher the temperature, the lower the heating rate, which can avoid high-temperature sintering of titanium lumps, resulting in difficulty in distilling magnesium chloride and magnesium in the later stage of distillation.

[0062] Furthermore, the heater 32 of the distillation channel 3 is set to automatically heat when the temperature is lower than 700°C and automatically stop heating when the temperature is higher than 850°C, which can ensure that the temperature in the distillation channel 3 is maintained at 700°C-900°C.

[0063] Furthermore, the process control method is applicable to the process production of furnace types of 7.5t-8.5t. The cooling device 211 uses an evaporative refrigerator, which is energy-saving, environmentally friendly and has high cooling efficiency.

[0064] It is worth mentioning that the structures and working principles of the argon inflator 121, valve, cooling device 211, vacuum unit 231 and heater 32 involved in this embodiment are well known to those skilled in the art and will not be elaborated here.

[0065] It should be noted that the above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A process control method for improving the distillation efficiency of titanium sponge production, using a reaction device (1) and a condensation device (2) for distillation, comprising the following steps: S1. First, power is supplied to the reactor (111). In the first insulation step, the temperature inside the reaction furnace (11) is raised to 840°C-860°C for constant temperature insulation. In the second insulation step, the temperature inside the reaction furnace (11) is raised to 890°C-910°C for constant temperature insulation. After the constant temperature is completed, the temperature inside the reaction furnace (11) is further raised to 930°C-970°C. After the temperature is raised, the distillation stage is entered. During the entire insulation process, the distillation channel (3) is also heated by the heater (32) throughout the entire process, and the heating temperature is controlled between 700°C and 900°C. It is characterized in that after S2, the heat preservation process is completed, the distillation stage 1 is entered, the reaction furnace (11) is controlled to heat up to 990°C-1010°C, the heating rate of this stage is 2.6°C / h-4°C / h, and the heating time is 15h-20h. During this process, the temperature of the distillation channel (3) is always controlled at 700°C-900°C, and vacuuming is started through the vacuum mechanism (23) in the condensing device (2), and the vacuum degree at the condensing end is pumped to 1000-1500Pa. When it is lower than 1500Pa, the vacuuming is stopped. When the vacuum degree at the condensing end is higher than 1500Pa, the vacuum unit valve (233) automatically opens for vacuuming. This stage lasts for 15-20h; S3, then the temperature is controlled again to enter the second distillation stage, and the temperature of the reaction furnace (11) is increased from 990°C-1010°C to 1020°C-1030°C. In this heating stage, the heating rate is controlled at 1.4°C / h-2.4°C / h, and the heating time is 10h-15h. During this process, the temperature of the distillation channel (3) is always controlled at 700°C-900°C, and the vacuum unit valve (233) of the condensing device (2) is opened, and the vacuum degree at the condensing end is pumped to 50-100Pa. When it is lower than 100Pa, the vacuum pumping is stopped. When the vacuum degree at the condensing end is higher than 100Pa, the vacuum unit valve (233) is automatically opened to pump vacuum. This stage lasts for 10-15h; S4, then, the temperature is controlled again to enter the distillation stage three, and the temperature of the reaction furnace (11) is controlled to rise from 1020°C-1030°C to 1040°C-1050°C. In this heating stage, the heating rate is controlled at 1°C / h-1.3°C / h, and the heating time is 15h-20h. After the temperature reaches 1040°C-1050°C, constant temperature distillation is performed until the distillation is completed. The temperature of the distillation channel (3) is always controlled at 700°C-900°C, and the vacuum unit valve (233) is always open. Within 3 hours, the vacuum degree at the condensation end must be evacuated to below 15Pa. The distillation can be completed after distillation for 80-90 hours. S5. Finally, after the distillation is completed, argon is filled into the interior through the argon filling device (121) until positive pressure (20-35 kPa), and then the furnace is taken out and cooled; The above steps cooperate with the reaction device (1), the condensation device (2) and the distillation channel (3) to complete the process control method for improving the distillation efficiency of sponge titanium production; The reaction device (1) comprises a reaction furnace (11) and a reaction upper cover (12) arranged on the upper end of the reaction furnace (11); a reactor (111) is installed inside the reaction furnace (11); and a reaction inner sealing ring (112) is fixedly connected to the top of the reactor (111); A reaction distillation air inlet channel (125) is passed through the middle of the upper surface of the reaction upper cover (12), an argon inlet channel (122) is passed through the left side of the upper surface of the reaction upper cover (12), a reaction outer sealing ring (123) is welded to the outermost part of the lower surface of the reaction upper cover (12), an argon inflator (121) is installed at the top of the argon inlet channel (122), a reaction distillation connecting flange (126) is installed at the top of the reaction distillation air inlet channel (125), and a reaction distillation valve (124) is installed at the lower end of the reaction distillation air inlet channel (125).

2. The process control method for improving the distillation efficiency of titanium sponge production according to claim 1, characterized in that: The condensing device (2) comprises a condensing furnace (21), a condensing upper cover (22) installed at the top of the condensing furnace (21), and a vacuum mechanism (23) arranged on the right side of the condensing furnace (21); a condenser (212) is installed inside the condensing furnace (21); a condensing inner sealing ring (213) is fixedly installed at the top of the condenser (212); and a cooling device (211) is installed at the upper end between the outer surface of the condenser (212) and the inner surface of the condensing furnace (21).

3. The process control method for improving the distillation efficiency of titanium sponge production according to claim 2, characterized in that: A condensation and distillation air inlet channel (223) passes through the middle position of the upper surface of the condensation upper cover (22), a vacuum tube (225) passes through the right side of the upper surface of the condensation upper cover (22), a condensation outer sealing ring (221) is welded to the outer side of the lower surface of the condensation upper cover (22), a condensation and distillation connecting flange (224) is installed at the top of the condensation and distillation air inlet channel (223), and a condensation and distillation valve (222) is installed at the lower end of the condensation and distillation air inlet channel (223).

4. The process control method for improving the distillation efficiency of titanium sponge production according to claim 1, characterized in that: The vacuum mechanism (23) comprises a vacuum unit (231), a vacuum air supply pipe (232) installed at the top end of the vacuum unit (231), and a vacuum unit valve (233) installed at the other end of the vacuum air supply pipe (232).

5. The process control method for improving the distillation efficiency of titanium sponge production according to claim 1, characterized in that: A reaction flange (31) is installed at the left end of the distillation channel (3), a condensation flange (33) is installed at the right end of the distillation channel (3), and a plurality of heaters (32) are installed at the middle position of the outer surface of the distillation channel (3).

6. The process control method for improving the distillation efficiency of titanium sponge production according to claim 1, characterized in that: During the heat preservation stage of the reaction furnace (11), the temperature of the reaction furnace (11) is increased from 700°C-780°C to 840°C-860°C in 1h-2h; the temperature of the reaction furnace (11) is increased from 840°C-860°C to 890°C-910°C in 1.5h-2.5h; and the temperature of the reaction furnace (11) is increased from 890°C-910°C to 930°C-970°C in 2h-3h. The first heat preservation step lasts for 1-2h, and the second heat preservation step lasts for 3-4h.

7. The process control method for improving the distillation efficiency of titanium sponge production according to claim 1, characterized in that: During the distillation stage one, the distillation stage two and the distillation stage three of the reaction furnace (11), the heating time and the time for maintaining the vacuum degree at the condensation end are consistent in each stage.

8. The process control method for improving the distillation efficiency of titanium sponge production according to claim 1, characterized in that: During the heat preservation stage and the whole distillation stage, the reaction furnace (11) is heated at a uniform speed in the same small stage, and the heating rates are different in different small stages. The higher the distillation temperature, the slower the heating rate.

9. The process control method for improving the distillation efficiency of titanium sponge production according to claim 1, characterized in that: The heater (32) of the distillation channel (3) is set to automatically heat when the temperature is lower than 700°C, and automatically stop heating when the temperature is higher than 850°C.

10. The process control method for improving the distillation efficiency of titanium sponge production according to claim 2, characterized in that: The process control method is applicable to process production of furnace types of 7.5t-8.5t, and the cooling device (211) uses an evaporative refrigerator.

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