Device for vacuum separation of titanium sponge
(57) Abstract:The invention relates to ferrous metallurgy, in particular to devices for cleaning sponge titanium vacuum separation. The invention improves the performance of the device. For this purpose, the device of the vacuum separation, including retort reactor, the retort-condenser with a false bottom, a nozzle for discharging the melt, leak-proof lid with fittings for vacuum, Central pipe, within which is placed coaxially with the inner ring nozzle hosting fusible plug, valve actuator, on the Central inlet side posted by side socket through which hermetically passes the valve actuator. The device is provided with a device for heating pipes, water-cooled flanges placed at the ends of the Central pipe. On the flanges of the caps installed anchor device in the form of a rack. The retort-condenser is cooled by water from the cooler with the irrigation ring and hatches. The discharge device of the retort reactor equipped with a vacuum cap and the outlet of the retort-condenser - vacuum drainage. 3 C.p. f-crystals, 1 Il. The invention relates to ferrous metallurgy, in particular atorney fuming.A device for vacuum separation of titanium sponge (kN. The Titan. - edited Harmacy C. A.-M.: metallurgy. -1983. - S. 372-379, 409-414), consisting of a retort-reactor with an airtight lid, which hosted the Central pipe, the retort-condenser, a closed sealed cover with a Central pipe and is equipped with a sprinkler, heat shield and fusible plug.The disadvantages of this device are low productivity, high energy consumption and low quality sponge titanium. These shortcomings caused by the fact that before disassembling apparatus of the vacuum separation cooled in the refrigerator for almost two days, resulting in significant expenses.A device for vacuum separation of titanium sponge (RF patent N 2064517, publ. B 21, 1996), consisting of a retort reactor and the retort-condenser chiller-fill, fusible plug and heat shield. The retort reactor and the retort-condenser equipped with recessed lids, each lid is placed Central tube, hermetically embedded in the Central hole of the lid of the retort reactor and provided with a device for heating the Central pipe camera entral socket.The disadvantage of this device is not a high performance device, as when dismantling the device in a hot condition does not overlap the holes in the lid of the retort reactor and the retort-condenser. So hot retort gets air, which oxidizes the titanium sponge and condensate. In addition, in the apparatus of the lower chlorides of titanium light up and can cause fire sponge titanium. This will require additional sealing of the retort reactor and an additional supply of argon to stop the burning, which reduces the device performance and the quality of titanium sponge.A device for vacuum cleaning sponge titanium - prototype (patent EPO N 097135, publ. 26.12.83), including the camera (device recovery) with a cylindrical reactor and sealed. The cover is made Luggage cylindrical shape with a height of 1.5-2.6 m and an inner diameter of 1-1,3 m, elongated along the vertical axis of the reactor with a hole in the bottom and is equipped with nozzles for connection with the steam and vacuum. The camera is placed a valve for outputting the vapor of magnesium and magnesium chloride from the reactor recovery. Cover has gisovu is the possibility of moving vertically to supply magnesium and chloride recoverable metal. The pipe is surrounded by a sheath, which moves together with the tube to regulate the size of the hole in the lid. Using heated steam Luggage recovery and evaporation are connected to the camera condensation cooled chiller (shirt), filled with water. Layout of the retort-condenser on the retort reactor without steam line and side of the capacitor is also provided in the patent, and the present version of the drawing.The disadvantage of this device is the low performance of the device due to the time consuming process that takes about 10 days. In addition, there is the possibility that stops the device by deposition in the steam line of the magnesium and magnesium chloride. The Assembly and disassembly of the device are also long, and it is not possible to improve the performance of the device as a whole. For the option with overhead condenser this device does not allow the dismantling of the device after the restore process, the installation of the device the vacuum separation and removal in a hot condition, which increases the employment of the furnace and thereby reduces the performance of the device.The objective of the invention is to increase the Oia units), reduce employment furnace.This task is solved in that the device for vacuum separation of titanium sponge, consisting of a retort-reactor with a false bottom, a closed sealed cover with a Central pipe, which is placed retort-condenser-sealed cover with a Central pipe fitted with a valve, a device for heating the Central pipe, cooler and fusible plug, what's new is that it is further provided with an inner pipe mounted coaxially to the Central pipe retort reactor and the retort-condenser and welded by means of the ring inside the main pipe at a certain distance, hosts the valve and fusible plug, and a lateral pipe, rigidly attached to the Central pipe, which is hermetically placed the valve actuator can be rotated; and a water-cooled flange connection, welded to the main pipe.In addition, it is further provided with a support device is placed on the flanges of the cover and is made in the form of racks.In addition, the diameter of the inner pipe equivalent to 0.5-0.7 of the diameter of the Central pipe.In addition to their devices vacuum separation of the inner pipe, mounted coaxially with the Central pipe, welded by means of the ring at a distance of 100-150 mm from the top of the Central pipe and a diameter of 0.5-0.7 diameter of the Central pipe, allows you to mount therein a valve and fusible plug after the process of recovery without cooling apparatus that can reduce the time of installation of the device and improve the performance of the device.The presence of a lateral pipe, rigidly welded to the Central tube, allows tight to accommodate the valve actuator and to carry out the closing of the valve in a hot state after the separation process, and also reduces the time of disassembly of the device separation.Water-cooled flanges placed at the ends of the Central pipe, allow sealing of the retort reactor and the retort-condenser, thereby reducing the ingress of air during the process of separation of titanium sponge, quick Assembly and disassembly of the apparatus, thereby enhancing the device performance.The device shown in the drawing. The device consists of a retort reactor 1, the retort-condenser 2, false bottoms 3, the nozzles of the discharge device 4, recessed lids 5 vnutrenniy pipe 9 in diameter, equivalent to 0.5-0.7 of the diameter of the Central pipe 7 that hosts fusible plug 10 and the shutter valve 11 with the actuator 12, is made to rotate around the axis and passing through the side pipe 13, which is welded to the side surface of the Central pipe 7 at an angle of 90othe Central pipe 7 provided with a device for heating 14 and a water-cooled flange connection 15 retort reactor 1, which is tightly connected with the same flange connection 15 of the Central pipe 7 of the retort-condenser 8. On the flange 16 of the cover 5 is installed a support device made in the form of racks 17. The retort-condenser 2 is equipped with a cooler 18 with the irrigation ring 19 and hatches 20. The nozzle 4 of the discharge device of the retort reactor 1 equipped with a vacuum cap 21, and the nozzle 4 of the discharge device of the retort-condenser 2 - vacuumation 22.The device operates as follows.Previously in the manufacture of the device produced by the major sites, in particular in the Central pipe 7 of the cover 5 by means of the ring 8 are welded inner pipe 9 with a diameter of 0.5-0.7 diameter of the Central pipe at a distance equal to 100-150 mm from the top of the Central pipe to the upper hole of the Central Committee 13. Assemble the apparatus and recovery by known techniques carry out the recovery process. After carrying out the separation process at the site recovery disassemble the unit to supply of titanium tetrachloride and mounted on the inner pipe 9 fusible plug 10, the gate valve 11 with the actuator 12, which is installed in the side pipe 13, the output of the drive 12 of the valve seal cap with gasket of rubber vacuum. The actuator 12 is set in the status "open". On the cover 5 around the Central pipe 7 establish and fix the device for heating 14 made in the form of an electric furnace with a capacity of 10-15 kW, comprising a casing of steel 3, the lining of SLB-1.0, channels in the lining for the pipe 13 of the actuator 12 of the valve 11 at the junction of the valves of the furnace. The heater of nichrome brand x2-n, with a diameter of 7-8 mm, a length of 10-15 m Powered furnace perform from the transformer, such as the brand neo-250. Apparatus for vacuum separation has two such furnaces for Central nozzle 7 of the retort reactor 1 and the retort-condenser 2. Disassemble the drive of the discharge device, setting on the nozzle 4 of the discharge device of the retort reactor 1 vacuum cap 21. The retort reactor 1 is installed in the furnace.On the mounting section is mortu capacitor 2 install the cooler 18 with the irrigation ring 19 and hatches 20.To the flange 16 of the cover 5 is fixed to the flange with the racks 17 with bolted connections. The retort-condenser 2 is set on the retort reactor 1 with screws support device 17, adjusting to each other, the flanges 15 of the Central pipe 7. Then seal and using a water-cooled flange perform cooling of the flanges 15.The retort reactor 1 with the reaction mass, consisting of 6 tons of titanium sponge, 2 tons of magnesium chloride and 4 tons of unreacted magnesium, seal, vacuum, Central heat pipes using the device for heating 14 to a temperature of 750oC, and the retort reactor 1 is to a temperature of 1000oC.In irrigation ring 19 serves water for 20 hours for cooling the retort-condenser 2, cooling the retort-condenser to a temperature of 100-300oC.When heated retort reactor 1, the Central pipe 7 and the inner pipe 9 fusible plug 17 is melted and begins sublimation of magnesium chloride and magnesium from the reaction mass, settling on the cooled walls of the retort-condenser 2. After 20 hours of irrigation water supply off, open the hatches 20 and the cooling of the retort-condenser 2 continue using natural earlyearly and by the leakage in the apparatus. Then turn off the heating of the retort reactor 1, the device for heating 17 Central pipe 7 and the inner pipe 9. In the apparatus set argon, close the bore of the inner pipe 9 via gate 11 of the valve by turning the actuator 12 90oto avoid falling into the retort reactor 1 and in the retort-condenser 2 air. Support device 17 is removed, put on the pipes 7 plugs. The retort-condenser is removed and transferred to the mounting section, and the retort reactor 1 is installed in the refrigerator. The obtained titanium sponge is removed from the retort reactor after cooling, and the retort-condenser 2 is used again in the process of recovery.Thus, this device can significantly improve the device performance vacuum separation by reducing the time of mounting and Dismounting apparatus, reduce the time of use of the vacuum separation for the cycle. 1. Device for vacuum separation of titanium sponge, consisting of a retort-reactor with a false bottom, a closed sealed cover with a Central pipe that hosts the retort-condenser-sealed cover with a Central pipe fitted with a valve, the us is about further provided with an inner pipe, mounted coaxially with the Central pipe and welded with rings inside the main pipe at a certain distance, which houses a fusible plug and the valve, and a lateral pipe, rigidly attached to the Central pipe, which is hermetically placed the valve actuator can be rotated, and a water-cooled flange connection, welded to the main pipe.2. The device under item 1, characterized in that it is further provided with a support device is placed on the flanges of the cover and is made in the form of racks.3. The device under item 1, characterized in that the diameter of the inner pipe equivalent to 0.5 - 0.7 of the diameter of the Central pipe.4. The device under item 1, characterized in that the ring inner pipe is placed in the Central pipe at a distance of 100 - 150 mm from the top of the Central pipe.
FIELD: metallurgy; reworking wastes of alumina production process.
SUBSTANCE: proposed method includes preparation of batch of charge containing red mud and carbon reductant, heating the charge in melting unit to solid-phase iron reduction temperature, three-phase reduction of ferric oxides in charge by carbon reductant and saturation of iron with carbon in charge thus prepared, melting the reduced charge for obtaining metal phase in form of cast iron and slag phase in form of primary slag, separation of cast iron from primary slag in melt heated to temperature of 40 C, reduction of silicon and titanium from oxides contained in primary slag by aluminum and removal of cast iron and primary slag from melting unit; during preparation of charge, concentrate of titanomagnetite ore containing titanium oxide in the amount from 1 to 15% is added to red mud; besides that, additional amount of carbon reductant and additives are introduced; after separation of primary slag from cast iron in melting unit, cast iron is heated to 1500-1550 C and product containing ferric oxide is added to it; iron is reduced by carbon of cast iron for converting the cast iron into steel at obtaining secondary slag; main portion of steel is removed from melting unit, secondary slag is added to primary slag and silicon and titanium are converted into steel residue in melting unit by reduction with aluminum, thus obtaining final slag-saturated slag and master alloy containing iron, titanium and silicon; main portion of master alloy is removed from melting unit; after removal of final slag for converting the master alloy residue to steel in melting unit, titanium and silicon are converted into slag phase by oxidation and next portion of charge is fed to slag phase formed after converting the master alloy residue to steel. Proposed method ensures high efficiency due to obtaining iron-titanium silicon master alloy in form of independent product and production of alumina from high-alumina final slag or high-alumina cement and concentrate of rare-earth metals.
EFFECT: enhanced efficiency due to avoidance of intermediate remelting of steel.
10 cl, 2 dwg