CN2226262Y

CN2226262Y - Shaft-type electrothermic vacuum reacting furnace

Info

Publication number: CN2226262Y
Application number: CN 95213312
Authority: CN
Inventors: 赵玉明
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-06-02
Filing date: 1995-06-02
Publication date: 1996-05-01
Anticipated expiration: 2005-06-02

Abstract

The utility model relates to a shaft type electrothermic vacuum reacting furnace. A reflecting screen 5 divides the vacuum furnace cavity into a vacuum high temperature reacting chamber 29 and a vacuum low temperature condensating chamber 30. A heat insulation blanket 10, a lightweight heat insulation brick 9, a supporting refractory brick 8, a heating element 7 and an annular charging barrel 6 are installed from outside to inside in the reacting chamber 29. A reflecting screen 5 is installed on the charging barrel 6, a magnesium crystallizating barrel 14 is positioned on the reflecting screen 5, a kalium and sodium crystallizing disc 15 is positioned on the magnesium crystallizating barrel 14, and a thermocouple 13 is installed on the furnace casing 1 through a sealing seat 27 and extends into the reacting chamber. The utility model has the advantages of simple structure and reasonable design, enabling the production cost of the magnesium to be reduced by 30 percent.

Description

Well formula electrothermal vacuum reacting furnace

The utility model relates to a kind of well formula electrothermal vacuum reacting furnace, genus light metal technical field of smelting of refining magnesium.

The refining magnesium vacuum reaction jar of traditional horizontal heat-resisting steel is a jar outer heating, vacuum in jar, and tank body promptly bears high temperature and bears high pressure again, and metal material is on the elastic limit works, though select expensive heat-resisting steels for use, its service life is still very short.Produce magnesium, charging, the difficult implementation of deslagging mechanization with retort.At present, internal heat type vacuum reaction stove exists that reaction speed is slow, complex structure, problem that cost is high, and magnesium factory extensively adopts as yet.Electric internal thermal reducing furnace as a kind of new production of magnesium by pidgeonprocess of Chinese patent 91202507.7.

The purpose of this utility model is to avoid above-mentioned weak point of the prior art and a kind of precious metal consumption that reduces is provided, and accelerates the reaction speed of furnace charge, energy efficient, shortens the well formula electrothermal vacuum reacting furnace of reinforced and deslagging time.

The purpose of this utility model can reach by following measure:

It forms vacuum hearth by furnace shell 1, water jacket 2, bell 3, vacuum pipe 4, and radiation shield 5 is separated into vacuum reaction chamber 29, vacuum condensation chamber 30 to burner hearth; Ecto-entad is equipped with heat insulation felt 10 in reaction chamber 29, lightweight thermal insulation brick 9, support refractory brick 8 and heater 7, heater 7 leads to the stove external power by conducting rod 11 with the binding post 12 of furnace shell sealed insulation, place the annular barrel 6 of filling the material piece in the central space that heater 7 is surrounded, radiation shield 5 is installed in upper end at barrel 6, water jacket 2 is equipped with in the furnace shell outside of condensation chamber 30, water inlet pipe 16 and outlet pipe 17 are housed on the water jacket 2, place magnesium crystallization tube 14 above the radiation shield 5, place potassium sodium crystallizing pan 15 on magnesium crystallization tube 14, thermocouple 13 is installed on the furnace shell 1 by seal receptacle 27 and stretches into reaction chamber.Radiation shield 5 is made up of the screen of the list more than two.Dan Ping is circular, is made of two heat-resisting steel sheet and plate 18 clamping one deck alumina silicate felts 19 through polishing, has a plurality of holes 21 above the Dan Ping, and multi-disc Dan Ping consists of integral body with bolt 20, tubular distance piece 28, staggers in the hole site on every layer of Dan Ping.The radial section of barrel 6 is an annular, is provided with the dividing plate 24 more than three between inwall 22 and the outer wall 23, and inwall 22 is provided with the hole, and the bucket end 25 is equipped with in the bottom of barrel 6, closes, opens by latch lever 26 controls.

Below in conjunction with drawings and Examples, the utility model is described in further detail:

Fig. 1 is a front view of the present utility model;

Fig. 2 is a vertical view of the present utility model;

Fig. 3 is annular barrel warp-wise profile;

Fig. 4 is a radiation shield master pseudosection.

It forms vacuum hearth by furnace shell 1, water jacket 2, bell 3, vacuum pipe 4; Radiation shield 5 is separated into vacuum reaction chamber 29, vacuum condensation chamber 30 to burner hearth; Ecto-entad is equipped with heat insulation felt 10, lightweight thermal insulation brick 9, supports refractory brick 8 and heater 7 in reaction chamber 29; Heater 7 leads to the stove external power by conducting rod 11 with the binding post 12 of furnace shell sealed insulation; Place the annular barrel 6 of filling the material piece in the central space that heater 7 is surrounded; Radiation shield 5 is installed in upper end at barrel 6; Water jacket 2 is equipped with in the furnace shell outside of condensation chamber 30, is welded with water inlet pipe 16 and outlet pipe 17 on the water jacket 2; Place magnesium crystallization tube 14 above the radiation shield 5 of condensation chamber 30 inside, on magnesium crystallization tube 14, place potassium sodium crystallizing pan 15; The vacuum pipe 4 on furnace shell 1 top leads to vavuum pump, and water inlet pipe 16 and outlet pipe 17 lead to the water source; Thermocouple 13 on the furnace shell 1 leads to switch board.Thermocouple 13 is installed on the furnace shell 1 by seal receptacle 27 and stretches into reaction chamber.

Said heater 7 is E _RCr ₂₇AL ₇MO ₂Resistance wire;

Said radiation shield 5 is made up of the single screen of multi-disc.Dan Ping is circular, is made of two heat-resisting steel sheet and plate 18 clamping one deck alumina silicate felts 19 through polishing, has a plurality of holes 21 above, and multi-disc Dan Ping becomes integral body with bolt 20, spacer sleeve sleeve pipe 28 assemblings, and the hole location on every layer of Dan Ping staggers.

Said barrel 6, warp-wise section are annular, are made up of inwall 22, outer wall 23, dividing plate 24, the movable bucket end 25, latch lever 26; Be covered with hole on the inwall 22; The movable bucket ends 25 usefulness latch lever 26 is installed or is unloaded.

In the actual production, at first the barrel 6 of filling the material piece is hung in the stove reaction chamber 29, barrel 6 upper ends radiation shields 5 are placed magnesium crystallization tube 14 above the radiation shield 5, place potassium sodium crystallizing pan 15 on magnesium crystallization tube 14.Switch on surplus in the of 10 minute, the paper bag afterburnt of charging is sealed close bell 3, starts vavuum pump, makes burner hearth vacuum reach 2 * 10 ^-1TOrr.Temperature of charge raises gradually, expects that at first the potassium sodium in the piece is reduced, and breaks away from stockpile with vapor form, passes the hole on the inner tube wall, rise through central space, and by the hole on the radiation shield, the potassium sodium crystallizing pan 15 on through condensation chamber 30 tops; Potassium sodium vapor temperature decrease is satisfied crystallization on dish 15 herein.When reaction chamber temperature reaches to 1160 ℃～1200 ℃, make its constant temperature.Magnesium is reduced under this temperature.As potassium sodium, with the form of magnesium vapor, along same road through arriving magnesium crystallization tube 14, and crystallization around barrel.Through after a while, reaction finishes substantially, and the material piece becomes lime-ash, cuts off the electricity supply, and the temperature in question response chamber 29 drops to about 800 ℃, the removal vacuum, and the bell 3 of slinging takes out potassium sodium crystallizing pan 15, and magnesium crystallization tube 14 peels behind the crystal standby; Hang out radiation shield 5, remove contamination, polish standby; Hang out barrel 6 at last to the slag dumping place, extract latch lever 26 out, unload the movable bucket end 25, lime-ash drops out in the tube, removes dust stratification in the tube, closes the bellicose end 25, and it is standby to fill the material piece.In the actual production, after taking out above-mentioned each part, the ready acknowledgment copy of can packing into drops into next production cycle operation immediately.

The utility model provides a kind of well formula electrothermal vacuum reacting furnace for refining magnesium, with existing Have technology to compare, the utility model is simple in structure, and is reasonable in design, can make under the magnesium production cost Fall 30%.

Claims

1, a kind of well formula electrothermal vacuum reacting furnace, form by furnace shell 1, water jacket 2, bell 3, vacuum pipe 4, radiation shield 5, barrel 6, heater 7, support refractory brick 8, lightweight thermal insulation brick 9, heat insulation felt 10, conducting rod 11, wiring master 12, thermocouple 13, magnesium crystallization tube 14, potassium sodium crystallizing pan 15, radiation shield 5 is divided into two chambeies up and down to the vacuum hearth of being made up of furnace shell 1, water jacket 2, bell 3, vacuum pipe 4, cavity of resorption is a vacuum high-temperature reaction chamber 29, and epicoele is a vacuum and low temperature condensation chamber 30; It is characterized in that ecto-entad is equipped with heat insulation felt 10, lightweight thermal insulation brick 9 in reaction chamber 29, support refractory brick 8 and heater 7, heater 7 leads to the stove external power by conducting rod 11 with the binding post 12 of furnace shell sealed insulation, place the annular barrel 6 of filling the material piece in the central space that heater 7 is surrounded, radiation shield 5 is installed in the upper end of barrel 6; Water jacket 2 is equipped with in the furnace shell outside of condensation chamber 30, water inlet pipe 16 and outlet pipe 17 are housed on the water jacket 2, place magnesium crystallization tube 14 above the radiation shield 5, place potassium sodium crystallizing pan 15 on magnesium crystallization tube 14, thermocouple 13 is installed on the furnace shell 1 by seal receptacle 27 and stretches into reaction chamber.

2, well formula electrothermal vacuum reacting furnace according to claim 1, it is characterized in that described radiation shield 5 is made up of the list more than two screen, Dan Ping is circular, constitute by two heat-resisting steel sheet and plate 18 clamping one deck alumina silicate felts 19 through polishing, have a plurality of holes 21 above the Dan Ping, multi-disc Dan Ping consists of integral body with bolt 20, tubular distance piece 28, staggers in the hole site on every layer of Dan Ping.

3, well formula electrothermal vacuum reacting furnace according to claim 1, the radial section that it is characterized in that described barrel 6 is provided with the dividing plate 24 more than three for annular between inwall 22 and the outer wall 23, inwall 22 is provided with the hole, the bucket end 25, be equipped with in the bottom of barrel 6, closes, opens by latch lever 26 controls.