CN102304627A - Electric heater capable of maintaining rated temperature while preparing pure sponge titanium by reduction distillation method - Google Patents

Abstract

The invention relates to an electric heater capable of maintaining a rated temperature while preparing pure sponge titanium by a reduction distillation method. The electric heater comprises a bellmouth internal electric heater, a vertical passageway electric heater and a lateral passageway electric heater, wherein a disc-shaped fragment laminated type electric heating wire high-aluminum ceramic insulative framework is arranged in the bellmouth internal electric heater, and a groove with an upward mouth and a U-shaped cross section is arranged near the inner mouth of the disc along the circumferential direction; and a pipe barrel type electric heating wire high-aluminum ceramic insulative framework, which is divided into two parts in vertical direction and can be combined, is arranged in the vertical passageway electric heater and the lateral passageway electric heater respectively, and 8-12 grooves with mouths toward the circle center and Omega-shaped sections are uniformly distributed inside the pipe barrel along the vertical direction. Because of the structural characteristics of the electric heater, the short circuit of the electric heating wire is effectively prevented, and the service lives of the internal electric heater and the passageway electric heaters are improved by 3-5 times, so that the production benefits are improved by 3-5 times.

Description

Keep the electric heater of temperature rating when in the reduction distillation method, producing pure titanium sponge

 

Technical field

The present invention is a kind of electric heater, especially a kind of electric heater that is used for when the reduction distillation method is produced pure titanium sponge, keeping temperature rating.

 

Background technology

When producing pure titanium sponge, at first liquid titanium tetrachloride is added and be equipped with in the reduction reactor of MAGNESIUM METAL, make titanium tetrachloride and MAGNESIUM METAL in 900～1100 ℃ high temperature argon, carry out chemical reaction, produce the titanium nuclei of crystallization and gaseous state magnesium chloride.Under the negative pressure of vacuum effect, the gaseous state magnesium chloride of generation gets into along a passageway in the vacuum distilling reactor of opposite side, reclaims chlorine and magnesium through fused salt electrolysis again.The titanium nuclei of crystallization that produce in the reduction reactor then form required product---pure titanium sponge gradually.Problem is: the gaseous state magnesium chloride gets into the vacuum distilling reactor of opposite side, and during on the way through the passageway, the temperature in the passageway must maintain between 900～1100 ℃, otherwise the gaseous state magnesium chloride is easy to generate and solidifies and stop up the passageway, and influences the quality of pure titanium sponge.Be head it off, the electric heater that temperature is complementary must be set on the inwall of passageway, so that the gaseous state magnesium chloride can under 900～1100 ℃ high temperature rated, be passed through smoothly.

The electric heater that is arranged at present on the inwall of passageway is not ideal; Reason is that the electrical heating wire in the electric heater is shelved on direction in the support frame of the groove of semicircular in shape one by one at center, passageway; And the very easily oxidation at high temperature of passageway inwall; Directly outer with the being exposed at half slot electrical heating wire of powder that peels off after the oxidation contacts; Like this; Cause the electrical heating wire short circuit easily, force electric heater to quit work.Present electrical heating wire all adopts the rock wool material to insulate, and under the condition of high temperature, operating behind 1～2 stove rock wool will detrition, and bonds together with electrical heating wire, and the render electrical heater strip can't be changed, and can only tear a whole set of electric heater open trade-in.

 

Summary of the invention

Technical problem to be solved by this invention is that a kind of improved electric heater will be provided, especially a kind of electric heater that is used for when the reduction distillation method is produced pure titanium sponge, keeping temperature rating.

For solving the technical scheme that above technical problem adopts is such:

Keep the electric heater of temperature rating when in the reduction distillation method, producing pure titanium sponge; It comprises electric heater in the hydraucone; Perpendicular passageway electric heater and transverse aisle electric heater; Characteristic is: in hydraucone in the electric heater; Be provided with discoid minute sheet superposed type electrical heating wire high alumina ceramic insulation framework, lean on mouthful place in the disk along the circumferential direction be provided with mouth up and cross section be the groove of " U " shape; In perpendicular passageway electric heater and transverse aisle electric heater, establish one and vertically dividing two halves, but and the tubular style electrical heating wire high alumina ceramic insulation framework of obvolvent, this socket inboard along vertically be laid with 8～12 mouths towards the center of circle and the cross section be the groove of " Ω " shape.During use,, electrical heating wire suffered as long as being embedded above-mentioned each groove.

Because adopt above technical scheme, its effect is conspicuous:

1, embeds in each corresponding " U " shape and " Ω " shape isolation recesses because of electrical heating wire; And satisfy the operating mode design requirements; At high temperature the passageway tube wall peels off the oxide compound that gets off and can not contact with the electrical heating wire in embedding groove; So avoided short circuit; Guaranteed interior electric heater, passageway electric heater normal heating continuously, made reacted gaseous state magnesium chloride under temperature rating, waltz through the passageway and get in the vacuum distilling reactor.

2, this structure is convenient to the replacing of electrical heating wire, when the electrical heating wire life termination, can directly change electrical heating wire, need not change insulation framework and electric heater complete assembly, has improved 3～5 times of life-spans of interior electric heater, passageway electric heater.

 

Description of drawings

Fig. 1 is a general assembly sectional view of the present invention.

Fig. 2 is the enlarged view of I among Fig. 1.

Fig. 3 is an A-A cross section enlarged view among Fig. 2.

Fig. 4 is a B-B vertical section enlarged view among Fig. 2.

Among the figure: 1, interior electric heater 2, perpendicular passageway electric heater 3, transverse aisle electric heater 4, divide that sheet superposed type electrical heating wire high alumina ceramic insulation bone adds 5, tubular style electrical heating wire high aluminaceramic insulation framework 6,electrical heating wire 7, reduction reactor 8, distillation reactor.

Embodiment

The present invention is a kind of electric heater of keeping temperature rating when in the reduction distillation method, producing pure titanium sponge, and it comprises electric heater 1 in the hydraucone, perpendicular passageway electric heater 2 and transverse aisle electric heater 3.In hydraucone, in the electric heater, be provided with discoid minute sheet superposed type electrical heating wire high alumina ceramic insulation framework 4, leaning in the disk mouthful place along the circumferential direction, be provided with mouth up and cross section be the groove of " U " shape; In perpendicular passageway electric heater and transverse aisle electric heater, be provided with vertical minute two halves, but and the tubular style electrical heating wire high aluminaceramic insulation framework 5 of obvolvent, this socket inboard along vertically be laid with 8～12 mouths towards the center of circle and the cross section be the groove of " Ω " shape.When concrete the making, again the electrical heating wire of making is embedded in each corresponding " U " shape and " Ω " shape isolation recesses, and satisfy the operating mode design requirements.During work, with titanium tetrachloride inject thereduction reactor 7 of MAGNESIUM METAL is housed after, in 900～1100 ℃ of high temperature argons, carry out chemical reaction, produce the titanium nuclei of crystallization and gaseous state magnesium chloride.Under the negative pressure of vacuum effect, the gaseous state magnesium chloride of generation gets in the vacuum distilling reactor 8 of opposite side along interior electric heater, perpendicular passageway electric heater, transverse aisle electric heater, reclaims chlorine and magnesium through fused salt electrolysis again.Under effect of the present invention, make the gaseous state magnesium chloride remain at 900～1100 ℃ on the way, be unlikely to Yin Wendu and descend and solidify on the way.Because constitutional features of the present invention has prevented the short circuit of electrical heating wire effectively, reach 3～5 times the work-ing life of electric heater, passageway electric heater in improving, so productivity effect has also improved 3～5 times thereupon.

Claims (1)

1. electric heater of keeping temperature rating when in the reduction distillation method, producing pure titanium sponge; It comprises electric heater (1) in the hydraucone; Perpendicular passageway electric heater (2) and transverse aisle electric heater (3); Characteristic is: in hydraucone in the electric heater; Be provided with discoid minute sheet superposed type electrical heating wire high alumina ceramic insulation framework (4); Leaning in the disk mouthful place along the circumferential direction, be provided with mouth up and cross section be the groove of " U " shape; In perpendicular passageway electric heater and transverse aisle electric heater; But be provided with in the tubular style electrical heating wire high alumina ceramic insulation framework (5) of vertically dividing two halves and obvolvent, this socket inboard along vertically be laid with 8～12 mouths towards the center of circle and the cross section be the groove of " Ω " shape.

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