CN101311111B

CN101311111B - Electric calcined graphitization furnace

Info

Publication number: CN101311111B
Application number: CN2007102006765A
Authority: CN
Inventors: 陈宁
Original assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Current assignee: Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Priority date: 2007-05-22
Filing date: 2007-05-22
Publication date: 2010-08-25
Anticipated expiration: 2027-05-22
Also published as: CN101311111A

Abstract

The invention discloses an electrically calcined graphitized furnace. The circumference of an inner lining of the furnace (7) is provided with a gas guiding pipe (1) which is communicated with a circumferential communication pipe (2); the communication pipe (2) is communicated with a slag chamber (3) at the furnace side; the outer side of the slag chamber (3) is provided with a vacuum pumping pipe (4) and a cleaning door (5). The invention is capable of smoothly discharging impurity contained in raw material, thus ensuring product purity and capacity. The furnace of the invention has simple structure, lower application cost, stable performance, long service life, high heat utilization rate and low running and maintaining cost.

Description

Electric calcined graphitization furnace

Technical field

The present invention relates to a kind of electric calcined graphitization furnace.

Background technology

At present, the electric calcined graphitization furnace production requirement is forged back Jiao with raw material and is calcined to high temperature and greying more than 2000 ℃, and the purity for the greying product has higher requirement simultaneously.Jiaozhuo was resistance material energising heating after the general using graphitizing furnace will be forged in the prior art, and the impurity discharger is not set.The consequence that causes like this is: under the nearly 3000 ℃ high temperature action of furnace high-temperature section, impurity such as the sulphur in the raw material, silicon, aluminium, iron all exist with gaseous form, when these foreign gases are moved upwards up to lesser temps section more than the upper electrode, again solidify out into is solid-state and attached on the not graphited raw material, and along with discharge carries out, these not graphited raw materials that contain high impurity are moved down into high temperature section, through high temperature action, impurity distils again, moves up and adsorbs, and goes round and begins again.This not only influences the purity and the production capacity of greying product, and has wasted a large amount of energy, also because the frequent absorption of impurity causes the coking crust, influences the smooth and easy of discharge and carries out simultaneously, even cause accidents such as electricity calcining bias current, short circuit.Obviously, existing electric calcined graphitization furnace production equipment is not ideal enough.

Summary of the invention

The technical problem to be solved in the present invention is: a kind of new electric calcined graphitization furnace is provided, and this stove can in time be got rid of impurity in the raw material, and product purity is improved greatly, heat energy utilization rate height, and operation and maintenance cost are low, to overcome the deficiency that prior art exists

The present invention constitutes like this: it comprises furnace lining (7), gas guide wire (1) is set on the inwall circumference of furnace lining (7), gas guide wire (1) with circumferentially be communicated with communicating pipe (2), circumferentially be communicated with the slag pocket (3) of furnace side communicating pipe (2), slag pocket (3) arranged outside has vaccum suction tube (4) and cleaning door (5).

The above 500mm of the lower end～1500mm place of upper electrode (8) when gas guide wire (1) entrance height position is positioned at normal the operation.

The upward perforate of gas guide wire (1), with horizontal plane angle be 60 °～85 °.

Gas guide wire (1) internal diameter is φ 30～φ 100mm.

Gas guide wire (1) is along circumferentially evenly arranging 4～12.

Circumferentially (2) internal diameter is φ 50～φ 150mm communicating pipe.

The interior outage degree of slag pocket (3) is 2000mm～4000mm, and interior empty length and width size respectively is 500mm～1500mm.

(2) inlet communicating is downward-sloping to slag pocket (3) with circumferential communicating pipe, and this inlet is not less than 60 ° near the domatic and horizontal plane angle under the side direction of furnace chamber inwall.

The inboard flame retardant coating thickness of being separated by with furnace chamber of slag pocket (3) is about 300mm～1000mm.

The interior vacant lot face of slag pocket (3) is higher than the upper end of lower electrode (6).

Vaccum suction tube (4) is in slag pocket (3) external wall bottom, and its height is more than cleaning door (5).

In 500mm～1000mm scope that vaccum suction tube (4) outlet is counted from slag pocket (3) external wall water jacket is set.

Cleaning door (5) is positioned at slag pocket (3) external wall bottom, and vacant lot face is concordant with vacant lot face in the slag pocket in it, and sealing is set between metope.

Compared with prior art, the present invention makes that impurity is able to smooth and easy eliminating in the raw material, thereby product purity and production capacity are all guaranteed; This furnace structure is simple, and implementation cost is lower; Use properties is stable, high life; Heat energy utilization rate height; Operation and maintenance cost are low.

Description of drawings

Fig. 1 is structural representation of the present invention, front view, and this stove other parts same as the prior art are not illustrated.

Fig. 2 is the vertical view of Fig. 1.

Embodiment

Embodiments of the invention: as shown in Figure 1, when normal operation more than the termination of upper electrode 8 on the furnace lining 7 at about 1000mm place, along 8 gas guide wires 1 upwards are set in week, gas guide wire 1 and circumferentially directly perforate realization on the stove liner of communicating pipe 2 promptly adopt special shaped brick with holes to build the region of interest of stove liner by laying bricks or stones.These guide wires 1 link to each other with the slag pocket 3 of furnace side after circumferentially being communicated with communicating pipe 2, and slag pocket 3 arranged outside have water-cooled vaccum suction tube 4 and cleaning door 5; Gas guide wire 1 internal diameter is φ 100mm, upward perforate, with horizontal plane angle be 60 °, circumferentially internal diameter is φ 100mm communicating pipe 2; The outage degree is 3600mm in the slag pocket 3, interior empty length and width size respectively is about 1000mm, inlet is close to circumferential communicating pipe 2, inlet side down is sloping shape transition, this domatic and horizontal plane angle are 75 °, the inboard flame retardant coating thickness of being separated by with furnace chamber of slag pocket is about 800mm, and the interior vacant lot face of slag pocket 3 is more than the upper end of lower electrode 6; Vaccum suction tube 4 is on slag pocket 3 external walls, and height location is in cleaning door more than 5, and the about 1200mm of floor level in the slag pocket is provided with water jacket in the about 500mm scope of vaccum suction tube outlet; Cleaning door 5 is positioned at slag pocket 3 external walls bottoms, and vacant lot face should be concordant with vacant lot face in the slag pocket in it, adopts between cleaning door flange and metope steel plate that bolt is connected, vacuum rubber seals.

During work, under the nearly 3000 ℃ high temperature action of furnace high-temperature section, all distilling as impurity such as sulphur, silicon, aluminium, iron in the raw material becomes gaseous state and moves up, and the trend that is full of whole furnace inner space is arranged; When these gases went upward to gas guide wire 1 place, partial impurities gas was through gas guide wire 1 and circumferentially communicating pipe 2 enter slag pocket 3, and this moment, the foreign gas temperature was still very high, kept gaseous state; In the middle and lower part of slag pocket 3, along with gas temperature is reduced to below the zero pour, impurity begins to solidify and deposits on slag pocket ground with solid-state form; Along with the deposition of solidifying of impurity, form the parital vacuum state in the slag pocket 3, cause the foreign gas in the electric calciner constantly to gush, and constantly solidify deposition; In the gas of pouring into slag pocket 3, except that impurity such as above-mentioned sulphur, silicon, aluminium, iron, also exist certain as CO _X, NO _X, SO _X, H ₂Gases such as S do not occupy the volume of slag pocket for making this class gas, need regularly or continuously it be extracted out, and this work is finished by the vaccum suction tube 4 that an end connects vacuum pump; Though the temperature in the slag pocket 3 greatly reduce than temperature in the stove, but still 1000 ℃ the high temperature of having an appointment, so vaccum suction tube 4 will adopt water jacket to cool off; Stove is opened cleaning door 5 after the operation certain period under the blowing out state, empty indoor impurity, and refractory materials is repaired.

Claims

1. electric calcined graphitization furnace, it comprises furnace lining (7), it is characterized in that: gas guide wire (1) circumferentially is set at furnace lining (7), gas guide wire (1) with circumferentially be communicated with communicating pipe (2), circumferentially be communicated with the slag pocket (3) of furnace side communicating pipe (2), slag pocket (3) arranged outside has vaccum suction tube (4) and cleaning door (5); The above 500mm of the lower end～1500mm place of upper electrode (8) when gas guide wire (1) entrance height position is positioned at normal the operation; Upward perforate of gas guide wire (1) and horizontal plane angle are 60 ^o～85 ^oGas guide wire (1) internal diameter is φ 30～φ 100mm; Gas guide wire (1) is circumferentially evenly arranged 4～12 along furnace lining (7); Circumferentially (2) internal diameter is φ 50～φ 150mm communicating pipe; The interior outage degree of slag pocket (3) is 2000mm～4000mm, and interior empty length and width size respectively is 500mm～1500mm; Domatic and horizontal plane angle under slag pocket (3) and the close side direction of furnace chamber inwall of circumferential communicating pipe (2) inlet communicating is not less than 60 ^oThe inboard flame retardant coating thickness of being separated by with furnace chamber of slag pocket (3) is about 300mm～1000mm; The interior vacant lot face of slag pocket (3) is higher than the upper end of lower electrode (6); Vaccum suction tube (4) is in slag pocket (3) external wall bottom, and its height is more than cleaning door (5); In 500mm～1000mm scope that vaccum suction tube (4) outlet is counted from slag pocket (3) external wall water jacket is set; Cleaning door (5) is positioned at slag pocket (3) external wall bottom, and vacant lot face is concordant with vacant lot face in the slag pocket in it, and sealing is set between metope.