CN210512616U

CN210512616U - Regenerative magnesia carbon brick heat treatment furnace

Info

Publication number: CN210512616U
Application number: CN201920708118.8U
Authority: CN
Inventors: 沈军华; 沈立宇; 张建峰; 林坚
Original assignee: Zhejiang Jinhuihua Special Refractories Co ltd
Current assignee: Zhejiang Jinhuihua Special Refractories Co ltd
Priority date: 2019-05-17
Filing date: 2019-05-17
Publication date: 2020-05-12
Anticipated expiration: 2029-05-17

Abstract

The utility model belongs to the technical field of magnesia carbon brick recovery, and discloses a regenerative magnesia carbon brick heat treatment furnace, which comprises a controller and a furnace body, wherein the controller is positioned at one side of the furnace body, a conductive sleeve is embedded on the outer wall at one side of the furnace body, a porous mounting plate is welded inside the furnace body, a treatment cavity and an exhaust cavity are respectively formed above and below the porous mounting plate, a door hole is arranged at one side of the treatment cavity, and slide rails are welded at the top end and the bottom end of the treatment cavity, the utility model carries out semi-sealed heat treatment operation on magnesia carbon bricks after water spraying, on one hand, the moisture is promoted to fully react with aluminum carbide in the magnesia carbon bricks, thereby avoiding the phenomena of cracking and bulging after the regeneration of the magnesia carbon bricks, effectively improving the molding quality of the regenerative magnesia carbon bricks, on the other hand, the gas in the furnace is discharged by utilizing methane generated by the reaction and vapor generated by heating, thereby effectively reducing the oxygen content in the, thereby reducing the oxidation degree of the graphite in the magnesia carbon brick.

Description

Regenerative magnesia carbon brick heat treatment furnace

Technical Field

The utility model belongs to the technical field of the magnesium carbon brick is retrieved, concretely relates to regeneration magnesium carbon brick heat treatment furnace.

Background

The magnesia carbon brick is a refractory material prepared by taking magnesia as a raw material, the magnesia belongs to a scarce resource in the existing market, in order to reduce the production cost, the recycling and regeneration of the magnesia carbon brick are realized in China, the regeneration process comprises the heat treatment operation of the magnesia carbon brick, the regeneration heat treatment mainly comprises a full-loss-of-combustion method, a half-loss-of-combustion method and a baking-free method, and the full-loss-of-combustion method removes graphite and a bonding agent in the magnesia carbon brick, thereby causing a large amount of graphite waste; the semi-loss-on-ignition method retains partial graphite, but the graphite is oxidized at high temperature to form a decarburized layer; the utilization rate of the magnesia carbon brick during regeneration is influenced, graphite is reserved by a baking-free method, but the bonding agent cannot be removed, so that the qualification rate of the magnesia carbon brick during regeneration is reduced;

in addition, most of magnesia carbon brick production processes can heat aluminum powder as an antioxidant, the aluminum powder reacts with carbon elements in the magnesia carbon brick at high temperature, a large amount of aluminum carbide is produced after the reaction, and the aluminum carbide can react with water or water vapor at normal temperature to produce certain methane gas, so that the regenerated magnesia carbon brick cracks and bulges, and the forming quality of the regenerated magnesia carbon brick is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a regeneration magnesia carbon brick heat treatment furnace to solve current magnesia carbon brick and have the extravagant relatively poor problem of a large amount of graphite and utilization ratio when carrying out regeneration heat treatment, and can produce a large amount of aluminium carbide and influence the problem of regeneration magnesia carbon brick shaping quality after the heat treatment.

In order to achieve the above object, the utility model provides a following technical scheme:

a regenerative magnesia carbon brick heat treatment furnace comprises a controller and a furnace body, wherein the controller is positioned on one side of the furnace body, a conductive sleeve is embedded in the outer wall of one side of the furnace body, a porous mounting plate is welded in the furnace body, a treatment cavity and an exhaust cavity are respectively formed above and below the porous mounting plate, a door hole is formed in one side of the treatment cavity, slide rails are welded at the top end and the bottom end of the treatment cavity, an inner sealing door is connected between the two sets of slide rails in a sliding manner, a plurality of partition plates are welded on the outer wall of one side of the inner sealing door at equal intervals, an outer sealing door is welded at one end, away from the inner sealing door, of each partition plate, an electric heating pipe is embedded in each partition plate, the outer sealing door and the inner sealing door are connected with the door holes in a clamping manner, a conductive column is installed on the outer wall of one side of the outer sealing door, electric wires are connected between, an exhaust pipe is installed on one side of the exhaust cavity, a pressure valve is installed on the exhaust pipe, and the electric heating pipe is electrically connected with the controller.

Preferably, the condensation separator is installed on the top of controller, be equipped with two discharging pipes on one side outer wall of condensation separator, two discharging pipes are gas outlet pipe and comdenstion water exit tube respectively, the fan is installed on the top of condensation separator, the air inlet end and the air-out end of fan are connected with treatment chamber and condensation separator respectively, fan and controller electric connection.

Preferably, a plurality of through holes are formed in the partition plate, and the through holes and the electric heating pipes are arranged at intervals.

Preferably, the bottom end of the outer sealing door is fixedly connected with a roller through a bolt.

Preferably, the electric heating furnace also comprises a preheater and an air heater, the conductive sleeve, the electric heating pipe and the conductive column are respectively replaced by an air inlet sleeve, an air guide heating pipe and an air inlet joint, an air outlet sleeve is embedded in the outer wall of one side of the furnace body far away from the air inlet sleeve, an air outlet joint is installed on the outer wall of one side of the inner sealing door, air pipes are connected between the air inlet joint and the air guide heating pipe and between the air inlet joint and the air outlet joint and the air inlet sleeve are respectively connected with the air inlet sleeve and the air outlet sleeve in a clamping manner, the preheater is positioned on one side of the furnace body, air outlet pipes and air inlet pipes are respectively installed on two sides of the preheater, the number of the air outlet pipes is three, one air outlet pipe is connected with a condensation separator, the number of the air inlet pipes is four, the four air inlet pipes are respectively connected with the, and the air inlet end and the air outlet end of the air heater are respectively connected with the preheater and the air inlet sleeve, and the air heater is electrically connected with the controller.

Compared with the prior art, the utility model, following beneficial effect has:

(1) the utility model discloses magnesia carbon brick after to the water spray carries out semi-enclosed formula heat treatment operation, make the aluminium carbide fully react in moisture and the magnesia carbon brick on the one hand, thereby avoid the magnesia carbon brick fracture to appear after the regeneration, the phenomenon of swell, effectively improve the shaping quality of regeneration magnesia carbon brick, on the other hand utilizes the methane that the reaction produced and the vapor that the heating produced to gas outgoing in with the stove, thereby effectively reduce the oxygen content in the stove, and with this oxidation degree that reduces graphite in the magnesia carbon brick, still can detach the binder in the magnesia carbon brick simultaneously in the heating process, thereby effectively improve the utilization ratio that the magnesia carbon brick retrieved regeneration.

(2) The utility model discloses set up condensation separator and fan, utilized above-mentioned structure to effectively realize the separation between methane and the vapor after accomplishing the processing to realize methane and vapor's recycle.

(3) The utility model discloses set up circulation heating system, utilized hot-air circulation to realize the heating operation in the furnace body to guarantee above-mentioned thermal treatment effectively go on, cooperate the pre-heater to realize thermal recovery in the exhaust gas simultaneously, thereby effectively reduce the calorific loss among the thermal treatment process, reach effectual energy-conserving effect.

Drawings

Fig. 1 is a front view of a first embodiment of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is an enlarged view taken at A in FIG. 2;

FIG. 4 is a top view of the middle partition plate of the present invention;

fig. 5 is a front view of a second embodiment of the present invention;

FIG. 6 is a side view of FIG. 5;

in the figure: 1-controller, 11-condensation separator, 12-fan, 2-furnace body, 21 a-conductive sleeve, 21 b-air inlet sleeve, 22-air outlet sleeve, 3-porous mounting plate, 4-treatment cavity, 41-door hole, 42-slide rail, 43-inner sealing door, 431-air outlet joint, 44-clapboard, 441 a-electric heating tube, 441 b-air guide heating tube, 442-through hole, 45-outer sealing door, 451 a-conductive column, 451 b-air inlet joint, 452-roller, 5-exhaust cavity, 51-exhaust pipe, 52-pressure valve, 6-preheater, 61-exhaust pipe, 62-intake pipe and 7-air heater.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

Referring to fig. 1-4, the present invention provides the following technical solutions: a regenerative magnesia carbon brick heat treatment furnace comprises a controller 1 and a furnace body 2, wherein the controller 1 is positioned at one side of the furnace body 2, a conductive sleeve 21a is embedded in the outer wall at one side of the furnace body 2, a porous mounting plate 3 is welded in the furnace body 2, a treatment cavity 4 and an exhaust cavity 5 are respectively formed above and below the porous mounting plate 3, a door hole 41 is formed in one side of the treatment cavity 4, slide rails 42 are welded at the top end and the bottom end of the treatment cavity 4, an inner sealing door 43 is connected between the two groups of slide rails 42 in a sliding manner, a plurality of partition plates 44 are welded on the outer wall at one side of the inner sealing door 43 at equal intervals, an outer sealing door 45 is welded at one end of each partition plate 44 far away from the inner sealing door 43, an electric heating pipe 441a is embedded in each partition plate 44, the outer sealing door 45 and the inner sealing door 43 are both clamped and connected with the door hole 41, a conductive column 451a is installed on the outer wall at one side of, the conductive post 451a is connected to the conductive sleeve 21a in a snap-fit manner, the exhaust pipe 51 is installed at one side of the exhaust chamber 5, the pressure valve 52 is installed on the exhaust pipe 51, and the electric heating pipe 441a is electrically connected to the controller 1.

Referring to fig. 1 to 3, the recycling and regenerating operations of the magnesia carbon bricks are as follows: the outer sealing door 45 is pulled outwards, the outer sealing door 45 drives the partition boards 44 to move out of the treatment cavity 4, the inner sealing door 43 is clamped with the door hole 41, then the used magnesia carbon bricks are uniformly placed on the plurality of partition boards 44, water spraying treatment is carried out on the uniformly placed magnesia carbon bricks, the outer sealing door 45 is pushed back after water spraying is finished, the magnesia carbon bricks and the partition boards 44 are moved back to the inside of the treatment cavity 4 until the outer sealing door 45 is clamped and sealed with the door hole 41, meanwhile, the conductive sleeve 21a is clamped and connected with the conductive post 451a, the electric heating pipe 441a can be started through the controller 1, the electric heating pipe 441a is electrified and heated, so that the temperature in the treatment cavity 4 is gradually raised, moisture and aluminum carbide are fully reflected, therefore, aluminum carbide in the magnesia carbon bricks are effectively removed, methane is generated in the reaction process, the gas density of the methane is less than the air density, and therefore the methane moves towards the upper part in the treatment cavity 4, and pushes the air above the processing chamber 4 to settle downwards, so as to form gas flow as shown by arrows in fig. 1, when the aluminum carbide completely reacts, the generation of methane is stopped, the remaining water forms water vapor along with the rise of temperature, the gas density of the water vapor is also smaller than that of the air, and the gas flow in fig. 1 is also formed, so that the air inside the processing chamber 4 is pushed into the exhaust chamber 5, and along with the gradual increase of the gas inside the processing chamber 4, the pressure inside the furnace body 2 is gradually increased, so as to drive the pressure valve 52 to open, so that the air settled in the exhaust chamber 5 is exhausted, thereby avoiding the phenomenon that the pressure inside the furnace body 2 is too high, and simultaneously, the exhaust of the air reduces the oxygen content inside the processing chamber 4, so as to effectively reduce the oxidation degree of the graphite inside the magnesia carbon brick.

Further, a condensation separator 11 is installed at the top end of the controller 1, two discharging pipes are arranged on the outer wall of one side of the condensation separator 11, the two discharging pipes are respectively a gas outlet pipe and a condensed water outlet pipe, a fan 12 is installed at the top end of the condensation separator 11, the air inlet end and the air outlet end of the fan 12 are respectively connected with the processing cavity 4 and the condensation separator 11, the fan 12 is electrically connected with the controller 1, refer to fig. 1, after the heat treatment is finished, the fan 12 is started to lead out the methane and the water vapor in the treatment cavity 4, the methane and the water vapor are separated in the condensation separator 11, the separation principle is cooling, the water vapor is cooled to form liquid water, the methane still keeps a gas state and is insoluble in water, thereby effectively realize the separation of methane and vapor, derive respectively through gas exit tube and comdenstion water exit tube after the separation to this effectively realizes the recycle of methane and vapor.

Furthermore, a plurality of through holes 442 are formed in the partition plate 44, the through holes 442 and the electric heating pipes 441a are arranged at intervals, referring to fig. 4, each partition plate 44 is provided with a plurality of through holes 442, so that on one hand, smooth rising of water vapor is ensured, on the other hand, the water vapor can effectively contact with the magnesia carbon brick on the upper layer when rising, and thus, the heating effect in the treatment chamber 4 is effectively improved.

Specifically, the bottom end of the outer door 45 is fixedly connected with the roller 452 through a bolt, and referring to fig. 2, the movement operation of the outer door 45 is simpler and more convenient through the arrangement of the roller 452.

Example 2

Referring to fig. 5-6, a regenerative magnesia carbon brick heat treatment furnace further includes a preheater 6 and an air heater 7, the conductive sleeve 21a, the electric heating tube 441a and the conductive post 451a are respectively replaced by an air inlet sleeve 21b, an air guide heating tube 441b and an air inlet joint 451b, an air outlet sleeve 22 is embedded in the outer wall of one side of the furnace body 2 away from the air inlet sleeve 21b, an air outlet joint 431 is installed on the outer wall of one side of the inner sealing door 43, air pipes are connected between the air inlet joint 451b and the air outlet joint 431 and the air guide heating tube 441b, the air inlet joint 451b and the air outlet joint 431 are respectively connected with the air inlet sleeve 21b and the air outlet sleeve 22 in a clamping manner, the preheater 6 is located at one side of the furnace body 2, air outlet pipes 61 and air inlet pipes 62 are respectively installed at two sides of the preheater 6, three air outlet pipes 61 are provided, one air outlet pipe 61 is connected, and four air inlet pipes 62 are respectively connected with the external environment, the air outlet sleeve 22, the air outlet pipe 51 and the air outlet end of the fan 12, the air heater 7 is installed at the top end of the preheater 6, the air inlet end and the air outlet end of the air heater 7 are respectively connected with the preheater 6 and the air inlet sleeve 21b, and the air heater 7 is electrically connected with the controller 1.

Compared with the embodiment 1, the embodiment 2 adopts the hot air circulation heating mode to perform the heating operation in the processing chamber 4, and other operations are kept unchanged, and the heating process is as follows: the outside is introduced into the preheater 6 and flows into the air heater 7 through the preheater 6, the air heater 7 heats the air to form dry high-temperature air, the dry high-temperature air is introduced into each air guide heating pipe 441b through the air inlet sleeve 21b and the air inlet joint 451b, the high-temperature air is subjected to heat exchange between the air guide heating pipe 441b and the partition plate 44 to achieve a heating effect, the treatment effect in the embodiment 1 is formed after heating, and the air subjected to heat exchange flows back into the preheater 6 through the air outlet joint 431 and the air outlet sleeve 22 to preheat the air introduced into the preheater 6, so that the heat waste in the whole heating process is effectively reduced;

in addition, the air exhausted by the exhaust pipe 51 is also introduced into the preheater 6, and is exhausted by the air outlet pipe 61 after heat exchange, and in the embodiment, the gas exhausted by the fan 12 is also introduced into the preheater 6, so that on one hand, the preheating of the air is realized, and on the other hand, the heat of methane and steam is reduced, thereby reducing the energy consumption during the subsequent separation, and effectively realizing the energy-saving effect of the treatment furnace.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a regeneration magnesia carbon brick heat treatment furnace, includes controller (1) and furnace body (2), controller (1) is located one side of furnace body (2), its characterized in that: the electric heating furnace is characterized in that a conductive sleeve (21 a) is embedded into the outer wall of one side of the furnace body (2), a porous mounting plate (3) is welded inside the furnace body (2), a treatment cavity (4) and an exhaust cavity (5) are formed above and below the porous mounting plate (3) respectively, a door hole (41) is formed in one side of the treatment cavity (4), slide rails (42) are welded at the top end and the bottom end of the treatment cavity (4), an inner sealing door (43) is connected between the two sets of slide rails (42) in a sliding manner, a plurality of partition plates (44) are welded on the outer wall of one side of the inner sealing door (43) at equal intervals, an outer sealing door (45) is welded at one end, away from the inner sealing door (43), of each partition plate (44), an electric heating pipe (441 a) is embedded into the inside of each partition plate (44), the outer sealing door (45) and the inner sealing door (43) are connected with the door hole (41) in a clamping manner, and, the electric heating device is characterized in that conductive wires are connected between the conductive posts (451 a) and the electric heating pipes (441 a), the conductive posts (451 a) are connected with the conductive sleeves (21 a) in a clamping mode, the exhaust pipe (51) is installed on one side of the exhaust cavity (5), the pressure valve (52) is installed on the exhaust pipe (51), and the electric heating pipes (441 a) are electrically connected with the controller (1).

2. The regenerative magnesia carbon brick heat treatment furnace according to claim 1, characterized in that: condensation separator (11) are installed on the top of controller (1), be equipped with two discharging pipes on one side outer wall of condensation separator (11), two discharging pipes are gas outlet pipe and comdenstion water exit tube respectively, fan (12) are installed on the top of condensation separator (11), the air inlet end and the air-out end of fan (12) are connected with treatment chamber (4) and condensation separator (11) respectively, fan (12) and controller (1) electric connection.

3. The regenerative magnesia carbon brick heat treatment furnace according to claim 1, characterized in that: a plurality of through holes (442) are formed in the partition plate (44), and the through holes (442) and the electric heating pipes (441 a) are arranged at intervals.

4. The regenerative magnesia carbon brick heat treatment furnace according to claim 1, characterized in that: the bottom end of the outer sealing door (45) is fixedly connected with a roller (452) through a bolt.

5. The regenerative magnesia carbon brick heat treatment furnace according to claim 1, further comprising a preheater (6) and an air heater (7), wherein: the electric conduction sleeve (21 a), the electric heating pipe (441 a) and the conductive column (451 a) are respectively replaced by an air inlet sleeve (21 b), an air guide heating pipe (441 b) and an air inlet joint (451 b), an air outlet sleeve (22) is embedded into the outer wall of one side of the furnace body (2) far away from the air inlet sleeve (21 b), an air outlet joint (431) is installed on the outer wall of one side of the inner sealing door (43), air pipes are connected between the air inlet joint (451 b) and the air outlet joint (431) and the air guide heating pipe (441 b), the air inlet joint (451 b) and the air outlet joint (431) are respectively connected with the air inlet sleeve (21 b) and the air outlet sleeve (22) in a clamping manner, the preheater (6) is located on one side of the furnace body (2), air outlet pipes (61) and air inlet pipes (62) are respectively installed on two sides of the preheater (6), the number of the air outlet pipes (61) is three, and one air outlet pipe (61) is, intake pipe (62) are equipped with four altogether, and four intake pipe (62) respectively with external environment, go out the end connection of giving vent to anger of gas cover (22), blast pipe (51) and fan (12), air heater (7) are installed on the top of pre-heater (6), and the inlet end of air heater (7) with give vent to anger the end respectively with pre-heater (6) with admit air cover (21 b) and be connected, air heater (7) and controller (1) electric connection.