CN111795574A

CN111795574A - Firebrick fritting furnace

Info

Publication number: CN111795574A
Application number: CN202010598852.0A
Authority: CN
Inventors: 李金龙
Original assignee: Suzhou Dongziyun Industrial Technology Technology Co ltd
Current assignee: Suzhou Dongziyun Industrial Technology Technology Co ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2020-10-20

Abstract

The invention discloses a refractory brick sintering furnace which comprises a furnace body, wherein a heating motor interface is arranged on the outer surface of the furnace body, one side of the furnace body is connected with a vacuumizing interface, one end of the vacuumizing interface is connected with a vacuumizing valve, one end of the vacuumizing valve is connected with a vacuum pump port pipeline, the vacuum pump port pipeline is connected with a Roots vacuum pump, one side of the Roots vacuum pump is connected with a unit connection corrugated pipe, one end of the unit connection corrugated pipe is connected with a water ring pump valve, the bottom of the water ring pump valve is connected with a water ring pump connection elbow, and one end of the water ring pump connection elbow is connected with a water ring pump. The firebrick sintering furnace of the invention is specially used for sintering refractory materials, has no environmental pollution, high sintering temperature, reduces air pollution, ensures that the sintered product is more compact, and improves the product quality.

Description

Firebrick fritting furnace

Technical Field

The invention relates to the technical field of processing of refractory bricks, in particular to a refractory brick sintering furnace.

Background

The prior art equipment generally adopts a gas furnace for firing, firstly, in order to reduce the porosity of the refractory bricks and improve the quality of the refractory bricks, the forming pressure must be firstly increased. For ordinary refractory bricks, the forming pressure should reach 137 MPa: the forming pressure of the high-density refractory bricks should be in the range of 176-215 MPa. That is, such an effect can be obtained only by molding with an abrasive brick molding machine of 250t or more. The porosity of the refractory brick blank is less than or equal to 23 percent.

The fire-resistant green brick is formed and dried, the moisture content of the formed green brick is generally more than 3.5 percent, the green brick cannot be immediately fired in a kiln, and the moisture is reduced by drying. The drying system of the blank is different according to different forming methods and different single weights of the blank. Drying the blank formed by the semi-dry method in a tunnel dryer, wherein the hot air temperature is 140-160 ℃, the waste gas temperature is 60-90 ℃, and the residual moisture of the blank is less than 2%. A large amount of exhaust gas is generated during the drying process.

The refractory bricks are generally fired by a gas furnace at present, the firing temperature of the refractory bricks is 1390-1400 ℃, the heat preservation time is 24-32 hours, and if the temperature of the refractory bricks to be ultra-high temperature is required to be more than 1800 ℃, the firing temperature of the conventional gas furnace is difficult to reach higher temperature. But also a large amount of harmful gases are volatilized in the process.

The firebrick sintering furnace realizes degassing, drying and high-temperature sintering in a closed state. A vacuum pumping system is designed in the degassing and drying sintering processes to realize vacuum pumping sintering. Therefore, the moisture of the refractory brick is removed cleanly, and the sintering matrix of the refractory brick is more compact.

The prior art devices have the following problems: harmful gases are generated in the production process to pollute the environment, and the sintering temperature is low; the sintered product has low densification and poor product quality.

Disclosure of Invention

The invention mainly aims to provide a refractory brick sintering furnace which can effectively solve the problems stated in the background technology.

In order to achieve the purpose, the invention adopts the technical scheme that:

a firebrick fritting furnace which characterized in that: the furnace comprises a furnace body, wherein a heating electrode interface is arranged on the outer surface of the furnace body, one side of the furnace body is connected with a vacuumizing interface, one end of the vacuumizing interface is connected with a vacuumizing valve, one end of the vacuumizing valve is connected with a vacuum pump opening pipeline, the vacuum pump opening pipeline is connected with a Roots vacuum pump, one side of the Roots vacuum pump is connected with a unit connection corrugated pipe, one end of the unit connection corrugated pipe is connected with a water ring pump valve, the bottom of the water ring pump valve is connected with a water ring pump connection elbow, one end of the water ring pump connection elbow is connected with a water ring pump, one end of the furnace body is connected with a furnace cover, an outer end socket of the furnace cover is provided with a double-layer furnace cover outer end socket, an inner end socket of the furnace cover is provided with a double-layer cylinder body, a furnace cover flange is arranged on one side of the furnace body flange, a furnace body lifting lug is arranged at the top end of the furnace body, a rear cover inner sealing head is arranged at one end of the inner layer of the double-layer barrel, a rear cover outer sealing head is arranged at one end of the outer layer, a water-cooled electrode is connected at one end of the heating electrode interface, an electrode mounting seat is connected at the other end of the heating electrode interface, the electrode mounting seat extends towards the interior of the furnace chamber and is connected with a furnace chamber heating electrode, one end of the furnace chamber heating electrode is connected with a furnace chamber heating element, a heating rod is connected inside the furnace chamber heating element, a heat-insulating material is arranged inside the furnace chamber wall, electrode insulation high-temperature resistant boron nitride ceramics is arranged between the furnace chamber and the furnace chamber heating electrode, one end of the electrode insulation high-temperature resistant boron nitride ceramics is connected with a graphite embedding fixing, the heating furnace hearth is characterized in that a heating furnace hearth penetrating through the furnace pipe is connected to the inner surface of the furnace body, the top end of the heating furnace hearth is connected with a furnace bottom plate, and a workpiece is arranged at the top end of the furnace bottom plate.

Preferably, the firebrick sintering furnace is fixedly connected with a vacuum-pumping system through a vacuum-pumping interface, and the vacuum-pumping system comprises a vacuum-pumping valve, a vacuum pump port pipeline, a roots vacuum pump, a unit connecting corrugated pipe, a water ring pump valve, a water ring pump connecting elbow and a water ring pump.

Preferably, the heating chamber system comprises a hearth heating electrode, a hearth heating element, an electrode mounting seat, a water-cooling electrode, electrode insulation high-temperature-resistant boron nitride ceramics, a graphite embedding fixing piece, a heat insulation material, a heating rod, a workpiece, a heating hearth, a hearth plate, a hearth roller and a hearth roller rail, wherein the heating electrode is of a water-cooling structure, and a heating electrode interface is of a stainless steel flange structure.

Preferably, the hearth heating element is supported by a hearth heating electrode, and the insulating part is made of electrode insulating high-temperature-resistant boron nitride ceramics.

Preferably, the furnace shell capable of being vacuumized of the refractory brick sintering furnace comprises a heating electrode interface, a vacuumizing interface, a double-layer furnace cover inner end socket, a double-layer furnace cover outer end socket, a furnace cover flange, a furnace body lifting lug, a double-layer cylinder body, a rear cover inner end socket and a rear cover outer end socket.

Preferably, the hearth heating electrodes are divided into six groups and are distributed in vertical central symmetry, the furnace body lifting lugs are in vertical central symmetry, and the hearth heating elements are uniformly distributed in the hearth and are distributed in central symmetry.

Compared with the prior art, the invention has the following beneficial effects: this resistant firebrick fritting furnace makes the heating chamber be in vacuum state through vacuum pumping system, and the fritting furnace shell is connected with water circulating system in addition, has changed original sintering condition, has improved the quality of product greatly, has also reduced the pollution to the environment simultaneously.

Drawings

FIG. 1 is a schematic view of the overall structure of a firebrick sintering furnace of the present invention;

FIG. 2 is a schematic structural diagram of a furnace body of a refractory brick sintering furnace according to the invention;

FIG. 3 is a schematic view of the structure A-A of a firebrick sintering furnace of the present invention;

FIG. 4 is a B-B structural schematic diagram of a refractory brick sintering furnace of the invention.

In the figure: 1. heating the electrode interface; 2. vacuumizing the interface; 3. a vacuum valve; 4. a pump port pipeline of a vacuum pump; 5. a Roots vacuum pump; 6. an inner end enclosure of the double-layer furnace cover; 7. an outer end enclosure of the double-layer furnace cover; 8. a furnace lid flange; 9. a furnace body flange; 10. a furnace body lifting lug; 11. a double-layer cylinder body; 12. sealing the inner end of the rear cover; 13. an outer end enclosure of the rear cover; 14. the unit is connected with a corrugated pipe; 15. a water ring pump valve; 16. the water ring pump is connected with the elbow; 17. a water ring pump; 18. a hearth heating electrode; 19. a hearth heating element; 20. an electrode mount; 21. water-cooling the electrode; 22. electrode insulation high temperature resistant boron nitride ceramics; 23. the graphite is embedded with a fixing piece; 24. a thermal insulation material; 25. a heating rod; 26. a workpiece; 27. heating the hearth; 28. a furnace floor; 29. a furnace pipe roller; 30. furnace pipe roller track.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the technical scheme of the invention is further elaborated below.

As shown in figure 1, the refractory brick sintering furnace in the embodiment comprises a furnace body, wherein the outer surface of the furnace body is provided with a heating electrode interface 1, one side of the furnace body is connected with a vacuumizing interface 2, one end of the vacuumizing interface 2 is connected with a vacuumizing valve 3, one end of the vacuumizing valve 3 is connected with a vacuum pump port pipeline 4, the vacuum pump port pipeline 4 is connected with a Roots vacuum pump 5, one side of the Roots vacuum pump 5 is connected with a unit connection corrugated pipe 14, one end of the unit connection corrugated pipe 14 is connected with a water ring pump valve 15, the bottom of the water ring pump valve 15 is connected with a water ring pump connection elbow 16, one end of the water ring pump connection elbow 16 is connected with a water ring pump 17, one end of the furnace body is connected with a furnace cover, the outer layer of the furnace cover is provided with a double-layer outer furnace cover 7, the inner layer of the furnace body is provided with a, a furnace cover flange 8 is arranged on one side of a furnace body flange 9, a furnace body lifting lug 10 is arranged at the top end of the furnace body, a rear cover inner sealing head 12 is arranged at one end of an inner layer of a double-layer cylinder 11, a rear cover outer sealing head 13 is arranged at one end of an outer layer, a water-cooled electrode 21 is connected at one end of a heating electrode interface 1, an electrode mounting seat 20 is connected at the other end of the heating electrode interface 1, a furnace heating electrode 18 is connected to the electrode mounting seat 20 in an extending manner towards the interior of a furnace, a furnace heating element 19 is connected at one end of the furnace heating electrode 18, a heating rod 25 is connected inside the furnace heating element 19, a heat-insulating material 24 is arranged inside the wall of a furnace liner, an electrode insulating high-temperature-resistant boron nitride ceramic 22 is arranged between the furnace liner and the furnace heating electrode 18, a graphite embedding fixing part 23 is connected at one end of the electrode, the inner surface of the furnace body is connected with a heating hearth 27 penetrating through the furnace pipe, the top end of the heating hearth 27 is connected with a furnace bottom plate 28, and the top end of the furnace bottom plate 28 is provided with a workpiece 26.

In the embodiment, the firebrick sintering furnace is fixedly connected with a vacuum-pumping system through a vacuum-pumping interface 2, the vacuum-pumping system comprises a vacuum-pumping valve 3, a vacuum pump opening pipeline 4, a roots vacuum pump 5, a unit connecting corrugated pipe 14, a water ring pump valve 15, a water ring pump connecting elbow 16 and a water ring pump 17, the vacuum unit is designed into two vacuum-pumping pipelines, one pipeline realizes vacuum-pumping for degassing and dewatering by the water ring pump 17 in a low-temperature state, the other pipeline realizes sintering in a high-temperature state, and the roots pump and the water ring pump 17 realize vacuum-pumping simultaneously, so that a sintered product is more compact; the heating chamber system comprises a hearth heating electrode 18, a hearth heating element 19, an electrode mounting seat 20, a water-cooling electrode 21, electrode insulation high-temperature-resistant boron nitride ceramics 22, a graphite embedding fixing piece 23, a heat insulation material 24, a heating rod 25, a workpiece 26, a heating hearth 27, a hearth plate 28, a hearth roller 29 and a hearth roller track 30, wherein the heating electrode adopts a water-cooling structure, a heating electrode interface 1 adopts a stainless steel flange structure, heating current is reduced, eddy current heating caused by magnetic conduction is reduced, and the use temperature can reach the temperature required by sintering in a vacuum state; the hearth heating element 19 is supported by the hearth heating electrode 18, and the insulating part adopts the electrode insulating high-temperature-resistant boron nitride ceramic 22, so that the heat can be well preserved, the heat loss is prevented, and the continuous and stable heating is realized; the furnace shell of the refractory brick sintering furnace capable of being vacuumized comprises a heating electrode interface 1, a vacuumizing interface 2, a double-layer furnace cover inner end socket 6, a double-layer furnace cover outer end socket 7, a furnace cover flange 8, a furnace body flange 9, a furnace body lifting lug 10, a double-layer cylinder 11, a rear cover inner end socket 12 and a rear cover outer end socket 13, the furnace body adopts a double-layer structure, and has good heat insulation and sealing functions, a good working environment can be provided in the sintering process, the interference of other factors is prevented, and the working efficiency and the product quality are improved; the hearth heating electrodes 18 are divided into six groups, the subsections are vertically centrosymmetric, the furnace body lifting lugs 10 are vertically centrosymmetric, the hearth heating elements 19 are uniformly distributed in the hearth and are centrosymmetric subsections, and continuous and stable sintering treatment can be well carried out on the heated workpieces 26.

The invention is to be noted that the invention is a firebrick sintering furnace, the whole equipment realizes the full automatic control, no manual operation is needed except the accident of charging, in the operation process, the furnace door is manually opened, the workpiece 26 is loaded into the furnace, the automatic operation program is opened, the equipment firstly starts the low temperature heating and heat preservation and the vacuum pumping, when the degassing and the dehydration reach a certain value through the pressure sensor (or the time for the dehydration and the degassing is set), the valve is switched to the high vacuum pumping and the temperature rise sintering, the equipment passes through the automatic temperature control system, and after the heating according to the program is finished, the cooling and the discharging can be realized.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.

Claims

1. A firebrick fritting furnace which characterized in that: the furnace comprises a furnace body, wherein a heating electrode interface (1) is arranged on the outer surface of the furnace body, one side of the furnace body is connected with a vacuumizing interface (2), one end of the vacuumizing interface (2) is connected with a vacuumizing valve (3), one end of the vacuumizing valve (3) is connected with a vacuum pump port pipeline (4), the vacuum pump port pipeline (4) is connected with a Roots vacuum pump (5), one side of the Roots vacuum pump (5) is connected with a unit connection corrugated pipe (14), one end of the unit connection corrugated pipe (14) is connected with a water ring pump valve (15), the bottom of the water ring pump valve (15) is connected with a water ring pump connection elbow (16), one end of the water ring pump connection elbow (16) is connected with a water ring pump (17), one end of the furnace body is connected with a furnace cover, a double-layer furnace cover outer end enclosure (7) is arranged on the outer layer of the furnace cover, the furnace is characterized in that a double-layer cylinder body (11) is arranged on the inner wall of the furnace body, a furnace body flange (9) is arranged at one end, close to a furnace cover, of the double-layer cylinder body (11), a furnace cover flange (8) is arranged on one side of the furnace body flange (9), a furnace body lifting lug (10) is arranged at the top end of the furnace body, a rear cover inner sealing head (12) is arranged at one end of the inner layer of the double-layer cylinder body (11), a rear cover outer sealing head (13) is arranged at one end of the outer layer of the double-layer cylinder body (11), a water-cooling electrode (21) is connected to one end of a heating electrode interface (1), an electrode mounting seat (20) is connected to the other end of the heating electrode interface (1), a furnace heating electrode (18) extends towards the interior of the furnace, the inside of stove courage wall is provided with insulation material (24), be provided with electrode insulation high temperature resistant boron nitride pottery (22) between stove courage and furnace heating electrode (18), the one end of electrode insulation high temperature resistant boron nitride pottery (22) is connected with graphite and inlays mounting (23), the bottom of stove courage is connected with stove courage gyro wheel (29), the bottom of stove courage gyro wheel (29) is provided with stove courage gyro wheel track (30), furnace body internal surface is connected with heating hearth (27) that run through the stove courage, the top of heating hearth (27) is connected with bottom plate (28), the top of bottom plate (28) is provided with work piece (26).

2. The refractory brick sintering furnace of claim 1, wherein: the firebrick fritting furnace is fixedly connected with a vacuum-pumping system through a vacuum-pumping interface (2), and the vacuum-pumping system comprises a vacuum-pumping valve (3), a vacuum pump mouth pipeline (4), a Roots vacuum pump (5), a unit connecting corrugated pipe (14), a water ring pump valve (15), a water ring pump connecting elbow (16) and a water ring pump (17).

3. The refractory brick sintering furnace of claim 1, wherein: the heating chamber system comprises a hearth heating electrode (18), a hearth heating element (19), an electrode mounting seat (20), a water-cooling electrode (21), electrode insulation high-temperature-resistant boron nitride ceramics (22), graphite embedding fixing pieces (23), heat insulation materials (24), a heating rod (25), a workpiece (26), a heating hearth (27), a hearth plate (28), a hearth roller (29) and a hearth roller track (30), wherein the heating electrode is of a water-cooling structure, and a heating electrode interface (1) is of a stainless steel flange structure.

4. The refractory brick sintering furnace of claim 1, wherein: the hearth heating element (19) is supported by a hearth heating electrode (18), and an electrode insulation high-temperature-resistant boron nitride ceramic (22) is adopted at an insulation position.

5. The refractory brick sintering furnace of claim 1, wherein: the furnace shell capable of being vacuumized of the refractory brick sintering furnace comprises a heating electrode interface (1), a vacuumizing interface (2), a double-layer furnace cover inner end socket (6), a double-layer furnace cover outer end socket (7), a furnace cover flange (8), a furnace body flange (9), a furnace body lifting lug (10), a double-layer cylinder body (11), a rear cover inner end socket (12) and a rear cover outer end socket (13).

6. The refractory brick sintering furnace of claim 1, wherein: the furnace heating electrodes (18) are divided into six groups, the furnace heating electrodes are vertically and centrally symmetrical in distribution, the furnace body lifting lugs (10) are vertically and centrally symmetrical, and the furnace heating elements (19) are uniformly distributed in the furnace and are centrally symmetrical in distribution.