CN110530146A - High-efficiency sintered furnace - Google Patents

Abstract

The invention discloses a high-efficiency sintering furnace, which belongs to the technical field of sintering equipment. Including the base, furnace body and furnace body lifting components, the middle part of the base is provided with a sintering support, and the sintering support is provided with an inert gas feed distributor, which includes a main feed pipe and a frame-shaped distribution pipe. The frame-shaped distribution pipe is provided with Several inert gas feed holes. The base is also provided with a first sealing groove, a sealing pressing ring and a second sealing groove, the first sealing groove ring is arranged around the sintered support, the sealing pressing ring is arranged outside the first sealing groove, and the second sealing groove ring It is arranged on the outside of the sealing pressure ring to provide three-level sealing for the high-temperature gas in the furnace body. This high-efficiency sintering furnace changes the traditional sintering furnace inert gas feed pipeline structure, and adopts a frame-shaped distribution pipe to distribute the inert gas evenly in the furnace body. At the same time, it cooperates with the "three-level sealing" structure to make the inert gas evenly heated in the furnace body. Prevent the sintered material from being impacted by the local cold inert gas flow, thereby improving the sintering efficiency.

Description

High efficiency sintering furnace

technical field

The invention belongs to the technical field of sintering equipment, and in particular relates to a high-efficiency sintering furnace.

Background technique

The sintering furnace is mainly used for the sintering of ceramic powder, ceramic ferrule and other zirconia ceramics, sintering of diamond saw blades, and can also be used for heat treatment such as annealing of copper and steel strips. It is mainly used in the iron and steel industry, metallurgical industry, and new material industry. Wait. In order to prevent the material to be sintered from being oxidized in the sintering furnace, an inert gas is usually introduced into the sintering furnace for protection.

However, the sintering furnaces provided in the prior art generally adopt a gas path structure that enters from the furnace and then discharges from the furnace. In addition, the sealing performance of the furnace body is not good, forming a cold inert gas flow channel, resulting in poor distribution of the inert gas feed. Even, the heating in the furnace is not uniform enough, which affects the sintering quality of the product and reduces the sintering efficiency. And it is easy to take away the heat in the furnace, which wastes energy and is unfavorable for the sintering process. At the same time, the heated high-temperature inert gas is easy to escape from the sealing defect, forming a hidden danger in production safety.

Contents of the invention

In view of this, the present invention provides a high-efficiency sintering furnace with even distribution of inert gas feed and strict sealing.

The technical solution adopted by the present invention to solve its technical problems is:

A high-efficiency sintering furnace, including a base, a furnace body and a furnace body lifting assembly, the furnace body is installed on the base, and a thermal field is provided inside the furnace body, and the furnace body lifting assembly is connected to the furnace body , the middle part of the base is provided with a sintering support, the sintering support is provided with an inert gas feed distributor, and the two sides of the inert gas feed distributor are provided with sintering supports to carry the sintering vessel; The inert gas feed distributor includes a feed main pipe and a frame-shaped distribution pipe connected to each other, and a number of inert gas feed holes are opened on the frame-shaped distribution pipe;

The bottom of the furnace body is provided with an inner sealing plate, a sealing bead and an outer sealing plate in sequence from the inside to the outside. The base is also provided with an adsorption sealing groove, a sealing pressure ring and a barrier sealing groove. The adsorption sealing groove ring is set on the Around the sintered support, the sealing pressure ring is set on the outside of the adsorption sealing groove, and the barrier sealing groove ring is set on the outside of the sealing pressure ring;

The adsorption sealing groove is filled with solid adsorption particles, and the inner sealing plate is buried in the solid adsorption particles to absorb and seal the sintering flue gas; the sealing bead is attached to the sealing pressure ring to protect the sintering The flue gas is sealed twice; the barrier sealing groove is filled with a barrier agent, and the outer sealing plate is inserted in the barrier agent to seal the sintering flue gas three times.

Preferably, the frame-shaped distribution pipe includes a vertical pipe and a horizontal pipe, the feed main pipe is connected to the middle of the vertical pipe, and the distance between two adjacent inert gas feeding holes on the vertical pipe is determined by the The connection between the main feeding pipe and the vertical pipe gradually becomes smaller toward both sides, and the distance between two adjacent inert gas feeding holes on the horizontal pipe is the same.

Preferably, several balance cylinders are provided on the outside of the base, the balance cylinders include a fixed end and a telescopic end, the fixed end is hinged on the base, and the telescopic end is used to carry the furnace body.

Preferably, the lifting assembly of the furnace body includes a gantry frame, a lifting power part, a lifting pulley block and a suspension rope, a chute is opened on the column of the gantry frame, and a pulley is arranged on the side wall of the furnace body, and the pulley Slidingly connected in the chute; the lifting pulley block is installed on the beam of the gantry frame, one end of the sling is connected to the upper end of the furnace body, and the other end is connected to the lifting power by bypassing the lifting pulley block The output end of the piece, the lifting power piece outputs power, and the lifting pulley block changes the direction of moment to make the furnace body rise and fall relative to the column of the gantry.

Preferably, the column of the gantry is further provided with a furnace body support, and the support of the furnace body is hinged on the column of the gantry.

Preferably, the high-efficiency sintering furnace further includes a flue gas integrated disposal assembly, the flue gas integrated disposal assembly includes a flue gas outlet pipe and a fume collection hood, the flue gas outlet pipe is inserted into the furnace body, and one end Connected to the interior of the furnace body, the fume collecting hood is installed on the lifting assembly of the furnace body and is located above the flue gas outlet pipe to collect the sintered gas that escapes from the furnace body through the flue gas outlet pipe. smoke.

Preferably, the flue gas integrated treatment assembly further includes a gas pipe and a fire arrester, the gas pipe is connected to the upper end of the flue gas outlet pipe, the fire arrester is installed on the furnace body, and is located on the Above the flue gas outlet pipe.

Preferably, the furnace body includes a hot field part and a furnace top, the upper end of the hot field part is sealed, and the furnace top is detachably connected to the upper end of the hot field part.

Preferably, several suspension rings are provided on the furnace roof, and suspension buckles equal in number to the suspension rings are provided on the hot field part, and the suspension rings can be clamped and connected to the suspension buckles.

Preferably, a temperature detector is installed on the thermal field part to monitor the temperature inside the thermal field part.

It can be known from the above technical solution that the present invention provides a high-efficiency sintering furnace, which has the beneficial effects of: changing the traditional sintering furnace inert gas feed pipeline structure, using the frame-shaped distribution pipe to make the inert gas evenly distributed in the furnace body, At the same time, it cooperates with the "three-level sealing" structure to achieve strict sealing, prevent the formation of cold inert gas flow channels, and then make the inert gas evenly heated in the furnace body, prevent the sintered material from being impacted by local cold inert gas flow, and affect the sintering quality, thereby improving sintering efficiency. At the same time, the "three-level sealing" structure is beneficial to prevent high-temperature gas from escaping from sealing defects, causing deterioration of the workplace environment, and even personnel scalding accidents.

Description of drawings

Figure 1 is a schematic diagram of the structure of a high-efficiency sintering furnace.

Fig. 2 is a schematic diagram of the structure of the high-efficiency sintering furnace in the open state.

Fig. 3 is a top view of the base.

Fig. 4 is a partially enlarged view of part B shown in Fig. 3 .

Fig. 5 is a schematic cross-sectional view of the high-efficiency sintering furnace shown in Fig. 1 .

Fig. 6 is a partially enlarged view of part C shown in Fig. 5 .

Fig. 7 is a schematic cross-sectional view from another angle of the high-efficiency sintering furnace shown in Fig. 1 .

Fig. 8 is a partially enlarged view of part A shown in Fig. 1 .

Fig. 9 is a schematic diagram of the structure of a high-efficiency sintering furnace in a cooling state.

In the figure: high-efficiency sintering furnace 10, vessel 20, base 100, sintering support 110, inert gas feed distributor 120, feed main pipe 121, frame-shaped distribution pipe 122, inert gas feed hole 1201, longitudinal pipe 1221, horizontal Pipe 1222, sintering support 130, adsorption sealing groove 141, sealing pressure ring 142, barrier sealing groove 143, balance cylinder 150, fixed end 151, telescopic end 152, furnace body 200, pulley 201, inner sealing plate 202, sealing bead 203, Outer sealing plate 204, thermal field part 210, lifting buckle 211, furnace top 220, lifting ring 221, temperature detector 212, furnace body lifting assembly 300, gantry frame 310, chute 311, furnace body bracket 312, lifting power part 320, lifting Pulley block 330 , flue gas integrated treatment assembly 400 , flue gas outlet pipe 420 , fume collecting hood 410 , gas pipe 430 , and fire retardant 440 .

Detailed ways

The technical solutions and technical effects of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings of the present invention.

Please refer to Fig. 1 and Fig. 2, in one embodiment, a high-efficiency sintering furnace 10 includes a base 100, a furnace body 200 and a furnace body lifting assembly 300, the furnace body 200 is installed on the base 100, and the A heat field is provided inside the furnace body 200 , and the furnace body lifting assembly 300 is connected to the furnace body 200 . During sintering, the furnace body 200 is lifted upwards, the vessel 20 of the material to be sintered is placed on the base 100, the furnace body 200 is covered, and the thermal field is heated for high-temperature sintering.

Please refer to Fig. 3 to Fig. 6, the middle part of the base 100 is provided with a sintered support 110, the sintered support 110 is provided with an inert gas feed distributor 120, and the two sides of the inert gas feed distributor 120 are provided There is a sintering support 130 to support the vessel 20 for sintering. The inert gas feed distributor 120 includes a feed main pipe 121 and a frame-shaped distribution pipe 122 connected to each other, and a plurality of inert gas feed holes 1201 are opened on the frame-shaped distribution pipe 122 .

The inert gas enters through the feed main pipe 121, enters the frame-shaped distribution pipe 122, and evenly escapes into the inner cavity of the furnace body 200 through the inert gas feed hole 1201, ensuring the uniformity of the feed. Uniformity, preventing the sintered material from being impacted locally by low-temperature inert gas, affecting the sintering quality of the product and reducing the sintering efficiency.

The bottom of the furnace body 200 is sequentially provided with an inner sealing plate 202, a sealing bead 203 and an outer sealing plate 204 from the inside to the outside, and the base is also provided with an adsorption sealing groove 141, a sealing pressure ring 142 and a barrier sealing groove 143. The adsorption sealing groove 141 is arranged around the sintering support 110, the sealing pressure ring 142 is arranged outside the adsorption sealing groove 141, and the barrier sealing groove 143 is arranged on the outer side of the sealing pressure ring 142. outside.

The adsorption sealing groove 141 is filled with solid adsorption particles, and the inner sealing plate 202 is buried in the solid adsorption particles to adsorb and seal the sintering flue gas once. The sealing bead 203 is attached to the sealing pressure ring 142 to perform secondary sealing on the sintering flue gas. The blocking and sealing groove 143 is filled with a blocking agent, and the outer sealing plate 204 is inserted in the blocking agent to seal the sintering flue gas three times.

During production, the adsorption sealing groove 141 is filled with fine sand, and the inner sealing plate 202 is buried in the fine sand to realize the first-stage sand sealing. Preliminary removal of macromolecular harmful substances in sintering flue gas. The sealing pressure ring 142 is a high temperature resistant elastic rubber pad, and the sealing pressure strip 203 is attached to the sealing pressure ring 142 and pressed tightly to realize the second-stage pressure ring sealing. The second sealing groove 143 is filled with cooling water, and the outer sealing plate 204 is inserted into the cooling water to realize a third-level water seal.

The above-mentioned "three-stage sealing" mechanism is adopted to realize strict sealing on the junction of the furnace body 200 and the base 100 to prevent seal failure. After the cold inert gas enters the furnace body, it escapes directly from the sealing defect. The heat in the furnace is taken away, resulting in waste of energy, which is not conducive to the sintering process. At the same time, some harmful substances in the sintering flue gas are removed through the adsorption and filtration of solid adsorption particles and the absorption of cooling water.

At the same time, if the first-level seal and the second-level seal fail, a little high-temperature gas escapes and is cooled by the cooling water of the third-level seal, reducing the safety risk of high-temperature gas scalding personnel. If the amount of dissipated high-temperature gas is large, the cooling water at the third-stage seal will be vaporized to form a large amount of water vapor to warn the operator of equipment failure, stay away from the scene, and prevent burns.

In a preferred embodiment, the frame-shaped distribution pipe 122 includes a vertical pipe 1221 and a horizontal pipe 1222, the feed main pipe 121 is connected to the middle of the vertical pipe 1221, and two adjacent The distance between the inert gas feed holes 1201 gradually decreases from the junction of the feed main pipe 121 and the vertical pipe 1221 to both sides, and the adjacent two inert gas feed holes on the horizontal pipe 1222 The holes 1201 are equally spaced. The inert gas is passed into the feed main pipe 121, and the pressure near the junction of the feed main pipe 121 and the vertical pipe 1221 is relatively high, and reducing the density of the inert gas feed holes 1201 is beneficial to ensure the uniformity of the inert gas. distribution, while the inert gas pressure at the longitudinal tube 1221 and the horizontal tube 1222 far away from the junction of the feed main pipe 121 and the vertical tube 1221 gradually decreases, increasing the density of the inert gas feed hole 1201 is conducive to Ensure uniform distribution of inert gas.

In yet another preferred embodiment, a number of balance cylinders 150 are provided on the outside of the base 100, the balance cylinders 150 include a fixed end 151 and a telescopic end 152, the fixed end 151 is hinged on the base 100, the The telescopic end 152 is used to support the furnace body 200 . After the installation of the furnace body 200 and the base 100 is completed, fine-tune the balance cylinder 150 so that the furnace body 200 maintains a balance relative to the base 100 and avoid the deflection of the furnace body 200. Seal failure. Secondly, the balance cylinder 150 gives an upward supporting force to the furnace body 200 to prevent the furnace body 200 from over-extruding the sealing pressure ring 142 and causing the accelerated damage of the sealing pressure ring 142 .

Please refer to Fig. 7 together. In a specific embodiment, the furnace body lifting assembly 300 includes a gantry frame 310, a lifting power part 320, a lifting pulley block 330 and a lifting rope 340, and a chute is opened on the column of the gantry frame 310. 311 , a pulley 201 is provided on the side wall of the furnace body 200 , and the pulley 201 is slidably connected in the slide groove 311 . The lifting pulley block 330 is installed on the beam of the gantry 310, one end of the suspension rope 340 is connected to the upper end of the furnace body 200, and the other end is connected to the output of the lifting power part 320 by bypassing the lifting pulley block 330 At the end, the lifting power member 320 outputs power, and the lifting pulley block 330 changes the direction of moment, so that the furnace body 200 is lifted relative to the column of the gantry 310 .

Further, the column of the gantry 310 is also provided with a furnace body support 312 , and the furnace body support 312 is hinged on the column of the gantry 310 . Before sintering and after sintering, the furnace body 200 is lifted up to be higher than the furnace body support 312 by the furnace body lifting assembly 300, the furnace body support 312 is rotated, and placed on the bottom of the furnace body 200, giving The upward supporting force of the furnace body 200 reduces the load of the lifting power part 320 and prolongs its service life. Secondly, to prevent the lifting power part 320 from suddenly failing, the furnace body 200 is accelerated to descend, causing equipment damage or casualties.

Please refer to FIG. 8 together. In yet another embodiment, the high-efficiency sintering furnace 10 further includes a flue gas integrated disposal assembly 400, and the flue gas integrated disposal assembly 400 includes a flue gas outlet pipe 420 and a fume collection hood 410. The flue gas outlet pipe 420 is plugged into the furnace body 200, and one end is connected to the inside of the furnace body 200. The fume collecting hood 410 is installed on the furnace body lifting assembly 300 and is located on the flue gas outlet pipe. 420 to collect the sintering flue gas that escapes from the furnace body 200 through the flue gas outlet pipe 420 . During the operation of the sintering furnace, part of the inert gas carries the flue gas generated during the sintering process of the sintered materials and escapes from the flue gas outlet pipe 420, and the escaped flue gas is collected by the fume collecting hood 410 , and concentrate on the discharge to avoid the pollution of the workplace environment and the atmospheric environment by the escaped smoke. The flue gas outlet pipe 420 provides an inert gas circulation and circulation channel, so as to be able to remove part of the high-temperature contaminated inert gas in time, and supplement part of the fresh inert gas to maintain the pressure balance in the furnace body 200 and prevent high Concentrated flue gas is enriched in the furnace body for a long time, resulting in a decrease in the quality of sintered products and sintering efficiency.

Further, the flue gas integrated treatment assembly 400 also includes a gas pipe 430 and a fire arrester 440, the gas pipe 430 is connected to the upper end of the flue gas outlet pipe 420, and the fire arrester 440 is installed on the furnace body 200 and above the flue gas outlet pipe 420 .

In order to ensure the sintering efficiency and the highest sintering temperature of the sintering furnace, the furnace body 200 usually has a thicker furnace wall to minimize heat exchange between the furnace body 200 and the environment. This results in a longer cooling time after sintering is complete. To solve this problem, please refer to Fig. 9. In another preferred embodiment, the furnace body 200 includes a heat field part 210 and a furnace top 220, the upper end of the heat field part 210 is sealed, and the furnace top 220 is detachably connected to the upper end of the thermal field part 210 . Before the sintering starts, the furnace top 220 is covered on the upper end of the hot field part 210 to reduce the heat exchange between the inside of the hot field part 210 and the environment. After the sintering is completed, the furnace top 220 is lifted. The heat exchange efficiency between the top of the heat field part 210 and the environment is increased, thereby shortening the cooling time.

Specifically, the furnace roof 220 is provided with a number of suspension rings 221 , and the hot field part 210 is provided with suspension buckles 211 equal in number to the suspension rings 221 , and the suspension rings 221 can be clamped and connected to the suspension buckles 211 . After sintering, when it is necessary to cool the sintered product in the hot field part 210, open the connection between the suspension ring 221 and the suspension buckle 211, and the furnace body lifting assembly 300 drives the furnace top 220 to lift upward , and is separated from the thermal field part 210 for natural cooling. After the temperature drops to the specified process target, cover the furnace top 220 on the upper end of the hot field part 210, and after engaging the lifting ring 221 and the hanging buckle 211, connect the furnace top 220 and the hot field part 210 is lifted up as a whole to take out the sintered finished product.

Further, the thermal field part 210 is provided with a temperature detector 212 to monitor the temperature inside the thermal field part 210 .

What is disclosed above is only a preferred embodiment of the present invention, and certainly cannot limit the scope of rights of the present invention with this. Those of ordinary skill in the art can understand the whole or part of the process of realizing the above-mentioned embodiment, and make according to the claims of the present invention The equivalent changes still belong to the scope covered by the invention.

Claims (10)

1. a kind of high-efficiency sintered furnace, including pedestal, furnace body and furnace body lifting assembly, the furnace body are installed on the pedestal, and The furnace body inside is provided with thermal field, and the furnace body lifting assembly connects the furnace body, which is characterized in that the middle of the base is set It is equipped with sintering support, inert gas feed distributor is provided on the sintering support, the inert gas feed distributor Two sides are provided with sintering bracket, to carry sintering vessel；The inert gas feed distributor includes charging interconnected General pipeline and frame-type distribution pipe offer several inert gas feed openings in the frame-type distribution pipe；

The bottom of furnace body is disposed with inner sealing plate, seal trim strip and external seal plate from inside to outside, also sets on the pedestal It is equipped with absorption seal groove, seal joint and blocking seal groove, the absorption seal groove to be located on around the sintering support, institute The outside that seal joint is located on the absorption seal groove is stated, the blocking seal groove is located on the outside of the seal joint；

Filled solid adsorbs particle in the absorption seal groove, and the inner sealing plate is embedded in solid absorption particle, to burning Knot flue gas carries out absorption and once sealing；The seal trim strip is bonded with the seal joint, secondary to carry out to sintering flue gas Sealing；Barrier is filled in the blocking seal groove, the external seal plate is inserted in barrier, to carry out three to sintering flue gas Secondary sealing.

2. high-efficiency sintered furnace as described in claim 1, which is characterized in that the frame-type distribution pipe includes longitudinal tubule (L tubule) and transverse tube, institute It states charging general pipeline to be connected in the middle part of the longitudinal tubule (L tubule), the spacing of the two neighboring inert gas feed opening on the longitudinal tubule (L tubule) is by institute State charging general pipeline and the longitudinal tubule (L tubule) junction gradually become smaller to two sides, the two neighboring inert gas on the transverse tube into Expect that the spacing in hole is identical, so that inert gas charging is evenly distributed.

3. high-efficiency sintered furnace as described in claim 1, which is characterized in that be provided with several Balance Airs on the outside of the pedestal Cylinder, the balance cylinder include fixing end and telescopic end, and the fixing end is articulated on the pedestal, and the telescopic end is for holding Carry the furnace body.

4. the high-efficiency sintered furnace as described in any one of claims 1 to 3, which is characterized in that the furnace body lifting assembly packet It includes portal frame, promote force piece, lifting tackle group and lifting rope, offer sliding slot on the column of the portal frame, the furnace body Pulley is provided on side wall, the pulley is slidably connected in the sliding slot；The lifting tackle group is installed on the portal frame Crossbeam on, described lifting rope one end connects the upper end of the furnace body, and the other end is connected to described mention around the lifting tackle group The output end of force piece is risen, the promotion force piece output power, the lifting tackle group changes torque direction, so that the furnace The column up-down of the relatively described portal frame of body.

5. high-efficiency sintered furnace as claimed in claim 4, which is characterized in that be additionally provided with furnace body branch on the column of the portal frame Frame, the furnace body support are articulated on the column of the portal frame.

6. the high-efficiency sintered furnace as described in any one of claims 1 to 3 or 5, which is characterized in that the high-efficiency sintered furnace is also Including the integrated disposition component of flue gas, the integrated disposition component of the flue gas includes flue gas delivery line and exhaust fume collecting hood, the flue gas export Pipe is plugged on the furnace body, and one end is connected to the furnace interior, and the exhaust fume collecting hood is installed in the furnace body lifting assembly, And it is located at the top of the flue gas delivery line, to collect the sintering flue gas by going out in furnace body by the flue gas delivery line loss.

7. high-efficiency sintered furnace as claimed in claim 6, which is characterized in that the integrated disposition component of the flue gas further includes fuel gas conduit And back-fire relief part, the fuel gas conduit are connected to flue gas delivery line upper end, the back-fire relief part is installed on the furnace body, and is located at Above the flue gas delivery line.

8. high-efficiency sintered furnace as claimed in claim 1 or 7, which is characterized in that the furnace body includes thermal field portion and furnace roof portion, institute The upper end sealing in thermal field portion is stated, the furnace roof portion is removably connected to the upper end in the thermal field portion.

9. high-efficiency sintered furnace as claimed in claim 8, which is characterized in that several hanging rings are provided in the furnace roof portion, it is described It is provided in thermal field portion and the hanging ring quantity is equal withholds, the hanging ring can be clamped described in connection and withhold.

10. high-efficiency sintered furnace as claimed in claim 8, which is characterized in that it is provided with temperature monitor in the thermal field portion, with Monitor the temperature inside the thermal field portion.