CN210154326U - Suspension furnace combustion chamber masonry structure - Google Patents

Suspension furnace combustion chamber masonry structure Download PDF

Info

Publication number
CN210154326U
CN210154326U CN201920814724.8U CN201920814724U CN210154326U CN 210154326 U CN210154326 U CN 210154326U CN 201920814724 U CN201920814724 U CN 201920814724U CN 210154326 U CN210154326 U CN 210154326U
Authority
CN
China
Prior art keywords
brick
layer mullite
silicon carbide
heat insulation
insulation layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn - After Issue
Application number
CN201920814724.8U
Other languages
Chinese (zh)
Inventor
毕胜民
董宝华
孙希忠
赵�权
秦楠
钟刚
王飞
石生凯
王新星
王耶
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HAICHENG DONGHE TAIDI METALLURGICAL FURNACE MATERIAL Co Ltd
Original Assignee
HAICHENG DONGHE TAIDI METALLURGICAL FURNACE MATERIAL Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HAICHENG DONGHE TAIDI METALLURGICAL FURNACE MATERIAL Co Ltd filed Critical HAICHENG DONGHE TAIDI METALLURGICAL FURNACE MATERIAL Co Ltd
Priority to CN201920814724.8U priority Critical patent/CN210154326U/en
Application granted granted Critical
Publication of CN210154326U publication Critical patent/CN210154326U/en
Withdrawn - After Issue legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

A suspension furnace combustion chamber masonry structure comprises a large straight section, a cone section, a small straight section, a tuyere and a fire observation hole, wherein a working layer mullite silicon carbide brick I and a heat insulation layer mullite light-gathering brick I are sequentially built in the large straight section from inside to outside; the tuyere and the fire observation hole are prefabricated casting pieces, and are respectively built on the furnace wall of the large straight section through a working layer mullite silicon carbide brick I and a heat insulation layer mullite light-gathering brick I; sequentially building a working layer mullite silicon carbide brick II and a heat insulation layer mullite light-weight brick II from inside to outside in the vertebral body section; the side surfaces of the working layer mullite silicon carbide brick II and the heat insulation layer mullite light brick II are parallelograms; the small straight section is sequentially built with a working layer mullite silicon carbide brick III and a heat insulation layer mullite light brick III from inside to outside. The utility model discloses the furnace body adopts the dry-type to build by laying bricks or stones manufacturing, can directly build by laying bricks or stones the shaping on the station that suspension stove combustion chamber was assembled, and construction process is simple, need not to calcine, the energy can be saved, long service life.

Description

Suspension furnace combustion chamber masonry structure
Technical Field
The utility model relates to a refractory material application especially relates to a suspension stove combustion chamber masonry structure.
Background
The stations of the suspension furnace combustion chamber are generally arranged transversely and are vertically communicated with the vertically arranged working chamber. At present, a heat preservation layer and a working layer of an inner furnace wall of a suspension furnace combustion chamber are both cast, the furnace body is required to be vertically arranged in sections in the machining mode for casting, after casting is completed, calcination, reinforcement and forming are required to be carried out, and then each section of the furnace body is rotated to a transverse position for assembly. The processing technology is very complicated, the processing difficulty is high, and the casting is wet processing, so that calcination, drying and reinforcement are needed, the manufacturing cost is increased, and heat resources are wasted.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a suspension furnace combustion chamber masonry structure, a furnace body is manufactured by dry masonry, can be directly shaped on the assembled station of the suspension furnace combustion chamber by masonry, has simple construction process, does not need calcination, and saves energy; the brick body is adopted for building, so that the construction strength is high, and the brick is firm, durable and long in service life.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a suspension furnace combustion chamber masonry structure comprises a large straight section, a conical section, a small straight section, a tuyere and a fire observation hole, wherein a working layer mullite silicon carbide brick I and a heat insulation layer mullite light-gathering brick I are sequentially built in the large straight section from inside to outside; the tuyere and the fire observation hole are prefabricated pouring pieces, and are respectively built on the furnace wall of the large straight section through a working layer mullite silicon carbide brick I and a heat insulation layer mullite light-gathering brick I; the conical section is sequentially built with a working layer mullite silicon carbide brick II and a heat insulation layer mullite light-gathering brick II from inside to outside; the side surfaces of the working layer mullite silicon carbide brick II and the heat insulation layer mullite light brick II are parallelograms; and the small straight section is sequentially built with a working layer mullite silicon carbide brick III and a heat insulation layer mullite light-weight brick III from inside to outside.
The long sides of the parallelograms of the working layer mullite silicon carbide bricks II are smaller than the height of the working layer mullite silicon carbide bricks I, the long sides of the parallelograms of the heat insulation layer mullite light weight bricks II are smaller than the height of the heat insulation layer mullite light weight bricks I, the height of the working layer mullite silicon carbide bricks III is equal to the long sides of the parallelograms of the working layer mullite silicon carbide bricks II, and the height of the heat insulation layer mullite light weight bricks III is equal to the long sides of the parallelograms of the heat insulation layer mullite light weight bricks II.
And the heat insulation plate is stuck between the heat insulation layer mullite light-gathering brick I and the metal furnace shell, the heat insulation plate is stuck between the heat insulation layer mullite light-gathering brick II and the metal furnace shell, and the heat insulation plate is stuck between the heat insulation layer mullite light-gathering brick III and the metal furnace shell.
The working layer mullite silicon carbide brick I, the heat-insulating layer mullite light-gathering brick I, the working layer mullite silicon carbide brick II, the heat-insulating layer mullite light-gathering brick II, the working layer mullite silicon carbide brick III and the heat-insulating layer mullite light-gathering brick III are all wedge-shaped bricks with one large end and the other small end.
The outer end of the fire observation hole is hinged with a fire observation door.
Compared with the prior art, the beneficial effects of the utility model are that:
1) the utility model discloses can assemble suspension stove combustion chamber metal furnace shell, direct mount directly builds by laying bricks or stones on horizontal station on the furnace body station, need not to reverse the furnace body, construction simple process, labour saving and time saving, the security is high.
2) The utility model discloses a furnace body is built by laying bricks or stones for the dry-type, and the brick body is directly built by laying bricks or stones, need not wet-type fire-resistant binder, and in use directly calcines, and brick joint is filled in the expansion of the brick body, need not to calcine dry forming in advance, and the energy can be saved saves processing manufacturing cost.
3) The utility model discloses a brick body is built by laying bricks or stones, and bulk strength is high, and is durable, long service life.
Drawings
FIG. 1 is a front cross-sectional view of the combustion chamber masonry structure of the suspension furnace of the present invention.
Fig. 2 is a view from B-B of fig. 1.
Fig. 3 is a view from a-a of fig. 1.
FIG. 4 is a schematic view of a mullite light brick I with an insulating layer.
Fig. 5 is a side view of fig. 4.
FIG. 6 is a schematic representation of a working layer mullite silicon carbide brick I.
Fig. 7 is a side view of fig. 6.
FIG. 8 is a schematic view of a mullite lightweight brick III as an insulating layer.
Fig. 9 is a side view of fig. 8.
FIG. 10 is a schematic view of a working layer mullite SiC brick III.
Fig. 11 is a side view of fig. 10.
FIG. 12 is a schematic view of a mullite lightweight brick II with an insulating layer.
Fig. 13 is a side view of fig. 12.
FIG. 14 is a schematic representation of the working layer mullite silicon carbide brick II.
Fig. 15 is a side view of fig. 14.
Fig. 16 is a schematic view of the erection of the vertebral segment arch.
Fig. 17 is a side view of the arch of the cone.
Fig. 18 is a top view of the arch of the cone.
Fig. 19 is an overall structural schematic view of the tuyere block.
Fig. 20 is a side view of fig. 19.
Fig. 21 is a top view of fig. 19.
Fig. 22 is a casting mold for the preform block.
In the figure: 1-heat insulation plate, 2-heat insulation layer mullite light-weight brick I, 3-metal furnace shell, 4-flange, 5-working layer mullite silicon carbide brick I, 6-furnace mouth heat insulation layer mullite light-weight brick, 7-furnace mouth working layer mullite silicon carbide brick, 8-heat insulation layer mullite light-weight brick II, 9-working layer mullite silicon carbide brick II, 10-heat insulation layer mullite light-weight brick III, 11-working layer mullite silicon carbide brick III, 12-working chamber, 13-tuyere prefabricated casting material, 14-tuyere prefabricated block, 15-flame-observing hole prefabricated part, 16-large straight section, 17-flame-observing hole, 18-tuyere, 19-cone section, 20-small straight section, 21-section steel support, 22-cone section arch frame, 23-steel pipe, 24-mold shell, 25-mold spacer.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
referring to fig. 1-21, a suspension furnace combustion chamber masonry structure comprises a large straight section 16, a conical section 19, a small straight section 20, a tuyere 18 and a fire observation hole 17, wherein the large straight section 16 is sequentially provided with a working layer mullite silicon carbide brick I5 and a heat insulation layer mullite light-weight brick I2 from inside to outside; the tuyere 18 and the fire observation hole 17 are prefabricated casting pieces, and the tuyere 18 and the fire observation hole 17 are respectively built on the furnace wall of the large straight section 16 through a working layer mullite silicon carbide brick I5 and a heat insulation layer mullite light brick I2; the conical section 19 is sequentially built with a working layer mullite silicon carbide brick II 9 and a heat insulation layer mullite light-gathering brick II 8 from inside to outside; the side surfaces of the working layer mullite silicon carbide brick II 9 and the heat insulation layer mullite light brick II 8 are parallelograms; the small straight section 20 is sequentially built with a working layer mullite silicon carbide brick III 11 and a heat insulation layer mullite light-weight brick III 10 from inside to outside.
The long side of the parallelogram of the working layer mullite silicon carbide brick II 9 is smaller than the height of the working layer mullite silicon carbide brick I5, the long side of the parallelogram of the heat-insulating layer mullite light-gathering brick II 8 is smaller than the height of the heat-insulating layer mullite light-gathering brick I2, the height of the working layer mullite silicon carbide brick III 11 is equal to the long side of the parallelogram of the working layer mullite silicon carbide brick II 9, and the height of the heat-insulating layer mullite light-gathering brick III 10 is equal to the long side of the parallelogram of the heat-insulating layer mullite light-gathering brick II 8.
And the heat insulation plate 1 is stuck between the heat insulation layer mullite light-gathering brick I2 and the metal furnace shell 3, the heat insulation plate 1 is stuck between the heat insulation layer mullite light-gathering brick II 8 and the metal furnace shell 3, and the heat insulation plate 1 is stuck between the heat insulation layer mullite light-gathering brick III 10 and the metal furnace shell 3.
The working layer mullite silicon carbide brick I5, the heat-insulating layer mullite light-weight brick I2, the working layer mullite silicon carbide brick II 9, the heat-insulating layer mullite light-weight brick II 8, the working layer mullite silicon carbide brick III 11 and the heat-insulating layer mullite light-weight brick III 10 are all wedge-shaped bricks with one large end and the other small end.
The outer end of the fire observation hole 17 is hinged with a fire observation door.
As shown in fig. 1 and 2, the metal shell 3 is divided into several segments, which are connected into a whole by flanges 4. The bottom is fixed transversely by a support, and one end of the furnace shell is connected with a suspension furnace working chamber 12. A furnace mouth heat-insulating layer mullite light-weight brick 6 and a furnace mouth working layer mullite silicon carbide brick 7 are also built at the furnace mouth.
The tuyere 18 is divided into two parts, one part is a tuyere prefabricated casting material 13, the other part is a tuyere prefabricated block 14, and the tuyere prefabricated casting material 13 is prefabricated and cast to the tuyere inclined section of the processed metal furnace shell 3 in advance and is combined and assembled with the metal furnace shell 3. The tuyere precast block 14 is cast and molded by using a precast block casting mold as shown in fig. 22. The precast block pouring mold comprises a mold partition plate 25, a mold shell 24 and a steel pipe 23, wherein the 4 mold partition plates 25 are arranged in the mold shell 24 in parallel, the steel pipe 23 penetrates through the mold shell 24 and the mold partition plates 25, when the pouring mold is horizontally placed, the axis of the steel pipe 23 is consistent with the axis direction of a ventilation hole of the horizontally placed air opening precast pouring material 13, and the inner diameter of the steel pipe 23 is the same as the diameter of the ventilation hole of the air opening precast pouring material 13. The number of the air outlet precast blocks to be poured is 5, and after the 5 air outlet precast blocks 14 are combined together, the vent holes in the precast blocks and the reserved vent holes in the air outlet precast pouring material 13 are coaxial and have the same diameter. See fig. 19-21 for the structural schematic view of the 5 tuyere block 14 masonry. The hatched area in the figure is the vent hole.
When the tuyere precast blocks 14 are built, a working layer mullite silicon carbide brick I5 and a heat insulation layer mullite light weight brick I2 are built to a specified height according to the drawing size, a ramming mass is used for leveling, then the tuyere precast blocks 14 are sequentially built at the tuyere 18 respectively, and the circle center of the tuyere precast blocks is on the same horizontal plane as that of the metal furnace shell 3. The mullite silicon carbide brick I5 on the working layer and the mullite light brick I2 on the insulating layer on two sides need to be built according to a whole-ring mode, and the mullite silicon carbide brick I5 and the mullite light brick I2 on the insulating layer do not need to be built in a brick cutting mode according to the whole-ring mode. When the tuyere precast block 14 is built, the tuyere precast block 14 is kept horizontal and is close to the metal furnace shell 3, and the back seam filler is full. The fire-viewing hole prefabricated member 15 is also built in the same way.
A masonry process of a suspension furnace combustion chamber masonry structure comprises the following steps:
1) installing the metal furnace shell 3 according to the working position to manufacture an arch frame;
2) firstly, building a lower semicircular refractory material, starting building from the large straight section 16, sticking the heat insulation plate 1 on the metal furnace shell 3 by using refractory mortar, building a heat insulation layer mullite light-weight brick I2 on the heat insulation plate 1, starting building from the furnace mouth end, building at staggered joints, when building 4-5 rings by using a heat insulation layer mullite light-weight brick I2, building a working layer mullite silicon carbide brick I5 at the staggered joint of the upper end of a heat insulation layer mullite light-weight brick I2, then continuing building a heat insulation layer mullite light-weight brick I2, and finishing building the lower semicircular refractory material of the large straight section 16 by adopting the mode;
3) building heat-insulating layer mullite light-weight brick I2 and working layer mullite silicon carbide brick I5 below the tuyere 18 and the fire observation hole 17 at the tuyere 18 and the fire observation hole 17, leveling by using a ramming mass, building the tuyere precast block 14 and the fire observation hole precast block 15 at the tuyere 18 and the fire observation hole 17 respectively, and building the heat-insulating layer mullite light-weight brick I2 and the working layer mullite silicon carbide brick I5 at two sides according to a whole-ring mode; tamping gaps between the tuyere precast block 14 and the fire observation hole precast member 15 and the metal furnace shell 3 by using a tamping material;
4) the lower semicircular refractory material of the conical section 19 is built, a layer of heat insulation plate 1 is also pasted, a layer of heat insulation layer mullite light-gathering brick II 8 is built, when 4-5 rings are built, a layer of working layer mullite silicon carbide brick II 9 is built, the parallel square side faces of the heat insulation layer mullite light-gathering brick II 8 and the working layer mullite silicon carbide brick II 9 are built along the axial direction of the furnace body, the big end of the wedge is downward, the small end of the wedge is upward, the conical section brick and the big straight section brick are ensured to be matched and joint-pasted to be built during building, the conical section brick and the big straight section brick are built in a dry building mode, and the lower semicircular furnace shell of the conical section;
5) building a semicircular refractory material under the small straight section 20 in the same way as the large straight section 16, pasting a layer of heat-insulating plate 1, building a layer of heat-insulating layer mullite light-gathering brick III 10, and building a layer of working layer mullite silicon carbide brick III 11 when building 4-5 rings;
6) after the lower semicircle of the furnace body is built, an arch center is built, and the erection height of the arch center is the building height of the upper arc surface of the arch center which is the working layer of the upper semicircle of the furnace body; building an arch from a furnace mouth, building the top of the arch in a reverse building manner, building a working layer mullite silicon carbide brick I5 on the arch, and then building a heat-insulating layer mullite light-weight brick I2 on the working layer mullite silicon carbide brick I5, wherein the wedge-shaped small end of a brick body faces downwards, and the big end faces upwards; and then placing the heat insulation plate 1, tamping a gap between the metal furnace shell 3 and the heat insulation plate 1 by using a tamping material, closing the door on the side wall, moving or replacing the arch frame once after 3-4 rings of building are completed, and sequentially building the furnace.
At the interface of the small straight section 20 and the working chamber 12, the mullite silicon carbide brick III 11 in the built working layer needs to enter the working chamber 12 by the distance of 1-2 bricks, and the mullite silicon carbide brick III 11 in the working layer needs to be poured by a pouring material so as to be jointed and matched with the working chamber. The part of the small straight section 20, of the mullite silicon carbide brick III 11, which is in the working layer and extends into the working chamber 12, can prevent the flame from burning the refractory material on the side wall of the inlet of the working chamber 12 and prevent the refractory material on the side wall of the working chamber 12 from being damaged by melting. The brick body masonry of little straight section and big straight section does: the lower semicircle is built with a big head facing downwards and a small head facing upwards; the upper semicircle masonry is that the lower head faces downwards and the big head faces upwards.
The width of the arch is the width of the plate surface of the 2-3 ring brick, the arches of the large straight section 16 and the small straight section 20 are semicircular, and the diameters of the arches are matched with the inner diameters of the working layers of the sections of the furnace body; referring to fig. 16-18, the arch 22 of the cone-shaped segment is tapered to match the semi-circular working layer on the cone-shaped segment 19, and the outer diameter of the arch 22 of the cone-shaped segment matches the inner diameter of the working layer on the cone-shaped segment 19. The arch center is erected and fixed through the section steel supports 21, the section steel supports 21 are movably connected, and the arch center can move along with the construction process. The arch 22 of the cone is replaced according to the position of the cone 19.

Claims (5)

1. A suspension furnace combustion chamber masonry structure comprises a large straight section, a conical section, a small straight section, a tuyere and a fire observation hole, and is characterized in that a working layer mullite silicon carbide brick I and a heat insulation layer mullite light-gathering brick I are sequentially constructed in the large straight section from inside to outside; the tuyere and the fire observation hole are prefabricated pouring pieces, and are respectively built on the furnace wall of the large straight section through a working layer mullite silicon carbide brick I and a heat insulation layer mullite light-gathering brick I; the conical section is sequentially built with a working layer mullite silicon carbide brick II and a heat insulation layer mullite light-gathering brick II from inside to outside; the side surfaces of the working layer mullite silicon carbide brick II and the heat insulation layer mullite light brick II are parallelograms; and the small straight section is sequentially built with a working layer mullite silicon carbide brick III and a heat insulation layer mullite light-weight brick III from inside to outside.
2. The masonry structure for the suspension furnace combustion chamber according to claim 1, wherein the long sides of the parallelograms of the working layer mullite silicon carbide bricks II are smaller than the height of the working layer mullite silicon carbide bricks I, the long sides of the parallelograms of the heat insulation layer mullite light weight bricks II are smaller than the height of the heat insulation layer mullite light weight bricks I, the height of the working layer mullite silicon carbide bricks III is equal to the long sides of the parallelograms of the working layer mullite silicon carbide bricks II, and the height of the heat insulation layer mullite light weight bricks III is equal to the long sides of the parallelograms of the heat insulation layer mullite light weight bricks II.
3. The masonry structure for the combustion chamber of the suspension furnace as claimed in claim 1, wherein insulation boards are adhered between the insulation layer mullite lightweight brick I and the metal furnace shell, between the insulation layer mullite lightweight brick II and the metal furnace shell, and between the insulation layer mullite lightweight brick III and the metal furnace shell.
4. The masonry structure for the suspension furnace combustion chamber according to claim 1, wherein the working layer mullite silicon carbide brick I, the heat insulation layer mullite light weight brick I, the working layer mullite silicon carbide brick II, the heat insulation layer mullite light weight brick II, the working layer mullite silicon carbide brick III and the heat insulation layer mullite light weight brick III are wedge-shaped bricks with one large end and the other small end.
5. The suspension furnace firebox masonry structure according to claim 1 wherein fire viewing doors are hinged at the outer ends of said fire viewing apertures.
CN201920814724.8U 2019-05-31 2019-05-31 Suspension furnace combustion chamber masonry structure Withdrawn - After Issue CN210154326U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920814724.8U CN210154326U (en) 2019-05-31 2019-05-31 Suspension furnace combustion chamber masonry structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920814724.8U CN210154326U (en) 2019-05-31 2019-05-31 Suspension furnace combustion chamber masonry structure

Publications (1)

Publication Number Publication Date
CN210154326U true CN210154326U (en) 2020-03-17

Family

ID=69761355

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920814724.8U Withdrawn - After Issue CN210154326U (en) 2019-05-31 2019-05-31 Suspension furnace combustion chamber masonry structure

Country Status (1)

Country Link
CN (1) CN210154326U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110132015A (en) * 2019-05-31 2019-08-16 海城市东和泰迪冶金炉材有限公司 A kind of shower furnace combustion chamber masonry construction and its technique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110132015A (en) * 2019-05-31 2019-08-16 海城市东和泰迪冶金炉材有限公司 A kind of shower furnace combustion chamber masonry construction and its technique
CN110132015B (en) * 2019-05-31 2024-03-19 海城市东和泰迪冶金炉材有限公司 Suspension furnace combustion chamber masonry structure and process thereof

Similar Documents

Publication Publication Date Title
US6539602B1 (en) Method of repairing coke oven
CN100578127C (en) Fluidized calcining furnace ball arc furnace top and method of forming same
CN203866244U (en) Dry coke quenching furnace
CN210154326U (en) Suspension furnace combustion chamber masonry structure
CN110132015B (en) Suspension furnace combustion chamber masonry structure and process thereof
CN210154325U (en) Masonry structure of air inlet and conical section of suspension furnace combustion chamber
CN109652603B (en) Semi-pouring type blast furnace hot blast stove pipeline and construction method thereof
CN110863083A (en) Single-nozzle double-hole structure impregnation pipe and manufacturing method thereof
CN101906972B (en) Method for synchronously constructing second shaft wall lining and intermediate baffle of vertical shaft
CN107795976A (en) A kind of dry coke quenching residual heat boiler gas approach inside lining building structure and building method
CN109762579B (en) Dry quenching charge level indicator mount pad that prefabricated pouring piece was built by laying bricks or stones
CN110230926B (en) Masonry structure and process for air inlet and conical section of suspension furnace combustion chamber
CN201000274Y (en) High efficiency energy conservation tunnel kiln
CN210154328U (en) Precast block masonry structure for air inlet of combustion chamber of suspension furnace
CN104596288A (en) Communicating flame path of carbon anode baking furnace
CN108996927B (en) Double-chamber shaft kiln with cooling support upright post
CN111575026A (en) Novel heat insulation structure of coke oven foundation roof
CN209783294U (en) prefabricated block for reinforcing radiation heat transfer of steel rolling heating furnace
CN202734545U (en) Novel industrial kiln
CN110822910A (en) Fireproof prefabricated brick for dynamic high-temperature furnace and building method thereof
CN111895789A (en) Large horizontal high-temperature tubular shakeproof furnace lining and manufacturing method thereof
CN211177948U (en) Dynamic high-temperature furnace kiln is with fire-resistant prefabricated brick
CN210154327U (en) Suspension furnace combustion chamber air intake prefabricated section mold processing
CN202734544U (en) Novel kiln crown member of kiln
CN104792167B (en) Energy-saving type tunnel kiln

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant
AV01 Patent right actively abandoned
AV01 Patent right actively abandoned
AV01 Patent right actively abandoned

Granted publication date: 20200317

Effective date of abandoning: 20240319

AV01 Patent right actively abandoned

Granted publication date: 20200317

Effective date of abandoning: 20240319