CN111578712A - Furnace building and baking method for B30 copper-nickel alloy smelting furnace - Google Patents
Furnace building and baking method for B30 copper-nickel alloy smelting furnace Download PDFInfo
- Publication number
- CN111578712A CN111578712A CN202010460592.0A CN202010460592A CN111578712A CN 111578712 A CN111578712 A CN 111578712A CN 202010460592 A CN202010460592 A CN 202010460592A CN 111578712 A CN111578712 A CN 111578712A
- Authority
- CN
- China
- Prior art keywords
- furnace
- baking
- building
- smelting furnace
- smelting
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D1/1626—Making linings by compacting a refractory mass in the space defined by a backing mould or pattern and the furnace wall
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/0003—Linings or walls
- F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
- F27D1/0009—Comprising ceramic fibre elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D1/1621—Making linings by using shaped elements, e.g. bricks
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B2014/0843—Lining or casing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention provides a furnace building and baking method for a B30 copper-nickel alloy smelting furnace, which comprises the following steps: 1) cleaning a shell: grinding and polishing the interior of the smelting furnace shell; 2) laying a furnace bottom lining heat-insulating material; 3) building a furnace in layers; 4) placing a melting channel; 5) placing a water jacket; 6) laying furnace body heat insulation materials; 7) building an upper opening of a furnace edge; the baking oven comprises the following steps of a) natural curing: naturally placing for 18-24 hours after the furnace building is finished; b) charcoal baking: putting the ignited charcoal into a hearth for baking; c) power transmission baking: and opening the smelting furnace for baking. The furnace building and baking method for the B30 copper-nickel alloy smelting furnace is simple and convenient to operate, has strong universality, can solve the problem of short service life of the traditional B30 copper-nickel alloy smelting furnace, improves the furnace building environment and the safety of the smelting process, reduces the labor intensity of workers, and reduces the production cost.
Description
Technical Field
The invention relates to the technical field of nonferrous metal processing, in particular to a furnace building and baking method for a B30 copper-nickel alloy smelting furnace.
Background
The industrial frequency induction furnace is widely applied to the production of copper alloy bars by virtue of the characteristics of simple operation and maintenance, accurate control and adjustment of the temperature and components of the metal liquid, less element burning loss, less noise and pollution during smelting and the like. The smelting furnace has a long period in the process of building and baking the furnace, consumes a large amount of manpower, material resources and energy, has long service life and directly influences the key of production efficiency and production cost. The smelting temperature of the B30 copper-nickel alloy is up to above 1350 ℃, and the selection of furnace building materials, the furnace building method and the furnace baking method in the production directly influence the service life and the safety of the smelting furnace.
The furnace building and baking process of the cored induction electric furnace for smelting cupronickel under the application number of 201110197771.0 can prolong the service life of the furnace to 40 days, but directly build the furnace with an air pick without prepressing, and a ramming material is dispersed into the surrounding environment under the vibration of the air pick, thereby causing certain damage to the working environment and the health of workers.
Disclosure of Invention
The invention aims to overcome and supplement the defects in the prior art, and provides a B30 copper nickel alloy smelting furnace building and baking method, which improves the scattering of ramming mass into the working environment in the process of building the B30 copper nickel alloy smelting furnace, changes the working environment of workers, prolongs the service life of the smelting furnace, improves the production efficiency and reduces the production cost. The technical scheme adopted by the invention is as follows:
a B30 copper-nickel alloy smelting furnace building and baking method comprises the following steps: the method comprises a furnace building and a furnace baking, wherein the furnace building comprises the following steps:
1) cleaning a shell: grinding and polishing the interior of the smelting furnace shell;
2) laying a furnace bottom lining thermal insulation material: filling gaps at the welding positions of the steel plates of the smelting furnace shell with asbestos ropes, and paving a layer of heat-insulating plate with the thickness of 6-8 mm on the inner side of the furnace bottom of the smelting furnace shell;
3) layered furnace building: adding the ramming material into a shell of a smelting furnace, uniformly paving, and pre-pressing the ramming material once by a pre-pressing tool; tamping the ramming material through a first steel fork; secondary prepressing, namely vibrating the ramming material to be compact through a vibrating tool, and planing the surface to be loose through a second steel fork;
4) adding the ramming material again, and circulating step 3), placing a melting channel and fixing and supporting until the thickness of the ramming material in the melting furnace shell is 450-500 mm, and continuing to circulate step 3);
5) placing a water jacket: when the height of the ramming material in the smelting furnace shell, which is higher than the bottom of the water sleeve at the furnace bottom, is equal to the radius of the water sleeve, arranging the water jacket, and continuously circulating the step 3) until the furnace bottom is finished;
6) laying furnace body heat insulation materials: paving a plurality of ceramic fiber plates to the inner side of the furnace body, building refractory bricks on the inner sides of the ceramic fiber plates, fixing and supporting, adding a ramming material between the refractory bricks and the ceramic fiber plates, and continuing to circulate the step 3);
7) building an upper opening of a furnace edge: when the layered furnace building height is 10-20 mm away from the upper opening of the furnace edge, mixing the ramming material and the glass water, manually paving the mixture to the upper opening of the furnace edge, and covering a furnace cover;
the oven comprises the following steps:
a) and (4) natural maintenance: naturally placing for 18-24 hours after the furnace building is finished;
b) charcoal baking: putting the ignited charcoal into a hearth for baking;
c) power transmission baking: and opening the smelting furnace for baking.
Preferably, the method for building and baking the B30 cupronickel alloy smelting furnace comprises the following steps: soaking the asbestos ropes used in the step 2) with water glass in advance for 3-5 min, and sealing with a preservative film in the soaking process; the heat insulation plate is a high-temperature-resistant asbestos plate, and the thickness of the high-temperature-resistant asbestos plate is 6-8 mm; the high-temperature-resistant asbestos board is fixed to the inner side of the furnace bottom shell through a binder, and the binder comprises 90-92 parts by weight of fire clay and 8-10 parts by weight of water glass.
Preferably, the method for building and baking the B30 cupronickel alloy smelting furnace comprises the following steps: the ramming material obtained in the step 3), the step 4), the step 5), the step 6) and the step 7) is an aluminum-zirconium refractory ramming material, and the refractory temperature is 1790-1850 ℃.
Preferably, the method for building and baking the B30 cupronickel alloy smelting furnace comprises the following steps: the primary prepressing pressure in the step 3) is 0.2-0.3 MPa, and the secondary prepressing pressure is 0.4-0.5 MPa; the residence time of each prepressing is 10-15 s, the prepressing process is adhered to the inner wall of the smelting furnace shell, the prepressing is carried out from one end to the other end in sequence, then the prepressing is returned gradually, and the overlapping area of every two adjacent impressions is 30-40%.
Preferably, the method for building and baking the B30 cupronickel alloy smelting furnace comprises the following steps: and 3) tamping is carried out along one end of the inner wall of the smelting furnace shell according to an S-shaped track in the tamping sequence, the tamping force is balanced each time, the overlapping area of two adjacent tamping tracks is 30-40%, and the tamping is carried out for 2-3 times.
Preferably, the method for building and baking the B30 cupronickel alloy smelting furnace comprises the following steps: the compressed air pressure of the vibrating tool used in the step 3) is 0.6-1.0 MPa; the vibrating sequence is carried out along one end of the inner wall of the smelting furnace shell according to an S-shaped track, the force applied by each vibrating process needs to be balanced, and the overlapping area of the vibrating tracks of two adjacent vibrating processes is 30-40%; the vibration is carried out twice, the specification length multiplied by the width multiplied by the thickness of the vibration hammer head used for the first vibration is not less than (150-170 mm) × (130-150 mm) × (25-30 mm), and the specification length multiplied by the width multiplied by the thickness used for the second vibration is not less than (130-150 mm) × (100-130 mm) × (25-30 mm); the planing loose thickness is 10-15 mm;
preferably, the method for building and baking the B30 cupronickel alloy smelting furnace comprises the following steps: 2-3 layers of high-temperature resistant asbestos plates are arranged on the outer surface of the water jacket; the coaxiality deviation of the water jacket and the center of the channel of the molten channel is less than or equal to 3 degrees.
Preferably, the method for building and baking the B30 cupronickel alloy smelting furnace comprises the following steps: the thickness of the ceramic fiber board in the step 6) is 25-30 mm, the width of the ceramic fiber board is 100-110 mm, and the height of the cut burrs is less than or equal to 2 mm; the refractory bricks comprise a first refractory brick and a second refractory brick; the first refractory brick is arranged on a straight section of the furnace; the second refractory bricks are arranged at semicircular parts at two ends of the furnace, the second refractory bricks are in a side-thick wedge shape, and the thickness of a waist-shaped cavity formed by the ceramic fiber board and the refractory bricks in an enclosed mode is 250-300 mm.
Preferably, the method for building and baking the B30 cupronickel alloy smelting furnace comprises the following steps: and b) uniformly spreading the charcoal into the hearth, wherein the thickness of the charcoal is 200-300 mm.
Preferably, the method for building and baking the B30 cupronickel alloy smelting furnace comprises the following steps: the baking in the step c) is specifically as follows: the starting voltage is 110-120V, and the baking time is 22-26 h; adjusting the voltage to 150-160V, and baking for 20-24 h; adjusting the voltage to 160-180V, and baking for 18-24 h; increasing voltage of 10-15V every hour, focusing on the situation of a molten channel in the period, gradually adjusting the voltage to 230V, and adding a small amount of electrolytic copper after the molten channel is melted; after the electrolytic copper is completely melted, adjusting the voltage to 140-160V, and keeping the temperature for 45-50 h; increasing the voltage by 20V to 280V every hour, and gradually adding electrolytic copper according to the melting condition of the copper liquid; and carrying out smelting and casting according to the smelting voltage of 280V, and adjusting according to the smelting voltage increased by 10-15V every day after 56-72 h until the maximum smelting voltage is reached.
The invention has the advantages that:
(1) the furnace building and baking method for the B30 copper-nickel alloy smelting furnace is simple and convenient to operate, has strong universality, can solve the problem of short service life of the traditional B30 copper-nickel alloy smelting furnace, improves the furnace building environment and the safety of the smelting process, reduces the labor intensity of workers, and reduces the production cost.
(2) According to the method for building and drying the B30 copper-nickel alloy smelting furnace, the high-temperature refractory asbestos and the ceramic fiber board are additionally arranged on the inner wall of the smelting furnace shell, so that heat loss to the surrounding environment in the smelting process is effectively reduced, the heat preservation performance of the furnace body is improved, and the smelting operation environment is improved; by reasonably optimizing the sequence of layered furnace building, adding the thickness of ramming materials once, increasing the steps of prepressing twice, and optimizing the prepressing, ramming, vibrating modes and overlapping areas, the lining thermal insulation material of the smelting furnace is more compact, the thermal insulation performance and the bonding strength are improved, the service life of the smelting furnace is prolonged, and the pollution caused by the scattering of the ramming materials to the working environment in the furnace building process is reduced; before the corundum ramming material special for cupronickel is added again into the layered furnace, the upper surface layer is planed to be loose, so that each layer of ramming material is tightly combined, layering is avoided, and the interlayer binding force and compactness are improved; in the baking process, through the steps of natural air drying of charcoal and baking of the charcoal, the special ramming mass for corundum and the water in a furnace body are removed before sintering, so that the probability of cracking in the subsequent sintering process is reduced; by optimizing the baking furnace voltage, the compactness and the strength of the smelting furnace heat-insulating material are improved, the production efficiency is improved, and the production cost is reduced.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1:
a B30 copper-nickel alloy smelting furnace mainly comprises a furnace bottom and a furnace body, wherein the shell is a kidney-shaped shell formed by welding steel plates, a high-temperature resistant asbestos plate is paved on the inner wall of the furnace bottom, three holes are formed in the bottom of the furnace for installing a water sleeve, a melting channel is arranged in the furnace bottom, and the melting channel and the water sleeve are filled with a special corundum ramming material for white copper; the smelting furnace body is arranged above the furnace bottom, the ceramic fiber board is laid on the inner wall of the furnace body shell, the fire brick is laid on the innermost side, and the fire brick and the ceramic fiber board are filled with a corundum ramming material special for cupronickel.
Example 2:
a B30 copper-nickel alloy smelting furnace building and baking method comprises a building furnace and a baking furnace, wherein the building furnace comprises the following steps:
1) cleaning a shell: grinding the interior of a smelting furnace shell, particularly a welding seam by using a handheld electric shutter wheel, and polishing by using 320# abrasive paper; cleaning up sundries such as polished welding slag and the like;
2) laying a furnace bottom lining thermal insulation material: filling gaps at the welding joints of the steel plates of the shell of the smelting furnace with asbestos ropes, tamping and flattening; and paving a layer of high-temperature-resistant asbestos plate with the thickness of 6-8 mm at the inner side of the bottom shell body of the furnace. Soaking the used asbestos ropes in water glass in advance for 3-5 min, and sealing by using a preservative film in the soaking process; the binder for laying the high-temperature-resistant asbestos board is high-temperature-resistant mud, and the binder ratio is as follows: refractory mortar: water glass = (90-92): (8-10); the thickness of the high-temperature resistant asbestos plate is 6-8 mm;
3) layered furnace building: adding a certain amount of corundum ramming mass special for cupronickel into a shell of a smelting furnace, uniformly paving, wherein the paving thickness is 80-100 mm; carrying out surface primary prepressing on the special corundum ramming mass for the cupronickel with the paving thickness of 80-100 mm by hand according to the clockwise direction by using a self-made prepressing tool, wherein the prepressing pressure is 0.2-0.3 MPa; tamping the ramming material by using a first steel fork along the same direction; the first steel fork is a flat-head steel fork, and the tamping material is subjected to secondary prepressing in the same way, wherein the prepressing pressure is 0.4-0.5 MPa; vibrating and compacting the corundum ramming mass special for the cupronickel in sequence by using a handheld pneumatic ramming tool; and (3) planing the surface loose by using a second steel fork, wherein the planing thickness is 10-15 mm, and adding a certain amount of corundum ramming material special for cupronickel again to circulate the steps of layering and building the furnace as above. The corundum ramming mass special for cupronickel is an aluminum-zirconium refractory ramming mass, and the maximum refractory temperature can reach 1790-1850 ℃. The residence time of each prepressing is 10-15S, the prepressing process is adhered to the inner wall of the smelting furnace shell, the prepressing is carried out from one end to the other end in sequence, then the prepressing is returned gradually (namely carried out according to an S-shaped track), and the overlapping area of every two adjacent impressions is 30-40%. The flat head steel fork tamping is carried out after the first pre-pressing and before the second pre-pressing, tamping is carried out along one end of the inner wall of the smelting furnace shell according to an S-shaped track, the tamping force is balanced each time, the overlapping area of two adjacent tamping tracks is 30-40%, and the tamping is carried out for 2-3 times. The compressed air pressure of the vibrating tool is 0.6-1.0 MPa; the vibrating sequence is carried out along one end of the inner wall of the smelting furnace shell according to an S-shaped track, the force applied by each vibrating process needs to be balanced, and the overlapping area of the vibrating tracks of two adjacent vibrating processes is 30-40%; the vibration is carried out twice, the specification length multiplied by the width multiplied by the thickness of the vibration hammer head used for the first vibration is not less than (150-170 mm) × (130-150 mm) × (25-30 mm), and the specification length multiplied by the width multiplied by the thickness used for the second vibration is not less than (130-150 mm) × (100-130 mm) × (25-30 mm);
4) placing a melting channel: when the thickness of the ramming material in the smelting furnace shell is 450-500 mm, placing a smelting groove and fixing and supporting, and continuing to build the furnace in layers;
5) placing a water jacket: when the height of the corundum ramming material special for cupronickel in the smelting furnace shell is higher than the bottom of the water outlet sleeve and is approximately equal to the radius of the water outlet sleeve, the water jacket is arranged, and the furnace is built in layers continuously. 2-3 layers of high-temperature resistant asbestos plates are sequentially wound on the outer surface of the water jacket in the water jacket step; the coaxiality deviation of the water jacket and the center of the channel of the molten channel is less than or equal to 3 degrees;
6) laying furnace body heat insulation materials: paving a ceramic fiber board to the inner side of a furnace body, building refractory bricks in the furnace body and fixing a support, adding a ramming material between the refractory bricks and the ceramic fiber board, building the furnace in a layered manner, wherein the thickness of the ceramic fiber board for paving a furnace body heat insulation material is 25-30 mm, the ceramic fiber board is cut into strips with the width of 100-110 mm and the height of cut burrs is less than or equal to 2 mm; the size of the used refractory bricks in the straight section is length multiplied by width multiplied by thickness =230 multiplied by 115 multiplied by 65mm, the refractory bricks used in the semicircular parts at the two ends are side thick wedge-shaped refractory bricks, the size of the equal large end is 65mm, the size of the equal small end is 55mm, and the length is 230 mm; the thickness of a waist-shaped cavity surrounded by the ceramic fiberboard and the refractory bricks is 250-300 mm, and white copper corundum ramming materials are used for filling in layers;
7) building an upper opening of a furnace edge: when the layered furnace building height is 10-20 mm away from the upper opening of the furnace edge, mixing the ramming material and the glass water, manually paving the mixture to the upper opening of the furnace edge, and covering a furnace cover;
the oven comprises the following steps:
a) and (4) natural maintenance: naturally placing for 24 hours after the furnace building is finished;
b) charcoal baking: putting the ignited charcoal into a hearth for baking; keeping the thickness of the charcoal to be 200-300 mm in the baking process, uniformly spreading the charcoal in a hearth, and baking for 24 hours;
c) power transmission baking: and opening the smelting furnace for baking.
After the charcoal is roasted for 24 hours, the smelting furnace is started, and the charcoal roasting is continuously kept subsequently. The starting voltage is 110-120V, and the baking time is 22-26 h; adjusting the voltage to 150-160V, and baking for 20-24 h; adjusting the voltage to 160-180V, and baking for 18-24 h; increasing voltage of 10-15V every hour, focusing on the situation of a molten channel in the period, gradually adjusting the voltage to 230V, and adding a small amount of electrolytic copper after the molten channel is melted; after the electrolytic copper is completely melted, adjusting the voltage to 140-160V, and keeping the temperature for 45-50 h; increasing the voltage by 20V to 280V every hour, and gradually adding electrolytic copper according to the melting condition of the copper liquid; and carrying out smelting and casting according to the smelting voltage of 280V, and adjusting according to the smelting voltage increased by 10-15V every day after 56-72 h until the maximum smelting voltage is reached. According to the method for building and drying the B30 copper-nickel alloy smelting furnace, the service life of the smelting furnace is prolonged from the previous 30 days to 60-70 days through later verification; after the furnace baking is finished, the maximum power is used for smelting, and the smelting time is increased from the original 6 furnaces/day to 8 furnaces/day; the power consumption of the copper-nickel alloy ingot produced by comprehensively producing B30 is reduced by 200-300 kW.h/ton.
According to the method for building and drying the B30 copper-nickel alloy smelting furnace, the high-temperature refractory asbestos and the ceramic fiber board are additionally arranged on the inner wall of the smelting furnace shell, so that heat loss to the surrounding environment in the smelting process is effectively reduced, the heat preservation performance of the furnace body is improved, and the smelting operation environment is improved; by reasonably optimizing the sequence of layered furnace building, adding the thickness of ramming materials once, increasing the steps of prepressing twice, and optimizing the prepressing, ramming, vibrating modes and overlapping areas, the lining thermal insulation material of the smelting furnace is more compact, the thermal insulation performance and the bonding strength are improved, the service life of the smelting furnace is prolonged, and the pollution caused by the scattering of the ramming materials to the working environment in the furnace building process is reduced; before the corundum ramming material special for cupronickel is added again into the layered furnace, the upper surface layer is planed to be loose, so that each layer of ramming material is tightly combined, layering is avoided, and the interlayer binding force and compactness are improved; in the baking process, through the steps of natural air drying of charcoal and baking of the charcoal, the special ramming mass for corundum and the water in a furnace body are removed before sintering, so that the probability of cracking in the subsequent sintering process is reduced; by optimizing the baking furnace voltage, the compactness and the strength of the smelting furnace heat-insulating material are improved, the production efficiency is improved, and the production cost is reduced.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (10)
1. A B30 copper-nickel alloy smelting furnace building and baking method is characterized in that: the method comprises a furnace building and a furnace baking, wherein the furnace building comprises the following steps:
1) cleaning a shell: grinding and polishing the interior of the smelting furnace shell;
2) laying a furnace bottom lining thermal insulation material: filling gaps at the welding positions of steel plates of a smelting furnace shell with asbestos ropes, and paving a layer of heat insulation plate with the thickness of 6-8 mm on the inner side of the furnace bottom of the smelting furnace shell;
3) layered furnace building: adding the ramming material into a shell of a smelting furnace, uniformly paving, and pre-pressing the ramming material once by a pre-pressing tool; tamping the ramming material through a first steel fork; secondary prepressing, namely vibrating the ramming material to be compact through a vibrating tool, and planing the surface to be loose through a second steel fork;
4) placing a melting channel: adding the ramming material again, and circulating step 3), placing a melting channel and fixing and supporting until the thickness of the ramming material in the melting furnace shell is 450-500 mm, and continuing to circulate step 3);
5) placing a water jacket: when the height of the ramming material in the smelting furnace shell, which is higher than the bottom of the water sleeve at the furnace bottom, is equal to the radius of the water sleeve, arranging the water jacket, and continuously circulating the step 3) until the furnace bottom is finished;
6) laying furnace body heat insulation materials: paving a plurality of ceramic fiber plates to the inner side of the furnace body, building refractory bricks on the inner sides of the ceramic fiber plates, fixing and supporting, adding a ramming material between the refractory bricks and the ceramic fiber plates, and continuing to circulate the step 3);
7) building an upper opening of a furnace edge: when the layered furnace building height is 10-20 mm away from the upper opening of the furnace edge, mixing the ramming material and the glass water, manually paving the mixture to the upper opening of the furnace edge, and covering a furnace cover;
the oven comprises the following steps:
a) and (4) natural maintenance: naturally placing for 18-24 hours after the furnace building is finished;
b) charcoal baking: putting the ignited charcoal into a hearth for baking;
c) power transmission baking: and opening the smelting furnace for baking.
2. The method for building and baking a B30 cupronickel smelting furnace according to claim 1, characterized in that: soaking the asbestos ropes used in the step 2) with water glass in advance for 3-5 min, and sealing with a preservative film in the soaking process; the heat insulation plate is a high-temperature-resistant asbestos plate, and the thickness of the high-temperature-resistant asbestos plate is 6-8 mm; the high-temperature-resistant asbestos board is fixed to the inner side of the furnace bottom shell through a binder, and the binder comprises 90-92 parts by weight of fire clay and 8-10 parts by weight of water glass.
3. The method for building and baking a B30 cupronickel smelting furnace according to claim 1, characterized in that: the ramming material obtained in the step 3), the step 4), the step 5), the step 6) and the step 7) is an aluminum-zirconium refractory ramming material, and the refractory temperature is 1790-1850 ℃.
4. The method for building and baking a B30 cupronickel smelting furnace according to claim 1, characterized in that: the primary prepressing pressure in the step 3) is 0.2-0.3 MPa, and the secondary prepressing pressure is 0.4-0.5 MPa; the residence time of each prepressing is 10-15 s, the prepressing process is adhered to the inner wall of the smelting furnace shell, the prepressing is carried out from one end to the other end in sequence, then the prepressing is returned gradually, and the overlapping area of every two adjacent impressions is 30-40%.
5. The method for building and baking a B30 cupronickel smelting furnace according to claim 1, characterized in that: and 3) tamping is carried out along one end of the inner wall of the smelting furnace shell according to an S-shaped track in the tamping sequence, the tamping force is balanced each time, the overlapping area of two adjacent tamping tracks is 30-40%, and the tamping is carried out for 2-3 times.
6. The method for building and baking a B30 cupronickel smelting furnace according to claim 1, characterized in that: the compressed air pressure of the vibrating tool used in the step 3) is 0.6-1.0 MPa; the vibrating sequence is carried out along one end of the inner wall of the smelting furnace shell according to an S-shaped track, the force applied by each vibrating process needs to be balanced, and the overlapping area of the vibrating tracks of two adjacent vibrating processes is 30-40%; the vibration is carried out twice, the specification length multiplied by the width multiplied by the thickness of the vibration hammer head used for the first vibration is not less than (150-170 mm) × (130-150 mm) × (25-30 mm), and the specification length multiplied by the width multiplied by the thickness used for the second vibration is not less than (130-150 mm) × (100-130 mm) × (25-30 mm); the thickness of the plane is 10-15 mm.
7. The method for building and baking a B30 cupronickel smelting furnace according to claim 1, characterized in that: 2-3 layers of high-temperature resistant asbestos plates are arranged on the outer surface of the water jacket; the coaxiality deviation of the water jacket and the center of the channel of the molten channel is less than or equal to 3 degrees.
8. The method for building and baking a B30 cupronickel smelting furnace according to claim 1, characterized in that: the thickness of the ceramic fiber board in the step 6) is 25-30 mm, the width of the ceramic fiber board is 100-110 mm, and the height of the cut burrs is less than or equal to 2 mm; the refractory bricks comprise a first refractory brick and a second refractory brick; the first refractory brick is arranged on a straight section of the furnace; the second refractory bricks are arranged at semicircular parts at two ends of the furnace, the second refractory bricks are in a side-thick wedge shape, and the thickness of a waist-shaped cavity formed by the ceramic fiber board and the refractory bricks in an enclosed mode is 250-300 mm.
9. The method for building and baking a B30 cupronickel smelting furnace according to claim 1, characterized in that: and b) uniformly spreading the charcoal into the hearth, wherein the thickness of the charcoal is 200-300 mm.
10. The method for building and baking a B30 cupronickel smelting furnace according to claim 1, characterized in that: the baking in the step c) is specifically as follows: the starting voltage is 110-120V, and the baking time is 22-26 h; adjusting the voltage to 150-160V, and baking for 20-24 h; adjusting the voltage to 160-180V, and baking for 18-24 h; increasing voltage of 10-15V every hour, focusing on the situation of a molten channel in the period, gradually adjusting the voltage to 230V, and adding a small amount of electrolytic copper after the molten channel is melted; after the electrolytic copper is completely melted, adjusting the voltage to 140-160V, and keeping the temperature for 45-50 h; increasing the voltage by 20V to 280V every hour, and gradually adding electrolytic copper according to the melting condition of the copper liquid; and carrying out smelting and casting according to the smelting voltage of 280V, and adjusting according to the smelting voltage increased by 10-15V every day after 56-72 h until the maximum smelting voltage is reached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010460592.0A CN111578712B (en) | 2020-05-27 | 2020-05-27 | Furnace building and baking method for B30 copper-nickel alloy smelting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010460592.0A CN111578712B (en) | 2020-05-27 | 2020-05-27 | Furnace building and baking method for B30 copper-nickel alloy smelting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111578712A true CN111578712A (en) | 2020-08-25 |
| CN111578712B CN111578712B (en) | 2022-04-12 |
Family
ID=72119600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010460592.0A Active CN111578712B (en) | 2020-05-27 | 2020-05-27 | Furnace building and baking method for B30 copper-nickel alloy smelting furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111578712B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317461A (en) * | 2001-05-24 | 2001-10-17 | 卢成芸 | Mashed carbon paste and method for building furnace with it |
| CN102278887A (en) * | 2011-07-15 | 2011-12-14 | 桂林漓佳金属有限责任公司 | Processes for making and baking cored induction electric furnace for smelting copper-nickel |
| CN102560187A (en) * | 2012-03-10 | 2012-07-11 | 甘肃大鑫铜业有限责任公司 | Copper alloy for electrified railway contact network and preparation method thereof |
| CN103217018A (en) * | 2011-07-15 | 2013-07-24 | 桂林漓佳金属有限责任公司 | Furnace-building technology of cored electric induction furnace of cupronickel smelting |
| CN103411435A (en) * | 2013-07-24 | 2013-11-27 | 济南济钢铁合金厂 | Method for repairing furnace lining of intermediate frequency furnace used in steelmaking |
| CN110701911A (en) * | 2019-10-12 | 2020-01-17 | 高邮市吉能耐火材料厂 | Baking furnace building process |
-
2020
- 2020-05-27 CN CN202010460592.0A patent/CN111578712B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317461A (en) * | 2001-05-24 | 2001-10-17 | 卢成芸 | Mashed carbon paste and method for building furnace with it |
| CN102278887A (en) * | 2011-07-15 | 2011-12-14 | 桂林漓佳金属有限责任公司 | Processes for making and baking cored induction electric furnace for smelting copper-nickel |
| CN103217018A (en) * | 2011-07-15 | 2013-07-24 | 桂林漓佳金属有限责任公司 | Furnace-building technology of cored electric induction furnace of cupronickel smelting |
| CN102560187A (en) * | 2012-03-10 | 2012-07-11 | 甘肃大鑫铜业有限责任公司 | Copper alloy for electrified railway contact network and preparation method thereof |
| CN103411435A (en) * | 2013-07-24 | 2013-11-27 | 济南济钢铁合金厂 | Method for repairing furnace lining of intermediate frequency furnace used in steelmaking |
| CN110701911A (en) * | 2019-10-12 | 2020-01-17 | 高邮市吉能耐火材料厂 | Baking furnace building process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111578712B (en) | 2022-04-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6539602B1 (en) | Method of repairing coke oven | |
| CN101219898B (en) | Ceramic product baking and kiln-loading method | |
| CN1731061A (en) | Method for repairing furnace lining of intermediate frequency furnace for steelmaking | |
| JP6573837B2 (en) | Coke oven combustion chamber repair method | |
| CN103639376A (en) | Copper smelting insulation chute device | |
| CN112113430A (en) | Refractory material building method for smelting reduction furnace | |
| RU2010122057A (en) | REPAIR OF WALLS IN A FIRE-RESISTANT FURNACE | |
| CN111578712B (en) | Furnace building and baking method for B30 copper-nickel alloy smelting furnace | |
| JP2001019968A (en) | Repairing method for coke oven | |
| CN104501586B (en) | Furnace bottom structure capable of realizing reduction of deep bed for rotary hearth furnace | |
| CN207528059U (en) | A kind of heating furnace one-piece casting platform | |
| JP6844332B2 (en) | Construction method of the top of the chamber-type coke oven and the structure of the top of the chamber-type coke oven | |
| CN102297588A (en) | Composite insulating brick for kiln liner of rotary kiln and manufacturing method of brick | |
| CN115505662B (en) | Blast furnace hearth and manufacturing method and application thereof | |
| CN116136364A (en) | Quick repairing method for furnace bottom roller refractory material of roller bottom type heating furnace | |
| CN108458595A (en) | A kind of mineral hot furnace furnace lining brick fuel and brickwork joint encapsulation process method | |
| CN211564482U (en) | Steel ladle structure | |
| CN216049169U (en) | High-temperature-resistant anti-seismic ceramic tube sealing brick for ceramic heat exchanger | |
| CN102706156A (en) | Refractory material body of carbon roasting furnace | |
| CN209877633U (en) | But carborundum blast furnace carbon brick machine-shaping device of intelligence accuse temperature | |
| CN218646047U (en) | Bell furnace lining structure | |
| CN209926864U (en) | Furnace bottom heat preservation structure of calcium carbide furnace | |
| CN207936771U (en) | A kind of electric furnace refractory lining structure | |
| CN211977551U (en) | Novel spinel brick for cement rotary kiln | |
| CN115143783A (en) | Furnace building method and smelting furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 214105 No.18 Xiangyun Road, anzhen street, Xishan District, Wuxi City, Jiangsu Province Applicant after: Jiangsu Longda Super Alloy Co.,Ltd. Address before: 214105 No.18 Xiangyun Road, anzhen street, Xishan District, Wuxi City, Jiangsu Province Applicant before: WUXI LONGDA METAL MATERIALS Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |