CN110759722A - Manufacturing process of intermediate frequency furnace lining - Google Patents
Manufacturing process of intermediate frequency furnace lining Download PDFInfo
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- CN110759722A CN110759722A CN201911057460.7A CN201911057460A CN110759722A CN 110759722 A CN110759722 A CN 110759722A CN 201911057460 A CN201911057460 A CN 201911057460A CN 110759722 A CN110759722 A CN 110759722A
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- furnace
- furnace lining
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- intermediate frequency
- copper
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 36
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 63
- 229910052802 copper Inorganic materials 0.000 claims abstract description 63
- 239000010949 copper Substances 0.000 claims abstract description 63
- 239000000463 material Substances 0.000 claims abstract description 52
- 238000005245 sintering Methods 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 16
- PTVDYARBVCBHSL-UHFFFAOYSA-N copper;hydrate Chemical compound O.[Cu] PTVDYARBVCBHSL-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 239000000945 filler Substances 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 9
- 238000003723 Smelting Methods 0.000 claims description 8
- 238000005266 casting Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- 239000012774 insulation material Substances 0.000 claims description 6
- 238000004064 recycling Methods 0.000 claims description 4
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 3
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 3
- 239000006004 Quartz sand Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 3
- 239000004327 boric acid Substances 0.000 claims description 3
- 239000011449 brick Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000011029 spinel Substances 0.000 claims description 3
- 229910052596 spinel Inorganic materials 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 6
- 230000006698 induction Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/14—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silica
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- 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
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
- C04B2235/3222—Aluminates other than alumino-silicates, e.g. spinel (MgAl2O4)
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
- C04B2235/666—Applying a current during sintering, e.g. plasma sintering [SPS], electrical resistance heating or pulse electric current sintering [PECS]
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- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a manufacturing process of a furnace lining of an intermediate frequency furnace, which belongs to the technical field of sintering processes of furnace linings of electric furnaces, and sequentially comprises the steps of pouring and forming a furnace lining core by red copper water, placing the furnace lining core, manufacturing a furnace lining blank body, knotting furnace burden, adding copper material into the furnace lining core for primary and secondary sintering, guiding and collecting the molten copper material and the copper water formed by the furnace lining core, and knotting a furnace opening.
Description
Technical Field
The invention relates to the technical field of sintering processes of furnace linings of electric furnaces, in particular to a manufacturing process of a furnace lining of an intermediate frequency furnace.
Background
The medium-frequency electric furnace utilizes a medium-frequency power supply to establish a medium-frequency magnetic field, so that induced eddy current is generated in the ferromagnetic material and the ferromagnetic material generates heat, thereby achieving the purpose of heating the material. The intermediate frequency furnace mainly comprises a power supply, an induction coil and a sintering furnace lining built by refractory materials in the induction coil. The furnace lining is filled with metal furnace burden, when the induction coil is connected with an alternating current power supply, an alternating magnetic field is generated in the induction coil, induced electromotive force is generated in the furnace burden, as the furnace burden forms a closed loop, induced current is generated in the furnace burden, and the furnace burden is heated to be molten when the induced current passes through the furnace burden. The furnace lining sintering process of the intermediate frequency furnace plays a crucial role in the furnace life of the whole furnace period.
In order to better sinter the furnace lining of the intermediate frequency furnace, a steel furnace lining core is usually manufactured before furnace building, and after furnace charge is completely sintered, the steel furnace lining core is cooled and taken out, because the steel furnace lining core can generate a thermal expansion coefficient under a heated environment, the furnace lining core is difficult to take out, and if the steel furnace lining core is taken out improperly, a newly manufactured furnace lining can be damaged; the steel lining core can be taken out only after the lining is cooled, so that energy waste is caused, and the mould drying time is 45 hours, so that the lining manufacturing efficiency is low; the steel lining core can not be used for a long time due to repeated thermal deformation, so that secondary waste is often caused; and because the steel lining core is of an integral structure, the height of the steel lining core reaches about 1.7 meters, when the lining filler is rammed, a galvanized water pipe with the length of 1.8 meters and the diameter of 1 inch needs to be externally connected by an electric ramming machine, but because the integral lining core is too long, the lining filler cannot be rammed, the force of the electric ramming machine is too small, the water pipe is long and thin, elastic deformation is easy to generate, and the service life of the manufactured electric furnace lining is short.
Therefore, how to improve the sintering efficiency and the sintering quality of the intermediate frequency furnace lining, simplify the sintering process and reduce the sintering cost is the target to be achieved in the sintering process of the intermediate frequency furnace lining at present.
Disclosure of Invention
In order to solve the technical problems, the invention provides a manufacturing process of a furnace lining of an intermediate frequency furnace, which mainly solves the problems of low sintering efficiency and high sintering cost of the traditional intermediate frequency furnace lining, and further solves the problems of poor sintering quality and influence on the service life of the traditional intermediate frequency furnace lining.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: the manufacturing process of the intermediate frequency furnace lining sequentially comprises the following steps of:
a) manufacturing a furnace lining mold core: designing a casting mold according to the size of a furnace body of the intermediate frequency furnace, injecting copper water into the casting mold, opening the mold after the copper water is solidified, and taking out a copper furnace lining mold core;
b) placing a furnace lining core: placing the manufactured copper furnace lining mold core in the middle of the intermediate frequency furnace body, and positioning the mold core;
c) manufacturing a furnace lining blank: uniformly mixing 47.5-69 parts of quartz sand material, 30-50 parts of aluminum-magnesium spinel and 1-2.5 parts of boric acid to form a manufacturing base material of a furnace lining, molding 90-95 parts of the manufacturing base material and 5-10 parts of refractory mortar, and laying the molded base material in a furnace body of an intermediate frequency furnace to form a furnace lining blank;
d) and (3) furnace burden knotting: tamping the furnace bottom of the furnace lining blank body by using a tamping device, adding furnace lining filler into the furnace lining blank body and continuously knotting to form a semi-finished furnace lining;
e) primary sintering: adding a copper material into the furnace lining core, adding a heat insulation material at the position of a furnace opening of the intermediate frequency furnace, electrifying the intermediate frequency furnace, heating and sintering a furnace lining blank, and then, preserving heat for a period of time;
f) and (3) secondary sintering: removing heat insulation materials at the position of a furnace opening of the intermediate frequency furnace, heating and smelting copper materials in a furnace lining core to gradually melt the copper materials and the furnace lining core, and then preserving heat for a period of time;
g) and (3) copper water discharge: turning over the molten copper material and the molten copper formed by the furnace lining core along with the furnace, guiding the molten copper material and the molten copper into a storage bucket, and collecting and recycling the molten copper material and the molten copper;
h) knotting a furnace mouth: and placing an aluminum pressing plate above the furnace mouth of the semi-finished furnace lining to obtain the finished furnace lining.
Further, the lining core in the step a) is formed by pouring red copper, the copper material in the step e) is copper alloy, and the melting point of the copper material is lower than that of the lining core.
Furthermore, the furnace lining core is of a sectional structure and comprises a conical core body at the bottom and a multi-section cylindrical core body spliced at the upper end of the conical core body.
Further, the ramming device applied in the step d) is a pneumatic ramming machine, a solid steel chisel is installed on the pneumatic ramming machine, and the pneumatic ramming machine drives the solid steel chisel to ramme the furnace lining blank in sections.
Furthermore, the furnace brick is clamped between the furnace lining mold core and the intermediate frequency furnace body in the step b), so that the positioning of the furnace lining mold core is realized.
Further, the temperature of the primary sintering in the step e) is increased at the speed of 150-170 ℃/h for sintering for 4.5-5.5 hours, and then the temperature is maintained at 800-900 ℃ for 3.5-4.5 hours.
Further, the temperature of the secondary sintering in the step f) is increased at the speed of 190-210 ℃/h for 4.5-5.5 hours, and then the temperature is maintained at 1300-1400 ℃ for 1.5-2.5 hours.
Furthermore, an annular furnace platform is arranged outside the intermediate frequency furnace body, and a flow guide port for guiding out the copper water is arranged on the annular furnace platform.
The invention has the beneficial effects that:
1. according to the invention, the material of the original furnace lining core is changed from steel to copper, the temperature in the sintering process is correspondingly changed, the copper material in the furnace lining core is melted along with the furnace lining core in the sintering process and then is led out, collected and recycled, the damage of the furnace lining caused by taking out the furnace lining core for the second time is avoided, the production efficiency is improved, the production cost is reduced, the high-temperature airflow is prevented from directly impacting the intermediate frequency furnace lining blank, the copper material is directly added into the furnace lining core, the effect of protecting the intermediate frequency furnace is achieved, the smelting effect of the copper material is further ensured, and the service life of the furnace lining is prolonged.
2. Specifically, the furnace lining mold core sets up to the sectional type structure, including the conical core body of bottom and the cylindrical core body of multistage of the concatenation of conical core body upper end, use the ramming machine to carry out the in-process of ramming to the furnace lining filler, can place the conical core body of bottom in the furnace body earlier and fix a position after, use pneumatic ramming machine to drive solid drill rod to the stove bottom of furnace lining idiosome and stamp, after the ramming, place cylindrical core body on conical core body, continue to add the furnace lining filler to between furnace lining mold core and the furnace body, use pneumatic ramming machine to drive solid drill rod again and carry out the ramming, then according to the segmentation ramming in proper order of above-mentioned step, make the furnace lining idiosome fully tamp, further improved the life of furnace lining.
In conclusion, the invention leads out and collects the copper material in the furnace lining core after melting along with the furnace lining core for recycling, avoids the damage of the furnace lining caused by taking out the furnace lining core for the second time, improves the production efficiency, reduces the production cost, plays a role in protecting the furnace body of the intermediate frequency furnace, ensures the smelting effect of the copper material, ensures the sufficient tamping of the furnace lining filler and prolongs the service life of the furnace lining.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic structural diagram of an intermediate frequency furnace;
the labels in the above figures are: 1. the furnace lining comprises a furnace lining core, 11, a conical core body, 12, a cylindrical core body, 2, a furnace body, 3, a furnace lining blank, 4, an annular furnace platform and 5, a flow guide opening.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The specific implementation scheme of the invention is as follows: as shown in fig. 1, a manufacturing process of a furnace lining of an intermediate frequency furnace sequentially comprises the following steps:
a) manufacturing a furnace lining mold core 1: designing a casting mold according to the size of a furnace body of the intermediate frequency furnace, injecting copper water into the casting mold, opening the mold after the copper water is solidified, and taking out the copper furnace lining core 1; the furnace lining mold core 1 is of a sectional structure and is molded by casting in sections, and comprises a conical core body 11 at the bottom and a multi-section cylindrical core body 12 spliced at the upper end of the conical core body 11.
b) Placing a furnace lining core 1: the manufactured copper furnace lining core 1 is placed in the middle of the intermediate frequency furnace body 2, and a furnace brick is clamped between the furnace lining core 1 and the intermediate frequency furnace body 2 to position the furnace lining core.
c) Manufacturing a furnace lining blank 3: uniformly mixing 47.5-69 parts of quartz sand material, 30-50 parts of aluminum-magnesium spinel and 1-2.5 parts of boric acid to form a manufacturing base material of the furnace lining, molding 90-95 parts of the manufacturing base material and 5-10 parts of refractory mortar, and laying the molded base material in the furnace body of the intermediate frequency furnace to form a furnace lining blank.
d) And (3) furnace burden knotting: the method comprises the steps of using a pneumatic ramming machine to drive a solid steel chisel to ramme a furnace lining blank in a segmented manner, namely placing a conical core body 11 at the bottom in a furnace body 2, positioning well, using the pneumatic ramming machine to drive the solid steel chisel to ramme the furnace bottom of the furnace lining blank 3, placing a cylindrical core body 12 on the conical core body 11 after ramming, continuously adding furnace lining filler between a furnace lining core 1 and the furnace body 2, using the pneumatic ramming machine to drive the solid steel chisel to ramme, and then sequentially ramming in a segmented manner according to the steps to fully tamp the furnace lining blank 3 to form a semi-finished furnace lining, so that the service life of the furnace lining is prolonged.
e) Primary sintering: adding a copper material into the furnace lining core 1, adding a heat insulation material at the position of a furnace opening of the intermediate frequency furnace, electrifying the intermediate frequency furnace, heating and sintering the furnace lining blank 3 at the speed of 150-170 ℃/h, wherein the sintering time is 4.5-5.5 hours, and then, preserving heat at the temperature of 800-900 ℃ for 3.5-4.5 hours.
f) And (3) secondary sintering: removing heat insulation materials at the position of a furnace opening of the intermediate frequency furnace, heating and sintering copper materials in the furnace lining core 1 at the speed of 190-210 ℃/h, wherein the sintering time is 4.5-5.5 hours, the furnace lining core 1 is formed by pouring red copper water, the melting point of the furnace lining core 1 formed by the red copper materials is close to that of pure copper, most of the copper materials in the furnace lining core 1 are copper waste materials which are made of copper alloy, the melting point of the copper materials is lower than that of the furnace lining core 1, the copper materials are firstly melted in the furnace lining core 1 in the smelting process, the smelting effect of the copper materials is ensured, after the melting point of the red copper materials is reached, the furnace lining core 1 is gradually melted, and then heat insulation is carried out at the temperature of 1300-1400 ℃ for 1.5-2.5 hours, so that the furnace lining core 1 is completely melted.
The step e) and the step f) avoid that high-temperature airflow directly impacts the intermediate frequency furnace lining blank 3, and the copper material is directly added into the lining core 1, so that the intermediate frequency furnace is protected, the smelting effect of the copper material is further ensured, and the service life of the lining is prolonged.
g) And (3) copper water discharge: the molten copper formed by the melted copper and the lining core 1 is turned over along with the furnace, an annular furnace platform 4 is arranged outside the furnace body of the intermediate frequency furnace, a flow guide port 5 for guiding out the copper is arranged on the annular furnace platform 4, and the flow guide port 5 is made of the material of the lining blank 3, so that the copper is guided into the storage barrel through the flow guide port 5 and collected for reuse.
h) Knotting a furnace mouth: and placing an aluminum pressing plate above the furnace mouth of the semi-finished furnace lining to obtain the finished furnace lining.
Through using the furnace lining core of red copper material to replace original steel furnace lining core, the enterprise carries out comparative analysis to building the stove cost, as follows:
the furnace building cost of the steel lining core is as follows: the steel lining core outsourcing cost is 7500 Yuan 1 set, the waste steel can be recovered 400 Yuan, and the cost is 7500 Yuan 400 7100 Yuan; assume that 3 times can be used, with a cost 7100/3 of 2700 dollars each; the mold drying time is 45 hours, the power consumption is 4500 degrees x 0.8 yuan/degree which is 3600 yuan, and the total furnace building cost is 2700+3600 yuan/time which is 6300 yuan.
The furnace building cost of the red copper lining core is as follows: the red copper lining core is self-made by enterprises, the material can be recycled for manufacturing products, only the processing cost is considered, the labor cost and the like belong to fixed cost, only the electric energy consumption and the copper loss are considered, the weight of the lining core is 1.177 tons, the kinetic energy cost per ton is 2067 yuan per ton, the furnace building cost per time is 1.177 × 2067+1.177 × 1% × 50000 × 3021.4 yuan, and 1.177 × 1% 50000 is the copper loss of electrolytic copper.
Through analysis, the cost can be saved by using a red copper lining core to build the furnace each time, wherein the cost is 6300-3021.4 to 3278.6 yuan.
In conclusion, the invention leads out and collects the copper material in the furnace lining core after melting along with the furnace lining core for recycling, avoids the damage of the furnace lining caused by taking out the furnace lining core for the second time, improves the production efficiency, reduces the production cost, plays a role in protecting the furnace body of the intermediate frequency furnace, ensures the smelting effect of the copper material, ensures the sufficient tamping of the furnace lining filler and prolongs the service life of the furnace lining.
While the foregoing is directed to the principles of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (8)
1. A manufacturing process of a furnace lining of an intermediate frequency furnace is characterized by sequentially comprising the following steps of:
a) manufacturing a furnace lining mold core: designing a casting mold according to the size of a furnace body of the intermediate frequency furnace, injecting copper water into the casting mold, opening the mold after the copper water is solidified, and taking out a copper furnace lining mold core;
b) placing a furnace lining core: placing the manufactured copper furnace lining mold core in the middle of the intermediate frequency furnace body, and positioning the mold core;
c) manufacturing a furnace lining blank: uniformly mixing 47.5-69 parts of quartz sand material, 30-50 parts of aluminum-magnesium spinel and 1-2.5 parts of boric acid to form a manufacturing base material of a furnace lining, molding 90-95 parts of the manufacturing base material and 5-10 parts of refractory mortar, and laying the molded base material in a furnace body of an intermediate frequency furnace to form a furnace lining blank;
d) and (3) furnace burden knotting: tamping the furnace bottom of the furnace lining blank body by using a tamping device, adding furnace lining filler into the furnace lining blank body and continuously knotting to form a semi-finished furnace lining;
e) primary sintering: adding a copper material into the furnace lining core, adding a heat insulation material at the position of a furnace opening of the intermediate frequency furnace, electrifying the intermediate frequency furnace, heating and sintering a furnace lining blank, and then, preserving heat for a period of time;
f) and (3) secondary sintering: removing heat insulation materials at the position of a furnace opening of the intermediate frequency furnace, heating and smelting copper materials in a furnace lining core to gradually melt the copper materials and the furnace lining core, and then preserving heat for a period of time;
g) and (3) copper water discharge: turning over the molten copper material and the molten copper formed by the furnace lining core along with the furnace, guiding the molten copper material and the molten copper into a storage bucket, and collecting and recycling the molten copper material and the molten copper;
h) knotting a furnace mouth: and placing an aluminum pressing plate above the furnace mouth of the semi-finished furnace lining to obtain the finished furnace lining.
2. The process for manufacturing the intermediate frequency furnace lining according to claim 1, wherein: the furnace lining core in the step a) is formed by pouring red copper, the copper material in the step e) is made of copper alloy, and the melting point of the copper material is lower than that of the furnace lining core.
3. The process for manufacturing the intermediate frequency furnace lining according to claim 2, wherein: the furnace lining core is of a sectional structure and comprises a conical core body at the bottom and a multi-section cylindrical core body spliced at the upper end of the conical core body.
4. The process for manufacturing the intermediate frequency furnace lining according to claim 3, wherein: and d), the tamping device applied in the step d) is a pneumatic tamping machine, a solid steel chisel is installed on the pneumatic tamping machine, and the pneumatic tamping machine drives the solid steel chisel to stamp the furnace lining blank in sections.
5. The manufacturing process of the intermediate frequency furnace lining according to any one of claims 1 to 4, characterized in that: and b), furnace bricks are clamped between the furnace lining core and the intermediate frequency furnace body in the step b), so that the furnace lining core is positioned.
6. The process for manufacturing the intermediate frequency furnace lining according to claim 5, wherein: the temperature of the primary sintering in the step e) is increased at the speed of 150-170 ℃/h for sintering for 4.5-5.5 hours, and then the temperature is maintained at 800-900 ℃ for 3.5-4.5 hours.
7. The process for manufacturing the intermediate frequency furnace lining according to claim 5, wherein: the temperature of the secondary sintering in the step f) is increased at the speed of 190-210 ℃/h, the sintering time is 4.5-5.5 hours, and then the temperature is kept at 1300-1400 ℃ for 1.5-2.5 hours.
8. The process for manufacturing the intermediate frequency furnace lining according to claim 5, wherein: an annular furnace platform is arranged outside the intermediate frequency furnace body, and a flow guide port for guiding out the copper water is arranged on the annular furnace platform.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112125682A (en) * | 2020-08-21 | 2020-12-25 | 宁波长振铜业有限公司 | Furnace striking material for melting channel of regenerative brass power frequency induction furnace and use method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701750A (en) * | 2012-05-28 | 2012-10-03 | 长兴东成耐火材料有限公司 | Process for sintering furnace lining of intermediate frequency high-temperature electric furnace |
| CN102706162A (en) * | 2012-05-31 | 2012-10-03 | 杭州中强轧辊有限公司 | Wet process for building 3t intermediate frequency electric furnace |
| CN103363807A (en) * | 2013-08-09 | 2013-10-23 | 河北冀凯铸业有限公司 | Method for forging, braking and sintering crucible in medium-frequency induction furnace |
| CN104075567A (en) * | 2013-03-28 | 2014-10-01 | 新兴重工湖北三六一一机械有限公司 | Casting knotting furnace pipe device capable of being operated conveniently and quickly and assembled and disassembled quickly |
| CN107388832A (en) * | 2017-08-09 | 2017-11-24 | 詹秀云 | A kind of novel furnace lining punching block of intermediate frequency furnace |
-
2019
- 2019-10-29 CN CN201911057460.7A patent/CN110759722A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701750A (en) * | 2012-05-28 | 2012-10-03 | 长兴东成耐火材料有限公司 | Process for sintering furnace lining of intermediate frequency high-temperature electric furnace |
| CN102706162A (en) * | 2012-05-31 | 2012-10-03 | 杭州中强轧辊有限公司 | Wet process for building 3t intermediate frequency electric furnace |
| CN104075567A (en) * | 2013-03-28 | 2014-10-01 | 新兴重工湖北三六一一机械有限公司 | Casting knotting furnace pipe device capable of being operated conveniently and quickly and assembled and disassembled quickly |
| CN103363807A (en) * | 2013-08-09 | 2013-10-23 | 河北冀凯铸业有限公司 | Method for forging, braking and sintering crucible in medium-frequency induction furnace |
| CN107388832A (en) * | 2017-08-09 | 2017-11-24 | 詹秀云 | A kind of novel furnace lining punching block of intermediate frequency furnace |
Non-Patent Citations (1)
| Title |
|---|
| 钟卫佳: "《铜加工技术实用手册》", 31 January 2007, 冶金工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112125682A (en) * | 2020-08-21 | 2020-12-25 | 宁波长振铜业有限公司 | Furnace striking material for melting channel of regenerative brass power frequency induction furnace and use method |
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