CN220472235U - Metal thermal reduction vacuum smelting equipment - Google Patents
Metal thermal reduction vacuum smelting equipment Download PDFInfo
- Publication number
- CN220472235U CN220472235U CN202321812062.3U CN202321812062U CN220472235U CN 220472235 U CN220472235 U CN 220472235U CN 202321812062 U CN202321812062 U CN 202321812062U CN 220472235 U CN220472235 U CN 220472235U
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- Prior art keywords
- vacuum
- vacuum furnace
- feed bin
- smelting
- furnace
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- 238000003723 Smelting Methods 0.000 title claims abstract description 53
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 20
- 239000002184 metal Substances 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000004321 preservation Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 230000001681 protective effect Effects 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 12
- 238000006722 reduction reaction Methods 0.000 abstract description 12
- 239000000428 dust Substances 0.000 abstract description 8
- 239000002893 slag Substances 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 5
- 241000406668 Loxodonta cyclotis Species 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 6
- 229910052804 chromium Inorganic materials 0.000 description 6
- 239000011651 chromium Substances 0.000 description 6
- 229910045601 alloy Inorganic materials 0.000 description 5
- 239000000956 alloy Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 5
- 229910001141 Ductile iron Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001784 detoxification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model provides a metallothermic reduction vacuum smelting equipment, includes base and vacuum furnace casing, is provided with the furnace gate in the one end of vacuum furnace casing one side of vacuum furnace casing is provided with the vacuum pump the inner wall of vacuum furnace casing is provided with the heat preservation, the bottom is provided with the material platform in the vacuum furnace casing, is provided with the smelting furnace on the material platform, is connected with the igniter on vacuum furnace casing inner wall in the vacuum furnace casing top is provided with the feed bin, is provided with screw feeder in the discharge gate department of feed bin, and screw feeder is linked together with the vacuum furnace casing through the unloading elephant trunk's discharge gate department installs the material loading and pinch, the vacuum pump with the feed bin is linked together through the pipeline, and is provided with first valve on the pipeline that is close to the feed bin between vacuum pump and feed bin. The advantages are that: the vacuum smelting equipment is suitable for metal thermal reduction reaction, can avoid dust flying and high-temperature slag liquid splashing in the furnace burden smelting process, and is suitable for step-by-step charging vacuum smelting by an aluminothermic method.
Description
Technical Field
The utility model belongs to the field of metal chromium smelting, relates to metal thermal reduction vacuum smelting equipment, and in particular relates to vacuum smelting equipment for producing metal chromium by metal thermal reduction.
Background
The metal chromium occupies an important role in the alloy field, has corrosion resistance, excellent hardness and toughness, and is widely used in the alloy manufacturing fields of smelting high-temperature alloys, resistance alloys, precision alloys and the like. The metallothermic reduction method is a main method for producing metallic chromium at present, and the method is characterized in that the mixture is placed in a smelting furnace and smelted in air by self-heating without an additional heat source, so that the production cost is relatively low. However, in the smelting process, dust in the air at the upper part of the smelting furnace flies upwards and high-temperature slag liquid splashes, the production working condition is severe, the generated flue gas needs to be subjected to bag dust removal, and dust collection materials and slag also need to be subjected to detoxification treatment.
The research shows that the metallothermic reduction aluminum heating method adopts a vacuum mode to smelt, and can solve the problem that dust flies upward and high-temperature slag liquid splashes in the air at the upper part of a smelting furnace. However, the traditional vacuum furnace is generally used for charging the furnace body, then sealing the furnace body, vacuumizing, heating by a burner, and uniformly heating the furnace body, but the equipment is not suitable for producing the metal chromium by the step charging by the aluminothermic method with self-heating metal reaction and without additional heat energy, and the heat emitted by the aluminothermic method is intensively emitted from the furnace mouth of the smelting furnace, so that the top of the vacuum furnace body is easily and intensively baked, and the service life of the vacuum furnace body is seriously influenced; therefore, there is a need to develop a vacuum smelting apparatus suitable for producing metallic chromium by a metallothermic reduction process.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide the metallothermic reduction vacuum smelting equipment which is suitable for metallothermic reduction reaction, can avoid dust flying and high-temperature slag liquid splashing in the furnace burden smelting process, and is suitable for step-by-step charging vacuum smelting by an aluminothermic method.
The utility model is realized in the following way:
the utility model provides a metallothermic reduction vacuum smelting equipment, includes base and the vacuum furnace casing of horizontal installation on the base, is provided with the furnace gate in the one end of vacuum furnace casing one side of vacuum furnace casing is provided with the vacuum pump, and vacuum furnace casing is linked together with the vacuum pump the inner wall of vacuum furnace casing is provided with the heat preservation, its special character lies in: the vacuum furnace is characterized in that a material table is arranged at the inner bottom of the vacuum furnace shell, a smelting furnace is arranged on the material table, an igniter is flexibly connected to the inner wall of the vacuum furnace shell, a feed bin is arranged above the vacuum furnace shell, a screw feeder is arranged at the discharge port of the feed bin and is communicated with the vacuum furnace shell through a blanking chute, a feeding dustpan is arranged at the discharge port of the blanking chute, a vacuum pump is communicated with the feed bin through a pipeline, and a first valve is arranged on the pipeline between the vacuum pump and the feed bin and close to the feed bin.
Further, a second valve is arranged on the discharge hole of the storage bin, and a third valve is arranged on the discharge hole of the screw feeder.
Further, a protective cover is arranged above the smelting furnace and close to the inner wall of the vacuum furnace shell, and the blanking chute downwards passes through the protective cover.
Further, a water cooling jacket is arranged in the vacuum furnace shell, a water inlet of the water cooling jacket is arranged at the middle lower part of the outer wall of the vacuum furnace shell, and a water outlet of the water cooling jacket is arranged at the upper part of the outer wall of the vacuum furnace shell.
Further, the heat preservation is from outside to inside in proper order metal felt insulating layer, knot material heat preservation, and the inboard of heat preservation is provided with the metal furnace lining.
Furthermore, the furnace wall of the smelting furnace is provided with a spheroidal graphite cast iron layer and a magnesia brick layer arranged on the inner side of the spheroidal graphite cast iron layer, so that the breakdown of a metal solution in a molten pool into the smelting furnace during smelting reaction is avoided.
Furthermore, the furnace door is provided with an observation window which is round and has a diameter larger than 60mm and is used for observing the condition in the smelting furnace.
Further, a protective gas inlet hole is formed in the vacuum furnace shell in the circumferential direction perpendicular to the vacuum furnace shell, and the protective gas inlet hole is communicated with a protective gas source through a pipeline.
The utility model has the beneficial effects that:
the vacuum furnace is characterized in that a feed bin is arranged above a vacuum furnace shell, feeding is performed through a screw feeder, and valves are respectively arranged at a feed bin outlet and a screw feeder outlet, so that the feed bin and the vacuum furnace shell can be freely communicated or disconnected, secondary feeding can be realized while the vacuum environment is not influenced, smelting is performed under the vacuum condition, and meanwhile, step feeding can be realized, and the reaction can be performed stably; the heat-insulating layer is arranged on the inner wall of the vacuum furnace shell, and the protective cover is arranged above the smelting furnace, so that the service life of the equipment can be prolonged; the vacuum smelting equipment is suitable for metal thermal reduction reaction, can avoid dust flying and high-temperature slag liquid splashing in the furnace burden smelting process, and is suitable for step-by-step charging vacuum smelting by an aluminothermic method.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a cross-sectional view of FIG. 1;
fig. 3 is an enlarged view of a portion a of fig. 2.
In the figure: 1-a base; 2-a vacuum furnace shell; 3-a water-cooling jacket; 301-a water inlet; 302-a water outlet; 4-furnace door; 5-an insulating layer; 501-a metal felt insulation layer; 502-a knotting material heat-insulating layer; 6-metal furnace lining; 7-a viewing window; 8-material stage; 9-smelting furnace; 10-a storage bin; 11-screw feeder; 12-blanking a chute; 13-feeding the dust pan; 14-a protective cover, 15-a vacuum pump; 16-a first valve; 17-a second valve; 18-a third valve; 19-an igniter; 20-shielding gas is introduced into the holes.
Detailed Description
As shown in fig. 1 to 3, the metallothermic reduction vacuum smelting equipment comprises a base 1 and a vacuum furnace shell 2 horizontally arranged on the base 1, wherein a water cooling jacket 3 is arranged in the vacuum furnace shell 2, a water inlet 301 of the water cooling jacket 3 is arranged at the middle lower part of the outer wall of the vacuum furnace shell 2, and a water outlet 302 of the water cooling jacket 3 is arranged at the upper part of the outer wall of the vacuum furnace shell 2; a protective gas inlet hole 20 is formed in the vacuum furnace shell 2 in the circumferential direction perpendicular to the vacuum furnace shell, and the protective gas inlet hole 20 is communicated with a protective gas source through a pipeline; an oven door 4 is arranged at one end of the vacuum oven shell 2, an observation window 7 is arranged on the oven door 4, the observation window 7 is round, and the diameter is more than 60mm and is used for observing the condition in the smelting furnace 9, and the embodiment takes the round with the diameter of 30cm as an example; the inner wall of the vacuum furnace shell 2 is provided with a heat preservation layer 5, the heat preservation layer 5 is sequentially provided with a metal felt heat insulation layer 501 and a knotting material heat preservation layer 502 from outside to inside, and the inner side of the heat preservation layer 5 is provided with a metal furnace lining 6;
an igniter 19 is flexibly connected to the inner wall of the vacuum furnace shell 2, a material table 8 is arranged at the inner bottom of the vacuum furnace shell 2, a smelting furnace 9 is arranged on the material table 8, the furnace wall of the smelting furnace 9 is provided with a nodular cast iron layer and a magnesium brick layer with the thickness of 65mm, which is arranged at the inner side of the nodular cast iron layer, and a protective cover 14 is arranged right above the smelting furnace 9 and close to the inner wall of the vacuum furnace shell 2; a feed bin 10 is arranged above the vacuum furnace shell 2, a screw feeder 11 is arranged at a discharge hole at the bottom end of the feed bin 10, the screw feeder 11 is communicated with the vacuum furnace shell 2 through a blanking chute 12, the blanking chute 12 downwards passes through the protective cover 14, and a feeding dustpan 13 is arranged at the outlet of the blanking chute 12; a second valve 17 is arranged on a discharge hole of the stock bin 10, and the second valve 17 adopts a vacuum valve in the embodiment; a third valve 18 is arranged on the discharge hole of the screw feeder 11;
a vacuum pump 15 is arranged on one side of the vacuum furnace shell 2, the vacuum pump 15 is respectively communicated with the vacuum furnace shell 2 and the storage bin 10 through a three-way pipe, and a first valve 16 is arranged on a pipeline between the vacuum pump 15 and the storage bin 10 and close to the storage bin 10.
Placing the smelting furnace 9 on a material table 8, placing a part of mixed materials into a feed bin 10, opening a second valve 17 and a third valve 18, starting a screw feeder 11, entering a feeding hopper 13 through a blanking chute 12 to discharge the mixed materials into the smelting furnace 9 as a bottom material, closing the second valve 17 and the third valve 18 when the volume of the bottom material is 1/2 of the smelting furnace 9, closing the screw feeder 11, supplementing the rest mixed materials into the feed bin 10, closing the feed bin 10 and a vacuum furnace shell 2, injecting circulating water into a water cooling jacket 3 through a water inlet 301, discharging the circulating water through an outlet 302, water-cooling the vacuum furnace shell 2, opening a first valve 16, starting a vacuum pump 15, vacuumizing the vacuum furnace shell 2 and the feed bin 10, starting an igniter 19 for ignition reaction after the vacuum degree reaches 101kpa, observing the reaction condition of the bottom material through an observation window 7, opening the second valve 17 and the third valve 18, opening the screw feeder 11 for continuous discharging after the materials in the feed bin 10 are filled into the feed bin 10, sequentially closing the screw feeder 11, the first valve 16, the third valve 17 and the third valve 18, and the vacuum furnace shell 2, and opening the vacuum pump 15 for vacuum protection after the vacuum pump is opened for 30min, and the vacuum pump is opened for vacuum protection by the vacuum protection pump 15, and the vacuum protection pump is opened for 20 min after the vacuum protection is cooled; when the temperature in the vacuum smelting equipment is reduced to below 600 ℃, pushing the smelting furnace 9 into a cooling bin from the vacuum furnace shell 2, continuing cooling treatment, and completing tapping. The equipment runs continuously for three months, and the heat preservation layer 5 in the vacuum furnace shell 2 is observed to be intact and free from deformation, and the protective cover 14 right above the smelting furnace 9 is observed to be intact and free from burning loss.
Claims (7)
1. The utility model provides a metallothermic reduction vacuum smelting equipment, includes base and the vacuum furnace casing of horizontal installation on the base, is provided with the furnace gate in the one end of vacuum furnace casing one side of vacuum furnace casing is provided with the vacuum pump, and vacuum furnace casing is linked together with the vacuum pump the inner wall of vacuum furnace casing is provided with heat preservation, characterized by: the vacuum furnace is characterized in that a material table is arranged at the inner bottom of the vacuum furnace shell, a smelting furnace is arranged on the material table, an igniter is flexibly connected to the inner wall of the vacuum furnace shell, a feed bin is arranged above the vacuum furnace shell, a screw feeder is arranged at the discharge port of the feed bin and is communicated with the vacuum furnace shell through a blanking chute, a feeding dustpan is arranged at the discharge port of the blanking chute, a vacuum pump is communicated with the feed bin through a pipeline, and a first valve is arranged on the pipeline between the vacuum pump and the feed bin and close to the feed bin.
2. The metallothermic reduction vacuum smelting apparatus according to claim 1, wherein: the discharge port of the feed bin is provided with a second valve, and the discharge port of the screw feeder is provided with a third valve.
3. The metallothermic reduction vacuum smelting apparatus according to claim 1, wherein: a protective cover is arranged above the smelting furnace and close to the inner wall of the vacuum furnace shell, and the blanking chute downwards passes through the protective cover.
4. The metallothermic reduction vacuum smelting apparatus according to claim 1, wherein: a water cooling jacket is arranged in the vacuum furnace shell, a water inlet of the water cooling jacket is arranged at the middle lower part of the outer wall of the vacuum furnace shell, and a water outlet of the water cooling jacket is arranged at the upper part of the outer wall of the vacuum furnace shell.
5. The metallothermic reduction vacuum smelting apparatus according to claim 1, wherein: the heat-insulating layer is sequentially provided with a metal felt heat-insulating layer and a knotting material heat-insulating layer from outside to inside, and a metal furnace lining is arranged on the inner side of the heat-insulating layer.
6. The metallothermic reduction vacuum smelting apparatus according to claim 1, wherein: the circumference of the vacuum furnace shell is perpendicular to the vacuum furnace shell and is provided with a protective gas inlet hole, and the protective gas inlet hole is communicated with a protective gas source through a pipeline.
7. The metallothermic reduction vacuum smelting apparatus according to claim 1, wherein: the furnace door is provided with an observation window which is round and has a diameter larger than 60mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321812062.3U CN220472235U (en) | 2023-07-11 | 2023-07-11 | Metal thermal reduction vacuum smelting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321812062.3U CN220472235U (en) | 2023-07-11 | 2023-07-11 | Metal thermal reduction vacuum smelting equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220472235U true CN220472235U (en) | 2024-02-09 |
Family
ID=89776564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321812062.3U Active CN220472235U (en) | 2023-07-11 | 2023-07-11 | Metal thermal reduction vacuum smelting equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220472235U (en) |
-
2023
- 2023-07-11 CN CN202321812062.3U patent/CN220472235U/en active Active
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