CN217715937U - Sub-vacuum electric smelting magnesium oxide smelting and carbon dioxide capturing and recycling system - Google Patents
Sub-vacuum electric smelting magnesium oxide smelting and carbon dioxide capturing and recycling system Download PDFInfo
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- CN217715937U CN217715937U CN202121671097.0U CN202121671097U CN217715937U CN 217715937 U CN217715937 U CN 217715937U CN 202121671097 U CN202121671097 U CN 202121671097U CN 217715937 U CN217715937 U CN 217715937U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2
Abstract
The utility model relates to a sub-vacuum electric smelting magnesium oxide is smelted and carbon dioxide catches recovery system, including smelting removal dolly, furnace body, smelting a stove section of thick bamboo, feeding device, electrode elevating system, sack cleaner, transformer and automatic control system, its characterized in that: still include the carbon dioxide recovery system who is connected with the sack cleaner, the furnace body be the sub-vacuum furnace body, carbon dioxide recovery system include flue gas recovery pipe, vacuum pump, exhaust gas blast pipe and carbon dioxide recovery pipe. Adopt the utility model discloses carbon dioxide catches recovery system is that magnesium ore concentrate powder smelts under the sub-vacuum condition, and the carbon dioxide gas in the magnesium oxide liquid in the stove can be by the compulsory suction, can not produce the splash during smelting, and production safety obtains guaranteeing, the cost is reduced effectively, and carbon dioxide gas 90% is retrieved, and this smelting process has played positive promotion effect in carbon recovery and carbon and cleaner production.
Description
Technical Field
The utility model belongs to the technical field of nonmetal electric smelting, in particular to a sub-vacuum electric smelting magnesium oxide and carbon dioxide capture recovery system.
Background
With the rapid development of the iron and steel smelting industry in China and China in recent years, the demand for high-quality refractory materials is increased, and the consumption of electric smelting-grade magnesium oxide is greatly increased, but the magnesite resources of high-quality raw materials in nature are reduced continuously.
Along with the reduction of high-quality magnesite resources, a new magnesite beneficiation process in the industry is developed, the raw materials for beneficiation are low-grade magnesite which cannot be utilized before, and high-quality magnesite concentrate is obtained through a flotation process, wherein the content of magnesium oxide can reach more than 47.4 percent, but in the traditional electric smelting process, the magnesite concentrate powder can be used for smelting only through pelletizing, the pelletizing cost is generally 200 yuan/ton, and the ball consumption per ton of electric smelting magnesium oxide is 2.5.
The traditional electric smelting magnesia smelting process is to use special-grade magnesite raw ore to be crushed and screened by a crusher to obtain magnesite lump ore with the granularity of 20mm-80mm, the magnesite lump ore is put into a furnace to be electrified and heated, carbon dioxide generated in the smelting process is naturally discharged, if the discharge is not smooth, splashing can be caused, and scalding danger is caused to field workers.
Disclosure of Invention
The utility model aims at providing a can reduce cost, guarantee production safety, and can effectively retrieve the sublumvacuum electric smelting magnesium oxide of carbon dioxide and catch recovery system with carbon dioxide.
The utility model discloses a sub-vacuum electric smelting magnesium oxide is smelted and carbon dioxide catches recovery system, including smelting removal dolly, furnace body, smelting a stove section of thick bamboo, feeding device, electrode elevating system, sack cleaner, transformer and automatic control system, its characterized in that: also comprises a carbon dioxide recovery system connected with the bag-type dust remover,
the furnace body is a cylindrical structure furnace body with an opening at the lower part, the bottom of the cylindrical structure furnace body is arranged on the ground of a horizontal foundation, an operation platform is arranged at the upper part of the cylindrical structure furnace body, a partition plate A, a partition plate B and a partition plate C are arranged on the cylindrical structure furnace body, electrode mounting holes are concentrically formed in the operation platform, the top of the cylindrical structure furnace body, the partition plate C, the partition plate B and the partition plate A from top to bottom, automatic feeding holes are further formed in two sides of the electrode mounting holes in the partition plate A, the partition plate A is arranged at the lower part of the cylindrical structure furnace body, so that a smelting chamber is formed at the lower part of the cylindrical structure furnace body, an access door is arranged on the side wall of the smelting chamber, the smelting furnace cylinder is arranged on a smelting moving trolley and enters and exits the smelting chamber through the access door, the partition plate B and the partition plate C are arranged in the middle of the cylindrical structure furnace body at intervals, the bag-type dust remover is arranged at the upper part of the cylindrical structure furnace body, a smoke exhaust port is formed in the side wall of the lower part of the cylindrical structure furnace body, and a smoke inlet is formed in a bag-type dust remover;
the electrode lifting mechanism comprises a graphite electrode, an electrode guide sleeve connected with the graphite electrode through a screw thread and a hydraulic telescopic mechanism connected with the upper part of the electrode guide sleeve, wherein the upper part of the hydraulic telescopic mechanism extends out of the furnace body with a cylindrical structure, the electrode guide sleeve and the graphite electrode respectively penetrate through an operation platform, the upper part of the furnace body with the cylindrical structure, a partition plate C, a partition plate B and a partition plate A from top to bottom and are inserted into the smelting furnace cylinder, a sealing device is arranged among the electrode guide sleeve, the partition plate C and the partition plate B, a sealed cylinder is formed below the middle part of the furnace body with the cylindrical structure and serves as a vacuum chamber, meanwhile, the partition plate C and the partition plate B also serve as limiting supports of the electrode guide sleeve, and the hydraulic telescopic mechanism is connected with a transformer and a control system through cables;
the feeding device is arranged at the lower part of the operating platform and comprises a feeding hopper, a feeding pipe and a star-shaped discharge valve which are arranged at the outer side of the upper part of the furnace body with a cylinder structure, the star-shaped discharge valve is arranged at the lower part of the feeding hopper, one end of the feeding pipe is communicated with the lower part of the feeding hopper through the star-shaped discharge valve, the other end of the feeding pipe passes through an automatic feeding hole on the partition plate A and is communicated with the smelting furnace cylinder, an ash discharge port is arranged at the lower part of the dust remover, and the ash discharge port is connected with the feeding hopper of the feeding device through an ash discharge pipe and a ball valve;
carbon dioxide recovery system include flue gas recovery pipe I, II vacuum pumps of flue gas recovery pipe, exhaust gas stack and carbon dioxide recovery pipe, I one end of flue gas recovery pipe be connected with the exhaust port of opening on the lateral wall of tubular structure furnace body lower part, the other end is linked together with the mouth of cigarette 1 that advances on the dust remover, flue gas recovery pipe II be Z style of calligraphy flue gas recovery pipe, the inlet end of vacuum pump and the air inlet intercommunication of Z style of calligraphy flue gas recovery pipe, the exhaust end of vacuum pump is linked together with exhaust gas stack and carbon dioxide recovery pipe respectively through the three-way valve.
Preferably, the number of the electrode mounting holes is three, and the number of the automatic feeding holes is four.
Preferably, the charging device is provided with two charging hoppers, each charging hopper is provided with two feed openings, the number of the feeding pipes and the number of the star-shaped discharge valves are four, one end of each feeding pipe is connected with the star-shaped discharge valve, the other end of each feeding pipe penetrates through the automatic charging hole to be inserted into the smelting furnace cylinder, and the number of the electrode lifting mechanisms is three.
Preferably, the partition plate C, the partition plate B and the partition plate A are made of nonmagnetic white steel plates, the sealing device comprises a bakelite insulating plate, a heat-resistant sealing rubber ring, a square sealing ring and a sealing filler, one end of the bakelite insulating plate is fixedly connected with the partition plate C and the partition plate B through bolts, the other end of the bakelite insulating plate is abutted to the outer side of the electrode guide sleeve, the heat-resistant sealing rubber ring and the square sealing ring are arranged at the lower part of the partition plate C, and the sealing filler is arranged between the partition plate C and the partition plate B, so that a cylindrical furnace body below the partition plate C and the partition plate B forms a sub-vacuum state.
Preferably, the vacuum pump is a roots vacuum pump.
The utility model has the advantages that:
because the utility model is smelted under the condition of sub-vacuum, in the smelting process, the carbon dioxide gas in the magnesia liquid in the furnace can be forcibly sucked out, so that splashing can not occur during smelting, the production safety is ensured, the negative pressure ensures that no bubble exists in the magnesia crystal, and the product density is greatly improved; in addition, as the raw materials use magnesite concentrate, the production cost is saved without ball pressing, 500 yuan/ton can be saved when one ton of electrofused magnesia is produced, the content of magnesia in the raw materials is more than 47.4 percent, and the content of harmful slag is less than 1 percent, so that the electrofused magnesia crystal bodies of the whole furnace contain magnesia more than 98 percent.
In addition, because the smelting is full sub-vacuum smelting and 90% of carbon dioxide gas is recovered, the smelting process plays a positive promoting role in carbon recovery, carbon neutralization and clean production.
Drawings
FIG. 1 is a schematic structural view of the sub-vacuum fused magnesia smelting and carbon dioxide capturing and recovering system of the present invention.
Fig. 2 is a side view of fig. 1.
Fig. 3 is a cross-sectional view taken along line D-D of fig. 1.
Fig. 4 is an enlarged view of a portion I of fig. 1.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1-4, the utility model discloses a sub-vacuum electric smelting magnesium oxide smelting and carbon dioxide capture recovery system, including smelting travelling car 1, furnace body, smelting furnace section of thick bamboo 2, feeding device, electrode elevating system, sack cleaner 14, transformer 11 and automatic control system, its characterized in that: also comprises a carbon dioxide recovery system connected with the bag-type dust collector 14,
the furnace body is a cylinder-type structure furnace body 3 with an opening at the lower part, the bottom of the cylinder-type structure furnace body 3 is arranged on the horizontal foundation ground, an operation platform 4 is arranged at the upper part of the cylinder-type structure furnace body 3, a partition plate A, a partition plate B and a partition plate C are arranged on the cylinder-type structure furnace body, electrode mounting holes are concentrically formed in the operation platform 4, the top of the cylinder-type structure furnace body 3, the partition plate C, the partition plate B and the partition plate A from top to bottom, automatic feeding holes are further formed in two sides of the electrode mounting holes in the partition plate A, the partition plate A is arranged at the lower part of the cylinder-type structure furnace body 3, a smelting chamber 7 is formed at the lower part of the cylinder-type structure furnace body 3, an access door 6 is arranged on the side wall of the smelting chamber 7, a smelting furnace cylinder 2 is arranged on a smelting moving trolley and enters and exits the smelting chamber through the access door 6, the partition plate B and the partition plate C are arranged in the middle part of the cylinder-type structure furnace body 3 at intervals, a cylinder-type bag dust remover 14 is arranged at the upper part of the cylinder-type structure furnace body 3, a smoke outlet 131 is arranged on the side wall of the cylinder-type structure furnace body 3;
the electrode lifting mechanism comprises a graphite electrode 8, an electrode guide sleeve 9 connected with the graphite electrode 8 in a threaded manner and a hydraulic telescopic mechanism 12 connected with the upper part of the electrode guide sleeve 9, wherein the upper part of the hydraulic telescopic mechanism 12 extends out of the cylindrical structure furnace body 3, the electrode guide sleeve 9 and the graphite electrode 8 respectively penetrate through an operating platform 4, the upper part of the cylindrical structure furnace body 3, a partition plate C, a partition plate B and a partition plate A from top to bottom and are inserted into the smelting furnace barrel 2, a sealing device is arranged between the electrode guide sleeve 9 and the partition plates C and B, so that a closed barrel is formed below the middle part of the cylindrical structure furnace body 3 and serves as a vacuum chamber, meanwhile, the partition plates C and B also serve as limiting supports of the electrode guide sleeve 9, and the hydraulic telescopic mechanism 12 is connected with a transformer 11 and a control system through a cable 10;
the feeding device is arranged at the lower part of the operating platform and comprises a feeding hopper 18, a feeding pipe 16 and a star-shaped discharge valve 17 which are arranged at the outer side of the upper part of the furnace body 3 with a cylinder structure, the star-shaped discharge valve 17 is arranged at the lower part of the feeding hopper 18, one end of the feeding pipe 16 is communicated with the lower part of the feeding hopper 18 through the star-shaped discharge valve 17, the other end of the feeding pipe passes through an automatic feeding hole on the partition plate A and is communicated with the smelting furnace cylinder 2, an ash discharging opening is arranged at the lower part of the bag-type dust collector, and the ash discharging opening is connected with the feeding hopper 18 of the feeding device through an ash discharging pipe 19 and a ball valve 20;
carbon dioxide recovery system include flue gas recovery pipe I13, flue gas recovery pipe II 21 vacuum pump 22, exhaust gas exhaust pipe 25 and carbon dioxide recovery pipe 24, 3 lower part lateral walls of lower part of flue gas recovery pipe I13 one end and tubular structure furnace body on the exhaust port 131 of opening be connected, the other end is linked together with the cigarette inlet 132 on the sack cleaner, flue gas recovery pipe II 21 be Z style of calligraphy flue gas recovery pipe, vacuum pump 22 the inlet end and the air inlet intercommunication of Z style of calligraphy flue gas recovery pipe, vacuum pump 22's exhaust end is linked together with exhaust gas exhaust pipe 25 and carbon dioxide recovery pipe 24 respectively through three-way valve 23.
The electrode mounting hole be three, automatic feeding hole be four.
Preferably, the number of the charging hoppers 18 of the charging device is two, each charging hopper 18 is provided with two feed openings, the number of the feeding pipes 16 and the number of the star-shaped discharge valves 17 are four, one end of each feeding pipe 16 is connected with the star-shaped discharge valve 17, the other end of each feeding pipe passes through an automatic charging hole and is inserted into the smelting furnace barrel 2, and the number of the electrode lifting mechanisms is also three, as shown in fig. 3.
Baffle C, baffle B and baffle A adopt no magnetism steel plate, sealing device include bakelite insulation board 51, heat-resisting rubber ring 52, square seal 53 and sealing filler 54 of sealing, bakelite insulation board 51 one end is respectively through bolt and baffle C and baffle B fixed connection, the other end is leaned on with electrode guide pin bushing 9's the outside and is connect, make and realize insulating between the contact tube in the electrode guide pin bushing and baffle C, the baffle B, heat-resisting rubber ring 52 and the setting of square seal 53 in baffle C's lower part, sealing filler sets up between baffle C and the baffle B, make the following tubular structure furnace body 3 of baffle C and baffle B form the sub-vacuum state, as shown in figure 4.
The process for smelting the sub-vacuum electric smelting magnesium oxide and capturing and recovering the carbon dioxide comprises the following steps:
s1) feeding
The magnesite concentrate powder is loaded into two charging hoppers 18, and then the charging openings of the charging hoppers are sealed;
s2) preparing furnace
Pushing the smelting furnace barrel 2 into a smelting chamber 7 of a furnace body 3 with a barrel structure, paving a padding layer 27 and a broken electrode 26 for conducting electricity, descending the graphite electrode 8 to enable the graphite electrode 8 to be communicated with the broken electrode 26, and then closing the access door 6;
s3) starting-up smelting and carbon dioxide recovery
S3.1) starting the vacuum pump 22, and simultaneously conducting the three-way valve with the waste gas exhaust pipe, wherein gas in the furnace body with the cylindrical structure forms a vacuum pumping state under the action of negative pressure;
s3.2) when the vacuum degree in the furnace body with the cylindrical structure reaches-0.05 mpa, feeding and power supplying are started, the temperature between the graphite electrode tips is increased, the waste gas exhaust pipe is closed by the three-way valve, and the carbon dioxide recovery pipe is opened;
and S3.3) carrying out smelting operation according to the production process of the fused magnesia, wherein in the operation process, when the temperature in the furnace reaches 2800 ℃, magnesite concentrate powder starts to decompose and melt and discharge carbon dioxide gas, at the moment, the carbon dioxide gas is sucked into the bag-type dust remover 14 under the action of negative pressure, and the purified carbon dioxide gas is sent into a carbon dioxide pressurizing and liquefying workshop through a vacuum pump 22 and a carbon dioxide recovery pipe 24 for recycling.
The utility model discloses an ash discharge port of sack cleaner adopts the ball valve to link to each other with two loading hoppers 18 respectively, roots vacuum pump is chooseed for use to the vacuum pump, and carbon dioxide pressurization liquefaction workshop is sent to with roots vacuum pump to the carbon dioxide gas after the purification, and roots vacuum pump also is the main blower of sub-vacuum, and the amount of wind is the quintuple of hourly output carbon dioxide gas volume, and vacuum pressure is-0.05 mpa.
The utility model discloses a smelt automatic control system adopts current automatic control system, and its vacuum pump, ball valve, star type unloading valve and transformer all are connected with automatic control system, and electrode elevating system smelts the rising automatic lifting graphite electrode of liquid level along with the stove simultaneously.
Because the utility model discloses whole production process all goes on under the closed condition, be the sub-vacuum smelting, gas in the magnesia liquid in the stove can be by force the suction, can not splash during the smelting, production safety obtains guaranteeing, the negative pressure makes can not have the bubble in the magnesia crystal, product density is promoted by a wide margin, because raw and other materials use is that the magnesite concentrate need not press the ball to practice thrift manufacturing cost, 500 yuan/ton can be practiced thrift in every ton of production electric smelting magnesia, the raw materials contains magnesium oxide more than 47.4%, harmful slag matter content is less than 1%, consequently the electric smelting magnesium oxide crystalline solid of whole stove, contain magnesium oxide all more than 98%, in addition by being the full sub-vacuum smelting, carbon dioxide gas 90% is retrieved, this smelting process is in to carbon recovery and carbon, cleaner production has played positive promotion effect.
Claims (5)
1. The utility model provides a sub-vacuum electric smelting magnesium oxide is smelted and carbon dioxide catches recovery system, removes dolly, furnace body, smelting furnace section of thick bamboo, feeding device, electrode elevating system, sack cleaner, transformer and automatic control system including smelting, its characterized in that: also comprises a carbon dioxide recovery system connected with the bag-type dust remover,
the furnace body is a cylindrical structure furnace body with an opening at the lower part, the bottom of the cylindrical structure furnace body is arranged on the ground of a horizontal foundation, an operation platform is arranged at the upper part of the cylindrical structure furnace body, a partition plate A, a partition plate B and a partition plate C are arranged on the cylindrical structure furnace body, electrode mounting holes are concentrically formed in the operation platform, the top of the cylindrical structure furnace body, the partition plate C, the partition plate B and the partition plate A from top to bottom, automatic feeding holes are further formed in two sides of the electrode mounting holes in the partition plate A, the partition plate A is arranged at the lower part of the cylindrical structure furnace body, so that a smelting chamber is formed at the lower part of the cylindrical structure furnace body, an access door is arranged on the side wall of the smelting chamber, the smelting furnace cylinder is arranged on a smelting moving trolley and enters and exits the smelting chamber through the access door, the partition plate B and the partition plate C are arranged in the middle of the cylindrical structure furnace body at intervals, the bag-type dust remover is arranged at the upper part of the cylindrical structure furnace body, a smoke exhaust port is formed in the side wall of the lower part of the cylindrical structure furnace body, and a smoke inlet is formed in a bag-type dust remover;
the electrode lifting mechanism comprises a graphite electrode, an electrode guide sleeve connected with the graphite electrode through a screw thread and a hydraulic telescopic mechanism connected with the upper part of the electrode guide sleeve, wherein the upper part of the hydraulic telescopic mechanism extends out of the furnace body with a cylindrical structure, the electrode guide sleeve and the graphite electrode respectively penetrate through an operation platform, the upper part of the furnace body with the cylindrical structure, a partition plate C, a partition plate B and a partition plate A from top to bottom and are inserted into the smelting furnace cylinder, a sealing device is arranged among the electrode guide sleeve, the partition plate C and the partition plate B, a sealed cylinder is formed below the middle part of the furnace body with the cylindrical structure and serves as a vacuum chamber, meanwhile, the partition plate C and the partition plate B also serve as limiting supports of the electrode guide sleeve, and the hydraulic telescopic mechanism is connected with a transformer and a control system through cables;
the feeding device is arranged at the lower part of the operating platform and comprises a feeding hopper, a feeding pipe and a star-shaped discharge valve, wherein the feeding hopper, the feeding pipe and the star-shaped discharge valve are arranged at the outer side of the upper part of the furnace body with the cylindrical structure;
carbon dioxide recovery system include flue gas recovery pipe I, II vacuum pumps of flue gas recovery pipe, exhaust gas stack and carbon dioxide recovery pipe, I one end of flue gas recovery pipe be connected with the exhaust port of opening on the lateral wall of tubular structure furnace body lower part, the other end is linked together with the mouth of cigarette 1 that advances on the dust remover, flue gas recovery pipe II be Z style of calligraphy flue gas recovery pipe, the inlet end of vacuum pump and the air inlet intercommunication of Z style of calligraphy flue gas recovery pipe, the exhaust end of vacuum pump is linked together with exhaust gas stack and carbon dioxide recovery pipe respectively through the three-way valve.
2. The system according to claim 1, wherein the number of the electrode mounting holes is three, and the number of the automatic charging holes is four.
3. The sub-vacuum electric smelting magnesia smelting and carbon dioxide capturing and recycling system according to claim 2, wherein the number of the charging hoppers of the charging device is two, each charging hopper is provided with two discharging openings, the number of the feeding pipes and the number of the star-shaped discharging valves are four, one end of each feeding pipe is connected with the star-shaped discharging valve, the other end of each feeding pipe penetrates through the automatic charging hole and is inserted into the smelting furnace cylinder, and the number of the electrode lifting mechanisms is three.
4. The system for smelting sub-vacuum fused magnesia and capturing and recovering carbon dioxide according to claim 1, wherein the partition plate C, the partition plate B and the partition plate A are made of nonmagnetic white steel plates, the sealing device comprises a bakelite insulating plate, a heat-resistant sealing rubber ring, a square sealing ring and a sealing filler, one end of the bakelite insulating plate is fixedly connected with the partition plate C and the partition plate B through bolts, the other end of the bakelite insulating plate is abutted against the outer side of the electrode guide sleeve, the heat-resistant sealing rubber ring and the square sealing ring are arranged at the lower part of the partition plate C, and the sealing filler is arranged between the partition plate C and the partition plate B, so that a cylindrical furnace body below the partition plate C and the partition plate B forms a sub-vacuum state.
5. The sub-vacuum electrofusion magnesium oxide smelting and carbon dioxide capture and recovery system according to claim 1, wherein the vacuum pump is a roots vacuum pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121671097.0U CN217715937U (en) | 2021-07-22 | 2021-07-22 | Sub-vacuum electric smelting magnesium oxide smelting and carbon dioxide capturing and recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121671097.0U CN217715937U (en) | 2021-07-22 | 2021-07-22 | Sub-vacuum electric smelting magnesium oxide smelting and carbon dioxide capturing and recycling system |
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| CN217715937U true CN217715937U (en) | 2022-11-01 |
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| CN202121671097.0U Active CN217715937U (en) | 2021-07-22 | 2021-07-22 | Sub-vacuum electric smelting magnesium oxide smelting and carbon dioxide capturing and recycling system |
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2021
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