CN212127988U

CN212127988U - System device for calcining active magnesium oxide dry production line

Info

Publication number: CN212127988U
Application number: CN202020561157.2U
Authority: CN
Inventors: 于德洋
Original assignee: Individual
Current assignee: Anshan Xinke Environmental Protection Equipment Co ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-12-11
Anticipated expiration: 2030-04-16

Abstract

The utility model relates to a system's device for calcining active magnesium oxide dry process production line, its characterized in that: the device consists of a raw ore fine powder drying and grinding device, a waste gas treatment device, a raw material powder preheating device and an active magnesium oxide calcining device. The utility model discloses can make the granularity 0-20 mm, the raw ore farine of magnesite of moisture 3% - -6% in the production process of stoving grinding, raw meal powder preheat, active magnesium oxide calcination, exhaust-gas treatment, realize the make full use of and the clean civilized production of industry waste heat. The fine magnesite powder is used as raw material to produce active magnesia powder product, which provides high quality active magnesia material for industrial production of various sintered magnesia products. Meanwhile, the magnesite raw ore fine powder materials which are used as tailings and stacked in a tailing pond at present are fully utilized, the utilization rate of magnesite mine resources is improved, and the sustainable development of the magnesite industry can be promoted.

Description

System device for calcining active magnesium oxide dry production line

Technical Field

The utility model belongs to the refractory material field of giving birth to relates to an adopt magnesite raw ore farine to do the raw materials and calcine active magnesium oxide dry process production line's system device, in particular to a system device for calcining active magnesium oxide dry process production line.

Background

At present, in the industrial production of domestic refractory materials, magnesite is calcined into active magnesium oxide through an industrial kiln, a vertical kiln system device of a reverberatory furnace for calcining magnesite blocky materials is traditionally adopted, and the vertical kiln system device of the reverberatory furnace can only obtain active magnesium oxide powder through calcining blocky materials. The raw ore fine powder of the magnesite comprises raw ore fine powder (the granularity is 0-20 mm, the moisture content is 3% -6%) generated in the ore mining and crushing processes, cannot be calcined in a reverberatory furnace shaft kiln system device, and can only be stockpiled to a tailing pond as waste tailings. Along with the increase of the amount of accumulated tailings, the resource development and utilization of the magnesite raw ore fine powder accumulated in large amount become key points for improving the utilization rate of magnesite mine resources and promoting the sustainable development of the magnesite industry.

Disclosure of Invention

The utility model overcomes the defect that above-mentioned exists, the purpose is for solving in calcining the kiln system device of magnesite production active magnesium oxide, realizes adopting magnesite's magnesite tailings such as raw ore farine to make the raw materials, produces active magnesium oxide powder product, provides a calcine the system's device of the novel dry process production line of active magnesium oxide.

The system device for calcining the active magnesium oxide dry production line of the utility model has the contents briefly described:

the utility model discloses a system's device for calcining active magnesium oxide dry process production line, its characterized in that: the device consists of a raw ore fine powder drying and grinding device, a waste gas treatment device, a raw material powder preheating device and an active magnesium oxide calcining device. Raw ore fine powder drying and grinding equipment device is composed of: raw material bin, constant feeder, rubber belt conveyor, electromagnetism de-ironing separator, metal detector, row's sediment lifting machine, stoving grinding equipment, cold-blast valve II and hot-blast valve are constituteed, in the fine powder stoving grinding equipment device of raw ore: the raw material bin is connected with a feed inlet of the drying and grinding device through a constant feeder and a belt conveyor in sequence, and the belt conveyor is provided with an electromagnetic iron remover and a metal detector; a slag discharge port of the drying and grinding equipment is connected with a rubber belt conveyor through a slag discharge elevator; an air inlet pipeline of the drying and grinding equipment is connected with an air outlet pipeline of a high-temperature fan in the waste gas treatment equipment device through a hot air valve, and a cold air valve II is arranged on the air inlet pipeline of the drying and grinding equipment; the air outlet of the drying and grinding equipment is connected with the air inlet of a cloth bag dust removal device for kiln running-in the waste gas treatment equipment device through a pipeline; a temperature detector and a pressure detector are arranged in the drying and grinding equipment.

The exhaust gas treatment equipment device comprises: the device comprises a cloth bag dust removal device for running-in of the kiln, an exhaust fan, a chimney, a dust remover inlet valve, a dust remover outlet valve, a raw material chain conveyor, a raw material hoister I, a raw material warehouse, a dust remover I, a high-temperature fan and a high-temperature fan inlet valve; in an exhaust gas treatment device arrangement: the outlet pipeline of the high-temperature fan is divided into two paths, one path is connected with the air inlet pipeline of the drying and grinding equipment through a hot air valve, and the other path is connected with the air inlet of the cloth bag dust removal device for the grinding of the kiln through the inlet valve of the dust remover; an air inlet of the high-temperature fan is connected with an air outlet pipeline of a primary preheater in the raw material powder preheating equipment device through a high-temperature fan inlet valve; the air outlet of the cloth bag dust removal device for the running-in of the kiln is connected with an exhaust fan through an outlet valve of the dust remover, and the exhaust fan is connected with a chimney; the ash discharge port of the cloth bag dust removal device for the running-in of the kiln is connected with a raw material chain conveyor, and the raw material chain conveyor is connected with a raw material warehouse through a raw material hoister; the discharge port of the raw material warehouse is connected with a raw material metering device in a raw material powder preheating device; a dust remover I is arranged on the raw material warehouse, an air inlet of the dust remover I is connected with the raw material hoister I and the raw material warehouse through a pipeline, and an ash discharge port of the dust remover I is connected with the raw material warehouse; the cloth bag dust removing device for the kiln running-in is internally provided with a temperature detector and a pressure detector.

The raw meal powder preheating device comprises: the device comprises a raw material metering device, a raw material air conveying chute, a raw material elevator II, a three-way blanking device, an air locking valve I, a primary preheater, an anti-blocking ash removal device I, an air locking blanking valve II, an anti-blocking ash removal device II, a tertiary preheater, an anti-blocking ash removal device III, an air locking blanking valve IV, a secondary preheater, an air locking blanking valve III, a cold air valve I and an ignition valve; in the raw meal powder preheating device: the discharge port of the raw material warehouse is connected with the feed port of the raw material metering device, and the discharge port of the raw material metering device is connected with the feed port of the raw material elevator II through a raw material air conveying chute; the discharge hole of the raw material elevator II is connected with the feed inlet of the three-way blanking device; the three-way blanking device is provided with 2 discharge ports, one discharge port is connected with the raw material warehouse, and the other discharge port is connected with an air outlet pipeline of the secondary preheater through an air locking valve I; the outlet pipeline of the primary preheater is divided into 2 paths, one path is connected with the ignition valve, and the other path is connected with the air inlet of the high-temperature fan through the inlet valve of the high-temperature fan; the secondary preheater is connected with an air inlet of the primary preheater through an air outlet pipeline, the tertiary preheater is connected with an air inlet of the secondary preheater through an air outlet pipeline, and the kiln tail smoke chamber is connected with an inlet of the tertiary preheater through an air outlet pipeline; the discharge port of the first-stage preheater is connected with an air outlet pipeline of the third-stage preheater through a material pipe, the discharge port of the second-stage preheater is connected with a flue gas outlet pipeline of the kiln tail smoke chamber through a material pipe, and the discharge port of the third-stage preheater is connected with a feeding port of the kiln tail smoke chamber through a material pipe; an air locking discharge valve II is arranged on a discharge pipe of the primary preheater, an air locking discharge valve III is arranged on a discharge pipe of the secondary preheater, and an air locking discharge valve IV is arranged on a discharge pipe of the tertiary preheater; an anti-blocking ash removal device I is arranged on a collecting hopper of the first-stage preheater, an anti-blocking ash removal device II is arranged on a collecting hopper of the second-stage preheater, and an anti-blocking ash removal device III is arranged on a collecting hopper of the third-stage preheater; the first-stage preheater, the second-stage preheater and the third-stage preheater are provided with a temperature detector and a pressure detector.

The active magnesium oxide calcining equipment device comprises: the device comprises a kiln tail smoke chamber, a rotary calcining kiln, a kiln head cover, a fuel device, a burner, a cooler, a finished product chain conveyor, a finished product hoister, an active magnesium oxide finished product warehouse, a dust remover II, an anti-blocking ash removal device IV and an anti-blocking ash removal device V; in the active magnesium oxide calcining equipment device: the kiln tail smoke chamber is connected with a rotary calcining kiln, the rotary calcining kiln is connected with a cooler through a kiln head cover, and the cooler is connected with a magnesium oxide finished product warehouse through a finished product chain conveyor and a finished product hoister; a dust remover II is arranged on the magnesium oxide finished product warehouse and is connected with the magnesium oxide finished product warehouse and the finished product hoister through pipelines; the fuel device is connected with the burner, and the burner extends into the rotary calcining kiln through the kiln head cover; an anti-blocking ash removal device IV and an anti-blocking ash removal device V are respectively arranged at the discharging slopes of the kiln tail smoke chamber and the kiln head cover, and a temperature detector and a pressure detector are arranged in the kiln tail smoke chamber and the kiln head cover.

The utility model discloses a system's device for calcining active magnesium oxide dry process production line can make the granularity 0-20 mm, and the raw magnesite fine powder of moisture 3% - -6% realizes the make full use of and the clean civilized production of industry waste heat in the production process that stoving grinding, raw material powder preheat, active magnesium oxide calcine, exhaust-gas treatment. The fine magnesite powder is used as raw material to produce active magnesia powder product, which provides high quality active magnesia material for industrial production of various sintered magnesia products. Meanwhile, the magnesite raw ore fine powder materials which are used as tailings and stacked in a tailing pond at present are fully utilized, the utilization rate of magnesite mine resources is improved, and the sustainable development of the magnesite industry can be promoted.

Drawings

FIG. 1 is a process flow diagram of a system installation for a dry production line for calcining activated magnesium oxide;

in the figure: 1 is a raw material bin, 2 is a constant feeder, 3 is a rubber belt conveyor, 4 is an electromagnetic iron discharger, 5 is a metal detector, 6 is a slag discharge elevator, 7 is a drying and grinding device, 8 is a cold air valve II, 9 is a hot air valve, 10 is a raw ore fine powder drying and grinding device, 11 is a cloth bag dust removal device for kiln running-in, 12 is an exhaust fan, 13 is a chimney, 14 is a dust remover inlet valve, 15 is a dust remover outlet valve, 16 is a raw material chain conveyor, 17 is a raw material elevator I, 18 is a raw material warehouse, 19 is a dust remover I, 20 is a waste gas treatment device, 21 is a high temperature fan, 22 is a high temperature fan inlet valve, 23 is a raw material metering device, 24 is a raw material air conveying chute, 25 is a raw material elevator II, 26 is a three-way feeder, 27 is a wind locking and discharging valve I, 28 is a primary preheater, 29 is a dust cleaning device I, 30 is a wind locking and discharging valve II, 31 is an anti-blocking ash cleaning device II, 32 is a three-stage preheater, 33 is an anti-blocking ash cleaning device III, 34 is an air-locking blanking valve IV, 35 is a two-stage preheater, 36 is an air-locking blanking valve III, 37 is a cold air valve I, 38 is an ignition valve, 39 is a raw material powder preheating device, 40 is a kiln tail smoke chamber, 41 is a rotary calcining kiln, 42 is a kiln head cover, 43 is a fuel device, 44 is a combustor, 45 is a cooler, 46 is a finished product chain conveyor, 47 is a finished product hoister, 48 is an active magnesium oxide finished product warehouse, 49 is a dust remover II, 50 is an anti-blocking ash cleaning device IV, 51 is an anti-blocking ash cleaning device V, and 52 is an active magnesium oxide calcining device.

Detailed Description

The system device for the dry production line of the active magnesium oxide calcination device is realized by the following specific description in combination with the attached drawings.

Referring to fig. 1, the system device for calcining active magnesium oxide dry production line of the utility model is composed of: the device comprises a raw ore fine powder drying and grinding device 10, a waste gas treatment device 20, a raw material powder preheating device 39 and an active magnesium oxide calcining device 52.

The raw ore fine powder drying and grinding device 10 comprises: raw material bin 1, constant feeder 2, rubber belt conveyor 3, electromagnetism de-ironing separator 4, metal detector 5, row's sediment lifting machine 6, stoving grinding equipment 7, cold-blast valve II 8 and hot-blast valve 9 constitute, in raw ore fine powder stoving grinding equipment device 10: the raw material bin 1 is connected with a feed inlet of a drying and grinding device 7 sequentially through a constant feeder 2 and a belt conveyor 3, and the belt conveyor 3 is provided with an electromagnetic iron remover 4 and a metal detector 5; a slag discharge port of the drying and grinding equipment 7 is connected with the rubber belt conveyor 3 through a slag discharge elevator 6; an air inlet pipeline of the drying and grinding equipment 7 is connected with an air outlet pipeline of a high-temperature fan 21 in the waste gas treatment equipment device 20 through a hot air valve 9, and a cold air valve II 8 is arranged on the air inlet pipeline of the drying and grinding equipment 7; an air outlet of the drying and grinding device 7 is connected with an air inlet of a cloth bag dust removal device 11 for kiln running-in the waste gas treatment device 20 through a pipeline; the drying and grinding device 7 is internally provided with a temperature detector and a pressure detector.

The exhaust gas treatment device 20 is composed of: the device comprises a cloth bag dust removal device 11 for the running-in of the kiln, an exhaust fan 12, a chimney 13, a dust remover inlet valve 14, a dust remover outlet valve 15, a raw material chain conveyor 16, a raw material elevator I17, a raw material warehouse 18, a dust remover I19, a high-temperature fan 21 and a high-temperature fan inlet valve 22; in the exhaust gas treatment device 20: the outlet pipeline of the high-temperature fan 21 is divided into two paths, one path is connected with the air inlet pipeline of the drying and grinding equipment 7 through a hot air valve 9, and the other path is connected with the air inlet of the cloth bag dust removal device 11 for the grinding of the kiln through an inlet valve 14 of the dust remover; an air inlet of the high-temperature fan 21 is connected with an air outlet pipeline of a primary preheater 28 in the raw material powder preheating equipment device 39 through a high-temperature fan inlet valve 22; the air outlet of the bag-type dust collector 11 for the running-in of the kiln is connected with an exhaust fan 12 through an outlet valve 15 of the dust collector, and the exhaust fan 12 is connected with a chimney 13; the ash discharge port of the cloth bag dust removal device 11 for the running-in of the kiln is connected with a raw material chain conveyor 16, and the raw material chain conveyor 16 is connected with a raw material warehouse 18 through a raw material elevator I17; the discharge port of the raw material warehouse 18 is connected with a raw material metering device 23 in a raw material powder preheating device 39; a dust remover I19 is arranged on the raw material warehouse 18, an air inlet of the dust remover I19 is connected with a raw material hoister I17 and the raw material warehouse 18 through a pipeline, and an ash discharge port of the dust remover I19 is connected with the raw material warehouse 18; a temperature detector and a pressure detector are arranged in the bag-type dust collector 11 for the running-in of the kiln.

The raw meal powder preheating device 39 is composed of: the device comprises a raw material metering device 23, a raw material air conveying chute 24, a raw material elevator II 25, a three-way blanking device 26, an air locking valve I27, a primary preheater 28, an anti-blocking ash removal device I29, an air locking blanking valve II 30, an anti-blocking ash removal device II 31, a tertiary preheater 32, an anti-blocking ash removal device III 33, an air locking blanking valve IV 34, a secondary preheater 35, an air locking blanking valve III 36, a cold air valve I37 and an ignition valve 38; in the raw meal powder preheating device 39: the discharge port of the raw material warehouse 18 is connected with the feed port of the raw material metering device 23, and the discharge port of the raw material metering device 23 is connected with the feed port of the raw material elevator II 25 through a raw material air conveying chute 24; the discharge hole of the raw material elevator II 25 is connected with the feed inlet of the three-way blanking device 26; the three-way blanking device 26 is provided with 2 discharge ports, one discharge port is connected with the raw material warehouse 18, and the other discharge port is connected with an air outlet pipeline of the secondary preheater 35 through an air locking valve I27; the outlet pipeline of the primary preheater 28 is divided into 2 paths, one path is connected with the ignition valve 38, and the other path is connected with the air inlet of the high-temperature fan 21 through the high-temperature fan inlet valve 22; the secondary preheater 35 is connected with an air inlet of the primary preheater 28 through an air outlet pipeline, the tertiary preheater 32 is connected with an air inlet of the secondary preheater 35 through an air outlet pipeline, and the kiln tail smoke chamber 40 is connected with an inlet of the tertiary preheater 32 through an air outlet pipeline; the discharge port of the first-stage preheater 28 is connected with the air outlet pipeline of the third-stage preheater 32 through a material pipe, the discharge port of the second-stage preheater 35 is connected with the flue gas outlet pipeline of the kiln tail smoke chamber 40 through a material pipe, and the discharge port of the third-stage preheater 32 is connected with the feeding port of the kiln tail smoke chamber 40 through a material pipe; an air locking discharge valve II 30 is arranged on a discharge hole material pipe of the primary preheater 28, an air locking discharge valve III 36 is arranged on a discharge hole material pipe of the secondary preheater 35, and an air locking discharge valve IV 34 is arranged on a discharge hole material pipe of the tertiary preheater 32; an anti-blocking ash removal device I29 is arranged on a collecting hopper of the first-stage preheater 28, an anti-blocking ash removal device II 31 is arranged on a collecting hopper of the second-stage preheater 35, and an anti-blocking ash removal device III 33 is arranged on a collecting hopper of the third-stage preheater 32; the primary preheater 28, the secondary preheater 35, and the tertiary preheater 32 are provided with temperature detectors and pressure detectors.

The activated magnesia calcination apparatus 52 is comprised of: a kiln tail smoke chamber 40, a rotary calcining kiln 41, a kiln head cover 42, a fuel device 43, a burner 44, a cooler 45, a finished product chain conveyor 46, a finished product hoister 47, an active magnesium oxide finished product warehouse 48, a dust remover II 49, an anti-blocking ash removal device IV 50 and an anti-blocking ash removal device V51; in the activated magnesia calcination apparatus unit 52: the kiln tail smoke chamber 40 is connected with a rotary calcining kiln 41, the rotary calcining kiln 41 is connected with a cooler 45 through a kiln head cover 42, and the cooler 45 is connected with a magnesium oxide finished product warehouse 48 through a finished product chain conveyor 46 and a finished product hoister 47; a dust remover II 49 is arranged on the magnesium oxide finished product warehouse 48, and the dust remover II 49 is connected with the magnesium oxide finished product warehouse 48 and the finished product hoister 47 through pipelines; the fuel device 43 is connected with a burner 44, and the burner 44 extends into the rotary calcining kiln 41 through a kiln head cover 42; an anti-blocking ash removal device IV 50 and an anti-blocking ash removal device V51 are respectively arranged at the discharging slopes of the kiln tail smoke chamber 40 and the kiln head cover 42, and a temperature detector and a pressure detector are arranged in the kiln tail smoke chamber 40 and the kiln head cover 42.

The utility model discloses a system's device for calcining active magnesium oxide's dry process production line, during online production: in a raw ore fine powder drying and grinding device 10: magnesite raw ore fine powder (granularity is 0-20 mm, moisture is 3% -6%) in the raw material bin 1 enters the drying and grinding device 7 from a feed inlet of the drying and grinding device 7 through the quantitative feeder 2 and the belt conveyor 3, meanwhile, fuel in the fuel device 43 is combusted in the rotary calcining kiln 41 through the combustor 44, and generated high-temperature hot flue gas passes through the raw material powder preheating device 39 and enters the drying and grinding device 7 from a hot air inlet of the drying and grinding device 7 through the high-temperature fan 21 through a pipeline and the hot air valve 9; in the drying and grinding device 7, magnesite raw ore fine powder is dried and ground, wherein the technical indexes reach as follows: materials with the granularity of-200 meshes which is more than or equal to 70 percent and the water content which is less than or equal to 1 percent become magnesite raw material powder, the raw material powder is taken out by hot air, the raw material powder enters a cloth bag dust removal device 11 for kiln running-in from a hot air outlet of a drying and grinding device 7 to be collected, and the other part of coarse powder materials enters a slag discharge port of the drying and grinding device 7 to enter a slag discharge elevator 6 to be sent to a rubber belt conveyor 3; a cold air valve II 8 is arranged on a hot air inlet pipeline of the drying and grinding device 7 and is used for adjusting the temperature of hot air entering the drying and grinding device 7; the electromagnetic iron remover 4 and the metal detector 5 which are arranged on the belt conveyor 3 are respectively used for removing magnetic metal objects and non-magnetic metal objects in the raw magnesite fine powder, so that the metal objects are prevented from entering the drying and grinding equipment 7, and the damage fault of the drying and grinding equipment 7 is avoided; the drying and grinding device 7 is internally provided with a temperature detector and a pressure detector.

In the exhaust gas treatment device 20: the high temperature hot flue gas at the air outlet of the primary preheater 28 is sucked into the high temperature fan 21 through the high temperature fan inlet valve 22 by a pipeline. The flue gas at the outlet of the high-temperature fan 21 is divided into 2 paths, and one path enters the drying and grinding equipment 7 from a hot air inlet of the drying and grinding equipment 7 through a hot air valve 9 through a pipeline to provide a heat source for drying the raw ore fine powder; the other path of the mixed hot air enters the cloth bag dust removing device for kiln grinding 11 together with the mixed hot air discharged from the hot air outlet of the drying and grinding device 7 from the air inlet of the cloth bag dust removing device for kiln grinding 11 through a dust remover inlet valve 14 through a pipeline; in the cloth bag dust removing device 11 for the kiln running-in, firstly, clean gas generated after the smoke is filtered is sucked into an exhaust fan 12 from an air outlet of the cloth bag dust removing device 11 for the kiln running-in through a pipeline and an outlet valve 15 of a dust remover, and is introduced into a chimney 13 by the exhaust fan 12 to be discharged; secondly, magnesite raw material powder collected after the flue gas is filtered enters a feed inlet of a raw material chain conveyor 16 from an ash discharge port of a cloth bag dust removal device 11 for kiln running-in, and is conveyed into a raw material warehouse 18 through the raw material chain conveyor 16 and a raw material elevator I17; a dust remover I19 is arranged on the raw material warehouse 18, dust generated by the raw material hoister I17 and the raw material warehouse 18 in the material conveying process is sucked into the dust remover I19, and the dust is filtered and collected to enter the raw material warehouse 18. A temperature detector and a pressure detector are arranged in the bag-type dust collector 11 for the running-in of the kiln.

In the raw meal powder preheating device 39: magnesite raw material powder discharged from a discharge port of a raw material warehouse 18 is metered by a raw material metering device 23, enters an air outlet pipeline of a secondary preheater 35 through a raw material air conveying chute 24, a raw material hoister II 25, a three-way blanking device 26 and a wind locking valve I27, is mixed with hot air at an air outlet of the secondary preheater 35, and enters a primary preheater 28 from an air inlet of the primary preheater 28 through a pipeline; when the preheater system fails and stops feeding, magnesite raw material powder returns to the raw material warehouse 18 through the other discharge pipe of the three-way blanking device 26; in the first-stage preheater 28, the separated and collected materials enter an air outlet pipeline of the third-stage preheater 32 from a discharge port through a material pipe through an air locking blanking valve II 30, are mixed with hot air at an air outlet of the third-stage preheater 32, and enter the second-stage preheater 35 from an air inlet of the second-stage preheater 35 through a pipeline; in the secondary preheater 35, the separated and collected materials enter a smoke pipeline at an air outlet of the kiln tail smoke chamber 40 from a discharge port through a material pipe through an air locking blanking valve III 36, are mixed with hot air at the air outlet of the kiln tail smoke chamber 40, and enter the tertiary preheater 32 from an air inlet of the tertiary preheater 32 through a pipeline; in the three-stage preheater 32, the separated and collected materials enter the rotary calcining kiln 41 from the kiln tail smoke chamber 40 through a material pipe through an air locking discharge valve IV 34 and a material inlet of the kiln tail smoke chamber 40; high-temperature flue gas generated by calcination in the rotary calcining kiln 41 passes through the tertiary preheater 32, the secondary preheater 35 and the primary preheater 28 in sequence from the air outlet of the kiln tail smoke chamber 40 through pipelines, and is discharged through the air outlet pipeline of the primary preheater 28; the air outlet duct from the primary preheater 28 is divided into two paths: one way is that during normal production, the flue gas is sucked by a high-temperature fan 21 through a high-temperature fan inlet valve 22, and is sent to the drying and grinding equipment 7 and the bag-type dust collector 11 for grinding in the kiln by the high-temperature fan 21; the other path is that when the system is in abnormal production (including the conditions of ignition and temperature rise of the system, sudden failure and the like), the smoke is discharged through the ignition valve 38; a cold air valve I37 is arranged on an air outlet pipeline of the primary preheater 28 and used for adjusting the temperature of the flue gas entering the high-temperature fan 21; the anti-blocking ash cleaning device I29, the anti-blocking ash cleaning device II 36 and the anti-blocking ash cleaning device III 33 are respectively arranged on the collecting hoppers of the primary preheater 28, the secondary preheater 35 and the tertiary preheater 32 and are used for cleaning material accumulation blockage in the collecting hoppers of the preheaters and ensuring the smoothness of materials in the system device; the primary preheater 28, the secondary preheater 35 and the tertiary preheater 32 are provided with temperature detectors and pressure detectors for monitoring the temperature and pressure of the flue gas at different locations in the system.

In the activated magnesia calcination apparatus unit 52: the materials separated and collected from the three-stage preheater 32 enter the rotary calcining kiln 41 from the kiln tail smoke chamber 40 through a material pipe through the air locking valve IV 34 and a material inlet of the kiln tail smoke chamber 40; in the rotary calcining kiln 41, the fuel in the fuel device 43 enters the combustor 44 and is combusted in the kiln through the kiln head cover 42, and the heat generated by the combustion of the fuel calcines the material entering the kiln into active magnesium oxide powder; the active magnesium oxide powder in the kiln enters the cooler 45 from a discharge hole of the rotary calcining kiln 41 through a kiln head cover 10 and a feeding hole of the cooler 45; natural air enters the cooling machine from the discharge hole of the cooling machine 45 and is cooled to enter the active magnesium oxide powder of the cooling machine 45; hot air generated by cooling the active magnesium oxide powder enters the rotary calcining kiln 41 through the kiln head hood 42 and serves as kiln secondary air to provide combustion-supporting hot air for fuel combustion in the rotary calcining kiln 41; the cooled active magnesium oxide powder is conveyed from the outlet of the cooler 45 to a magnesium oxide finished product warehouse 48 through a finished product chain conveyor 46 and a finished product hoister 47; dust generated in the material conveying process of the finished product hoister 47 and the magnesium oxide finished product warehouse 48 is sucked into the finished product warehouse dust removal device 49, and the dust is filtered and collected to enter the magnesium oxide finished product warehouse 48. An anti-blocking ash removal device IV 50 and an anti-blocking ash removal device V51 are respectively arranged at the discharging slopes of the kiln tail smoke chamber 40 and the kiln head cover 42 and used for cleaning material accumulation at the discharging slopes of the kiln tail smoke chamber 40 and the kiln head cover 42; the kiln tail smoke chamber 40 and the kiln head cover 42 are provided with temperature detectors and pressure detectors for monitoring the temperature and pressure of smoke and materials.

The utility model discloses a system's device for calcining active magnesium oxide dry process production line through setting up former ore farine stoving grinding equipment device, exhaust-gas treatment equipment device, raw material powder preheating equipment device, active magnesium oxide calcining equipment device, makes magnesite raw ore farine (granularity 0-20 mm, moisture 3% - -6%) at above-mentioned stoving grinding, raw material powder preheat, active magnesium oxide calcines, exhaust-gas treatment's production process, has accomplished make full use of and the clean civilized production of industry waste heat. The method realizes the production of active magnesium oxide powder products by using the raw magnesite fine powder as the raw material, and provides high-quality active magnesium oxide raw materials for producing various sintered magnesia products in the refractory material industry. Meanwhile, the magnesite raw ore fine powder materials which are used as tailings and stacked in a tailing pond at present are fully utilized, the utilization rate of magnesite mine resources is improved, and the sustainable development of the magnesite industry can be promoted.

Claims

1. A system device for calcining active magnesium oxide dry production line is characterized in that: the device consists of a raw ore fine powder drying and grinding device (10), a waste gas treatment device (20), a raw material powder preheating device (39) and an active magnesium oxide calcining device (52), wherein the raw ore fine powder drying and grinding device (10) consists of: former feed bin (1), batcher (2), rubber belt conveyor (3), electromagnetism de-ironing separator (4), metal detector (5), row's sediment lifting machine (6), stoving grinding equipment (7), cold-blast valve II (8) and hot-blast valve (9) are constituteed, in former ore deposit fine powder stoving grinding equipment device (10): the raw material bin (1) is connected with a feed inlet of a drying and grinding device (7) through a constant feeder (2) and a rubber belt conveyor (3) in sequence, and the rubber belt conveyor (3) is provided with an electromagnetic iron remover (4) and a metal detector (5); a slag discharge port of the drying and grinding equipment (7) is connected with the rubber belt conveyor (3) through a slag discharge elevator (6); an air inlet pipeline of the drying and grinding equipment (7) is connected with an air outlet pipeline of a high-temperature fan (21) in the waste gas treatment equipment device (20) through a hot air valve (9), and a cold air valve II (8) is arranged on the air inlet pipeline of the drying and grinding equipment (7); an air outlet of the drying and grinding equipment (7) is connected with an air inlet of a cloth bag dust removal device (11) for kiln running-in a waste gas treatment equipment device (20) through a pipeline; a temperature detector and a pressure detector are arranged in the drying and grinding equipment (7).

2. The system installation for a dry line for the calcination of active magnesium oxide according to claim 1, characterized in that: the exhaust gas treatment device (20) is composed of: the device comprises a cloth bag dust removal device (11) for running-in of the kiln, an exhaust fan (12), a chimney (13), a dust remover inlet valve (14), a dust remover outlet valve (15), a raw material chain conveyor (16), a raw material elevator I (17), a raw material warehouse (18), a dust remover I (19), a high-temperature fan (21) and a high-temperature fan inlet valve (22); in an exhaust gas treatment device arrangement (20): an outlet pipeline of the high-temperature fan (21) is divided into two paths, one path is connected with an air inlet pipeline of the drying and grinding equipment (7) through a hot air valve (9), and the other path is connected with an air inlet of a cloth bag dust removal device (11) for kiln grinding through a dust remover inlet valve (14); an air inlet of the high-temperature fan (21) is connected with an air outlet pipeline of a primary preheater (28) in the raw material powder preheating equipment device (39) through a high-temperature fan inlet valve (22); an air outlet of the cloth bag dust removal device (11) for the kiln running-in is connected with an exhaust fan (12) through a dust remover outlet valve (15), and the exhaust fan (12) is connected with a chimney (13); the ash discharge port of the cloth bag dust removal device (11) for the running-in of the kiln is connected with a raw material chain conveyor (16), and the raw material chain conveyor (16) is connected with a raw material warehouse (18) through a raw material elevator I (17); the discharge port of the raw material warehouse (18) is connected with a raw material metering device (23) in a raw material powder preheating device (39); a dust remover I (19) is arranged on the raw material warehouse (18), an air inlet of the dust remover I (19) is connected with the raw material hoister I (17) and the raw material warehouse (18) through a pipeline, and an ash discharge port of the dust remover I (19) is connected with the raw material warehouse (18); a temperature detector and a pressure detector are arranged in the bag-type dust collector (11) for the running-in of the kiln.

3. The system installation for a dry line for the calcination of active magnesium oxide according to claim 1, characterized in that: the raw meal powder preheating device (39) is composed of: the device comprises a raw material metering device (23), a raw material air conveying chute (24), a raw material elevator II (25), a three-way blanking device (26), an air locking valve I (27), a primary preheater (28), an anti-blocking ash removal device I (29), an air locking blanking valve II (30), an anti-blocking ash removal device II (31), a tertiary preheater (32), an anti-blocking ash removal device III (33), an air locking blanking valve IV (34), a secondary preheater (35), an air locking blanking valve III (36), a cold air valve I (37) and an ignition valve (38); in the green powder preheating device (39): the discharge hole of the raw material warehouse (18) is connected with the feed inlet of a raw material metering device (23), and the discharge hole of the raw material metering device (23) is connected with the feed inlet of a raw material hoister II (25) through a raw material air conveying chute (24); the discharge hole of the raw material elevator II (25) is connected with the feed inlet of the three-way blanking device (26); the three-way blanking device (26) is provided with 2 discharge ports, one discharge port is connected with the raw material warehouse (18), and the other discharge port is connected with an air outlet pipeline of the secondary preheater (35) through an air locking valve I (27); an outlet pipeline of the primary preheater (28) is divided into 2 paths, one path is connected with an ignition valve (38), and the other path is connected with an air inlet of a high-temperature fan (21) through a high-temperature fan inlet valve (22); the secondary preheater (35) is connected with an air inlet of the primary preheater (28) through an air outlet pipeline, the tertiary preheater (32) is connected with the air inlet of the secondary preheater (35) through an air outlet pipeline, and the kiln tail smoke chamber (40) is connected with an inlet of the tertiary preheater (32) through an air outlet pipeline; the discharge port of the first-stage preheater (28) is connected with the air outlet pipeline of the third-stage preheater (32) through a material pipe, the discharge port of the second-stage preheater (35) is connected with the flue gas outlet pipeline of the kiln tail smoke chamber (40) through a material pipe, and the discharge port of the third-stage preheater (32) is connected with the feeding port of the kiln tail smoke chamber (40) through a material pipe; an air locking discharge valve II (30) is arranged on a discharge hole material pipe of the primary preheater (28), an air locking discharge valve III (36) is arranged on a discharge hole material pipe of the secondary preheater (35), and an air locking discharge valve IV (34) is arranged on a discharge hole material pipe of the tertiary preheater (32); an anti-blocking ash removal device I (29) is arranged on a collecting hopper of the first-stage preheater (28), an anti-blocking ash removal device II (31) is arranged on a collecting hopper of the second-stage preheater (35), and an anti-blocking ash removal device III (33) is arranged on a collecting hopper of the third-stage preheater (32); and a temperature detector and a pressure detector are arranged in the first-stage preheater (28), the second-stage preheater (35) and the third-stage preheater (32).

4. The system installation for a dry line for the calcination of active magnesium oxide according to claim 1, characterized in that: the active magnesium oxide calcining equipment device (52) is composed of: a kiln tail smoke chamber (40), a rotary calcining kiln (41), a kiln head cover (42), a fuel device (43), a burner (44), a cooling machine (45), a finished product chain conveyor (46), a finished product hoister (47), an active magnesium oxide finished product warehouse (48), a dust remover II (49), an anti-blocking ash removal device IV (50) and an anti-blocking ash removal device V (51); in an active magnesia calcination apparatus unit (52): the kiln tail smoke chamber (40) is connected with a rotary calcining kiln (41), the rotary calcining kiln (41) is connected with a cooler (45) through a kiln head cover (42), and the cooler (45) is connected with a magnesium oxide finished product warehouse (48) through a finished product chain conveyor (46) and a finished product elevator (47); a dust remover II (49) is arranged on the magnesium oxide finished product warehouse (48), and the dust remover II (49) is connected with the magnesium oxide finished product warehouse (48) and a finished product hoister (47) through pipelines; the fuel device (43) is connected with the burner (44), and the burner (44) extends into the rotary calcining kiln (41) through the kiln head cover (42); an anti-blocking ash removal device IV (50) and an anti-blocking ash removal device V (51) are respectively arranged at the blanking slopes of the kiln tail smoke chamber (40) and the kiln head cover (42), and a temperature detector and a pressure detector are arranged in the kiln tail smoke chamber (40) and the kiln head cover (42).