CN212198523U - Suspension calcination high-activity forsterite powder production device - Google Patents
Suspension calcination high-activity forsterite powder production device Download PDFInfo
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- CN212198523U CN212198523U CN202020217582.XU CN202020217582U CN212198523U CN 212198523 U CN212198523 U CN 212198523U CN 202020217582 U CN202020217582 U CN 202020217582U CN 212198523 U CN212198523 U CN 212198523U
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Abstract
The utility model belongs to the technical field of forsterite powder industrial production, in particular to suspension calcines high activity forsterite powder apparatus for producing. Comprises a raw material bin, a spiral feeder, a decomposing furnace, a fuel supply end, a feed end, a fan, a spiral conveyor, a waste gas treatment device, a preheating hopper, a roasting hopper and a cooling hopper. The magnesite tailing fine powder is used as the main source of the magnesium oxide raw material, the silica fine powder is used as the main source of the silicon dioxide raw material, the whole processes of raw material preheating, calcining and powder cooling are completed in a suspension state, and the suspension calcining temperature is 800-1100 ℃. The method of the invention fully utilizes magnesite tailing resources, solves the problem of magnesite tailing accumulation, saves magnesite resources, and utilizes the advantages of suspension calcination to prepare high-activity forsterite powder.
Description
Technical Field
The invention belongs to the technical field of industrial production of forsterite powder, and particularly relates to a production device for suspension calcination of high-activity forsterite powder.
Background
Forsterite has high melting point, stable high temperature structure, low heat conductivity coefficient, high resistance to metal melt and slag erosion, and is widely used in the fields of thermal engineering, metallurgy and refractory materials. At present, the main forsterite synthesis method in the field of refractory materials is a solid-phase calcination method, magnesite, light-burned magnesia, silicalite ore, serpentine ore, talc ore and the like are used as raw materials, and the forsterite is generated by utilizing the solid-phase reaction between the magnesia and the silicon dioxide. However, the solid-phase calcination method has the disadvantages of high raw material cost, unstable product quality, complex process, complex operation and the like, so that the price of the synthesized forsterite product is generally higher, and the use of the forsterite in the refractory material industry is greatly limited.
At present, no technique for synthesizing and preparing the forsterite powder in a suspension calcination mode exists in the industry, and with the continuous development of the modern industry, the high-activity forsterite powder has huge market and wide application prospect, and can be widely applied to the industries of forsterite refractory raw materials, forsterite ceramic raw materials, forsterite coatings and the like. The suspension calcination technology can prepare high-activity powder on a large scale by raw material fine grinding, small-particle high-speed calcination and rapid cooling zone technology, and the suspension calcination technology is combined with the synthesis of the high-activity forsterite powder, so that the method has important theoretical value and great economic benefit.
However, at present, no suspension calcining equipment for synthesizing the high-activity forsterite powder exists, and the existing suspension calcining equipment cannot solve the problem, so that a production device and a production process for suspension calcining the high-activity forsterite powder are urgently needed.
Disclosure of Invention
In order to solve the problem, the utility model relates to a suspension calcines high activity forsterite apparatus for producing solves the technical problem of current forsterite powder preparation.
In order to realize the purpose of the utility model, the technical proposal of the utility model is that:
the utility model provides a suspension calcines high activity forsterite powder apparatus for producing, its characterized in that: the device comprises a raw material storage device, a multistage suspension preheater, a suspension calcining system, a multistage suspension cooler, a powder recovery device and a waste gas treatment device, wherein the raw material storage device comprises a raw material bin and a spiral feeder; the multistage suspension preheater comprises a first-stage preheating hopper, a second-stage preheating hopper and a third-stage preheating hopper; the suspension calcining system comprises a calcining hopper, a decomposing furnace and a fuel supply end; the multistage suspension cooler comprises a first-stage cooling hopper, a second-stage cooling hopper and a third-stage cooling hopper; the powder recovery device comprises a feed end, a fan and a screw conveyer; and the waste gas treatment device, multistage suspension preheater upper end is provided with raw materials storage device, and multistage suspension preheater lower extreme is through arranging material pipe and suspension calcination system intercommunication, and suspension calcination system and multistage suspension cooler intercommunication, multistage suspension cooler and powder recovery unit and waste gas treatment device intercommunication.
The tops of the multistage suspension preheater, the suspension calcining system and the multistage suspension cooler are all connected with a cyclone conveying pipe; the side surfaces of the multistage suspension preheater, the suspension calcining system and the multistage suspension cooler are all connected with cyclone return pipes; the bottoms of the multistage suspension preheater, the suspension calcining system and the multistage suspension cooler are connected with a material pipe;
the cyclone delivery pipe of the second-stage preheating hopper is used as the feeding end of the suspension calcination cooling device and is connected to the cyclone return pipe of the first-stage preheating hopper, the cyclone delivery pipe of the first-stage preheating hopper is used as the exhaust end of the suspension calcination cooling device, the material pipe of the first-stage preheating hopper is connected to the cyclone return pipe of the second-stage preheating hopper and the cyclone delivery pipe of the third-stage preheating hopper, the material pipe of the second-stage preheating hopper is connected to the cyclone return pipe of the third-stage preheating hopper and the cyclone delivery pipe of the roasting hopper, the material pipe of the roasting hopper is connected to the inside of the decomposing furnace, the top of the decomposing furnace is connected with the cyclone return pipe of the roasting hopper through an inverted U-shaped air pipe, the bottom of the decomposing furnace is connected with the cyclone delivery pipe of the first-stage cooling hopper, the material pipe of the roasting hopper is connected to the cyclone delivery pipe of the second-stage cooling hopper and the cyclone return pipe of the first-, the material pipe of second grade cooling fill is connected to the whirlwind return pipe of tertiary cooling fill, and the whirlwind return pipe of tertiary cooling fill is connected to the feed end of fan air-out pipe.
The raw material bin is of a double-row structure, namely two raw material bins are arranged in parallel and feed together.
And spiral feeders are arranged below the raw material bins.
And the inlet/outlet of the multistage suspension preheater, the inlet/outlet of the suspension calcining system and the inlet/outlet of the multistage suspension cooler are respectively provided with a temperature detector.
And a powder filtering and collecting device is arranged between the exhaust end of the multistage suspension cooler and the air inlet of the waste gas treatment device.
And the blanking pipe and the roasting section of the multistage suspension preheater are respectively provided with a flap valve with a weight balance.
The multistage suspension preheater and the multistage suspension cooler can be arranged in a single row or in two rows in parallel.
Compared with the prior art, the beneficial effects of the utility model are that: 1) magnesite resources are effectively utilized, magnesite tailing resources are recycled, and the problems of ecological environment and resource waste caused by magnesite tailing accumulation are solved; 2) preheating, decomposing and cooling in a suspension state, high heat exchange efficiency and low heat consumption of a system; 3) the synthesis reaction speed is high under the condition of magnesite tailing and silica powder, and the synthesis efficiency is high; the suspension calcination system has uniform and controllable temperature distribution and uniform synthesis reaction, and greatly improves the stability and activity of the quality of the forsterite powder; 4) the processes of high-temperature preheating, decomposition and cooling are carried out in a static device which does not operate, so that the device is stable and reliable; 5) low production cost, easy large-scale production and industrialization.
Drawings
Fig. 1 is a flow chart showing the structure of the embodiment of the present invention (in the figure, the dotted line indicates the air flow pipeline, and the arrow indicates the direction).
The labels in the figure are: 1-raw material bin, 2-spiral feeder, 3-decomposing furnace, 4-fuel supply end, 5-feed end, 6-blower, 7-spiral conveyer, 8-waste gas treatment device, 9-first-stage preheating hopper, 10-second-stage preheating hopper, 11-third-stage preheating hopper, 12-roasting hopper, 13-first-stage cooling hopper, 14-second-stage cooling hopper and 15-third-stage cooling hopper.
Detailed Description
The following describes the embodiments of the present invention in detail with reference to the accompanying drawings.
Fig. 1 is a flow chart of the structure of an embodiment of the suspension calcination high-activity forsterite powder production device of the present invention, which comprises a raw material storage device, a multi-stage suspension preheater, a suspension calcination system, a multi-stage suspension cooler, a powder recovery device and a waste gas treatment device, wherein the raw material storage device comprises a raw material bin 1 and a spiral feeder 2; the multistage suspension preheater comprises a first-stage preheating hopper 9, a second-stage preheating hopper 10 and a third-stage preheating hopper 11); the suspension calcining system comprises a calcining hopper 12, a decomposing furnace 3 and a fuel supply end 4; the multistage suspension cooler comprises a first-stage cooling hopper 13, a second-stage cooling hopper 14 and a third-stage cooling hopper 15; the powder recovery device comprises a feed end 5, a fan 6 and a screw conveyer 7; and a waste gas treatment device 8, a raw material storage device is arranged at the upper end of the multistage suspension preheater, the lower end of the multistage suspension preheater is communicated with a suspension calcining system through a discharge pipe, the suspension calcining system is communicated with a multistage suspension cooler, and the multistage suspension cooler is communicated with a powder recovery device and the waste gas treatment device 8.
The tops of the multistage suspension preheater, the suspension calcining system and the multistage suspension cooler are all connected with a cyclone conveying pipe; the side surfaces of the multistage suspension preheater, the suspension calcining system and the multistage suspension cooler are all connected with cyclone return pipes; the bottoms of the multistage suspension preheater, the suspension calcining system and the multistage suspension cooler are connected with the material pipe.
The cyclone delivery pipe of the secondary preheating hopper 10 is used as the feeding end of the suspension calcination cooling device and is connected to the cyclone return pipe of the primary preheating hopper 9, the cyclone delivery pipe of the primary preheating hopper 9 is used as the exhaust end of the suspension calcination cooling device, the material pipe of the primary preheating hopper 9 is connected to the cyclone return pipe of the secondary preheating hopper 10 and the cyclone delivery pipe of the tertiary preheating hopper 11, the material pipe of the secondary preheating hopper 10 is connected to the cyclone return pipe of the tertiary preheating hopper 11 and the cyclone delivery pipe of the roasting hopper, the material pipe of the roasting hopper 12 is connected to the decomposing furnace 3, the top of the decomposing furnace 3 is connected with the cyclone return pipe of the roasting hopper 12 through an inverted U-shaped air pipe, the bottom of the decomposing furnace 3 is connected with the cyclone delivery pipe of the primary cooling hopper 13, the material pipe of the roasting hopper 12 is connected to the cyclone delivery pipe of the secondary cooling hopper 14 and the cyclone return pipe of the primary cooling hopper 13, the material pipe of the primary cooling hopper 13 is connected to the cyclone delivery pipe of the tertiary cooling hopper 15 and the, the material pipe of the secondary cooling bucket 14 is connected to the cyclone return pipe of the tertiary cooling bucket 15, the cyclone return pipe of the tertiary cooling bucket 15 is connected to the first feeding end 6 of the air outlet pipe of the fan 6, and the material pipe of the tertiary cooling bucket 15 is connected to the second feeding end 7.
The calcining process realized by the utility model comprises the steps of feeding magnesite tailing fine powder and silica fine powder in a raw material bin 1 into a gas outlet pipeline of a second-stage preheating hopper 10 by a spiral feeder 2, immediately dispersing and suspending the magnesite tailing fine powder and silica fine powder in an air flow under the action of the air flow, and feeding the magnesite tailing fine powder and silica fine powder into a first-stage preheating hopper 9 for preheating, wherein the mixed powder after the first-stage preheating falls into a cyclone return pipe of the second-stage preheating hopper 10 along a material pipe of the first-stage preheating hopper 9, the mixed powder is fed into the second-stage preheating hopper 10 for gas-material separation and second-stage preheating by the air flow of the cyclone return pipe of the second-stage preheating hopper 11 by the air flow of a third-stage preheating hopper 11, the mixed powder after the second-stage preheating falls into the cyclone return pipe of the third-stage preheating hopper 11 along the material pipe of the second-stage preheating hopper 10, the mixed powder is fed into the third-stage preheating hopper 11 for gas-material separation and, the mixed powder after tertiary preheating falls into in the decomposing furnace 3 along the material pipe of roasting hopper 12, and the calcination temperature is controlled to be 800 ~ 1100 ℃ in the decomposing furnace 3, and the mixed powder is calcined and takes place solid phase reaction and forms forsterite powder, and the air current sends into the forsterite powder in the decomposing furnace 3 along the reverse U-shaped tuber pipe at decomposing furnace 3 top and the whirlwind return pipe of roasting hopper 12 into by the interior air current of decomposing furnace 3The gas-material separation is carried out in the roasting hopper 12, the forsterite powder in the roasting hopper 12 falls into the cyclone return pipe of the primary cooling hopper 13 along the material pipe of the roasting hopper 12, the forsterite powder is sent into the primary cooling hopper 13 along the cyclone return pipe of the primary cooling hopper 13 for gas-material separation and primary cooling by the airflow of the cyclone return pipe of the secondary cooling hopper 14, the forsterite powder after primary cooling falls into the cyclone return pipe of the secondary cooling hopper 14 along the material pipe of the primary cooling hopper 13, the forsterite powder is sent into the secondary cooling hopper 14 for gas-material separation and secondary cooling by the airflow of the cyclone return pipe of the tertiary cooling hopper 15 along the cyclone return pipe of the secondary cooling hopper 14 by the airflow of the cyclone return pipe of the tertiary cooling hopper 15 by the airflow of the air outlet pipe of the fan 6, the forsterite powder in the cyclone return pipe of the tertiary cooling hopper 15 is sent into the tertiary cooling hopper 15 along the cyclone return pipe of the tertiary cooling hopper 15 for gas-material separation and tertiary cooling Stage cooling, the forsterite powder after the tertiary cooling falls into feed end 5, transport to the storage of finished product storehouse through screw feeder 7, the waste gas of separating gets into exhaust treatment device 8 and handles the emission. The waste gas discharged from the primary cyclone preheating cylinder 9 is treated by a waste gas treatment device 8 and then discharged into the atmosphere, and the discharge concentration is less than or equal to 30mg/Nm3And the collected powder is conveyed to a feed opening of the raw material bin 1 by a conveying device and then is re-fired and calcined.
Claims (7)
1. The utility model provides a suspension calcines high activity forsterite powder apparatus for producing which characterized in that: the device comprises a raw material storage device, a multistage suspension preheater, a suspension calcining system, a multistage suspension cooler, a powder recovery device and a waste gas treatment device (8), wherein the upper end of the multistage suspension preheater is provided with the raw material storage device, the lower end of the multistage suspension preheater is communicated with the suspension calcining system through a discharge pipe, the suspension calcining system is communicated with the multistage suspension cooler, and the multistage suspension cooler is communicated with the powder recovery device and the waste gas treatment device (8);
wherein the raw material storage device comprises a raw material bin (1) and a spiral feeder (2); the multistage suspension preheater comprises a first-stage preheating hopper (9), a second-stage preheating hopper (10) and a third-stage preheating hopper (11); the suspension calcining system comprises a calcining bucket (12), a decomposing furnace (3) and a fuel supply end (4); the multistage suspension cooler comprises a first-stage cooling hopper (13), a second-stage cooling hopper (14) and a third-stage cooling hopper (15); the powder recovery device comprises a feeding end (5), a fan (6) and a screw conveyer (7); and an exhaust gas treatment device (8),
the tops of the multistage suspension preheater, the suspension calcining system and the multistage suspension cooler are all connected with a cyclone conveying pipe; the side surfaces of the multistage suspension preheater, the suspension calcining system and the multistage suspension cooler are all connected with cyclone return pipes; the bottoms of the multistage suspension preheater, the suspension calcining system and the multistage suspension cooler are connected with a material pipe;
the cyclone delivery pipe of the secondary preheating hopper (10) is used as the feeding end of the suspension calcination cooling device and is connected to the cyclone return pipe of the primary preheating hopper (9), the cyclone delivery pipe of the primary preheating hopper (9) is used as the exhaust end of the suspension calcination cooling device, the material pipe of the primary preheating hopper (9) is connected to the cyclone return pipe of the secondary preheating hopper (10) and the cyclone delivery pipe of the tertiary preheating hopper (11), the material pipe of the secondary preheating hopper (10) is connected to the cyclone return pipe of the tertiary preheating hopper (11) and the cyclone delivery pipe of the roasting hopper (12), the material pipe of the roasting hopper (12) is connected into the decomposing furnace (3), the top of the decomposing furnace (3) is connected with the cyclone return pipe of the roasting hopper (12) through an inverted U-shaped air pipe, the bottom of the decomposing furnace (3) is connected with the cyclone delivery pipe of the primary cooling hopper (13), and the material pipe of the roasting hopper (12) is connected to the cyclone delivery pipe of the secondary cooling hopper (14) and the cyclone return pipe of the primary cooling hopper (13) The material pipe of the first-stage cooling hopper (13) is connected to the cyclone conveying pipe of the third-stage cooling hopper (15) and the cyclone return pipe of the second-stage cooling hopper (14), the material pipe of the second-stage cooling hopper (14) is connected to the cyclone return pipe of the third-stage cooling hopper (15), and the cyclone return pipe of the third-stage cooling hopper (15) is connected to the feeding end (5) of the air outlet pipe of the fan (6).
2. The production device for suspension calcination of high-activity forsterite powder as claimed in claim 1, wherein the raw material bin (1) is of a double-row structure, i.e. two raw material bins (1) are arranged in parallel and feed together.
3. The production device for suspension calcination of high-activity forsterite powder as claimed in claim 1, wherein a screw feeder (2) is disposed below the raw material bin (1).
4. The apparatus for producing suspension calcined highly active forsterite powder as claimed in claim 1, wherein the inlet/outlet of the multi-stage suspension preheater, the inlet/outlet of the suspension calcination system, and the inlet/outlet of the multi-stage suspension cooler are provided with temperature detectors.
5. The production device for suspension calcination of high activity forsterite powder as claimed in claim 1, wherein a powder filtering and collecting device is disposed between the exhaust end of the multistage suspension cooler and the air inlet of the exhaust gas treatment device (8).
6. The apparatus for producing forsterite powder through suspension calcination as claimed in claim 1, wherein the discharge tube and the roasting section of the multi-stage suspension preheater are provided with flap valves with weight balance.
7. The apparatus for producing suspension calcined highly active forsterite powder as claimed in claim 1, wherein the multistage suspension preheater and multistage suspension cooler are arranged in parallel in a single row or two rows.
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| CN202020217582.XU CN212198523U (en) | 2020-02-27 | 2020-02-27 | Suspension calcination high-activity forsterite powder production device |
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| CN202020217582.XU CN212198523U (en) | 2020-02-27 | 2020-02-27 | Suspension calcination high-activity forsterite powder production device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944901A (en) * | 2021-01-28 | 2021-06-11 | 天津水泥工业设计研究院有限公司 | Suspension calcining modification furnace capable of reducing height and heat recovery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112944901A (en) * | 2021-01-28 | 2021-06-11 | 天津水泥工业设计研究院有限公司 | Suspension calcining modification furnace capable of reducing height and heat recovery system |
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