Iron ore fluidized roasting atomizing water cooling and powdering device

Abstract

The application discloses a kind of iron ore fluidized roasting atomized water cooling powdering device, vertical cylinder structure is used, including cylinder, cylinder is sequentially divided into first stage shunt section, first stage cooling section, dispersion section, collection section, second stage shunt section, second stage cooling section, scattering section, third stage cooling section and third stage shunt section along height direction;First stage shunt section cylinder top is material inlet;Third stage shunt section cylinder bottom is material outlet;Cooling section is equipped with atomized water cooling spray head and nozzle;The device of the application utilizes atomized water to directly cool high-temperature iron ore material, reduces the heat transfer thermal resistance between roasted ore and cooling medium, and speeds up the cooling speed;At the end of cooling, the material is scattered to solve the problem of material blocking the discharge port;When iron ore material is stored, the material has a certain moisture content, which can reduce the heat storage in the material during dry powder storage and prevent the oxidation of stored material;The application also has the characteristics of simple structure, easy disassembly and assembly, and meets the requirements of industrial large-scale application.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of fluidized roasting of iron ore, in particular to a kind of atomized water cooling and powdering device for fluidized roasting of iron ore. BACKGROUND

[0002] The powder iron ore fluidized roasting technology is more and more widely used in industry, and with the expansion of production scale, a large amount of powder roasting iron ore needs to be temporarily stored for subsequent processing. However, the temperature of the iron ore material after completing the roasting process is usually above 500℃, in order to prevent the iron ore material from being oxidized due to high temperature, it needs to be cooled quickly in a short time.

[0003] In the current cooling technology, the direct water quenching method is the most common, however, although the water quenching method can achieve rapid cooling of the roasting iron ore, the slurry formed after water quenching will lead to high storage cost, which is not suitable for large-scale industrial application. In addition, a heat exchanger can also be used to indirectly cool the roasting iron ore, however, the heat exchanger cooling method has the problems of large thermal resistance and low heat transfer coefficient, the high-temperature iron ore material stays in the cooling device for a long time, and it is also easy to cause uneven cooling, and there is still heat accumulation in the iron ore material when it is stored, which leads to high internal temperature of the iron ore material when it is stored, and easy to cause oxidation reaction, thereby affecting the subsequent separation process. SUMMARY

[0004] In view of the problems existing in the prior art, the present application provides an atomized water cooling and powdering device for fluidized roasting of iron ore, which directly cools the high-temperature iron ore material with atomized water, reduces the heat transfer resistance between the roasting ore and the cooling medium, and accelerates the cooling speed. At the end of the cooling period, the material is dispersed to solve the problem of material blocking the discharge port. When the iron ore material is stored, due to the certain water content in the material, the heat accumulation in the material during dry powder storage can be reduced, and the oxidation phenomenon of the stored material can be avoided. The present application also has the characteristics of simple structure, easy disassembly and assembly, and meets the requirements of large-scale industrial application.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme: an atomized water cooling and powdering device for fluidized roasting of iron ore, which adopts a vertical cylindrical structure, including a cylinder, the cylinder is divided into a first flow separation section, a first cooling section, a dispersion section, a collection section, a second flow separation section, a second cooling section, a dispersion section, a third cooling section and a third flow separation section along the height direction; the top of the cylinder of the first flow separation section is provided with a material inlet; the bottom of the cylinder of the third flow separation section is provided with a material outlet.

[0006] A first flow separation plate is arranged in the middle of the cylinder of the first flow separation section, and a first material baffle is symmetrically arranged on both sides of the first flow separation plate. A first negative pressure air suction port is arranged on the side of the first material baffle.

[0007] The middle part of the barrel of the primary cooling section is provided with a primary cooling water pipe, a plurality of primary atomized water cooling nozzles are installed on the pipe body of the primary cooling water pipe, and a primary atomized water cooling nozzle is symmetrically installed on the barrel on both sides of the primary cooling water pipe.

[0008] The middle part of the barrel of the dispersion section is provided with a plurality of material dispersion baffles, and an observation window and a first temperature measuring sensor are respectively arranged on the barrel of the dispersion section.

[0009] The middle part of the barrel of the collection section is provided with a material collection baffle, and a second negative pressure air outlet is arranged on the barrel on the side of the material collection baffle.

[0010] The middle part of the secondary flow section is provided with a secondary flow baffle, and a secondary material baffle is symmetrically arranged on both sides of the secondary flow baffle.

[0011] The middle part of the barrel of the secondary cooling section is provided with a secondary cooling water pipe, a plurality of secondary atomized water cooling nozzles are installed on the pipe body of the secondary cooling water pipe, and a secondary atomized water cooling nozzle is symmetrically installed on the barrel on both sides of the secondary cooling water pipe.

[0012] The middle part of the barrel of the dispersion section is provided with a plurality of material dispersion baffles, and an observation window and a first temperature measuring sensor are respectively arranged on the barrel of the dispersion section.

[0013] The middle part of the barrel of the third cooling section is provided with a third cooling water pipe, a plurality of third atomized water cooling nozzles are installed on the pipe body of the third cooling water pipe, and a material blocking inclined plate is symmetrically installed on the barrel on both sides of the third cooling water pipe.

[0014] The middle part of the barrel of the third flow section is provided with a third flow baffle, and a third temperature measuring sensor is arranged on the barrel obliquely below the third flow baffle.

[0015] The beneficial effects of the present application are as follows:

[0016] The iron ore fluidized roasting atomized water cooling and powdering device of the present application directly cools the high-temperature iron ore material by using atomized water, reduces the heat transfer thermal resistance between the roasted ore and the cooling medium, and accelerates the cooling speed; at the end of the cooling, the material is dispersed to solve the problem of material blocking the discharge port; when the iron ore material is stacked, the material has a certain moisture content, which can reduce the heat accumulation in the material during the dry powder stacking process and avoid the oxidation of the stacked material; the present application also has the characteristics of simple structure, easy disassembly and assembly, and meeting the industrial large-scale application. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 Fig. 1 is a structural schematic view of an iron ore fluidized roasting atomized water cooling and powdering device of the present application;

[0018] Figure 2 Fig. 2 is a sectional view of A-A in Fig. 1; Figure 1 Fig. 3 is a sectional view of B-B in Fig. 1;

[0019] In the figure, I is a first shunt section, II is a first cooling section, III is a dispersion section, IV is a collection section, V is a second shunt section, VI is a second cooling section, VII is a dispersion section, VIII is a third cooling section, IX is a third shunt section, 1 is a cylinder, 2 is a material inlet, 3 is a material outlet, 4 is a first shunt plate, 5 is a first material blocking plate, 6 is a first negative pressure air outlet, 7 is a first cooling water pipe, 8 is a first atomized water cooling nozzle, 9 is a first atomized water cooling spray head, 10 is a material dispersion baffle, 11 is an observation window, 12 is a first temperature sensor, 13 is a material collection baffle, 14 is a second negative pressure air outlet, 15 is a second shunt plate, 16 is a second material blocking plate, 17 is a second cooling water pipe, 18 is a second atomized water cooling nozzle, 19 is a second atomized water cooling spray head, 20 is a first dispersion plate, 21 is a second dispersion plate, 22 is a first bevel gear, 23 is a first cylindrical gear, 24 is a second cylindrical gear, 25 is a driving motor, 26 is a second bevel gear, 27 is a third cooling water pipe, 28 is a third atomized water cooling nozzle, 29 is a material blocking inclined plate, 30 is a third shunt plate, 31 is a second temperature sensor, and 32 is a third temperature sensor. DETAILED DESCRIPTION

[0020] The present application will be further described in detail below in combination with the drawings and specific embodiments.

[0021] As Figure 1 , 2As shown, a kind of iron ore fluidized roasting atomizing water cooling powder preparation device adopts vertical cylinder structure, including cylinder body 1, cylinder body 1 is successively divided into first stage flow section I, first stage cooling section II, dispersion section III, collection section IV, second stage flow section V, second stage cooling section VI, scattering section VII, third stage cooling section VIII and third stage flow section IX along height direction;The top of the cylinder body 1 of the first stage flow section I is provided with material inlet 2;The bottom of the cylinder body of the third stage flow section IX is provided with material outlet 3.

[0022] The middle part of the cylinder body 1 of the first stage flow section I is provided with first stage flow plate 4, and first stage material baffle 5 is symmetrically arranged on the both sides of first stage flow plate 4, and first negative pressure air outlet 6 is arranged on the side of the cylinder body 1 of first stage material baffle 5.

[0023] The middle part of the cylinder body 1 of the first stage cooling section II is provided with first stage cooling water pipe 7, a plurality of first stage atomizing water cooling nozzles 8 are installed on the pipe body of first stage cooling water pipe 7, and first stage atomizing water cooling spray head 9 is symmetrically installed on the both sides of the cylinder body 1 of first stage cooling water pipe 7.

[0024] The middle part of the cylinder body 1 of the dispersion section III is provided with a plurality of material dispersion baffle 10, and observation window 11 and first temperature sensor 12 are respectively arranged on the cylinder body 1 of dispersion section III.

[0025] The middle part of the cylinder body 1 of the collection section IV is provided with material collection baffle 13, and second negative pressure air outlet 14 is arranged on the side of the cylinder body 1 of material collection baffle 13.

[0026] The middle part of the second stage flow section V is provided with second stage flow plate 15, and second stage material baffle 16 is symmetrically arranged on the both sides of second stage flow plate 15.

[0027] The middle part of the cylinder body 1 of the second stage cooling section VI is provided with second stage cooling water pipe 17, a plurality of second stage atomizing water cooling nozzles 18 are installed on the pipe body of second stage cooling water pipe 17, and second stage atomizing water cooling spray head 19 is symmetrically installed on the both sides of the cylinder body 1 of second stage cooling water pipe 17.

[0028] The first dispersing plate 20 and the second dispersing plate 21 are arranged in the barrel 1 of the dispersing section VII, the first dispersing plate 20 and the second dispersing plate 21 are arranged in parallel, rotary shafts are fixedly arranged at both ends of the first dispersing plate 20 and the second dispersing plate 21, the rotary shafts are rotatably connected with the barrel 1 through bearings, the rotary shafts at both ends of the first dispersing plate 20 extend to the outside of the barrel 1, and the first bevel gear 22 and the first cylindrical gear 23 are respectively arranged on the rotary shafts at both ends, the rotary shaft at one end of the second dispersing plate 21 extends to the outside of the barrel 1, and the second cylindrical gear 24 is arranged on the rotary shaft, the first cylindrical gear 23 is engaged with the second cylindrical gear 24, the driving motor 25 is fixedly arranged outside the barrel 1, the second bevel gear 26 is arranged on the motor shaft of the driving motor 25, and the first bevel gear 22 is engaged with the second bevel gear 26, and the second temperature sensor 31 is arranged on the barrel 1 at the side of the first dispersing plate 20 or the second dispersing plate 21.

[0029] The third cooling water pipe 27 is arranged in the middle of the barrel 1 of the three-stage cooling section VIII, the third atomizing water cooling nozzles 28 are arranged on the pipe body of the third cooling water pipe 27, and the material blocking inclined plates 29 are symmetrically arranged on the barrel 1 at both sides of the third cooling water pipe 27.

[0030] The third shunt plate 30 is arranged in the middle of the barrel 1 of the three-stage shunt section IX, and the third temperature sensor 32 is arranged on the barrel 1 obliquely below the third shunt plate 30.

[0031] The following describes a one-time use process of the application in combination with the drawings:

[0032] Before work, a water storage tank is arranged beside the barrel 1, the water storage tank is filled with clean water, a water pump is further arranged, the water suction port of the water pump is connected with the water storage tank, the water outlet of the water pump is connected with a four-way valve, three water outlets of the four-way valve are respectively connected with a water valve, and the three water valves are respectively a first water valve, a second water valve and a third water valve.

[0033] The water outlet of the first water valve is also connected with a four-way valve, three water outlets of the four-way valve are respectively connected with the first cooling water pipe 7 and the first atomizing water cooling nozzles 9 at both sides of the first cooling water pipe 7 through water pipes. The water outlet of the second water valve is also connected with a four-way valve, three water outlets of the four-way valve are respectively connected with the second cooling water pipe 17 and the second atomizing water cooling nozzles 19 at both sides of the second cooling water pipe 17 through water pipes. The water outlet of the third water valve is directly connected with the third cooling water pipe 27 through a water pipe.

[0034] A negative pressure fan is further arranged beside the barrel 1, the air inlet of the negative pressure fan is connected with a three-way valve, two air inlets of the three-way valve are respectively connected with the first negative pressure air suction port 6 and the second negative pressure air suction port 14 through pipelines.

[0035] Before cooling, the valve core of the first water valve, the second water valve and the third water valve is adjusted to a set opening degree, and the water pump is started, under the pumping action, the clear water in the water storage tank is sprayed in the form of atomized water through the first atomized water cooling nozzle 8, the first atomized water cooling nozzle 9, the second atomized water cooling nozzle 18, the second atomized water cooling nozzle 19 and the third atomized water cooling nozzle 28. The negative pressure fan is started, and the internal negative pressure of the cylinder 1 is formed through the gas suction of the first negative pressure gas suction port 6 and the second negative pressure gas suction port 14. The driving motor 25 is started, the second bevel gear 26 is driven to rotate, the first bevel gear 22 engaged with the second bevel gear 26 is driven to rotate, the first dispersing plate 20 is driven to rotate through the first bevel gear 22, the first cylindrical gear 23 is driven to rotate, the second cylindrical gear 24 engaged with the first cylindrical gear 23 is driven to rotate, and finally the second dispersing plate 21 is driven to rotate.

[0036] When the above preparation work is completed, the iron ore material with a temperature of 400-700℃ and a particle size of +400 mesh content of more than 60% can be sent into the cylinder 1 from the material inlet 2, the material first falls onto the first shunt plate 4, the material is shunted into two paths and continues to fall, one path of the material passes between the right first atomized water cooling nozzle 8 and the first atomized water cooling nozzle 9, and the other path of the material passes between the left first atomized water cooling nozzle 8 and the first atomized water cooling nozzle 9, the two paths of the material realize contact with the atomized water and complete the first cooling.

[0037] When the material completes the first atomized water cooling, it continues to fall onto the material dispersion baffle 10, and the material is dispersed by the plurality of material dispersion baffles 10, so that the atomized water and the material realize more sufficient mixing, and at the same time, the material dispersion and the atomized water spraying can be observed through the observation window 11, and the temperature of the material after the first cooling can be monitored in real time by the first temperature sensor 12 during the observation process.

[0038] When the material completes the dispersion, it continues to fall onto the material collection baffle 13, and the dispersed material is re-collected by the material collection baffle 13, and the collected material continues to fall and falls onto the second shunt plate 15, so that the material is shunted into two paths again, one path of the material passes between the right second atomized water cooling nozzle 18 and the second atomized water cooling nozzle 19, and the other path of the material passes between the left second atomized water cooling nozzle 18 and the second atomized water cooling nozzle 19, the two paths of the material realize contact with the atomized water and complete the second cooling.

[0039] When the material is cooled by the second time, it will continue to fall on the first and second scattering plates 20 and 21, and the material is scattered by the first and second scattering plates 20 and 21, so that the atomized water and the material are mixed more fully, and the temperature of the material can be monitored by the second temperature sensor 31 in real time. When the material is scattered, it will continue to fall on the material blocking inclined plate 29 and be collected again. During the collection of the material, the third atomized water cooling nozzle 28 sprays atomized water to cool the material for the third time.

[0040] After the material is cooled for the third time, the collected material continues to fall on the third flow distribution plate 30, and the material is distributed into two paths and then falls. The two paths of the material fall and then are collected at the material outlet 3 and discharged. The discharged material can enter the storage stage. Before the material is discharged, the temperature of the material before being discharged can be monitored by the third temperature sensor 32 in real time. After the third cooling, the temperature of the material discharged can be reduced to 100-130℃, and the moisture content of the material can be controlled to be 2-8%.

[0041] Specifically, taking the cooling treatment of hematite roasting ore as an example, the feeding temperature of the material inlet 2 is 480-500℃, the feeding amount is 80 kg / h, the valve core opening of the first water valve is set to 1 / 4, and the valve core openings of the second and third water valves are set to 1 / 8. During the cooling of the material, the material temperature monitored by the first temperature sensor 12 in real time is about 270℃, the material temperature monitored by the second temperature sensor 31 in real time is about 160℃, and the material temperature monitored by the third temperature sensor 32 in real time is about 120℃. After the material is stored for half an hour, the internal temperature of the material pile is lower than 80℃. Compared with the traditional water jacket cooling method, the discharge temperature is reduced by about 20℃, and the internal temperature of the material pile is reduced by about 50℃.

[0042] Taking the cooling treatment of hematite roasting ore as an example, the feeding temperature of the material inlet 2 is 480-500℃, the feeding amount is 80 kg / h, the valve core opening of the first water valve is set to 1 / 4, and the valve core openings of the second and third water valves are set to 1 / 8. During the cooling of the material, the material temperature monitored by the first temperature sensor 12 in real time is about 270℃, the material temperature monitored by the second temperature sensor 31 in real time is about 160℃, and the material temperature monitored by the third temperature sensor 32 in real time is about 120℃. After the material is stored for half an hour, the internal temperature of the material pile is lower than 80℃. Compared with the traditional water jacket cooling method, the discharge temperature is reduced by about 20℃, and the internal temperature of the material pile is reduced by about 50℃.

[0043] The scheme in the embodiment is not used to limit the patent protection scope of the present application, and any equivalent implementation or change without departing from the present application is included in the patent scope of the present application.

Claims

1. A fluidized bed roasting atomized water-cooled pulverizing device for iron ore, characterized in that: The device adopts a vertical cylindrical structure, including a cylindrical body, which is divided into a primary diversion section, a primary cooling section, a dispersion section, a collection section, a secondary diversion section, a secondary cooling section, a dispersing section, a tertiary cooling section, and a tertiary diversion section along the height direction; the top of the cylindrical body of the primary diversion section is set as the material inlet; the bottom of the cylindrical body of the tertiary diversion section is set as the material outlet. A primary flow divider plate is provided in the middle of the cylinder of the primary flow divider section, and primary baffle plates are symmetrically provided on both sides of the primary flow divider plate. A first negative pressure exhaust port is provided on the cylinder on the side of the primary baffle plate. A primary cooling water pipe is provided in the middle of the cylinder of the primary cooling section. Several primary atomizing water cooling nozzles are installed on the pipe body of the primary cooling water pipe. Primary atomizing water cooling nozzles are symmetrically installed on the cylinder body on both sides of the primary cooling water pipe. Several material dispersion baffles are provided in the middle of the cylinder of the dispersion section, and observation windows and a first temperature sensor are respectively provided on the cylinder of the dispersion section. A material collection baffle is provided in the middle of the cylinder of the collection section, and a second negative pressure exhaust port is provided on the cylinder on the side of the material collection baffle. A secondary diversion plate is provided in the middle of the secondary diversion section, and secondary baffles are symmetrically provided on both sides of the secondary diversion plate; A secondary cooling water pipe is provided in the middle of the cylinder of the secondary cooling section. Several secondary atomizing water cooling nozzles are installed on the pipe body of the secondary cooling water pipe. Secondary atomizing water cooling nozzles are symmetrically installed on the cylinder body on both sides of the secondary cooling water pipe. The cylinder of the dispersing section is provided with a first dispersing plate and a second dispersing plate, which are distributed in parallel. Rotary shafts are fixed at both ends of both the first and second dispersing plates, and these shafts are rotatably connected to the cylinder via bearings. The rotary shafts at both ends of the first dispersing plate extend to the outside of the cylinder, and a first bevel gear and a first cylindrical gear are respectively mounted on the rotary shafts at both ends. Only one end of the rotary shaft of the second dispersing plate extends to the outside of the cylinder, and a second cylindrical gear is mounted on the rotary shaft. The first cylindrical gear meshes with the second cylindrical gear. A drive motor is fixedly installed outside the cylinder, and a second bevel gear is mounted on the motor shaft of the drive motor. The first bevel gear meshes with the second bevel gear. A second temperature sensor is provided on the cylinder to the side of either the first or second dispersing plate. A three-stage cooling water pipe is provided in the middle of the cylinder of the three-stage cooling section. Several three-stage atomizing water cooling nozzles are installed on the pipe body of the three-stage cooling water pipe. Material baffles are symmetrically installed on the cylinder on both sides of the three-stage cooling water pipe. A third-stage flow divider plate is provided in the middle of the cylinder of the three-stage flow divider section, and a third temperature sensor is provided on the cylinder obliquely below the third-stage flow divider plate.

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