CN210287396U

CN210287396U - Device and system for producing sponge iron

Info

Publication number: CN210287396U
Application number: CN201920906772.XU
Authority: CN
Inventors: 李波
Original assignee: SHANDONG MACHINERY DESIGN INST
Current assignee: SHANDONG MACHINERY DESIGN INST
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-04-10
Anticipated expiration: 2029-06-17

Abstract

The utility model discloses a device and a system for producing sponge iron, wherein, the device comprises a feeding section, a reduction section, a cooling section and a deslagging section which are arranged in sequence along the horizontal direction, the feeding section is provided with a funnel, and the funnel is communicated with the reduction section through a feeding pipeline; an induced draft part is also arranged between the feeding section and the reduction section, and comprises a hot induced draft fan and a first choke valve; the reduction section comprises a reduction roller which is obliquely arranged; the reduction roller is also provided with a temperature sensor and a carbon monoxide sensor; the reduction drum is communicated with the cooling section through a discharge pipeline, and an air supply part is also arranged between the reduction drum and the cooling section and comprises an air blower and a second choke valve which are communicated with the discharge pipeline; the cooling section comprises an obliquely arranged cooling roller, one end of the cooling roller, which is close to the reduction section, is provided with a nitrogen inlet, and the other end of the cooling roller is provided with a hot nitrogen outlet; the deslagging section comprises a crusher. The device has the advantages that the energy consumption is obviously reduced, and the quality of the produced sponge iron is more uniform.

Description

Device and system for producing sponge iron

Technical Field

The utility model relates to a metallurgical technology field especially relates to a device and system of production sponge iron.

Background

Sponge iron is a steelmaking raw material which replaces scrap steel and is superior to scrap steel, and is an important raw material for developing equipment manufacturing industry.

At present, most sponge iron is produced by adopting a gas-based shaft furnace method, the shaft furnace comprises a reduction section and a cooling section, and the specific principle of producing the sponge iron is as follows: and (2) putting the prepared pellets into a shaft furnace reduction furnace, wherein the pellets are pellets made of iron ore particles, then introducing high-temperature and high-pressure carbon monoxide gas with high purity into the lower part of the reduction section, carrying out reduction reaction on the carbon monoxide gas and the pellets, and reducing the pellets to form sponge iron. And (3) introducing cooling gas into a cooling section at the lower part of the shaft furnace, cooling the sponge iron to below 50 ℃ and then discharging.

However, the above method has the following drawbacks in producing sponge iron: on one hand, the carbon monoxide as the reducing gas needs to be heated by external equipment, so that the equipment is large in scale and high in energy consumption; on the other hand, after the reducing gas enters the shaft furnace from the lower part of the reduction section, the reducing gas hardly reaches the center of the shaft furnace, so that the reducing gas flow is not uniformly distributed, and the quality of the produced sponge iron is not uniform.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that exists among the prior art, the embodiment of the utility model provides a device and system for producing sponge iron.

In a first aspect, the embodiment of the utility model provides a device of production sponge iron, include along the horizontal direction that sets gradually throw material section, reduction section, cooling zone and slagging-off section, wherein:

the feeding section is provided with a funnel which is communicated with the reduction section through a feeding pipeline;

an induced draft part is further arranged between the feeding section and the reduction section, the induced draft part comprises a hot induced draft fan, the hot induced draft fan is communicated with the feeding pipeline, and a first choke valve is arranged on a connecting pipeline of the hot induced draft fan and the feeding pipeline;

the reduction section comprises a reduction roller which is obliquely arranged, the reduction roller is communicated with the feeding pipeline, and one end of the reduction roller, which is close to the feeding pipeline, is higher than the other end of the reduction roller; the reduction drum is also provided with a temperature sensor and a carbon monoxide sensor for detecting the internal temperature and the carbon monoxide concentration;

one end of the reduction drum, which is far away from the feeding pipeline, is communicated with the cooling section through a discharging pipeline, an air supply part is also arranged between the reduction drum and the cooling section, the air supply part comprises an air blower communicated with the discharging pipeline, and a second choke valve is arranged on a connecting pipeline of the air blower and the discharging pipeline;

the cooling section comprises an obliquely arranged cooling roller, one end of the cooling roller, which is close to the reduction section, is higher than the other end of the cooling roller, one end of the cooling roller, which is close to the reduction section, is provided with a nitrogen inlet, and the other end of the cooling roller is provided with a hot nitrogen outlet;

the deslagging section comprises a crusher, and an inlet of the crusher is connected with the other end of the cooling roller through a connecting plate.

Preferably, a cylinder feed valve is arranged on the feed pipeline, and a cylinder discharge valve is arranged on the discharge pipeline.

Preferably, the reduction stage further comprises: sensor ring, insulating ring, sensor slider, wherein:

the insulating ring cover is established in the outside of reduction cylinder, the sensor ring cover is established in the outside of insulating ring, temperature sensor and carbon monoxide sensor are connected with the sensor ring electricity respectively, the sensor ring still with be used for outside transmission signal's sensor slider sliding connection.

Preferably, the reduction drum comprises a drum body, a refractory brick heat-insulating layer is arranged on the inner side of the drum body, and the temperature sensor and the carbon monoxide sensor are embedded on the refractory brick heat-insulating layer.

Preferably, both ends of the reduction drum are respectively provided with a feeding plug and a discharging plug.

Preferably, the included angle between the reduction roller and the horizontal direction is 1-4 degrees.

In a second aspect, an embodiment of the present invention provides a system for producing sponge iron, including a control system and the apparatus of any one of the first aspect.

The embodiment of the utility model provides a device and system of production sponge iron can adopt the original ball in cladding coal seam as the raw and other materials of production sponge iron, and original ball is in the reduction section, and the insufficient combustion in the coal seam on outer layer produces carbon monoxide and high fever, and carbon monoxide reduces the inside pelletizing of original ball under the high fever, obtains the sponge iron of cladding waste residue, and the sponge iron of cladding waste residue is through cooling zone cooling, behind the slagging-off section slagging-off, and then obtains sponge iron. This device need not to adopt the highly compressed carbon monoxide gas of high temperature, and the energy consumption obviously reduces, adopts the reduction cylinder that the slope set up moreover, and the carbon monoxide air current that the insufficient combustion of coal seam produced distributes evenly in the reduction cylinder, and the quality of the sponge iron of production is more even.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an apparatus for producing sponge iron according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a feeding section and an air inducing part provided by the embodiment of the present invention;

fig. 3 is a schematic structural diagram of a reduction section provided in an embodiment of the present invention;

fig. 4 is a schematic diagram of a cross-sectional structure a-a of fig. 3 according to an embodiment of the present invention;

fig. 5 is an enlarged view of the structure L in fig. 3 according to an embodiment of the present invention;

fig. 6 is an enlarged view of the structure of M in fig. 3 according to an embodiment of the present invention;

fig. 7 is an enlarged view of the structure of N in fig. 3 according to an embodiment of the present invention;

fig. 8 is a schematic structural view of the cooling section, the air supply part and the slag removal section provided by the embodiment of the present invention.

In fig. 1 to 8, the symbols represent: 1-feeding section, 11-funnel, 12-cylinder feeding valve, 2-reducing section, 21-reducing roller, 211-refractory brick heat-insulating layer, 212-cylinder body, 213-sensor slide block, 214-sensor ring, 215-insulating ring, 216-sensor lead, 217-carbon monoxide sensor, 218-temperature sensor, 219-guide rail, 22-speed reducer, 23-driving wheel, 24-support plate, 25-discharging plug, 26-motor, 27-flange, 28-asbestos plate, 29-feeding plug, 3-cooling section, 31-cooling roller, 32-nitrogen inlet, 33-cylinder discharging valve, 34-hot nitrogen outlet, 4-deslagging section, 41-crusher, 42-connecting plate, 43-sieve, 44-slag hole, 45-sponge iron outlet, 5-induced air part, 51-hot induced draft fan, 52-first choke valve, 6-air part, 61-air blower, 62-second choke valve, 7-support, 8-chassis, 9-feeding pipeline and 10-discharging pipeline.

Detailed Description

The embodiment of the utility model provides a device of production sponge iron, the raw and other materials of production sponge iron are the primitive ball of preparing in advance, and the sponge iron is made after the primitive ball passes through the device, and wherein, primitive ball includes pelletizing and the coal seam of cladding in the pelletizing outside, the coal seam is the mixture of coal and clay.

In the specific implementation process, the outer diameter of the original ball can be set to be 26-33mm, wherein the diameter of the inner pellet can be 20mm, the thickness of a coal bed outside the pellet can be 6-13mm, and the weight ratio of coal to clay in the coal bed can be 1: 0.8-1.3.

The embodiment of the utility model provides a device of production sponge iron, as shown in figure 1, the device includes that the horizontal direction sets gradually throws material section 1, reduction section 2, cooling zone 3 and slagging-off section 4, wherein:

as shown in fig. 2, the charging section 1 is provided with a hopper 11, and the previously prepared raw balls are introduced from the hopper 11, and the hopper 11 is communicated with the reduction section 2 through a feed pipe 9. Still be provided with induced air portion 5 between feeding section 1 and the reduction section 2, induced air portion 5 includes induced draft fan 51, and induced draft fan 51 and charge-in pipeline 9 intercommunication are provided with first choke valve 52 on induced draft fan 51 and the charge-in pipeline 9, and induced draft fan 51 is used for the hot-blast discharge with charge-in pipeline. By controlling the first choke valve 52, the outflow of carbon monoxide from the reduction stage can be controlled.

In the specific implementation process, the feed pipeline 9 has a certain length, and the length of the feed pipeline 9 between the induced draft fan 51 and the reduction section 2 is far greater than the length between the hopper 11 and the induced draft fan 51, so that the design aims to: on one hand, the heat is dissipated to the reduction section, and simultaneously the original ball can be preheated, so that the original ball reaches the reaction temperature as soon as possible. In a specific embodiment, the total length of the feed conduit 9 may be 30-50 m.

As shown in fig. 3-7, the reduction section 2 comprises an obliquely arranged reduction drum 21, which reduction drum 21 communicates with the feed conduit and is higher at one end near the feed conduit than at the other end. In the specific implementation process, the diameter of the reduction roller can be 5-8m, the length of the reduction roller can be 40-60m, and the included angle between the reduction roller 21 and the horizontal direction can be set to be 1-4 degrees. In the specific implementation, the reduction drum 21 can be supported on the chassis 8 by a support plate 24.

In the specific implementation process, the primary balls are in the reduction drum 21, the outer coal layer is not fully combusted to generate carbon monoxide and high heat, the carbon monoxide reduces the pellets in the primary balls under the high heat, the primary balls are changed into sponge iron coated with waste residues, therefore, the primary balls are input into the reduction drum 21, and the sponge iron coated with the waste residues is output.

The embodiment of the utility model provides an in, reduction cylinder 21 includes barrel 212, and barrel 212 inboard is provided with resistant firebrick heat preservation 211, and reduction cylinder 21's both ends set up feeding shutoff 29 and ejection of compact shutoff 25 respectively, and these two shutoff centers are provided with into discharge opening, and the feed opening communicates with charge-in pipeline 9, and the discharge opening communicates with ejection of compact pipeline 10. The feeding plug 29 and the discharging plug 25 are both connected to the reduction drum 21 through a flange 27, and in the specific implementation process, an asbestos plate 28 is further arranged between the flange 27 and the feeding plug 29 and the discharging plug 25 to ensure that the connection is sealed and airtight.

In order to make the pellet reduction more uniform, the reduction section 2 is further provided with a motor 26 for driving the reduction drum 21 to rotate, a speed reducer 22 and a driving wheel 23, the motor 26 is transmitted to the driving wheel 23 through the speed reducer 22, and the driving wheel 23 drives the reduction drum 21 to rotate together with a driven wheel (not shown) arranged at the other side of the reduction drum 21. The driving wheels 23 and the driven wheels are moved along a guide rail 219, and the guide rail 219 is welded to the reducing drum 21 in a circumferential direction of the reducing drum 21.

In the embodiment of the present invention, when the temperature inside the reduction drum 21 is 1000 ℃, the reduction efficiency is the highest. In order to ensure that the reaction temperature inside the reduction drum 21 is 1000 ℃ and the insufficient combustion state is maintained, a plurality of groups of temperature sensors 218 and carbon monoxide sensors 217 for detecting the internal temperature and the carbon monoxide concentration are arranged inside the reduction drum 21.

In one possible embodiment, both the temperature sensor 218 and the carbon monoxide sensor 217 are embedded in the refractory brick insulation 211. As shown in fig. 6, the temperature sensor 218 and the carbon monoxide sensor 217 are electrically connected to the sensor ring 214 provided outside the reduction drum 21 by the sensor lead 216, respectively, and a heat-insulating and electricity-insulating ring 215 is provided between the sensor ring 214 and the reduction drum 21 in order to prevent a short circuit of signals.

In the specific implementation process, the outer diameter of the sensor ring 214 is larger than the outer diameter of the insulating ring 215, the diameter of the insulating ring 215 is larger than the outer diameter of the reduction roller 21, the insulating ring 215 is sleeved on the outer side of the reduction roller 21, and the sensor ring 214 is sleeved on the outer side of the insulating ring 215, so that the sensor ring 214 can rotate along with the rotation of the reduction roller 21; meanwhile, the sensor ring 214 is further slidably connected to the sensor slider 213, and the sensor slider 213 may be fixedly connected to the chassis 8 through a slider bracket (not shown). When the reduction roller 21 rotates, the temperature sensor 218, the carbon monoxide sensor 217 and the sensor ring 214 are driven to rotate, the sensor sliding block 213 is fixed, and the sensor ring 214 can keep electric connection in the sliding process along the sensor sliding block 213, so that the aim of outwards transmitting signals is fulfilled. With such a design, signals detected by the temperature sensor 218 and the carbon monoxide sensor 217 are transmitted to the outside through the sensor lead 216, the sensor ring 214 and the sensor slider 213 in sequence. In a specific implementation, the sensor slider 213 may be electrically connected to an external display device or a control system.

The number of temperature sensors 218 and carbon monoxide sensors 217 may be specifically determined according to actual conditions. The embodiment of the utility model provides an in, can set up a set of every 5 ~ 8 m.

The end of the reduction drum 21 far away from the feeding pipeline 9 is provided with a discharging pipeline 10, and the discharging pipeline 10 is communicated with the cooling section 3. An air supply part 6 is further provided between the reduction drum 21 and the cooling zone 3 so that the oxygen concentration in the reduction drum 21 can maintain the insufficient combustion of the coal seam. The air supply part 6 may be a blower 61, the blower 61 communicates with the discharge duct 10, and a second choke valve 62 may be disposed on a connection duct between the blower 61 and the discharge duct 10. Fresh air enters the reduction drum 21 through the inlet of the blower 61, the second choke valve 62 and the discharge pipe 10, and the second choke valve 62 is used for controlling the inflow amount of the fresh air (oxygen) entering the reduction drum 21. The first choke valve 52 and the second choke valve 62 cooperate with each other to control the degree of vacuum, the flow rate of gas, and the reduction speed inside the reduction drum 21.

In one possible embodiment, as shown in fig. 2 and 8, the feeding pipe 9 is provided with a cylinder feeding valve 12, the discharging pipe 10 is provided with a cylinder discharging valve 33, and the feeding rate of the raw balls of the reduction drum 21 and the discharging rate of the sponge iron coated with the waste slag can be controlled by the arrangement of the cylinder feeding valve 12 and the cylinder discharging valve 33. In a specific implementation, the cylinder feed valve 12 may be disposed on a feed line between the induced heat fan 51 and the hopper 11, and the cylinder discharge valve 33 may be disposed on a discharge line between the blower 61 and the cooling section 3.

In the specific implementation process, the hopper 11, the feeding pipeline 9, the discharging pipeline 10, the pipeline of the air blower 61, the pipeline of the hot induced draft fan and the like can be fixed on the chassis 8 through the bracket 7.

The sponge iron coated with the waste slag discharged from the reduction drum 21 is in a high temperature state, and needs to be cooled under the protection of nitrogen in order to avoid secondary oxidation. The high-temperature sponge iron coated with the waste slag reaches the cooling section 3 through the discharge pipeline 10. As shown in fig. 8, the cooling section 3 includes a cooling roller 31 disposed obliquely, wherein one end of the cooling roller 31 near the reduction section 2 is higher than the other end. One end of the cooling roller 31 close to the reduction section 2 is provided with a nitrogen inlet 32, the nitrogen inlet 32 is communicated with an external nitrogen source through a pipeline, and the other end is provided with a hot nitrogen outlet 34. In particular implementations, the external nitrogen source may be a nitrogen generator.

In the specific implementation process, in order to achieve the purpose of uniform cooling, the cooling roller 31 may be driven to rotate by a driving device.

The cooled sponge iron coated with the waste residue enters a deslagging section 4, the deslagging section 4 comprises a crusher 41, and an inlet of the crusher 41 is connected with the other end of the cooling roller 31 through a connecting plate 42. The cooled sponge iron coated with the waste slag is rolled out of the cooling roller 31 and then enters the crusher 41 through the connecting plate 42. The crusher 41 separates the waste slag from the sponge iron, the waste slag passes through the screen 43 and is discharged from the waste slag port 44 for collection and outward transportation, and the sponge iron is collected through the sponge iron outlet 45 for finished product collection.

By utilizing the device for producing the sponge iron, taking 1000 tons of sponge iron produced per day as an example, the outer diameter of an original ball is 26-36mm, the diameter of an internal iron ore ball is 20mm, the weight ratio of coal to clay is 1: 0.8-1.3, the diameter D of a reduction roller is 5-8m, the length of the reduction roller is 40-60m, the included angle between the reduction roller and the horizontal direction is 1-4 degrees, the length of a feeding pipeline is 30-50m, and under the condition that the flow rate of the original ball is 500-800 pieces/second, the total energy consumption is reduced to 340-390 tons of standard coal, and the total energy consumption of the gas-based shaft furnace production process is reduced to 470-500 tons of standard coal, so that the energy consumption aspect is obviously superior to that of the existing; moreover, the metallization rate of the sponge iron produced by the device is 96-100%, the qualification rate is 99.6-100%, and the metallization rate of the gas-based shaft furnace production process is about 90%, and the qualification rate is 99.1%, so that the quality of the sponge iron produced by the device is obviously superior to that of the gas-based shaft furnace production process.

The embodiment of the utility model provides a pair of device of production sponge iron, include along the horizontal direction throw material section, reduction section, cooling zone and the slagging-off section that sets gradually, wherein: the feeding section is provided with a funnel which is communicated with the reduction section through a feeding pipeline; an induced draft part is further arranged between the feeding section and the reduction section, the induced draft part comprises a hot induced draft fan, the hot induced draft fan is communicated with the feeding pipeline, and a first choke valve is arranged on the hot induced draft fan and the feeding pipeline; the reduction section comprises a reduction roller which is obliquely arranged, the reduction roller is communicated with the feeding pipeline, and one end of the reduction roller, which is close to the feeding pipeline, is higher than the other end of the reduction roller; the reduction drum is also provided with a temperature sensor and a carbon monoxide sensor for detecting the internal temperature and the carbon monoxide concentration; one end of the reduction drum, which is far away from the feeding pipeline, is communicated with the cooling section through a discharging pipeline, an air supply part is also arranged between the reduction drum and the cooling section, the air supply part comprises an air blower communicated with the discharging pipeline, and a second choke valve is arranged on a connecting pipeline of the air blower and the discharging pipeline; the cooling section comprises an obliquely arranged cooling roller, one end of the cooling roller, which is close to the reduction section, is higher than the other end of the cooling roller, one end of the cooling roller, which is close to the reduction section, is provided with a nitrogen inlet, and the other end of the cooling roller is provided with a hot nitrogen outlet; the deslagging section comprises a crusher, and an inlet of the crusher is connected with the other end of the cooling roller through a connecting plate. The embodiment of the utility model provides a device of production sponge iron can adopt the original ball in cladding coal seam as the raw and other materials of production sponge iron, and original ball is in the reduction section, and the insufficient combustion in the coal seam on outer layer produces carbon monoxide and high fever, and the inside pelletizing of original ball is reduced to carbon monoxide under the high fever, obtains the sponge iron of cladding waste residue, and the sponge iron of cladding waste residue is after cooling zone cooling, slagging-off section slagging-off, and then obtains sponge iron. This device need not to adopt the highly compressed carbon monoxide gas of high temperature, and the energy consumption obviously reduces, adopts the reduction cylinder that the slope set up moreover, and the carbon monoxide air current that the insufficient combustion of coal seam produced distributes evenly in the reduction cylinder, and the quality of the sponge iron of production is more even.

Based on above-mentioned device of production sponge iron, the embodiment of the utility model provides a system of production sponge iron still is provided, including control system and the arbitrary device of producing sponge iron of the aforesaid. The control system is respectively electrically connected with the motor 26, the carbon monoxide sensor 217, the temperature sensor 218, the first choke valve 52, the second choke valve 62, the blower 61, the induced heat fan 51 and the like. In a possible embodiment, the control system is also electrically connected to the cylinder feed valve 12 and the cylinder discharge valve 33, respectively, when the feed line 9 is provided with the cylinder feed valve 12 and the discharge line 10 is provided with the cylinder discharge valve 33. The control system generally controls all the components and coordinates to achieve the purpose of optimizing the operation of the system.

Based on above-mentioned device and system of production sponge iron, the embodiment of the utility model provides a still provides a method of production sponge iron, and this method includes:

the method comprises the following steps: and (3) feeding the pre-prepared primary balls from a feeding section, wherein the primary balls comprise pellets and a coal layer coated outside the pellets, and the coal layer is a mixture of coal and clay.

In the specific implementation process, the device for producing the sponge iron needs to be pre-operated before the step one. The specific pre-operation mode can be as follows: combustible materials such as firewood, oil and the like are placed in the reduction roller, then ignition is carried out, the heat-insulating layer of the refractory brick in the reduction roller is burnt to red, and when the temperature reaches over 1000 ℃, the pre-prepared original ball is put in from the feeding section. After the primary ball reaches the reduction roller, the surface coal bed starts to burn, the air blower and the heat induced draft fan are started, combustion dust of combustible materials such as firewood and oil is gradually taken away by the heat induced draft fan while the combustion of the surface coal bed of the primary ball is accelerated, the heat generated by the combustion of the surface coal bed of the primary ball gradually maintains the internal combustion temperature of the reduction roller, namely the temperature is kept above 1000 ℃, and at the moment, the device for producing the sponge iron enters a normal working state.

And after the ball enters a normal working state, the pre-prepared original balls enter a reduction section through a feeding pipeline after being put into the reduction section from a feeding section.

Step two: and after the primary pellets reach the reduction section, the outer coal layer is not fully combusted to generate carbon monoxide and high heat, and the pellets are reduced by the carbon monoxide under the high heat to obtain the sponge iron coated with the waste residues.

In the specific implementation process, the air blower introduces external fresh air into the reduction drum through the discharge pipeline to provide oxygen required by insufficient combustion of the coal bed, carbon monoxide and high heat are generated in the insufficient combustion process of the coal bed, pellets inside the original balls are reduced into sponge iron in the carbon monoxide and high heat environment, and accordingly the sponge iron coated with coal bed waste residues is obtained at the tail end of the reduction drum. The waste gas generated by reduction is discharged through a hot induced draft fan, and the original balls newly entering the feeding pipeline are preheated when the waste gas passes through the feeding pipeline before being led out, so that the energy loss is further reduced.

In the specific implementation process, the first choke valve and the second choke valve can be opened, closed or adjusted in flow rate according to the detection results of the temperature sensor and the carbon monoxide sensor inside the reduction drum, for example, when the carbon monoxide sensor in a group of sensors close to the feeding pipeline detects that the concentration of the carbon monoxide is close to zero, the first choke valve is opened again to exhaust, and in this case, on one hand, energy loss is reduced, and on the other hand, environmental pollution can also be reduced. In addition, the amount of fresh air entering the reduction drum through the first choke valve is greatly related to the flow of the original ball, when the flow of the original ball is large, more oxygen is needed for insufficient combustion of the coal bed, at the moment, the flow of the first choke valve needs to be increased, and conversely, the flow of the first choke valve needs to be decreased.

Step three: and the sponge iron coated with the waste residues is cooled by nitrogen in a cooling roller, and then the waste residues coated on the outer layer of the sponge iron are crushed by a crusher in a slag removing section to obtain the sponge iron.

The same and similar parts in the various embodiments in this specification may be referred to each other.

The foregoing is only a detailed description of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a device of production sponge iron, its characterized in that includes along feeding section (1), reduction section (2), cooling section (3) and slagging-off section (4) that the horizontal direction set gradually, wherein:

the feeding section (1) is provided with a funnel (11), and the funnel (11) is communicated with the reduction section (2) through a feeding pipeline (9);

an induced draft part (5) is further arranged between the feeding section (1) and the reduction section (2), the induced draft part (5) comprises a hot induced draft fan (51), the hot induced draft fan (51) is communicated with the feeding pipeline (9), and a first choke valve (52) is arranged on a connecting pipeline of the hot induced draft fan (51) and the feeding pipeline (9);

the reduction section (2) comprises a reduction roller (21) which is obliquely arranged, and one end, close to the feeding pipeline (9), of the reduction roller (21) is higher than the other end, and is communicated with the feeding pipeline; the reduction drum (21) is also provided with a temperature sensor (218) and a carbon monoxide sensor (217) for detecting the internal temperature and the carbon monoxide concentration;

one end, far away from the feeding pipeline (9), of the reduction drum (21) is communicated with the cooling section (3) through a discharging pipeline (10), an air supply part (6) is further arranged between the reduction drum (21) and the cooling section (3), the air supply part (6) comprises an air blower (61) communicated with the discharging pipeline (10), and a second choke valve (62) is arranged on a connecting pipeline of the air blower (61) and the discharging pipeline (10);

the cooling section (3) comprises a cooling roller (31) which is obliquely arranged, one end, close to the reduction section (2), of the cooling roller (31) is higher than the other end of the cooling roller, a nitrogen inlet (32) is formed in one end, close to the reduction section (2), of the cooling roller (31), and a hot nitrogen outlet (34) is formed in the other end of the cooling roller;

the deslagging section (4) comprises a crusher (41), and an inlet of the crusher (41) is connected with the other end of the cooling roller (31) through a connecting plate (42).

2. The apparatus as claimed in claim 1, characterized in that a cylinder feed valve (12) is arranged on the feed line (9) and a cylinder discharge valve (33) is arranged on the discharge line (10).

3. The apparatus according to claim 1, wherein the reduction section (2) further comprises: sensor ring (214), insulating ring (215), sensor slider (213), wherein:

the insulating ring (215) is sleeved on the outer side of the reduction roller (21), the sensor ring (214) is sleeved on the outer side of the insulating ring (215), the temperature sensor (218) and the carbon monoxide sensor (217) are respectively and electrically connected with the sensor ring (214), and the sensor ring (214) is also in sliding connection with a sensor sliding block (213) used for transmitting signals outwards.

4. The apparatus of claim 1, wherein the reduction drum (21) comprises a drum body (212), a refractory brick insulating layer (211) is arranged on the inner side of the drum body (212), and the temperature sensor (218) and the carbon monoxide sensor (217) are embedded on the refractory brick insulating layer (211).

5. The apparatus according to claim 1, characterized in that the reduction drum (21) is provided at both ends with a feed block (29) and a discharge block (25), respectively.

6. The apparatus according to claim 1, wherein the reduction drum (21) is disposed at an angle of 1 to 4 ° with respect to the horizontal.

7. A system for producing sponge iron, comprising a control system and a device according to any one of claims 1 to 6.