CN209778910U - Blast furnace slag treatment equipment - Google Patents
Blast furnace slag treatment equipment Download PDFInfo
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- CN209778910U CN209778910U CN201821983011.6U CN201821983011U CN209778910U CN 209778910 U CN209778910 U CN 209778910U CN 201821983011 U CN201821983011 U CN 201821983011U CN 209778910 U CN209778910 U CN 209778910U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
The utility model discloses a blast furnace slag treatment facility, include: chimney, sedimentation tank, slag extraction tank, water absorption well, separator, disc dehydrator, mixing water pump, slag flushing water pump. The utility model discloses equipment structure area is little, compact structure, and water can cyclic utilization, and slag treatment efficiency is high, the energy consumption is low.
Description
Technical Field
The utility model relates to a blast furnace slag processing technology, in particular to a blast furnace slag processing device.
Background
In blast furnace iron-making production, the treatment process of the furnace slag is mainly divided into two treatment methods, namely a dry slag method and a water slag method. The dry slag method is that blast furnace slag is put into a dry slag pit and cooled by air, water is sprayed on the surface of the slag layer, and a multilayer thin layer slag discharging method is adopted, and the slag is cooled and crushed into compact slag blocks with proper granularity. The grain slag method is that high pressure water or machine is used to wash slag into grain slag before furnace, then the slag and water are separated, the slag washing water is recycled, and the finished grain slag can be used as cement raw material, concrete aggregate, etc. Compared with the dry slag treatment, the grain slag treatment has the advantages of small slag particle size, easy crushing, centralized production method, capability of being treated at a position far away from a blast furnace and higher production capacity. According to different filtering modes of the grain slag, the method can be divided into a filter tank filtering method, and a sediment tank method and a bottom filtering method are typical and mainly used; dehydrating in a dehydrating tank, wherein the representative method mainly comprises a Lasa method and a Yongtian method; the mechanical dewatering is typically performed by a screw method, an INBA method, a drawing method (wheel method), or a disc method.
In the disc method, molten slag flows out of a flow nozzle, is quenched by high-pressure water flow sprayed by a granulating water nozzle positioned below the flow nozzle and is flushed to a launching screen for crushing, a slag-water mixture and steam enter a bin type sedimentation tank filled with water, and the generated steam is diffused to the atmosphere along a chimney. At the lower part of the sedimentation tank, water enters a nearby water tank through water holes. If the lower water hole is blocked, water flows into the water tank through the upper water hole. Through precipitation, the clean water overflows to a clean water tank and is sent back to the granulator by a water pump for recycling.
However, in the disc method used at present, circulating water is not fully utilized, water resource waste is large, and the disc method does not meet the current environmental protection requirements. And the equipment planning and design are unreasonable, and the floor area is large.
SUMMERY OF THE UTILITY MODEL
the utility model solves the technical problem of providing a blast furnace slag treatment device, which has small occupied area of the device structure, compact structure, cyclic utilization of water, high slag treatment efficiency and low energy consumption.
The technical scheme is as follows:
A blast furnace slag processing facility comprising: a chimney, a sedimentation tank, a slag extraction tank, a water absorption well, a separator, a disc dehydrator, a mixing water pump and a slag flushing water pump; the chimney is arranged at the top of the sedimentation tank, the slag extracting tank is arranged at the side part of the sedimentation tank, the water suction well is arranged at the side part of the slag extracting tank, and the sedimentation tank is provided with an exhaust port; a slag chute and a punching box are arranged on the left side wall of the sedimentation tank, the punching box is positioned at the lower part of the slag chute, and the punching box is connected with a slag flushing water pump through a pipeline; the sedimentation tank is separated from the slag extracting tank through a first partition wall, a gap is reserved at the bottom of the first partition wall, and a first through hole is formed in the upper part of the first partition wall; a water return port is formed in the first partition wall and is connected with a water return tank through a pipeline; a grate is arranged in the sedimentation tank and is positioned at the lower parts of the slag chute and the punching box; one end of the grate is connected with a slag conveyor; the slag extracting pool and the suction well are separated by a second partition wall, and the second partition wall is provided with a second through hole; a mixed water stirring pipeline, a slag extracting pipeline and a compressed air pipeline are arranged in the slag extracting pool, the bottom of the slag extracting pipeline is connected with a pneumatic elevator, and the top of the slag extracting pipeline is connected with a separator through a pipeline; the top of the compressed air pipeline is connected with a compressed air tank or an air compressor through a pipeline; the side wall of the lower part of the water suction well is provided with a water inlet of a mixing water pump and a water inlet of a slag flushing water pump, and the water inlet of the mixing water pump is positioned at the upper part of the water inlet of the slag flushing water pump; the inlet of the mixing water pump is connected with the water inlet of the mixing water pump, and the outlet of the mixing water pump is connected with a mixing water pipeline through a pipeline; the inlet of the slag flushing water pump is connected with the water inlet of the slag flushing water pump, and the outlet of the slag flushing water pump is connected with the flushing box through a pipeline; the slag discharge port on the side part of the separator is connected with the feed inlet of the disc dehydrator through an overflow pipe.
Further, the bottom of the grate is provided with a bubbling device which is connected with a compressed air tank or an air compressor through a pipeline.
Furthermore, the bottoms of the first through hole and the second through hole are positioned on the same plane.
furthermore, the bottom surfaces of the sedimentation tank and the slag extracting tank are inclined planes, and the joint of the two bottom surfaces is positioned at the bottom parts of the mixing water pipeline, the slag extracting pipeline and the compressed air pipeline.
Further, an exhaust port on the side part of the separator is connected with a chimney through a pipeline, and an exhaust port of the disc dehydrator is connected with the chimney through a pipeline.
Furthermore, a water return groove is formed in the bottom of a rotating disc of the disc dehydrator, a water slag bin is arranged on the lower portion of a slag outlet in the bottom of the disc dehydrator, and a belt conveyor is arranged on the lower portion of the water slag bin.
Furthermore, the rotating disc is divided into grids, a slag box with a filter screen is arranged in each grid, a door is arranged at the bottom of each grid, and a water granulated slag bin is provided with a door.
The utility model discloses technical effect includes:
1. The equipment has light weight, small occupied area, compact structure, low investment, convenient installation and maintenance and cyclic utilization of water.
2. the system is safe and reliable.
The process mainly relies on mechanical crushing of the slag, so that it works safely regardless of high or low slag temperature or slag with iron (even up to 40%), and no additional dry slag pit is required.
3. The circulating water quantity is small, and the energy consumption is low.
Circulating water is only used for cooling granulated slag particles, so that the required circulating water amount is less, and the slag-water ratio is only 1:2 (1: 8-1: 10 in the traditional process); the electric energy consumption per ton of slag is 2.5kWh, which is only 20% -30% of that of other methods.
4. The water content of the granulated slag is low.
The temperature of the finished product slag on the belt conveyor is as high as about 90 ℃, water is evaporated by self heat, and the moisture content of the finished product slag is lower than 10%.
5. The attention is paid to environmental protection.
The furnace slag is processed in a sealed state, and the generated gas mixture is discharged from the high altitude through a chimney, and in addition, no sewage is discharged, and the environment-friendly condition is good.
Drawings
FIG. 1 is a schematic view showing the structure of a blast furnace slag processing facility according to the present invention.
Detailed Description
The following description sufficiently illustrates specific embodiments of the invention to enable those skilled in the art to practice and reproduce it.
As shown in FIG. 1, it is a schematic view showing the structure of a blast furnace slag treatment facility according to the present invention.
The blast furnace slag processing equipment structurally comprises: the device comprises a chimney 1, a sedimentation tank 2, a slag extraction tank 3, a water absorption well 4, a separator 5, a disc dehydrator 6, a mixing water pump 7 and a slag flushing water pump 8. The chimney 1 is installed at the top of the sedimentation tank 2, the slag extracting tank 3 is arranged at the side part of the sedimentation tank 2, and the water suction well 4 is arranged at the side part of the slag extracting tank 3. The slag extracting tank 3 is provided with an exhaust port.
A slag chute 21 and a punching box 22 are arranged on the left side wall of the sedimentation tank 2, the punching box 22 is positioned at the lower part of the slag chute 21, and the punching box 22 is connected with a slag flushing water pump 8 through a pipeline; the sedimentation tank 2 is separated from the slag extracting tank 3 through a first partition wall 24, the sedimentation tank 2 is communicated with the slag extracting tank 3 through a gap at the bottom of the first partition wall 24, a first through hole 25 is formed in the upper part of the first partition wall 24, and the upper part of the slag extracting tank 3 is communicated with the sedimentation tank 2 through the first through hole 25; the first partition wall 24 is also provided with a water return port 26, and the water return port 26 is connected with a water return tank 61 through a pipeline; the interior of the sedimentation tank 2 is provided with a grate 23, the bottom of the grate 23 is provided with a bubbling device 27, the bubbling device 27 is connected with a compressed air tank or an air compressor through a pipeline, and the grate 23 is positioned at the lower parts of the slag chute 21 and the punching box 22. One end of the grate 23 is connected with a slag conveyor 28, and the slag conveyor 28 periodically removes water slag accumulated on the grate 23.
The slag extracting pool 3 and the suction well 4 are separated by a second partition wall 35, the second partition wall 35 is provided with a second through hole 36, and the upper part of the slag extracting pool 3 is communicated with the suction well 4 through the second through hole 36; the slag extracting pool 3 is internally provided with a longitudinally-arranged stirring water mixing pipeline 31, a slag extracting pipeline 32 and a compressed air pipeline 33, the bottom of the slag extracting pipeline 32 is connected with a pneumatic elevator 34, the top of the slag extracting pipeline 32 is connected with the separator 5 through a pipeline, and the pneumatic elevator 34 lifts the mixture of water slag and water to the separator 5 for slag-water separation; the top of the compressed air pipeline 33 is connected with a compressed air tank or an air compressor through a pipeline, and the air is used for mixing the grain slag and the water, so that the pneumatic elevator 34 is favorable for lifting the mixture of the grain slag and the water; the upper part of the water stirring and mixing pipeline 31 is connected with a water stirring and mixing pump 7 through a pipeline, and the water stirring and mixing pump 7 utilizes the clear water in the suction well 4 to wash the water slag. The bottoms of the first through hole 25 and the second through hole 36 are positioned on the same plane, so that the clarified water can enter the slag extracting tank 3 and the water suction well 4 from the sedimentation tank 2.
the bottom surfaces of the sedimentation tank 2 and the slag extracting tank 3 are inclined planes, and the joint of the two bottom surfaces is positioned at the bottom of the mixing water pipeline 31, the slag extracting pipeline 32 and the compressed air pipeline 33, so that air and water can be favorably used for washing the mixed water slag.
The outer side wall of the lower part of the suction well 4 is provided with a water inlet 41 of a mixing water pump and a water inlet 42 of a flushing water pump, and the water inlet 41 of the mixing water pump is positioned at the upper part of the water inlet 42 of the flushing water pump. The inlet of the mixing water pump 7 is connected with the water inlet 41 of the mixing water pump, and the outlet is connected with the mixing water pipeline 31 through a pipeline; the inlet of the flushing slag water pump 8 is connected with the water inlet 42 of the flushing slag water pump, and the outlet of the flushing slag water pump 8 is connected with the flushing box 22 through a pipeline.
The lower part of the separator 5 is connected with the top of the slag extracting pipeline 32 through a pipeline, the exhaust port on the side part is connected with the chimney 1 through a pipeline, water vapor is discharged through the chimney 1, the slag discharging port on the side part is connected with the feed inlet of the disc dehydrator 6 through an overflow pipe 51, and water slag and water are fed into the disc dehydrator 6.
An exhaust port of the disc dehydrator 6 is connected with the chimney 1 through a pipeline, a water return groove 61 for collecting slag water is arranged at the bottom of a rotating disc of the disc dehydrator 6, a slag bin is arranged at the lower part of a slag outlet at the bottom of the disc dehydrator 6, and a belt conveyor 62 is arranged at the lower part of the slag bin. The disk dehydrator 6 separates the water residue from the water by centrifugal force generated by rotation, and the separated water enters the water returning tank 61 and is conveyed to the water returning port 26 through a pipeline. The separated water slag enters a water slag bin and is sent out through a belt conveyor 62. The rotating disc is divided into 16 grids, a replaceable slag box with a filter screen at the lower part is arranged in each grid, the rotating speed of the rotating disc is adjusted according to the filling degree of the slag box, a door is arranged at the bottom of each grid, the door is opened when rotating to a slag discharging position, water slag enters a water slag bin, and then the water slag is conveyed to a slag yard through a belt conveyor 62.
The slag treatment method specifically comprises the following steps:
Step 1: the slag-water mixture and the steam enter the sedimentation tank 2 filled with water through the slag chute 21, the steam is diffused into the atmosphere along the chimney 1, the slag-water mixture passes through the grate 23 and enters the lower part of the sedimentation tank 2, and the slag-water mixture enters the bottom of the slag extracting tank 3 through a gap at the bottom of the first partition wall 24;
The slag flows out from the nozzle, is quenched by high-pressure water flow sprayed by a granulating water nozzle positioned below the nozzle and is flushed to a launching screen for crushing, then a slag-water mixture (water slag and water) and steam enter a sedimentation tank 2 filled with water through a slag chute 21, and the generated steam is diffused to the atmosphere along a chimney 1.
The slag-water mixture falls onto the grate 23, and the water slag with large particle size is separated by the grate 23 and discharged through the slag conveyor 28. The water in the sedimentation tank 2 is kept at the same level with the slag extracting tank 3 and the suction well 4 through the first through hole 25 and the second through hole 36.
The flushing water pump 8 sends the water and the water granulated slag accumulated at the bottom of the water absorption well 4 to the flushing box 22, the flushing box 22 flushes the water granulated slag on the grate 23 by the water and the water granulated slag accumulated at the bottom of the water absorption well 4, the bubbling device 27 turns the water granulated slag on the grate 23 by compressed air to prevent the water granulated slag on the grate 23 from being excessively accumulated, and the slag scooper 28 discharges the water granulated slag accumulated on the grate 23 out of the sedimentation tank 2.
Step 2: clear water in the water absorption well 4 is pumped by the mixing water pump 7 to wash water slag at the lower part of the slag extracting pool 3 through a mixing water pipeline 31, compressed air is used for mixing the water slag and the water through a compressed air pipeline 33, and a slag-water mixture is lifted to the separator 5 through a slag extracting pipeline 32 by a pneumatic lifter 34;
The water granulated slag is fully mixed by air and water, so that the slag-water mixture is favorable for carrying more water granulated slag, and the water granulated slag is prevented from being accumulated at the lower part of the slag extracting pool 3.
And step 3: the separator 5 carries out steam-water separation on the slag-water mixture, separated gas and steam are sent into the chimney 1 to be discharged, and water slag and water are sent into the disc dehydrator 6 to be dehydrated;
And 4, step 4: the disc dehydrator 6 separates the water slag from the water through rotation, the water is sent into a water return groove 61, the water return groove 61 returns the water to the water return port 26, and the water enters the sedimentation tank 2; the separated water slag enters a water slag bin and is sent out through a belt conveyor 62.
The disc dehydrator 6 sends the water vapor to the chimney 1 for discharging.
It will be understood that the foregoing description is by way of example and explanatory only and is not intended to limit the invention, which is not limited to the structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.
Claims (7)
1. A blast furnace slag processing apparatus, comprising: a chimney, a sedimentation tank, a slag extraction tank, a water absorption well, a separator, a disc dehydrator, a mixing water pump and a slag flushing water pump; the chimney is arranged at the top of the sedimentation tank, the slag extracting tank is arranged at the side part of the sedimentation tank, the water suction well is arranged at the side part of the slag extracting tank, and the sedimentation tank is provided with an exhaust port; a slag chute and a punching box are arranged on the left side wall of the sedimentation tank, the punching box is positioned at the lower part of the slag chute, and the punching box is connected with a slag flushing water pump through a pipeline; the sedimentation tank is separated from the slag extracting tank through a first partition wall, a gap is reserved at the bottom of the first partition wall, and a first through hole is formed in the upper part of the first partition wall; a water return port is formed in the first partition wall and is connected with a water return tank through a pipeline; a grate is arranged in the sedimentation tank and is positioned at the lower parts of the slag chute and the punching box; one end of the grate is connected with a slag conveyor; the slag extracting pool and the suction well are separated by a second partition wall, and the second partition wall is provided with a second through hole; a mixed water stirring pipeline, a slag extracting pipeline and a compressed air pipeline are arranged in the slag extracting pool, the bottom of the slag extracting pipeline is connected with a pneumatic elevator, and the top of the slag extracting pipeline is connected with a separator through a pipeline; the top of the compressed air pipeline is connected with a compressed air tank or an air compressor through a pipeline; the side wall of the lower part of the water suction well is provided with a water inlet of a mixing water pump and a water inlet of a slag flushing water pump, and the water inlet of the mixing water pump is positioned at the upper part of the water inlet of the slag flushing water pump; the inlet of the mixing water pump is connected with the water inlet of the mixing water pump, and the outlet of the mixing water pump is connected with a mixing water pipeline through a pipeline; the inlet of the slag flushing water pump is connected with the water inlet of the slag flushing water pump, and the outlet of the slag flushing water pump is connected with the flushing box through a pipeline; the slag discharge port on the side part of the separator is connected with the feed inlet of the disc dehydrator through an overflow pipe.
2. The blast furnace slag processing apparatus according to claim 1, wherein a bubbling device is provided at the bottom of the grate, and the bubbling device is connected to a compressed air tank or an air compressor through a pipeline.
3. The blast furnace slag processing apparatus according to claim 1, wherein the bottoms of the first through hole and the second through hole are located on the same plane.
4. the blast furnace slag processing apparatus according to claim 1, wherein the bottom surfaces of the settling tank and the slag extracting tank are inclined surfaces, and the joint of the two bottom surfaces is located at the bottom of the water mixing and stirring pipe, the slag extracting pipe and the compressed air pipe.
5. The blast furnace slag treatment facility according to claim 1, wherein the exhaust port of the side portion of the separator is connected to a chimney through a pipe, and the exhaust port of the disc dehydrator is connected to the chimney through a pipe.
6. The blast furnace slag treatment facility according to claim 1, wherein a water return tank is provided at the bottom of the rotary disk of the disk dehydrator, a slag bin is provided at the lower portion of a bottom slag outlet of the disk dehydrator, and a belt conveyor is provided at the lower portion of the slag bin.
7. The blast furnace slag processing apparatus according to claim 6, wherein the rotary disk is divided into cells, each cell is provided with a slag box having a strainer therein, a door is provided at a bottom of each cell, and the granulated slag container is provided with a door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821983011.6U CN209778910U (en) | 2018-11-28 | 2018-11-28 | Blast furnace slag treatment equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821983011.6U CN209778910U (en) | 2018-11-28 | 2018-11-28 | Blast furnace slag treatment equipment |
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| CN209778910U true CN209778910U (en) | 2019-12-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109321696A (en) * | 2018-11-28 | 2019-02-12 | 包头钢铁（集团）有限责任公司 | Blast furnace slag treatment device and its treatment of slag |
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2018
- 2018-11-28 CN CN201821983011.6U patent/CN209778910U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109321696A (en) * | 2018-11-28 | 2019-02-12 | 包头钢铁（集团）有限责任公司 | Blast furnace slag treatment device and its treatment of slag |
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