CN214193316U - Liquid blast furnace slag dry-type granulation treatment device - Google Patents
Liquid blast furnace slag dry-type granulation treatment device Download PDFInfo
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- CN214193316U CN214193316U CN202023224548.4U CN202023224548U CN214193316U CN 214193316 U CN214193316 U CN 214193316U CN 202023224548 U CN202023224548 U CN 202023224548U CN 214193316 U CN214193316 U CN 214193316U
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model discloses a liquid blast furnace slag dry-type granulation treatment device, which comprises a spiral granulator, wherein the spiral granulator comprises a water-cooled wall, the water-cooled wall is enclosed into a cylindrical cavity, a water-cooled shaft is arranged in the cavity, a spiral blade is arranged on the water-cooled shaft, and a cooling water feed pipe and a cooling water discharge pipe are respectively arranged at two ends of the water-cooled wall; the upper side of one end of the spiral granulator is provided with a liquid slag control bag and a steel ball bin, the liquid slag control bag sends high-temperature liquid blast furnace slag into the spiral granulator, the steel ball bin sends slag cooling steel balls into the spiral granulator, and the slag cooling steel balls and a water-cooled wall jointly cool the high-temperature liquid blast furnace slag. The device adopts a double cooling mode of cooling the slag cooling steel balls and cooling the water wall to carry out sharp quenching on the liquid blast furnace slag, thereby economically and feasibly obtaining the dry-type granulated blast furnace slag with high temperature, solid state and high vitreous phase content.
Description
Technical Field
The utility model belongs to the field of waste heat recovery and utilization in the steel industry, and provides a liquid blast furnace slag dry-type granulation treatment device.
Background
The tapping temperature of the blast furnace slag is about 1500 ℃, the sensible heat of each ton of slag is about 1800MJ, and the blast furnace slag belongs to high-quality waste heat resources from the temperature perspective. The main chemical components of the blast furnace slag are CaO and SiO2MgO and Al2O3The blast furnace slag accounts for more than 95 percent of the total amount, and belongs to high-quality cement resources from the component viewpoint. At the present stage, blast furnace slag is generally prepared into vitreous phase granulated water slag with cement activity by a water quenching method and then processed into a cement admixture. The water quenching method has the disadvantages of large consumption of new water, environmental pollution caused by sulfide gas generation and no recovery of sensible heat of blast furnace slag.
In order to recover the sensible heat of the blast furnace slag and not reduce the cementing utilization value of the blast furnace slag, the research on the dry type blast furnace slag granulation technology has been developed at home and abroad for decades, and various dry type blast furnace slag granulation technologies such as a wind quenching granulation method, a centrifugal granulation method, a roller cooling granulation method, a medium-doped cooling granulation method and the like are formed. However, the existing dry granulation technology for blast furnace slag is not industrially applied at present due to the limitation of the economic feasibility of investment and operation processes.
The blast furnace slag dry type granulation and waste heat recovery technology has two technical problems of economically and feasibly preparing the granulated blast furnace slag with high glass phase content and efficiently recovering the sensible heat of the blast furnace slag.
SUMMERY OF THE UTILITY MODEL
In the face of the problem that liquid blast furnace slag is difficult to economically realize dry granulation sensible heat recovery, the utility model provides a liquid blast furnace slag dry granulation treatment device, which economically prepares dry granulation blast furnace slag by adopting a slag cooling steel ball and water wall dual cooling technology.
The utility model discloses a realize through following technical scheme:
a liquid blast furnace slag dry-type granulation treatment device comprises a spiral granulator, wherein the spiral granulator comprises a water-cooled wall, the water-cooled wall is surrounded into a cylindrical cavity, a water-cooled shaft is arranged in the cavity, spiral blades are arranged on the water-cooled shaft, and a cooling water feeding pipe and a cooling water discharging pipe are respectively arranged at two ends of the water-cooled wall; the upper side of one end of the spiral granulator is provided with a liquid slag control bag and a steel ball bin, the liquid slag control bag sends high-temperature liquid blast furnace slag into the spiral granulator, the steel ball bin sends slag cooling steel balls into the spiral granulator, and the slag cooling steel balls and a water-cooled wall jointly cool the high-temperature liquid blast furnace slag.
Further, the liquid slag control bag and the steel ball bin are connected with the spiral granulator through a first chute, and the slag cooling steel balls and the high-temperature liquid blast furnace slag are mixed in the first chute and then enter the spiral granulator.
Furthermore, two ends of the water-cooling shaft are respectively connected with a cooling water feeding pipe and a cooling water discharging pipe.
Further, the spiral granulator is sequentially connected with the grate cooler, the ball mill, the magnetic separator and the cold slag storage bin; the ball mill is connected with the grate cooler through a second chute, the magnetic separator is connected with the ball mill through a third chute, and the cold slag storage bin is connected with the magnetic separator through a belt conveyor.
Further, set up magnet separator blast furnace slag entry, magnet separator steel ball export and magnet separator blast furnace slag export on the magnet separator respectively, magnet separator blast furnace slag entry links to each other with the ball mill through the third chute, magnet separator blast furnace slag export links to each other with cold sediment storage storehouse through the belt feeder, magnet separator steel ball export links to each other with the steel ball storehouse through the lifting machine.
Furthermore, the two ends of the grate cooler are respectively provided with a grate cooler inlet and a grate cooler outlet, and a high-temperature section grate bed and a low-temperature section grate bed are sequentially arranged in the grate cooler from the inlet to the outlet.
Furthermore, the high-temperature section grate bed and the low-temperature section grate bed are driven by hydraulic cylinders, a circulating fan is arranged on the lower side of the high-temperature section grate bed to provide cooling air, a high-temperature section exhaust pipe is arranged on the upper side of the high-temperature section grate bed, an air blower is arranged on the lower side of the low-temperature section grate bed to provide cooling air, and a low-temperature section exhaust pipe is arranged on the upper side of the low-temperature section grate bed.
Furthermore, the system also comprises a waste heat boiler, wherein the cooling water drainage pipe is connected with the waste heat boiler, and the high-temperature section exhaust pipe is connected with the waste heat boiler.
Further, the diameter of the slag cooling steel ball is 15-25mm, a ball mill steel ball is arranged in the ball mill, and the diameter of the ball mill steel ball is 80-100 mm.
The utility model has the advantages that:
the utility model provides a liquid blast furnace slag dry-type granulation treatment device, which adopts a dual cooling mode of cooling by a slag cooling steel ball and cooling by a water wall to carry out sharp quenching on liquid blast furnace slag, thereby economically and feasibly obtaining the dry-type granulation blast furnace slag with high temperature, solid state and high vitreous phase content; the grate cooler is adopted to cool the high-temperature dry-type granulated blast furnace slag, and the sensible heat of the blast furnace slag is efficiently recovered; the device realizes the sensible heat recovery of the blast furnace slag and simultaneously does not reduce the cementing utilization value of the blast furnace slag.
Drawings
Fig. 1 is a schematic structural view of the present invention;
wherein: 1. a spiral granulator; 1-1, liquid slag control bag; 1-2, a steel ball bin; 1-3, a first chute; 1-4, water cooling wall; 1-5, water-cooling shaft; 1-6, helical blades; 1-7, a cooling water supply pipe; 1-8, a cooling water discharge pipe; 1-9, a lifter;
2. a grate cooler; 2-1, circulating fans; 2-2, a blower; 2-3, exhausting the high-temperature section; 2-4, a low-temperature section exhaust pipe;
3. a ball mill; 3-1, a second chute;
4. a magnetic separator; 4-1, a third chute;
5. cold slag storage; 5-1, a belt conveyor;
6. provided is a waste heat boiler.
Detailed Description
The following describes the embodiments of the present invention with reference to the accompanying drawings.
As shown in figure 1, the liquid blast furnace slag dry-type granulation treatment device comprises a spiral granulator 1, a grate cooler 2, a ball mill 3, a magnetic separator 4, a cold slag storage bin 5 and a waste heat boiler 6.
The spiral granulator 1 comprises a liquid slag control bag 1-1, a steel ball bin 1-2, a first chute 1-3, a water cooling wall 1-4, a water cooling shaft 1-5, spiral blades 1-6, a cooling water feeding pipe 1-7, a cooling water discharging pipe 1-8 and a lifter 1-9.
The water-cooled wall 1-4 is enclosed into a cylindrical cavity of the spiral granulator 1, and two ends of the water-cooled wall 1-4 are respectively provided with a cooling water feed pipe 1-7 and a cooling water discharge pipe 1-8 to provide cooling water for heat exchange between the water-cooled wall 1-4 and blast furnace slag; the water-cooling shaft 1-5 is arranged in the cavity, the water-cooling shaft 1-5 is driven by a variable frequency motor, the helical blades 1-6 are welded on the water-cooling shaft 1-5, and two ends of the water-cooling shaft 1-5 are respectively communicated with a cooling water supply pipe 1-7 and a cooling water discharge pipe 1-8; the upper side of one end of the spiral granulator 1 is provided with a blast furnace slag inlet, and the lower side of the other end of the spiral granulator is provided with a blast furnace slag outlet.
The liquid slag control bag 1-1 and the steel ball bin 1-2 are arranged at the upper side of one end of the spiral granulator 1 and are connected with a blast furnace slag inlet of the spiral granulator 1 through a first chute 1-3, and the steel ball bin 1-2 is internally provided with a slag cooling steel ball which is recycled in a system and used for cooling high-temperature slag, wherein the diameter of the slag cooling steel ball is 15-25 mm; the blast furnace slag outlet of the spiral granulator 1 is connected with the grate cooler 2; and cooling water discharge pipes 1-8 are connected with a waste heat boiler 6, and a hoister 1-9 is connected with the steel ball bin 1-2 and a magnetic separator steel ball outlet of the magnetic separator 4.
The grate cooler 2 is arranged behind the spiral granulator 1, the two ends of the grate cooler 2 are respectively provided with a grate cooler inlet and a grate cooler outlet, a high-temperature section grate bed and a low-temperature section grate bed are sequentially arranged in the grate cooler 2 from the inlet to the outlet, the high-temperature section grate bed and the low-temperature section grate bed are both driven by hydraulic cylinders, a circulating fan 2-1 is arranged at the lower side of the high-temperature section grate bed to provide cooling air, a high-temperature section exhaust pipe 2-3 is arranged at the upper side of the high-temperature section grate bed, the high-temperature section exhaust pipe 2-3 is connected with a waste heat boiler 6, an air blower 2-2 is arranged at the lower side of the low-temperature section grate; the outlet of the grate cooler is sequentially provided with a ball mill 3, a magnetic separator 4 and a cold slag storage bin 5.
The waste heat boiler 6 is arranged beside the grate cooler 2.
The ball mill 3 is arranged at the rear side of the grate cooler 2 and is connected with the grate cooler outlet of the grate cooler 2 through a second chute 3-1, and a ball mill blast furnace slag inlet and a ball mill blast furnace slag outlet are respectively arranged at two sides of the ball mill 3. The ball mill 3 is internally provided with ball mill steel balls with the grain size of 80-100mm, and blast furnace slag attachments on the surfaces of the slag cooling steel balls in the blast furnace slag are ground in the ball milling process, so that the blast furnace slag and the slag cooling steel balls are conveniently separated.
The magnetic separator 4 is arranged on the rear side of the ball mill 3, a magnetic separator blast furnace slag inlet, a magnetic separator steel ball outlet and a magnetic separator blast furnace slag outlet are respectively arranged on the magnetic separator 4, the magnetic separator blast furnace slag inlet is connected with the ball mill blast furnace slag outlet through a third chute 4-1, and the magnetic separator blast furnace slag outlet is connected with the cold slag storage bin 5 through a belt conveyor 5-1; the steel ball outlet of the magnetic separator is connected with the steel ball bin 1-2 through a hoisting machine 1-9.
The working process of the liquid blast furnace slag dry-type granulation treatment device is as follows:
the liquid slag control bag 1-1 is used for controlling the flow of liquid blast furnace slag and sending the liquid blast furnace slag into the first chute 1-3, the slag cooling steel ball is added at the steel ball outlet of the magnetic separator 4 and sent into the steel ball bin 1-2 of the spiral granulator 1 by the elevator 1-9, the steel ball bin 1-2 controls the slag cooling steel ball and sends the slag cooling steel ball into the first chute 1-3 according to a specific proportion (the mass ratio of the slag cooling steel ball to the blast furnace slag) to be mixed with the high-temperature liquid blast furnace slag, and the mixed liquid blast furnace slag and the slag cooling steel ball are sent into the spiral granulator 1 together by the first chute 1-3.
In the spiral granulator 1, cooling water supply pipes 1-7 and cooling water discharge pipes 1-8 are opened, the cooling water supply pipes 1-7 provide cooling water for water cooling walls 1-4 and water cooling shafts 1-5, meanwhile, a motor drives the water cooling shafts 1-5 to rotate, the water cooling shafts 1-5 rotate to drive spiral blades 1-6 to rotate, the cooling water discharge water is deoxidized and then sent to a waste heat boiler 6 to serve as the water supply of the waste heat boiler 6, liquid blast furnace slag is cooled by slag cooling steel balls and the water cooling walls in a cavity of the spiral granulator 1 and is quenched to form high-temperature solid vitreous phase slag particles with the temperature of 700-800 ℃, and the slag particles are stirred and conveyed by the spiral blades 1-6 to form most dry-type granulated high furnace slag with the particle size of 5-30mm and then sent to a grate cooler 2 to be cooled.
The high-temperature section grate bed and the low-temperature section grate bed of the grate cooler 2 are driven by a hydraulic cylinder, a blast furnace slag layer on the grate bed moves along with the high-temperature section grate bed and the low-temperature section grate bed and is conveyed from an inlet of the grate cooler to an outlet of the grate cooler, the thickness of the blast furnace slag layer is controlled to be 0.8-1.2m, the high-temperature section grate bed is cooled by air supplied by a circulating fan 2-1, and the low-temperature section grate bed is cooled by air supplied by an air blower 2-2. The blast furnace slag layer and the cooling air are subjected to vertical heat exchange, hot waste gas passing through the blast furnace slag layer after heat exchange is discharged from a high-temperature section exhaust pipe 2-3 at the upper side of the high-temperature section grate bed and a low-temperature section exhaust pipe 2-4 at the upper side of the low-temperature section grate bed respectively, the hot waste gas at the temperature of 400-DEG C and 500-DEG C discharged from the high-temperature section exhaust pipe 2-3 is sent to a waste heat boiler 6 for utilization, and the hot waste gas at the temperature of 140-DEG C and 160-DEG C discharged from the low-temperature section exhaust pipe 2-4 is discharged to the atmosphere after dust removal. The temperature of the granulated blast furnace slag after being cooled by the grate cooler 2 is 150 ℃, and then the granulated blast furnace slag is sent into the ball mill 3 for ball milling through a second chute 3-1 from a blast furnace slag outlet of the grate cooler.
The ball milling process of the ball mill 3 grinds away the blast furnace slag attachments on the surfaces of the slag cooling steel balls in the granulated blast furnace slag, and then the mixture of the granulated blast furnace slag and the slag cooling steel balls is sent into the magnetic separator 4. In the magnetic separator 4, the blast furnace slag and the slag cooling steel balls are separated through magnetic force, the temperature of the separated slag cooling steel balls is 60-100 ℃, the slag cooling steel balls are sent into a steel ball bin 1-2 of the spiral granulator 1 through a lifter 1-9 for recycling, and the separated granulated blast furnace slag is sent into a cold slag storage bin 5 through a belt conveyor 5-1.
Finally, it should be noted that: although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications, equivalents, improvements and the like can be made in the technical solutions of the foregoing embodiments or in some technical features of the foregoing embodiments, but all modifications, equivalents, improvements and the like within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (9)
1. The liquid blast furnace slag dry-type granulation treatment device is characterized by comprising a spiral granulator (1), wherein the spiral granulator (1) comprises water cooling walls (1-4), the water cooling walls (1-4) enclose a cylindrical cavity, a water cooling shaft (1-5) is installed in the cavity, spiral blades (1-6) are installed on the water cooling shaft (1-5), and two ends of each water cooling wall (1-4) are respectively provided with a cooling water supply pipe (1-7) and a cooling water discharge pipe (1-8); the upper side of one end of the spiral granulator (1) is provided with a liquid slag control bag (1-1) and a steel ball bin (1-2), the liquid slag control bag (1-1) feeds high-temperature liquid blast furnace slag into the spiral granulator (1), the steel ball bin (1-2) feeds slag cooling steel balls into the spiral granulator (1), and the slag cooling steel balls and the water cooling wall (1-4) jointly cool the high-temperature liquid blast furnace slag.
2. The liquid blast furnace slag dry granulation treatment device as claimed in claim 1, wherein the liquid slag control bag (1-1) and the steel ball bin (1-2) are connected with the spiral granulator (1) through a first chute (1-3), and the slag cooling steel balls and the high-temperature liquid blast furnace slag enter the spiral granulator (1) after being mixed in the first chute (1-3).
3. The liquid blast furnace slag dry-type granulation treatment apparatus as claimed in claim 1, wherein both ends of said water-cooled shaft (1-5) are connected to a cooling water feed pipe (1-7) and a cooling water discharge pipe (1-8), respectively.
4. The liquid blast furnace slag dry-type granulation treatment device as claimed in claim 1, wherein the spiral granulator (1) is connected with the grate cooler (2), the ball mill (3), the magnetic separator (4) and the cold slag storage bin (5) in sequence; the ball mill (3) is connected with the grate cooler (2) through a second chute (3-1), the magnetic separator (4) is connected with the ball mill (3) through a third chute (4-1), and the cold slag storage bin (5) is connected with the magnetic separator (4) through a belt conveyor (5-1).
5. The liquid blast furnace slag dry-type granulation treatment device as claimed in claim 4, wherein the magnetic separator (4) is provided with a magnetic separator blast furnace slag inlet, a magnetic separator steel ball outlet and a magnetic separator blast furnace slag outlet respectively, the magnetic separator blast furnace slag inlet is connected with the ball mill (3) through a third chute (4-1), the magnetic separator blast furnace slag outlet is connected with the cold slag storage bin (5) through a belt conveyor (5-1), and the magnetic separator steel ball outlet is connected with the steel ball bin (1-2) through a hoisting machine (1-9).
6. The liquid blast furnace slag dry-type granulation treatment device as claimed in claim 4, wherein the grate cooler (2) is provided with a grate cooler inlet and a grate cooler outlet at both ends thereof, and the grate bed at the high temperature section and the grate bed at the low temperature section are sequentially arranged in the grate cooler (2) from the inlet to the outlet.
7. The liquid blast furnace slag dry-type granulation treatment device as defined in claim 6, wherein the high-temperature section grate bed and the low-temperature section grate bed are driven by hydraulic cylinders, a circulating fan (2-1) is arranged at the lower side of the high-temperature section grate bed to provide cooling air, a high-temperature section exhaust pipe (2-3) is arranged at the upper side of the high-temperature section grate bed, an air blower (2-2) is arranged at the lower side of the low-temperature section grate bed to provide cooling air, and a low-temperature section exhaust pipe (2-4) is arranged at the upper side of.
8. The liquid blast furnace slag dry granulation treatment device as claimed in claim 7, further comprising a waste heat boiler (6), wherein the cooling water discharge pipes (1-8) are connected to the waste heat boiler (6), and the high temperature stage exhaust pipes (2-3) are connected to the waste heat boiler (6).
9. The liquid blast furnace slag dry-type granulation treatment device as claimed in claim 4, wherein the diameter of the slag cooling steel balls is 15-25mm, the ball mill (3) is internally provided with ball mill steel balls, and the diameter of the ball mill steel balls is 80-100 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023224548.4U CN214193316U (en) | 2020-12-28 | 2020-12-28 | Liquid blast furnace slag dry-type granulation treatment device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023224548.4U CN214193316U (en) | 2020-12-28 | 2020-12-28 | Liquid blast furnace slag dry-type granulation treatment device |
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| CN214193316U true CN214193316U (en) | 2021-09-14 |
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| CN202023224548.4U Active CN214193316U (en) | 2020-12-28 | 2020-12-28 | Liquid blast furnace slag dry-type granulation treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115254350A (en) * | 2022-07-07 | 2022-11-01 | 北京科技大学 | Device and method for cooling hot aluminum slag |
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2020
- 2020-12-28 CN CN202023224548.4U patent/CN214193316U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115254350A (en) * | 2022-07-07 | 2022-11-01 | 北京科技大学 | Device and method for cooling hot aluminum slag |
| CN115254350B (en) * | 2022-07-07 | 2023-11-10 | 北京科技大学 | Thermal aluminum slag cooling device and method |
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