CN112342326B - High-efficiency treatment system and treatment process for high-temperature steel slag - Google Patents
High-efficiency treatment system and treatment process for high-temperature steel slag Download PDFInfo
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- CN112342326B CN112342326B CN202010999986.3A CN202010999986A CN112342326B CN 112342326 B CN112342326 B CN 112342326B CN 202010999986 A CN202010999986 A CN 202010999986A CN 112342326 B CN112342326 B CN 112342326B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid slag
- C21B3/08—Cooling slag
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
- C21B2400/022—Methods of cooling or quenching molten slag
- C21B2400/024—Methods of cooling or quenching molten slag with the direct use of steam or liquid coolants, e.g. water
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/05—Apparatus features
- C21B2400/062—Jet nozzles or pressurised fluids for cooling, fragmenting or atomising slag
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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
Abstract
A high-efficient processing system of high temperature attitude slag which characterized in that: including slag pretreatment systems, slag granulation system and cooling water circulation system, slag pretreatment systems installs the slag groove including the workstation on, the workstation, and the enclosure is installed to the periphery of slag groove, and fixed dust excluding hood is installed to the one end on enclosure upper portion, and the slag import has been seted up to the other end on enclosure upper portion, corresponds to the position of slag import, installs horizontal track on the workstation, and the cooperation is installed on the horizontal track can follow the removal dust excluding hood that it removed, remove the dust excluding hood and can seal the slag import completely, still be equipped with vertical track in the both sides in slag groove. A set of complete steel slag treatment technology is obtained, continuous production can be realized, and the treatment efficiency is high; the method is safe, environment-friendly and reliable in operation; the method is suitable for the steel slag with various properties, and the granulating effect of the steel slag is good; the automation degree is high, and the process control is accurate.
Description
Technical Field
The invention relates to the technical field of steel slag treatment, in particular to a high-efficiency treatment system and a treatment process for high-temperature steel slag.
Background
The steel slag is a byproduct in the steel-making process, contains various silicates, free CaO, FeO, other various alkaline oxides and acidic oxides, carries a small amount of molten steel and the like, and can be reused as raw materials such as building materials, soil conditioners and the like; however, after the steel making, the steel slag is in a high-temperature molten state and needs to be crushed and cooled before being used.
After slag discharge and transportation of steel slag generated in the steel making process, the temperature is generally 700-1400 ℃, the temperature fluctuation range is large, and the physical form is generally liquid, solid-liquid two-phase state and high-temperature solid state. The complex physical state and chemical composition results in great difficulty and hidden safety trouble in steel slag treatment and high requirement on the reliability, stability, safety and other features of the process and equipment.
At present, steel slag generated in the steel making process is generally subjected to closed hot-stuffy treatment by various steel enterprises, and the following problems are still difficult to solve after the technology is widely applied for many years: the existing treatment method has long treatment period and low production efficiency, and because the temperature of the steel slag is high, potential safety hazards exist in the slag disintegrating process or the granulating effect is poor after the hot disintegrating treatment if the production operation is improper; the steel slag which is treated at present directly falls into a slag field through a conveyor, and then is transported through a forklift and a truck, so that the environment is easily polluted in the transporting process, and the whole environment cannot be effectively improved.
Disclosure of Invention
In order to solve the above problems, the present invention provides a high-efficiency treatment system and a treatment process for high-temperature steel slag, so as to solve the problems encountered in the conventional steel slag treatment process.
The technical scheme adopted by the invention for solving the technical problems is as follows: a high-efficient processing system of high temperature attitude slag which characterized in that: the steel slag pre-treatment system comprises a steel slag pre-treatment system, a steel slag granulating system and a cooling water circulation system, wherein the steel slag pre-treatment system comprises a workbench, a steel slag groove is arranged on the workbench, a closed cover is arranged at the periphery of the steel slag groove, one end of the upper part of the closed cover is provided with a fixed dust hood, the other end of the upper part of the closed cover is provided with a steel slag inlet, a transverse rail is arranged on the workbench and is matched with a movable dust hood capable of moving along the transverse rail, the movable dust hood can completely seal the steel slag inlet, two sides of the steel slag groove are also provided with longitudinal rails, the longitudinal rails are matched with a trolley capable of moving along the longitudinal rails, a slag raking machine is arranged on the trolley and is positioned in the steel slag groove, a blanking port is arranged at the bottom of the steel slag groove corresponding to the position of the fixed dust hood, and a roller crusher is arranged at the bottom of the blanking port, the steel slag granulating system is positioned at the bottom of the workbench and comprises a steel slag granulating machine, wherein the steel slag granulating machine comprises a roller, two sides of the roller are respectively provided with a bracket, the bracket at one side is provided with a driving motor coaxially connected with the roller, the bracket at the other side is provided with a water-cooling hollow shaft communicated with the inside of the roller, the inner wall of the roller is provided with a lining plate, a crushing medium is arranged in the roller, the periphery of the roller close to one end of the driving motor is also provided with an aggregate cover communicated with the aggregate cover, the upper end of the aggregate cover is provided with an exhaust port, the bottom of the aggregate cover is provided with a discharge port, the bottom of the discharge port is provided with a conveying device corresponding to the discharge port, a vertically arranged grate plate is also arranged between the aggregate cover and the roller, the bottom of the double-roller crusher is also provided with a transverse moving frame, the transverse moving frame is provided with a feeding chute, and a vibrating feeder is also arranged on the transverse moving frame corresponding to the feeding chute, the water-cooling hollow shaft is provided with a sealing cover in a matching way, one discharge end of the vibrating feeder extends into the water-cooling hollow shaft through the sealing cover, the cooling water circulating system comprises a water pool and a pump station, the pump station is communicated with the steel slag pretreatment system and the steel slag granulation system through pipelines, the periphery of the bottom of the workbench is also provided with a water return ditch, one end of the water return ditch is positioned at the bottom of the steel slag granulation system, and the other end of the water return ditch is communicated with the water pool;
the slag removing machine comprises a rotating shaft, a plurality of groups of slag removing teeth arranged along the length of the rotating shaft are arranged on the rotating shaft, each group of slag removing teeth comprises a sleeve sleeved on the rotating shaft, tooth handles are arranged on the periphery of the sleeve and are distributed in a circumferential manner, roller teeth are detachably arranged at the end part of each tooth handle through a bolt, and the rotating shaft can drive the slag removing teeth to rotate in a steel slag groove for removing slag;
the rotary shaft is a water-cooling rotary shaft, one end of the water-cooling rotary shaft is provided with a rotary joint, the rotary joint is provided with a water inlet, an axis water hole is formed in the water-cooling rotary shaft along the length direction of the water-cooling rotary shaft, one end of the axis water hole is communicated with the water inlet, the other end of the axis water hole is communicated with a water return groove, a plurality of water seams arranged along the circumferential direction of the water-cooling rotary shaft are formed in the water-cooling rotary shaft, one ends of the water seams are communicated with the water return groove, the other ends of the water seams are communicated with the annular water groove, water holes arranged in the circumferential direction are formed in the rotary joint, one ends of the water holes are communicated with the annular water groove, and the other ends of the water holes are provided with water outlets;
the double-roll crusher comprises an installation frame, a fixed roller and a sliding roller are installed in the installation frame, an overload protection device is arranged between the sliding roller and the installation frame, the overload protection device comprises an overload protection hydraulic cylinder, the overload protection hydraulic cylinder is fixed on the installation frame, two ends of the sliding roller are provided with a sliding bearing and a bearing seat, a guide groove matched with the bearing seat is formed in the installation frame, a piston rod of the overload protection hydraulic cylinder is fixedly installed on the bearing seat, and when the fixed roller and the sliding roller are overloaded under stress, the overload protection hydraulic cylinder can drive the sliding roller to be far away from the fixed roller;
the conveying equipment comprises a water filtering belt conveyor and a bucket elevator, one end of the water filtering belt conveyor is positioned at the bottom of the discharge port, the bucket elevator matched with the water filtering belt conveyor is installed at the other end of the water filtering belt conveyor, and a magnetic separation production line is further arranged at the upper part of the bucket elevator;
a first spray head is arranged at the bottom of the fixed dust hood, a second spray head is arranged in the water-cooling hollow shaft, and the first spray head and the second spray head are both communicated with a pump station of a cooling water circulation system through a water spray pipeline;
a high-efficiency treatment process for high-temperature steel slag is characterized by comprising the following steps: the method comprises the following steps:
firstly, steel slag pretreatment:
transferring and hoisting steel slag obtained by steel making to the side of a steel slag groove, opening a movable dust hood in a translation mode, moving a slag raking machine in the opposite direction, pouring the steel slag into the steel slag groove, and closing the movable dust hood; slag loosening, slag skimming and steel slag pushing are realized through walking of a slag skimming machine arranged in a steel slag groove and rotation of roller teeth;
continuously spraying water to the steel slag while loosening, skimming and pushing the steel slag, cooling and crushing the liquid steel slag to form high-temperature massive steel slag at the temperature of 600-800 ℃, conveying the high-temperature massive steel slag to a blanking port at one end of a steel slag groove body, falling into a roller crusher, and crushing the steel slag by a roller until the particle diameter is less than 20cm to obtain pretreated steel slag;
granulating the steel slag:
conveying the pretreated steel slag to a steel slag granulator by a vibrating feeder, directly contacting with a crushing medium in a roller of the steel slag granulator, crushing the steel slag to a diameter of less than 5mm by the rolling crushing medium in the continuous rotation process of the roller, continuously spraying water to cool the steel slag to below 100 ℃, and conveying the steel slag to a next procedure by conveying equipment.
The invention has the positive effects that: according to the high-efficiency treatment system and the treatment process for the high-temperature steel slag, a set of complete steel slag treatment technology is obtained through pretreatment of the steel slag and efficient granulation of the subsequent steel slag, continuous production can be realized, and the treatment efficiency is high; the method is safe, environment-friendly and reliable in operation; the method is suitable for the steel slag with various properties, and the granulating effect of the steel slag is good; the automation degree is high, and the process control is accurate.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a view in the direction A of FIG. 1;
FIG. 3 is a view from the direction B of FIG. 1;
FIG. 4 is a schematic structural view of a steel slag pretreatment system;
FIG. 5 is a view in the direction C of FIG. 4;
FIG. 6 is a view in the direction D of FIG. 5;
FIG. 7 is a schematic structural view of a steel slag granulation system;
FIG. 8 is a sectional view taken along line E-E in FIG. 7;
FIG. 9 is a top view of FIG. 7;
FIG. 10 is a mechanical schematic view of a rotary shaft of the crawler loader;
FIG. 11 is a schematic structural view of a water-cooled rotating shaft;
FIG. 12 is an enlarged view taken along line F-F of FIG. 11;
FIG. 13 is an enlarged view taken along line G-G of FIG. 11;
FIG. 14 is an enlarged view taken along line H-H in FIG. 11;
FIG. 15 is a schematic view of a roll crusher equipped with an overload protection device;
FIG. 16 is a block diagram of the treatment process of the present invention.
Detailed Description
The high-efficiency treatment system for the high-temperature steel slag comprises a steel slag pretreatment system, a steel slag granulation system and a cooling water circulation system, wherein the steel slag pretreatment system is used for pretreating the high-temperature steel slag with various physical forms, so that the physical form of the high-temperature steel slag is stable, the reliability of subsequent treatment is ensured, the steel slag granulation system is used for realizing rapid granulation treatment of the steel slag, and the cooling water circulation system is used for continuously spraying water for cooling the steel slag in the treatment process to form a complete steel slag treatment system.
As shown in fig. 4-6, the steel slag pretreatment system includes a workbench 1, a steel slag groove 10 is installed on the workbench 1, the steel slag groove 10 is used for containing steel slag to be treated, a closed hood 11 is installed on the periphery of the steel slag groove 10, a fixed dust hood 12 is installed at one end of the upper portion of the closed hood 11, a steel slag inlet 13 is opened at the other end of the upper portion of the closed hood 11, a transverse rail 14 is installed on the workbench 1 corresponding to the position of the steel slag inlet 13, a movable dust hood 15 capable of moving along the transverse rail 14 is installed on the transverse rail 14 in a matching manner, and the movable dust hood 15 can completely seal the steel slag inlet 13. The steel slag groove 10, the closed cover 11, the fixed dust hood 12 and the movable dust hood 15 form a totally-closed steel slag pretreatment chamber which is used as a pretreatment container of steel slag, and the movable dust hood 15 can be moved away or put in place according to production requirements.
The two sides of the steel slag groove 10 are also provided with longitudinal rails 16, the longitudinal rails 16 are cooperatively provided with trolleys 17 capable of moving along the longitudinal rails, each trolley 17 is provided with a slag raking machine 18, each slag raking machine 18 is positioned in the steel slag groove 10 and corresponds to the position of the fixed dust hood 12, the bottom of the steel slag groove 10 is provided with a blanking port 19, the bottom of each blanking port 19 is provided with a pair roller crusher 2, steel slag in the steel slag groove 10 can enter the pair roller crusher 2 through the blanking port 19 after being processed by the slag raking machine 18, and then can enter a steel slag granulating system to carry out granulation treatment after being crushed by the pair roller crusher 2.
As shown in fig. 7-9, the steel slag granulating system is located at the bottom of the working table 1, and includes a steel slag granulator 3 with a fully-closed mechanical structure, wherein the steel slag granulator 3 includes a roller 30, brackets 31 are respectively disposed on both sides of the roller 30, a driving motor 32 coaxially connected with the roller 30 is mounted on the bracket 31 on one side, a water-cooled hollow shaft 33 communicated with the inside of the roller 30 is mounted on the bracket 31 on the other side, the driving motor 32 can drive the roller 30 to rotate, and the water-cooled hollow shaft 33 can spray water to cool the inside of the roller 30. The lining plate 34 is installed on the inner wall of the roller 30, the crushing medium 35 is arranged in the roller 30, and the crushing medium 35 can be the existing steel ball and is used for crushing and granulating the steel slag in the steel slag granulator 3. As shown in fig. 8, a material collecting cover 36 communicated with the drum 30 is further installed on the periphery of the drum 30 near one end of the driving motor 32, an exhaust port 37 is opened at the upper end of the material collecting cover 36, a discharge port 38 is opened at the bottom end of the material collecting cover 36, a conveying device corresponding to the discharge port 38 is arranged at the bottom of the discharge port 38, steel slag after granulation treatment can fall onto the conveying device through the discharge port 38, and then the steel slag enters the subsequent process, and a vertically arranged grate plate 39 is further installed between the material collecting cover 36 and the drum 30, so that the screening of the size of the steel slag particle diameter is realized. During the continuous rotation of the drum 30, the high temperature steel slag is cooled and crushed in the closed drum of the granulator, wherein the exhaust port 37 is provided to promote further slag-iron separation.
The bottom of the double-roll crusher 2 is also provided with a transverse moving frame 4, the transverse moving frame 4 is provided with a feeding chute 40, the transverse moving frame 4 is also provided with a vibrating feeder 41 corresponding to the feeding chute 40, the water-cooling hollow shaft 33 is provided with a sealing cover 42 in a matching way, and one discharging end of the vibrating feeder 41 extends into the water-cooling hollow shaft 33 through the sealing cover 42. The steel slag crushed by the roll crusher 2 falls into the feeding chute 40, and then enters the steel slag granulator 3 through the closed cover 42 and the water-cooled hollow shaft 33 under the action of the vibrating feeder 41 to realize uniform and continuous feeding so as to facilitate subsequent granulation treatment.
The technical principle of the steel slag granulator 3 is similar to that of a ball mill, and a large number of innovative designs are carried out on the basis of the working principle of the ball mill, so that the steel slag granulator is suitable for the high-temperature working environment of steel slag and the requirement on the granularity of a finished product. The main improvement measures are as follows: 1. the diameter and length ratio of the cylinder body is 1.5-0.8, which is larger than that of a general ball mill, 2, the interior of the equipment runs in the environment with high temperature, water and steam, the material of the cylinder body and the lining plate 34 is high temperature resistant and humid environment, 3, the volume, specific gravity, material and the like of the steel balls in the cylinder body are different from those of the general ball mill, 4, the feed end is equipped with water cooling system, 5, feeding chute 40 is installed on sideslip frame 4, convenient to in time overhaul and change, 6, grid plate 39 designs for the annular, consider the iron removal requirement, gas vent 37 has been seted up to the upper end of cover 36 that gathers materials, 7, each part of equipment adopts flange and bolted connection, more make things convenient for the dismouting than general ball mill, 8, be equipped with water injection system, the water spray pipeline passes through water-cooling quill shaft 33 and gets into the barrel, 9, the feeding mode adopts vibrating feeder 41 pay-off, vibrating feeder 41's extension cell body gets into the cylinder cavity through water-cooling quill shaft 33.
The cooling water circulation system comprises a water pool 5 and a pump station 50, the pump station 50 is communicated with the steel slag pretreatment system and the steel slag granulation system through pipelines so as to achieve the purpose of cooling the steel slag by spraying water mist, a water return ditch 51 is further formed in the periphery of the bottom of the workbench 1, one end of the water return ditch 51 is located at the bottom of the steel slag granulation system, and the other end of the water return ditch 51 is communicated with the water pool 5 so as to achieve the purpose of recycling the cooling water.
The conveying equipment comprises a water filtering belt conveyor 60 and a bucket elevator 61, one end of the water filtering belt conveyor 60 is located at the bottom of the discharge hole 38, the bucket elevator 61 matched with the water filtering belt conveyor is installed at the other end of the water filtering belt conveyor, and a magnetic separation production line 62 is further arranged on the upper portion of the bucket elevator 61. The steel slag containing cooling water falls onto the water filtering belt conveyor 60 from the discharge opening 38, part of the steel slag after the cooling water is filtered is transferred to the bucket elevator 61, and the steel slag is transferred to the magnetic separation production line 62 by the bucket elevator 61 for subsequent treatment.
The bottom of the fixed dust hood 12 is provided with a first spray nozzle 52, the water-cooling hollow shaft 33 is internally provided with a second spray nozzle 53, and the first spray nozzle 52 and the second spray nozzle 53 are both communicated with a pump station 50 of a cooling water circulation system through a water spraying pipeline. The first spray nozzle 52 and the second spray nozzle 53 spray water mist on the steel slag in the steel slag groove 10 and the steel slag granulator 3 respectively, so as to achieve the purpose of cooling.
The technical principle of the steel slag pretreatment is as follows: the method comprises the steps of pretreating high-temperature steel slag with various physical forms, skimming the liquid steel slag by a skimming machine 18, spraying water to the steel slag by a water spraying system for cooling, changing the steel slag from the liquid state into a uniform high-temperature solid state, crushing the large high-temperature solid steel slag by the skimming machine 18 through mechanical force to form a uniform loose solid state, crushing the solid steel slag which is not mechanically crushed by the skimming machine 18 through extruding a roller crusher 2, and crushing all the steel slag to be below a target size by the roller crusher 2, so that the physical form of the steel slag is stable, and the reliability of subsequent treatment is guaranteed.
The principle of the steel slag granulation technology is as follows: the pretreated steel slag is normally at 600-800 ℃, and is directly fed into a steel slag granulator 3, a large amount of crushing medium 35 is arranged in a roller of the granulator, the crushing medium 35 can be the existing steel ball, the steel slag entering a cylinder body is firstly directly contacted with the steel ball, the steel slag is crushed by the rolling steel ball in the continuous rotation process of the roller, a high-pressure water nozzle is also distributed on the cylinder body, and meanwhile, the water is continuously sprayed for cooling, so that the rapid cooling and granulation of the steel slag are realized.
The steel slag pretreatment, the steel slag conveying and the steel slag granulation are all completed in a fully-closed mechanism and equipment, a large amount of steam and smoke dust are generated in the system and can escape from the joints with poor sealing, so that dust removing points can be arranged at the steam and dust generating positions, and the post environment in the whole production process is ensured to meet the environmental protection requirement.
Remove dust excluding hood 15 can include dust excluding hood body and dust excluding hood platform truck, and the dust excluding hood body can adopt steel sheet processing welding preparation, and the dust excluding hood platform truck comprises platform truck body frame, wheel, motor, speed reducer, transmission shaft, stop device, and platform truck body frame can adopt steel construction processing welding preparation.
As shown in fig. 10, the slag-raking machine 18 includes a rotating shaft 180, a plurality of groups of slag-raking teeth are mounted on the rotating shaft 180 and arranged along the length thereof, each group of slag-raking teeth includes a sleeve 181 sleeved on the rotating shaft 180, a tooth handle 182 is mounted on the periphery of the sleeve 181, the tooth handles 182 are circumferentially distributed, a roller tooth 184 is detachably mounted on the end of each tooth handle 182 through a bolt 183, and the rotating shaft 180 can drive the slag-raking teeth to rotate in the steel slag groove 10 for slag-raking. The rotating shaft 180 is a main shaft of a single roller and has the functions of bearing the roller teeth 184 and transmission, the roller teeth 184 are used as easily-damaged parts and are fixedly disassembled and assembled by the bolt 183, so that the roller teeth are convenient to replace in time, and the service life of the whole slag raking machine 18 is prolonged. The slag raking machine 18 is installed in the steel slag pretreatment chamber, the roller teeth 184 rotate to rake open liquid steel slag, water is sprayed for cooling, the purpose of cooling and conveying the steel slag is achieved, the roller teeth 184 rotate to crush large solid steel slag, the purpose of crushing the steel slag is achieved, the slag raking machine 18 horizontally travels back and forth, the steel slag is continuously pushed to a blanking port 19 at one end of the steel slag groove 10 to be discharged, and the purpose of conveying the steel slag is achieved. The slag raking machine 18 adopts a moving route of self-rotation and reciprocating movement, a motor drives a rotating shaft 180 of the slag raking machine 18 to rotate, the rotating shaft 180 is installed on a trolley 17, the trolley 17 is driven by the motor to reciprocate in a steel slag pretreatment chamber, and atomized cooling water is sprayed on the surface of the slag raking machine 18 during the working process, so that the operation under the high-temperature condition is adapted.
In order to prolong the service life of the slag raking machine 18 and the rotating shaft 180, as shown in fig. 11, the rotating shaft 180 is a water-cooling rotating shaft, one end of the water-cooling rotating shaft is provided with a rotating joint 185, the rotating joint 185 is provided with a water inlet 186, the water-cooling rotating shaft is internally provided with an axial water hole 187 along the length direction thereof, as shown in fig. 12-14, one end of the axial water hole 187 is communicated with the water inlet 186, the other end of the axial water hole 187 is communicated with a water return groove 188, the water-cooling rotating shaft is internally provided with a plurality of water slits 189 arranged along the circumferential direction thereof, one ends of the water slits 189 are communicated with the water return groove 188, the other ends of the water slits 189 are communicated with an annular water groove 190, the rotating joint 185 is internally provided with water holes 191 arranged along the circumferential direction, one end of each water hole 191 is communicated with the annular water groove 190, and the other end of each water hole 191 is provided with a water outlet 192. Wherein the water inlet 186 and the water outlet 192 are positioned at the same side of the rotating shaft 180, can be connected with a hose and is conveyed by a trolley drag chain, and the cooling water entering the rotating shaft 180 enters the water gaps 189 which are circumferentially distributed through the axis water hole 187 and the water return groove 188, so as to realize the omnibearing high-efficiency water cooling of the rotating shaft 180.
In order to prevent the roller crusher 2 from being incapable of working normally due to the overlarge grain size of the steel slag falling into the roller crusher 2, as shown in fig. 15, the roller crusher 2 comprises an installation frame 20, a fixed roller 21 and a sliding roller 22 are installed in the installation frame 20, an overload protection device is arranged between the sliding roller 22 and the installation frame 20, the overload protection device comprises an overload protection hydraulic cylinder 23, the overload protection hydraulic cylinder 23 is fixed on the installation frame 20, two ends of the sliding roller 22 are provided with a sliding bearing 24 and a bearing seat 25, the installation frame 20 is provided with a guide groove 26 matched with the bearing seat 25, a piston rod of the overload protection hydraulic cylinder 23 is fixedly installed on the bearing seat 25, when the steel slag falling into the roller crusher 2 is overlarge grain size and the fixed roller 21 and the sliding roller 22 are overloaded under stress, the overload protection hydraulic cylinder 23 can drive the sliding roller 22 to be far away from the fixed roller 21, thereby avoid taking place the condition that the roller blocked, guarantee its normal extrusion crushing function, wherein overload protection pneumatic cylinder 23 also can adopt the spring to replace, and above-mentioned fixed roller 21 and slip roller 22 also can adopt the water-cooling design in the pivot 180 to ensure that roller surface temperature can not too high in the use, the adaptation is the operation under the high temperature condition, and then improves whole double-roll crusher 2's life.
The driving units of the movable dust hood 15, the slag raking machine 18, the trolley 17 thereof and the roll crusher 2 can comprise: the motor, the speed reducer, the rotating shaft, the coupling and other public devices.
The process for efficiently treating the high-temperature steel slag disclosed by the invention is shown in figure 16 and comprises the following steps:
firstly, steel slag pretreatment:
transferring the steel slag obtained by steelmaking, hoisting the steel slag to the side of a steel slag groove 10 by a crane, opening a movable dust hood 15 in a translational mode, moving a slag raking machine 18 in the opposite direction, pouring the steel slag into the steel slag groove 10, and closing the movable dust hood 15; slag loosening, slag skimming and steel slag pushing are realized by walking of a slag skimming machine 18 arranged in the steel slag groove 10 and rotating of the roller teeth 184;
continuously spraying water to the steel slag while loosening, skimming and pushing the steel slag, cooling and crushing the liquid steel slag to form high-temperature massive steel slag at the temperature of 600-800 ℃, conveying the high-temperature massive steel slag to a blanking port 19 at one end of a steel slag groove 10 body, falling into a double-roll crusher 2, and extruding and crushing the steel slag by a roller until the particle diameter is less than 20cm to obtain pretreated steel slag;
granulating the steel slag:
the steel slag after pretreatment obtained in the step I is conveyed to a steel slag granulator 3 by a vibrating feeder 41 and is in direct contact with a crushing medium 35 in a roller 30 of the steel slag granulator 3, the steel slag is crushed to be less than 5mm in diameter by the rolling crushing medium 35 in the continuous rotation process of the roller 30, and is cooled to be below 100 ℃ by continuous water spraying and is conveyed to the next procedure by a conveying device.
The high-efficiency treatment process of the high-temperature steel slag of the invention is further described with reference to the following specific examples, which comprises the following steps:
firstly, steel slag pretreatment:
A. the movable dust hood 15 moves away from a working position to a standby position along the transverse rail 14, meanwhile, the slag raking machine 18 moves away in the opposite direction, the crown block lifts the steel slag tank to the position above a steel slag inlet 13 of the pretreatment chamber, the slag tank is tipped, the steel slag is poured into the steel slag groove 10, and after the slag dumping is finished, the movable dust hood 15 moves to the working position along the transverse rail 14 from the standby position to seal the pretreatment chamber;
B. when the dust hood 15 is moved to a proper position, the slag raking machine 18 is moved to a steel slag area to carry out slag raking operation, the slag raking machine 18 horizontally moves back and forth and continuously rotates the roller teeth 184 to loosen, rake and push the steel slag, and simultaneously, water is continuously sprayed on the high-temperature steel slag to realize preliminary cooling and crushing of the liquid steel slag to form high-temperature block-shaped steel slag, the high-temperature block-shaped steel slag is pushed to the chute body blanking port 19 by the slag raking machine 18 to fall into the double-roller crusher 2, large block crusting steel slag which is not crushed is oppositely extruded and crushed by the double rollers, and the vibration feeder 41 uniformly feeds the steel slag to the steel slag granulator 3;
granulating the steel slag:
C. granulation of steel slag
The vibrating feeder 41 uniformly feeds materials to the chute of the steel slag granulator 3, and sprays atomized water into the chute, the roller 30 of the steel slag granulator 3 continuously rotates, the steel slag entering the roller 30 and the crushing medium 35 mutually collide under the action of mechanical force generated by the rotation of the roller 30, and simultaneously sprays water for rapid cooling, high-temperature steel slag is granulated into uniform steel slag particles in the steel slag granulator 3 through the mechanical force action of the steel slag granulator 3 and the rapid cooling of cooling water, and then the steel slag particles are conveyed to the next procedure through conveying equipment, so that the high-efficiency and continuous production of steel slag treatment is realized;
D. product delivery
The granulated steel slag is discharged from a discharge port 38 of the steel slag granulator 3, falls into a water filtering belt conveyor 60 below, is separated from slag and water, enters a water return ditch 51, is converged into a water pool 5 for recycling, and is lifted by a bucket elevator 61, and is sent to a next treatment process by a magnetic separation production line 62.
The technical solution of the present invention is not limited to the scope of the embodiments of the present invention. The technical contents not described in detail in the present invention are all known techniques.
Claims (4)
1. A high-efficient processing system of high temperature attitude slag which characterized in that: the steel slag granulating system comprises a steel slag pretreatment system, a steel slag granulating system and a cooling water circulation system, wherein the steel slag pretreatment system comprises a workbench (1), a steel slag groove (10) is installed on the workbench (1), a closed hood (11) is installed at the periphery of the steel slag groove (10), a fixed dust hood (12) is installed at one end of the upper part of the closed hood (11), a steel slag inlet (13) is formed in the other end of the upper part of the closed hood (11), a transverse rail (14) is installed on the workbench (1) corresponding to the position of the steel slag inlet (13), a movable dust hood (15) capable of moving along the transverse rail (14) is installed on the transverse rail (14) in a matching manner, the movable dust hood (15) can completely seal the steel slag inlet (13), longitudinal rails (16) are further arranged on two sides of the steel slag groove (10), and a trolley (17) capable of moving along the longitudinal rails (16) is installed on the longitudinal rails in a matching manner, install slag-raking machine (18) on platform truck (17), slag-raking machine (18) are located slag bath (10), correspond to the position of fixed dust excluding hood (12), have seted up blanking mouth (19) in the bottom of slag bath (10), and roll crusher (2) are installed to the bottom of blanking mouth (19), slag granulation system is located workstation (1) bottom, including slag granulator (3), wherein slag granulator (3) include cylinder (30), and cylinder (30) both sides all are equipped with support (31), wherein install driving motor (32) coaxial continuous with cylinder (30) on support (31) of one side, install water-cooling hollow shaft (33) with inside UNICOM of cylinder (30) on support (31) of opposite side, install welt (34) on the inner wall of cylinder (30), are equipped with crushing medium (35) in cylinder (30), the periphery of the roller (30) close to one end of the driving motor (32) is also provided with an aggregate cover (36) communicated with the roller, the upper end of the aggregate cover (36) is provided with an exhaust port (37), the bottom end of the aggregate cover (36) is provided with a discharge port (38), the bottom of the discharge port (38) is provided with a conveying device corresponding to the discharge port, a vertically arranged grate plate (39) is further arranged between the aggregate cover (36) and the roller (30), the bottom of the roll crusher (2) is also provided with a transverse moving frame (4), the transverse moving frame (4) is provided with a feeding chute (40), a vibrating feeder (41) is further arranged on the transverse moving frame (4) corresponding to the position of the feeding chute (40), the water cooling (33) is provided with a closed cover (42) in a matching manner, and the discharging end of the vibrating feeder (41) extends into the water cooling hollow shaft (33) through the closed cover (42), the cooling water circulation system comprises a water pool (5) and a pump station (50), the pump station (50) is communicated with a steel slag pretreatment system and a steel slag granulation system through pipelines, a water return channel (51) is further formed in the periphery of the bottom of the workbench (1), one end of the water return channel (51) is located at the bottom of the steel slag granulation system, the other end of the water return channel (51) is communicated with the water pool (5), the slag raking machine (18) comprises a rotating shaft (180), a plurality of groups of slag raking teeth arranged along the length of the rotating shaft (180) are arranged on the rotating shaft (180), each group of slag raking teeth comprises a sleeve (181) sleeved on the rotating shaft (180), tooth handles (182) are arranged on the periphery of the sleeve (181), the tooth handles (182) are distributed in a circumferential direction, roller teeth (184) are detachably arranged on the end portion of each tooth handle (182) through bolts (183), the rotating shaft (180) can drive the slag raking teeth to rotate to rake slag in the steel slag groove (10), the utility model discloses a water-cooling rotary shaft, including pivot (180) and water-cooling rotary shaft, rotary joint (185) are installed to the one end of water-cooling rotary shaft, water inlet (186) have been seted up on rotary joint (185), axle center water hole (187) have been seted up along its length direction in the water-cooling rotary shaft, the one end and the water inlet (186) looks UNICOM of axle center water hole (187), the other end UNICOM of axle center water hole (187) has return water tank (188), set up a plurality of water gaps (189) of arranging along its circumference in water-cooling rotary shaft inside, the one end of water gap (189) all communicates with return water tank (188), the other end and annular basin (190) looks UNICOM of water gap (189), water hole (191) that circumference was arranged are seted up in rotary joint (185), the one end and annular basin (190) looks UNICOM of water hole (191), delivery port (192) have then been seted up to the other end of water hole (191).
2. The high-efficiency treatment system for the high-temperature steel slag as claimed in claim 1, wherein the high-efficiency treatment system comprises: roll crusher (2) are including installation frame (20), install fixed roller (21) and slip roller (22) in installation frame (20), are equipped with overload protection device between slip roller (22) and installation frame (20), and overload protection device includes overload protection pneumatic cylinder (23), and overload protection pneumatic cylinder (23) are fixed on installation frame (20), slide bearing (24) and bearing frame (25) are installed to the both ends of slip roller (22), set up on installation frame (20) with bearing frame (25) matched with guide way (26), the piston rod fixed mounting of overload protection pneumatic cylinder (23) is on bearing frame (25), when the atress was transshipped between fixed roller (21) and the slip roller (22), overload protection pneumatic cylinder (23) can drive slip roller (22) and keep away from fixed roller (21).
3. The high-efficiency treatment system for the high-temperature steel slag as claimed in claim 1, wherein the high-efficiency treatment system comprises: conveying equipment includes drainage belt feeder (60) and bucket elevator (61), drainage belt feeder (60) one end is located bin outlet (38) bottom, and bucket elevator (61) rather than matched with is installed to the other end, still is equipped with magnetic separation production line (62) on bucket elevator (61) upper portion.
4. The high-efficiency treatment system for the high-temperature steel slag as claimed in claim 1, wherein the high-efficiency treatment system comprises: first shower nozzle (52) are installed to fixed dust excluding hood (12) bottom, install second shower nozzle (53) in water-cooling hollow shaft (33), and first shower nozzle (52) and second shower nozzle (53) all are through water spray pipeline and cooling water circulation system's pump station (50) looks UNICOM.
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| CN2682086Y (en) * | 2004-02-27 | 2005-03-02 | 宝山钢铁股份有限公司 | Eccentric style roller method molten slag treating equipment |
| JP2009204231A (en) * | 2008-02-28 | 2009-09-10 | Research Institute Of Innovative Technology For The Earth | Heat recovering device from fusion blast furnace slag |
| CN101545018B (en) * | 2008-03-25 | 2011-07-20 | 宝山钢铁股份有限公司 | Technological method of ladle slag thermal processing |
| CN102312024B (en) * | 2011-07-28 | 2013-08-21 | 郭荣芝 | Method and system for mechanical granulation of metallurgy slag and waste heat recovery |
| KR20150080420A (en) * | 2013-12-30 | 2015-07-09 | 주식회사 우진 | Cover combination and seperation device for preventing dust in a steel mill |
| CN107557505A (en) * | 2016-06-30 | 2018-01-09 | 宝山钢铁股份有限公司 | It is adapted to the drum process handling process and processing unit of full dose slag processing |
| CN108559810B (en) * | 2018-03-13 | 2024-03-15 | 济钢集团国际工程技术有限公司 | Steel slag pretreatment device |
| CN209522865U (en) * | 2019-01-30 | 2019-10-22 | 中钢集团西安重机有限公司 | A kind of rotary joint with water-cooling structure |
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