CN113430307B - Liquid steel slag dry processing device and working mode thereof - Google Patents

Liquid steel slag dry processing device and working mode thereof Download PDF

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CN113430307B
CN113430307B CN202110624720.5A CN202110624720A CN113430307B CN 113430307 B CN113430307 B CN 113430307B CN 202110624720 A CN202110624720 A CN 202110624720A CN 113430307 B CN113430307 B CN 113430307B
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steel slag
slag
temperature
cooler
medium
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CN113430307A (en
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刘春茗
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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
    • 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
    • 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
    • C21B3/10—Slag pots; Slag cars
    • 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
    • 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
    • C21B2400/026—Methods of cooling or quenching molten slag using air, inert gases or removable conductive bodies
    • 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
    • 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
    • C21B2400/066—Receptacle features where the slag is treated
    • C21B2400/072—Tanks to collect the slag, e.g. water tank
    • 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

The invention discloses a liquid steel slag dry processing device and a working mode thereof, relates to the technical field of liquid steel slag primary processing devices in the steel industry, and particularly relates to a liquid steel slag dry processing device and a working method thereof. The cooler of the invention is arranged at the upper part of the bracket; a horizontal material bed of the cooler is arranged on the upper part of the bracket through a riding wheel; the shell is covered on the upper part of the horizontal material bed; a tundish is arranged at the inlet end of the cooler, a slag flowing groove is arranged at the lower part of the tundish, and the slag flowing groove penetrates through the cooling wall of the cooler and extends into the cooler; an electric trolley is arranged on the rack on one side of the inlet end of the cooler; the slag pot is arranged on the electric trolley; the ejector is arranged at the inlet end of the cooler and is positioned at the lower part of the tundish, and the front port part of the ejector penetrates through the cooling wall of the cooler and then points to the outlet of the slag flowing groove in the oblique upper direction. The technical scheme of the invention solves the problem of secondary pollution caused by cooling with liquid water level refrigerant in conventional equipment in the prior art and the technical problem of the 201711130103.X patent.

Description

Liquid steel slag dry processing device and working mode thereof
Technical Field
The invention discloses a liquid steel slag dry processing device and a working mode thereof, relates to the technical field of liquid steel slag primary processing devices in the steel industry, and particularly relates to a liquid steel slag dry processing device and a working method thereof.
Background
The treatment of the steel-making raw slag (high-temperature liquid is called as high-temperature raw slag or raw slag without any treatment) in the steel industry is divided into three processes of primary treatment (the process of technically treating the liquid raw slag into normal-temperature solid slag), secondary treatment (the normal-temperature solid slag is separated from steel scrap or called as slag steel and tailings by means of technical treatment such as crushing, screening, back-and-forth transferring, iron selection and the like), and tertiary treatment (the residual steel tailings are comprehensively utilized by technical means, such as preparing steel tailings into steel slag powder, making bricks from the steel tailings and the like); the core of the three treatment processes is one-time treatment, namely how to technically treat the liquid high-temperature slag to change the liquid high-temperature slag into a normal-temperature solid state; in the primary treatment process, the steel slag is crushed as much as possible, and the smaller the crushed size is, the better the crushed size is, so that secondary treatment is facilitated; if the steel slag particles after primary treatment are small enough, the traditional secondary treatment link can be omitted, the dust pollution generated in the secondary treatment process is eliminated, and the energy consumption in the secondary treatment process is saved; and is beneficial to the third treatment, and reduces the dust pollution and energy consumption of the third treatment.
The main current technology for primary treatment of smelting steel slag in the current market is a pressure hot stuffiness + water pumping method with a tank and a water quenching roller method, cooling media are liquid water, a raw slag treatment process taking the liquid water as a refrigerant can cause secondary pollution (pollution of dust, steam, a mixture of the dust and the steam, surface water quality, underground water quality, a local heat island, sludge and other forms), and the secondary pollution is difficult to thoroughly treat; the fundamental reason for generating the secondary pollution is the inherent limitation of the primary treatment technology of the steel slag, so that the steel industry is difficult to realize the carbon emission reduction, which is also one of the bottleneck and the barrier which are difficult to exceed by the mainstream technology in the current market.
Because the temperature of the liquid raw slag is 1450-1600 ℃ during slag discharging at the smelting end point, the surface of equipment in contact with the high-temperature raw slag needs to have enough high temperature resistance, oxidation resistance and thermal stability in a long-term high-temperature state during the long-term operation process when the high-temperature raw slag is treated at one time; how to solve the problem is a problem which must be faced and can not be avoided, and the problem also becomes another technical bottleneck and obstacle which are difficult to overcome by the steel slag treatment technology. In order to break through the technical bottleneck and barrier, many efforts are made in the industry including patent technologies such as 201711130103.X, etc., but the prior art 201711130103.X still has the following problems:
1, a grate bed surface formed by sequentially and alternately stacking a plurality of fixed beds and a plurality of stepping beds in a step-shaped longitudinal direction from top to bottom is arranged in a closed stepping cooler, and a working critical suspension state is adopted, so that high-temperature steel slag and the plurality of beds are almost in a direct contact state, and the plurality of beds are directly roasted at a temperature of over thousand degrees; in order to solve the high temperature radiation, the multi-slice bed must be made of high temperature resistant materials, which leads to the rise of equipment cost; due to high-temperature radiation, the performance attenuation and the damage speed of the multi-slice bed material are accelerated, the long-term safe and stable operation of equipment is influenced, the operation and maintenance cost is increased, and the multi-slice bed adopts a casting process and is machined, so that the manufacturing cost is high, and the maintenance cost is high, and is unacceptable for enterprises;
2 the numerical range of the angle a formed by a straight line formed by the midpoints of the multi-piece fixed bed and the multi-piece stepping bed and a horizontal line is 10 0 ～22 0 ", the processing equipment is in an inclined state with the horizontal direction, so that the fall of the processing equipment in the height direction is increased, the occupied space is increased, the elevation of the track of the processing cross-casting crane is forced to be raised, and the structural cost is increased;
3 the numerical range of the angle a formed by the straight line formed by the midpoints of the multi-piece fixed bed and the multi-piece stepping bed and the horizontal line is 10 0 ～22 0 The processing equipment is in an inclined state, so that the difficulty in design, manufacture, installation and debugging is increased;
4, a hot air suction opening is arranged above the middle part of the closed stepping cooler, and only one suction opening is arranged, so that high-temperature smoke, medium-temperature smoke and low-temperature waste gas cannot be recovered in a gradual cooling process of the steel slag, the final cooling temperature of the steel slag in the cooling equipment is difficult to control, the final temperature of the steel slag is controlled, the smoke temperature is reduced, waste heat recovery is not facilitated, the waste heat recovery temperature is controlled, the final cooling of the steel slag is higher than the normal temperature, the operation is difficult to control, and the next process operation is not facilitated;
5, when molten steel slag is tipped over and poured into the steel slag inlet, the dust hood is opened, the steel slag is poured into the sealed step cooler, when the tipping operation is finished, the dust hood is buckled on the steel slag inlet to prevent external cold air from entering and reducing the temperature of hot flue gas, and the frequent opening and closing of the dust hood causes a large amount of cold air to enter, so that the temperature of the internal hot flue gas is greatly fluctuated, the stable recovery of waste heat is not facilitated, and dust pollution is caused;
6, the materials selected by the high-temperature isolation screen 4 are determined to be 60CrNiMo, 0Cr25Ni22 series and 4Cr28Ni48W5Si2, the high-temperature isolation screen needs to bear the temperature similar to that of liquid steel slag, so that high-temperature resistant materials are forced to be adopted, and even though the materials need to bear and repeatedly alternate high-temperature radiation baking for a long time, the oxidation resistance of the materials in a high-temperature state, the stability of the structure size in the high-temperature state and the reduction range of the mechanical property can influence the long-term, safe and stable operation of equipment;
7, a high-temperature isolating screen is arranged to screen out large steel slag and slag lumps in the slag, the steel slag is hoisted away by a crane electromagnetic crane, the steel slag is broken once through the sifting action of the high-temperature isolating screen, the high-temperature isolating screen can play a role in screening out large slag lumps, but the production operation time is long, the steel slag gradually forms skin, coats and solidifies on the surface of the high-temperature isolating screen, the screen holes are gradually reduced, the amount of the slag entering the equipment for treatment is gradually reduced, more and more steel slag are discharged through the high-temperature lattice screen, so that the normal production is influenced, and the high-temperature isolating screen has to be maintained frequently or even replaced;
8, the material selected by the high-temperature isolation screen is determined to be 60CrNiMo, 0Cr25Ni22 series and 4Cr28Ni48W5Si2, although the high-temperature isolation screen adopts high-temperature resistant materials, the manufacturing cost of the high-temperature resistant materials is generally several times or even ten times higher than that of plain carbon steel, so that the manufacturing cost of the whole equipment is high, the cost of maintaining and even replacing the high-temperature isolation screen is high, the production cost is increased, and enterprises are difficult to accept;
and 9, the grate bed of the stepping cooler is divided into a movable bed and a fixed bed, the movable bed and the fixed bed are alternately lapped in a row-by-row manner, all transverse rows of movable beds reciprocate in the row direction (longitudinal direction) under the action of the stepping driving device, the grate bed of the stepping cooler moves in the row direction (longitudinal direction is row), and when steel slag is conveyed, one row of grate beds of two adjacent rows of grate beds reciprocates in the longitudinal direction and the other row does not move. When one movement period is finished, the moving column direction grate bed of the previous movement period does not move, and the moving column direction grate bed does reciprocating motion. Thus, the steel slag is conveyed out of the device by the movement of the grid bed in the crossed and staggered way, which results in that: firstly, the movable beds and the fixed beds are mutually overlapped alternately, and when all the transverse movable beds reciprocate along the column direction (longitudinal direction), because the surfaces of the grate beds are in an alternately overlapped plane parallel state and the high-temperature steel slag is in direct contact with the grate beds, the grate plates are still easily overheated and burnt out due to the fact that the grate beds are in a critical suspension state and are in direct contact with the high-temperature steel slag for a long time; the movable bed and the fixed bed are mutually overlapped alternately, crossed and staggered to move towards the grate bed, a column of longitudinal reciprocating motion and a column of motionless motion mode, so that the structural form is extremely complex and even can not be realized at all, the longitudinal arrangement height drop of the equipment is large, the longitudinal movement of the whole column of longitudinal grate plates can not be realized, but the independent longitudinal movement of the movable bed arranged on the equipment can not be realized in a limited space, namely, the longitudinal movement of the whole column of longitudinal grate beds can not be realized easily, the alternate overlapping of the movable bed and the longitudinal movement of the movable bed can not be realized easily, the two sets of motion mechanisms are in parallel motion relation, and the mechanical failure can not be ensured to run safely easily under the high-temperature environment; meanwhile, the movable bed and the fixed bed which are horizontally arranged on the surface of the patent do not consider the sealing between rows and columns, between rows and columns and between every two grid plates, so that the material leakage phenomenon is easy to generate, high-temperature materials leak to the lower part of the grid plates to be accumulated, and equipment arranged below the grid plates is easy to burn down after long-term operation; the arrangement of sealing facilities between rows and columns and between every two grate plates for preventing material leakage is not considered, so that the material leakage time is caused frequently, equipment for conveying the leaked materials under the grate plates has to be added, and the height of the equipment and the implementation difficulty are increased; the equipment for conveying the leaked materials is easy to burn out by the leaked materials at high temperature due to the higher temperature of the leaked materials, so that accidents are caused.
In view of the problems in the prior art, it is necessary to develop a novel liquid steel slag dry processing device and a working method thereof, so as to overcome the problems in the prior art.
Disclosure of Invention
The conventional equipment provided by the prior art has the problem of secondary pollution caused by cooling with liquid water level refrigerants, and the technical problem of the 201711130103.X patent.
The technical means adopted by the invention are as follows:
a liquid steel slag dry processing device comprises: the slag pot, the electric trolley, the tundish, the ejector, the cooler and the bracket;
further, the cooler is arranged at the upper part of the bracket;
further, the cooler includes: a shell and a horizontal material bed; the horizontal material bed is arranged on the upper part of the bracket through a riding wheel; the shell covers the upper part of the horizontal material bed;
further, the horizontal lathe bed divide into: the self-feeding bed body and the other feeding bed bodies;
furthermore, a tundish is arranged at the inlet end of the cooler, and the bottom surface of the tundish forms an included angle of 5 degrees with the horizontal plane, so that the liquid steel slag can naturally flow along the bottom inclined plane by virtue of natural gravity and the liquid level pressure difference of the steel slag entering the tundish; the lower part of the tundish is provided with a slag flowing groove which penetrates through a cooling wall of the cooler and extends into the cooler;
further, an electric trolley is arranged on the rack on one side of the inlet end of the cooler;
further, the slag pot is arranged on the electric trolley, and after moving to the edge of the rack along with the electric trolley, the steel slag is unloaded into the tundish;
furthermore, the ejector is arranged at the inlet end of the cooler and positioned at the lower part of the tundish, the front port part of the ejector penetrates through the cooling wall of the cooler and then points to the outlet of the slag flowing groove obliquely upwards, high-temperature slag flowing out of the slag flowing groove flows to the middle part of the cooler and is blown and ejected, and the jet medium of the ejector is one of the mixture of ambient atmosphere, inert gas, ambient atmosphere and a small amount of liquid water.
Furthermore, the main body of the shell is a cooling wall which is a rectangular shell structure with an open bottom and five closed surfaces, and an insulating layer is arranged outside the cooling wall; an insulating layer is laid outside the water-cooled wall to achieve the effect of heat preservation, so that the heat efficiency is improved;
furthermore, the upper part of the cooling wall is provided with a high-temperature tuyere, a medium-temperature tuyere and a low-temperature tuyere;
furthermore, the upper part of the cooling wall is provided with a medium-high temperature steam drum and a medium-low temperature steam drum; the medium-high temperature steam pocket is arranged between the high-temperature air port and the medium-temperature air port and communicated with the interior of the cooling wall; the medium-low temperature steam pocket is arranged between the medium-temperature air port and the low-temperature air port and communicated with the inside of the cooling wall;
furthermore, a medium-high temperature heat shield and a medium-low temperature heat shield are arranged inside the cooling wall; the medium-high temperature heat shield is arranged inside the cooling wall and is positioned between the high-temperature air port and the medium-temperature air port; the medium-low temperature heat shield is arranged in the cooling wall and is positioned between the medium-temperature air port and the low-temperature air port.
Further, the self-feeding lathe bed comprises: the device comprises a lathe bed, a supporting structure, a sealing structure and an oil cylinder A;
furthermore, the bed body consists of a plurality of rows of grid plate groups, and each row of grid plate group is formed by connecting a plurality of unit grid plates in series; the unit grid plate 7a is made of a common carbon steel plate by adopting a cold-working punch forming process;
further, the support structure comprises: a support beam and a support beam B; the supporting beam and the supporting beam B are made of common carbon steel plates;
further, the seal structure includes: door type sealing and L type sealing;
furthermore, the grate plate group is fixedly arranged at the upper part of the support beam, and the support beam is arranged along the length direction of the cooler; the supporting beam is arranged on the riding wheel at the top of the bracket;
furthermore, L-shaped seals are symmetrically arranged on two sides of the supporting beam; the support beam and the L-shaped seal wrap and support the bottom and two sides of the grate plate group;
furthermore, the gate-shaped seal is arranged at the upper part between the two adjacent groups of the grid plate groups, the gate-shaped seal is arranged along the length direction of the cooler, and two ends of the gate-shaped seal are fixed on the cooler to seal the gap between the two adjacent groups of the grid plate groups;
furthermore, the oil cylinders A are in multiple groups, and each group of oil cylinders A is matched and assembled with one group of grid plate groups; the cylinder body of the oil cylinder A is obliquely fixed on the support, the piston rod is hinged with the bottom of the supporting beam, the expansion of the piston rod drives a group of grate plate groups to move back and forth along the length direction of the cooler, and the steel slag on the lathe bed is actively pushed to an outlet of the cooler;
furthermore, the self-feeding bed body adopts a self-feeding mode, and power for pushing the steel slag particles B on the bed body from the slag inlet to the slag outlet is provided by an oil cylinder; the oil cylinder drives the supporting beam to realize reciprocating motion so as to push the steel slag particles B to move towards the outlet direction in the continuous cooling process.
Further, the feeding bed comprises: the device comprises a lathe bed, a supporting structure, a sealing structure and a steel slag pushing device;
furthermore, the bed body consists of a plurality of rows of grid plate groups, and each row of grid plate group is formed by connecting a plurality of unit grid plates in series; the unit grid plate 7a is made of a common carbon steel plate by adopting a cold-working punch forming process;
further, the support structure comprises: a support beam and a support beam B; the supporting beam and the supporting beam B are made of common carbon steel plates;
further, the seal structure includes: door type sealing and L type sealing;
furthermore, L-shaped seals are symmetrically arranged on two sides of the support beam; the bottom and two sides of the grate plate group are wrapped and supported by the support beams and the L-shaped seal;
furthermore, the support beams B are arranged at the upper part between two adjacent groups of grate plate groups and arranged along the length direction of the cooler;
furthermore, the upper part of the support beam B is provided with a gate-shaped seal which seals a gap between two adjacent groups of grid plate groups;
further, the slag pusher is the multiunit, is made by heat-resisting cast steel, and every group slag pusher all includes: an oil cylinder B, a steel slag conveyor and a scraper; the steel slag conveyor is arranged at the upper part of the gate-shaped seal, and two sides of the steel slag conveyor are respectively and horizontally provided with a scraper; the cylinder body of the oil cylinder B is obliquely fixed on the support, the piston rod is hinged with the bottom of the supporting beam B, the telescopic action of the piston rod drives the steel slag pushing device to move back and forth along the length direction of the cooler, and the steel slag falling on the lathe bed is pushed towards the outlet direction of the cooler;
furthermore, the other feeding mode is adopted by the other feeding bed body, and the power for pushing the steel slag particles B on the bed body from the slag inlet to the slag outlet is provided by the oil cylinder B; the oil cylinder B drives the supporting beam to realize reciprocating motion, and the scraper on the supporting beam pushes the steel slag particles B to move towards the outlet direction in the continuous cooling process.
Further, the unit louver includes: a middle ventilating grate plate and a peripheral baffle plate;
further, the surrounding baffle is of a rectangular frame structure with an open top;
furthermore, the middle ventilating grate plate is arranged inside the surrounding baffle plates;
furthermore, the edge of the surrounding baffle is higher than the upper end surface of the middle air-permeable grate plate to form a concave structure.
Furthermore, vent holes are formed in the bottom of the surrounding baffle and the support beam; the lower part of the vent hole of the support beam is provided with an air volume adjusting valve;
further, the air volume adjusting valve includes: the air inlet is communicated with the air outlet;
furthermore, the shell is of a vertically-through rectangular structure, the top of the shell is fixedly arranged at the bottom of the support beam and communicated with the vent holes in the support beam, and the bottom of the shell is connected with an external air supply system;
furthermore, the adjusting plate is arranged in the shell, and the top of the adjusting plate is suspended on a shaft in the shell;
furthermore, the adjusting plate is provided with an air hole;
furthermore, the top end of the tongue plate is fixedly arranged on the upper surface of the adjusting plate.
Furthermore, the air quantity balance regulating valve is fixed below the grate plate group, the supply and regulation of the cooling air quantity of the horizontal cooling bed are automatically completed by the air quantity balance regulating valve, the cooling air quantity of the grate plate of the supply unit is automatically regulated according to the resistance formed by the steel slag particles and the steel slag particles on the grate plate group, and the action principle is as follows: when the steel slag particles cover the ventilating grate plate to form certain resistance, the cooling gas passes through the air quantity balance adjusting valve from bottom to top, the airflow is divided into two parts, and one part flows through a channel between the adjusting valve plate and the shell; the other part of the liquid flows through a channel between the shell and the tongue plate; when the resistance is increased or smaller, the included angle between the adjusting valve plate and the shell can be automatically adjusted according to the resistance of the steel slag layer.
The working mode of the liquid steel slag dry processing device is characterized by comprising the following steps:
A. transferring steel slag: conveying liquid raw slag obtained at the steelmaking end point to a treatment span through a slag ladle, hoisting the liquid raw slag to a trolley support by a casting crane, placing the trolley support on an electric trolley, starting the electric trolley to slowly move to a tundish, and automatically stopping operation; the liquid steel slag in the slag tank is slowly poured into the tundish by the slag turning mechanism on the electric trolley; the slag liquid entering the tundish flows into the cooler under the action of the inclination angle of the inclined plane at the bottom of the tundish (the included angle between the bottom surface and the horizontal plane is 5 degrees), so that the liquid steel slag can naturally flow along the inclined plane at the bottom by virtue of natural gravity and the liquid level pressure difference of the steel slag entering the tundish;
B. steel slag lasing: the ejector fixed at the bottom right below the tundish ejects the cooling medium to the right front to flow out of the high-temperature liquid slag flow; ejecting the liquid slag flow to the direction of the horizontal material bed; the jet medium of the jet device can be ambient atmosphere, can also be other inert gases such as argon, can also adopt the ambient atmosphere and add a small amount of liquid water mixture form, do so first in order to reduce the temperature of the steel slag granule A, second dispel high-temperature slag stream and steel slag granule A because of steel-making slagging process add calcium oxide, strengthen and dispel the function of free calcium oxide, free magnesia harmful component, this part of liquid water meets the liquid slag stream of high temperature and vaporizes instantaneously after the jet flow goes out together with ambient air, make the cutting of the liquid slag stream of high temperature, crushing effect better, and the temperature is further reduced; the parameters of the jet device are adjusted to obtain steel slag particles B with the particle size smaller than or equal to 10mm, the steel slag particles B can be adjusted within the range of 10mm, and the steel slag particles are smaller than or equal to 10mm, so that the dust pollution in the traditional secondary treatment link of the traditional steel slag secondary treatment process does not need to be reserved and can be thoroughly cured; meanwhile, the range of the steel slag particles B is adjustable within the range of 10mm, so that the processes of screening, crushing, coarse grinding and the like of the steel tailings in the three-time treatment process are reduced, and the energy consumption and the dust pollution are reduced; compared with the traditional hot stuffiness, pressure hot stuffiness and roller method, the magnetic separation method is more convenient for separating the tailings from the slag steel and is easy to realize; because the granularity of the steel slag particles B obtained by adopting the liquid-melt slag flow jet technology is uniform and adjustable within the range of 10mm, and the particles are regular and are circular or elliptical, the treatment process is optimized, the flow is shortened, the occupied land is saved, the secondary treatment link is cancelled, and the investment is reduced;
C. cutting a slag flow: the high-temperature liquid slag flow is cut into slices and strips under the cutting action of the jet flow medium, and then is cut into smaller slice strips when meeting air resistance in the forward flying process along with the jet flow medium, and then the slag liquid vibrates, so that the steel slag is crushed and sucked into spherical steel slag particles A, the spherical steel slag particles A continuously fly forwards in a parabolic track under the action of the jet flow medium, the surface of the steel slag particles A is rapidly cooled from a liquid phase to a solid phase in a very short time, the high-temperature steel slag is primarily cooled, but the core part of the high-temperature steel slag is still possibly in a liquid phase state; finally, the mixture falls on a horizontal material bed;
D. cooling wall heat exchange: in the step C, the high-temperature liquid slag flow and the steel slag particles A flying in the air continuously release radiant heat to be received by a water-cooled wall of the cooler, so as to heat a cooling medium in the water-cooled wall, and the cooling medium steam obtained by evaporation is stored in a medium-high temperature steam pocket;
E. material bed heat dissipation: the steel slag particles B falling onto the horizontal material bed are in a stacked state and still have higher temperature, and can continuously release heat in the process of pushing the horizontal material bed to the slag outlet, and the part of heat is also received by a water-cooled wall of a cooler and is used for heating a cooling medium in the water-cooled wall to evaporate, so that cooling medium steam is obtained and stored in a medium-high temperature steam pocket and a medium-low temperature steam pocket;
F. cooling and solidifying: after falling into the horizontal material bed, the steel slag particles A form steel slag particles B, the steel slag particles B cover the middle air-permeable grate plate, and then are sprayed by a cooling medium which is upwards sprayed from the lower part of the middle air-permeable grate plate and forms an angle of 45-60 degrees with the horizontal direction, so that the steel slag particles B are continuously cooled; under the reciprocating pushing action of the horizontal material bed, the steel slag particles B are further cooled, the depth of the steel slag particles B condensed into shells is deeper and deeper, and the liquid phase part is less and less until the steel slag particles B are completely solidified and become a solid state to a normal temperature state;
G. flue gas absorption: in the step F, the steel slag particles B are cooled, air is heated to obtain hot flue gas, then steel slag waste heat is separated out and appears in the form of hot flue gas, and the hot flue gas is pumped out through a high-temperature air port, a medium-temperature air port and a low-temperature air port respectively to obtain steel slag waste heat; the middle-high temperature heat shield and the middle-low temperature heat shield divide the space above the horizontal cooling bed and inside the cooler into a high-temperature area, a middle-temperature area and a low-temperature area, so that high-temperature flue gas, middle-temperature flue gas and low-temperature flue gas can be respectively recovered according to the temperature range of the hot flue gas, and the waste heat recovery efficiency is effectively improved;
H. pushing slag: and pushing the steel slag particles B to a steel slag outlet by adopting one of a self-feeding mode and an other feeding mode, outputting the steel slag particles B to a cooler, and entering the next working procedure.
Further, the bed body adopted by the self-feeding mode is a self-moving feeding mode, and the self-moving feeding mode is divided into the following modes:
further, mode a: all the grate plate groups are pushed out towards the steel slag outlet at the same time at intervals of T 0 Time, the first row of grid plate groups is drawn back; at the interval of T0, the grid plate group in the second row is drawn back, at the interval of T0, the grid plate group in the third row is drawn back; the process is repeated until all the grate plate groups are drawn back;
further, mode B: the first grate plate group is pushed out towards the steel slag outlet direction at intervals of T 0 Time, the second row of grid plate group is pushed out towards the steel slag outlet; at the time interval of T0, pushing out the steel slag spraying direction of the third row of grid plate groups; the process is repeated until all grate plate groups are pushed out at the interval of T0, all grate plate groups are withdrawn at the same time at the interval of T0;
further, mode C: the first grate plate group is pushed out towards the steel slag outlet direction at intervals of T 0 Time, the first row of grid plate groups is drawn back; interval T 0 Time, second row of grid plate group push out, interval T 0 Time, drawing back the second row of grid plate groups, repeating the steps until all the grid plate groups are drawn back;
furthermore, the self-feeding mode can be used for conveying steel slag in other motion modes besides the conveying mode;
furthermore, the feeding mode is a mode of fixing the bed body and conveying by depending on the movement of the steel slag conveyor, and the feeding mode is divided into the following modes:
further, mode a: all steel slag conveyors push towards the steel slag outlet at the same time at intervals of T 0 Time, first steel slag transportationThe machine is sent to be drawn back; at the interval of T0, the second steel slag conveyor is withdrawn, at the interval of T0, the third steel slag conveyor is withdrawn; the process is repeated until all the steel slag conveyors are drawn back;
further, mode B: the first steel slag conveyor is pushed out towards the steel slag outlet direction at an interval of T 0 In time, the second steel slag conveyor pushes the steel slag to the steel slag outlet direction; at the time interval of T0, pushing out the steel slag in the third steel slag conveyor; the process is repeated until all the steel slag conveyors are pushed out at an interval of T0 time, all the steel slag conveyors are withdrawn at the same time at an interval of T0 time;
further, mode C: the first steel slag conveyor is pushed out towards the steel slag outlet at an interval of T 0 Time, the first steel slag conveyor is withdrawn; interval T 0 Time, the second steel slag conveyor is pushed out towards the steel slag outlet at an interval T 0 Time, the second steel slag conveyor is withdrawn; the process is repeated until all the steel slag conveyors are drawn back;
furthermore, the feeding mode can be other motion modes besides the conveying mode for conveying the steel slag.
Compared with the prior art, the invention has the following advantages:
the liquid steel slag dry processing device and the working mode thereof provided by the invention overcome the problems of secondary pollution (dust, water vapor, mixture of the dust and the water vapor, surface water quality, underground water quality, local heat island, sludge and other various forms) caused by using liquid water as a refrigerant in a mainstream processing technology;
2. the liquid steel slag dry processing device and the working mode thereof provided by the invention cancel the traditional secondary processing link, thoroughly eliminate the dust pollution of the traditional secondary processing link and save the whole energy consumption of the secondary processing link;
3. the liquid steel slag dry processing device and the working mode thereof relatively reduce the dust pollution of the third processing link and the energy consumption of the third processing link;
4. the liquid steel slag dry processing device and the working mode thereof save the occupied area and reduce the investment and operation cost;
5. the liquid steel slag dry processing device and the working mode thereof provided by the invention improve all the problems in the prior art 201711130103. X.
In conclusion, the technical scheme of the invention solves the problem of secondary pollution caused by cooling with liquid water level refrigerant in conventional equipment in the prior art and the problem of the 201711130103.X patent.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a view A-A of FIG. 1;
FIG. 3 is a view B-B of FIG. 1;
FIG. 4 is a schematic structural view of an adjacent metering grate plate group of the self-feeding bed body;
FIG. 5 is a schematic structural view of other feeding bed body adjacent metering grate plate groups;
FIG. 6 is a schematic view of the structure of the unit grate plate and the air volume adjusting valve.
In the figure:
1. a slag pot;
2. an electric trolley;
3. a tundish 31 and a slag flowing groove;
4. an ejector;
5. the device comprises a cooler 51, a cooling wall 521, a high-temperature tuyere 522, a medium-temperature tuyere 523, a low-temperature tuyere 531, a medium-high temperature steam drum 532, a medium-low temperature steam drum 541, a medium-high temperature heat shield 542, a medium-low temperature heat shield 55 and a heat preservation layer;
6. high-temperature slag flow 61, steel slag particles A62, steel slag particles B63 and steel slag particles C;
7. the horizontal material bed 7a, the unit grate plate 7a1, the middle ventilating grate plate 7a2, the peripheral baffle plate 7b, the grate plate group 7c, the steel slag conveyor 7c1, the scraping plate 7d, the air quantity regulating valve 7d1, the shell 7d2, the regulating plate 7d3, the air hole 7d4 and the tongue plate;
8. support beam 8', support beam B;
9a, a door-shaped seal 9b and an L-shaped seal;
10. a riding wheel;
11. an oil cylinder A11B and an oil cylinder B;
12. and (3) a bracket.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and unless otherwise stated, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.
Example 1
As shown in the figure, the invention provides a liquid steel slag dry processing device, which comprises: the slag pot 1, the electric trolley 2, the tundish 3, the ejector 4, the cooler 5 and the bracket 12; the cooler 5 is arranged at the upper part of the bracket 12; the cooler 5 includes: a shell, a horizontal material bed 7; the horizontal material bed 7 is arranged on the upper part of the bracket 12 through a riding wheel 10; the shell covers the upper part of the horizontal material bed 7; the horizontal lathe bed 7 is a self-feeding lathe bed; a tundish 3 is arranged at the inlet end of the cooler 5, and the bottom surface of the tundish 3 forms an included angle of 5 degrees with the horizontal plane, so that the liquid steel slag can naturally flow along the bottom inclined plane by virtue of natural gravity and the liquid level pressure difference of the steel slag entering the tundish 3; the lower part of the tundish 3 is provided with a slag flowing groove 31, and the slag flowing groove 31 penetrates through a cooling wall 51 of the cooler 5 and extends into the cooler 5; an electric trolley 2 is arranged on the rack on one side of the inlet end of the cooler 5; the slag pot 1 is arranged on the electric trolley 2, and after moving to the edge of the rack along with the electric trolley 2, the slag is unloaded into the tundish 3; the ejector 4 is arranged at the inlet end of the cooler 5 and positioned at the lower part of the tundish 3, the front port part of the ejector passes through the cooling wall 51 of the cooler 5 and then points to the outlet of the slag flowing groove 31 obliquely upwards, the high-temperature slag flow 6 flowing out of the slag flowing groove 31 is blown to the middle part of the cooler 5, and the jet medium of the ejector 4 is one of the mixture of ambient atmosphere, inert gas, ambient atmosphere and a small amount of liquid water.
The main body of the shell is a cooling wall 51, the cooling wall 51 is a rectangular shell structure with an open bottom and five closed surfaces, and an insulating layer 55 is arranged outside the cooling wall 51; an insulating layer 55 is laid outside the water wall 51 to achieve an insulating effect, thereby improving the thermal efficiency; the upper part of the cooling wall 51 is provided with a high-temperature tuyere 521, a medium-temperature tuyere 522 and a low-temperature tuyere 523; the upper part of the cooling wall 51 is provided with a medium-high temperature steam drum 531 and a medium-low temperature steam drum 532; the middle-high temperature steam pocket 531 is arranged between the high temperature air port 521 and the middle-high temperature air port 522 and communicated with the inside of the cooling wall 51; the middle-low temperature steam pocket 532 is arranged between the middle-temperature air port 522 and the low-temperature air port 523 and is communicated with the inside of the cooling wall 51; a medium-high temperature heat shield 541 and a medium-low temperature heat shield 542 are arranged inside the cooling wall 51; the medium-high temperature heat shield 541 is arranged inside the cooling wall 51 and is positioned between the high-temperature air opening 521 and the medium-temperature air opening 522; the medium-low temperature heat shield 542 is arranged inside the cooling wall 51 and is positioned between the medium-temperature tuyere 522 and the low-temperature tuyere 523.
The self-feeding lathe bed comprises: the device comprises a lathe bed, a supporting structure, a sealing structure and an oil cylinder A11; the bed body is composed of a plurality of rows of grid plate groups 7b, and each row of grid plate group 7b is formed by connecting a plurality of unit grid plates 7a in series; the unit grid plate 7a is made of a common carbon steel plate by adopting a cold-working punch forming process; the support structure includes: support beam 8 and support beam B8'; the support beam 8 and the support beam B8' are made of common carbon steel plates; the seal structure includes: a gate seal 9a and an L-seal 9 b; the grate plate group 7b is fixedly arranged at the upper part of a support beam 8, and the support beam 8 is arranged along the length direction of the cooler 5; the supporting beam 8 is arranged on a riding wheel 10 at the top of the bracket 12; l-shaped seals 9b are symmetrically arranged on two sides of the supporting beam 8; the bottom and two sides of the grate plate group 7b are wrapped and supported by the support beam 8 and the L-shaped seal 9 b; the gate-shaped seal 9a is arranged at the upper part between the two adjacent groups of the grate plate groups 7b, the gate-shaped seal 9a is arranged along the length direction of the cooler 5, and two ends of the gate-shaped seal are fixed on the cooler 5 to seal the gap between the two adjacent groups of the grate plate groups 7 b; the oil cylinders A11 are in multiple groups, and each group of oil cylinders A11 is matched and assembled with one group of grate plate groups 7 b; the cylinder body of the oil cylinder A11 is obliquely fixed on the bracket 12, the piston rod is hinged with the bottom of the supporting beam 8, the expansion of the piston rod drives a group of grate plate groups 7b to move back and forth along the length direction of the cooler 5, and the steel slag on the lathe bed is actively pushed to the outlet of the cooler 5; the self-feeding bed body adopts a self-feeding mode, and the power for pushing the steel slag particles B62 on the bed body from the slag inlet to the slag outlet is provided by the oil cylinder 11; the oil cylinder 11 drives the supporting beam 8 to reciprocate, so that the steel slag particles B62 are pushed to move towards the outlet in the continuous cooling process.
The unit grate plate 7a includes: the middle air-permeable grate plate 7a1 and the surrounding baffle plate 7a 2; the peripheral baffle 7a2 is a rectangular frame structure with an open top; the middle air-permeable grate plate 7a1 is arranged inside the surrounding baffle 7a 2; the edge of the surrounding baffle 7a2 is higher than the upper end surface of the middle ventilating grate plate 7a1, so that a concave structure is formed.
The bottom of the surrounding baffle 7a2 and the support beam 8 are provided with vent holes; an air volume adjusting valve 7d is arranged at the lower part of the vent hole of the supporting beam 8; the air volume adjusting valve 7d includes: a shell 7d1, an adjusting plate 7d2, a wind hole 7d3 and a tongue plate 7d 4; the shell 7d1 is a rectangular structure with through top and bottom, the top of the shell is fixedly arranged at the bottom of the support beam 8 and communicated with the vent hole on the support beam 8, and the bottom of the shell is connected with an external air supply system; the adjusting plate 7d2 is arranged inside the shell 7d1, and the top of the adjusting plate is hung on a shaft inside the shell 7d 1; the adjusting plate 7d2 is provided with an air hole 7d 3; the top end of the tongue plate 7d4 is fixedly arranged on the upper surface of the adjusting plate 7d 2.
The air quantity balance regulating valve 7d is fixed below the grate plate group 7b, the supply and regulation of the cooling air quantity of the horizontal cooling bed 7 are automatically completed by the air quantity balance regulating valve 7d, the cooling air quantity of the grate plate 7a of the supply unit is automatically regulated according to the resistance formed by the steel slag particles 62 and the steel slag particles 63 on the grate plate group 7b, and the action principle is as follows: when the steel slag particles 6263 cover the air-permeable grate plate 7a to form a certain resistance, the air flow is divided into two parts when the cooling air passes through the air volume balance adjusting valve 7d from bottom to top, and one part flows through a channel between the adjusting valve plate 7d2 and the shell 7d 1; the other part passes through the channel between the shell 7d1 and the tongue plate 7d 4; when the resistance is increased or reduced, the included angle between the adjusting valve plate 7d2 and the housing 7d1 can be automatically adjusted according to the resistance of the steel slag layer.
The working mode of the liquid steel slag dry processing device is as follows:
A. transferring steel slag: liquid raw slag obtained at the steelmaking end point is transported to a treatment span through a slag pot 1, lifted to a trolley support by a casting crane and placed on an electric trolley 2, and the electric trolley 2 is started to smoothly move to a tundish 3 to automatically stop running; the electric trolley 2 is lifted by the slag turning mechanism to slowly pour the liquid steel slag in the slag pot 1 into the tundish 3; the slag liquid entering the tundish 3 forms an included angle of 5 degrees between the bottom surface of the inclined plane at the bottom of the tundish 3 and the horizontal plane, so that the liquid steel slag can naturally flow along the inclined plane at the bottom and flow into the cooler 5 by means of natural gravity and the liquid level pressure difference of the steel slag entering the tundish 3;
B. steel slag lasing: the ejector 4 fixed at the bottom right below the tundish 3 ejects the cooling medium to the right front to flow out a high-temperature liquid slag flow 6; ejecting the liquid slag flow 6 to the direction of a horizontal material bed 7; the jet medium of the ejector 4 can be ambient atmosphere, can also be other inert gases such as argon, can also adopt the ambient atmosphere and add a small amount of liquid water mixture form, do so first in order to reduce the temperature of the steel slag granule A61, second dispel the calcium oxide that is added more in high-temperature slag stream 6 and steel slag granule A61 because of the slagging process of steelmaking, strengthen and dispel the function of free calcium oxide, free magnesia harmful component, this part of liquid water is met the liquid slag stream 6 instant vaporization of high temperature after going out with the jet current of ambient air together, make the liquid slag stream 6 of high temperature cut, the broken effect is better, and the temperature is further reduced; the parameters of the jet device are adjusted to obtain steel slag particles B62 with the particle size less than or equal to 10mm, the adjustment of the steel slag particles B62 in the range of 10mm can be realized, the steel slag particles less than or equal to 10mm do not need to remain the traditional steel slag secondary treatment process, and the dust pollution in the traditional secondary treatment link is thoroughly cured; meanwhile, the range of the steel slag particles B62 is adjustable within the range of 10mm, so that the energy consumption and dust pollution in the three treatment processes are reduced; compared with the traditional hot stuffiness, pressure hot stuffiness and roller method, the magnetic separation method is more convenient for separating the tailings and the slag steel and is easy to realize; because the granularity of the steel slag particles B62 obtained by adopting the liquid-melt slag flow jet technology is uniform and adjustable within the range of 10mm, and the particle shape is regular and is circular or elliptical, the treatment process is optimized, the flow is shortened, the occupied land is saved, the secondary treatment link is cancelled, and the investment is reduced;
C. cutting a slag flow: the high-temperature liquid slag flow 6 is cut into slices and strips under the cutting action of the jet flow medium, and then is cut into smaller slice strips when meeting air resistance in the forward flying process along with the jet flow medium, then the slag liquid vibrates, and further is crushed and sucked into spherical steel slag particles A61, the spherical steel slag particles A61 continuously fly forwards in a parabolic track under the action of the jet flow medium, the surface of the steel slag particles A61 is rapidly cooled from a liquid phase to a solid phase in a very short time, the high-temperature steel slag is primarily cooled, but the core part of the high-temperature steel slag is still possibly in a liquid phase state; finally falls on the horizontal material bed 7;
D. cooling wall heat exchange: in the process of the step C, the high-temperature liquid slag flow 6 and the steel slag particles A61 flying in the air continuously release radiation heat to be received by the water wall 51 of the cooler 5 for heating the cooling medium in the water wall 51, and the obtained cooling medium steam is stored in the medium-high temperature steam drum 531 after evaporation;
E. material bed heat dissipation: the steel slag particles B62 falling onto the horizontal material bed 7 are in a stacking state and still have higher temperature, and heat can be continuously released in the process of pushing the horizontal material bed 7 towards the slag outlet, and the part of heat is also received by the water-cooled wall 51 of the cooler 5 and is used for heating the cooling medium in the water-cooled wall 51 to evaporate, so that the obtained cooling medium steam is stored in the medium-high temperature steam pocket 531 and the medium-low temperature steam pocket 532;
F. cooling and solidifying: after the steel slag particles A61 fall onto the horizontal material bed 7, steel slag particles B62 are formed, the steel slag particles B62 cover the middle air-permeable grate plate 7a, and then are sprayed by a cooling medium which is upwards sprayed from the lower part of the middle air-permeable grate plate 7a and forms an angle of 45-60 degrees with the horizontal direction, so that the steel slag particles B62 are continuously cooled; under the reciprocating pushing action of the horizontal material bed 7, the steel slag particles B62 are further cooled, the depth of the steel slag particles B is deeper and deeper, the liquid phase part is less and less, and the steel slag particles B62 are solidified into a shell until the steel slag particles B are completely solidified into a solid state at normal temperature;
G. flue gas absorption: in the step F, the steel slag particles B62 are cooled, the air is heated to obtain hot flue gas, then the steel slag waste heat is separated out to appear in the form of hot flue gas, and the hot flue gas is pumped out through a high-temperature air port 521, a medium-temperature air port 522 and a low-temperature air port 523 respectively to obtain the steel slag waste heat; the space above the horizontal cooling bed 7 and inside the cooler 5 is divided into a high-temperature area, a medium-temperature area and a low-temperature area by the medium-high temperature heat shield 541 and the medium-low temperature heat shield 542, so that high-temperature flue gas, medium-temperature flue gas and low-temperature flue gas can be respectively recovered according to the temperature range of the hot flue gas, and the waste heat recovery efficiency is effectively improved;
H. pushing slag: and pushing steel slag particles B62 to a steel slag outlet by adopting a self-feeding mode, outputting the steel slag particles to a cooler 5, and entering the next working procedure.
The bed body adopted by the self-feeding mode is a self-moving feeding mode and is divided into the following modes:
mode A: all the grate plate groups 7b are pushed out towards the steel slag outlet at the same time at intervals of T 0 Time, first row plate group 7b is withdrawn; at interval T0, the second row of grate plate groups 7b is withdrawn, at interval T0, the third row of grate plate groups 7b is withdrawn; until all grate plate groups 7b are withdrawn, repeat the above-mentioned action;
mode B: the first grate plate group 7b is pushed out towards the steel slag outlet direction at an interval T 0 In time, the second row of grid plate groups 7b are pushed out towards the steel slag outlet direction; at the time interval of T0, the third row of grate plate groups 7b is pushed out in the steel slag spraying direction; until all grate plate groups 7b are pushed out, at interval T0, all grate plate groups 7b are withdrawn simultaneously, at interval T0, and the above actions are repeated;
mode C: the first grate plate group 7b is pushed out towards the steel slag outlet direction at an interval T 0 Time, first row plate group 7b is withdrawn; interval T 0 At the time, the second row of grid plate groups 7b is pushed out, the interval T 0 Time, the second row of grate plate groups 7b is withdrawn, · · and so on until all grate plate groups 7b are withdrawn, repeating the above actions;
the self-feeding mode can be used for conveying steel slag in other motion modes besides the conveying mode;
example 2
As shown in the figure, the invention provides a liquid steel slag dry processing device, which comprises: the slag pot 1, the electric trolley 2, the tundish 3, the ejector 4, the cooler 5 and the bracket 12; the cooler 5 is arranged at the upper part of the bracket 12; the cooler 5 includes: a shell, a horizontal material bed 7; the horizontal material bed 7 is arranged on the upper part of the bracket 12 through a riding wheel 10; the shell is covered on the upper part of the horizontal material bed 7; the horizontal bed body 7 is a feeding bed body; the inlet end of the cooler 5 is provided with a tundish 3, and the bottom surface of the tundish 3 forms an included angle of 5 degrees with the horizontal plane, so that the liquid steel slag can naturally flow along the bottom inclined plane by virtue of natural gravity and the liquid level pressure difference of the steel slag entering the tundish 3; the lower part of the tundish 3 is provided with a slag flowing groove 31, and the slag flowing groove 31 penetrates through a cooling wall 51 of the cooler 5 and extends into the cooler 5; an electric trolley 2 is arranged on the rack on one side of the inlet end of the cooler 5; the slag pot 1 is arranged on the electric trolley 2, and after moving to the edge of the rack along with the electric trolley 2, the slag is discharged into the tundish 3; the ejector 4 is arranged at the inlet end of the cooler 5 and positioned at the lower part of the tundish 3, the front port part of the ejector passes through the cooling wall 51 of the cooler 5 and then points to the outlet of the slag flowing groove 31 obliquely upwards, the high-temperature slag flow 6 flowing out of the slag flowing groove 31 is blown to the middle part of the cooler 5, and the jet medium of the ejector 4 is one of the mixture of ambient atmosphere, inert gas, ambient atmosphere and a small amount of liquid water.
The main body of the shell is a cooling wall 51, the cooling wall 51 is a rectangular shell structure with an open bottom and five closed surfaces, and an insulating layer 55 is arranged outside the cooling wall 51; an insulating layer 55 is laid outside the water wall 51 to achieve an insulating effect and thereby improve the thermal efficiency; the upper part of the cooling wall 51 is provided with a high-temperature air port 521, a medium-temperature air port 522 and a low-temperature air port 523; the upper part of the cooling wall 51 is provided with a medium-high temperature steam drum 531 and a medium-low temperature steam drum 532; the middle-high temperature steam pocket 531 is arranged between the high temperature air opening 521 and the middle-high temperature air opening 522 and is communicated with the inside of the cooling wall 51; the medium-low temperature steam pocket 532 is arranged between the medium-temperature tuyere 522 and the low-temperature tuyere 523 and communicated with the interior of the cooling wall 51; a medium-high temperature heat shield 541 and a medium-low temperature heat shield 542 are arranged inside the cooling wall 51; the middle-high temperature heat shield 541 is arranged inside the cooling wall 51 and is positioned between the high temperature air opening 521 and the middle-high temperature air opening 522; the medium-low temperature heat shield 542 is arranged inside the cooling wall 51 and is positioned between the medium-temperature tuyere 522 and the low-temperature tuyere 523.
The feeding bed body comprises: the device comprises a lathe bed, a supporting structure, a sealing structure and a steel slag pushing device; the bed body is composed of a plurality of rows of grid plate groups 7b, and each row of grid plate group 7b is formed by connecting a plurality of unit grid plates 7a in series; the unit grid plate 7a is made of a common carbon steel plate by adopting a cold-working punch forming process; the support structure includes: support beam 8 and support beam B8'; the support beam 8 and the support beam B8' are made of common carbon steel plates; the seal structure includes: a gate seal 9a and an L-seal 9 b; l-shaped seals 9b are symmetrically arranged on two sides of the supporting beam 8; the bottom and two sides of the grate plate group 7b are wrapped and supported by the support beam 8 and the L-shaped seal 9 b; the support beams B8 'are arranged in the upper part between two adjacent groups of grate plate groups 7B, the support beams B8' are arranged in the length direction of the cooler 5; the upper part of the supporting beam B8' is provided with a gate-shaped seal 9a, and the gate-shaped seal 9a seals the gap between two adjacent groups of grate plate groups 7B; the steel slag pushing devices are multiple groups and made of heat-resistant cast steel, and each group of steel slag pushing devices comprises: an oil cylinder B11a, a steel slag conveyor 7c and a scraper 7c 1; the steel slag conveyor 7c is arranged at the upper part of the door-shaped seal 9a, and two sides of the steel slag conveyor are respectively and horizontally provided with a scraper 7c 1; the cylinder body of the oil cylinder B11a is obliquely fixed on the bracket 12, the piston rod is hinged with the bottom of the supporting beam B8', the piston rod stretches and retracts to drive the steel slag pushing device to move back and forth along the length direction of the cooler 5, and the steel slag falling on the lathe bed is pushed towards the outlet direction of the cooler 5; the other feeding bed body adopts the other feeding mode, and the power for pushing the steel slag particles B62 on the bed body from the slag inlet to the slag outlet is provided by an oil cylinder B11 a; the oil cylinder B11a drives the support beam 8 'to realize reciprocating motion, and the scraper 7c1 on the support beam 8' pushes the steel slag particles B62 to move towards the outlet direction in the continuous cooling process.
The unit louver 7a includes: a middle air-permeable grate plate 7a1 and a peripheral baffle 7a 2; the peripheral baffle 7a2 is a rectangular frame structure with an open top; the middle air-permeable grate plate 7a1 is arranged inside the peripheral baffle 7a 2; the edge of the surrounding baffle 7a2 is higher than the upper end surface of the middle ventilating grate plate 7a1, so that a concave structure is formed.
The bottom of the surrounding baffle 7a2 and the support beam 8 are provided with vent holes; an air volume adjusting valve 7d is arranged at the lower part of the vent hole of the supporting beam 8; the air volume adjusting valve 7d includes: a shell 7d1, an adjusting plate 7d2, a wind hole 7d3 and a tongue plate 7d 4; the shell 7d1 is a rectangular structure with through top and bottom, the top of the shell is fixedly arranged at the bottom of the support beam 8 and communicated with the vent holes on the support beam 8, and the bottom is connected with an external air supply system; the adjusting plate 7d2 is arranged inside the shell 7d1, and the top of the adjusting plate is hung on a shaft inside the shell 7d 1; the adjusting plate 7d2 is provided with an air hole 7d 3; the top end of the tongue plate 7d4 is fixedly arranged on the upper surface of the adjusting plate 7d 2.
The air quantity balance regulating valve 7d is fixed below the grate plate group 7b, the supply and regulation of the cooling air quantity of the horizontal cooling bed 7 are automatically completed by the air quantity balance regulating valve 7d, the cooling air quantity of the grate plate 7a of the supply unit is automatically regulated according to the resistance formed by the steel slag particles 62 and the steel slag particles 63 on the grate plate group 7b, and the action principle is as follows: when the steel slag particles 6263 cover the air-permeable grate plate 7a to form a certain resistance, the air flow is divided into two parts when the cooling air passes through the air volume balance adjusting valve 7d from bottom to top, and one part flows through a channel between the adjusting valve plate 7d2 and the shell 7d 1; the other part passes through the channel between the shell 7d1 and the tongue plate 7d 4; when the resistance is increased or reduced, the included angle between the adjusting valve plate 7d2 and the housing 7d1 can be automatically adjusted according to the resistance of the steel slag layer.
The working mode of the liquid steel slag dry processing device is as follows:
A. transferring steel slag: liquid raw slag obtained at the steelmaking end point is transported to a treatment span through a slag pot 1, lifted to a trolley support by a casting crane and placed on an electric trolley 2, and the electric trolley 2 is started to smoothly move to a tundish 3 to automatically stop running; the electric trolley 2 is lifted by the slag turning mechanism to slowly pour the liquid steel slag in the slag pot 1 into the tundish 3; the slag liquid entering the tundish 3 forms an included angle of 5 degrees between the bottom surface of the inclined plane at the bottom of the tundish 3 and the horizontal plane, so that the liquid steel slag can naturally flow along the inclined plane at the bottom and flow into the cooler 5 by means of natural gravity and the liquid level pressure difference of the steel slag entering the tundish 3;
B. steel slag lasing: the ejector 4 fixed at the bottom right below the tundish 3 ejects cooling medium to the right front to flow out high-temperature liquid slag flow 6; ejecting the liquid slag flow 6 to the direction of a horizontal material bed 7; the jet medium of the ejector 4 can be ambient atmosphere, can also be other inert gases such as argon, can also adopt the ambient atmosphere and add a small amount of liquid water mixture form, do so first in order to reduce the temperature of the steel slag granule A61, second dispel the high-temperature slag flow 6 and steel slag granule A61 because of steel-making slagging process add calcium oxide more, strengthen and dispel the function of the harmful component of free calcium oxide, free magnesium oxide, this part of liquid water meets the high-temperature liquid slag flow 6 and vaporizes instantaneously after the jet flow goes out together with ambient air, make the high-temperature liquid slag flow 6 cut, the broken effect is better, and the temperature is further reduced; the parameters of the jet device are adjusted to obtain steel slag particles B62 with the particle size less than or equal to 10mm, the steel slag particles B62 can be adjusted within the range of 10mm, and the steel slag particles are less than or equal to 10mm, so that the traditional steel slag secondary treatment process is not required to be reserved, and the dust pollution in the traditional secondary treatment process is thoroughly cured; meanwhile, the range of the steel slag particles B62 is adjustable within the range of 10mm, so that the energy consumption and dust pollution in the three treatment processes are reduced; compared with the traditional hot stuffiness, pressure hot stuffiness and roller method, the magnetic separation method is more convenient for separating the tailings and the slag steel and is easy to realize; because the granularity of the steel slag particles B62 obtained by adopting the liquid-state slag flow jet technology is uniform and adjustable within the range of 10mm, and the particles are regular and are circular or elliptical, the treatment process is optimized, the flow is shortened, the occupied land is saved, the secondary treatment link is cancelled, and the investment is reduced;
C. cutting a slag flow: the high-temperature liquid slag flow 6 is cut into slices and strips under the cutting action of the jet flow medium, and then is cut into smaller slice strips under the air resistance in the forward flying process along with the jet flow medium, and then the slag liquid vibrates, so that the steel slag particles A61 are crushed and sucked into spherical steel slag particles A61, the spherical steel slag particles A61 continuously fly forwards in a parabolic track under the action of the jet flow medium, the surface of the steel slag particles A61 is rapidly cooled from a liquid phase to a solid phase in a very short time, the high-temperature steel slag is primarily cooled, but the core part of the high-temperature steel slag is still possibly in a liquid phase state; finally falls on the horizontal material bed 7;
D. cooling wall heat exchange: in the process of the step C, the high-temperature liquid slag flow 6 and the steel slag particles A61 flying in the air continuously release radiant heat to be received by the water wall 51 of the cooler 5, so as to heat the cooling medium in the water wall 51, and the cooling medium steam obtained by evaporation is stored in the medium-high temperature steam pocket 531;
E. material bed heat dissipation: the steel slag particles B62 falling onto the horizontal material bed 7 are in a stacking state and still have higher temperature, and heat can be continuously released in the process of pushing the horizontal material bed 7 towards the slag outlet, and the part of heat is also received by the water-cooled wall 51 of the cooler 5 and is used for heating the cooling medium in the water-cooled wall 51 to evaporate, so that the obtained cooling medium steam is stored in the medium-high temperature steam pocket 531 and the medium-low temperature steam pocket 532;
F. cooling and solidifying: after the steel slag particles A61 fall on the horizontal material bed 7, steel slag particles B62 are formed, the steel slag particles B62 cover the middle air-permeable grate plate 7a, and then the steel slag particles B62 are continuously cooled by the spraying of a cooling medium which is upwards sprayed from the lower part of the middle air-permeable grate plate 7a and forms an angle of 45-60 degrees with the horizontal direction; under the reciprocating pushing action of the horizontal material bed 7, the steel slag particles B62 are further cooled, the depth of the steel slag particles B is deeper and deeper, the liquid phase part is less and less, and the steel slag particles B62 are solidified into a shell until the steel slag particles B are completely solidified into a solid state at normal temperature;
G. flue gas absorption: in the step F, the steel slag particles B62 are cooled, the air is heated to obtain hot flue gas, then the steel slag waste heat is separated out to appear in the form of hot flue gas, and the hot flue gas is pumped out through a high-temperature air port 521, a medium-temperature air port 522 and a low-temperature air port 523 respectively to obtain the steel slag waste heat; the middle-high temperature heat shield 541 and the middle-low temperature heat shield 542 divide the space above the horizontal cooling bed 7 and below the cooler 5 into a high temperature area, a middle temperature area and a low temperature area, so that high temperature flue gas, middle temperature flue gas and low temperature flue gas can be respectively recovered according to the temperature range of the hot flue gas, and the waste heat recovery efficiency is effectively improved;
H. pushing slag: and pushing the steel slag particles B62 to a steel slag outlet by adopting one of other feeding modes, outputting the steel slag particles B62 to a cooler 5, and entering the next working procedure.
The feeding mode is that the bed body is fixed, and the conveying mode depends on the movement of the steel slag conveyor 7c, and is divided into the following modes:
mode A: all steel slag conveyors 7c push out towards the steel slag outlet at the same time at intervals of T 0 In time, the first steel slag conveyor 7c is withdrawn; at the interval of T0, the second steel slag conveyor 7c is withdrawn, and at the interval of T0, the third steel slag conveyor 7c is withdrawn; until the whole steel slag is conveyedThe machine 7c is withdrawn and the above operation is repeated;
mode B: the first steel slag conveyor 7c pushes out towards the steel slag outlet at an interval T 0 In time, the second steel slag conveyor 7c pushes the steel slag towards the steel slag outlet; at the time interval of T0, the steel slag spraying direction of the third steel slag conveyor 7c is pushed out; and so on until all the steel slag conveyors 7c are pushed out at an interval of T0 time, all the steel slag conveyors 7c are pulled back at the same time at an interval of T0 time, and the actions are repeated;
mode C: the first steel slag conveyor 7c pushes out towards the steel slag outlet at an interval T 0 In time, the first steel slag conveyor 7c is withdrawn; interval T 0 At a time interval T, the second steel slag conveyor 7c is pushed out toward the steel slag outlet 0 Time, the second steel slag conveyor 7c is withdrawn; interval T 0 At the time, the third steel slag conveyor 7c is pushed out towards the steel slag outlet at an interval T 0 Time, the third steel slag conveyor 7c is withdrawn; the process is repeated until all the steel slag conveyors 7c are withdrawn;
besides the above conveying modes, other feeding modes can also be used for conveying the steel slag in other motion modes.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. A liquid steel slag dry processing device comprises: the slag ladle furnace comprises a slag ladle (1), an electric trolley (2), a tundish (3), an ejector (4), a cooler (5) and a bracket (12); the cooler (5) is arranged at the upper part of the bracket (12); a tundish (3) is arranged at the inlet end of the cooler (5), and the bottom surface of the tundish (3) forms an included angle of 5 degrees with the horizontal plane; a slag flowing groove (31) is formed in the lower portion of the tundish (3), and the slag flowing groove (31) penetrates through a cooling wall (51) of the cooler (5) and extends into the cooler (5); an electric trolley (2) is arranged on the rack on one side of the inlet end of the cooler (5); the slag pot (1) is arranged on the electric trolley (2); the ejector (4) is arranged at the inlet end of the cooler (5) and is positioned at the lower part of the tundish (3), the front port part of the ejector penetrates through a cooling wall (51) of the cooler (5) and then points to the outlet of the slag flowing groove (31) obliquely upwards, the high-temperature liquid slag flow (6) flowing out of the slag flowing groove (31) is blown to the middle part of the cooler (5), and the jet medium of the ejector (4) is one of the mixture of ambient atmosphere, inert gas, ambient atmosphere and a small amount of liquid water; the method is characterized in that:
the cooler (5) comprises: a shell and a horizontal material bed (7); the horizontal material bed (7) is arranged on the upper part of the bracket (12) through a riding wheel (10); the shell is covered on the upper part of the horizontal material bed (7);
the main body of the shell is a cooling wall (51), the cooling wall (51) is a rectangular shell structure with an open bottom and five closed surfaces, and a heat-insulating layer (55) is arranged outside the cooling wall (51);
the upper part of the cooling wall (51) is provided with a high-temperature tuyere (521), a medium-temperature tuyere (522) and a low-temperature tuyere (523);
the upper part of the cooling wall (51) is provided with a medium-high temperature steam drum (531) and a medium-low temperature steam drum (532); the middle-high temperature steam pocket (531) is arranged between the high temperature air port (521) and the middle temperature air port (522) and is communicated with the inside of the cooling wall (51); the middle-low temperature steam pocket (532) is arranged between the middle-temperature air port (522) and the low-temperature air port (523) and is communicated with the inside of the cooling wall (51);
a medium-high temperature heat shield (541) and a medium-low temperature heat shield (542) are arranged inside the cooling wall (51); the medium-high temperature heat shield (541) is arranged inside the cooling wall (51) and is positioned between the high-temperature air port (521) and the medium-temperature air port (522); the medium-low temperature heat shield (542) is arranged inside the cooling wall (51) and is positioned between the medium-temperature tuyere (522) and the low-temperature tuyere (523);
the horizontal material bed (7) is divided into: the self-feeding bed body and the other feeding bed bodies;
the self-feeding lathe bed comprises: the device comprises a lathe bed, a supporting structure, a sealing structure and an oil cylinder A (11);
the bed body is composed of a plurality of rows of grid plate groups (7 b), and each row of grid plate group (7 b) is formed by connecting a plurality of unit grid plates (7 a) in series; the unit grid plate 7a is made of a common carbon steel plate by adopting a cold-working punch forming process;
the support structure comprises: a support beam (8);
the supporting beam (8) is made of a common carbon steel plate;
the sealing structure comprises: a gate seal (9 a) and an L-seal (9 b);
the grate plate group (7 b) is fixedly arranged at the upper part of the supporting beam (8), and the supporting beam (8) is arranged along the length direction of the cooler (5); the supporting beam (8) is arranged on a riding wheel (10) at the top of the bracket (12);
l-shaped seals (9 b) are symmetrically arranged on two sides of the supporting beam (8); the bottom and two sides of the grate plate group (7 b) are wrapped and supported by the supporting beam (8) and the L-shaped seal (9 b);
the gate-shaped seal (9 a) is arranged at the upper part between two adjacent groups of grate plate groups (7 b), the gate-shaped seal (9 a) is arranged along the length direction of the cooler (5), and two ends of the gate-shaped seal are fixed on the cooler (5) to seal the gap between the two adjacent groups of grate plate groups (7 b);
the oil cylinders A (11) are in multiple groups, and each group of oil cylinders A (11) is matched and assembled with one group of grid plate groups (7 b); the cylinder body of the oil cylinder A (11) is obliquely fixed on the support (12), the piston rod is hinged with the bottom of the supporting beam (8), the piston rod stretches and retracts to drive a group of grate plate groups (7 b) to move back and forth along the length direction of the cooler (5), and steel slag on the lathe bed is actively pushed to an outlet of the cooler (5);
the self-feeding bed body adopts a self-feeding mode, and power for pushing steel slag particles B (62) on the bed body from a slag inlet to a slag outlet is provided by an oil cylinder A (11); the oil cylinder A (11) drives the supporting beam (8) to realize reciprocating motion so as to push the steel slag particles B (62) to move towards the outlet direction in the continuous cooling process;
other pay-off lathe beds include: the device comprises a lathe bed, a supporting structure, a sealing structure and a steel slag pushing device;
the machine body consists of a plurality of rows of grid plate groups (7 b), and each row of grid plate group (7 b) is formed by connecting a plurality of unit grid plates (7 a) in series; the unit grid plate 7a is made of a common carbon steel plate by adopting a cold-working punch forming process;
the support structure comprises: a support beam (8) and a support beam B (8'); the supporting beam (8) and the supporting beam B (8') are made of common carbon steel plates;
the seal structure includes: a gate seal (9 a) and an L-seal (9 b);
l-shaped seals (9 b) are symmetrically arranged on two sides of the supporting beam (8); the bottom and two sides of the grate plate group (7 b) are wrapped and supported by the supporting beam (8) and the L-shaped seal (9 b);
the supporting beams B (8 ') are arranged at the upper part between two adjacent groups of grate plate groups (7B), and the supporting beams B (8') are arranged along the length direction of the cooler (5);
the upper part of the supporting beam B (8') is provided with a gate-shaped seal (9 a), and the gate-shaped seal (9 a) seals gaps between two adjacent groups of grid plate groups (7B);
the steel slag pushing devices are multiple groups and are made of heat-resistant cast steel, and each group of steel slag pushing devices comprises: a cylinder B (11 a), a steel slag conveyor (7 c) and a scraper (7 c 1); the steel slag conveyor (7 c) is arranged at the upper part of the door-shaped seal (9 a), and two sides of the steel slag conveyor are respectively and horizontally provided with a scraper (7 c 1); the cylinder body of the oil cylinder B (11 a) is obliquely fixed on the support (12), the piston rod is hinged with the bottom of the supporting beam B (8'), the piston rod stretches and retracts to drive the steel slag pushing device to move back and forth along the length direction of the cooler (5), and steel slag falling on the lathe bed is pushed towards the outlet direction of the cooler (5);
the other feeding bed body adopts the other feeding mode, and the power for pushing the steel slag particles B (62) on the bed body from the slag inlet to the slag outlet is provided by an oil cylinder B (11 a); the oil cylinder B (11 a) drives the supporting beam B (8 ') to reciprocate, and the scraper (7 c 1) on the supporting beam B (8') pushes the steel slag particles B (62) to move towards the outlet direction in the continuous cooling process.
2. The liquid steel slag dry treatment device according to claim 1, wherein the unit grate plate (7 a) comprises: a middle air-permeable grate plate (7 a 1) and a peripheral baffle plate (7 a 2);
the peripheral baffle (7 a 2) is a rectangular frame structure with an open top;
the middle air-permeable grate plate (7 a 1) is arranged inside the surrounding baffle plate (7 a 2);
the edge of the peripheral baffle (7 a 2) is higher than the upper end surface of the middle air-permeable grate plate (7 a 1) to form a concave structure.
3. The liquid steel slag dry processing device according to claim 2, wherein the bottom of the surrounding baffle plate (7 a 2) and the support beam (8) are provided with vent holes; an air volume adjusting valve (7 d) is arranged at the lower part of the vent hole of the support beam (8);
the air volume adjusting valve (7 d) comprises: a shell (7 d 1), an adjusting plate (7 d 2), an air hole (7 d 3) and a tongue plate (7 d 4);
the shell (7 d 1) is of a vertically through rectangular structure, the top of the shell is fixedly arranged at the bottom of the support beam (8) and communicated with the vent holes on the support beam (8), and the bottom of the shell is connected with an external air supply system;
the adjusting plate (7 d 2) is arranged inside the shell (7 d 1), and the top of the adjusting plate is hung on a shaft inside the shell (7 d 1);
the adjusting plate (7 d 2) is provided with an air hole (7 d 3);
the top end of the tongue plate (7 d 4) is fixedly arranged on the upper surface of the adjusting plate (7 d 2).
4. The operation of the liquid steel slag dry treatment device according to any one of claims 1 to 3, wherein the operation is as follows:
A. transferring steel slag: liquid raw slag obtained at the steelmaking end point is transported to a treatment span through a slag pot (1), is lifted to a trolley bracket by a casting crane and is placed on an electric trolley (2), and the electric trolley (2) is started to slowly move to a tundish (3) to automatically stop running; the electric trolley (2) is provided with a slag turning mechanism to slowly pour the liquid steel slag in the slag pot (1) into the tundish (3); the slag liquid entering the tundish (3) flows into the cooler (5) under the action of the inclined angle of the bottom inclined plane of the tundish (3);
B. steel slag lasing: a jet device (4) fixed at the bottom right below the tundish (3) jets a cooling medium to the right front to flow out a high-temperature liquid slag flow (6); ejecting the high-temperature liquid slag flow (6) to the direction of a horizontal material bed (7);
C. cutting a slag flow: the high-temperature liquid slag flow (6) is cut into slices and strips under the cutting action of the jet flow medium, and then the high-temperature liquid slag flow meets air resistance in the forward flying process along with the jet flow medium to be cut into smaller slice strips, and then the slag liquid vibrates along with the slices and strips to be broken and sucked into spherical steel slag particles A (61) and finally fall onto a horizontal material bed (7);
D. cooling wall heat exchange: in the process of the step C, the high-temperature liquid slag flow (6) and the steel slag particles A (61) flying in the air continuously release radiant heat to be received by a cooling wall (51) of the cooler (5) for heating a cooling medium in the cooling wall (51), and the cooling medium steam obtained through evaporation is stored in a medium-high temperature steam pocket (531);
E. material bed heat dissipation: the steel slag particles B (62) falling onto the horizontal material bed (7) are in a stacked state and still have higher temperature, and heat can be continuously released in the process that the horizontal material bed (7) is pushed towards the slag outlet, and the part of heat is also received by the cooling wall (51) of the cooler (5) and is used for heating a cooling medium in the cooling wall (51) to be evaporated, so that the obtained cooling medium steam is stored in a medium-high temperature steam pocket (531) and a medium-low temperature steam pocket (532);
F. cooling and solidifying: after falling onto the horizontal material bed (7), the steel slag particles A (61) form steel slag particles B (62), the steel slag particles B (62) cover the middle air-permeable grate plate (7 a 1), and then are sprayed by a cooling medium which is upwards sprayed from the lower part of the middle air-permeable grate plate (7 a 1) and forms an angle of ˜ 60 degrees with the horizontal direction, so that the steel slag particles B (62) are continuously cooled; under the reciprocating pushing action of the horizontal material bed (7), the steel slag particles B (62) are further cooled, the depth of the steel slag particles B is deeper and deeper, and the liquid phase part is less and less until the steel slag particles B are completely solidified and become a solid state to a normal temperature state;
G. flue gas absorption: in step E, F, the steel slag particles B (62) are cooled, the air is heated to obtain hot flue gas, then the steel slag waste heat is separated out to appear in the form of hot flue gas, and the hot flue gas is respectively pumped out through a high-temperature tuyere (521), a medium-temperature tuyere (522) and a low-temperature tuyere (523) to obtain steel slag waste heat; the middle-high temperature heat shield (541) and the middle-low temperature heat shield (542) divide the space above the horizontal material bed (7) and inside the cooler (5) into a high-temperature area, a middle-temperature area and a low-temperature area, so that high-temperature flue gas, middle-temperature flue gas and low-temperature flue gas can be respectively recovered according to the temperature range of the hot flue gas, and the waste heat recovery efficiency is effectively improved;
H. pushing slag: and pushing the steel slag particles B (62) to a steel slag outlet by adopting one of a self-feeding mode and other feeding modes, outputting the steel slag particles B to a cooler (5), and entering the next procedure.
5. The working mode of the liquid steel slag dry processing device according to claim 4, wherein the bed body adopted in the self-feeding mode is a self-moving feeding mode, and the self-moving feeding mode comprises the following modes:
mode A: all the grate plate groups (7 b) are pushed out towards the steel slag outlet direction at the same time, and the first row of grate plate groups are withdrawn at intervals of T0; at the interval of T0, the grid plate group in the second row is drawn back, at the interval of T0, the grid plate group in the third row is drawn back; repeating the above steps until all the grate plate groups (7 b) are drawn back;
mode B: the first row of grid plate groups are pushed out towards the steel slag outlet direction, and the second row of grid plate groups are pushed out towards the steel slag outlet direction at intervals of T0 time; at the time interval of T0, pushing out the steel slag spraying direction of the third row of grid plate groups; and so on, until all the grate plate groups (7 b) are pushed out, the time is T0, all the grate plate groups (7 b) are withdrawn simultaneously, the time is T0, and the actions are repeated;
mode C: the first row of grid plate groups are pushed out towards the steel slag outlet direction, and the first row of grid plate groups are pulled back at intervals of T0 time; at the interval of T0, pushing out the grid plate group of the second row at the interval of T0, pulling back the grid plate group of the second row at the interval of T0, pushing out the grid plate group of the third row at the interval of T0 and pulling back the grid plate group of the third row; and so on until all grate plate groups (7 b) are withdrawn, and the above action is repeated.
6. The device for the dry treatment of liquid steel slag according to claim 4, wherein the other feeding mode is a fixed bed mode, and the feeding mode depends on the movement of the steel slag conveyor (7 c), and is divided into the following modes:
mode A: all the steel slag conveyors (7 c) are pushed out towards the steel slag outlet at the same time, and the first steel slag conveyor is pulled back at intervals of T0; at the interval of T0, the second steel slag conveyor is withdrawn, at the interval of T0, the third steel slag conveyor is withdrawn; repeating the above operations until all the steel slag conveyors (7 c) are drawn back;
mode B: the first steel slag conveyor is pushed out towards the steel slag outlet, and the second steel slag conveyor is pushed out towards the steel slag outlet at an interval of T0 time; at the time interval of T0, pushing out the steel slag in the third steel slag conveyor; repeating the actions until all the steel slag conveyors (7 c) are pushed out at an interval of T0, simultaneously withdrawing all the steel slag conveyors (7 c) at an interval of T0;
mode C: pushing the first steel slag conveyor out towards the steel slag outlet, and withdrawing the first steel slag conveyor at an interval of T0; at the interval of T0, the second steel slag conveyor is pushed out towards the steel slag outlet, and at the interval of T0, the second steel slag conveyor is pulled back; at the interval of T0, pushing the third steel slag conveyor out towards the steel slag outlet, and at the interval of T0, drawing back the third steel slag conveyor; and repeating the above actions until all the steel slag conveyors (7 c) are drawn back.
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