WO2023168939A1

WO2023168939A1 - Environmentally-friendly ironmaking slag treatment system

Info

Publication number: WO2023168939A1
Application number: PCT/CN2022/124532
Authority: WO
Inventors: 尹晓莹; 苏莉; 朱宁; 范志刚
Original assignee: 中冶赛迪工程技术股份有限公司
Priority date: 2022-03-10
Filing date: 2022-10-11
Publication date: 2023-09-14
Also published as: CN114606352A

Abstract

An environmentally-friendly ironmaking slag treatment system, comprising at least a front water slag runner, a water slag tank and a high-altitude exhaust mechanism, wherein the front water slag runner is used for introducing flushed slag into the water slag tank, the front water slag runner is in a radially closed ring shape, and the front water slag runner is provided with a pressure relief hole for balancing the pressure in the water slag runner; a pressure relief member for opening and closing the pressure relief hole is arranged on the pressure relief hole; the high-altitude exhaust mechanism comprises at least an exhaust chimney for exhausting gas in the water slag tank; the water slag tank is in communication with each of the front water slag runner and the exhaust chimneys; and the water slag tank is provided with a conveying outlet for discharging water slag in the water slag tank. The problem of providing a plurality of exhaust chimneys in a water slag runner facility is solved, and the arrangement number of exhaust chimneys is reduced; in addition, the environmental protection requirement is met, the continuous emission of steam is reduced, the general layout difficulties are reduced, the problem of a large occupied area is solved, and the effects of reducing the cost and improving the efficiency are achieved.

Description

Environmentally friendly ironmaking slag treatment system

Technical field

The invention relates to the field of metallurgical ironmaking processing, and in particular to an environmentally friendly ironmaking slag processing system.

Background technique

The slag ditch is the main process structure for blast furnace slag transportation and an important link in the blast furnace slag production. The layout of the slag ditch generally takes into account the overall layout and the transportation needs of slag. At present, the slag ditch is conventionally arranged in the casting yard. The edge is transported to the slag filtering equipment; an exhaust chimney is set up at the slag granulation point and an exhaust chimney is set up at least 15m along the slag ditch.

The existing problems in the layout of the slag ditch are: the large land requirements and the difficulty in the overall layout; the multiple exhaust chimneys in the slag ditch facility require a large investment; steam is continuously emitted at multiple points, which is not environmentally friendly.

Therefore, in order to solve the above problems, an environmentally friendly ironmaking slag treatment system is needed, which can solve the problem of setting up multiple exhaust chimneys in slag ditch facilities, reduce the layout of exhaust chimneys, meet environmental protection needs, and reduce the continuous consumption of steam. emissions, reduce the difficulty of general layout, solve the need for large floor space, and achieve the effect of reducing costs and increasing efficiency.

Contents of the invention

In view of this, the purpose of the present invention is to overcome the defects in the prior art and provide an environmentally friendly ironmaking slag treatment system that can solve the problem of installing multiple exhaust chimneys in slag ditch facilities, reduce the layout of exhaust chimneys, and at the same time It meets the needs of environmental protection, reduces the continuous emission of steam, reduces the difficulty of general layout, solves the need for large floor space, and achieves the effect of reducing costs and increasing efficiency.

The environmentally friendly ironmaking slag treatment system of the present invention at least includes a front slag ditch, a slag tank and a high-altitude exhaust mechanism. The front slag ditch is used to introduce punched slag into the slag tank. The water slag ditch is in the shape of a radially closed ring. The front water slag ditch has a pressure relief hole for balancing the pressure in the water slag ditch. The pressure relief hole has a pressure relief piece for opening or closing the pressure relief hole. The high-altitude exhaust mechanism at least includes an exhaust chimney for discharging the gas in the slag tank. The slag tank is connected to the front slag ditch and the exhaust chimney respectively. There is only one exhaust chimney. The slag tank has a delivery outlet for discharging the slag inside the slag tank. In this plan, after the slag is punched, it is transported to the slag tank through the front slag ditch. The structure of the front slag ditch is a radially closed ring, so that the front slag ditch does not need to continuously discharge the slag to the outside world when transporting slag. Instead of steam, it is collected and discharged by the exhaust chimney in the water slag tank; and a pressure relief hole is opened in the front water slag tank, and the opening and closing of the pressure relief hole is controlled by the pressure relief part, which solves the problem of water slag during transportation. The problem of "blasting" the water slag. When the water slag is "blasting", the pressure relief part can be controlled so that the pressure relief hole is in an open state and the steam is discharged to the outside world. There is enough space to absorb the energy when the water slag is "blasting". Release to prevent damage to surrounding structures and equipment; the water slag tank conventionally stores 2m-3m of water. This solution is that the water depth in the slag tank is 2m, which meets the conditions for deep water granulation and effectively collects the steam generated by slag punching. At the same time, it can also improve the quality of slag and the safety of slag flushing, and effectively prevent the iron contained in the slag from "shooting"; finally, the steam generated by the granulation of the slag, the steam along the slag trench, and the steam generated by the falling slag all pass through the upper part of the slag trench. The exhaust chimneys are concentrated and emitted at high altitude; and the high-altitude exhaust chimneys exchange heat with the outside, reducing steam emissions along the way and saving system water replenishment. There is only one exhaust chimney in this system, which solves the problem of multiple problems in slag ditch facilities. The issue of setting up an exhaust chimney reduces the layout of the exhaust chimney. At the same time, a pressure relief hole that can be opened or closed is arranged in the front water slag ditch to meet environmental protection needs and reduce the continuous emission of steam, which reduces the difficulty of the overall layout and solves the problem of floor space. Large demand has the effect of reducing costs and increasing efficiency.

Furthermore, it also includes a rear water slag ditch connected to the conveying outlet, and the rear water slag ditch is used to introduce the water slag inside the water slag tank into the bottom filter tank. The integrity of the water slag treatment system is further improved by arranging the rear water slag ditch and bottom filter, so that the water slag is completely processed during the transportation process, and the water slag has high stability and improves safety in subsequent operations.

Further, the bottom wall of the inner cavity of the front water slag trench is connected to the water slag trench obliquely downward from front to back along the water slag flow direction. As shown in the figure, the top of the front water slag ditch is horizontal and closed to form a box culvert structure. The bottom of the front water slag ditch has a slope extending downward from front to back along the direction of water slag flow. The clearance in the front water slag ditch increases with the bottom. The gradient gradually increases, which effectively improves the transportation efficiency of water slag, making water slag have the characteristics of efficient and fast transportation, and increases the efficiency of steam discharge from the front water slag ditch to the water slag tank, and improves the effect of water slag "blasting" Space for force absorption and release.

Further, several of the pressure relief holes are arranged at intervals from front to back along the water slag flow direction, and several of the pressure relief holes are located at the front top of the middle part of the front water slag ditch. Since the clearance in the front water slag ditch gradually increases with the bottom slope, the steam can be directly discharged into the water slag tank at the rear position in the middle of the front water slag ditch, and the water slag is "fired" at the rear position in the middle of the front water slag ditch. Most of the energy is absorbed by the open space and will not affect surrounding facilities, and the steam is discharged vertically from bottom to top. Therefore, several of the pressure relief holes are located at the top of the middle part of the front water slag ditch. Of course, the pressure relief holes It can also be arranged on the side of the front water slag trench to relieve pressure. I will not go into details here. In this plan, two pressure relief holes are provided, and the two pressure relief holes are spaced at the top of the front middle part of the front water slag trench.

Furthermore, it also includes a gas collecting cover connected to the front water slag ditch and the water slag tank, and the gas collecting cover is connected to the top of the rear part of the front water slag ditch. By arranging a gas collecting cover on the top of the middle part of the front slag ditch, the steam located behind the middle part of the front slag ditch can be discharged into the slag tank through a branch, preventing the water level in the slag tank from being discharged due to high water levels. influence and improve steam emission efficiency.

Further, the exhaust chimney is connected to the top of the water slag tank, and the gas collecting hood extends diagonally upward from bottom to top and is connected to the water slag tank. The gas collecting cover extends obliquely backward and is connected to the side wall of the water slag tank. The gas collecting cover is arranged in the middle and rear position of the front water slag ditch and extends obliquely rearwards to form a channel along the water slag flow direction with the front water slag ditch. The expanded "trumpet-shaped" steam collection cavity effectively collects the slag punching steam and finally discharges it through the exhaust chimney; improving steam discharge efficiency.

Further, the rear water slag ditch is in the shape of a radially closed ring, and the rear water slag ditch has a slope surface that improves the water slag discharge efficiency inside the rear water slag ditch. The top slope of the rear slag ditch is the same as the bottom slope, and the clearance in the ditch remains unchanged. It is a closed path arranged obliquely backward. The front end of the rear slag ditch is connected with the water slag ditch, and the rear end of the rear slag ditch is connected with the water slag ditch. The bottom filter tank is connected, and a cover plate is set on the top of the rear slag ditch to form a closed box culvert structure; the rear sludge ditch is placed behind the slag tank, and after deep water granulation in the slag tank and steam collection and discharge from the high-altitude exhaust chimney, this There is less steam and there is no risk of "shooting". The rear slag ditch only adopts a closed structure to prevent steam from leaking out.

Further, a gas collecting pipe is connected to the bottom filter, and the end of the gas collecting pipe is connected to a slag tank or an exhaust chimney. The end of the gas collecting pipe is connected to the slag tank or the high-altitude exhaust chimney; the initial end is connected to the side wall of the bottom filter or the drum gas collecting hood according to the slag filtration process; in this plan, the initial end of the gas collecting pipe is connected to the bottom filter , the steam generated at the final drop of the slag-water mixture is connected through the piping system and finally discharged from the high-altitude exhaust chimney on the slag tank.

Furthermore, the top opening of the water slag tank gradually reduces in diameter from bottom to top and extends upward to form a connecting section. The connecting section is tapered, and the bottom of the exhaust chimney is fixed to the connecting section and communicates with the water slag tank. The exhaust chimney is arranged at the upper part of the slag tank. The upper end of the exhaust chimney extends to the top of the blast furnace. The tapered connecting section is reduced in size from bottom to top, which improves the stability of the exhaust chimney and makes the overall structure stable. High sex.

Further, the pressure relief component is a hinged cover covering the pressure relief hole, and the hinged cover can be movable and arranged in the front water slag ditch with a limited position. The loose-leaf cover can be arranged on the top of the front slag ditch with limited movement. When the internal pressure of the front slag ditch is too high, the loose-leaf cover can be pushed open to connect the pressure relief hole with the outside environment. The internal pressure is relieved. After the pressure relief is completed, the pressure relief hole is closed by resetting the reset piece, so that the front water slag ditch forms a closed box culvert structure.

Further, a reset piece is connected between the loose-leaf cover plate and the front slag ditch. The pressure in the front slag ditch drives the loose-leaf cover plate to separate from the pressure relief hole so that the pressure relief hole opens. The reset piece has a space for the loose-leaf cover to open. The separation of the plate and the pressure relief hole provides an elastic force to relieve the pressure of the front water slag ditch. The reset member also has a restoring force to reset the loose-leaf cover plate to the pressure relief hole and close the pressure relief hole. The reset member is opposite to the hinged shaft of the loose-leaf cover, and is a spring. In this solution, the hinged shaft and the spring of the loose-leaf cover are relatively arranged along the flow direction of the water slag. The arrangement of the reset member makes the loose-leaf cover It has the characteristics of automatic reset, easy selection of components and low cost. During actual construction or use, no reset parts are required, and the loose-leaf cover is manually closed in the pressure relief hole through inspection by inspection personnel.

The beneficial effects of the invention are: the invention discloses an environmentally friendly ironmaking slag treatment system. After the slag is punched, it is transported to the slag tank through the front slag ditch. The structure of the front slag ditch is a radially closed ring. shape, so that the front water slag ditch does not need to continuously discharge steam to the outside world when transporting water slag, but is collected and discharged uniformly in the water slag tank by the exhaust chimney; and a pressure relief hole is opened in the front water slag ditch to release steam through the pressure relief The opening and closing of the pressure relief hole is controlled by the component, which solves the problem of "blasting" of water slag during the transportation process. When the water slag is "blasted", the pressure relief component can be controlled to keep the pressure relief hole in an open state, allowing the discharge to the outside world. Steam, when the water slag is "blasted", there is enough space to absorb and release the energy to prevent damage to surrounding structures and equipment; the water depth in the water slag tank is 2m, which meets the conditions for deep water granulation. In the effective collection of water slag for punching While generating steam, it can also improve the quality of slag and the safety of slag flushing, and effectively prevent the iron in the slag from "shooting off"; finally, the steam generated by the granulation of the slag, the steam along the slag ditch, and the steam generated by the falling slag all pass through the water. The exhaust chimneys at the upper part of the slag tank are concentrated and emitted at high altitude; and the high-altitude exhaust chimneys perform heat exchange with the outside, reducing steam emissions along the way and saving system water replenishment. There is only one exhaust chimney in this system, which solves the problem of water slag ditch The problem of setting up multiple exhaust chimneys in the facility reduces the layout of the exhaust chimneys. At the same time, the front water slag ditch is arranged with a pressure relief hole that can be opened or closed to meet environmental protection needs and reduce the continuous emission of steam, which reduces the difficulty of the overall layout and solves the problem. The need for a large floor area has the effect of reducing costs and increasing efficiency.

Description of the drawings

The present invention will be further described below in conjunction with the accompanying drawings and examples:

Figure 1 is a schematic structural diagram of the present invention.

Detailed ways

Figure 1 is a schematic structural diagram of the present invention. As shown in the figure, the radial direction is the circumferential direction around the extension direction of the front water slag ditch, and the front and rear are the front and rear of the water slag flow direction in the water slag ditch. The exit position where the prepared slag is introduced into the slag tank is the front, and the direction toward the slag tank is the rear; the environmentally friendly ironmaking slag treatment system in this embodiment at least includes a front slag ditch 1, a slag tank 3 and a High-altitude exhaust mechanism, the front slag ditch 1 is used to introduce the punched slag into the slag tank 3, the front slag ditch 1 is in the shape of a radially closed ring, and the front slag ditch 1 is It has a pressure relief hole that balances the pressure in the water slag tank, and has a pressure relief part that opens or closes the pressure relief hole. The high-altitude exhaust mechanism at least includes an exhaust device that discharges the gas in the water slag tank 3. The gas chimney 4, the water slag tank 3 is connected to the front water slag ditch 1 and the exhaust chimney 4 respectively. There is only one exhaust chimney 4. The water slag tank 3 has the function of collecting the water inside the water slag tank 3. The conveying outlet for slag discharge. In this plan, after the slag is punched, it is transported to the slag tank 3 through the front slag ditch 1. The structure of the front slag ditch 1 is a radially closed ring, so that the front slag ditch 1 does not need to be used when transporting slag. The steam is continuously discharged to the outside world, but is uniformly collected and discharged by the exhaust chimney 4 in the water slag tank 3; and a pressure relief hole is opened in the front water slag tank 1, and the opening and closing of the pressure relief hole is controlled by a pressure relief piece, so that the solution This solves the problem of water slag "blasting" during the transportation process. When the water slag "blasts", the pressure relief component can be controlled to keep the pressure relief hole in an open state, and the steam is discharged to the outside world. When the water slag "blasts", there is enough The space is used to absorb and release energy to prevent damage to surrounding structures and equipment; this plan also includes a slag punching point (not shown in the figure) arranged close to the slag tank and directly connected to the slag tank 3, and the slag passes through After high-pressure water is punched, it is directly discharged into the slag tank for deep water granulation (secondary granulation). The vapor produced is directly discharged through the chimney. There is no "shooting" of iron in the slag during transportation to long-distance punching points. Problem, the conventional water storage in the slag tank 3 is 2m-3m. In this plan, the water depth in the slag tank 3 is 2m, which meets the conditions for deep water granulation. While effectively collecting the steam generated by the slag brewing, it can also improve the water quality. The quality of slag and the safety of slag flushing can effectively prevent the "shooting" of iron in the slag; finally, the steam generated by the granulation of the slag, the steam along the slag ditch, and the steam generated by the falling slag all pass through the upper exhaust chimney 4 of the slag tank 3 Centralized, high-altitude emissions; and the high-altitude exhaust chimney 4 performs heat exchange with the outside, reducing steam emissions along the way and saving system water replenishment. There is only one exhaust chimney 4 in this system, which solves the problem of multiple problems in water slag ditch facilities. The problem of setting up the exhaust chimney 4 is to reduce the layout of the exhaust chimney 4. At the same time, the front water slag ditch 1 is arranged with an openable or closed pressure relief hole to meet environmental protection needs and reduce the continuous emission of steam. One water slag tank meets two granulation requirements. points (the proximal end of the water slag tank and the far end of the water slag tank), which reduces the difficulty of the overall layout, solves the need for a large floor area, and achieves the effect of cost reduction and efficiency improvement.

In this embodiment, a rear water slag ditch 2 connected to the conveying outlet is also included. The rear water slag ditch 2 is used to introduce the water slag inside the water slag tank 3 into the bottom filter tank 7 . The integrity of the water slag treatment system is further improved by arranging the rear water slag ditch 2 and the bottom filter tank 7, so that the water slag is completely processed during the transportation process, and the water slag has high stability and improves safety in subsequent operations.

In this embodiment, the bottom wall of the inner cavity of the front water slag ditch 1 is connected to the water slag tank 3 obliquely downward from front to back along the water slag flow direction. As shown in the figure, the top of the front water slag ditch 1 is horizontal and closed to form a box culvert structure. The bottom of the front water slag ditch 1 has a slope extending downward from front to back along the direction of the water slag flow. Inside the front water slag ditch 1 The clearance gradually increases with the bottom slope, which effectively improves the transportation efficiency of water slag, making water slag have the characteristics of efficient and fast transportation, and increases the efficiency of steam discharge and transportation inside the front water slag ditch 1 to the water slag tank 3, improving the water slag The space where the force is absorbed and released when "shooting".

In this embodiment, several of the pressure relief holes are arranged at intervals from front to back along the water slag flow direction, and several of the pressure relief holes are located at the front top of the middle part of the front water slag ditch 1 . Since the clearance in the front water slag ditch 1 gradually increases with the bottom slope, the steam can be directly discharged into the water slag tank 3 at the middle and rear position of the front water slag ditch 1, and the water slag is located at the rear position in the middle of the front water slag ditch." The energy of "shooting" is mostly absorbed by the open space and will not affect surrounding facilities, and the steam is discharged vertically from bottom to top. Therefore, several of the pressure relief holes are located at the top of the middle part of the front slag ditch 1. Of course, the pressure relief holes can also be arranged on the side of the front water slag trench 1 to relieve pressure. I will not go into details here. In this plan, a total of two pressure relief holes are provided, and the two pressure relief holes are spaced apart on the front water slag trench 3. The top of the center near the front.

In this embodiment, a gas collecting cover 5 connected to the front water slag ditch 1 and the water slag tank 3 is also included. The gas collecting cover 5 is connected to the top of the rear middle part of the front water slag ditch 1 . By arranging the gas collecting cover 5 at the top of the middle part of the front slag ditch 1 and behind it, the steam located at the back of the middle part of the front slag ditch 1 can be discharged into the slag tank 3 through a branch, thereby preventing the water level in the slag tank 3 The effect of excessive steam emission on steam emission is to improve the efficiency of steam emission.

In this embodiment, the exhaust chimney 4 is connected to the top of the water slag tank 3 , and the gas collecting hood 5 extends diagonally upward from bottom to top and is connected to the water slag tank 3 . The gas collecting cover 5 extends obliquely backward and is connected with the side wall of the water slag tank 3. The gas collecting cover 5 is arranged in the middle and rear position of the front water slag ditch 1 and extends obliquely backward to form a joint with the front water slag ditch 1. The expanded "flare-shaped" steam collection cavity along the direction of water slag flow effectively collects the slag punching steam and finally discharges it through the exhaust chimney 4; improving steam discharge efficiency.

In this embodiment, the rear water slag ditch 2 is in the shape of a radially closed ring, and the rear water slag ditch 2 has a slope surface that improves the drainage efficiency of water slag inside the rear water slag ditch 2 . The top slope of the rear water slag ditch 2 is the same as the bottom slope, and the clearance in the ditch remains unchanged. It is a closed path arranged obliquely backward. The front end of the rear water slag ditch 2 is connected with the water slag tank 3. The rear water slag ditch 2 The rear end of the filter tank 7 is connected to the bottom filter tank 7. In the radial section, the bottom of the rear water slag ditch is "U" shaped, and the "U" shaped opening is closed by the cover plate, so that the rear water slag ditch forms a radial It has a closed structure, and the cover plates are multiple ones arranged at intervals along the flow direction of the water slag. There is a balance gap between adjacent cover plates, which is used to balance the internal pressure of the rear water slag ditch and make the rear water slag ditch form a nearly closed box. Culvert structure, the front water slag ditch along the water slag flow direction is a continuously closed box culvert structure with a pressure relief hole, and the rear water slag ditch is approximately closed due to the interval arrangement of the cover plates along the water slag flow direction. The box culvert structure, when actually laid, the rear water slag ditch can also be an integral continuously closed box culvert structure, which will not be described again here; the rear water slag ditch 2 is placed on the back side of the water slag tank 3, and the deep water passes through the water slag tank 3 After the granulation and high-altitude exhaust chimney 4 steam is collected and discharged, there is less steam here and there is no risk of "shooting". The rear slag ditch 2 only adopts a cover-sealed structure to prevent steam leakage and facilitate maintenance.

In this embodiment, the bottom filter 7 is connected to a gas collecting pipe 6, and the end of the gas collecting pipe 6 is connected to the slag tank 3 or the exhaust chimney 4. The end of the gas collection pipe 6 is connected to the water slag tank 3 or the high-altitude exhaust chimney 4; the initial end is connected to the side wall of the bottom filter 7 or the drum gas collection hood according to the water slag filtration process; in this plan, the gas collection pipe 6 The initial end is connected to the bottom filter tank 7, and the steam generated at the final drop point of the slag-water mixture is connected through the pipeline system and finally discharged from the high-altitude exhaust chimney 4 on the slag tank 3.

In this embodiment, the top opening of the water slag tank 3 gradually shrinks in diameter from bottom to top and extends upward to form a connecting section. The connecting section is tapered. The bottom of the exhaust chimney 4 is fixed between the connecting section and the water slag. Slot 3 is connected. The exhaust chimney 4 is arranged on the upper part of the slag tank 3. The upper end of the exhaust chimney 4 extends to the top of the blast furnace. The tapered connecting section is reduced in size from bottom to top, which improves the stability of the exhaust chimney 4. , the overall structural stability is high.

In this embodiment, the pressure relief component is a hinged cover covering the pressure relief hole, and the hinged cover can be movable and disposed in the front slag ditch 1 with a limited position. The loose-leaf cover can be arranged on the top of the front water slag ditch 1 in a position-limited manner. When the internal pressure of the front water slag ditch 1 is too high, the loose-leaf cover can be pushed open so that the pressure relief hole can communicate with the external environment and the front water slag can be protected. The internal pressure of the slag ditch 1 is relieved. After the pressure relief is completed, the pressure relief hole is closed by resetting the reset piece, so that the front water slag ditch 1 forms a closed box culvert structure.

In this embodiment, a reset member is connected between the loose-leaf cover plate and the front water slag ditch 1. The pressure in the front water slag ditch 1 drives the loose-leaf cover plate to separate from the pressure relief hole so that the pressure relief hole opens. The reset member The component has an elastic force for separating the loose-leaf cover plate from the pressure relief hole to relieve pressure in the front water slag ditch 1. The reset component also has a reset force for returning the loose-leaf cover plate to the pressure relief hole to close the pressure relief hole. The reset member is opposite to the hinged shaft of the loose-leaf cover, and is a spring. In this solution, the hinged shaft and the spring of the loose-leaf cover are relatively arranged along the flow direction of the water slag. The arrangement of the reset member makes the loose-leaf cover It has the characteristics of automatic reset, easy component selection and low cost. There is no need to install reset parts during actual construction or use. The loose-leaf cover is manually closed in the pressure relief hole through inspection by inspection personnel. In this plan, the loose-leaf cover is opened from the front. The internal pressure of the slag ditch is controlled to open and reset through the reset piece, which has the characteristics of mechanical self-adjusting control; the pressure relief piece and the reset piece that resets the pressure relief piece can also be replaced by a monitoring control system with electronic control components. , to realize the opening/closing of the pressure relief hole, which will not be described in detail here.

The working process of the present invention is: the molten slag is punched at the front end of the front water slag ditch 1, and after the punching is completed, the slag-water mixture directly enters the water slag tank 3 through the front water slag ditch 1, and the slag water after punching is The mixture is collected at the slag tank 3; since the closed front slag tank 1 is combined with the gas collecting hood 5 in the middle and rear section of the front slag tank 1 to form a "horn-shaped" steam collection cavity, the slag punching steam is processed Effectively collected and finally discharged through the exhaust chimney 4; coupled with the relatively dense pressure relief holes arranged in the front section of the middle part of the water slag ditch 1, there is enough space to absorb and release energy when the water slag is "fired" to prevent damage. Surrounding structures and equipment; the steam generated by slag punching is directly collected through the slag tank 3 and discharged from the high-altitude exhaust chimney 4; it is directly connected to the slag punching point of the slag tank 3, and the slag is directly punched by high-pressure water. It is discharged into the slag tank. The slag tank 3 normally stores 2 meters of water, which meets the conditions for deep water granulation. While effectively collecting the steam generated by slag punching, it can also improve the quality of the slag and the safety of slag flushing, effectively preventing The iron in the slag is blasted; the rear water slag ditch 2 is placed behind the water slag tank 3, where there is less steam and there is no risk of "blasting". The rear water slag ditch 2 only adopts a closed structure to prevent steam from leaking; in the slag water The steam generated at the final drop of the mixture is discharged from the high-altitude exhaust chimney 4 on the slag tank 3 through the pipe system; finally, the steam generated by the granulation of the slag, the steam along the slag ditch, and the steam generated by the falling slag all pass through the slag. The exhaust chimney 4 in the upper part of the tank 3 is concentrated and discharged at high altitude; and the high-altitude exhaust chimney 4 performs heat exchange with the outside, reducing steam emissions along the way and saving system water replenishment.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified. Modifications or equivalent substitutions without departing from the spirit and scope of the technical solution of the present invention shall be included in the scope of the claims of the present invention.

Claims

An environmentally friendly ironmaking slag treatment system, characterized by: at least including a front slag ditch, a slag tank and a high-altitude exhaust mechanism, the front slag ditch is used to introduce punched slag into the slag tank, The front water slag ditch is in the shape of a radially closed ring. The front water slag ditch has a pressure relief hole for balancing the pressure in the water slag ditch. The pressure relief hole has a pressure relief hole for opening or closing the pressure relief hole. The high-altitude exhaust mechanism at least includes an exhaust chimney for discharging the gas in the slag tank. The slag tank is connected to the front slag ditch and the exhaust chimney respectively. There is only one exhaust chimney. , the water slag tank has a transport outlet for discharging the water slag inside the water slag tank.
The environmentally friendly ironmaking slag treatment system according to claim 1, characterized in that it also includes a rear slag ditch connected to the conveying outlet, and the rear slag ditch is used to introduce the slag inside the slag tank to the bottom filter. Pool.
The environmentally friendly ironmaking slag treatment system according to claim 1, characterized in that: the pressure relief component is a loose-leaf cover covering the pressure relief hole, and the loose-leaf cover can be movable and arranged in the front water with a limited position. Slag ditch.
The environmentally friendly ironmaking slag treatment system according to claim 3, characterized in that: a reset member is connected between the loose-leaf cover plate and the front slag ditch, and the pressure in the front slag ditch drives the loose-leaf cover plate and the drain The separation of the pressure hole causes the pressure relief hole to open. The reset member has an elastic force for separating the loose-leaf cover plate from the pressure relief hole to relieve pressure in the front water slag ditch. The reset member also has the function of returning the loose-leaf cover plate to the pressure relief hole. The restoring force that causes the pressure relief hole to close.
The environmentally friendly ironmaking slag treatment system according to claim 1, characterized in that: a plurality of the pressure relief holes are arranged at intervals from front to back along the slag flow direction, and several of the pressure relief holes are located in the front slag ditch. The top of the center near the front.
The environmentally friendly ironmaking slag treatment system according to claim 5, further comprising: a gas collecting hood connected to the front slag ditch and the slag tank, and the gas collecting hood is connected to the rear part of the front slag ditch. top.
The environmentally friendly ironmaking slag treatment system according to claim 6, wherein the exhaust chimney is connected to the top of the slag tank, and the gas collecting hood extends obliquely from bottom to top and is connected to the slag tank.
The environmentally friendly ironmaking slag treatment system according to claim 1, characterized in that: the bottom wall of the inner cavity of the front slag trench is connected to the slag trench obliquely downward from front to back along the slag flow direction.
The environmentally friendly ironmaking slag treatment system according to claim 2, characterized in that: the rear slag ditch is in a radially closed ring shape, and the rear slag ditch has the function of improving the slag discharge efficiency inside the rear slag ditch. of slope.
The environmentally friendly ironmaking slag treatment system according to claim 9, characterized in that: the bottom filter is connected to a gas collecting pipe, and the end of the gas collecting pipe is connected to a slag tank or an exhaust chimney.