Device and method for indirectly water-cooling high-temperature slag through suspension tank

Abstract

The invention discloses a device and method for indirectly water-cooling high-temperature slag through a suspension tank. The device comprises a circulating recovery pool, a slag bin, the suspension tank, a power part and a track. High-temperature molten slag is charged into the suspension tank, the suspension tank floats in cooling water, indirect water cooling is achieved through cooling heat transfer of the suspension tank, and different cooling rates within a large range are achieved by controlling the loading capacity of the suspension tank, the movement speed of the suspension tank, the cooling water temperature, the cooling water amount and other operations. And meanwhile, most heat is recycled through the hot water recycling system. And after the high-temperature slag is cooled to the required temperature, the high-temperature slag is automatically overturned and discharged into a subsequent system. The whole technological process of indirect water cooling of the high-temperature slag is completed through circulating reciprocating operation of a plurality of groups of suspension tanks; according to the scheme, the high-temperature slag bin, the high-temperature slag control valve and the like are adopted, a relatively stable surge bin is established for high-temperature slag, dependence and influence on upstream procedures are reduced, and a foundation is laid for stabilization of subsequent cooling procedures.

Description

Technical Field

[0001] The present invention relates to the field of cooling and recycling of high-temperature slag, and particularly to a device and method for indirectly water-cooling high-temperature slag in a suspension tank. Background Art

[0002] Slag can be classified into blast furnace iron slag, copper slag, lead-zinc slag, aluminum slag, manganese slag, titanium slag, etc. according to metal ores. Taking the blast furnace iron slag with the largest output as an example, blast furnace iron slag is an industrial solid waste generated during the blast furnace ironmaking process, also known as blast furnace slag. It becomes liquid in the high-temperature combustion zone (1300 - 1700 °C) in the blast furnace, floats on the molten iron and is discharged from the furnace body through the slag discharge port, and becomes blast furnace slag after cooling and solidification. The recycling of high-temperature slag has broad application prospects and important economic and environmental significance. With the continuous progress of technology and strong policy support, the recycling of high-temperature slag will be more widely promoted and applied. The main components of blast furnace iron slag include oxides such as SiO2, Al2O3, CaO, MgO, as well as a small amount of metal sulfides and fluorides. Its essence is also a kind of silicate material, and its chemical composition is basically the same as that of natural ores and Portland cement components, and it has high hydraulic activity and hydraulic coefficient. There are currently three methods for cooling and recycling high-temperature slag. First, direct water quenching can obtain rapidly cooled slag with a large proportion of vitreous crystal form, which is used for doping in cement clinker or making slag bricks, etc. Second, medium-speed cooling by air granulation can produce glass microspheres, which are used for building lightweight aggregates and fire and sound insulation materials, etc. Third, slow cooling by low-speed air can obtain slag with relatively complete crystallization, which is used for aggregates, slag concrete, etc.

[0003] At present, the mainstream recycling method is the water quenching high-speed cooling method, that is, directly contacting and mixing the high-temperature molten slag with water for cooling. The water quenching method usually causes the high-temperature slag to cool rapidly and precipitate a large number of fine crystals. Most of its components do not form a crystal structure under solid-state conditions, forming a non-crystalline substance, namely the glass phase. The more the content of the glass phase, the higher the activity of the slag, which can be used to partially replace cement clinker. However, the water quenching method also has many disadvantages, such as the waste heat not being effectively recovered (except for a small part used for heating), large water consumption, air pollution (SO2, H2S) generated, equipment corrosion and wear, and affecting the plant environment. In addition, after direct contact cooling by water quenching, the water content in the slag is relatively large, and a large amount of heat energy is required for subsequent drying treatment, which also affects the recycling performance and quality of the slag to a certain extent. Another relatively less used cooling and recycling method is natural slow cooling, that is, directly placing the high-temperature molten slag in an open pit for natural slow cooling. The crystallization of the slag is relatively complete and has a high hardness, and can be used as aggregate. However, this method also has many disadvantages, such as difficult heat recovery, large floor area, and large environmental pollution. There is also a method of air-cooling high-temperature slag that has been studied a lot, and some pilot lines have been established, but there are few large-scale mature application projects. This cooling form can better achieve heat recovery, but its cooling rate is relatively low, and it often needs to be used in combination with a granulator, that is, granulating the high-temperature molten slag and then cooling it. In addition, air-cooling convective heat transfer requires a large amount of additional energy consumption, and it is difficult to achieve large-scale industrialization.

[0004] Therefore, based on the problems of the above-mentioned various cooling and recycling schemes, it is very important to design an efficient cooling device and method for high-temperature slag by indirect water cooling in a suspension tank. To obtain better heat recovery and a more effectively controllable cooling rate, and to provide a better path selection for the cooling and recycling of high-temperature slag. Summary of the Invention

[0005] The purpose of the present invention is to provide a device and method for indirectly water-cooling high-temperature slag in a suspension tank for the above-mentioned deficiencies, and solve the problems of high power consumption, low recycling rate, and large environmental pollution existing in the prior art when using direct water quenching cooling and natural slow cooling.

[0006] The present invention is realized through the following scheme:

[0007] A device for indirectly water-cooling high-temperature slag in a suspension tank includes the following steps:

[0008] It includes a circulating recovery tank, a slag bin, a suspension tank, a power unit and a track; the track is in an overall annular structure and covers at least part of the circulating recovery tank, the slag bin is arranged in the area where the circulating recovery tank is located, the discharge end of the slag bin is on the movement track of the suspension tank, the suspension tank is connected to the power unit through a connecting piece, and the power unit can reciprocate along the length direction of the track, alternately moving the suspension tank into or out of the circulating recovery tank.

[0009] Based on the structure of the above device for indirectly water-cooling high-temperature furnace slag with a suspension tank, the circulating recovery tank is provided with a heat exchange medium, and a hot water recycling system is also arranged in the circulating recovery tank, and the hot water recycling system can discharge the heat exchange medium from the circulating recovery tank; the connecting piece is a suspension rope.

[0010] Based on the structure of the above device for indirectly water-cooling high-temperature furnace slag with a suspension tank, the slag bin includes a high-temperature slag bin and a low-temperature slag bin; high-temperature slag control valves and low-temperature slag control valves are respectively arranged at the outlet ends of the high-temperature slag bin and the low-temperature slag bin; the outlet end of the low-temperature slag bin is arranged close to the outlet end of the high-temperature slag bin.

[0011] Based on the structure of the above device for indirectly water-cooling high-temperature furnace slag with a suspension tank, the suspension tank includes a tank body, longitudinal rib plates, transverse rib plates and a horizontal plate. The longitudinal rib plates are evenly spaced and arranged in multiple numbers on the outer side of the bottom of the tank body along the length direction of the tank body, and the transverse rib plates are evenly spaced and arranged in multiple numbers on the outer side of the bottom of the tank body along the width direction of the tank body; the longitudinal rib plates and the transverse rib plates are arranged in a staggered manner, the horizontal plate is arranged in a circumferential direction at the upper end position of the suspension tank, and the horizontal plate is arranged at a predetermined distance from the top opening end of the suspension tank.

[0012] Based on the structure of the above device for indirectly water-cooling high-temperature furnace slag with a suspension tank, the tank body is of a shallow-mouth and flat-wide type, and the cross-section of the tank body is trapezoidal, that is, the upper opening size of the tank body is not less than the width size of the tank body, and the bottom edge and side edge of the tank body are in a smooth large arc shape.

[0013] Based on the structure of the above device for indirectly water-cooling high-temperature furnace slag with a suspension tank, lifting lug plates are arranged on both sides in the length direction of the suspension tank, the lifting lug plates are symmetrically arranged along the central position of the suspension tank, and each lifting lug plate is respectively connected to the connecting piece; each lifting lug plate is distributed with a lifting hole, and the lifting hole is located below the center of gravity line of the suspension tank.

[0014] Based on the structure of the above device for indirectly water-cooling high-temperature furnace slag with a suspension tank, the power unit includes a lifting assembly and a walking wheel assembly; the walking wheel assembly can move along the length direction of the track, the lifting assembly is connected to the suspension rope, and the lifting assembly can scale the suspension rope.

[0015] The present solution discloses a method for indirectly water-cooling high-temperature slag in a suspension tank, comprising the following steps:

[0016] Step 1: Loading the suspension tank. Sequentially control all the walking wheel assemblies on the suspension tank to move synchronously on the track, so that the suspension tank moves to the position where the slag bin is located for loading;

[0017] Step 2: Slag cooling area. Control all the walking wheel assemblies to move synchronously on the track, so that the suspension tank enters the cooling area and reciprocates in the cooling area;

[0018] Step 3: Slag dumping. Under the action of the lifting assembly, the suspension tank starts to rise in height, gradually disengages from the water surface, and then runs to the unloading area under the action of the walking wheel assembly; there is a downstream conveying device in the unloading area; when the suspension tank reaches the area where the conveying device is located, the lifting rope on one side starts to be pulled up under the action of the lifting assembly, and the lifting rope on the other side is gradually lowered under the action of the lifting assembly. Under the action of gravity, the tipping and flipping unloading is completed; after complete unloading, the lifting assembly acts to make the suspension tank return to balance and enters the next cycle of heat recovery area through the annular track.

[0019] When loading, open the low-temperature slag control valve to start discharging cold materials from the low-temperature slag bin. After the cold materials fill the bottom of the suspension tank, close the low-temperature slag control valve, and then the high-temperature slag bin discharges hot materials. After the hot materials are filled to the specified position, close the high-temperature slag control valve.

[0020] According to different types of slag and different requirements for the cooling rate, adjust the load of the suspension tank, the traveling speed and time of the suspension tank in the cooling area, the water temperature of the cooling water, and the water volume, so as to meet the process requirements of different cooling rates in the same system.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. This solution adopts a high-temperature slag bin, a high-temperature slag control valve, etc., to establish a relatively stable buffer bin for high-temperature slag, reduce the dependence on and influence on the upstream process, and also lay a foundation for the stability of the subsequent cooling process. The buffer bin can stably control the incoming material of high-temperature molten slag, and the blanking, cooling, and unloading of the suspension tank are stable, accurate, and controllable. The subsystems such as cyclic heat recovery are integrated comprehensively and efficiently, promoting the stable and reliable operation of the entire cooling process and system.

[0023] 2. This scheme adopts indirect water cooling to cool the high-temperature slag (the cooling water is not in direct contact with the slag), and uses a suspension tank as an intermediate carrier for cooling and heat transfer. Indirect water cooling can also basically achieve a high rapid cooling rate of water cooling. At the same time, the fusion design of the suspension tank and cooling water integrates the dual functions of indirect heat exchange of cooling water and suspension support, avoiding complex mechanical structures and eliminating the need for dedicated transmission mechanisms. This can correspondingly reduce the energy consumption of cooling treatment and enhance the reliability of system operation.

[0024] 3. The suspension tank of this scheme adopts a shallow flat wide design to control the height of the high-temperature molten slag in the suspension tank, and multiple longitudinal and transverse reinforced heat exchange ribs to comprehensively improve the cooling and heat exchange effect of the suspension tank.

[0025] 4. In this scheme, the suspension tank floats in the cooling water, and the water also has a load-bearing function, which perfectly integrates the two functions of cooling and floating load-bearing, making the entire high-temperature slag cooling and recovery system more simple, efficient and reliable.

[0026] 5. The suspension tank of this scheme can move back and forth in the cooling area under the traction of the suspension rope and the walking trolley, which can strengthen the flow of cooling water, break the boundary layer of liquid-solid heat exchange, and enhance the heat exchange effect. In addition, before cooling and loading, there is a low-temperature slag bottom to isolate the high-temperature slag and the suspension tank. After the high-temperature slag is cooled, it can be turned over and unloaded by the walking trolley and continuously enter the next process system.

[0027] 6. In this scheme, multiple groups of suspended tanks can be accurately and controllably circulated on the circular track through their own suspension ropes and walking trolleys, and under the action of the controller, the entire system can be divided into several process areas to achieve stable and continuous operation.

[0028] 7. The entire cooling water of this scheme is controlled by a hot water circulation system. By controlling the temperature and flow of the cooling water, different cooling rates can be adjusted to adapt to slags with different cooling rates.

[0029] 8. The entire cooling water of this scheme is controlled by a hot water recycling system, which can effectively recover most of the heat energy. In addition, since the cooling water does not directly contact the high-temperature slag, the cooling water is pollution-free and can be recycled, saving a lot of water resources.

[0030] 9. This scheme can achieve different cooling rates for high-temperature slag by controlling the residence time of the suspension tank in the cooling water, controlling the speed of the suspension tank movement, the load of the suspension tank, and auxiliary control of the cooling water temperature and water volume, that is, achieving different cooling rates such as relatively fast, medium, and slow cooling, to meet the needs of producing products with different cooling rates in the same system.

[0031] 10. This solution is more concise and efficient than the existing treatment solutions. It also overcomes many disadvantages of the existing treatment solutions, with less investment, less land occupation, and can be widely promoted and used in large-scale industrialization. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] FIG. Figure 1 is an isometric view of the suspension tank indirect water-cooled high-temperature slag system;

[0033] FIG. Figure 2 is a top view of the suspension tank indirect water-cooled high-temperature slag system;

[0034] FIG. Figure 3 is a longitudinal sectional view of the suspension tank indirect water-cooled high-temperature slag system;

[0035] FIG. Figure 4 is a transverse sectional view of the suspension tank indirect water-cooled high-temperature slag system;

[0036] FIG. Figure 5 is an isometric view of the suspension tank;

[0037] FIG. Figure 6 is a transverse sectional view of the suspension tank;

[0038] Reference Numerals: 1, circulating recovery pool; 2, slag bin; 3, suspension tank; 4, power unit; 5, track. 11, loading area; 12, cooling area; 13, unloading area; 14, circulating heat recovery area; 15, heat exchange medium; 16, hot water recycling system; 21, high-temperature slag bin; 22, low-temperature slag bin; 23, high-temperature slag control valve; 24, low-temperature slag control valve; 31, tank body; 32, longitudinal rib; 33, transverse rib; 34, horizontal plate; 35, lifting lug plate; 36, lifting hole; 37, controller; 38, transportation structure. DETAILED DESCRIPTION OF THE INVENTION

[0039] All features disclosed in this specification, or all steps in any method or process disclosed, except for mutually exclusive features and / or steps, can be combined in any manner.

[0040] Any feature disclosed in this specification (including any additional claims, abstract) can be replaced by other equivalent or similar-purpose alternative features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only an example of a series of equivalent or similar features.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a predetermined orientation, be constructed and operated in a predetermined orientation, and therefore should not be construed as a limitation on the present invention.

[0042] In addition, terms such as "first", "second", etc. are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features.

[0043] Embodiment 1

[0044] The present invention provides a technical solution:

[0045] As Figures 1 to 6 shown, a device for indirectly water-cooling high-temperature slag in a suspension tank 3, which at least includes but is not limited to a circulating recovery tank 1, a slag bin 2, a suspension tank 3, a power unit 4, and a track 5; the track 5 is integrally in a circular structure and covers at least part of the circulating recovery tank 1. The slag bin 2 is arranged in the area where the circulating recovery tank 1 is located, and the discharge end of the slag bin 2 is on the movement track of the suspension tank 3. The suspension tank 3 is connected to the power unit 4 through a connecting member, and the power unit 4 can reciprocate along the length direction of the track 5, alternately moving the suspension tank 3 into or out of the circulating recovery tank 1.

[0046] The connecting member in this solution can be a suspension rope, a connecting chain, or other structures that can connect and have a certain rigidity. Looking from Figure 1 the top view, the whole system is divided into a loading area, a cooling area, a discharging area, and a circulating heat recovery area. Each area realizes its own function and is connected in series into an organic whole through the oval-shaped circular track 5.

[0047] Based on the above structure, when it is necessary to cool the slag, control the power unit 4 to drive the suspension tank 3 to move into the circulating recovery tank 1. The material is placed in the suspension tank 3 through the slag bin 2. The suspension tank 3 carrying the slag exchanges heat with the heat exchange medium in the circulating recovery tank 1 to reduce the temperature of the slag. Subsequently, the slag cooled to the specified temperature is removed from the circulating recovery tank 1, and the slag is poured into the transportation structure to empty the suspension tank 3, and then the suspension tank 3 is moved into the circulating recovery tank 1 to realize the circulating operation.

[0048] As an example, the circulating recovery tank 1 is integrally in a rectangular structure. The circulating recovery tank 1 is provided with a heat exchange medium, and the heat exchange medium can be cooling water. A hot water recycling system can also be provided in the circulating recovery tank 1, and the hot water recycling system can discharge the heat exchange medium from the circulating recovery tank 1;

[0049] Based on the above structure, during the process of cooling the slag, since the cooling water and the slag do not come into direct contact with each other and have no influence on each other, that is, the properties of the cooled slag are intact and no additional drying is required. In addition, the cooling water is not polluted and has less loss. Most of it can be reused, and it is also convenient for heat recovery through the hot water recycling system. The hot water recycling system also has the function of regulating the temperature and quantity of the cooling water, and assisting in regulating the cooling rate.

[0050] As an example, the slag bin 2 can include a high-temperature slag bin 2 and a low-temperature slag bin 2; high-temperature slag control valves and low-temperature slag control valves are respectively arranged at the outlet ends of the high-temperature slag bin 2 and the low-temperature slag bin 2; the outlet end of the low-temperature slag bin 2 can be arranged close to the outlet end of the high-temperature slag bin 2.

[0051] Based on the above structure, when the suspension tank 3 is filled with slag, the suspension tank 3 floats in the cooling water. After the suspension tank 3 enters the designated position for loading, first, the relatively low-temperature cold material is put into the suspension tank 3 through the low-temperature slag bin 2 to fill the bottom of the suspension tank 3. Its function is to isolate the hot material and the suspension tank 3, avoid the influence of the high-temperature molten hot material on the suspension tank 3, and facilitate subsequent tipping and discharging. Then, the low-temperature slag control valve is closed, and then the high-temperature slag bin 2 discharges the hot material. After the hot material is filled to the designated position (about half of the designed full-load capacity of the suspension tank 3), the high-temperature slag control valve is closed.

[0052] As an example, the high-temperature slag bin 2 is connected to the slag ditch, and a heat preservation structure is arranged outside the high-temperature slag bin 2.

[0053] Based on the above structure, the high-temperature molten slag enters the high-temperature slag bin 2 from the slag ditch. The high-temperature slag bin 2 plays a buffering role and can store a certain amount of high-temperature molten slag, reducing the dependence on the upstream system; at the same time, to maintain the fluidity of the high-temperature molten slag, the high-temperature slag bin 2 also needs to maintain a certain temperature, that is, an external heat preservation structure needs to be correspondingly arranged outside the bin to reduce and control the temperature drop. For specific types of slag, the corresponding minimum temperature value is guaranteed. Taking high-temperature iron slag as an example, at least the temperature in the high-temperature slag bin 2 needs to be guaranteed to be above 1250 °C. Below this temperature, the high-temperature slag begins to solidify and the fluidity decreases; after the material in the high-temperature slag bin 2 stands for a period of time, the temperature drops slightly, and at the same time, the high-temperature slag also begins to nucleate, laying a foundation for subsequent crystallization and cooling.

[0054] As an example, the suspension trough 3 has an overall rectangular structure. The suspension trough 3 may include a trough body, longitudinal ribs, transverse ribs and horizontal plates. The longitudinal ribs are evenly spaced apart at multiple locations on the outer side of the bottom along the length direction of the trough body, and the transverse ribs are evenly spaced apart at multiple locations on the outer side of the bottom along the width direction of the trough body. The longitudinal ribs and the transverse ribs are staggered, and the horizontal plate is annularly arranged at the upper end portion of the suspension trough 3, and the horizontal plate is arranged at a predetermined distance from the top opening end of the suspension trough 3.

[0055] The trough body is shallow, flat and wide, and the cross-section of the trough body is trapezoidal, that is, the upper opening size of the trough body is not less than the width size of the trough body, that is, the upper opening is large and the lower opening is small; the bottom and side edges of the trough body are smooth large arcs.

[0056] Based on the above structure, the trough body of the suspension trough 3 is set to be shallow, flat and wide, which is overall wider, which is conducive to increasing the heat exchange area, and is also conducive to increasing the stability of the suspension trough 3 to avoid large shaking; the cross-section of the trough body is trapezoidal, with a large upper mouth and a small lower mouth, and the bottom and side edges are smooth large arcs, which are convenient for flipping, demoulding and unloading; the suspension trough 3 is provided with multiple groups of longitudinal ribs and transverse ribs, which are used to support and strengthen the trough structure, ensure the stability of the trough structure, increase the heat exchange area, and enhance the heat exchange efficiency. There are horizontal plates on both sides of the middle and upper part of the shallow, flat and wide suspension trough 3. The horizontal plates keep a certain distance from the upper surface of the trough body. This distance is also the warning line of the safe load to prevent the suspension trough 3 from overloading and overturning. At the same time, the horizontal plates arranged outward help to further increase the width of the suspension trough 3 and increase the balance and anti-fluctuation of the trough body.

[0057] As an example, ear plates are provided on both sides of the suspension tank 3 in the length direction. The ear plates are symmetrically arranged along the center position of the suspension tank 3. There are four ear plates in total, and each ear plate is connected to a connecting piece.

[0058] Each of the lifting lug plates has a lifting hole, and the lifting hole is located below the center of gravity of the suspension tank 3 .

[0059] Based on the above structure, four lifting lug plates are provided to facilitate lifting and moving the suspension tank 3, and the lifting holes are located below the center of gravity of the suspension tank 3, which is convenient for flipping and unloading. At the same time, the lifting lug holes are located on both sides of the tank body, so that when unloading, the material will not interfere with the lifting rope when it enters the downstream conveying device from the tank body.

[0060] As an example, the power unit 4 may include a lifting assembly and a running wheel assembly; the running wheel assembly can move along the length direction of the track 5, the lifting assembly is connected to the suspension rope, and the lifting assembly can scale the suspension rope.

[0061] Based on the above structure, multiple walking wheel assemblies cooperate to drive the smooth movement of the suspension tank 3. The lifting and lowering assembly is used to raise or lower the position of the suspension tank 3 in the vertical direction and to achieve the tipping function of the suspension tank 3. Specifically, the smooth lifting and lowering operation of the suspension tank 3 is achieved through the synchronous lifting and lowering operation of all the lifting and lowering assemblies. The tipping operation of the suspension tank 3 is achieved by the lifting and lowering operation of the unilateral lifting and lowering assembly while the opposite-side lifting and lowering assembly remains stationary.

[0062] As an example, a controller is provided on the side wall of the suspension tank 3, and the controller is respectively connected to the walking wheel assembly and the lifting and lowering assembly.

[0063] Based on the above structure, all the motion controls of the suspension tank 3 in the loading area, cooling area, unloading area, and cyclic heat recovery area are limited and controlled by this system, enabling multiple groups of suspension tanks 3 to form a highly integrated process system.

[0064] In this solution, the suspension tank 3 floats on the water surface, integrating the functions of cooling and floating and load bearing. It has no additional mechanical mechanism, low energy consumption, a simple and reliable system, small investment and floor area, and has strong practical value.

[0065] Embodiment 2

[0066] Based on the structure of the above Embodiment 1, the present invention provides a technical solution:

[0067] A method for indirectly water-cooling high-temperature slag in a suspension tank 3, which includes the following steps:

[0068] Step 1: Loading the suspension tank 3. Sequentially control all the walking wheel assemblies on the suspension tank 3 to move synchronously on the track 5, so that the suspension tank 3 moves to the position where the slag bin 2 is located for loading.

[0069] When loading, open the low-temperature slag control valve to start discharging cold materials from the low-temperature slag bin 2. After the bottom of the suspension tank 3 is filled with cold materials (isolating the hot materials and the suspension tank 3 to avoid the influence of the high-temperature molten hot materials on the suspension tank 3 and facilitating subsequent tipping and unloading), close the low-temperature slag control valve, and then the high-temperature slag bin 2 discharges hot materials. After the hot materials are filled to the specified position (about half of the designed full-load capacity of the suspension tank 3), close the high-temperature slag control valve.

[0070] Step 2: Slag cooling area. Control all the walking wheel assemblies to move synchronously on the track 5, so that the suspension tank 3 enters the cooling area and performs reciprocating motion in the cooling area to enhance the heat exchange efficiency of the suspension tank 3, break the boundary layer of liquid-solid heat exchange, and strengthen heat exchange.

[0071] According to different types of slag and different cooling rate requirements, this system can meet the process requirements of achieving different cooling rates in the same system by adjusting the load of the suspension tank 3, the speed and time of the suspension tank 3 in the cooling zone, the temperature and water volume of the cooling water, etc., and also lay the foundation for the use of various slags. After the slag is cooled to the temperature required by the process, it will enter the next unloading process area.

[0072] Step 3: The slag is dumped. The suspension tank 3 begins to rise in height under the action of the lifting assembly, gradually leaves the water surface, and then moves to the unloading area under the action of the walking wheel assembly; there is a downstream conveying device in the unloading area; when the suspension tank 3 reaches the area where the conveying device is located, the lifting rope on one side begins to be pulled up under the action of the lifting assembly, and the lifting rope on the other side is gradually lowered under the action of the lifting assembly, and under the action of gravity, the overturning and flipping unloading is completed; after complete unloading, the lifting assembly acts to restore the balance of the suspension tank 3, and enters the next circulating heat recovery area through the circular track 5.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for indirectly water cooling high-temperature slag in a suspension tank, characterized in that: It includes a circulating recovery pool, a slag bin, a suspension trough, a power unit and a track; the track is annular in structure as a whole and covers at least part of the circulating recovery pool; the slag bin is arranged in the area where the circulating recovery pool is located; the discharge end of the slag bin is on the movement track of the suspension trough; the suspension trough is connected to the power unit through a connecting piece; the power unit can reciprocate along the length direction of the track to alternately move the suspension trough into or out of the circulating recovery pool.

2. The device and method for indirectly water cooling high-temperature slag in a suspension tank as claimed in claim 1, characterized in that: The circulation recovery pool is provided with a heat exchange medium, and a hot water circulation system is also provided in the circulation recovery pool, and the hot water circulation system can discharge the heat exchange medium out of the circulation recovery pool; the connecting piece is a suspension rope.

3. The device and method for indirectly water cooling high-temperature slag in a suspension tank as claimed in claim 2, characterized in that: The slag bin includes a high-temperature slag bin and a low-temperature slag bin; the outlet ends of the high-temperature slag bin and the low-temperature slag bin are respectively provided with a high-temperature slag control valve and a low-temperature slag control valve; the outlet end of the low-temperature slag bin is arranged close to the outlet end of the high-temperature slag bin.

4. The device and method for indirectly water cooling high-temperature slag in a suspension tank as claimed in claim 3, characterized in that: The suspension trough includes a trough body, longitudinal ribs, transverse ribs and horizontal plates. The longitudinal ribs are evenly spaced at multiple intervals on the outer side of the bottom along the length direction of the trough body, and the transverse ribs are evenly spaced at multiple intervals on the outer side of the bottom along the width direction of the trough body; the longitudinal ribs and transverse ribs are staggered, the horizontal plate is circumferentially arranged at the upper end portion of the suspension trough, and the horizontal plate is arranged at a predetermined distance from the top opening end of the suspension trough.

5. The device and method for indirectly water cooling high-temperature slag in a suspension tank as claimed in claim 4, characterized in that: The trough body is of shallow, flat and wide type, and the cross section of the trough body is trapezoidal, that is, the upper opening size of the trough body is not less than the width size of the trough body, and the bottom edge and side edge of the trough body are smooth large arc shapes.

6. The device and method for indirectly water cooling high-temperature slag in a suspension tank as claimed in claim 5, characterized in that: Ear plates are arranged on both sides of the suspension tank in the length direction, and the ear plates are symmetrically arranged along the center position of the suspension tank, and each ear plate is connected to the connecting piece respectively; a hanging hole is distributed on each ear plate, and the hanging hole is located below the center of gravity of the suspension tank.

7. The device and method for indirectly water cooling high-temperature slag in a suspension tank as claimed in claim 6, characterized in that: The power unit includes a lifting assembly and a running wheel assembly; the running wheel assembly can move along the length direction of the track, the lifting assembly is connected to the suspension rope, and the lifting assembly can scale the suspension rope.

8. A method for indirectly water cooling high temperature slag in a suspension tank, characterized in that: The following steps are involved: Step 1: Loading the suspension tank, sequentially controlling all the traveling wheel assemblies on the suspension tank to move synchronously on the track, so that the suspension tank moves to the location of the slag bin for loading; Step 2: Slag cooling zone, control all the travel wheel components to move synchronously on the track, so that the suspension tank enters the cooling zone and reciprocates in the cooling zone; Step 3: Slag dumping, the suspension tank begins to rise in height under the action of the lifting assembly, gradually leaves the water surface, and then moves to the unloading area under the action of the walking wheel assembly; there is a downstream conveying device in the unloading area; when the suspension tank reaches the area where the conveying device is located, the lifting rope on one side begins to pull up under the action of the lifting assembly, and the lifting rope on the other side gradually lowers under the action of the lifting assembly, and under the action of gravity, the overturning and flipping unloading is completed; after complete unloading, the lifting assembly moves to restore the balance of the suspension tank, and enters the next circulating heat recovery area through the circular track.

9. The device and method for indirectly water cooling high-temperature slag in a suspension tank as claimed in claim 8, characterized in that: When loading, open the low-temperature slag bin through the low-temperature slag control valve to start releasing cold material. After the cold material fills the bottom of the suspension tank, close the low-temperature slag control valve, and then release hot material from the high-temperature slag bin. After the hot material is filled to the specified position, close the high-temperature slag control valve.

10. The device and method for indirectly water cooling high-temperature slag in a suspension tank as claimed in claim 9, characterized in that: According to different types of slag and different cooling rate requirements, the load capacity of the suspension tank, the speed and time of the suspension tank in the cooling zone, the temperature of the cooling water, and the water volume are adjusted to meet the process requirements of achieving different cooling rates in the same system.

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