High-temperature liquid steel slag treatment method and device

Abstract

The invention relates to the field of steel slag treatment equipment, in particular to a high-temperature liquid steel slag treatment method and device.The treatment method is executed through the treatment device.The treatment method comprises the steps that high-temperature liquid steel slag is poured into a closed container, and heat and heat radiation in the container are absorbed through a cooling working medium; a mechanical crushing device is arranged in the container, then the container is rotated in a reciprocating mode, the high-temperature steel slag in the container and the mechanical crushing device generate relative motion, and large steel slag blocks are crushed into small steel slag blocks through mechanical impact force applied to the high-temperature steel slag by the mechanical crushing device; and finally, discharging the cooled steel slag from the container. According to the embodiment of the invention, the steel slag is put into the container to be repeatedly vibrated, so that the steel slag is crushed by the mechanical crushing device, and meanwhile, the cooling working medium exchanges heat with the steel slag and the container, so that the waste heat of the steel slag is recovered, and the structure of the container is protected.

Description

Technical Field

[0001] The present invention relates to the field of steel slag treatment equipment, and particularly relates to a method for treating high-temperature liquid steel slag.

[0002] The present invention also relates to a device for treating high-temperature liquid steel slag. Background Art

[0003] Steel slag is a by-product in the steelmaking process, with a temperature as high as about 1500 °C. Direct discharge not only causes energy waste, but also pollutes the environment. Moreover, the discharged steel slag is large in volume and various in shape, and it is difficult to recycle after cooling. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and a device for treating high-temperature liquid steel slag, so as to solve the problems that direct discharge of steel slag not only causes energy waste, but also pollutes the environment, and the discharged steel slag is large in volume and various in shape, and it is difficult to recycle after cooling.

[0005] To solve the above technical problems, the present invention specifically provides the following technical solutions:

[0006] The present application provides a device for treating high-temperature liquid steel slag, including: a container, a horizontal rotary table, a conduction heat exchanger, a radiation heat exchanger, and a mechanical crushing device; the container is a hollow rotating body, a multi-functional through hole is provided at the top of the container, a feed port is provided in the middle of the container, and an openable and closable cover door is installed on the feed port; the horizontal rotary table is used to place and drive the container to rotate around a horizontal axis, and the rotation axis of the container is coaxial with the axis of the container; the conduction heat exchanger is arranged inside the interlayer of the container wall, and circulating cooling water inside the conduction heat exchanger cools the wall of the container; the radiation heat exchanger is fixed inside the container and does not rotate synchronously with the container, and a phase change working fluid is provided inside the radiation heat exchanger, and the phase change working fluid absorbs heat through phase change; the mechanical crushing device is arranged at the bottom of the container, and generates relative movement with the high-temperature steel slag inside the container when the container performs a reciprocating rotational movement.

[0007] Further, the container includes a rotatable tank body and a fixed sealing cover, the tank body includes an upper part of the tank body and a lower part of the tank body which are detachably connected to each other, the sealing cover is arranged at both ends of the tank body, a dynamic sealing structure is provided between the tank body and the sealing covers at both ends, the tank body is placed on the horizontal rotary table, the sealing cover is fixedly connected to the radiation heat exchanger, and the sealing cover is connected to a fixed member through a bracket.

[0008] Furthermore, the conduction heat exchanger includes a circulation pipeline disposed inside the interlayer on the wall surface of the container, and the circulation pipeline is used to circulate a cooling working medium between the external environment and the interlayer; the radiation heat exchanger includes a phase change working medium inlet and a phase change working medium outlet. The phase change working medium inlet introduces a liquid working medium from outside the container. The liquid working medium forms a gaseous working medium after being heated by thermal radiation inside the radiation heat exchanger, and the gaseous working medium leaves the radiation heat exchanger through the phase change working medium outlet; the mechanical crushing device includes a plurality of crushing teeth disposed at the bottom of the container, and the crushing teeth are arranged along the circumferential direction and / or the axial direction of the bottom of the container. A cooling water channel is provided inside the crushing teeth, so that the crushing teeth can be cooled by circulating cooling water being introduced.

[0009] Furthermore, a high-temperature reflective material is provided on the upper part of the inner wall of the container, and the high-temperature reflective material is used to reflect the thermal radiation of the steel slag to the radiation heat exchanger.

[0010] Furthermore, it further includes: a convective heat exchange ventilation duct, and the convective heat exchange ventilation duct is used to convey high-pressure air into the container. The high-pressure air conducts convective heat exchange with the steel slag, and the generated high-temperature hot air is discharged through the multi-functional through hole.

[0011] Furthermore, the convective heat exchange ventilation duct includes an air supply duct and an exhaust duct. The air supply duct is fixed inside the container and does not rotate synchronously with the container. The air supply duct includes a cold air inlet and a cold air outlet. The cold air inlet introduces high-pressure air from outside the container, and the cold air outlet is used to spray high-pressure air into the container to forcibly convectively cool the high-temperature steel slag. One end of the exhaust duct is a hot air inlet, and the hot air inlet covers the outside of the multi-functional through hole. The end shape of the hot air inlet matches the surface shape of the container, and the size of the hot air inlet allows the multi-functional through hole to reciprocally rotate with the container without exceeding the covering range of the hot air inlet.

[0012] This application provides a method for treating high-temperature molten steel slag, using a high-temperature molten steel slag treatment device. The method for treating high-temperature molten steel slag includes the following steps: S1, pouring high-temperature molten steel slag into a closed container; S2, cooling and crushing the high-temperature molten steel slag; S3, discharging the cooled steel slag from the container; wherein, step S2 includes: S21, cooling the steel slag: using a cooling working medium to absorb the heat and thermal radiation inside the container, so that the temperature of the steel slag drops to the target range; S22, crushing the steel slag: arranging the mechanical crushing device inside the container, and then shaking the container, so that the high-temperature steel slag inside the container generates relative movement with the mechanical crushing device, and the large pieces of steel slag are broken into small pieces of steel slag by the mechanical impact force exerted by the mechanical crushing device on the high-temperature steel slag.

[0013] Further, step S21 includes: S211, convective heat transfer: using cooling water to cool the wall of the container, the wall of the container exchanges heat with the steel slag, and the generated high-temperature hot water is guided to a waste heat boiler for recycling; S212, radiative heat transfer: arranging the radiation heat exchanger inside the container, using the thermal radiation inside the container to heat the working medium inside the radiation heat exchanger, and the generated steam is recycled.

[0014] Further, step S21 further includes: S213, convective heat transfer: guiding cold air to the inside of the container, the cold air exchanges heat with the steel slag, and the generated high-temperature hot air is guided to a waste heat boiler for recycling.

[0015] The present application provides a method for treating high-temperature liquid steel slag, including at least three high-temperature liquid steel slag treatment devices. The method for treating high-temperature liquid steel slag includes the following steps: the gaseous working medium discharged from each phase change working medium outlet is merged into a common steam main pipe, the high-temperature hot air discharged from each exhaust pipe is merged into a common hot air main pipe, and each high-temperature liquid steel slag treatment device operates with a staggered peak.

[0016] The present application has the following beneficial effects compared with the prior art:

[0017] In the embodiment of the present invention, the steel slag is placed inside the container and shaken repeatedly, so that the steel slag is broken by a mechanical crushing device. At the same time, a cooling working medium is used to exchange heat with the steel slag and the container. On the one hand, the waste heat of the steel slag is recovered, and on the other hand, the structure of the container is protected. Brief Description of the Drawings

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0019] Figure 1 A perspective view of a second embodiment of the present invention;

[0020] Figure 2 Another perspective view of a second embodiment of the present invention;

[0021] Figure 3 A top view of a second embodiment of the present invention;

[0022] Figure 4 For Figure 3 A cross-sectional view taken along the A-A direction of

[0023] Figure 5 ForFigure 3 Cross-sectional view in the B-B direction;

[0024] Figure 6 is Figure 5 Schematic diagram of another working condition of, in which the tank body rotates clockwise by 45 degrees;

[0025] Figure 7 is Figure 5 Schematic diagram of another working condition of, in which the tank body rotates counterclockwise by 45 degrees;

[0026] Figure 8 is Figure 5 Schematic diagram of another working condition of, in which the tank body rotates 180 degrees; Figure 9 Assembly drawing of the second embodiment of the present invention;

[0027] The reference numerals in the figure respectively represent the following:

[0028] 1 - Container; 11 - Tank body; 111 - Multifunctional through hole; 112 - Feed inlet; 113 - Upper part of the tank body; 114 - Lower part of the tank body; 12 - Sealing cover; 13 - Bracket; 14 - Cover door; 2 - Horizontal rotary table; 21 - Load-bearing wheel; 22 - Gear ring; 23 - Gear; 24 - Motor; 3 - Circulation pipeline; 4 - Radiation heat exchanger; 41 - Phase change working fluid inlet; 42 - Phase change working fluid outlet; 5 - Crushing teeth; 6 - Convective heat exchange ventilation pipeline; 61 - Air supply pipe; 611 - Cold air inlet; 612 - Cold air outlet; 62 - Exhaust pipe; 621 - Hot air inlet. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] (The first embodiment)

[0031] Since the structures of the first embodiment and the second embodiment are basically the same, the first embodiment can be understood by referring to Figures 1 to 9 this.

[0032] To solve the above problems, the present invention provides a method for treating high-temperature liquid steel slag, which aims to solve the problems in aspects such as steel slag cooling, waste heat recovery, and crushing efficiency in the prior art. The treatment method includes the following steps:

[0033] S1, referring to Figure 5 , pour the high-temperature liquid steel slag into a closed container 1, and the capacity of the steel slag does not exceed one-fourth of the volume of the container 1.

[0034] S2, reference Figure 6 and Figure 7 , cool and crush the high-temperature liquid steel slag.

[0035] S3, reference Figure 8 , discharge the cooled steel slag from container 1.

[0036] Among them, step S2 includes the following two steps:

[0037] S21, cool the steel slag: Use a cooling working medium to absorb the heat and thermal radiation inside container 1, so that the temperature of the steel slag drops to the target range (50°C - 300°C).

[0038] S22, crush the steel slag: Set a mechanical crushing device inside container 1, and then rotate container 1 reciprocally, so that the high-temperature steel slag inside container 1 makes relative movement with the mechanical crushing device, and the large pieces of steel slag are crushed into small pieces (diameter ≤ 50 mm) of steel slag by the mechanical impact force exerted by the mechanical crushing device on the high-temperature steel slag.

[0039] Among them, step S21 includes:

[0040] S211, conduction heat transfer: Use cooling water (at normal temperature) to cool the wall of container 1, the wall of container 1 exchanges heat with the steel slag, and the generated high-temperature hot water is guided to a waste heat boiler for recovery and utilization.

[0041] S212, radiation heat transfer: Set a radiation heat exchanger 4 inside container 1, use the thermal radiation inside container 1 to heat the working medium inside the radiation heat exchanger 4, and the generated steam is recovered and utilized.

[0042] On the other hand, the high-temperature liquid steel slag treatment method needs to be executed using a corresponding treatment device. The present invention provides a high-temperature liquid steel slag treatment device.

[0043] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the treatment device includes: container 1, horizontal rotary table 2, conduction heat exchanger, radiation heat exchanger 4 and mechanical crushing device.

[0044] Container 1 is a hollow horizontal cylindrical rotating body for placing high-temperature liquid steel slag. A multi-functional through hole 111 is provided at the top (outer circumferential surface) of container 1, and the multi-functional through hole 111 is used to discharge hot air and steel slag. A feed inlet 112 is provided in the middle (outer circumferential surface) of container 1, and a switchable cover door 14 is installed on the feed inlet 112, which is opened during feeding and closed after feeding is completed.

[0045] The horizontal rotary table 2 is used to place and drive the container 1 to rotate around a horizontal axis, and the rotation axis of the container 1 is coaxial with the axis of the container 1. When feeding steel slag into the interior of the container 1, the multi-functional through-hole 111 is located at the top of the container 1; when processing the steel slag inside the container 1, the multi-functional through-hole 111 swings back and forth at the top of the container 1 as the container 1 rotates reciprocally, and the multi-functional through-hole 111 can be closed or not; when discharging slag, the multi-functional through-hole 111 is located at the bottom of the container 1, so as to discharge the steel slag inside the container 1.

[0046] The conduction heat exchanger is arranged inside the sandwich layer of the wall surface of the container 1. On the one hand, it absorbs the heat of the steel slag through heat conduction, and on the other hand, it protects the container 1 itself from being damaged by high temperature.

[0047] The radiation heat exchanger 4 is fixed inside the container 1 through the bracket 13 and does not rotate synchronously with the container 1. The interior of the radiation heat exchanger 4 is equipped with a phase change working medium, and the phase change working medium absorbs heat through phase change. The position of the radiation heat exchanger 4 is within the range of the sealing cover 12.

[0048] The mechanical crushing device is arranged at the bottom of the container 1. When the container 1 performs a reciprocating rotational motion, it generates a relative motion with the high-temperature steel slag inside the container 1, and applies a mechanical impact force to the high-temperature steel slag, so as to crush the large pieces of steel slag into small pieces of steel slag.

[0049] Reference Figure 4 、 Figure 5 Preferably, the container 1 is a horizontal treatment tank, and the shape of the treatment tank is a spindle shape with a large diameter in the middle and small and concentric diameters at both ends. The treatment tank includes a rotatable tank body 11 and a fixed sealing cover 12. The sealing cover 12 is arranged at both ends of the tank body 11. The tank body 11 is placed on the horizontal rotary table 2. The sealing cover 12 is fixedly connected to the bracket 13 for installing the radiation heat exchanger 4, and the bracket 13 penetrates through the sealing cover 12 and is connected to a fixed member (such as a frame, a building).

[0050] A dynamic sealing structure (such as a sealing ring) is provided between the tank body 11 and the sealing covers 12 at both ends to ensure good sealing performance when the tank body 11 rotates and prevent high-temperature hot air from being discharged through both ends of the tank body 11.

[0051] Preferably, the multi-functional through-hole 111 is arranged in the middle of the upper part of the tank body 11, and the opening size is based on facilitating slag discharge.

[0052] Reference Figure 9, More preferably, the tank body 11 includes an upper tank body 113 and a lower tank body 114 that are detachably connected to each other. The upper tank body 113 accounts for about one-third of the overall height of the tank body 11 and does not directly contact the steel slag when slag is not discharged. The lower tank body 114 accounts for about two-thirds of the overall height and is used to accommodate and process the steel slag. The upper tank body 113 and the lower tank body 114 are tightly connected and fixed by flanges and bolts. When needed, the upper tank body 113 can be opened to clean the interior of the tank body 11, repair the radiation heat exchanger 4 and the mechanical crushing device.

[0053] Reference Figure 2 、 Figure 5 , Preferably, the horizontal rotary table 2 includes two groups of load-bearing wheels 21 and a driver. The two groups of load-bearing wheels 21 are respectively arranged on both sides of the container 1. Each group of load-bearing wheels 21 includes at least two coaxial load-bearing wheels 21. The container 1 is supported by four load-bearing wheels 21, enabling the container 1 to rotate. The driver includes a gear ring 22 coaxially arranged on the surface of the container 1 and a motor 24 transmission-connected to the gear ring 22 through a gear 23. The motor 24 drives the container 1 to rotate clockwise or counterclockwise and reciprocate through the gear 23 and the gear ring 22.

[0054] Preferably, the load-bearing wheel 21 is a roller bearing.

[0055] Reference Figures 5 to 8 , Preferably, the conduction heat exchanger includes a circulation pipeline 3 arranged inside the sandwich of the wall surface of the container 1. The circulation pipeline 3 is used to circulate cooling water between the external environment and the sandwich, so that, on the one hand, the container 1 absorbs the heat of the steel slag through the cooling water, and on the other hand, the container 1 is cooled by the cooling water to protect the container 1 itself from being damaged by high temperature.

[0056] Reference Figure 4 , Preferably, the radiation heat exchanger 4 is a tubular heat exchanger. The tubular heat exchanger includes a phase change working medium inlet 41 and a phase change working medium outlet 42. The phase change working medium inlet 41 introduces a liquid working medium (such as water) from the outside of the container 1. The liquid working medium forms a gaseous working medium (such as steam) after being heated by thermal radiation inside the tubular heat exchanger. The gaseous working medium leaves the tubular heat exchanger through the phase change working medium outlet 42.

[0057] More preferably, a high-temperature reflective material is provided on the upper part of the inner wall of the container 1 to reflect the thermal radiation of the steel slag to the radiation heat exchanger 4.

[0058] Reference Figure 4 、 Figure 5, Preferably, the mechanical crushing device includes a plurality of crushing teeth 5 provided at the bottom of the container 1. The crushing teeth 5 are arranged along the circumferential and / or axial direction of the bottom of the container 1. The crushing teeth 5 can withstand the impact of steel slag, and a cooling water channel is provided inside the crushing teeth 5, so that the crushing teeth 5 can be fed with circulating cooling water to cool down, so as to ensure the normal operation of the crushing teeth 5 in a high-temperature and impact environment.

[0059] More preferably, the circulating pipeline 3 of the conduction heat exchanger is not only arranged inside the sandwich layer of the wall of the container 1, but also arranged inside each crushing tooth 5, so that the conduction heat exchanger can not only cool the wall of the container 1, but also cool the crushing teeth 5.

[0060] (Second Embodiment)

[0061] The difference between the processing method of the second embodiment and the first embodiment is that: in step S21, steps of convective heat transfer and waste heat recovery are added.

[0062] Specifically, step S21 further includes step S213, convective heat transfer: guiding cold air (room temperature) into the interior of the container 1, the cold air exchanges heat with the steel slag, and the generated high-temperature hot air (500-700 °C) is guided to the waste heat boiler for recovery and utilization.

[0063] On the other hand, the processing method of the second embodiment also needs to be executed by using a corresponding processing device.

[0064] Reference Figure 4 、 Figure 5 , the difference between the second embodiment and the first embodiment is that the processing device further includes: a convective heat transfer ventilation duct 6, and the convective heat transfer ventilation duct 6 is used to convey high-pressure air into the interior of the container 1. The high-pressure air exchanges convective heat with the steel slag, and the generated high-temperature hot air is discharged through the multi-functional through hole 111.

[0065] Preferably, the convective heat transfer ventilation duct 6 includes an air supply duct 61 and an air discharge duct 62. The air supply duct 61 is fixed inside the container 1 through a bracket 13 and does not rotate synchronously with the container 1. The air supply duct 61 includes a cold air inlet 611 and a cold air outlet 612. The cold air inlet 611 introduces high-pressure air from the outside of the container 1. A high-pressure air nozzle is installed at the cold air outlet 612. The high-pressure air nozzle is used to spray high-pressure air into the interior of the container 1. The blowing direction of the high-pressure air faces the bottom of the container 1 and the radiation heat exchanger 4. On the one hand, the high-pressure air performs forced convection cooling on the high-temperature steel slag, and on the other hand, the high-pressure air blows the surface dust of the radiation heat exchanger 4 to improve the heat transfer performance of the radiation heat exchanger 4. One end of the air discharge duct 62 is a hot air inlet 621, and the hot air inlet 621 covers the outside of the hot air outlet (multi-functional through hole 111). The high-temperature hot air inside the container 1 is discharged from the container 1 through the multi-functional through hole 111 and the air discharge duct 62.

[0066] ReferenceFigure 4 , Figure 5 , more preferably, the end shape of the hot air inlet 621 conforms to the surface shape of the container 1, and the size of the hot air inlet 621 allows the multifunctional through hole 111 to rotate reciprocally with the container 1 without exceeding the covering range of the hot air inlet 621. A graphite sealing tape is used to maintain a tight fit between the hot air inlet 621 and the container 1, thereby preventing the high-temperature hot air from overflowing through the gap between the hot air inlet 621 and the container 1. The other end of the exhaust pipe 62 is connected to the induced draft system of the waste heat boiler.

[0067] (Third Embodiment)

[0068] On the other hand, since the temperature of the steel slag inside the container 1 gradually decreases, when a single high-temperature liquid steel slag treatment device is operating, the calorific value of the steam and hot air (optional) supplied to the waste heat boiler is unstable. Especially when the temperature of the steel slag inside the container 1 is too low, the treatment device can hardly supply steam and hot air (optional) to the waste heat boiler.

[0069] To solve the above problems, the present invention also provides a high-temperature liquid steel slag treatment system. The treatment system includes at least three parallel treatment devices, each treatment device is connected to a waste heat boiler, and each treatment device operates with a staggered peak. The specific operation mode is as described below.

[0070] Assume that the steel plant produces a can of high-temperature steel slag every 30 minutes, and the standard time for a single device to process a can of steel slag is 90 minutes.

[0071] 0 minutes: The first device loads high-temperature steel slag and starts operating, generating high-temperature steam and hot air.

[0072] 30 minutes: The second device loads a new can of high-temperature steel slag and starts operating.

[0073] 60 minutes: The third device loads a new can of high-temperature steel slag and starts operating.

[0074] Heat stability mechanism: The steam and hot air generated by each treatment device are merged into a common steam main pipe and a hot air main pipe. When the system runs for 60 minutes and later, the three treatment devices are in different working stages at the same time. The steel slag in the first treatment device has been processed for 60 minutes and is in a low-temperature heat release stage (for example, 600°C); the steel slag in the second treatment device has been processed for 30 minutes and is in a medium-temperature heat release stage (for example, 1000°C); the third treatment device has just started operating and is in a high-temperature heat release stage (for example, 1500°C). After the hot air and steam output by the three treatment devices are mixed, the total calorific value fluctuates less and tends to be stable, thereby providing a relatively stable heat source input for the waste heat boiler and facilitating the efficient and stable operation of the waste heat boiler.

[0075] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the embodiments of the present invention.

Claims

1. A high-temperature liquid steel slag treatment device, characterized in that it includes: a container (1), a horizontal rotary table (2), a conduction heat exchanger, a radiation heat exchanger (4) and a mechanical crushing device; the container (1) is a hollow rotating body, a multi-functional through hole (111) is provided at the top of the container (1), a feed port (112) is provided in the middle of the container (1), and an openable and closable cover door (14) is installed on the feed port (112); the horizontal rotary table (2) is used to place and drive the container (1) to rotate around a horizontal axis, and the rotation axis of the container (1) is coaxial with the axis of the container (1); the conduction heat exchanger is arranged inside the sandwich layer of the wall surface of the container (1), and cooling water is circulated inside the conduction heat exchanger to cool the wall surface of the container (1); the radiation heat exchanger (4) is fixed inside the container (1) and does not rotate synchronously with the container (1), and the inside of the radiation heat exchanger (4) is provided with a phase change working medium, and the phase change working medium absorbs heat through phase change; the mechanical crushing device is arranged at the bottom of the container (1), and generates relative movement with the high-temperature steel slag inside the container (1) when the container (1) performs reciprocating rotational motion.

2. The high-temperature liquid steel slag treatment device according to claim 1, characterized in that the container (1) includes a rotatable tank body (11) and a fixed sealing cover (12), the tank body (11) includes an upper tank body and a lower tank body that are detachably connected to each other, the sealing cover (12) is arranged at both ends of the tank body (11), a dynamic sealing structure is provided between the tank body (11) and the sealing covers (12) at both ends, the tank body (11) is placed on the horizontal rotary table (2), the sealing cover (12) is fixedly connected to the radiation heat exchanger (4), and the sealing cover (12) is connected to a fixed member through a bracket (13).

3. The high-temperature liquid steel slag treatment device according to claim 2, characterized in that the conduction heat exchanger includes a circulation pipeline (3) arranged inside the sandwich layer of the wall surface of the container (1), and the circulation pipeline (3) is used to circulate the cooling working medium between the external environment and the sandwich layer; the radiation heat exchanger (4) includes a phase change working medium inlet (41) and a phase change working medium outlet (42), the phase change working medium inlet (41) introduces liquid working medium from the outside of the container (1), the liquid working medium forms gaseous working medium after being heated by thermal radiation inside the radiation heat exchanger (4), and the gaseous working medium leaves the radiation heat exchanger (4) through the phase change working medium outlet (42); the mechanical crushing device includes a plurality of crushing teeth (5) arranged at the bottom of the container (1), the crushing teeth (5) are arranged along the circumferential and / or axial direction of the bottom of the container (1), and a cooling water channel is arranged inside the crushing teeth (5) so that the crushing teeth (5) can be passed through with circulating cooling water for cooling.

4. The high-temperature liquid steel slag treatment device according to claim 2, characterized in that The upper part of the inner wall of the container (1) is provided with a high-temperature reflective material, and the high-temperature reflective material is used to reflect the thermal radiation of the steel slag to the radiation heat exchanger (4).

5. The high-temperature liquid steel slag treatment device according to claim 2, characterized in that further comprising a convective heat transfer ventilation duct (6), the convective heat transfer ventilation duct (6) is used to convey high-pressure air into the interior of the container (1), the high-pressure air exchanges convective heat with the steel slag, and the generated high-temperature hot air is discharged through the multi-functional through hole (111).

6. The high-temperature liquid steel slag treatment device according to claim 5, characterized in that the convective heat transfer ventilation duct (6) comprises an air supply duct (61) and an air discharge duct (62), the air supply duct (61) is fixed inside the container (1) and does not rotate synchronously with the container (1), the air supply duct (61) comprises a cold air inlet (611) and a cold air outlet (612), the cold air inlet (611) introduces high-pressure air from the outside of the container (1), the cold air outlet (612) is used to spray high-pressure air into the interior of the container (1) to forcibly convectively cool the high-temperature steel slag, one end of the air discharge duct (62) is a hot air inlet (621), the hot air inlet (621) covers the outside of the multi-functional through hole (111), the end shape of the hot air inlet (621) coincides with the surface shape of the container (1), and the size of the hot air inlet (621) allows the multi-functional through hole (111) to reciprocally rotate with the container (1) without exceeding the covering range of the hot air inlet (621).

7. A high-temperature liquid steel slag treatment method, characterized in that using the high-temperature liquid steel slag treatment device according to any one of claims 1-6, the high-temperature liquid steel slag treatment method comprises the following steps S1, pouring the high-temperature liquid steel slag into a closed container (1); S2, cooling and crushing the high-temperature liquid steel slag; S3, discharging the cooled steel slag from the container (1); wherein, step S2 comprises S21, cooling the steel slag: using a cooling medium to absorb the heat and thermal radiation inside the container (1) to lower the temperature of the steel slag to the target range; S22, crushing the steel slag: arranging the mechanical crushing device inside the container (1), and then reciprocally rotating the container (1) so that the high-temperature steel slag inside the container (1) has a relative movement with the mechanical crushing device, and crushing the large pieces of steel slag into small pieces of steel slag by the mechanical impact force exerted on the high-temperature steel slag by the mechanical crushing device.

8. The high-temperature liquid steel slag treatment method according to claim 7, characterized in that step S21 comprises S211, conductive heat transfer: using cooling water to cool the wall surface of the container (1), the wall surface of the container (1) exchanges heat with the steel slag, and the generated high-temperature hot water is guided to a waste heat boiler for recovery and utilization; S212, Radiative heat transfer: The radiative heat exchanger (4) is arranged inside the container (1), and the working fluid inside the radiative heat exchanger (4) is heated by the thermal radiation inside the container (1), and the generated steam is recycled.

9. A method for treating high-temperature liquid steel slag according to claim 8, characterized in that Step S21 further includes: S213, Convective heat transfer: Cold air is guided into the interior of the container (1), and the cold air exchanges heat with the steel slag, and the generated high-temperature hot air is guided to a waste heat boiler for recycling.

10. A method for treating high-temperature liquid steel slag, characterized in that It includes at least three high-temperature liquid steel slag treatment devices as described in claim 6, and the high-temperature liquid steel slag treatment method includes the following steps: The gaseous working fluids discharged from each of the phase change working fluid outlets (42) are all merged into a common steam main pipe, the high-temperature hot air discharged from each of the exhaust air pipes (62) is all merged into a common hot air main pipe, and each of the high-temperature liquid steel slag treatment devices operates with a staggered peak.

Images