Slag Cooling Treatment Equipment

Abstract

This invention provides a slag cooling treatment device, including a rotating drum, a slag tank, a gas-liquid water spray device, and a cooling water spray device. The slag tank is used to guide molten slag into the rotating drum; the gas-liquid water spray device is used to initially crush and cool the molten slag flowing into the rotating drum; the cooling water spray device is used to further cool the molten slag; a ball-blocking grid is provided at a cross-sectional position inside the rotating drum, dividing the interior of the rotating drum into a high-temperature zone and a low-temperature zone. Metal balls are provided in the high-temperature zone to crush and cool the molten slag in the high-temperature zone; slag discharge holes are provided along the circumferential direction on the drum wall of the rotating drum, for discharging the cooled solid slag from the rotating drum. Using this invention, problems such as insufficient cooling rate leading to crystallization and high slag moisture content in existing rapid cooling treatment devices can be solved.

Description

Technical Field

[0001] This invention relates to the field of smelting slag treatment technology, and more specifically, to a slag cooling treatment device. Background Technology

[0002] Currently, the common method for rapid cooling of molten slag in non-ferrous smelting is to directly pour the liquid slag into a pre-built water quenching tank. Occasionally, water is sprayed to quickly cool the slag as it flows down. The cooled slag settles at the bottom of the water quenching tank, and after a certain amount of solid slag has accumulated in the tank, it is scooped out of the tank and stored using a grab bucket or forklift.

[0003] The aforementioned water quenching treatment method for non-ferrous smelting slag is a crude process, with almost all water quenching operations conducted in the open air. Steam and wastewater generated during water quenching are freely discharged, and sulfur and heavy metals in the slag can cause environmental hazards such as H2S release and heavy metal leaching into the aqueous solution. Because the slag is poured directly into the water tank, rapid cooling occurs on the surface, but the interior remains at a high temperature. This results in a vitrified exterior but a large amount of crystalline phase inside the solid slag, which is detrimental to the vitrification effect and subsequent resource utilization. Furthermore, the large amount of water vapor generated creates a harsh working environment. Some slag, due to insufficient cooling, can also produce mineral fibers that disperse into the air, harming the respiratory system of factory personnel and adhering to factory buildings, affecting aesthetics. In addition, the large water consumption and high slag moisture content have numerous adverse effects on the subsequent utilization of the water-quenched slag, the factory environment, the ecological environment, and the working environment.

[0004] Furthermore, the processing devices disclosed in CN107557505A, WO2012 / 024835A1, and WO2021 / 223543A1 are mainly used for cooling and crushing steel slag. Due to the high melting temperature, high viscosity, poor fluidity, tendency to agglomerate, high hardness of the solid slag, and high density of steel slag, the structure of the processing equipment cannot be too complex. It also requires slag removal from the storage tanks, placing high demands on the materials used in the equipment. In addition, cooled steel slag contains almost no glassy phase and is composed entirely of various crystalline phases.

[0005] In order to solve the existing problems, the present invention urgently needs to provide a slag cooling treatment device. Summary of the Invention

[0006] In view of the above problems, the purpose of this invention is to provide a slag cooling treatment device to solve the problems of insufficient cooling rate, crystallization, and high slag moisture content in existing rapid cooling treatment devices.

[0007] The present invention provides a slag cooling treatment device, comprising a rotating cylinder, a slag tank extending into the rotating cylinder, a gas-liquid water spraying device extending into the interior of the rotating cylinder, and a cooling water spraying device, wherein...

[0008] The slag tank is used to guide slag into the rotating drum;

[0009] The gas-liquid water spray device is used to initially crush and cool the molten slag flowing into the rotating drum; the cooling water spray device is used to further cool the molten slag.

[0010] A ball-blocking grid is provided at the cross-sectional position inside the rotating cylinder, which divides the interior of the rotating cylinder into a high-temperature zone and a low-temperature zone. Metal balls are provided in the high-temperature zone to crush and cool the molten slag in the high-temperature zone.

[0011] A slag discharge hole is provided on the wall of the rotating cylinder along the circumferential direction. The slag discharge hole is used to discharge the cooled solid slag from the rotating cylinder.

[0012] Furthermore, a preferred structure is that a slot is provided on the rotating cylinder, through which the slag tank extends into the rotating cylinder.

[0013] Furthermore, in a preferred configuration, the gas-liquid water spraying device is disposed at one end of the slag tank that extends into the rotating cylinder, wherein...

[0014] The gas-liquid spraying device uses pressurized air to spray cooling water onto the molten slag flow, thereby breaking up and cooling the molten slag during its descent.

[0015] Furthermore, in a preferred configuration, the cooling water spray device is arranged axially inside the rotating cylinder, wherein...

[0016] The cooling water spray device includes a water spray pipe and water spray holes distributed on the water spray pipe. The water spray holes spray water in the axial direction and the diameter direction of the water spray pipe, respectively.

[0017] Furthermore, in a preferred configuration, the diameter of the metal ball is larger than the diameter of the ball-blocking grid and the slag discharge hole.

[0018] Furthermore, a preferred structure is that the metal ball is a non-uniform diameter metal ball, and the surface of the metal ball is uniformly provided with concave holes.

[0019] Furthermore, in a preferred configuration, the ball-blocking grid is positioned at a cross-sectional location one-quarter of the distance from one end of the rotating cylinder, the low-temperature region occupies one-quarter of the interior space of the rotating cylinder, and the high-temperature region occupies three-quarters of the interior space of the rotating cylinder.

[0020] Furthermore, a preferred configuration is that the ball-blocking grid is used to prevent the metal ball from entering the low-temperature region.

[0021] Furthermore, a preferred structure is that the slag discharge hole is a screen structure, and the number of screen structures is at least three, which are evenly arranged along the circumference of the rotating cylinder.

[0022] Furthermore, a preferred structure is that a support ring is provided on the outer wall of the rotating cylinder, the support ring being used to support the rotating cylinder.

[0023] Furthermore, in a preferred configuration, the axial direction of the rotating cylinder is inclined at the same angle as the horizontal direction, and the height of the molten slag feed end is higher than the height of the solid slag discharge end.

[0024] As can be seen from the above technical solution, the slag cooling treatment device provided by the present invention performs initial crushing and cooling of the slag flowing into the rotating drum through a gas-liquid water spray device; further cooling of the slag through a cooling water spray device; and cooling of the slag through non-uniform diameter metal balls. In the tumbling process, the device can crush the slag, but at the same time, it does not grind the solid slag into powder, thereby solving the problems of insufficient cooling speed, crystallization, and high slag moisture content in existing rapid cooling treatment devices.

[0025] To achieve the foregoing and related objectives, one or more aspects of the invention include the features that will be described in detail below. The following description and accompanying drawings illustrate certain exemplary aspects of the invention. However, these aspects indicate only a few of the various ways in which the principles of the invention can be used. Furthermore, the invention is intended to encompass all such aspects and their equivalents. Attached Figure Description

[0026] Other objects and results of the invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings. In the drawings:

[0027] Figure 1 This is a schematic diagram of the internal structure of a slag cooling treatment device according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the external structure of the slag cooling treatment apparatus according to an embodiment of the present invention;

[0029] Figure 3 For along Figure 2 A cross-sectional schematic diagram of II.

[0030] The reference numerals in the accompanying drawings include: 1. Rotating cylinder, 2. Slag tank, 3. Gas-liquid water spray device, 4. Cooling water spray device, 5. Metal ball, 6. Ball-blocking grid, 7. Slag discharge hole, 8. Support ring, 9. Slag conveying belt.

[0031] In all the accompanying drawings, the same reference numerals indicate similar or corresponding features or functions. Detailed Implementation

[0032] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details. In other instances, well-known structures and devices are shown in block diagram form for ease of description of one or more embodiments.

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0034] In view of the problems of insufficient cooling speed and high slag moisture content in the existing rapid cooling treatment devices mentioned above, the present invention provides a slag cooling treatment device.

[0035] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0036] To illustrate the structure of the slag cooling treatment apparatus provided by the present invention, Figures 1-3 Exemplary illustrations of the slag cooling treatment device are provided from different perspectives. Specifically, Figure 1 The internal structure of a slag cooling treatment apparatus according to an embodiment of the present invention is shown; Figure 2 The external structure of the slag cooling treatment apparatus according to an embodiment of the present invention is shown; Figure 3 For along Figure 2 The cross-sectional structure of II.

[0037] like Figures 1 to 3As shown in the figure, the slag cooling treatment device provided by the present invention includes a rotating cylinder 1, a slag tank 2 extending into the rotating cylinder 1, a gas-liquid water spray device 3 extending into the rotating cylinder 1, and a cooling water spray device 4. The slag tank 2 is used to guide slag into the rotating cylinder 1; the gas-liquid water spray device 3 is used to initially crush and cool the slag flowing into the rotating cylinder 1; the cooling water spray device 4 is used to further cool the slag. A ball-blocking grid 6 is provided at a cross-sectional position inside the rotating cylinder 1, dividing the interior of the rotating cylinder 1 into a high-temperature zone and a low-temperature zone. Metal balls 5 are provided in the high-temperature zone, and the metal balls 5 crush and cool the slag in the high-temperature zone. A slag discharge hole 7 is provided along the circumferential direction on the cylinder wall of the rotating cylinder 1, and the slag discharge hole 7 is used to discharge the cooled solid slag from the rotating cylinder 1.

[0038] In this embodiment of the invention, a rotating cylinder structure is used to process the molten slag. This multi-method approach, combining mechanical rotation, gravity crushing by metal balls, and rapid cooling via jet spraying, rapidly cools the molten slag. A slot is provided on the rotating cylinder 1, through which the molten slag tank 2 extends into the interior of the rotating cylinder 1. A gas-liquid water spraying device 3 also extends into the end of the rotating cylinder 1 connected to the molten slag tank 2. The gas-liquid water spraying device 3 uses pressurized air to spray cooling water onto the molten slag, crushing and cooling it. A cooling water spraying device 4 is arranged axially inside the rotating cylinder 1. The cooling water spraying device includes a spray pipe and spray holes distributed on the spray pipe, with the spray holes spraying water both axially and diametrically towards the spray pipe.

[0039] Specifically, molten slag flows into one end of the rotating cylinder 1 through the slag trough 2, using a slag chute feeding method, resulting in a large slag cooling capacity. During its flow, the molten slag is rapidly cooled by the gas-liquid water spray device 3 and the cooling water spray device 4, achieving rapid cooling and solidification of the slag surface. This initial cooling process ensures that the molten slag falling into the cylinder does not overheat and affect the metal components inside. The gas-liquid water spray device 3, located behind the slag flow, uses pressurized air to spray cooling water from the nozzle. This spraying method results in high gas-liquid flow velocity and strong impact force. The molten slag is rapidly dispersed into smaller particles by the gas, and its surface is rapidly cooled by the cooling water in the gas-liquid flow and the cooling water sprayed from the cooling water spray device 4 above the cylinder. This method achieves initial crushing and cooling of the slag flow.

[0040] In an embodiment of the present invention, the diameter of the metal ball 5 is larger than the aperture of the ball-blocking grid 6 and the slag discharge hole 7, preventing the metal ball 5 from passing through both (the ball-blocking grid 6 and the slag discharge hole 7). The metal ball 1 is a non-uniform diameter metal ball with uniformly distributed concave holes on its surface. The slag discharge hole 7 is a mesh screen structure, with at least three mesh screen structures, and the slag discharge holes 7 are uniformly distributed along the circumference of the rotating cylinder 1. The ball-blocking grid is used to prevent the metal ball from entering the low-temperature region; the ball-blocking grid is located at a cross-sectional position one-quarter of the distance from one end of the rotating cylinder, the low-temperature region occupies one-quarter of the interior space of the rotating cylinder, and the high-temperature region occupies three-quarters of the interior space of the rotating cylinder.

[0041] Specifically, after the liquid slag is initially cooled, the molten slag falls onto the non-uniform diameter metal balls 5 or solid slag inside the rotating drum 1. During the process of the cooling water spray device 4 continuing to spray water for cooling and the rotating drum 1 rotating, the high-temperature slag inside the drum is rapidly broken and cooled again under the dual action of the solid slag itself and the metal balls 5. At the same time, large pieces of solid slag are also broken into small pieces, releasing the high-temperature solid slag inside and rapidly cooling it, thereby preventing crystallization from occurring in the core of the solid slag due to insufficient cooling.

[0042] As the rotating drum 1 continues to rotate, the solid slag, after being cooled and crushed multiple times, is screened through the slag discharge hole 7 on the drum, while the metal ball 5 remains inside the rotating drum 1 to continue its work. The solid slag screened through the slag discharge hole 7 falls onto the conveying device (slag conveyor belt 9) and is transported to the storage workshop for storage.

[0043] The metal balls 5 used inside the rotating cylinder 1 are non-uniform diameter metal balls with numerous concave holes on their surface. This design increases the contact area for rapid cooling while preventing the solid slag from being ground into powder. Furthermore, this structure prevents the balls from moving towards the rear of the cylinder due to rotation, ensuring they operate primarily in the front section. Additionally, metal balls of appropriate materials and heat treatment methods are selected based on the composition and properties of the solid slag to reduce wear. In short, using non-uniform diameter metal balls increases the contact area for rapid cooling of the molten slag, achieving rapid conduction cooling. It also breaks up solid slag lumps, quickly releasing uncooled portions of the solid slag for further cooling, while simultaneously preventing the metal balls from freely moving backward.

[0044] Specifically, a ball-blocking grid 6, i.e., a metal grid, is welded onto the cross-section at approximately 1 / 4 of the width of the rear end of the rotating cylinder 1. This divides the cylinder body into two parts (a high-temperature zone and a low-temperature zone), preventing metal balls from falling from the high-temperature zone into the low-temperature zone at the rear of the cylinder. This ensures that the grinding balls are only in the high-temperature zone at the front of the cylinder, thus consistently breaking down and rapidly cooling the molten slag poured into the cylinder. Simultaneously, the diameter of the metal ball 5 must be larger than the maximum aperture distance between the metal screen (slag discharge hole 7) inside the cylinder and the ball-blocking grid 6 to prevent the metal ball 5 from falling off the screen, thereby ensuring that the metal ball always operates in the high-temperature zone.

[0045] A cooling water spray device 4 is inserted axially inside the rotating cylinder 1, with spray holes opened in the water pipe direction to spray water for cooling in both the axial direction and the lower diameter direction of the water pipe. Especially in the high-temperature cooling working zone of the cylinder, the large number of spray holes ensures rapid cooling of the molten slag and prevents high-temperature thermal deformation of the cylinder's metal structure. Simultaneously, the water flow rate in the spray pipe can be adjusted to ensure a suitable cooling rate and reduce the loss of free water from inside the cylinder.

[0046] Furthermore, in an embodiment of the present invention, a support ring 8 is provided on the outer wall of the rotating cylinder 1 to support the rotating cylinder 1. During use, the rotating cylinder 1 is positioned at a certain angle to the horizontal direction along its axial direction, and the height of the hot slag feed end is slightly higher than the height of the solid slag discharge end. During the molten slag cooling process, the generated water vapor is collected, cooled, and filtered through pipelines, and the returned water can be reused as molten slag cooling water, avoiding the impact of hot steam escape on the on-site operating environment and achieving water conservation. Simultaneously, by controlling the water flow rate and rotation speed, the free water content of the water-quenched slag discharged from the cylinder can be reduced, and free water loss can be minimized, improving water utilization efficiency. The water-quenched slag can be directly ground without drying, reducing energy consumption.

[0047] In embodiments of the present invention, the molten slag is rapidly cooled in a rotating drum to form water-quenched slag, which is then quickly discharged from the drum and dried using its residual heat. Non-ferrous smelting slags generally have lower melting temperatures and better fluidity, but if cooling is not timely, crystallization can easily occur, resulting in generally low slag activity. To improve activity, it is necessary to increase the glass phase content in the non-ferrous smelting slag, i.e., increase the molten slag cooling rate and reduce the solid slag particle size. However, in the traditional direct water quenching method, although the surface of the molten slag poured into the pool cools and solidifies, the internal temperature of the slag remains high due to its low thermal conductivity. Furthermore, the lack of a molten slag crushing and stirring device in the water quenching pool leads to insufficient heat dissipation within the solid slag, resulting in a high content of crystalline phases inside the solid slag.

[0048] As can be seen from the above embodiments, the slag cooling treatment device provided by the present invention performs initial crushing and cooling of the slag flowing into the rotating drum through a gas-liquid water spray device; further cooling of the slag through a cooling water spray device; and cooling of the slag through non-uniform diameter metal balls. In the tumbling process, it can play a role in crushing the slag, but at the same time, it does not grind the solid slag into powder. This solves the problems of insufficient cooling speed, crystallization, and high slag moisture content in existing rapid cooling treatment devices.

[0049] The slag cooling treatment apparatus according to the present invention has been described above by way of example with reference to the accompanying drawings. However, those skilled in the art should understand that various modifications can be made to the slag cooling treatment apparatus according to the present invention without departing from the scope of the invention. Therefore, the scope of protection of the present invention should be determined by the contents of the appended claims.

Claims

1. A slag cooling treatment device, characterized in that, It includes a rotating cylinder, a slag tank extending into the rotating cylinder, a gas-liquid water spray device extending into the interior of the rotating cylinder, and a cooling water spray device, wherein, The slag tank is used to guide slag into the rotating drum; The gas-liquid water spray device is used to initially crush and cool the molten slag flowing into the rotating drum; the gas-liquid water spray device is located at one end of the molten slag tank that extends into the rotating drum, wherein the gas-liquid water spray device sprays cooling water onto the molten slag flow through pressurized air to crush and cool the molten slag during the falling process. The cooling water spray device is used to further cool the molten slag; the cooling water spray device is arranged axially inside the rotating cylinder. A ball-blocking grid is installed at a cross-sectional position inside the rotating cylinder, dividing the interior of the rotating cylinder into a high-temperature zone and a low-temperature zone. Metal balls are installed in the high-temperature zone to break up and cool the molten slag. The diameter of the metal balls is larger than the aperture of the ball-blocking grid and the slag discharge holes. The ball-blocking grid is a metal grid used to prevent the metal balls from entering the low-temperature zone. The ball-blocking grid is located at a cross-sectional position one-quarter of the way from one end of the rotating cylinder. The low-temperature zone occupies one-quarter of the interior space of the rotating cylinder, and the high-temperature zone occupies three-quarters of the interior space. The metal balls are non-uniform diameter metal balls with uniformly distributed concave holes on their surface. A slag discharge hole is provided on the wall of the rotating cylinder along the circumferential direction. The slag discharge hole is used to discharge the cooled solid slag from the rotating cylinder. The slag discharge hole is a screen structure, and there are at least three screen structures, which are evenly arranged along the circumferential direction of the rotating cylinder. During use, the axial direction of the rotating drum is inclined at the same angle as the horizontal direction, and the height of the molten slag feed end is higher than the height of the solid slag discharge end.

2. The slag cooling treatment apparatus as described in claim 1, characterized in that, A slot is provided on the rotating cylinder, and the slag tank extends into the rotating cylinder through the slot.

3. The slag cooling treatment apparatus as described in claim 1, characterized in that, The cooling water spray device includes a water spray pipe and water spray holes distributed on the water spray pipe. The water spray holes spray water in the axial direction and the diameter direction of the water spray pipe, respectively.

4. The slag cooling treatment apparatus as described in claim 1, characterized in that, A support ring is provided on the outer wall of the rotating cylinder, and the support ring is used to support the rotating cylinder.

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