Device for recovering metal through steel slag reduction

Abstract

The utility model belongs to the technical field of steel slag treatment, and particularly relates to a device for recovering metal from steel slag through reduction. The device for recovering metal through steel slag reduction comprises a reaction tank and a vibration generating device, liquid steel slag to be subjected to reduction reaction is contained in the reaction tank, the reaction tank is arranged on the vibration generating device, and the vibration generating device drives the reaction tank to vibrate. According to the utility model, the reaction tank is arranged on the vibration generation device, so that fine iron powder obtained by a reduction reaction can be gathered into iron particles by adopting vibration treatment after the reduction reaction of liquid steel slag, and the larger the particles are, the lower the oxidation degree is, so that the reduction effect is guaranteed; the problem that the recovery rate is reduced due to the fact that metal iron is oxidized again in the follow-up treatment process is solved.

Description

Technical Field

[0001] This utility model belongs to the field of steel slag treatment technology, specifically relating to a device for reducing and recovering metals from steel slag. Technical Background

[0002] In existing steel slag treatment technologies, even after processes such as pool slag treatment and pressurized hot slag treatment, the steel slag tailings still contain 15-20% iron (calculated as TFe, converter slag), of which FeO accounts for a relatively high proportion. Since FeO cannot be removed by magnetic separation, this results in a waste of ferrous resources. Based on a national annual output of 100 million tons of steel slag, this amounts to approximately 20 million tons of iron resources wasted annually, equivalent to the output of a large steel plant.

[0003] Many domestic scholars are dedicated to researching how to recover this part of the ferrous resources, but most of them remain at the laboratory stage. Chinese patent (publication number CN111850189 A) discloses a device and method for reducing and modifying molten steel slag blast furnace ash, in which the modified silo (6) is set above the feeder (7) and the slag furnace (5) is set below the feeder (7). The feeder (7) is a vibrating feeder with a vibration frequency of 800-1000 rpm, an inclination angle of 15-25 degrees, and an amplitude of 5-10 mm. In this patent, the molten iron in the modified silo is naturally deposited, the feeder (7) is not connected to the modified silo (6), the vibration does not directly act on the liquid slag pot, and it does not mention how to solve the problem of the reduced metallic iron being re-oxidized. In fact, this problem is crucial for the steel slag reduction and iron extraction project. The reduced metallic iron in the steel slag is basically in the form of fine particles. These fine metallic iron particles are very easy to be re-oxidized in subsequent processes such as pool simmering and roller crushing, which leads to the failure of metallic iron recovery. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a device for reducing and recovering metals from steel slag. By placing the reaction vessel on a vibration generator, the liquid steel slag can be vibrated after the reduction reaction to aggregate the fine iron powder obtained from the reduction reaction into iron particles. The larger the particles, the lower the degree of re-oxidation, thereby ensuring the reduction effect and solving the problem of reduced recovery rate caused by the re-oxidation of metallic iron in subsequent processing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An apparatus for reducing and recovering metals from steel slag includes a reaction vessel and a vibration generator. The reaction vessel contains liquid steel slag to be reduced. The reaction vessel is mounted on the vibration generator, which drives the reaction vessel to vibrate.

[0007] Preferably, the reaction vessel and the vibration generating device are detachably connected.

[0008] Preferably, the vibration generating device includes a vibration platform and a mounting base, with the mounting base disposed on the vibration platform; the reaction vessel is mounted on the mounting base.

[0009] Preferably, the mounting base includes a connecting plate, two support plates, and a mounting groove; the connecting plate is horizontally disposed on the vibration platform; each support plate is vertically disposed on the connecting plate; each support plate has a mounting groove at its top, which corresponds to the mounting rods on both sides of the reaction vessel, and the mounting rods are installed into the corresponding mounting grooves.

[0010] Preferably, the system further includes a reinforcing plate, which is inclinedly disposed on the outside of the support plate, and its bottom is fixedly connected to the connecting plate.

[0011] Preferably, the reaction vessel also includes a lid, which is located on top of the reaction vessel.

[0012] Preferably, the can lid is equipped with a stirrer for stirring liquid steel slag, which replaces the traditional gas stirring method with mechanical stirring. This can reduce the rate of temperature loss of the molten steel slag, maintain good fluidity of the molten steel slag, thereby ensuring the reduction effect and improving the recovery rate of metallic iron.

[0013] Preferably, the stirrer includes a motor, a stirring shaft, and a stirring paddle. The motor is located at the top of the tank cover with its output end facing downwards. The stirring shaft is located at the bottom of the tank cover, with its upper end connected to the output end of the motor and its lower end extending downwards into the lower middle part of the reaction vessel. The stirring paddle is located at the lower part of the stirring shaft.

[0014] Preferably, the stirring paddle is a single-layer paddle or a double-layer paddle.

[0015] Preferably, it also includes a capping assembly connected to the top of the can lid for removing or closing the can lid.

[0016] Preferably, the lid-applying assembly is a winch or any other device capable of lifting the can lid.

[0017] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0018] This invention innovatively places the reduction reaction vessel on a vibration generating device, using vibration to enrich fine iron powder in the molten steel slag after the reduction reaction. This causes the fine metallic iron powder obtained from the reduction to continuously sink and aggregate, becoming metal particles or even metal blocks. The larger the particles, the lower the degree of re-oxidation, thus ensuring the reduction effect and solving the problem of steel slag being re-oxidized in subsequent processing, which reduces the metal recovery rate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the mounting base of this utility model;

[0021] Figure 3 This is a structural schematic diagram of Embodiment 2 of the present invention;

[0022] Figure 4 , 5 This is a structural schematic diagram of the can lid and stirrer of this utility model.

[0023] The numbers and names in the diagram are as follows:

[0024] 1-Reaction vessel; 2-Vibration platform; 3-Connecting plate; 4-Support plate; 5-Mounting groove; 6-Mounting rod; 7-Reinforcing plate; 8-Tank cover; 9-Motor; 10-Stirring shaft; 11-Stirring paddle. Detailed Implementation

[0025] To better illustrate this utility model, specific implementation examples are provided. These implementation examples fall within the protection scope of this utility model but do not limit its protection scope.

[0026] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not 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 utility model.

[0027] Example 1

[0028] An apparatus for reducing and recovering metals from steel slag, such as Figure 1As shown, the device includes a reaction vessel 1 and a vibration generating device. The reaction vessel 1 contains liquid steel slag to be reduced. The reaction vessel 1 is mounted on the vibration generating device, which drives the reaction vessel 1 to vibrate. The reaction vessel 1 is a conventional slag vessel with mounting rods 6 on both sides. The vibration generating device includes a vibration platform 2 and a mounting base. The vibration platform 2 can be purchased directly from the market and has a built-in vibration generating component at its bottom. It can generate vibration directly by connecting to a power source and turning on a switch. The mounting base is mounted on the vibration platform 2, and the shape and size of the mounting base are adapted to the reaction vessel 1. The reaction vessel 1 is detachably mounted on the mounting base.

[0029] In this embodiment, as Figure 2 As shown, the mounting base includes a connecting plate 3, two support plates 4, and a mounting groove 5. The connecting plate 3 is horizontally fixed on the vibration platform 2. Each support plate 4 is vertically installed on the left and right ends of the connecting plate 3, and the distance between the two support plates 4 is adapted to the size of the reaction tank 1. Each support plate 4 has a mounting groove 5 on its top, the mounting groove 5 opening upwards and corresponding to the mounting rods 6 on both sides of the reaction tank 1. The mounting rods 6 are installed into the corresponding mounting grooves 5, and the depth of the mounting groove 5 is greater than the diameter of the mounting rod 6 to prevent the mounting rods 6 from falling off during vibration.

[0030] In this embodiment, a reinforcing plate 7 is also included. The reinforcing plate 7 is inclinedly disposed on the outer side of the support plate 4, and its bottom is fixedly connected to the connecting plate 3. The function of the reinforcing plate 7 is to strengthen the support plate 4. Multiple reinforcing plates can be provided to make the support plate 4 more stable.

[0031] The specific working process of this embodiment is as follows:

[0032] The reaction vessel 1 is transported to the vibration platform 2 using a transport vehicle. During installation, the mounting rods 6 on both sides of the reaction vessel 1 are placed into the corresponding mounting slots 5. Subsequently, the steel slag in the reaction vessel 1 undergoes a reduction reaction. After the reduction reaction is completed, vibration is activated to allow the deposition and aggregation of fine metallic iron. By enriching the fine iron powder, the fine metallic iron powder obtained from the reduction continuously sinks and aggregates into metal particles and even metal blocks. The larger the particles, the lower the degree of re-oxidation, thus ensuring the reduction effect and solving the problem of steel slag being re-oxidized in subsequent processing, which reduces the metal recovery rate.

[0033] Example 2

[0034] An apparatus for reducing and recovering metals from steel slag, such as Figure 3As shown, the structure of the apparatus for reducing and recovering metals from steel slag is basically the same as that of Embodiment 1. The only difference is that in this embodiment, a tank cover 8 is also included, which is located on the top of the reaction tank 1.

[0035] In this embodiment, the tank lid 8 is equipped with a stirrer for stirring liquid steel slag, and mechanical stirring is used instead of the traditional gas stirring method.

[0036] In this embodiment, as Figure 4 , 5 As shown, the stirrer includes a motor 9, a stirring shaft 10, and a stirring paddle 11. The motor 9 is located at the top of the tank cover 8, with its output end facing downwards. The stirring shaft 10 is located at the bottom of the tank cover 8, with its upper end connected to the output end of the motor 9 and its lower end extending downwards into the lower middle part of the reaction tank 1. The stirring paddle 11 is located below the stirring shaft 10. The stirring paddle 11 is a single-layer paddle. A double-layer paddle can also be used to improve stirring efficiency.

[0037] In this embodiment, a capping assembly (not shown in the figure) is also included. The capping assembly is connected to the top of the can lid 8 and is used to remove or cover the can lid 8.

[0038] More specifically, the cover assembly is a winch. Depending on the application scenario, other lifting equipment can be selected for the cover assembly, such as a lifting frame.

[0039] The specific working steps of this embodiment are basically the same as those of the device for reducing and recovering metal from steel slag in Embodiment 1. The only difference is that in this embodiment, after the reaction tank 1 is installed, the tank cover 8 is placed on the reaction tank 1, the stirrer is started, the motor 9 starts running, driving the stirring shaft 10 and the stirring paddle 11 to rotate, stirring the steel slag and reducing agent in the reaction tank 1, thereby carrying out the reduction reaction. After the reduction reaction is completed, the vibration is turned on. By using mechanical stirring instead of the traditional gas stirring method, the rate of temperature loss of the molten steel slag can be reduced, maintaining good fluidity of the molten steel slag, thereby ensuring the reduction effect and improving the recovery rate of metallic iron.

[0040] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of this utility model. It should not be construed that the specific implementation of this utility model is limited to these descriptions. This utility model can be applied to the deposition and enrichment of metals in all high-temperature liquid slags. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of this utility model, and all such substitutions or modifications should be considered within the protection scope of this utility model.

Claims

1. An apparatus for reducing and recovering metals from steel slag, characterized in that: The device includes a reaction vessel (1) and a vibration generating device. The reaction vessel (1) contains liquid steel slag to be reduced. The reaction vessel (1) is mounted on the vibration generating device, and the vibration generating device drives the reaction vessel (1) to vibrate.

2. The apparatus for reducing and recovering metals from steel slag as described in claim 1, characterized in that: The reaction vessel (1) is detachably connected to the vibration generating device.

3. The apparatus for reducing and recovering metals from steel slag as described in claim 1 or 2, characterized in that: The vibration generating device includes a vibration platform (2) and a mounting base, wherein the mounting base is disposed on the vibration platform (2); the reaction vessel (1) is mounted on the mounting base.

4. The apparatus for reducing and recovering metals from steel slag as described in claim 3, characterized in that: The mounting base includes a connecting plate (3), two support plates (4), and a mounting groove (5); the connecting plate (3) is horizontally mounted on the vibration platform (2); each support plate (4) is vertically mounted on the connecting plate (3); the top of each support plate (4) is provided with the mounting groove (5), which corresponds to the mounting rods (6) on both sides of the reaction tank (1), and the mounting rods (6) are installed into the corresponding mounting grooves (5).

5. The apparatus for reducing and recovering metals from steel slag as described in claim 4, characterized in that: It also includes a reinforcing plate (7), which is inclinedly disposed on the outside of the support plate (4), and its bottom is fixedly connected to the connecting plate (3).

6. The apparatus for reducing and recovering metals from steel slag as described in claim 1, characterized in that: It also includes a lid (8), which is located on top of the reaction vessel (1).

7. The apparatus for reducing and recovering metals from steel slag as described in claim 6, characterized in that: The can lid (8) is equipped with a stirrer for stirring liquid steel slag.

8. The apparatus for reducing and recovering metals from steel slag as described in claim 7, characterized in that: The stirrer includes a motor (9), a stirring shaft (10), and a stirring paddle (11). The motor (9) is located at the top of the tank cover (8) with its output end facing downwards. The stirring shaft (10) is located at the bottom of the tank cover (8), with its upper end connected to the output end of the motor (9) and its lower end extending downwards into the middle and lower part of the reaction vessel (1). The stirring paddle (11) is located at the lower part of the stirring shaft (10).

9. The apparatus for reducing and recovering metals from steel slag as described in claim 7, characterized in that: The stirring paddle (11) is a single-layer paddle or a double-layer paddle.

10. The apparatus for reducing and recovering metals from steel slag as described in any one of claims 6 to 9, characterized in that: It also includes a capping assembly, which is connected to the top of the can lid (8) for removing or covering the can lid (8).

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