A method and device for ultrasonic-assisted dehydration of zinc smelting slag

Abstract

The application discloses a method for ultrasonic-assisted dehydration of zinc smelting waste residues, and belongs to the technical field of metal smelting. The method adopts ultrasonic action on the zinc smelting waste residues, so that water in the waste residues is more easily separated, then a filter press is used for filter pressing the zinc smelting waste residues, the zinc smelting waste residues after filter pressing are pressed into blocks, and finally the blocky zinc smelting waste residues are transported to a rotary kiln for further dehydration and drying. The water in the zinc smelting waste residues is more easily removed through ultrasonic action for a short time, energy is saved, and the blocky waste residues are also easy to transport.

Description

Technical Field

[0001] This invention patent belongs to the field of metal smelting technology, specifically relating to a method and apparatus for dewatering zinc smelting waste residue with ultrasonic assistance. Background Technology

[0002] Depending on the production process, zinc slag can be divided into two main categories: pyrometallurgical distillation slag and hydrometallurgical leaching slag. Hydrometallurgical zinc smelting produces waste slag with complex composition but high zinc content, making it highly valuable for recycling. However, zinc smelting waste slag often retains moisture on its surface and within its pores. This residual moisture needs to be air-dried or oven-dried before entering the dry process. Therefore, after completing the hydrometallurgical process, equipment is required to dry the zinc smelting waste slag. The rotary kiln volatilization method is commonly used for treating this type of slag. The rotary kiln volatilization method involves directly pressing and filtering the zinc smelting waste slag before placing it into a rotary kiln for drying.

[0003] However, this method has the following problems:

[0004] 1. It requires a very high filter press power or a powerful drying system to achieve this, which will consume a lot of energy and result in high recycling costs.

[0005] 2. Untreated waste residue is not easy to collect and is prone to falling and polluting the environment during transportation.

[0006] To address the aforementioned issues, this paper proposes a method and apparatus for ultrasonic-assisted dewatering of zinc smelting waste slag. Summary of the Invention

[0007] To address the aforementioned technical problems, this invention presents a method and apparatus for dewatering zinc smelting waste residue using ultrasonic waves. The method employs ultrasonic vibration to remove moisture from the surface and pores of the zinc smelting waste residue particles. The waste residue is then filtered using a filter press to remove the moisture removed by the ultrasonic vibration, simultaneously pressing the waste residue into blocks. Finally, the blocks are placed in a rotary kiln for drying. This method saves energy, and the block-shaped waste residue is easy to transport.

[0008] To achieve the above-mentioned technical effects, the present invention is implemented through the following technical solution: a method for dewatering zinc smelting waste residue with ultrasonic assistance, characterized in that: ultrasonic waves are used to oscillate the moisture on the surface and inside the pores of the zinc smelting waste residue particles, so that the moisture is removed from the surface; a filter press is used to filter the zinc smelting waste residue, so that the liquid is separated by the filter press to obtain blocky waste; the ultrasonic oscillation device is placed in the center of the storage tank so that the zinc smelting waste residue can be fully utilized, and the ultrasonic emission direction of the ultrasonic oscillation device is perpendicular to the direction of travel of the zinc smelting waste residue flowing into the pipeline.

[0009] Preferably, the distance between the ultrasonic oscillation device and the bottom of the zinc smelting waste storage tank is set to 2-50 mm.

[0010] Preferably, the operating pressure of the filter press is generally 0.3 to 0.6 MPa.

[0011] An ultrasonic-assisted dewatering device for zinc smelting waste residue is characterized in that: an inlet is provided on the upper surface of the storage tank, an outlet is provided at the lower part of the side surface of the storage tank, an ultrasonic oscillation device is installed inside the storage tank, the ultrasonic oscillation device is installed at the center of the storage tank, and the ultrasonic emission direction of the ultrasonic oscillation device is perpendicular to the travel direction of the zinc smelting waste residue flowing into the pipeline.

[0012] The beneficial effects of this invention are:

[0013] 1. Ultrasonic vibration is used to remove moisture from the surface and pores of zinc smelting waste slag particles, and then a filter press is used to filter the zinc smelting waste slag to remove the moisture that has been removed from the zinc smelting waste slag by ultrasonic vibration.

[0014] 2. At the same time, the zinc smelting waste slag is pressed into blocks, and finally the blocks of zinc smelting waste slag are put into a rotary kiln for drying; while saving energy, the waste slag pressed into blocks is easy to transport. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a process flow diagram of the present invention;

[0017] Figure 2 This is a structural diagram of the device of the present invention;

[0018] 1. Inlet; 2. Storage tank; 3. Outlet; 4. Ultrasonic oscillation device. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Example 1

[0021] like Figure 1 As shown, the method for dewatering zinc smelting waste residue with ultrasonic assistance according to the present invention is characterized by comprising the following steps:

[0022] The preceding process is a process of filtering out the supernatant from zinc smelting waste slag.

[0023] Ultrasonic vibration is used to remove moisture from the surface and pores of zinc smelting waste particles.

[0024] Using a filter press removes the moisture from the zinc smelting waste residue that has been expelled by ultrasonic waves and presses it into blocks, making it easier to dry the zinc smelting waste residue.

[0025] In the subsequent processing flow, after the above steps, most of the moisture in the zinc smelting waste slag has been removed. The filtered block waste slag only needs to be put into the rotary kiln, which can completely dry the zinc smelting waste slag in a relatively short time and with low energy consumption.

[0026] Example 2

[0027] like Figure 2 As shown, the device for dewatering zinc smelting waste residue with ultrasonic assistance according to the present invention is characterized by comprising the following steps:

[0028] When zinc smelting waste is fed into storage tank 2 from inlet 1, the ultrasonic oscillation device 4 is arranged in a straight line, and the ultrasonic emission direction is perpendicular to the walking direction of zinc smelting waste outlet 3. When the zinc smelting waste reaches a certain volume in storage tank 2, it is oscillated by ultrasonic waves, and the moisture on the surface and in the pores of the zinc smelting waste will be driven out by the ultrasonic oscillation.

[0029] The purpose of filter press is to squeeze away the water expelled by ultrasonic waves. Under the action of the filter press, zinc smelting waste is forced into the filter chamber by a feed pump, forming filter residue on the filter cloth until the filter chamber is full. The filtrate passes through the filter cloth and flows along the grooves of the filter plate to the corner channels of the plate frame for collection and discharge. The operating pressure is generally 0.3 to 0.6 MPa.

[0030] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A method for dewatering zinc smelting waste residue with ultrasonic assistance, characterized in that: Ultrasonic waves are used to vibrate the surface and pores of zinc smelting waste particles, causing the moisture to detach from the surface. A filter press is used to filter the zinc smelting waste, separating the liquid and obtaining blocky waste. The ultrasonic oscillator is placed in the center of the storage tank so that the zinc smelting waste can be fully utilized. The ultrasonic emission direction of the ultrasonic oscillator is perpendicular to the direction of flow of the zinc smelting waste into the pipeline. The distance between the ultrasonic oscillation device and the bottom of the zinc smelting waste storage tank is set to 2-50 mm; The operating pressure of the filter press is generally 0.3 to 0.6 MPa; The storage tank has an inlet on its upper surface and an outlet on the lower part of its side surface. An ultrasonic oscillation device is installed inside the storage tank, with the device positioned at the center of the tank. The ultrasonic emission direction of the device is perpendicular to the direction of flow of the zinc smelting waste into the pipeline.

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