Negative pressure self-suction type energy-saving leaching tank

Abstract

The utility model relates to a negative pressure self-suction type energy-saving leaching tank which comprises a tank body, the side wall of the tank body is communicated with a slurry inlet pipe and a slurry outlet pipe, at least two groups of air inflation stirring devices are arranged in the tank body, each air inflation stirring device comprises an air inflation pipe, the bottom end of each air inflation pipe extends into the tank body and is communicated with the side wall of a negative pressure box, and the bottom end of each air inflation pipe is communicated with the side wall of the negative pressure box. An opening is formed in the bottom of the negative pressure box, a distance is formed between the opening and the bottom of the tank body, the top of the negative pressure box is communicated with a circulating ore pulp pipe, and the other end of the circulating ore pulp pipe extends out of the tank body and then returns into the tank body. A traditional independent inflation system and a traditional independent stirring system are subjected to integrated transformation, the arrangement of the stirring system is omitted, the negative pressure area and the circulating ore pulp pipe are ingeniously arranged in the tank, the physical characteristic that pressure difference can be generated through high-pressure inflation is utilized, oxygen dissolving and rolling stirring of ore pulp are achieved, oxygen dissolving is sufficient, the leaching rate of gold and silver can be improved, and the leaching efficiency of gold and silver is improved. The cost-reducing and synergistic effects are obvious.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrometallurgy, in particular to a negative pressure self-priming energy-saving leaching tank. Background Art

[0002] The leaching of metals in the leaching tank mainly depends on the leaching reaction between metals and cyanide and oxygen. To ensure the leaching effect, it must be fully mixed and evenly oxygenated, which is inseparable from the stirring system and the aeration system. Figure 1 As shown, the stirring system 7 and the aeration system 8 are two independently configured systems. Each system requires a separate power source to operate independently. The stirring system is driven by an electric motor. Taking a 75kW motor as an example, it consumes 65,700 kW·h of electricity annually. Furthermore, accessories such as the stirring blades and stirring shaft frequently break down, and once damaged, downtime and maintenance are time-consuming and labor-intensive, impacting production. The oxygen required for leaching must be supplied separately through the aeration system. Typically, two to three aeration points are fixed around the tank body, or an aeration pipe is connected to the bottom of the stirring blade. However, in actual use, uneven aeration occurs, resulting in insufficient dissolved oxygen in some areas, which affects the leaching of gold and silver.

[0003] In response to the problems of high energy consumption, high failure rate and low precious metal recovery rate caused by insufficient dissolved oxygen in traditional leaching tanks, this application specifically proposes a leaching tank that transforms the inflation system into a dual function of inflation and stirring, thereby eliminating the motor-driven impeller stirring system, achieving the purpose of reducing costs and increasing efficiency, optimizing the oxygenation and stirring effects, and thus improving the gold and silver leaching rate. Utility Model Content

[0004] The utility model provides a negative pressure self-priming energy-saving leaching tank.

[0005] The specific technical solution of the utility model is:

[0006] A negative pressure self-priming energy-saving leaching tank comprises a tank body, the side walls of the tank body are connected to a slurry inlet pipe and a slurry outlet pipe, at least two sets of aeration and stirring devices are provided in the tank body, the aeration and stirring device comprises an aeration pipe, the bottom end of the aeration pipe extends to the side wall of the tank body and is connected to a negative pressure box, the bottom of the negative pressure box is provided with an opening, and the opening is spaced apart from the bottom of the tank body, the top of the negative pressure box is connected to a circulating slurry pipe, the other end of the circulating slurry pipe extends outside the tank body and then returns to the tank body.

[0007] Furthermore, preferably, four sets of aeration and stirring devices are provided in the tank body.

[0008] Furthermore, preferably, when a plurality of the trough bodies are connected in series, the slurry outlet pipe of the upper trough body is connected to the slurry inlet pipe of the lower trough body, and the setting height of the upper trough body is higher than the setting height of the lower trough body.

[0009] The beneficial effects of the utility model are as follows: the utility model integrates and transforms the traditional independent inflation system and stirring system, eliminating the need for the stirring system, and cleverly arranges a negative pressure zone and a circulating slurry pipe in the tank, utilizing the physical property that high-pressure inflation can generate a pressure difference, thereby achieving dissolved oxygen and tumbling stirring of the slurry, and sufficient dissolved oxygen is beneficial to improving the gold and silver leaching rate, and significantly reducing costs and increasing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a structural diagram of a traditional stirred aerated leaching tank;

[0011] Figure 2 This is a structural diagram of a negative pressure self-priming energy-saving leaching tank according to this embodiment;

[0012] Figure 3 This is a top view of a negative pressure self-priming energy-saving leaching tank according to this embodiment;

[0013] Figure 4 This is a structural diagram of multiple negative pressure self-priming energy-saving leaching tanks connected in series in this embodiment;

[0014] In the figure: 1- slurry inlet, 2- tank body, 3- inflation pipe, 4- circulating slurry pipe, 5- slurry outlet pipe, 6- negative pressure box. DETAILED DESCRIPTION

[0015] In order to make the technical problems and technical solutions solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0016] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0017] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0018] like Figure 2 As shown, the present embodiment provides a negative pressure self-priming energy-saving leaching tank, comprising a tank body 2, with a slurry inlet pipe 1 and a slurry outlet pipe 5 connected to the side wall of the tank body 2. The slurry inlet pipe 1 is arranged near the bottom of the tank body 2, and the slurry outlet pipe 5 is arranged near the top of the tank body 2. At least two sets of aeration and stirring devices are provided in the tank body 2. In order to ensure the aeration and stirring effect, the aeration and stirring devices can be flexibly arranged in an appropriate number according to the size of the tank body or the requirements of the leaching process.

[0019] The above-mentioned aeration and stirring device includes an aeration pipe 3, the bottom end of which extends into the tank body 2 and is connected to the side wall of the negative pressure box 6. An opening is provided at the bottom of the negative pressure box 6, and the opening is spaced apart from the bottom of the tank body 2. The opening is used to allow the slurry to enter the negative pressure box 6. The top of the negative pressure box 6 is connected to a circulating slurry pipe 4. The other end of the circulating slurry pipe 4 extends outside the tank body 2 and then returns to the tank body 2, forming a circulating bend pipe.

[0020] Working principle: High-pressure gas is flushed into the negative pressure box 6 along the inflation pipe 3 through the air compressor. Due to the restriction of the negative pressure box 6, the high-pressure gas will not be directly dispersed and mixed in the slurry at the bottom of the tank body 2, but will flow upward along the circulating slurry pipe 4. This process will generate a pressure difference, forming a negative pressure area in the negative pressure box 6. The slurry in the tank body 2 will be sucked into the negative pressure area from the opening at the bottom of the negative pressure box 6, and will flow upward along the circulating slurry pipe 4 along with the high-pressure gas. During the flow process, the slurry and the high-pressure gas are fully mixed to form dissolved oxygen. The slurry continues to flow to the top of the leaching tank and then returns to the tank body 2. Then, under the traction force of the negative pressure zone, the slurry flows downward again. This cycle achieves the effect of repeated oxygenation and tumbling stirring. Under the joint action of multiple sets of inflation and stirring devices, the slurry in the tank can be fully stirred and oxygenated, thereby improving the gold and silver leaching rate.

[0021] like Figure 3 As shown, the negative pressure self-priming leaching tank provided in this embodiment is provided with four sets of aeration and stirring devices in the tank body 2. The four sets of aeration and stirring devices can be as follows: Figure 3 The left and right sides are symmetrically arranged in pairs, and a circular array arrangement can also be adopted to improve the oxygenation and stirring effect.

[0022] like Figure 4 As shown, when multiple troughs 2 are connected in series, the slurry outlet pipe 5 of the upper trough is connected to the slurry inlet pipe 1 of the lower trough, and the setting height of the upper trough is higher than the setting height of the lower trough, forming a height difference setting. When multiple leaching tanks are operated in series, the newly-input slurry and the slurry in the current trough are circulated, oxygenated and turned over in the current trough under the traction force of the negative pressure zone, thereby completing the aerobic leaching operation. The slurry overflowing from the current trough flows from the slurry outlet pipe 5 at the upper part of the trough to the slurry inlet pipe 1 at the lower part of the next trough. This flow mode solves the problem of poor slurry flow between the series-connected troughs.

[0023] The present invention is described in detail above through specific and preferred embodiments, but those skilled in the art should understand that the present invention is not limited to the embodiments described above. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A negative pressure self-priming energy-saving leaching tank, comprising a tank body (2), wherein a slurry inlet pipe (1) and a slurry outlet pipe (5) are connected on the side wall of the tank body (2), characterized in that: At least two groups of aeration and stirring devices are provided in the tank body (2), and the aeration and stirring devices include an aeration pipe (3), the bottom end of the aeration pipe (3) extends into the tank body (2) and is connected to the side wall of the negative pressure box (6), the bottom of the negative pressure box (6) is provided with an opening, and the opening is spaced apart from the bottom of the tank body (2), the top of the negative pressure box (6) is connected to a circulating slurry pipe (4), and the other end of the circulating slurry pipe (4) extends outside the tank body (2) and then returns to the tank body (2).

2. The negative pressure self-priming energy-saving leaching tank according to claim 1, characterized in that: Four sets of aeration and stirring devices are provided in the tank body (2).

3. The negative pressure self-priming energy-saving leaching tank according to claim 1, characterized in that: When a plurality of the trough bodies (2) are connected in series, the pulp outlet pipe (5) of the upper trough body is connected to the pulp inlet pipe (1) of the lower trough body, and the setting height of the upper trough body is higher than the setting height of the lower trough body.

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