A circulating water recovery device and system for a small-scale flotation column

Abstract

The utility model relates to a kind of circulating water recovery device for small flotation column, concentrate tank is set up in the upper portion of flotation column, concentrate tank is communicated with concentrate box by concentrate pipe, the outside of concentrate box is provided with backwater tank, concentrate box is communicated with backwater tank by overflow port, the bottom of backwater tank is connected with water distribution ring pipe by backwater pipe, two branch pipes are symmetrically communicated on water distribution ring pipe, branch pipe end connects flotation column, to solve three big core problems that existing circulating water device exists in small flotation column application water quality control difficult, mineral loss rate is high, energy consumption is big. Especially for the small equipment of processing capacity≤5t / h, traditional system is due to high structural redundancy, water flow control precision is insufficient, leading to separation efficiency is 15%-20% lower than industrial large-scale flotation column, concentrate overflow water of the application replaces traditional water source, reduces impurity mixing, concentrate pipe end built-in design prevents splashing, closed cycle reduces loss point, detachable concentrate box simplifies cleaning process, maintenance time is shortened by 50%.

Description

Technical Field

[0001] This utility model relates to the field of mineral flotation technology, and in particular to a circulating water recovery device and system for small flotation columns. Background Technology

[0002] Flotation columns, as highly efficient mineral separation equipment, are widely used in the flotation separation of metallic ores (such as copper, lead-zinc ores) and non-metallic ores (apatite, fluorite). Their working principle involves the adsorption of target mineral particles by air bubbles, causing them to float to the concentrate cell, thus separating the minerals from the gangue. In this process, the quality and circulation efficiency of the wash water directly affect the separation effect, mainly in the following ways: Water pollution issues: Production rinsing water often contains suspended solids (SS≥500mg / L) and residual chemicals (such as xanthate and pine oil). Direct reuse can lead to: Concentrate foam stability decreased, and bubble coalescence intensified. The concentrate grade decreased (the measured Cu grade of a copper mine concentrate decreased from 24.1% to 18.7%). The tailings metal loss rate increased (>0.8%). Structural design flaws: The circulating water tank and the concentrate collection system are not separated, and mineral particles re-enter the flotation column during the reflux process (mineral circulation rate > 15%). Single-point water distribution in the return water pipeline causes uneven flow field inside the flotation column (flow velocity deviation > 30%). Energy consumption and cost issues: To maintain water quality, frequent replenishment of fresh water is required (water consumption of 3.2-4.5 m³ per ton of mine). 3 ) Wastewater treatment costs increase (accounting for 12%-18% of total mineral processing costs). Industry Improvement Attempts and Limitations Physical filtration method: This method uses multiple layers of filters to purify circulating water, but it has the following drawbacks: Clogged filters cause water pressure fluctuations (pressure variation ±0.5MPa). The retention efficiency of fine-grained minerals (-0.045mm) is low (<40%). Chemical treatment: Adding flocculants to purify water quality, but this causes new problems: Residual reagents can alter the pH of the pulp (fluctuating between 1.5 and 2.0). Flotation selectivity decreased (separation efficiency between galena and sphalerite decreased by 23%). In summary, existing circulating water systems face three major challenges in small-scale flotation column applications: difficulty in water quality control, high mineral loss rate, and high energy consumption. Especially for small-scale equipment with a processing capacity of ≤5t / h, traditional systems suffer from high structural redundancy and insufficient water flow control precision, resulting in a separation efficiency 15%-20% lower than that of large industrial flotation columns.

[0003] Therefore, the industry urgently needs a closed-loop circulation system specifically designed for small flotation columns to achieve efficient mineral recovery while ensuring water quality and reducing operating energy consumption. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a circulating water recovery device for small flotation columns. The concentrate overflow water replaces the traditional water source, reducing the mixing of impurities. The built-in design at the end of the concentrate pipe prevents splashing. The closed circulation reduces the loss points. The detachable concentrate box simplifies the cleaning process and reduces maintenance time by 50%.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a circulating water recovery device for a small flotation column, comprising a concentrate pipe, a return water pipe, a concentrate box, a return water box, a water distribution ring pipe, and a concentrate trough. The concentrate trough is located at the top of the flotation column and is connected to the concentrate box via the concentrate pipe. A return water box is provided outside the concentrate box, and the concentrate box and the return water box are connected via an overflow port. The bottom of the return water box is connected to the water distribution ring pipe via the return water pipe. Two branch pipes are symmetrically connected to the water distribution ring pipe, and the ends of the branch pipes are connected to the flotation column.

[0006] Furthermore, the inclination angle of the concentrate trough is 25°-30°, and the inclined end of the concentrate trough is directly connected to the concentrate pipe.

[0007] Furthermore, the distance between the end of the concentrate pipe and the bottom of the concentrate box is 150-250mm.

[0008] Furthermore, the concentrate box is a detachable independent container with a volume 0.3-0.5 times that of the return water tank.

[0009] Furthermore, the two branch pipes of the water distribution ring pipe are symmetrically distributed at 180°, and the ratio of the diameter of the branch pipe to the diameter of the water distribution ring pipe is 1:1.2-1.5.

[0010] Furthermore, the return water pipe is equipped with a variable frequency centrifugal pump, and the inlet and outlet pipe diameters of the pump body are consistent with those of the return water pipe.

[0011] A system for a circulating water recovery device for a small flotation column, wherein a tailings pipe is provided at the bottom of the flotation column, and the circulating water recovery device, together with the tailings pipe at the bottom of the flotation column, forms a closed water circuit.

[0012] Compared with the prior art, the beneficial effects that this utility model can achieve are: This application replaces traditional water sources with concentrate overflow water, reducing the mixing of impurities. The built-in design at the end of the concentrate pipe prevents splashing, the closed circulation reduces loss points, and the detachable concentrate box simplifies the cleaning process, reducing maintenance time by 50%. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a supplementary three-dimensional structural diagram of the present invention.

[0014] The components are: 1. Concentrate pipe; 2. Return water pipe; 3. Concentrate tank; 4. Return water tank; 5. Water distribution ring pipe; 6. Tailings pipe; 7. Concentrate trough. Detailed Implementation

[0015] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this utility model. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0016] Example 1:

[0017] This device achieves solid-liquid separation by constructing a three-stage closed-loop system of concentrate sedimentation, overflow recovery, and uniform water return, utilizing the gravity settling of the minerals themselves.

[0018] Combination Figures 1-3 As shown, this utility model provides a circulating water recovery device for a small flotation column, including a concentrate pipe 1, a return water pipe 2, a concentrate tank 3, a return water tank 4, a water distribution ring pipe 5, and a concentrate trough 7. The concentrate trough 7 is located at the top of the flotation column. The concentrate trough 7 is preferably made of 304 stainless steel. The bottom of the concentrate trough 7 has a single-end inclined structure. The concentrate trough 7 is connected to the concentrate tank 3 through the concentrate pipe 1. The concentrate tank 3 is made of detachable PP material, and the volume of the concentrate tank 3 is 0.5 m³. 3 The concentrate pipe 1 is made of DN80 steel pipe, and its end extends into the concentrate tank 3. A return water tank 4 is installed outside the concentrate tank 3. The concentrate tank 3 and the return water tank 4 are connected through an overflow port. The volume of the return water tank 4 is larger than that of the concentrate tank 3. The return water tank 4 is a welded carbon steel tank with a volume of 1.25 m³. 3The bottom of the return water tank 3 is connected to the water distribution ring pipe 5 via the return water pipe 2. Two branch pipes are symmetrically connected to the water distribution ring pipe 5, and the ends of the branch pipes are connected to the flotation column.

[0019] The inclination angle of the concentrate tank 7 is 25°-30°, which can accelerate the collection of concentrate (increase the flow rate by 40%). The inclined end of the concentrate tank 7 is directly connected to the concentrate pipe 1.

[0020] The distance between the end of concentrate pipe 1 and the bottom of concentrate box 3 is 150-250mm. The end of concentrate pipe is built-in → forming a liquid seal to prevent splashing (mineral loss rate ↓38%).

[0021] The concentrate tank 3 is a detachable independent container with a volume 0.3-0.5 times that of the return water tank 4, providing a buffer space to prevent overflow and backflow.

[0022] The two branch pipes of the water distribution ring pipe 5 are symmetrically distributed at 180°. The ratio of the diameter of the branch pipe to the diameter of the water distribution ring pipe 5 is 1:1.2-1.5, so as to achieve balanced return water pressure (flow deviation <5%).

[0023] A variable frequency centrifugal pump is installed on the return water pipe 2, and the inlet and outlet pipe diameters of the pump body are the same as those of the return water pipe 2.

[0024] A small flotation column circulating water system is provided, wherein a tailings pipe 6 is provided at the bottom of the flotation column, and the circulating water recovery device, together with the tailings pipe 6 at the bottom of the flotation column, forms a closed water circuit.

[0025] When the sediment layer thickness in the concentrate box is ≥300mm: close the concentrate pipe valve, disassemble the concentrate box and clean the minerals (time ≤15min). Return water flow rate adjustment: When the concentrate particle size is >0.3mm, adjust to 0.8m / s (to prevent sedimentation). When the concentrate particle size is <0.1mm, adjust to 0.3m / s (to avoid foam breakage). It should be noted that during the installation process, the difference in liquid level between concentrate tank 3 and return water tank 4 should be ≥300mm (to ensure gravity overflow), and the branch pipe of water distribution ring pipe (5) should be installed horizontally (angle deviation <2°).

[0026] Example 2

[0027] The difference between this embodiment and embodiment 1 is only in the concentrate pipe 1 and the return water tank. In this embodiment, the concentrate pipe (1) is a tapered flared pipe (e.g., inlet Φ80 → outlet Φ120), and an inclined plate settling device (plate spacing 50mm) is added in the return water tank (4). With this structure, the concentrate moisture content is reduced from 32% to 25%, and the turbidity of the return water is reduced from 120NTU to 80NTU.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A circulating water recovery device for a small flotation column, characterized in that: The system includes a concentrate pipe (1), a return water pipe (2), a concentrate box (3), a return water box (4), a water distribution ring pipe (5), and a concentrate trough (7). The concentrate trough (7) is located at the top of the flotation column. The concentrate trough (7) is connected to the concentrate box (3) through the concentrate pipe (1). The return water box (4) is located outside the concentrate box (3). The concentrate box (3) and the return water box (4) are connected through an overflow port. The bottom of the return water box (4) is connected to the water distribution ring pipe (5) through the return water pipe (2). Two branch pipes are symmetrically connected on the water distribution ring pipe (5). The ends of the branch pipes are connected to the flotation column.

2. The circulating water recovery device for a small flotation column according to claim 1, characterized in that: The inclination angle of the concentrate tank (7) is 25°-30°, and the inclined end of the concentrate tank (7) is directly connected to the concentrate pipe (1).

3. The circulating water recovery device for a small flotation column according to claim 1, characterized in that: The distance between the end of the concentrate pipe (1) and the bottom of the concentrate box (3) is 150-250mm.

4. The circulating water recovery device for a small flotation column according to claim 1, characterized in that: The concentrate box (3) is a detachable independent container with a volume that is 0.3-0.5 times that of the return water box (4).

5. The circulating water recovery device for a small flotation column according to claim 1, characterized in that: The two branch pipes of the water distribution ring pipe (5) are symmetrically distributed at 180°, and the ratio of the diameter of the branch pipe to the diameter of the water distribution ring pipe (5) is 1:1.2-1.

5.

6. The circulating water recovery device for a small flotation column according to claim 1, characterized in that: The return water pipe (2) is equipped with a variable frequency centrifugal pump, and the inlet and outlet pipe diameters of the pump body are consistent with those of the return water pipe (2).

7. A small-scale flotation column circulating water system, characterized in that: The circulating water recovery device includes any one of claims 1-6, wherein a tailings pipe (6) is provided at the bottom of the flotation column, and the circulating water recovery device, together with the tailings pipe (6) at the bottom of the flotation column, forms a closed water circuit.

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