A flotation agent gaseous addition system

Abstract

The present invention discloses a flotation agent gaseous addition system, belonging to the flotation technology fields of coal flotation and mineral flotation. Heated gas is passed through a flotation agent tank. As the hot gas passes through the tank, it carries the gaseous agent with it. The gaseous agent, carrying the agent, emerges from the end of the air inlet pipe at the bottom of the tank and rises to the liquid surface, carrying the flotation agent with it during the ascent. After leaving the flotation agent liquid surface, the gaseous form carrying the flotation agent is added through the air outlet pipe to the air inlet of the bubble generator of the flotation equipment. In the bubble generator of the flotation equipment, a large number of fine bubbles containing the liquid agent are generated. The gaseous agent adheres to the bubble surface, increasing the bubble activity and acting on the target mineral particles in the ore slurry, causing the mineral particles to selectively adhere to the bubbles and float upward. A supplementary air source is used to adjust the amount of supplementary air intake. The system has the advantages of low agent consumption and good flotation effect.

Description

Technical Field

[0001] The present invention relates to the field of flotation technology such as coal flotation and mineral flotation, and in particular to a flotation agent gaseous addition system. Background Art

[0002] Coal mining and washing processes generate a significant amount of coal slime. This slime can be recovered and reused through flotation, due to the highly hydrophobic surface of clean coal particles. Flotation, a separation method that utilizes differences in the physical and chemical properties of mineral surfaces, is widely used to separate and improve fine-grained nonferrous and ferrous metals, as well as coal. Flotation is one of the most important methods for enriching useful minerals in modern times, and the application and development of flotation reagents are directly related to the effectiveness of flotation processes.

[0003] Existing flotation agent addition systems include simple diversion channels or spraying equipment that directly introduce the flotation agent into the coal slurry, either by spraying or jetting it into the coal slurry, or by atomizing it and adding it to a slurry mixing device. This improves the surface hydrophobicity of the concentrate particles, making it easier for the bubbles produced by the bubble generator to adhere to the concentrate particles, thereby floating the concentrate particles. Bubbles, as flotation carriers, play a vital role in the flotation process. By directly vaporizing the flotation agent, rather than changing the surface hydrophobicity of the concentrate particles, the flotation agent is directly vaporized to produce bubbles containing the gaseous agent. This allows the flotation agent to be carried on the surface of the bubbles, making it easier for the bubbles to adhere to the concentrate particles, enhancing the interaction between the bubbles and the particles. This is more targeted, more conducive to improving the flotation effect, and saving the amount of flotation agent used. Summary of the Invention

[0004] Purpose of the invention: To address the shortcomings of the existing technology, a flotation reagent gas addition system is provided. By heating gas, a gaseous reagent is carried out in the reagent tank, and bubbles are generated in the bubble generating device of the flotation equipment, thereby increasing the activity of the bubbles, acting on the target mineral particles in the slurry, reducing bubble mergers and improving the stability of the foam, thereby improving the dispersibility and activity of the flotation reagent and reducing the amount of reagent used.

[0005] Technical Solution: To achieve the above-mentioned objectives, the present invention provides a flotation reagent gaseous addition system, comprising a reagent tank containing a flotation reagent, the reagent tank being sealed as a whole, an air inlet pipe and an air outlet pipe being provided at the top of the reagent tank, wherein one end of the air inlet pipe is submerged below the liquid level of the flotation reagent and close to the bottom of the reagent tank, the other end of the air inlet pipe is sequentially connected to a heater and an air source, one end of the air outlet pipe is arranged above the liquid level of the flotation reagent, the other end of the air outlet pipe is connected to the inlet of a bubble generating device, and the outlet of the bubble generating device is connected to a flotation device;

[0006] The gas output from the air source is heated as needed by a heater and then pressurized into the reagent tank through an air inlet pipe. The heated gas enters the flotation reagent from the end of the air inlet pipe near the bottom of the reagent tank and rises to the surface of the liquid. During the rise, the heated gas fully carries the flotation reagent. When the heated gas leaves the flotation reagent liquid surface, it is rich in flotation reagent components. The heated gas rich in flotation reagent components is output from the air outlet pipe of the reagent tank and enters the bubble generating device of the flotation equipment, where a large number of bubbles containing flotation reagent are generated. The gaseous flotation reagent adheres to the surface of the bubbles and enters the flotation slurry to participate in flotation, effectively increasing the activity of the bubbles. The bubbles act on the target mineral particles in the slurry, causing the mineral particles to selectively adhere to the bubbles and float to the surface, thereby improving flotation efficiency, reducing bubble mergers, and improving bubble stability. This increases the activity and dispersion of the reagent, improves the interaction between the reagent and the mineral particles, and increases the utilization efficiency of the flotation reagent.

[0007] Furthermore, a flow meter is provided between the gas source and the heater, and the flotation reagent gas added to the flotation device per unit time is obtained through the display data of the flow meter, thereby determining the dosage of the flotation reagent.

[0008] Furthermore, the gas volume of the gas source is adjusted as needed. If the gas volume is insufficient, it will affect the full mixing of the slurry and gas or the direct sedimentation of the ore particles, thereby affecting the mixing of the reagent and the slurry, resulting in fewer effective mineralized bubbles in the equipment; at the outlet of the bubble generating device, a supplementary gas source is connected through a three-way connection to supplement the gas volume entering the bubble generating device, so that the total gas volume entering the bubble generating device meets the flotation requirements.

[0009] Furthermore, the temperature of the inlet air of the heater is adjustable within a range of 30-90° C., and the specific temperature can be adjusted according to the properties of the materials and the amount of reagent added.

[0010] Furthermore, the gas provided by the gas source includes air, N2 or CO2; the use of CO2 can obtain a higher combustible material recovery rate and a lower ash content, significantly improve the activity and dispersibility of the gaseous agent, ensure safety, and save the amount of agent.

[0011] Furthermore, by adjusting the type and liquid level of the reagent in the reagent tank, the amount of reagent carried by the unit gas is controlled and adjusted, wherein the flotation reagent includes kerosene, light diesel oil, and fatty acid; the fine oil-containing bubbles generated in the reagent tank are transported to the flotation equipment.

[0012] Beneficial Effects: This invention proposes a method for generating bubbles containing a gaseous flotation agent by using heated gas to carry a gaseous agent. This flotation agent gaseous addition system is simple to operate. The heated gas carries the flotation agent through the flotation agent. Once in the flotation equipment, the gaseous agent adheres to the surface of the bubbles, increasing bubble activity and interacting with target mineral particles in the slurry, causing them to selectively adhere to the bubbles and float upward. This method is suitable for a wide range of liquid agents (such as kerosene, light diesel, and fatty acids). Compared to direct addition of liquid agents, this gaseous agent addition method is convenient, reduces bubble mergers, improves bubble stability, enhances agent activity and dispersion, and improves the interaction between the agent and mineral particles. This method can improve flotation agent utilization efficiency and reduce agent dosage by 30%. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the flotation agent gaseous addition system of the present invention. DETAILED DESCRIPTION

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] like Figure 1 As shown, a flotation agent gaseous addition system of the present invention comprises a gas source 1, a flow meter 2, a heater 3, and a reagent tank 4; the gas source 1 provides a certain flow of gas, and data is displayed when the gas passes through the flow meter 2, thereby obtaining the flotation agent added to the flotation device per unit time and clarifying the dosage of the added agent.

[0016] The gas enters the reagent tank 4 through the heater 3. The heated gas emerges from the end of the air inlet pipe at the bottom of the reagent tank 4 and floats to the liquid surface, carrying the flotation reagent with it during the floating process. After leaving the flotation reagent liquid surface, it forms a gaseous form carrying the flotation reagent and passes through the end of the air outlet pipe of the reagent tank 4 to be added to the air inlet of the bubble generating device of the flotation equipment. The supplementary air source is added to the flotation equipment through the three-way valve, avoiding the phenomenon of insufficient effective mineralization bubbles or direct sedimentation of mineral particles due to insufficient air volume in the flotation equipment. A large number of bubbles containing flotation reagents are generated in the bubble generating device of the flotation equipment. The gaseous flotation reagents adhere to the surface of the bubbles and enter the flotation pulp to participate in flotation, effectively improving the activity of the bubbles. The bubbles act on the target mineral particles in the pulp, causing the mineral particles to selectively adhere to the bubbles and float up, reducing bubble mergers and improving bubble stability. Applicable liquid reagents include kerosene, light diesel, fatty acids, etc. Compared with directly adding liquid reagents, the gaseous reagent addition method is easy to operate, improves flotation efficiency, reduces bubble mergers and improves bubble stability, and improves reagent activity and dispersion effect.

[0017] The gas provided by the gas source 1 includes air, N2 or CO2, among which CO2 can obtain a higher combustible recovery rate and a lower ash content, significantly improve the activity and dispersibility of the gaseous agent, ensure safety, and save the amount of agent.

[0018] The inlet temperature of the heater 3 is adjustable within a range of 30-90°C, and can be adjusted according to the properties of the materials and the amount of reagent added. The type and liquid level of the reagent in the reagent tank 4 can be adjusted to control the amount of reagent carried per unit gas, which is beneficial to improving the flotation effect and saving the amount of flotation reagent.

[0019] The above descriptions are only individual embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A flotation reagent gas addition system, characterized by: The invention comprises a reagent tank (4) containing a flotation reagent, the reagent tank (4) being sealed as a whole, an air inlet pipe and an air outlet pipe being provided at the top of the reagent tank (4) and extending into the tank, wherein one end of the air inlet pipe is immersed below the liquid surface of the flotation reagent and close to the bottom of the reagent tank (4), the other end of the air inlet pipe is sequentially connected to a heater (3) and an air source (1), one end of the air outlet pipe is arranged above the liquid surface of the flotation reagent, the other end of the air outlet pipe is connected to the inlet of a bubble generating device, and the outlet of the bubble generating device is connected to a flotation device; wherein the gas outputted by the air source (1) is heated by the heater (3) as required and then pressurized to enter the reagent tank (4) from the air inlet pipe, the heated gas enters the flotation reagent from the end of the air inlet pipe close to the bottom of the reagent tank (4) and floats to the liquid surface, the heated gas fully carries the flotation reagent during the floating process, and when the heated gas leaves the liquid surface of the flotation reagent, it is rich in a large amount of flotation reagent components, The heated gas rich in a large amount of flotation reagent components is output from the gas outlet pipe of the reagent tank (4) and enters the bubble generating device of the flotation equipment, and a large number of bubbles containing flotation reagents are generated in the bubble generating device of the flotation equipment. The gaseous flotation reagent adheres to the surface of the bubbles and enters the flotation pulp to participate in flotation, effectively improving the activity of the bubbles, acting on the target mineral particles in the pulp so that the mineral particles selectively adhere to the bubbles and float up, thereby improving the flotation efficiency, reducing the merger of bubbles and improving the stability of bubbles, improving the activity and dispersion effect of the reagent, improving the effect of the reagent and mineral particles, and improving the utilization efficiency of the flotation reagent; the gas provided by the gas source (1) includes air, N2 or CO2; using CO2 can obtain a higher combustible recovery rate and a lower ash content, significantly improve the activity and dispersion of the gaseous reagent, ensure safety, and save the amount of reagent.

2. The flotation reagent gas addition system according to claim 1, characterized in that: A flow meter (2) is provided between the gas source (1) and the heater (3). The flotation reagent gas added to the flotation device per unit time is obtained through the display data of the flow meter (2), thereby determining the dosage of the flotation reagent added.

3. The flotation reagent gas addition system according to claim 1, characterized in that: The gas volume of the gas source (1) is adjusted as needed. If the gas volume is insufficient, it will affect the full mixing of the slurry and the gas or the direct sedimentation of the ore particles, thereby affecting the mixing of the reagent and the slurry, resulting in less effective mineralization bubbles in the equipment; the gas volume entering the bubble generating device is supplemented by connecting the gas source through a three-way connection at the outlet of the bubble generating device, so that the total gas volume entering the bubble generating device meets the flotation requirements.

4. The flotation reagent gas addition system according to claim 1, characterized in that: The temperature of the inlet air of the heater (3) is adjustable within a range of 30-90°C. The specific temperature can be adjusted according to the properties of the materials and the amount of the added agent.

5. The flotation reagent gas addition system according to claim 1, characterized in that: By adjusting the type and liquid level of the reagent in the reagent tank (4), the amount of reagent carried by the unit gas is controlled and adjusted, wherein the flotation reagent includes kerosene, light diesel oil, and fatty acid; the fine bubbles containing oil generated in the reagent tank (4) are transported to the flotation equipment.

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