CN-116140077-B - Bubble generator and hydraulic flotation equipment

Abstract

The invention discloses a bubble generator and hydraulic flotation equipment, belongs to the technical field of mineral processing, and solves the problem of poor separation effect caused by larger bubble size in the prior art. The bubble generator comprises an air supply unit, a flow dividing tee joint, an air chamber and a micro-pore plate, wherein the flow dividing tee joint is provided with an air inlet branch, an emptying branch and an air supply branch which are mutually communicated, an air outlet of the air supply unit is communicated with the air inlet branch, the emptying branch is communicated with the external environment, the air supply branch is communicated with the air chamber, and the micro-pore plate is arranged at an air outlet end of the air chamber. The bubble generator and the hydraulic flotation device can be used for hydraulic flotation.

Inventors

• LI CHAO
• CAO YIJUN

Assignees

• 郑州大学

Dates

Publication Date

20260505

Application Date

20220607

Claims (6)

1. 1. The hydraulic flotation equipment is characterized by comprising a bubble generator, a flotation column, a water supply unit and a water distribution unit; the water inlet of the water distribution unit is connected with the water supply unit, and the water outlet of the water distribution unit is positioned at the bottom of the flotation column; The bubble generator is arranged on a connecting pipeline between the water inlet of the water distribution unit and the water supply unit, and is positioned outside the flotation column, the bubble generator and the water distribution unit are two relatively independent components, the bubble size is independently regulated and controlled through the bubble generator, and the rising water flow speed is independently controlled through the water supply unit and the water distribution unit; The bubble generator comprises an air supply unit, a flow dividing tee joint, an air chamber and a micropore plate, wherein the flow dividing tee joint is provided with an air inlet branch, an emptying branch and an air supply branch which are mutually communicated; The air bubble generator further comprises a pulse electromagnetic valve, an air outlet of the air supply unit is communicated with the air inlet branch through the pulse electromagnetic valve, and no buffer tank is arranged on a connecting pipeline between the air supply unit and the split tee and between the split tee and the external environment; By adjusting the flow dividing ratio of the flow dividing tee joint, on the premise of not increasing the flow velocity of the air flow entering the air supply branch, the total air flow of the air supply unit is increased, part of air is emptied, the gas static pressure entering the micro-pore plate is increased, the bubbles are driven to be desorbed in advance, and the bubble forming scale is reduced.
2. 2. The hydraulic flotation device according to claim 1, wherein the flow ratio between the evacuation branch and the gas supply branch is 1-10.
3. 3. The hydraulic flotation device according to claim 1, wherein a pressure regulator is provided on the connection line of the air outlet of the air supply unit and the pulse solenoid valve.
4. 4. The hydraulic flotation device according to claim 1, wherein a gas flow meter is arranged on the connection line of the gas outlet of the gas supply unit and the pulse solenoid valve and/or on the connection line of the shunt tee and the external environment.
5. 5. The hydraulic flotation plant according to claim 1, further comprising a pressure sensor provided in the fluidized bed of the flotation column.
6. 6. The hydraulic flotation device of claim 1, further comprising a tailings discharge solenoid valve and a pressure sensing controller, wherein the pressure sensing controller is respectively connected with the pressure sensor and the tailings discharge solenoid valve, and the pressure sensing controller receives the pressure in the fluidized bed collected by the pressure sensor and judges whether the pressure in the fluidized bed exceeds a threshold value, and if the pressure exceeds the threshold value, the tailings discharge solenoid valve is controlled to be opened, and the flotation column is subjected to tailings discharge.

Description

Bubble generator and hydraulic flotation equipment Technical Field The invention belongs to the technical field of mineral processing, and particularly relates to a bubble generator and hydraulic flotation equipment. Background The hydraulic flotation is an emerging coarse grain separation technology, has good separation efficiency within the particle size range of 150-1000 mu m, and can be complementary with the traditional flotation method in separation granularity. The separation effect of the hydraulic flotation is mainly influenced by the rising water flow velocity and the bubble size. In the prior art, due to the influence of air supply pressure, the size of bubbles is larger, so that the sorting effect is poorer. Disclosure of Invention In view of the above analysis, the invention aims to provide a bubble generator and a hydraulic flotation device, which solve the problem of poor separation effect caused by larger bubble size in the prior art. The aim of the invention is mainly realized by the following technical scheme: The invention provides a bubble generator which comprises an air supply unit, a flow dividing tee joint, an air cavity and a micro-pore plate, wherein the flow dividing tee joint is provided with an air inlet branch, an air exhausting branch and an air supply branch which are mutually communicated, an air outlet of the air supply unit is communicated with the air inlet branch, the air exhausting branch is communicated with the external environment, the air supply branch is communicated with the air cavity, and the micro-pore plate is arranged at an air outlet end of the air cavity. Further, the flow ratio between the emptying branch and the air supply branch is 1-10. Further, the air inlet device also comprises a pulse electromagnetic valve, and an air outlet of the air supply unit is communicated with the air inlet branch through the pulse electromagnetic valve. Further, a pressure regulator is arranged on a connecting pipeline between the air outlet of the air supply unit and the pulse electromagnetic valve. Further, a gas flowmeter is arranged on a connecting pipeline of the gas outlet of the gas supply unit and the pulse electromagnetic valve and/or a connecting pipeline of the shunt tee joint and the external environment. Further, no buffer tank is arranged on the connecting pipeline between the air supply unit and the split tee joint and between the split tee joint and the external environment. The invention also provides hydraulic flotation equipment which comprises the bubble generator. The flotation device further comprises a flotation column, a water supply unit and a water distribution unit, wherein a water inlet of the water distribution unit is connected with the water supply unit, a water outlet of the water distribution unit is positioned at the bottom of the flotation column, a bubble generator is arranged on a connecting pipeline of the water inlet of the water distribution unit and the water supply unit, and the bubble generator is positioned outside the flotation column. Further, the flotation column also comprises a pressure sensor arranged in the fluidized bed layer of the flotation column. Further, the device also comprises a ore discharging electromagnetic valve and a pressure sensing controller, wherein the pressure sensing controller is respectively connected with the pressure sensor and the tailing discharging electromagnetic valve, the pressure sensing controller receives the pressure in the fluidized bed layer collected by the pressure sensor and judges whether the pressure in the fluidized bed layer exceeds a threshold value, if the pressure exceeds the threshold value, the tailing discharging electromagnetic valve is controlled to be opened, and the floatation column body is subjected to tailing discharging. Compared with the prior art, the invention has at least one of the following beneficial effects: A) The bubble generator provided by the invention has the advantages that the bubble forming diameter can be obviously influenced by the pressure of gas passing through the micro-pore plate, the pressure of gas passing through the through-hole is increased, the gas pressure comprises dynamic pressure and static pressure, and the bubble forming mode of the bubble generator with the structure is that bubbles are formed through pulse-shunt micro-pores, so that the bubble generator has the function of simultaneously increasing the dynamic pressure and the static pressure of gas flow. B) The pulse electromagnetic valve is arranged in the bubble generator, and the steady-state air flow provided by the air supply unit can be converted into the pulse air flow by controlling the frequency of the pulse electromagnetic valve and the switching time in one period, so that the steady-state continuous air flow can be converted into the pulse air flow, the dynamic pressure of the air flow can be effectively increased, the bubbles are driven to be desorbed in advance, the