CN102814060A - Defoaming device for flotation concentrate froth from flotation column - Google Patents
Defoaming device for flotation concentrate froth from flotation column Download PDFInfo
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- CN102814060A CN102814060A CN2012102913509A CN201210291350A CN102814060A CN 102814060 A CN102814060 A CN 102814060A CN 2012102913509 A CN2012102913509 A CN 2012102913509A CN 201210291350 A CN201210291350 A CN 201210291350A CN 102814060 A CN102814060 A CN 102814060A
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Abstract
The invention relates to a defoaming device for flotation concentrate froth from a flotation column, and belongs to the technical field of flotation. The device is especially suitable for flotation concentrate froth in coal slime flotation and fly ash flotation. The defoaming device provided by the invention for flotation concentrate froth from the flotation column is composed of a terminal screen group, a main screen group, a side screen group, a middle screen group and a spraying device. Each screen group is composed of 2-3 groups of stainless steel screens; and every two screens keep a distance of 4-6mm and have staggered screen cuts. The spraying device comprises an L-type stainless steel nozzle, a high pressure feeding pipe and an electric regulating valve. The invention has beneficial effects of high defoaming efficiency, thorough defoaming, simple structure, reduced investment and low operation cost; besides, the defoaming device completely solves the trouble caused by bubbles in sequent processing and ensures normal operation of the system.
Description
Technical field
The present invention relates to a kind of defoaming device of flotation column flotation concentrate foam, be particularly useful for the defoaming device of flotation concentrate foam in coal slime flotation, the flyash flotation, belong to the flotation technology field.
Background technology
Flotation column is widely used in coal slime flotation, flyash flotation; Flotation pulp, air and medicament fully mix under the effect of microvesicle generators, after the mineralising; Utilize the effect of bubble and medicament to select concentrate, flotation concentrate carries a large amount of microvesicles and gets into the concentrate feeder also from flowing in the concentrate collecting vessel; One of them changes when going into to wash parameters such as raw ore amount, washing water consumption, the health water yield; The capital makes that the concentration of flotation pulp is instantaneous to change, and when floating agent has little time to adjust, occurs that flotation concentrate carries that a large amount of macrofoams gets into the concentrate feeder and from flowing in the concentrate collecting vessel through regular meeting; These microvesicles and air pocket are difficult to broken voluntarily in the concentrate collecting vessel; Part combines and becomes bigger bubble, causes concentrate bucket bubble cumulative, even overflow; Processing makes troubles to postorder: the ore pulp delivery pump is prone to produce dirt cavitation, serious wear; Problems such as the filter press pan feeding time is long, and filter efficiency is low, and filter cake moisture is big.
Solution commonly used at present is: artificial froth breaking, mechanical agitation type froth breaking and antifoaming agent froth breaking.
Artificial froth breaking: promptly find that concentrate bucket foam is many even soon during overflow as the operation driver, above the concentrate bucket with a large amount of high pressure water washing foams.The deficiency that the method exists: 1) artificial froth breaking, labour intensity is big, and efficient is low; 2) reduced the concentration of flotation concentrate, the filter press pan feeding time is long, and efficient is low.
Mechanical agitation type froth breaking: promptly above the concentrate collecting vessel, increase motor, reductor, main shaft, below main shaft, perpendicular to main shaft the horizontal froth breaking bar in several roads is installed, rotate at a high speed and bubble hit, reach the purpose of froth breaking through the froth breaking bar according to certain intervals.The deficiency that the method exists: 1) defoaming effectiveness is low, froth breaking is not thorough; 2) energy consumption and maintenance cost have been increased.
Antifoaming agent froth breaking: the way froth breaking that promptly in the concentrate collecting vessel, adds antifoaming agent.The deficiency that the method exists: 1) the froth breaking expense is high; 2) antifoaming agent itself is a kind of polluter, has increased the load of subsequent processing device.
Summary of the invention
The objective of the invention is to overcome the weak point of prior art, a kind of defoaming device of flotation column flotation concentrate foam is provided.
The defoaming device of a kind of flotation column flotation concentrate foam of the present invention; Form by terminal screen cloth group, main screen group, both sides screen cloth group, middle screen cloth group, spray equipment; It is characterized in that combining the existing design feature of flotation column concentrate feeder; Each parts of defoaming device are fixed on the position of concentrate feeder medial surface, discharging opening top, reach the purpose of thorough froth breaking.
Described screen cloth group is to be assembled by 2～3 groups of stainless steel mesh, and the distance between the screen cloth is 4-6mm in twos, and the sieve of screen cloth seam is interlaced in twos; Described stainless steel mesh is by trapezoidal welding of stainless steel, bending, shaping, becomes the corrugated screen cloth, and its sieve seam width is 4mm～5mm; Trapezoidal (trapezoidal) top of described stainless steel width 1.6mm, following width is 2mm, highly is 3mm.
Described terminal screen cloth group is assembled by 2 groups of stainless steel mesh, and it mainly acts on: in the time of froth breaking; Reduce the flowing velocity of concentrate liquid; And stockpile a part of concentrate liquid in the bottom, wherein remaining bubble rises gradually, and with the concentrate liquid that descends, shower water collision; Bubble breaking further reaches the purpose of froth breaking.
Described main screen group; Assemble by 3 groups of stainless steel mesh; It mainly acts on: concentrate slurry quickens to slide to the main screen group down through inclined-plane, concentrate feeder bottom, and with the screen cloth collision of main screen group, a part of bubble breaking also stitches through sieve with concentrate liquid and to flow to terminal screen cloth group; Part absorbing bubbles is in main screen group side, through washing and dilution along the dirty shower water of main screen group, because of bubble surface film tension failure makes bubble breaking.
Described both sides screen cloth group is assembled by 2 groups of stainless steel mesh, and it mainly acts on: the bubble that residue is not broken rises to both sides screen cloth group gradually, the injection of shower water dilution, further froth breaking through the top.
Screen cloth group in the middle of described; Assemble by 2 groups of stainless steel mesh; It mainly acts on: when the concentrate foam more for a long time, a part can rise to screen cloth group top, both sides than macrofoam, the meeting that has cross main screen group upper edge get in the middle of above the screen cloth group; The direct bubble crushing of vaporific shower water of the nozzle ejection in spray equipment flow to terminal screen cloth group more certainly after middle screen cloth group froth breaking filters.
Described spray equipment is made up of L type stainless steel nozzle, high pressure feeding pipe, electric control valve.Described L type stainless steel nozzle; Be characterized in having unique absurd fantastic eddy flow cavity configuration, its big and unobstructed runner can reduce or eliminate choking phenomenon, can produce the conical hollow spray shapes; Jeting area circularizes; 51 °～140 ° of spray angles, 2-4mm is adopted in its specified spray orifice aperture, and setting height(from bottom) is screen cloth group top 500mm apart from both sides; Described high pressure feeding pipe one end is connected with nozzle, and the other end is connected with the system high pressure fresh water pipeline, and hydraulic pressure adopts 0.15～0.25MPa; Described electric control valve is installed on the high pressure feeding pipe and at spray nozzle front end, main effect: regulate shower water flow and pressure according to the froth breaking situation, the conserve water resource can field control, also can insert central station of floating dock control.
The invention has the beneficial effects as follows: defoaming effectiveness is high, froth breaking is thorough; Use simple in structure, reduced investment, operating cost is low; Thoroughly solved bubble and processed trouble caused to postorder, the system of assurance works well.
Description of drawings
Fig. 1 is a defoaming device of the present invention installation site front view;
Fig. 2 is a defoaming device of the present invention installation site vertical view;
Fig. 3 is a defoaming device of the present invention installation site A-A cutaway view;
Fig. 4 is a defoaming device front view of the present invention;
Among the figure: the terminal screen cloth group of 1-, 2-main screen group, 3-both sides screen cloth group, screen cloth group in the middle of the 4-, 5-spray equipment.
Fig. 5 is a defoaming device vertical view of the present invention;
Fig. 6 is a defoaming device B-B cutaway view of the present invention;
Fig. 7 is a defoaming device front view I of the present invention place enlarged drawing.
The specific embodiment
As shown in the figure: concentrate slurry quickens to slide to main screen group (2) down through inclined-plane, concentrate feeder bottom, and with the screen cloth collision of main screen group (2), a part of bubble breaking also stitches through sieve with concentrate liquid and to flow to terminal screen cloth group (1); Part absorbing bubbles is in main screen group (2) side, through washing and dilution along the dirty shower water of main screen group (2), because of bubble surface film tension failure makes bubble breaking; The bubble that residue is not broken rises to both sides screen cloth groups (3) gradually, the injection of shower water dilution, further froth breaking through the top.When the concentrate foam more for a long time; A part can rise to both sides screen cloth groups (3) top than macrofoam; The meeting that has is crossed main screen group (2) upper edge and is got into above the middle screen cloth group (4); The direct bubble crushing of vaporific shower water of the nozzle ejection in spray equipment (5) is filtered from flowing to terminal screen cloth group (1) froth breaking after middle screen cloth group (4) froth breaking filters again, flow to discharging opening at last and discharges.
What certain coal preparation plant floatation system Central Plains debubbling method adopted is mechanical defoaming, and defoaming effect is bad, energy consumption and maintenance cost are higher.Adopt above-mentioned defoaming device now, wherein L type stainless steel nozzle employing interface size is 1/4 inch (internal thread), specified spray orifice aperture 2mm, and when adopting the water under high pressure feed pressure to be 0.15MPa, nozzle flow is 1.1 liters/minute.Prove that through actual motion defoaming effectiveness is high, froth breaking is thorough; Every flotation column is 396 liters of water requirements per hour, the conserve water resource.
Certain flyash integrated treatment company adopts the charcoal in the XZWXJ30 flotation column flotation flyash; For guaranteeing that flotation tailing (low-carbon (LC) flyash loss on ignition≤5%) reaches the standard of first level flour coal ash; In the flotation raw ore, add more foaming agent and collecting agent, per hour the about 100m of flotation concentrate slurry
3, but the flotation concentrate foam is more and bubble ratio is harder, difficult broken bubble.Successively with artificial froth breaking, mechanical defoaming, effect is all bad.
Adopt above-mentioned defoaming device now; Wherein the sieve of Stainless Steel screen cloth seam is 5mm; Distance between the Stainless Steel screen cloth is 6mm in twos, and L type stainless steel nozzle employing interface size is 1/4 inch (internal thread) in addition, specified spray orifice aperture 2.4mm; When adopting the water under high pressure feed pressure to be 0.20MPa, nozzle flow is 1.9 liters/minute.Prove through actual motion, through the about 50m of concentrate slurry of each defoaming device
3/ h, and the about 342L/h of shower water, the conserve water resource, and defoaming effect is good.
Claims (7)
1. the defoaming device of a flotation column flotation concentrate foam is characterized in that: be made up of terminal screen cloth group, main screen group, both sides screen cloth group, middle screen cloth group, spray equipment, each parts is fixed on the position of concentrate feeder medial surface, discharging opening top.
2. the defoaming device of a kind of flotation column flotation concentrate foam according to claim 1 is characterized in that: described screen cloth group is to be assembled by 2～3 groups of stainless steel mesh, and the distance between the screen cloth is 4-6mm in twos, and the sieve of screen cloth seam is interlaced in twos.
3. the defoaming device of a kind of flotation column flotation concentrate foam according to claim 1 is characterized in that: described terminal screen cloth group is assembled by 2 groups of stainless steel mesh.
4. the defoaming device of a kind of flotation column flotation concentrate foam according to claim 1 is characterized in that: described main screen group is assembled by 3 groups of stainless steel mesh.
5. the defoaming device of a kind of flotation column flotation concentrate foam according to claim 1 is characterized in that: described both sides screen cloth group is assembled by 2 groups of stainless steel mesh.
6. the defoaming device of a kind of flotation column flotation concentrate foam according to claim 1 is characterized in that: screen cloth group in the middle of described is assembled by 2 groups of stainless steel mesh.
7. the defoaming device of a kind of flotation column flotation concentrate foam according to claim 1 is characterized in that: described spray equipment, form by L type stainless steel nozzle, high pressure feeding pipe, electric control valve; Described L type stainless steel nozzle setting height(from bottom) is screen cloth group top 500mm apart from both sides; Described high pressure feeding pipe one end is connected with nozzle, and the other end is connected with the system high pressure fresh water pipeline, and hydraulic pressure adopts 0.15～0.25MPa; Described electric control valve is installed on the high pressure feeding pipe and at spray nozzle front end.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210291350.9A CN102814060B (en) | 2012-08-11 | 2012-08-11 | Defoaming device for flotation concentrate froth from flotation column |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210291350.9A CN102814060B (en) | 2012-08-11 | 2012-08-11 | Defoaming device for flotation concentrate froth from flotation column |
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| CN102814060A true CN102814060A (en) | 2012-12-12 |
| CN102814060B CN102814060B (en) | 2015-04-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104069953A (en) * | 2013-03-29 | 2014-10-01 | 沈阳铝镁设计研究院有限公司 | Simple hydraulic defoaming device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201552116U (en) * | 2009-11-24 | 2010-08-18 | 成都王牌汽车集团股份有限公司 | Spraying device capable of effectively preventing foam from overflowing during spraying |
| CN201572547U (en) * | 2009-12-28 | 2010-09-08 | 苏州嘉净水处理设备有限公司 | Defoaming device |
| CN202356197U (en) * | 2011-11-24 | 2012-08-01 | 中国铝业股份有限公司 | Foam eliminating device |
| CN202724765U (en) * | 2012-08-11 | 2013-02-13 | 山东莱芜煤矿机械有限公司 | Defoaming device for flotation concentrate froth from flotation column |
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2012
- 2012-08-11 CN CN201210291350.9A patent/CN102814060B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201552116U (en) * | 2009-11-24 | 2010-08-18 | 成都王牌汽车集团股份有限公司 | Spraying device capable of effectively preventing foam from overflowing during spraying |
| CN201572547U (en) * | 2009-12-28 | 2010-09-08 | 苏州嘉净水处理设备有限公司 | Defoaming device |
| CN202356197U (en) * | 2011-11-24 | 2012-08-01 | 中国铝业股份有限公司 | Foam eliminating device |
| CN202724765U (en) * | 2012-08-11 | 2013-02-13 | 山东莱芜煤矿机械有限公司 | Defoaming device for flotation concentrate froth from flotation column |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104069953A (en) * | 2013-03-29 | 2014-10-01 | 沈阳铝镁设计研究院有限公司 | Simple hydraulic defoaming device and method |
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| CN102814060B (en) | 2015-04-01 |
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