CN106269497A - A kind of wet screening feed pressure relief device and using method thereof - Google Patents
A kind of wet screening feed pressure relief device and using method thereof Download PDFInfo
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- CN106269497A CN106269497A CN201510358401.9A CN201510358401A CN106269497A CN 106269497 A CN106269497 A CN 106269497A CN 201510358401 A CN201510358401 A CN 201510358401A CN 106269497 A CN106269497 A CN 106269497A
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- pressure relief
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- relief slot
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- discharging opening
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Abstract
The present invention relates to a kind of wet screening feed pressure relief device and using method thereof, this device in ore pulp wet screening technique, belongs to technical field of alumina production after bauxite grinds.Use gas pressure relief slot as pressure relief device, the feed pipe being connected with charging aperture stretches in gas pressure relief slot under gas pressure relief slot, inverted cone shape pressure relief plate is located in gas pressure relief slot, is positioned at directly over feed pipe, and pressure relief plate is fixed on gas pressure relief slot top by fixed support, and discharging opening is positioned at gas pressure relief slot lower sidewall；Air vent is positioned at gas pressure relief slot top, and air vent communicates with air all the time, it is ensured that in gas pressure relief slot, pressure is atmospheric pressure.The present invention utilizes gas pressure relief slot as pressure relief equipment, use feed with pressure, pressure relief plate pressure release, gravity flow discharging technology, can ensure that low pressure or the normal pressure discharging of high pressure charging ore pulp, not only decrease the impact to wet screening equipment polyurethane screen, extend screen cloth service life, and sieve aperture deformation can be reduced, improve the screening efficiency of wet screening.
Description
Technical field
The present invention relates to a kind of wet screening feed pressure relief device and using method thereof, this device is ore deposit after bauxite grinds
In slurry wet screening technique, belong to technical field of alumina production.
Background technology
Alumina producing is using bauxite as primary raw material, and bauxite utilizes raw material grinding mill to pass through to add after crushing
Enter suitable circulation alkali liquor and be milled into the bauxite ore pulp of release mesh, then through pre-desiliconizing, dissolution, seeded precipitation,
The operation final production finished product aluminium oxidies such as aluminium hydroxide filtration and roasting.It is important in alumina producing that raw material grinds
One of operation, its grind after ore pulp admittedly containing the techniques such as postorder pre-desiliconizing, dissolution are had very important shadow
Ring.
For a long time, bauxite grinds main employing hydrocyclone as classifying equipoment, overflowing of hydrocyclone
Stream feeds the finishing operations such as pre-desiliconizing as qualified ore pulp, and underflow feeds grinding machine the most again.According to field data,
The overflow of hydrocyclone is admittedly containing generally remaining in about 350g/L, and concentration is relatively low.Up-to-date achievement in research shows,
Part researcher use a kind of Wet oscillating screen (being the most all referred to as wet screening) as classifying equipoment, can be by
After mill, qualified ore pulp is admittedly containing improving to 400～about 800g/L, significantly decreases the quantity of pre-desilication tank, fall
Low equipment investment.
The material-uploading style of wet screening is typically with frequency conversion Pulp pump and ore pulp pressurization after mill is fed screen cloth, frequency conversion slurry
Pump with mill after mine pulp trough liquid level chain, its flow and pressure constantly change.Due to qualified ore pulp product after mill
Granularity is relatively thin, and in order to effectively control product granularity, wet screening screen cloth generally uses the materials such as polyurethane.Polyurethane
Screen cloth, under the impact of high pressure ore pulp, easily causes sieve aperture deformation and runs thick phenomenon, and high pressure ore pulp easily causes
Sieve breakage, further results in screening efficiency and reduces, and impact is normal to be produced.
Summary of the invention
It is an object of the invention to provide a kind of wet screening feed pressure relief device and using method thereof, use feed with pressure,
Pressure relief plate pressure release, gravity flow discharging, it is ensured that wet screening low pressure feed, can effectively solve high pressure ore pulp and cause screen cloth
Harmful effect, improve polyurethane screen service life, improve wet screening equipment work efficiency.
The technical scheme is that
A kind of wet screening feed pressure relief device, uses gas pressure relief slot as pressure relief device, and this device includes charging aperture, enters
Material pipe, pressure relief plate, fixed support, discharging opening, air vent, gas pressure relief slot, concrete structure is as follows:
The feed pipe being connected with charging aperture stretches in gas pressure relief slot under gas pressure relief slot, and inverted cone shape pressure relief plate is located at gas pressure relief slot
In, be positioned at directly over feed pipe, pressure relief plate is fixed on gas pressure relief slot top by fixed support, and discharging opening is positioned to be let out
Indent lower sidewall；Air vent is positioned at gas pressure relief slot top, and air vent communicates with air all the time, it is ensured that in gas pressure relief slot
Pressure is atmospheric pressure.
Described wet screening feed pressure relief device, gas pressure relief slot base plate is domatic, and slope aspect discharging opening prevents because of coarse granule
The deposition of material and cause discharging opening to block.
Described wet screening feed pressure relief device, in order to ensure ore pulp inlet-outlet flow balance, diameter d is the least for discharging opening
In intake port D.
Described wet screening feed pressure relief device, feed pipe is suitable for reading away from gas pressure relief slot bottom land distance H, discharging opening centre-to-centre spacing
Gas pressure relief slot bottom land distance h；In order to prevent ore pulp from flowing backwards, on feed pipe 2, open height H is more than discharging opening 5 height.
Described wet screening feed pressure relief device, the quantity of discharging opening is more than one.
The using method of described wet screening feed pressure relief device, after mill, qualified ore pulp is after frequency conversion Pulp pump pressurizes,
It is connected with gas pressure relief slot charging aperture by pipeline, sprays after feed pipe；After the ore pulp of ejection runs into pressure relief plate,
By the retroaction of pressure relief plate, turn to and move downward and be stored in gas pressure relief slot bottom land；When pulp slurry in gas pressure relief slot
When face is higher than discharging opening center, ore pulp goes out from baric flow；Thus, utilize gas pressure relief slot as pressure relief equipment, use band
Pressure feed, pressure relief plate pressure release, gravity flow discharging technology realize low pressure or the normal pressure discharging of ore pulp with pressure.
Advantages of the present invention and having the beneficial effect that:
1, the present invention utilizes gas pressure relief slot as pressure relief device, uses feed with pressure, pressure relief plate pressure release, gravity flow discharging
Technique, not only reduces the pressure into sieve ore pulp, it is achieved the normal pressure discharging of ore pulp with pressure, and improves wet screening
Screening efficiency and the service life of polyurethane screen.
2, the present invention is in order to reduce the pressure into sieve ore pulp, it is ensured that the continual and steady operation of wet screening, improves screening effect
Rate.
Accompanying drawing explanation
Fig. 1 is wet screening feed pressure relief device structural representation of the present invention.
In figure, 1, charging aperture；2, feed pipe；3, pressure relief plate；4, fixed support；5, discharging opening；6、
Air vent；7, gas pressure relief slot；8, gas pressure relief slot base plate.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings, but protection scope of the present invention is not limited by embodiment
System.
As it is shown in figure 1, wet screening feed pressure relief device of the present invention, use gas pressure relief slot as pressure relief device, mainly wrap
Include charging aperture 1, feed pipe 2, pressure relief plate 3, fixed support 4, discharging opening 5, air vent 6, gas pressure relief slot 7
Deng, concrete structure is as follows:
The feed pipe 2 being connected with charging aperture 1 stretches into for 7 times in gas pressure relief slot 7 from gas pressure relief slot, inverted cone shape pressure relief plate 3
Being located in gas pressure relief slot 7, be positioned at directly over feed pipe 2, pressure relief plate 3 is fixed on gas pressure relief slot by fixed support 4
7 tops, discharging opening 5 is positioned at gas pressure relief slot 7 lower sidewall；Air vent 6 is positioned at gas pressure relief slot 7 top, air vent 6
All the time communicate with air, it is ensured that in gas pressure relief slot 7, pressure is atmospheric pressure.
Gas pressure relief slot base plate 8 is domatic, slope aspect discharging opening 5, prevents from causing discharging because of the deposition of coarse granule material
Mouth 5 blocking.In order to ensure ore pulp inlet-outlet flow balance, discharging opening 5 diameter d is not less than charging aperture 1 diameter D.
Feed pipe 2 is suitable for reading away from gas pressure relief slot bottom land distance H, discharging opening 5 centre-to-centre spacing gas pressure relief slot bottom land distance h.In order to anti-
Only ore pulp flows backwards, and on feed pipe 2, open height H is more than discharging opening 5 height h.The quantity of discharging opening 5 is not limited to
At 1, two or more can be set.
The work process of the present invention is as follows:
After mill, qualified ore pulp is after frequency conversion Pulp pump pressurizes, and is connected with gas pressure relief slot charging aperture 1 by pipeline, passes through
Spray after feed pipe 2.After the ore pulp of ejection runs into pressure relief plate 3, by the retroaction of pressure relief plate 3, turn to also
Move downward and be stored in gas pressure relief slot bottom land.When in gas pressure relief slot 7, mineral syrup liquid is higher than discharging opening 5 center, ore deposit
Slurry goes out from baric flow.
Result shows, present invention can ensure that low pressure or the normal pressure discharging of high pressure charging ore pulp, and it is right not only to decrease
The impact of wet screening equipment polyurethane screen, extends screen cloth service life, and can reduce sieve aperture deformation, carry
The high screening efficiency of wet screening.
Claims (6)
1. a wet screening feed pressure relief device, it is characterised in that use gas pressure relief slot as pressure relief device, this device
Including charging aperture, feed pipe, pressure relief plate, fixed support, discharging opening, air vent, gas pressure relief slot, concrete structure
As follows:
The feed pipe being connected with charging aperture stretches in gas pressure relief slot under gas pressure relief slot, and inverted cone shape pressure relief plate is located at gas pressure relief slot
In, be positioned at directly over feed pipe, pressure relief plate is fixed on gas pressure relief slot top by fixed support, and discharging opening is positioned to be let out
Indent lower sidewall；Air vent is positioned at gas pressure relief slot top, and air vent communicates with air all the time, it is ensured that in gas pressure relief slot
Pressure is atmospheric pressure.
2. according to the wet screening feed pressure relief device described in claim 1, it is characterised in that gas pressure relief slot base plate is slope
Face, slope aspect discharging opening, prevent from causing discharging opening to block because of the deposition of coarse granule material.
3. according to the wet screening feed pressure relief device described in claim 1, it is characterised in that in order to ensure that ore pulp enters
Outflow balances, and discharging opening diameter d is not less than intake port D.
4. according to the wet screening feed pressure relief device described in claim 1, it is characterised in that feed pipe is suitable for reading away from letting out
Indent bottom land distance H, discharging opening centre-to-centre spacing gas pressure relief slot bottom land distance h；In order to prevent ore pulp from flowing backwards, feed pipe 2
Upper open height H is more than discharging opening 5 height.
5. according to the wet screening feed pressure relief device described in claim 1, it is characterised in that the quantity of discharging opening is
More than one.
6. the using method of the wet screening feed pressure relief device described in a claim 1, it is characterised in that after mill
Qualified ore pulp, after frequency conversion Pulp pump pressurizes, is connected with gas pressure relief slot charging aperture by pipeline, sprays after feed pipe
Go out；After the ore pulp of ejection runs into pressure relief plate, by the retroaction of pressure relief plate, turn to and move downward and be stored in
Gas pressure relief slot bottom land；When in gas pressure relief slot, mineral syrup liquid is higher than discharging opening center, ore pulp goes out from baric flow；Thus, profit
With gas pressure relief slot as pressure relief equipment, feed with pressure, pressure relief plate pressure release, gravity flow discharging technology is used to realize ore deposit with pressure
The low pressure of slurry or normal pressure discharging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510358401.9A CN106269497B (en) | 2015-06-26 | 2015-06-26 | A kind of wet screening feed pressure relief device and its application method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510358401.9A CN106269497B (en) | 2015-06-26 | 2015-06-26 | A kind of wet screening feed pressure relief device and its application method |
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| Publication Number | Publication Date |
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| CN106269497A true CN106269497A (en) | 2017-01-04 |
| CN106269497B CN106269497B (en) | 2018-09-21 |
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| CN201510358401.9A Active CN106269497B (en) | 2015-06-26 | 2015-06-26 | A kind of wet screening feed pressure relief device and its application method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202212034U (en) * | 2011-08-31 | 2012-05-09 | 邹平县海华纸业有限公司 | Continuous settling column |
| JP4979673B2 (en) * | 2008-11-10 | 2012-07-18 | 株式会社アクト | Wastewater treatment equipment |
| CN103318572A (en) * | 2012-03-22 | 2013-09-25 | 沈阳铝镁设计研究院有限公司 | Storage equipment used in alumina industry |
| CN203565341U (en) * | 2013-11-27 | 2014-04-30 | 唐山海普科技有限公司 | Overflow type water replenishing tank for high-frequency vibrating laminated screen |
| CN203565352U (en) * | 2013-11-27 | 2014-04-30 | 唐山海普科技有限公司 | Overflow forced distributing pulp feeder |
-
2015
- 2015-06-26 CN CN201510358401.9A patent/CN106269497B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4979673B2 (en) * | 2008-11-10 | 2012-07-18 | 株式会社アクト | Wastewater treatment equipment |
| CN202212034U (en) * | 2011-08-31 | 2012-05-09 | 邹平县海华纸业有限公司 | Continuous settling column |
| CN103318572A (en) * | 2012-03-22 | 2013-09-25 | 沈阳铝镁设计研究院有限公司 | Storage equipment used in alumina industry |
| CN203565341U (en) * | 2013-11-27 | 2014-04-30 | 唐山海普科技有限公司 | Overflow type water replenishing tank for high-frequency vibrating laminated screen |
| CN203565352U (en) * | 2013-11-27 | 2014-04-30 | 唐山海普科技有限公司 | Overflow forced distributing pulp feeder |
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| Publication number | Publication date |
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| CN106269497B (en) | 2018-09-21 |
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