CN103868823A - Device and method for detecting underflow concentration pressure difference of inclined plate thickener - Google Patents
Device and method for detecting underflow concentration pressure difference of inclined plate thickener Download PDFInfo
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- CN103868823A CN103868823A CN201410090407.8A CN201410090407A CN103868823A CN 103868823 A CN103868823 A CN 103868823A CN 201410090407 A CN201410090407 A CN 201410090407A CN 103868823 A CN103868823 A CN 103868823A
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- 239000002562 thickening agent Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title abstract description 8
- 241000446313 Lamella Species 0.000 claims description 25
- 238000001514 detection method Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 9
- 230000001133 acceleration Effects 0.000 claims description 5
- 230000005484 gravity Effects 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000002285 radioactive effect Effects 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 4
- 239000011707 mineral Substances 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 238000005065 mining Methods 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 4
- 230000005514 two-phase flow Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000407 epitaxy Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a device and a method for detecting the underflow concentration pressure difference of an inclined plate thickener, and belongs to the technical field of mineral dressing in mineral processing of mining metallurgical engineering. The device comprises a high-pressure air pipe, a low-pressure air pipe, a compressed air source and a differential pressure sensor, wherein the high-pressure air pipe and the low-pressure air pipe are respectively provided with an air pipe outlet B and an air pipe outlet A; the outlets of the high-pressure air pipe and the low-pressure air pipe are respectively formed in the lower ends of conical grooves of the inclined plate thickener, and the vertical height difference is H; the top ends of the high-pressure air pipe and the low-pressure air pipe are connected with the compressed air source through throttling valves; the upper ends of the high-pressure air pipe and the low-pressure air pipe are respectively connected with a high-pressure port and a low-pressure port of the differential pressure sensor through a three-way joint. According to the method, the pressure difference (delta P) between the high-pressure air pipe and the low-pressure air pipe is calculated, a coefficient (K) is calculated, and then the underflow slurry concentration C of an inclined plate is calculated. Without a radioactive source, the device has the advantages of low maintenance frequency, long service life, low cost and the like. The method is simple, practical and high in accuracy.
Description
Technical field
The present invention relates to a kind of lamella thickener underflow density pressure test device and detection method, belong to the technique of preparing field in the processing of mining metallurgical engineering mineral.
Background technology
Now along with the improving constantly of mineral processing and chemical field environmental requirement, the mine tailing in engineering to be administered more and more tight, technical requirement is more and more higher, and the one, requirement recycling water utilization rate is more and more higher, quality is more and more higher; The 2nd, requirement material enters Tailings Dam completely, and fed distance is far away, and handling charges is high; The lamella thickener growing up has in recent years been a kind of high-efficiency appliance of these requirements, and swash plate is as the crucial main equipment of mine tailing engineering, and his operational efficiency directly has influence on benefit and the investment of mine tailing construction quality and factories and miness.
In lamella thickener automatic control process, the following technical matters of only controlling well could improve lamella thickener efficiency, as problem, underflow that backwater requires are carried the problem requiring.The key to the issue that wherein underflow conveying requires is to control the concentration of swash plate underflow, first concentration how to control swash plate underflow must detect the concentration of swash plate underflow, traditional detection swash plate underflow density is main mainly with radioactive source sensor, also useful ultrasound examination.Although concentration sensor technology maturation, reliability with radioactive source are high, be subject to strict control and the constraint of public security, environmental protection, public security department, price is more expensive in addition, and now increasing factories and miness are all refused to use or restriction is used.And ultrasound wave concentration sensor, in high concentration, coarse particle two-phase flow, operation technique is also not overripened at present, and price, at present also in research, trial period.
Summary of the invention
The problem and the deficiency that exist for above-mentioned prior art, the invention provides a kind of lamella thickener underflow density pressure test device and detection method.This device does not have radioactive source, and maintenance load is few, the advantage such as do not have that not wearing and tearing, the maintenance frequency are low, long service life, expense are low, and this detection method is comparatively simple and practical, and precision is higher, and the present invention is achieved through the following technical solutions.
The theoretical foundation of detection method of the present invention is, as shown in Figure 1, in a container, is filled with a kind of homogeneous liquid, and 2 of the A that is H in vertical height and B locate, and the pressure differential between AB is:
A kind of lamella thickener underflow density pressure test device, comprise high-pressure air tube 1, low-pressure air pipe 2, compressed air source 3 and differential pressure pick-up 4, described high-pressure air tube 1 is respectively equipped with air hose outlet B and air hose outlet A with low-pressure air pipe 2, high-pressure air tube 1 and low-pressure air pipe 2 export and are arranged on respectively lamella thickener cone tank lower end and the vertical discrepancy in elevation is H, high-pressure air tube 1 is connected compressed air source 3 with low-pressure air pipe 2 tops by throttling valve, high-pressure air tube 1 is connected with high pressure and the low-pressure port of differential pressure pick-up 4 respectively by three-way connection with low-pressure air pipe 2 upper ends.
Described high-pressure air tube 1 communicates with ore pulp by poromerics respectively with low-pressure air pipe 2 lower ends.
A kind of lamella thickener underflow density pressure differential detection method, its concrete steps are as follows:
Step 1: first determine that the high-pressure air tube 1 that is arranged on lamella thickener cone tank lower end exports the vertical discrepancy in elevation H between the two exporting with low-pressure air pipe 2;
Step 2: the pressurized air of different pressures 3 is transported in high-pressure air tube 1 and low-pressure air pipe 2 by throttling valve, then reads the pressure differential between high-pressure air tube 1 and low-pressure air pipe 2 from differential pressure pick-up 4
;
Step 3: detect swash plate underflow pulp density through sample analysis
, according to formula
with
, obtain coefficient
, in formula
for the pressure reduction in step 2,
for the vertical height of two air hose outlets in step 1,
for acceleration of gravity,
for A, B point-to-point transmission ore pulp average density,
,
for coefficient;
the swash plate underflow pulp density detecting for sample analysis;
Step 4: then according to formula
,
, obtain the swash plate underflow pulp density C in any moment, the weight percent concentration that in formula, C is ore pulp,
for pulp density,
for the density of ore in ore pulp,
for coefficient.
Detection side's ratio juris of the present invention is, it in lamella thickener, not homogeneous liquid, the ore pulp that the underflow density that needs detection is two-phase flow, because solid particle in the two-phase flow of lamella thickener inside is laminar flow free setting, lamella thickener prolongs the density of vertical direction, density 1(is the density that A is ordered as shown in Figure 3) and density 2(be the density that B is ordered) in linear relation, as straight line cd.As long as record the pressure differential of 2 of A, B, just can calculate the two-phase flow average density of A, B point-to-point transmission
aB,
aBbe exactly the abscissa value of upper certain point of straight line cd, very simply just can calculate the density value that B is ordered by epitaxy
(sample and demarcate by reality), because lamella thickener is in back taper bottom, i.e. near position vent pipe, flowing of fluid is not laminar flow but turbulent flow, flow velocity is higher, can not obtain near the actual pressure of putting this by the method for differential static pressure, but the density that the pulp density that this E is ordered almost can be ordered with B
replace, just have certain deviation, can pass through Z-factor K
0revise,
, in formula
for swash plate underflow pulp density, K
0for Z-factor,
for the density value that B is ordered, also can be written as
,
, in formula
for the pressure reduction of 2 of A, B,
be the vertical height of two air hose outlets,
for acceleration of gravity,
for A, B point-to-point transmission ore pulp average density,
,
for coefficient;
for swash plate underflow pulp density.
Detect by sampling
swash plate underflow pulp density, then just can try to achieve (demarcation) K
0,
,
;
The mass percent concentration of ore pulp can be:
,
, the weight percent concentration that in formula, C is ore pulp,
for pulp density,
for the density of ore in ore pulp,
for coefficient.
The invention has the beneficial effects as follows: (1) this device does not have radioactive source, and maintenance load is few the advantage such as do not have that not wearing and tearing, the maintenance frequency are low, long service life, expense are low; (2) this detection method is comparatively simple and practical, and precision is higher.
Accompanying drawing explanation
Fig. 1 is the pressure differential schematic diagram of the homogeneous liquid of the principle of the invention;
Fig. 2 is lamella thickener underflow density pressure test device structural representation of the present invention;
Fig. 3 is lamella thickener underflow density pressure test device principle schematic of the present invention.
In figure: 1-high-pressure air tube, 2-low-pressure air pipe, 3-compressed air source, 4-differential pressure pick-up, A is that air hose 2 exports, and B is that air hose 1 exports, and H is the vertical discrepancy in elevation of 2 of A, B, and E is swash plate apex.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
As shown in Fig. 1 to 2, this lamella thickener underflow density pressure test device, comprise high-pressure air tube 1, low-pressure air pipe 2, compressed air source 3 and differential pressure pick-up 4, described high-pressure air tube 1 is respectively equipped with air hose outlet B and air hose outlet A with low-pressure air pipe 2, high-pressure air tube 1 and low-pressure air pipe 2 export and are arranged on respectively lamella thickener cone tank lower end and the vertical discrepancy in elevation is H, high-pressure air tube 1 is connected compressed air source 3 with low-pressure air pipe 2 tops by throttling valve, high-pressure air tube 1 is connected with high pressure and the low-pressure port of differential pressure pick-up 4 respectively by three-way connection with low-pressure air pipe 2 upper ends.
Wherein high-pressure air tube 1 communicates with ore pulp by poromerics respectively with low-pressure air pipe 2 lower ends.
As shown in Figure 3, this lamella thickener underflow density pressure differential detection method, its concrete steps are as follows:
Step 1: first determine that the high-pressure air tube 1 that is arranged on lamella thickener cone tank lower end exports the vertical discrepancy in elevation H between the two exporting with low-pressure air pipe 2;
Step 2: the pressurized air of different pressures 3 is transported in high-pressure air tube 1 and low-pressure air pipe 2 by throttling valve, then reads the pressure differential between high-pressure air tube 1 and low-pressure air pipe 2 from differential pressure pick-up 4
;
Step 3: detect swash plate underflow pulp density through sample analysis
, according to formula
with
, obtain coefficient
, in formula
for the pressure reduction in step 2,
for the vertical height of two air hose outlets in step 1,
for acceleration of gravity,
for A, B point-to-point transmission ore pulp average density,
,
for coefficient;
the swash plate underflow pulp density detecting for sample analysis;
Step 4: then according to formula
,
, obtain the swash plate underflow pulp density C in any moment, the weight percent concentration that in formula, C is ore pulp,
for pulp density,
for the density of ore in ore pulp,
for coefficient.
Claims (3)
1. a lamella thickener underflow density pressure test device, it is characterized in that: comprise high-pressure air tube (1), low-pressure air pipe (2), compressed air source (3) and differential pressure pick-up (4), described high-pressure air tube (1) is respectively equipped with air hose outlet B and air hose outlet A with low-pressure air pipe (2), high-pressure air tube (1) is arranged on respectively lamella thickener cone tank lower end with low-pressure air pipe (2) outlet and the vertical discrepancy in elevation is H, high-pressure air tube (1) is connected compressed air source (3) with low-pressure air pipe (2) top by throttling valve, high-pressure air tube (1) is connected with high pressure and the low-pressure port of differential pressure pick-up (4) respectively by three-way connection with low-pressure air pipe (2) upper end.
2. lamella thickener underflow density pressure test device according to claim 1, is characterized in that: described high-pressure air tube (1) communicates with ore pulp by poromerics respectively with low-pressure air pipe (2) lower end.
3. a lamella thickener underflow density pressure differential detection method, is characterized in that concrete steps are as follows:
Step 1: the vertical discrepancy in elevation H between the two that first determines high-pressure air tube (1) outlet with low-pressure air pipe (2) outlet that are arranged on lamella thickener cone tank lower end;
Step 2: the pressurized air of different pressures (3) is transported in high-pressure air tube (1) and low-pressure air pipe (2) by throttling valve, then reads the pressure differential between high-pressure air tube (1) and low-pressure air pipe (2) from differential pressure pick-up (4)
;
Step 3: detect swash plate underflow pulp density through sample analysis
, according to formula
with
, obtain coefficient
, in formula
for the pressure reduction in step 2,
for the vertical height of two air hose outlets in step 1,
for acceleration of gravity,
for A, B point-to-point transmission ore pulp average density,
,
for coefficient;
the swash plate underflow pulp density detecting for sample analysis;
Step 4: then according to formula
,
, obtain the swash plate underflow pulp density C in any moment, the weight percent concentration that in formula, C is ore pulp,
for pulp density,
for the density of ore in ore pulp,
for coefficient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410090407.8A CN103868823B (en) | 2014-03-13 | 2014-03-13 | A kind of lamella thickener underflow density pressure test device and detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410090407.8A CN103868823B (en) | 2014-03-13 | 2014-03-13 | A kind of lamella thickener underflow density pressure test device and detection method |
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| Publication Number | Publication Date |
|---|---|
| CN103868823A true CN103868823A (en) | 2014-06-18 |
| CN103868823B CN103868823B (en) | 2016-08-24 |
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|---|---|---|---|
| CN201410090407.8A Expired - Fee Related CN103868823B (en) | 2014-03-13 | 2014-03-13 | A kind of lamella thickener underflow density pressure test device and detection method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237069A (en) * | 2014-09-19 | 2014-12-24 | 沈阳建筑大学 | Ore pulp densitometer |
| CN112903974A (en) * | 2021-03-19 | 2021-06-04 | 青海省地质调查局 | Deep deposit investigation prediction system |
| CN113599863A (en) * | 2021-08-13 | 2021-11-05 | 山东科技大学 | Early warning type anti-blocking method for column type rake-free paste thickener |
Citations (9)
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|---|---|---|---|---|
| SU675346A2 (en) * | 1977-09-05 | 1979-07-25 | Ki T I Pishchevoj Promy | Device for measuring pulp density in reservoir |
| CN2036667U (en) * | 1988-08-05 | 1989-04-26 | 华北石油管理局钻井工艺研究所 | Floating air-blown type differential densimeter |
| CN2058989U (en) * | 1990-01-06 | 1990-07-04 | 北京市西城新开通用试验厂 | Liquid specific gravity and level ineasuring device |
| CN1053125A (en) * | 1990-01-06 | 1991-07-17 | 北京市西城新开通用试验厂 | A kind of measuring unit for liquid specific gravity and level |
| CN1053124A (en) * | 1990-01-06 | 1991-07-17 | 北京市西城新开通用试验厂 | A kind of physical parameter collector for slurry |
| CN2114158U (en) * | 1992-02-21 | 1992-08-26 | 煤炭科学研究总院唐山分院 | Double capillary gradiomanometer |
| CN202110117U (en) * | 2011-06-15 | 2012-01-11 | 金川集团有限公司 | Air blown on-line ore pulp density/concentration measuring device |
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| CN203758872U (en) * | 2014-03-13 | 2014-08-06 | 昆明理工大学 | Underflow concentration differential pressure detecting device of inclined plate thickener |
-
2014
- 2014-03-13 CN CN201410090407.8A patent/CN103868823B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU675346A2 (en) * | 1977-09-05 | 1979-07-25 | Ki T I Pishchevoj Promy | Device for measuring pulp density in reservoir |
| CN2036667U (en) * | 1988-08-05 | 1989-04-26 | 华北石油管理局钻井工艺研究所 | Floating air-blown type differential densimeter |
| CN2058989U (en) * | 1990-01-06 | 1990-07-04 | 北京市西城新开通用试验厂 | Liquid specific gravity and level ineasuring device |
| CN1053125A (en) * | 1990-01-06 | 1991-07-17 | 北京市西城新开通用试验厂 | A kind of measuring unit for liquid specific gravity and level |
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| CN2114158U (en) * | 1992-02-21 | 1992-08-26 | 煤炭科学研究总院唐山分院 | Double capillary gradiomanometer |
| CN102538901A (en) * | 2010-12-27 | 2012-07-04 | 贵阳铝镁设计研究院有限公司 | Self-evaporator liquid level measuring device based on dual-pipe air blowing method |
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| CN203758872U (en) * | 2014-03-13 | 2014-08-06 | 昆明理工大学 | Underflow concentration differential pressure detecting device of inclined plate thickener |
Non-Patent Citations (1)
| Title |
|---|
| 刘晓辉等: "膏体充填尾矿浓密规律初探", 《金属矿山》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104237069A (en) * | 2014-09-19 | 2014-12-24 | 沈阳建筑大学 | Ore pulp densitometer |
| CN112903974A (en) * | 2021-03-19 | 2021-06-04 | 青海省地质调查局 | Deep deposit investigation prediction system |
| CN112903974B (en) * | 2021-03-19 | 2023-02-03 | 青海省地质调查局 | Deep deposit investigation prediction system |
| CN113599863A (en) * | 2021-08-13 | 2021-11-05 | 山东科技大学 | Early warning type anti-blocking method for column type rake-free paste thickener |
| CN113599863B (en) * | 2021-08-13 | 2022-07-12 | 山东科技大学 | Early warning type anti-blocking method for column type rake-free paste thickener |
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| Publication number | Publication date |
|---|---|
| CN103868823B (en) | 2016-08-24 |
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Granted publication date: 20160824 |