CN105148574A - Bottom flow shearing and thickening device and method for thickener - Google Patents
Bottom flow shearing and thickening device and method for thickener Download PDFInfo
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- CN105148574A CN105148574A CN201510613694.0A CN201510613694A CN105148574A CN 105148574 A CN105148574 A CN 105148574A CN 201510613694 A CN201510613694 A CN 201510613694A CN 105148574 A CN105148574 A CN 105148574A
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Abstract
The invention discloses a bottom flow shearing and thickening device and method for a thickener. A sucking pipe is communicated with one side of the bottom of a thickener cone, a feeding pipe is arranged in the middle of the thickener cone in the mode of surrounding the cone by a round, after surrounding the cone by one round, the feeding pipe is connected with the sucking pipe through a circulating pump, and multiple symmetrical spraying branches with valves are arranged on the feeding pipe and enter in the mode of being perpendicular to the side wall of the cone. The sucking pipe is sequentially provided with a main valve, a blowdown valve, a sucking pipe decontaminating backwash water valve, a decontaminating backwash water inlet and a feeding pipe decontaminating backwash water valve, and a main valve is arranged on the feeding pipe. An ore pulp self-circulation mode is adopted to evenly mix ore pulp at the bottom of the thickener so as to stably discharge bottom flow; floc structures are destroyed by means of shearing force in the ore pulp circulation process, water contained in the floc structures is released, the concentration efficiency is improved, and the purpose of increasing pulp concentration is achieved finally.
Description
Technical field
The present invention relates to concentrator.
Background technology
Concentrator processes the solid-liquid separating equipment that ore pulp obtains high-concentration tailings in mining production, and concentrator is also widely used in industries such as metallurgy, material, papermaking.Mine tailing after concentrated is scraped bottom discharging well by harrow frame and discharges by tradition concentrator; harrow frame can play stable underflow and prevent the effect of blocking; but when bottom pulp density is too high, harrow frame running resistance can increase, cause motor autostop under extreme case and occur pressure rake accident.For this problem, researcher and relevant enterprise develop without rake Paste thickener, the inside of such concentrator does not have the dynamic structures such as harrow frame, the discharge of underflow is controlled by means of only bottom discharging pump, but not ideal enough without the control of rake Paste thickener to underflow, when adding flocculant, a part of free water is wrapped in flco inside after sedimentation by flco bottom concentrator, when flco is in compressional zone bottom concentrator, this part moisture cannot be discharged, and underflow density therefore can be caused on the low side.
Summary of the invention
For the problems referred to above, the present invention proposes the shearing thickening device be suitable for without rake Paste thickener, and utilize this device to carry out the method for enrichment to thickener underflow.
A kind of thickener underflow shears thickening device, it is characterized in that, a suction tube on concentrator cone base side is connected, a circle feed pipe is provided with around cone in the middle part of concentrator cone, feed pipe realizes being connected by circulating pump with suction tube after cone one is enclosed, feed pipe is provided with the material spray arm of the band valve of some symmetries, and material spray arm enters perpendicular to cone sidewall; Suction tube is provided with main valve successively, sewage draining valve, suction tube remove contamination back-flushing valve, back-flushing valve removed contamination by remove contamination back-flushing water inlet and feed pipe, and feed pipe is also provided with main valve.
The present invention utilizes said apparatus to carry out shearing the method for enrichment to thickener underflow and be:
The first step: open the main valve on suction tube, suction tube removes contamination back-flushing valve, main valve that feed pipe is removed contamination on back-flushing valve and feed pipe, closes sewage draining valve and back-flushing water inlet of removing contamination;
Second step: start circulating pump work, slip in cone enters suction tube, under circulating pump effect, make the part slip of concentrator cone base be transported in the feed pipe in the middle part of cone, the h cycle amount of slip needs to be determined by field experiment, be generally 1/8 ~ 1/10 of concentrator conical section volume, to be ejected into bottom concentrator in compressional zone by symmetrically arranged material spray arm again, the shearing force of high speed slip jet is utilized to make to form disturbance bottom concentrator, destroy flocculation structure, force the high concentration ground paste of bottom all the time in mixed on low speed state, the free water being wrapped in flco inside is discharged, the final object realizing raising pulp density,
Described circulating pump is variable frequency pump, running frequency 0 ~ 50Hz, regulates continuously in running according to the requirement of circulation slip flow.
3rd step: after concentrator is out of service, needs to rinse circulating line; Carry out according to following steps:
3.1st step: close suction tube and to remove contamination back-flushing valve, by removing contamination, back-flushing water inlet introduces back-flushing, and back-flushing enters feeding lines and rinses, and makes the remaining slip in feed pipe enter concentrator, closes feed arm valve and feed pipe valve after rinsing;
3.2nd step: back-flushing valve closing that feed pipe is removed contamination, open suction tube to remove contamination back-flushing valve, suction pipeline is rinsed, make the remaining slip in suction tube enter concentrator, close the main valve on suction tube after flushing, then open valve of removing contamination, ducted for suction residual clear water is discharged, then valve-off, suction tube are removed contamination back-flushing valve and back-flushing water inlet of removing contamination, thus prevent line clogging, restarting in order to system.
Good effect of the present invention is,
1, adopt ore pulp self-circulation mode to realize the mixing of ore pulp bottom concentrator, thus realize underflow stable emissions; Rely on the shearing force in ore pulp cyclic process to destroy flocculation structure, thus the water that its inside is comprised discharges, and improves thickening efficiency, final realization improves the object of pulp density simultaneously.
2, the present invention is not having under the dynamic structures such as harrow frame, by slip repeats itself, not only achieves the discharge of underflow high concentration, and decreases the consumption of electric energy.
3, utilize this technology, can transform traditional concentrator, thus overcome the shortcoming that its thickening efficiency is low, cannot run continuously.
4, under the condition that disposal ability is equal, drop into based on its floor space of novel concentrator of the present invention and construction and be only 50% and about 60% of traditional concentrator, there is obvious economic benefit.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment of the present invention;
Fig. 2 is the change of underflow density under different shear strength condition under laboratory condition.
Fig. 3 is the change of underflow density under different shear time.
In figure: 1-suction tube, 2-main valve, 3-material spray arm, 4-arm valve, 5-sewage draining valve, 6-suction tube is removed contamination back-flushing valve, and 7-removes contamination back-flushing water inlet, and 8-feed pipe is removed contamination back-flushing valve, 9-circulating pump, 10-main valve, 11-feed pipe.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described.
As shown in Figure 1, thickener underflow of the present invention shears thickening device, it is a suction tube 1 on concentrator cone base side is connected, in the middle part of concentrator cone, be provided with a circle feed pipe 11 around cone, and feed pipe 11 realizes being connected by circulating pump 9 with suction tube 1 after cone one is enclosed; Feed pipe 11 is provided with the material spray arm 3 of some symmetries, and with arm valve 4 on material spray arm 3, material spray arm 3 enters perpendicular to cone sidewall; Suction tube 1 is provided with main valve 2 successively, sewage draining valve 5, suction tube remove contamination back-flushing valve 6, back-flushing valve 8 removed contamination by remove contamination back-flushing water inlet 7 and feed pipe, and feed pipe 11 is also provided with main valve 10.
The present invention utilizes said apparatus to carry out shearing the method for enrichment to thickener underflow and be:
The first step: open the main valve 2 on suction tube 1, suction tube removes contamination back-flushing valve 6, back-flushing valve 8 removed contamination by feed pipe and main valve 10 on feed pipe 12, closes sewage draining valve 5 and back-flushing water inlet 7 of removing contamination;
Second step: start circulating pump 9 and work, slip in cone enters suction tube 1, under circulating pump 9 acts in the stuff-spraying pipe 11 making the part slurry pipeline transport of concentrator cone base in the middle part of cone, the h cycle amount of slip is 1/8 ~ 1/10 of concentrator conical section volume, to be ejected into bottom concentrator in compressional zone by symmetrically arranged material spray arm 3 again, the shearing force of high speed slip jet is utilized to make to form disturbance bottom concentrator, destroy flocculation structure, force the high concentration ground paste of bottom all the time in mixed on low speed state, the free water being wrapped in flco inside is discharged, the final object realizing raising pulp density,
Described circulating pump 9 is variable frequency pump, and running frequency 0 ~ 50Hz regulates continuously according to the requirement of circulation slip flow in running.
3rd step: after concentrator is out of service, needs to rinse circulating line; Carry out according to following steps:
3.1st step: close suction tube and to remove contamination back-flushing valve 6, by removing contamination, back-flushing water inlet 7 introduces back-flushing, back-flushing enters feed pipe 11 and rinses, and makes the remaining slip in feed pipe 11 enter concentrator, closes arm valve 4 and feed pipe valve 10 after rinsing;
3.2nd step: back-flushing valve 8 of being removed contamination by feed pipe is closed, open suction tube to remove contamination back-flushing valve 6, suction tube 1 is rinsed, make the remaining slip in suction tube 1 enter concentrator, close the main valve 2 on suction tube after flushing, then open valve 5 of removing contamination, residual clear water in suction tube 1 is discharged, then valve-off 5, suction tube are removed contamination back-flushing valve 6 and back-flushing water inlet 7 of removing contamination, thus prevent line clogging, restarting in order to system.
Fig. 2 is under laboratory condition, the situation of change of underflow density under different shear strength.As seen from Figure 2, by increasing circulation shear flow process, underflow density is significantly improved.When the frequency shearing circulating pump is when being increased to 35Hz by 20Hz, downward trend after underflow density presents and first rises, when the frequency shearing circulating pump is 30HZ, the amplitude that underflow density improves is maximum.
Fig. 3 is the impact of shear time on thickener underflow concentration, as seen from Figure 3, under the condition that shear strength keeps certain, along with the increase of shear time, underflow density raises gradually, and wherein, 30min underflow density raises very fast, and the amplitude that concentration then raises eases up gradually.
Result is known by experiment, and this technique significantly can improve underflow density.
Good effect of the present invention is further illustrated below by an embodiment.
Laiwu paddy man of mining industry Co., Ltd platform inclined shaft filling system adopts traditional batch pulping filling process, utilizes technology of the present invention, changes sand storehouse into concentrator and concentrate cyclone overflow, become full tail multi-stage PCE filling system.
System reform reprocessing rate about 120,000 tons/year, technological process is: hydrocyclone overflow (concentration 15%) flow to the concentrator of sand storehouse transformation certainly, two-tube self-circulation system is adopted bottom concentrator, the ore pulp of bottom utilizes circulating pump to squeeze into concentrator cone top, loop branch pipe adopts subtend 180 ° layout, and ore pulp internal circulating load is 55m
3/ h.After concentrated through two sections, underflow density brings up to about 55% by initial 15%, and concentrator overflow suspension content is less than 500mg/L, can return and select factory to recycle.Concentrator concentrates underflow and sand setting merges the Total tailing obtaining concentration more than 65%; The filling slurry prepared after adding the solid powder of glue of 15%-20% is for underground filling, and obturation 28d intensity reaches more than 1.5Mpa.
Claims (2)
1. a thickener underflow shears thickening device, it is characterized in that, a suction tube on concentrator cone base side is connected, a circle feed pipe is provided with around cone in the middle part of concentrator cone, feed pipe realizes being connected by circulating pump with suction tube after cone one is enclosed, feed pipe is provided with the material spray arm of the band valve of some symmetries, and material spray arm enters perpendicular to cone sidewall; Suction tube is provided with main valve successively, sewage draining valve, suction tube remove contamination back-flushing valve, back-flushing valve removed contamination by remove contamination back-flushing water inlet and feed pipe, and feed pipe is also provided with main valve.
2. utilize the device described in claim 1 to carry out shearing a method for enrichment to thickener underflow, it is characterized in that,
The first step: open the main valve on suction tube, suction tube removes contamination back-flushing valve, main valve that feed pipe is removed contamination on back-flushing valve and feed pipe, closes sewage draining valve and back-flushing water inlet of removing contamination;
Second step: start circulating pump work, slip in cone enters suction tube, under circulating pump effect, make the part slip of concentrator cone base be transported in the feed pipe in the middle part of cone, the h cycle amount of slip is 1/8 ~ 1/10 of concentrator conical section volume, to be ejected into bottom concentrator in compressional zone by symmetrically arranged material spray arm again, the shearing force of high speed slip jet is utilized to make to form disturbance bottom concentrator, destroy flocculation structure, force the high concentration ground paste of bottom all the time in mixed on low speed state, the free water being wrapped in flco inside is discharged, the final object realizing raising pulp density,
Described circulating pump is variable frequency pump, running frequency 0 ~ 50Hz, regulates continuously in running according to the requirement of circulation slip flow.
3rd step: after concentrator is out of service, needs to rinse circulating line; Carry out according to following steps:
3.1st step: close suction tube and to remove contamination back-flushing valve, by removing contamination, back-flushing water inlet introduces back-flushing, and back-flushing enters feeding lines and rinses, and makes the remaining slip in feed pipe enter concentrator, closes feed arm valve and feed pipe valve after rinsing;
3.2nd step: back-flushing valve closing that feed pipe is removed contamination, open suction tube to remove contamination back-flushing valve, suction pipeline is rinsed, make the remaining slip in suction tube enter concentrator, close the main valve on suction tube after flushing, then open valve of removing contamination, ducted for suction residual clear water is discharged, then valve-off, suction tube are removed contamination back-flushing valve and back-flushing water inlet of removing contamination, thus prevent line clogging, restarting in order to system.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510613694.0A CN105148574B (en) | 2015-09-23 | 2015-09-23 | Thickener underflow shears thickening device and thickening method |
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| CN201510613694.0A CN105148574B (en) | 2015-09-23 | 2015-09-23 | Thickener underflow shears thickening device and thickening method |
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| CN105148574A true CN105148574A (en) | 2015-12-16 |
| CN105148574B CN105148574B (en) | 2016-10-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107754396A (en) * | 2017-11-21 | 2018-03-06 | 飞翼股份有限公司 | A kind of thickener underflow system |
| CN109821279A (en) * | 2019-02-18 | 2019-05-31 | 上海申欣环保实业有限公司 | Gypsum slurries concentrated separation system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3700725A1 (en) * | 1987-01-13 | 1988-07-21 | Schauenburg Masch | Process and plant for purifying untreated waste water bearing fine sludge |
| CN101468262A (en) * | 2007-12-25 | 2009-07-01 | 中国恩菲工程技术有限公司 | Deep wimble thickener |
| CN201415072Y (en) * | 2009-02-17 | 2010-03-03 | 云南大红山管道有限公司 | Pulp thickening system capable of increasing pulp density |
| CN205007659U (en) * | 2015-09-23 | 2016-02-03 | 山东科技大学 | Densification device is cuted to thickener underflow |
-
2015
- 2015-09-23 CN CN201510613694.0A patent/CN105148574B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3700725A1 (en) * | 1987-01-13 | 1988-07-21 | Schauenburg Masch | Process and plant for purifying untreated waste water bearing fine sludge |
| CN101468262A (en) * | 2007-12-25 | 2009-07-01 | 中国恩菲工程技术有限公司 | Deep wimble thickener |
| CN201415072Y (en) * | 2009-02-17 | 2010-03-03 | 云南大红山管道有限公司 | Pulp thickening system capable of increasing pulp density |
| CN205007659U (en) * | 2015-09-23 | 2016-02-03 | 山东科技大学 | Densification device is cuted to thickener underflow |
Non-Patent Citations (1)
| Title |
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| 吕宪俊，连民杰: "金属矿山尾矿处理技术进展", 《金属矿山》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107754396A (en) * | 2017-11-21 | 2018-03-06 | 飞翼股份有限公司 | A kind of thickener underflow system |
| CN109821279A (en) * | 2019-02-18 | 2019-05-31 | 上海申欣环保实业有限公司 | Gypsum slurries concentrated separation system |
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| Publication number | Publication date |
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| CN105148574B (en) | 2016-10-05 |
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