CN101845818A - Method and device for building dam by mixing red mud and ash - Google Patents
Method and device for building dam by mixing red mud and ash Download PDFInfo
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- CN101845818A CN101845818A CN201010206239A CN201010206239A CN101845818A CN 101845818 A CN101845818 A CN 101845818A CN 201010206239 A CN201010206239 A CN 201010206239A CN 201010206239 A CN201010206239 A CN 201010206239A CN 101845818 A CN101845818 A CN 101845818A
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- red mud
- dam
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- filter cake
- lime
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention discloses a method and a device for building a dam by mixing red mud and ash. The method comprises the following steps: firstly, building an initial dam (12) from earth and rockfill on the stock-dump damsite; secondly, stirring and mixing red mud slurry and ash slurry by a stirrer (2) in a slurry tank (1), feeding the mixture to a filter press (7) by a feed pump (6), and getting the mixed filter cake close to the initial dam (12) by a belt conveyor (11); thirdly, dividing the area of a subdam to be built in the vicinity of the initial dam (12) into a plurality of sections, and sequentially unloading, flattening and airing the mixed filter cake at each section after the arrival of the mixed filter cake; fourthly, compacting the filter cake by a compactor, and rearranging a second layer of mixed filter cake at each section and repeating the steps to finish building a primary subdam (15); and fifthly, arranging the mixed filter cake in the bank of the built primary subdam (15), and flattening and compacting by an earthmover (13) until the bank is full. Building a secondary subdam and a tertiary subdam by using the same method, and piling up the filter cake until the stock pump reaches the altitude according to the design.
Description
Technical field
The present invention relates to a kind of method and device of red mud lime-ash building dam by mixing, belong to the solid waste disposal technical field in the alumina producing.
Background technology
Alumina enterprise generally sets up steam power plant provides manufacturing process needed steam, and the waste residue of discharging in the alumina producing is a red mud, and the waste residue of discharging during steam power plant produces is a lime-ash.1 ton of product of the general every production of alumina producer is discharged 1.0～1.4 tons of red muds, and steam power plant's lime-ash discharge value accounts for 30～50% of coal consumption by the ature of coal difference.The red mud granularity is generally thinner, belongs to the silty clay class.Lime-ash fineness ratio red mud is thick slightly, belongs to the flour sand class.
Steam power plant's disposal of ash and slag mode is developing direction with the comprehensive utilization, and dry ash can be used as build the road roadbed and cement admixture.But in fact because condition restriction, part enterprise fails to fully utilize fully, still has the lime-ash of significant proportion need deliver to the lime-ash stockyard and deposits.Lime-ash is subjected to rainwater to soak grey pulp water that the back produces because index exceeding standards such as pH values, the interception of need taking to build a dam, carries out measure such as antiseep processing, invests often more than up to ten million units.The lime-ash stockyard is divided into two kinds of wet method and dry method, and the water/binder ratio that wet method is stored up is more than 10:1, and water is clarified back about 80% and returned steam power plant in the stockyard.It is with automobile the lime-ash of moisture content about 20% to be delivered to the lime-ash stockyard that dry method is stored up, during except that rainfall the stockyard generally do not have ponding.
Red mud for alumina plant can be partly as the cement admixture except that red mud from sintering process, and Bayer process red mud and most of red mud from sintering process all need be delivered to red mud dump and store up.Wherein carry moisture content storing up for wet method more than 75%～85%, the storing up for semidry method of moisture content 41%～47%.Moisture content is less than 35% store up for dry method.
Present alumina producer generally builds relatively independent red mud dump and the lime-ash stockyard is stored up red mud and lime-ash respectively.Storing up scheme has several.As Guangxi Hua Yin Chinalco, red mud adopts semidry method to store up, and lime-ash adopts automobile transportation dry method to store up, with the disposable storehouse of building of native stone material.The cost of transportation of lime-ash and the construction cost in stockyard are higher.As middle aluminium Guizhou branch company, red mud and lime-ash all adopt wet method to store up respectively, and the construction cost in stockyard is higher, has the risk of attached liquid leakage pollution environment.As middle aluminium Company Shanxi Branch, store up though red mud and lime-ash are entered in the different subregions in same seat stockyard, but still adopt the wet method discharging modes, the dam material of fill dam relies on red mud from sintering process, in case the sintering process flow process is because of the cost factor reduce or stop production, the stockyard will face the difficulty of dam material deficiency.
Have following shortcoming in the traditional disposal red mud and the technology of lime-ash: red mud and lime-ash are stored up respectively, invest bigger; Wet method is stored up arts demand and is built a dam with native stone or red mud from sintering process, has limitation on dam material is selected; Dry method is stored up and is adopted automobile transportation lime-ash in the technology, and cost of transportation is higher.
On the other hand, red mud (comprising pure Bayer process red mud) and lime-ash are under the low-water-content condition, has certain mechanical property, especially after the red mud lime-ash evenly mixes, the grain composition of red mud can improve, and can obtain better mechanical property after compacting, how to utilize this characteristic of red mud and lime-ash, the disposal costs of red mud and lime-ash in the saving alumina producing becomes the technical problem that must solve.
Summary of the invention
The technical problem to be solved in the present invention is, a kind of method and device of red mud lime-ash building dam by mixing are provided, can save the expense of building a dam and lime-ash freight, the moisture of guaranteeing to enter the stockyard simultaneously is less, reduce the influence of red mud and disposal of ash and slag, to overcome the deficiency that prior art exists to environment.
In order to solve described technical problem, method of the present invention is taked following technical scheme: it comprises following process: the first, construct initial dam high about 2m with native stone material earlier at stockyard dam site place; The second, will from the red mud of plant area slurry and lime-ash starch in slurry tank fully mix with mixer after, send mixture slurry to filter press with feeding pump and carry out press filtration, the blending filter cake after the press filtration is sent near the initial dam in stockyard with rubber conveyer; The 3rd, to wait near the initial dam that the zone of building sub-dam is divided into plurality of sections, elder generation was first section discharging after blending filter cake arrived the stockyard, push away flat then with bulldozer, when thickness reached 0.5m, first section entered the airing phase, and rubber conveyer changes second section discharging over to, change the 3rd section discharging when second section thickness reaches 0.5m over to, the rest may be inferred for follow-up section; The 4th, when the moisture content of first section blending filter cake drops to 38%～42%, roll with compacting machine, when reaching 95%, its degree of compaction finishes rolling operation when above, again on first section, lay second layer blending filter cake, repeat said process at each section and promptly finish constructing of the sub-dam of one-level; The 5th, in constructing the storage capacity that the sub-dam of one-level obtained, continue to lay blending filter cake and shakeout and roll with bulldozer, after the sub-dam of one-level piles with, use the same method and construct secondary, three grades of sub-dams, continue to store up blending filter cake, reach final design altitude up to the stockyard.
The filtrate that produces in pressure-filtering process is collected with filtrate receiver, returns plant area's technological process with return pipe and reuse after the filtrate pump pressurization.
In order to solve described technical problem, device of the present invention is taked following technical scheme: at slurry tank next door configuration feeding pump and filter press, feeding pump is connected with the outlet of slurry tank and the import of filter press respectively by pipeline; At filter press next door configuration filtrate receiver and filtrate pump, filtrate receiver is connected with the filtrate (liquid of filter press and the import of filtrate pump respectively by pipeline; The filtrate delivery side of pump takes back water pipe; Connect rubber conveyer under the cake of filter-press dump skip, the terminal point of rubber conveyer inserts in the stockyard; Bulldozer, compacting machine are arranged in the stockyard.
The capacity of slurry tank satisfies the flow that red mud is starched and lime-ash is starched of depositing 4～6 hours.
The capacity of filtrate receiver satisfies deposits 2～3 hours amount of filtrate.
Mixer is installed in the slurry tank.
Slurry tank connects red mud carrier pipe a, red mud carrier pipe b and lime-ash carrier pipe.
To insert slurry tank from the red mud slurry of plant area with red mud carrier pipe a and red mud carrier pipe b, for the factory that produces alumina with combination method, red mud carrier pipe a and red mud carrier pipe b carry Bayer process red mud slurry and red mud from sintering process slurry respectively, for the factory with pure producing aluminium oxide by bayer, red mud carrier pipe a and red mud carrier pipe b carry the Bayer process red mud slurry simultaneously.To insert slurry tank from the lime-ash slurry of plant area with the lime-ash carrier pipe.
Compared with prior art, the method and the device of red mud lime-ash building dam by mixing provided by the invention, both be applicable to the alumina producer of combination method technology, also be applicable to the alumina producer of pure bayer process, red mud and lime-ash have been realized in same stockyard, storing up simultaneously, and the red mud lime-ash as main dam material, will be built a dam and be stored up in same flow process and finish, and dam material no longer relies on native stone and red mud from sintering process.Near with wet method red mud and lime-ash being transported to the stockyard from plant area, blending filter cake is transported in the stockyard, has saved the freight of red mud and lime-ash,, reduced the influence of red mud and disposal of ash and slag environment simultaneously with attached liquid filtering outside the stockyard with rubber conveyer.
Description of drawings
Fig. 1 is a generalized section of the present invention.
The specific embodiment
Embodiments of the invention: as shown in Figure 1, build slurry tank 1 near the stockyard, its capacity satisfies the flow that red mud is starched and lime-ash is starched of depositing 4～6 hours.Mixer 2 is installed in the slurry tank 1.Slurry tank 1 connects red mud carrier pipe a3, red mud carrier pipe b4 and lime-ash carrier pipe 5.
To insert slurry tank 1 from the red mud slurry of plant area with red mud carrier pipe a3 and red mud carrier pipe b4, for the factory that produces alumina with combination method, red mud carrier pipe a3 and red mud carrier pipe b4 carry Bayer process red mud slurry and red mud from sintering process slurry respectively, for the factory with pure producing aluminium oxide by bayer, red mud carrier pipe a3 and red mud carrier pipe b4 carry the Bayer process red mud slurry simultaneously.To insert slurry tank 1 from the lime-ash slurry of plant area with lime-ash carrier pipe 5.
At slurry tank 1 next door configuration feeding pump 6 and filter press 7, feeding pump 6 is connected with the outlet of slurry tank 1 and the import of filter press 7 respectively by pipeline.At filter press 7 next doors configuration filtrate receiver 8 and filtrate pump 9, filtrate receiver 8 is connected with the filtrate (liquid of filter press 7 and the import of filtrate pump 9 respectively by pipeline.The outlet of filtrate pump 9 takes back water pipe 10.The capacity of filtrate receiver 8 satisfies deposits 2～3 hours amount of filtrate.
Connect rubber conveyer 11 under the filter cake dump skip of filter press 7, the terminal point of rubber conveyer 11 inserts in the stockyard.
Earlier construct initial dam high about 2m 12 at stockyard dam site place with native stone material.Begin then to build a dam: will in slurry tank 1, fully mix from the red mud slurry and the lime-ash slurry of plant area with mixer 2 with red mud lime-ash mixed material, send mixture slurry to filter press 7 with feeding pump 6 then and carry out press filtration, the blending filter cake after the press filtration is sent near the initial dam 12 in stockyard with rubber conveyer 11.Wait near the initial dam 12 that the zone of building sub-dam is divided into plurality of sections, elder generation was first section discharging after blending filter cake arrived the stockyard, push away flat with bulldozer 13 then, when thickness reaches 0.5m, first section enters the airing phase, rubber conveyer 11 changes second section discharging over to, changes the 3rd section discharging when second section thickness reaches 0.5m over to, and the rest may be inferred for follow-up section.When the moisture content of first section blending filter cake drops to 38%～42%, roll with compacting machine 14, finish rolling operation when its degree of compaction reaches 95% when above, on first section, lay second layer blending filter cake again, repeat said process at each section and just can finish constructing of the sub-dam 15 of one-level.In constructing the storage capacity that the sub-dam 15 of one-level obtained, continue to lay blending filter cake then and shakeout and roll with bulldozer 13, after the sub-dam 15 of one-level piles with, use the same method and construct secondary, three grades of sub-dams 15 continue to store up blending filter cake, reach final design altitude up to the stockyard.
The filtrate that produces in pressure-filtering process is collected with filtrate receiver 8, returns plant area's technological process with return pipe 10 and reuse after filtrate pump 9 pressurizations.
Claims (7)
1. the method for a red mud lime-ash building dam by mixing, it is characterized in that: it comprises following process: the first, construct initial dam (12) with native stone material earlier at stockyard dam site place; Second, will from the red mud of plant area slurry and lime-ash starch in slurry tank (1) fully mix with mixer (2) after, send mixture slurry to filter press (7) with feeding pump (6) and carry out press filtration, the blending filter cake after the press filtration is sent near the initial dam (12) in stockyard with rubber conveyer (11); The 3rd, to wait near the initial dam (12) that the zone of building sub-dam is divided into plurality of sections, elder generation was first section discharging after blending filter cake arrived the stockyard, use bulldozer (13) to push away flat then, when thickness reached 0.5m, first section entered the airing phase, and rubber conveyer (11) changes second section discharging over to, change the 3rd section discharging when second section thickness reaches 0.5m over to, the rest may be inferred for follow-up section; The 4th, when the moisture content of first section blending filter cake drops to 38%～42%, roll with compacting machine (14), when reaching 95%, its degree of compaction finishes rolling operation when above, again on first section, lay second layer blending filter cake, repeat said process at each section and promptly finish constructing of one-level sub-dam (15); The 5th, in constructing the storage capacity that the sub-dam of one-level (15) obtained, continue to lay blending filter cake and shakeout and roll with bulldozer (13), after the sub-dam of one-level (15) piles with, use the same method and construct secondary, three grades of sub-dams, continue to store up blending filter cake, reach final design altitude up to the stockyard.
2. the method for red mud lime-ash building dam by mixing according to claim 1 is characterized in that: the filtrate that produces in pressure-filtering process is collected with filtrate receiver (8), returns plant area's technological process with return pipe (10) and reuse after filtrate pump (9) pressurization.
3. device that is used for red mud lime-ash building dam by mixing as claimed in claim 1, it is characterized in that: at slurry tank (1) next door configuration feeding pump (6) and filter press (7), feeding pump (6) is connected with the outlet of slurry tank (1) and the import of filter press (7) respectively by pipeline; At filter press (7) next door configuration filtrate receiver (8) and filtrate pump (9), filtrate receiver (8) is connected with the filtrate (liquid of filter press (7) and the import of filtrate pump (9) respectively by pipeline; The outlet of filtrate pump (9) takes back water pipe (10); Connect rubber conveyer (11) under the filter cake dump skip of filter press (7), the terminal point of rubber conveyer (11) inserts in the stockyard; Bulldozer (13), compacting machine (14) are arranged in the stockyard.
4. the device that is used for red mud lime-ash building dam by mixing according to claim 3 is characterized in that: the capacity of slurry tank (1) satisfies the flow that red mud is starched and lime-ash is starched of depositing 4～6 hours.
5. the device that is used for red mud lime-ash building dam by mixing according to claim 3 is characterized in that: the capacity of filtrate receiver (8) satisfies deposits 2～3 hours amount of filtrate.
6. the device that is used for red mud lime-ash building dam by mixing according to claim 3 is characterized in that: mixer (2) is installed in the slurry tank (1).
7. the device that is used for red mud lime-ash building dam by mixing according to claim 3 is characterized in that: slurry tank (1) connects red mud carrier pipe a(3), red mud carrier pipe b(4) and lime-ash carrier pipe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010206239.6A CN101845818B (en) | 2010-06-23 | 2010-06-23 | Method and device for building dam by mixing red mud and ash |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010206239.6A CN101845818B (en) | 2010-06-23 | 2010-06-23 | Method and device for building dam by mixing red mud and ash |
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| Publication Number | Publication Date |
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| CN101845818A true CN101845818A (en) | 2010-09-29 |
| CN101845818B CN101845818B (en) | 2014-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010206239.6A Active CN101845818B (en) | 2010-06-23 | 2010-06-23 | Method and device for building dam by mixing red mud and ash |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102952909A (en) * | 2012-11-07 | 2013-03-06 | 中国恩菲工程技术有限公司 | Smelting slag damming method |
| CN105728424A (en) * | 2015-11-26 | 2016-07-06 | 张强 | Ring landfill dam construction device and method for solid waste solidification storage |
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| JPS641964A (en) * | 1987-06-24 | 1989-01-06 | Omron Tateisi Electron Co | Length and speed measuring apparatus |
| JPH0641964A (en) * | 1992-07-27 | 1994-02-15 | Fujita Corp | Light weighted banking method using burned ash |
| CN1837108A (en) * | 2005-03-23 | 2006-09-27 | 贵阳铝镁设计研究院 | Process for dry treatment of red mud and clinker in alumina plant |
| CN2848338Y (en) * | 2005-12-19 | 2006-12-20 | 贵阳铝镁设计研究院 | Red mud cleaning device |
| CN201730100U (en) * | 2010-06-23 | 2011-02-02 | 贵阳铝镁设计研究院 | Damming device for mixing red mud with slag |
-
2010
- 2010-06-23 CN CN201010206239.6A patent/CN101845818B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS641964A (en) * | 1987-06-24 | 1989-01-06 | Omron Tateisi Electron Co | Length and speed measuring apparatus |
| JPH0641964A (en) * | 1992-07-27 | 1994-02-15 | Fujita Corp | Light weighted banking method using burned ash |
| CN1837108A (en) * | 2005-03-23 | 2006-09-27 | 贵阳铝镁设计研究院 | Process for dry treatment of red mud and clinker in alumina plant |
| CN2848338Y (en) * | 2005-12-19 | 2006-12-20 | 贵阳铝镁设计研究院 | Red mud cleaning device |
| CN201730100U (en) * | 2010-06-23 | 2011-02-02 | 贵阳铝镁设计研究院 | Damming device for mixing red mud with slag |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102952909A (en) * | 2012-11-07 | 2013-03-06 | 中国恩菲工程技术有限公司 | Smelting slag damming method |
| CN102952909B (en) * | 2012-11-07 | 2015-03-18 | 中国恩菲工程技术有限公司 | Smelting slag damming method |
| CN105728424A (en) * | 2015-11-26 | 2016-07-06 | 张强 | Ring landfill dam construction device and method for solid waste solidification storage |
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| CN101845818B (en) | 2014-10-08 |
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