CN204873870U - Bayer process red mud washing system in aluminium oxide production process - Google Patents
Bayer process red mud washing system in aluminium oxide production process Download PDFInfo
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- CN204873870U CN204873870U CN201520475934.0U CN201520475934U CN204873870U CN 204873870 U CN204873870 U CN 204873870U CN 201520475934 U CN201520475934 U CN 201520475934U CN 204873870 U CN204873870 U CN 204873870U
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Abstract
This application embodiment provides a bayer process red mud washing system in aluminium oxide production process, includes: connect the vacuum filter that turns over to dissolving out the device that dissolves out that the red mud lotion goes on diluting for the ore pulp, the vacuum filter that turns over washs and turns and unload the filtering table of mud low concentration separation underflow including adding water. This application has improved the rate of dissolving out of aluminium oxide, has reduced the manufacturing cost of aluminium oxide, need not add the flocculating agent and subside.
Description
Technical field
The embodiment of the present application relates to aluminum oxide technology field, the Bayer process red mud washing system particularly in a kind of aluminum oxide production process.
Background technology
In alumina producing, Bayer process is a kind of production method mainly taked now, its operation comprises: raw material, stripping, sedimentation, decomposition, evaporation, roasting, and be that the subsider of employing is to carry out the solid-liquor separation of red mud now substantially in sedimentation operation, subsider is also a highly stable liquid-solid separation equipment, but the time of its separating, washing is oversize, probably at 120 hours.Aluminum oxide Yin Wendu in separating, washing process in thick liquid reduces, concentration reduces generation hydrolysis reaction, makes aluminum oxide output reduce 2 ~ 3% in sedimentation operation
Particularly, the sedimentation operation of existing Bayer process is made up of 6 subsiders, first dissolved mineral slurry carries out solid-liquor separation (title separator tank) through 1 subsider, thick liquid part enters next operation, red mud and the thick liquid of a part are got to next subsider by the underflow of separator tank and are carried out washing (title rinse bath), need altogether to carry out 4 washings, the attached liquid alkali in red mud just can be made to reach qualified index.Stripping slurry in residence time of separator tank probably at 4-7 hour, in residence time of rinse bath probably at 100 ~ 120 hours, during this period of time due to will water washing be added, aluminum oxide in thick liquid is caused concentration to reduce by dilution, the temperature of the whole slip of prolongation in time reduces, producing hydrolysis reaction causes the aluminum oxide in liquid to carry out red mud, causes the reduction of solubility rate, causes the rising of the various unit consumption of alumina producing.
Therefore, need a kind of alumina producing scheme improving digesting efficiency of alumina in prior art badly and solve the problems referred to above.
Utility model content
The embodiment of the present application provides the Bayer process red mud washing system in a kind of aluminum oxide production process, which raises the solubility rate of aluminum oxide, reduces the production cost of aluminum oxide, does not need to add flocculation agent and carries out sedimentation.
For realizing above-mentioned utility model object, on the one hand, the embodiment of the present application provides:
The application also provides the washing system of the Bayer process red mud in a kind of aluminum oxide production process, comprising:
Connect tilting-pan vacuum filter to the dissolved mineral slurry dissolving device that red mud wash liquor dilutes, described tilting-pan vacuum filter comprises adding water and washs and stir to lower concentration separating underflow the filtering table carrying out dump.
Further, described tilting-pan vacuum filter one is total is greater than or equal to 24 pieces of filtering tables.
Further, described dissolving device comprises: generation unit, carries out stripping for receiving qualified ore pulp; Dilution unit, for diluting the ore pulp of stripping through red mud wash liquor.
Further, described tilting-pan vacuum filter comprises: filtering table, distributor head, material scraping plate, frame, rinse filter cloth pipe, slurry agitating device, stir transmission mechanism, main transmission gear, described filtering table is circularly be arranged in described frame, described distributor head is arranged on the central authorities of described filtering table, described material scraping plate is arranged in described frame and contacts with described filtering table, described flushing filter cloth pipe is arranged in described frame and rinses described filtering table, described slurry agitating device and described stirring transmission mechanism are arranged in frame, under described stirring transmission mechanism drives, slurries are stirred, main transmission gear is arranged in frame, transmission control is carried out to whole tilting-pan vacuum filter.
Bayer process red mud washing system in the aluminum oxide production process that the embodiment of the present application provides, dissolving device, for being sent in stripping operation by qualified ore pulp, dissolved mineral slurry red mud wash liquor dilutes; Tilting-pan vacuum filter, for receiving the dissolved mineral slurry after dilution, dilute with water separating underflow; Lower concentration separating underflow after dilution enters filtering table, and the filtering table that adds water washs; Stir filtering table and carry out dump, complete Bayer process red mud washing.Within the washing time of Bayer red mud can be shortened to 10min by the application, reduce in washing process because concentration reduction, temperature reduce the hydrolysis reaction occurred.The application makes solubility rate improve about 2%, is equivalent to original fecund 26.7kg when often producing 1 ton of aluminum oxide.When using tilting-pan vacuum filter to carry out Bayer red mud washing, do not need to add flocculation agent and carry out sedimentation, the flocculation agent of 1/3-1/2 of positive usual amounts saved by general 1 ton of aluminum oxide, reduces the production cost of aluminum oxide.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schema of the Bayer process red mud washing methods in the embodiment of the present application aluminum oxide production process;
Fig. 2 is the structural representation of the Bayer process red mud washing system in the embodiment of the present application aluminum oxide production process;
Fig. 3 is the structural representation of the dissolving device in the Bayer process red mud washing system in the embodiment of the present application aluminum oxide production process;
Fig. 4 is the structural representation of the tilting-pan vacuum filter in the Bayer process red mud washing system in the embodiment of the present application aluminum oxide production process.
Embodiment
For making the object of the embodiment of the present application, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
Embodiment one
Referring to Fig. 1, the application provides the washing methods of the Bayer process red mud in a kind of aluminum oxide production process, comprising:
S1, sent in stripping operation by qualified ore pulp, dissolved mineral slurry red mud wash liquor dilutes.
Particularly, ore is put into raw material grinding mill, add qualified mother liquor and carry out grinding the qualified ore pulp of rear formation, qualified ore pulp is sent in stripping operation and carries out stripping.
The ore pulp process red mud wash liquor of stripping dilutes, thus enters separation circuit.
Dissolved mineral slurry after S2, dilution is transported to tilting-pan vacuum filter, dilute with water separating underflow.
Tilting-pan vacuum filter is the filter plant that a kind of pressure vacuumizes, and the dissolved mineral slurry after being diluted by red mud wash liquor is transported to tilting-pan vacuum filter, needs thin up separating underflow.
Particularly, often to come the thick liquid of 1 ton of dry red mud with 1.5t from separating underflow, at this moment the Nk (concentration of effective Na2O) of thick liquid is higher, large about about 160g/l, now first the wash water adding 1 ton in separating underflow, Nk concentration being dropped to Nk=80 ~ 130g/l, reducing Nk concentration mainly in order to increase the time that the filter cloth that turns over uses.
Lower concentration separating underflow after S3, dilution enters filtering table, and the filtering table that adds water washs.
Lower concentration separating underflow after dilution enters revolving-leaf type filter and carries out solid-liquor separation, also has the moisture of 1 ton to join on filtering table for 2 ~ 4 times and washs.Particularly, the number of times carrying out washing described in is 2---3 times.
S4, stir filtering table and carry out dump, complete Bayer process red mud washing.
Particularly, described tilting-pan vacuum filter one is total is greater than or equal to 24 pieces of filtering tables.Described step S4 comprises:
20 piece of filtering table has washed, and stirs filtering table and starts dump, completes Bayer process red mud washing.
Rinse regeneration with water after 21 piece and above filtering table dump, enter next filtration cycle.
The application's tilting-pan vacuum filter is the filter plant that a kind of pressure vacuumizes, and within the washing time of Bayer red mud can being shortened to 10min, reduces in washing process because concentration reduction, temperature reduce the hydrolysis reaction occurred.The application makes solubility rate improve about 2%, is equivalent to original fecund 26.7kg when often producing 1 ton of aluminum oxide.When using tilting-pan vacuum filter to carry out Bayer red mud washing, do not need to add flocculation agent and carry out sedimentation, the flocculation agent of 1/3-1/2 of positive usual amounts saved by general 1 ton of aluminum oxide, reduces the production cost of aluminum oxide.
Embodiment two
Referring to Fig. 2, the application also provides the washing system of the Bayer process red mud in a kind of aluminum oxide production process, comprising:
Dissolving device 1, for being sent in stripping operation by qualified ore pulp, dissolved mineral slurry red mud wash liquor dilutes.
Tilting-pan vacuum filter 2, for receiving the dissolved mineral slurry after dilution, dilute with water separating underflow; Lower concentration separating underflow after dilution enters filtering table, and the filtering table that adds water washs; Stir filtering table and carry out dump, complete Bayer process red mud washing.
Particularly, referring to Fig. 3, dissolving device 1 comprises: generation unit 11, carries out stripping for receiving qualified ore pulp; Dilution unit 12, for diluting the ore pulp of stripping through red mud wash liquor.
The ore pulp process red mud wash liquor of stripping dilutes, thus enters separation circuit.
Tilting-pan vacuum filter 2 is filter plants that a kind of pressure vacuumizes, and the dissolved mineral slurry after being diluted by red mud wash liquor is transported to tilting-pan vacuum filter, needs thin up separating underflow.
In the application one specific implementation, referring to Fig. 4, described tilting-pan vacuum filter 2 comprises: filtering table 21, distributor head 22, material scraping plate 23, frame 24, flushing filter cloth pipe 25, slurry agitating device 26, stirring transmission mechanism 27, main transmission gear 28.Described filtering table 21 is arranged in described frame 24 in circular, described distributor head 22 is arranged on the central authorities of described filtering table 21, described material scraping plate 23 is arranged in described frame 24 and contacts with described filtering table 21, described flushing filter cloth pipe 25 is arranged in described frame 24 and rinses described filtering table 21, described slurry agitating device 26 and described stirring transmission mechanism 27 are arranged in frame, under described stirring transmission mechanism 27 drives, slurries are stirred, main transmission gear 28 is arranged in frame, carries out transmission control to whole tilting-pan vacuum filter 2.
Particularly, often to come the thick liquid of 1 ton of dry red mud with 1.5t from separating underflow, at this moment the Nk (concentration of effective Na2O) of thick liquid is higher, large about about 160g/l, now first the wash water adding 1 ton in separating underflow, Nk concentration being dropped to Nk=80 ~ 130g/l, reducing Nk concentration mainly in order to increase the time that the filter cloth that turns over uses.
Lower concentration separating underflow after dilution enters revolving-leaf type filter and carries out solid-liquor separation, also has the moisture of 1 ton to join on filtering table for 2 ~ 4 times and washs.Particularly, the number of times carrying out washing described in is 2---3 times.
Particularly, described tilting-pan vacuum filter one is total is greater than or equal to 24 pieces of filtering tables.Described tilting-pan vacuum filter 2 the 20 piece of filtering table has washed, and stirs filtering table and starts dump, completes Bayer process red mud washing.Rinse regeneration with water after 21 piece and above filtering table dump, enter next filtration cycle.
The application's tilting-pan vacuum filter is the filter plant that a kind of pressure vacuumizes, and within the washing time of Bayer red mud can being shortened to 10min, reduces in washing process because concentration reduction, temperature reduce the hydrolysis reaction occurred.The application makes solubility rate improve about 2%, is equivalent to original fecund 26.7kg when often producing 1 ton of aluminum oxide.When using tilting-pan vacuum filter to carry out Bayer red mud washing, do not need to add flocculation agent and carry out sedimentation, the flocculation agent of 1/3-1/2 of positive usual amounts saved by general 1 ton of aluminum oxide, reduces the production cost of aluminum oxide.
Device embodiment described above is only schematic, the wherein said unit illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple NE.Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.Those of ordinary skill in the art, when not paying performing creative labour, are namely appreciated that and implement.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that each embodiment can add required general hardware platform by software and realize, and can certainly pass through hardware.Based on such understanding, technique scheme can embody with the form of software product the part that prior art contributes in essence in other words, this computer software product can store in a computer-readable storage medium, as ROM/RAM, magnetic disc, CD etc., comprising some instructions in order to make a computer equipment (can be Personal Computer, server, or the network equipment etc.) perform the method described in some part of each embodiment or embodiment.
Last it is noted that above embodiment is only in order to illustrate the technical scheme of the application, be not intended to limit; Although with reference to previous embodiment to present application has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the application.
Claims (4)
1. the Bayer process red mud washing system in aluminum oxide production process, is characterized in that, comprising:
Connect tilting-pan vacuum filter to the dissolved mineral slurry dissolving device that red mud wash liquor dilutes, described tilting-pan vacuum filter comprises adding water and washs and stir to lower concentration separating underflow the filtering table carrying out dump.
2. system according to claim 1, is characterized in that, described tilting-pan vacuum filter one is total is greater than or equal to 24 pieces of filtering tables.
3. system according to claim 1, is characterized in that, described dissolving device comprises: generation unit, carries out stripping for receiving qualified ore pulp; Dilution unit, for diluting the ore pulp of stripping through red mud wash liquor.
4. system according to claim 1, it is characterized in that, described tilting-pan vacuum filter comprises: filtering table, distributor head, material scraping plate, frame, rinse filter cloth pipe, slurry agitating device, stir transmission mechanism, main transmission gear, described filtering table is circularly be arranged in described frame, described distributor head is arranged on the central authorities of described filtering table, described material scraping plate is arranged in described frame and contacts with described filtering table, described flushing filter cloth pipe is arranged in described frame and rinses described filtering table, described slurry agitating device and described stirring transmission mechanism are arranged in frame, under described stirring transmission mechanism drives, slurries are stirred, main transmission gear is arranged in frame, transmission control is carried out to whole tilting-pan vacuum filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520475934.0U CN204873870U (en) | 2015-07-03 | 2015-07-03 | Bayer process red mud washing system in aluminium oxide production process |
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| CN201520475934.0U CN204873870U (en) | 2015-07-03 | 2015-07-03 | Bayer process red mud washing system in aluminium oxide production process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107265488A (en) * | 2017-07-20 | 2017-10-20 | 辽宁东大粉体工程技术有限公司 | The process unit and method of a kind of two step method production γ type aluminum oxide |
| CN107986307A (en) * | 2017-12-29 | 2018-05-04 | 重庆市南川区先锋氧化铝有限公司 | A kind of vacuum type filtration apparatus that turns over for the production of red mud alumina by sintering |
-
2015
- 2015-07-03 CN CN201520475934.0U patent/CN204873870U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107265488A (en) * | 2017-07-20 | 2017-10-20 | 辽宁东大粉体工程技术有限公司 | The process unit and method of a kind of two step method production γ type aluminum oxide |
| CN107986307A (en) * | 2017-12-29 | 2018-05-04 | 重庆市南川区先锋氧化铝有限公司 | A kind of vacuum type filtration apparatus that turns over for the production of red mud alumina by sintering |
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| CF01 | Termination of patent right due to non-payment of annual fee |