CN201296674Y - Oxalate eliminating system for sodium aluminate solution - Google Patents
Oxalate eliminating system for sodium aluminate solution Download PDFInfo
- Publication number
- CN201296674Y CN201296674Y CNU2008202202525U CN200820220252U CN201296674Y CN 201296674 Y CN201296674 Y CN 201296674Y CN U2008202202525 U CNU2008202202525 U CN U2008202202525U CN 200820220252 U CN200820220252 U CN 200820220252U CN 201296674 Y CN201296674 Y CN 201296674Y
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- CN
- China
- Prior art keywords
- oxalate
- sodium aluminate
- filtrate
- filter
- aluminate solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The utility model discloses an oxalate eliminating system, in particular relates to a system for eliminating oxalate of sodium aluminate solution. The system for eliminating oxalate of sodium aluminate solution comprises the following structures: a filtering machine for filtering thin seeds and attached liquid from seed grading; a hot-water tank for providing hot water for the filtering machine to clean the thin seeds and attached liquid; a filtrate receiver or causticizing tank where filtered filtrate is sent; and a mother liquor tank where separated seed mother liquor. The utility model has the following advantages and effects: the utility model uses hot water to clean two-stage cyclone bottom flow thin seeds so that oxalate adsorbed at the surfaces of the thin seeds is dissolved in hot water. Meanwhile, caustification of thick filtrate is carried out by lime cream to eliminate oxalate accumulated in the flow so that the oxalate in the flow remains at a certain concentration range and the stable operation of aluminum oxide production is guaranteed.
Description
Technical field
The utility model relates to a kind of system of removing oxalate, relates in particular to the system of particularly Bayer process being removed the oxalate in the sodium aluminate solution in production field of metallurgy in aluminum oxide Bayer process production process.
Background technology
Owing to contain organism in the bauxite, in the process of carrying out alumina producing, because heat workshop section is arranged, the organism that brings in these ores is transformed into oxalate in the technological process of alumina producing Bayer process, and in whole alumina technology flow process, accumulate, when the concentration of oxalate to certain degree, just the production to aluminum oxide produces harm, make aluminum oxide exsolution red mud sedimentation difficulty, and bring problems such as seed decomposed product downgrade.
The utility model content
The utility model is exactly that a kind of systems approach of removing sodium aluminate solution medium-height grass hydrochlorate is provided in order to solve the problems of the technologies described above, and its objective is in order to remove cumulative oxalate in the sodium aluminate solution, so that alumina producer can normally move.
Be achieved in that a kind of system of removing sodium aluminate solution medium-height grass hydrochlorate for reaching above-mentioned purpose the utility model, it is made of following structure: thin seed and attached liquid that seed grading is sent here carry out filtering filter; Provide hot water to clean the hot water tank of thin seed and attached liquid to filter; Filtrate filtered is delivered to filtrate receiver or causticizing tank; Isolating seed precipitation solution is delivered to mother liquor tank.
Described filter is a band filter.
Described band filter liquid outlet is three, front end exit, central exit and seed precipitation solution back outlet.
Contain the deliver to filtrate receiver of the low filtrate of sodium oxalate concentration after the described filtration from the front end exit of filter.
Contain the high filtrate of sodium oxalate concentration after the described filtration and deliver to causticizing tank from the central exit of filter.
Advantage of the present utility model and effect are as follows:
The utility model adopts hot water to clean the thin seed of secondary eddy flow underflow, and the sodium oxalate that is adsorbed on thin seed-coat is dissolved in the hot water.With milk of lime dense filtrate is carried out causticization, sodium oxalate enters the causticization slag and discharges flow process, thereby gets rid of cumulative oxalate in the flow process, and the oxalate in the flow process is remained in certain concentration range, guarantees the steady running of alumina producing.
Description of drawings
Fig. 1 is the structural representation that the utility model is removed the system of sodium aluminate solution medium-height grass hydrochlorate.
Among the figure: 1, filter; 2, hot water tank; 3, filtrate receiver; 4, causticizing tank; 5, mother liquor tank; 6, thin seed and attached liquid; 7, hot water; 8, thin seed; 9, lime latex dust; 10, hot water.
Embodiment
Below embodiment of the present utility model is described in detail in conjunction with the accompanying drawings, but protection domain of the present utility model is not limit by embodiment.
The utility model is removed the system of sodium aluminate solution medium-height grass hydrochlorate as shown in Figure 1, and be made of following structure: thin seed and attached liquid 6 that seed grading is sent here carry out filtering filter 1; Provide hot water 7 to clean the hot water tank 2 of thin seed and attached liquid 6 to filter 1; Filtrate filtered is delivered to filtrate receiver 3 or causticizing tank 4, and causticizing tank 4 is communicated with lime latex dust 9; Isolating seed precipitation solution is delivered to mother liquor tank 5; The thin seed 8 that filters out is collected.
Described filter is a band filter, and the band filter liquid outlet is three, front end exit, central exit and seed precipitation solution back outlet; Filter the deliver to filtrate receiver of concentration low filtrate in back from the front end exit of filter; Filter the high filtrate of back concentration and deliver to causticizing tank from the central exit of filter.
Take out the method for sodium aluminate solution medium-height grass hydrochlorate, be made of following step: thin seed and attached liquid 6 usefulness hot water 7 that seed grading is sent here clean, and filter after the cleaning; Filtering filtrate is classified; The thin seed 8 that filters out is collected.Clean, filter and be sorted in the filter 1 and carry out; Band filter is delivered to thin seed 8 in the receiving tank after on the travelling belt thin seed and attached liquid 6 usefulness hot water 7 being cleaned.The front end exit of band filter 1 is delivered to filtrate receiver 3 with thin seed and attached liquid with the low filtrate of hot water cleaning back concentration; The central exit of band filter 1 is delivered to causticizing tank 4 with thin seed and attached liquid with the high filtrate of hot water cleaning back concentration, adds milk of lime in causticizing tank 4 the high filtrate of concentration is carried out causticization; The seed precipitation solution back outlet of band filter 1 is delivered to mother liquor tank 5 with isolating seed precipitation solution.
Sodium oxalate gets rid of that principle is based on that sodium oxalate very easily is dissolved in hot water and the characteristic that is slightly soluble in dense liquid caustic adopts hot water to clean the sodium oxalate that is adsorbed on thin seed-coat, and it is dissolved in the hot water.So the utility model adopts band filter to filter to the thin seed that seed filters operation, with hot water thin seed is cleaned simultaneously, the filtrate after washing is carried out causticization with milk of lime, thereby reaches the purpose of removing oxalate.
Wherein sodium aluminate solution is meant: after filtering solution after the stripping of bauxitic ore alumina producing mesohigh.Thin seed and attached liquid are meant: the mixed slurry of sodium aluminate solution after cooling produces crystallization after the high pressure stripping.Oxalate is mainly sodium oxalate in solution.
Claims (5)
1, remove the system of sodium aluminate solution medium-height grass hydrochlorate, it is characterized in that it is made of following structure: thin seed and attached liquid that seed grading is sent here carry out filtering filter; Provide hot water to clean the hot water tank of thin seed and attached liquid to filter; Filtrate filtered is delivered to filtrate receiver or causticizing tank; Isolating seed precipitation solution is delivered to mother liquor tank.
2, the system of removal sodium aluminate solution medium-height grass hydrochlorate according to claim 1 is characterized in that described filter is a band filter.
3, the system of removal sodium aluminate solution medium-height grass hydrochlorate according to claim 2 is characterized in that described band filter liquid outlet is three, front end exit, central exit and seed precipitation solution back outlet.
4, the system of removal sodium aluminate solution medium-height grass hydrochlorate according to claim 1 is characterized in that containing after the described filtration the deliver to filtrate receiver of the low filtrate of sodium oxalate concentration from the front end exit of filter.
5, the system of removal sodium aluminate solution medium-height grass hydrochlorate according to claim 1 is characterized in that containing the high filtrate of sodium oxalate concentration after the described filtration delivers to causticizing tank from the central exit of filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202202525U CN201296674Y (en) | 2008-12-03 | 2008-12-03 | Oxalate eliminating system for sodium aluminate solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008202202525U CN201296674Y (en) | 2008-12-03 | 2008-12-03 | Oxalate eliminating system for sodium aluminate solution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201296674Y true CN201296674Y (en) | 2009-08-26 |
Family
ID=41042646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008202202525U Expired - Fee Related CN201296674Y (en) | 2008-12-03 | 2008-12-03 | Oxalate eliminating system for sodium aluminate solution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201296674Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101575111B (en) * | 2008-05-08 | 2011-04-06 | 沈阳铝镁设计研究院 | System and method for removing oxalate in sodium aluminate solution |
| CN101734696B (en) * | 2009-12-14 | 2012-04-25 | 中铝国际技术发展有限公司 | Method for removing organic matter by Bayer process |
| CN105731511A (en) * | 2016-01-19 | 2016-07-06 | 中国铝业股份有限公司 | Method for desorbing sodium oxalate from decomposed stoste |
-
2008
- 2008-12-03 CN CNU2008202202525U patent/CN201296674Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101575111B (en) * | 2008-05-08 | 2011-04-06 | 沈阳铝镁设计研究院 | System and method for removing oxalate in sodium aluminate solution |
| CN101734696B (en) * | 2009-12-14 | 2012-04-25 | 中铝国际技术发展有限公司 | Method for removing organic matter by Bayer process |
| CN105731511A (en) * | 2016-01-19 | 2016-07-06 | 中国铝业股份有限公司 | Method for desorbing sodium oxalate from decomposed stoste |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090826 Termination date: 20111203 |