CN203159242U - Bayer-process aluminum oxide production system using carbide slag instead of lime - Google Patents
Bayer-process aluminum oxide production system using carbide slag instead of lime Download PDFInfo
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- CN203159242U CN203159242U CN 201320024786 CN201320024786U CN203159242U CN 203159242 U CN203159242 U CN 203159242U CN 201320024786 CN201320024786 CN 201320024786 CN 201320024786 U CN201320024786 U CN 201320024786U CN 203159242 U CN203159242 U CN 203159242U
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Abstract
The utility model relates to a Bayer-process aluminum oxide production system using carbide slag instead of lime, which comprises a causticization salt discharge production facility and a filtration production facility mainly composed of a leaf filter, wherein the causticization salt discharge production facility comprises a salt crystallization and settling tank, an overflow tank and a mother liquor tank which are sequentially connected, and a filtering machine, a filter cake tank, a salt dissolution tank, a causticization tank, a causticization and settling tank, and a washing and settling tank which are sequentially connected; the salt crystallization and settling tank is connected with the filtering machine through a pipeline and an underflow pump, and connected with the overflow tank through a pipeline and an overflow pump; and the causticization and settling tank is connected with the mother liquor tank through a pipeline and an overflow pump, and connected with the washing and settling tank through a pipeline and an underflow pump. The utility model has the advantages of high production efficiency, favorable use effect, low energy consumption and fewer steps, sufficiently and effectively utilizes the raw materials, and is convenient to operate and easy to manage. Meanwhile, the utility model can implement high-efficiency high-value reutilization of massive solid waste carbide slag, and thus, has obvious economic, environmental social benefits.
Description
Technical field
The utility model belongs to the alumina producing field, relates to a kind of Bayer process alumina producing system of replacing carbide slag with lime.
Background technology
Mainly contain Ca (OH) in the calcium carbide waste slag
2, can make the surrogate of slaked lime, extensively be used in industries such as building, chemical industry, metallurgy, agricultural.But when the calcium carbide waste slag water content surpassed 50%, its form was thick pulpous state, stored, transported difficulty, made troubles to the user.Experimental analysis shows that the carbide slag composition can replace lime, and carbide slag and lime composition see Table 1.
Table 1 lime and carbide slag analysis data are analyzed mean value
| Title | Calcium oxide content (%) | The active calcium ion content (g/L) |
| Milk of lime | 71.25 | 150.34 |
| Carbide slag | 63.25 | 145.77 |
By above data as can be seen, the effective constituent in carbide slag and the lime is calcium oxide, and calcium oxide content is more lower slightly than milk of lime with the active calcium ion content in the carbide slag, is not worth but do not influence normal production process.
According to the technological process of production, consume lime in causticization salt discharge, smart filter, raw material mill post, available carbide slag substitutes:
(1) calcium carbide mud replacing lime is used in the causticization post, and organic removal rate is more than 70%, for organic influence in the elimination system provides guarantee;
(2) smart filter post use calcium carbide mud replacing lime, the seminal fluid seston is all guaranteed at 0.015g/L, for the content of guaranteeing ferric oxide in the product provides reliable guarantee in acceptability limit.
Summary of the invention
The utility model is in order to remedy the deficiencies in the prior art, and the Bayer process alumina producing system of a kind of production efficiency height, replacing carbide slag with lime that result of use is good is provided.
The utility model is achieved by the following technical solution:
The Bayer process alumina producing system of replacing carbide slag with lime of the present utility model, comprise causticization salt discharge production unit and based on the filtration production unit of leaf filter, its special character is: causticization salt discharge production unit comprises salt crystallization subsider, overflow groove, the mother liquor tank that connects successively, and the filter, filter cake groove, salt dissolving tank, causticizing tank, causticization subsider, the washing settling groove that connect successively; Wherein, salt crystallization subsider is connected filter by pipeline with the underflow pump, is connected overflow groove by pipeline with overflow type pump; The causticization subsider is connected former liquid bath by pipeline with overflow type pump, be connected washing settling groove by pipeline with the underflow pump.
Filter production unit and comprise thick liquid bath, leaf filter, seminal fluid groove, the filter cake groove that connects successively, thick liquid bath is by crude liquor pump and pipe connection leaf filter, leaf filter is by seminal fluid pump and pipe connection seminal fluid groove, the seminal fluid groove connects plate-type heat exchanger, leaf filter also connects the filter cake groove, and the filter cake groove connects the sedimentation rinse bath.
The beneficial effects of the utility model are, production efficiency height, result of use are good, fully effectively utilize starting material, energy consumption is low, operation is few, easy to operate, be easy to management.Simultaneously, can realize the efficient high value recycling of large solid waste carbide slag, economy, environment and obvious social benefit.
Description of drawings
Fig. 1 is causticization salt discharge technological process of production synoptic diagram of the present utility model.Fig. 2 is leaf filter filtration process schematic flow sheet.
Embodiment
Accompanying drawing is a kind of specific embodiment of the present utility model.
(1) the carbide slag replace lime is used for causticization salt discharge production unit and technology
Causticization salt discharge production unit comprises salt crystallization subsider, overflow groove, the mother liquor tank that connects successively, and the filter, filter cake groove, salt dissolving tank, causticizing tank, causticization subsider, the washing settling groove that connect successively; Wherein, salt crystallization subsider is connected filter by pipeline with the underflow pump, is connected overflow groove by pipeline with overflow type pump; The causticization subsider is connected former liquid bath by pipeline with overflow type pump, be connected washing settling groove by pipeline with the underflow pump.
Production technique is: it is settlement separate that the saliferous slip that pump feed evaporator comes enters salt crystallization subsider, overflow groove is gone in overflow, deliver to mother liquor tank by overflow type pump, and underflow advances filter by the underflow pumping, filter cake is gone into the filter cake groove earlier, go into the salt dissolving tank then and behind the hot water dissolving, again through being pumped into the upright dish of causticization (causticizing tank), filter cake with return decomposition workshop crystal seed tempering tank after the seminal fluid that the leaf filter post is sent here mixes.The carbide slag that polyvinyl chloride factory produces imports in the ashing groove through forklift, add the sedimentation post and carry the primary wash liquor of coming, after stirring the back ashing, the pumping dashpot, through after the buffering again by pump in piping is delivered to the causticizing tank of causticization salt discharge operation.Filtrate is pumped into causticizing tank and carbide slag hybrid reaction by soda solution, and feeds the temperature raising of low pressure live steam.The causticization slip that causticization is good advances the causticization subsider, and former liquid bath is sent in the overflow of causticization subsider, and underflow is delivered to alumina producer sedimentation workshop washing settling groove and further handled, and substitutes part sedimentation wash water or enter the red mud storage tank to deliver to the stockyard.
Carbide slag concentration: CaO=180-200g/L
Carbide slag addition (CaO)/(Na
2O)=1.20
Causticization post carbide slag add-on is 26m
3/ h, amounting to 1 year use calcium carbide quantity of slag is 6.84 ten thousand tons.
(2) the carbide slag replace lime is as flocculating aids production unit and technology
Filter production unit and comprise thick liquid bath, leaf filter, seminal fluid groove, the filter cake groove that connects successively, thick liquid bath is by crude liquor pump and pipe connection leaf filter, leaf filter is by seminal fluid pump and pipe connection seminal fluid groove, the seminal fluid groove connects plate-type heat exchanger, leaf filter also connects the filter cake groove, and the filter cake groove connects the sedimentation rinse bath.
Production technique: the thick liquid bath of smart filter operation is sent in the separation tank overflow by overflow type pump (crude liquor pump), get to leaf filter with variable-frequency control pump (crude liquor pump), filtrate is passed filter cloth and flow into the seminal fluid groove certainly after collector tube is gathered under the pressure difference effect, be pumped to the plate-type heat exchanger of decomposition by seminal fluid, being isolated in outer white residue is attached on the filter cloth, by the dump operation filter cake is delivered to the filter cake groove, be pumped to the sedimentation rinse bath through filter cake, through backflush recovery attached liquid wherein.In conjunction with characteristics and the requirement of this operation, research is by experiment used milk of lime instead calcium carbide mud and is helped to filter as flocculating aids.The carbide slag process forklift of polyvinyl chloride factory generation imports in the ashing groove, adds the sedimentation post and carries the primary wash liquor of coming, and after the process stirring back ashing, the pumping dashpot is filtered in the thick liquid bath in post through delivering to essence by pump through piping again after the buffering.
Seminal fluid AO:160～170g/L;
Seminal fluid seston≤0.015g/L;
Seminal fluid temperature: 100～105 ℃;
Leaf filter working pressure 3.8bar(gauge pressure), alarm pressure 3.5bar(gauge pressure), design pressure 5.3bar(gauge pressure);
Carbide slag the active calcium ion content: 160～200g/L; Calcium carbide mud add-on: 1.5%;
Smart filter post carbide slag add-on 32m
3/ h, amounting to a year use calcium carbide quantity of slag is 8.4 ten thousand tons.
Claims (2)
1. the Bayer process alumina producing system of a replacing carbide slag with lime, comprise causticization salt discharge production unit and based on the filtration production unit of leaf filter, it is characterized in that: causticization salt discharge production unit comprises salt crystallization subsider, overflow groove, the mother liquor tank that connects successively, and the filter, filter cake groove, salt dissolving tank, causticizing tank, causticization subsider, the washing settling groove that connect successively; Wherein, salt crystallization subsider is connected filter by pipeline with the underflow pump, is connected overflow groove by pipeline with overflow type pump; The causticization subsider is connected former liquid bath by pipeline with overflow type pump, be connected washing settling groove by pipeline with the underflow pump.
2. the Bayer process alumina producing system of replacing carbide slag with lime according to claim 1, it is characterized in that: filter production unit and comprise thick liquid bath, leaf filter, seminal fluid groove, the filter cake groove that connects successively, thick liquid bath is by crude liquor pump and pipe connection leaf filter, leaf filter is by seminal fluid pump and pipe connection seminal fluid groove, the seminal fluid groove connects plate-type heat exchanger, leaf filter also connects the filter cake groove, and the filter cake groove connects the sedimentation rinse bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320024786 CN203159242U (en) | 2013-01-17 | 2013-01-17 | Bayer-process aluminum oxide production system using carbide slag instead of lime |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320024786 CN203159242U (en) | 2013-01-17 | 2013-01-17 | Bayer-process aluminum oxide production system using carbide slag instead of lime |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203159242U true CN203159242U (en) | 2013-08-28 |
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| CN 201320024786 Expired - Fee Related CN203159242U (en) | 2013-01-17 | 2013-01-17 | Bayer-process aluminum oxide production system using carbide slag instead of lime |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103043693A (en) * | 2013-01-17 | 2013-04-17 | 信发集团有限公司 | Bayer-method-based aluminum oxide production system using carbide slag instead of lime |
| CN107827131A (en) * | 2017-12-25 | 2018-03-23 | 河南有色汇源铝业有限公司 | A kind of method of alumina producing Bayer process |
-
2013
- 2013-01-17 CN CN 201320024786 patent/CN203159242U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103043693A (en) * | 2013-01-17 | 2013-04-17 | 信发集团有限公司 | Bayer-method-based aluminum oxide production system using carbide slag instead of lime |
| CN103043693B (en) * | 2013-01-17 | 2015-03-18 | 信发集团有限公司 | Bayer-method-based aluminum oxide production system using carbide slag instead of lime |
| CN107827131A (en) * | 2017-12-25 | 2018-03-23 | 河南有色汇源铝业有限公司 | A kind of method of alumina producing Bayer process |
| CN107827131B (en) * | 2017-12-25 | 2020-05-12 | 河南有色汇源铝业有限公司 | Method for producing aluminum oxide by Bayer process |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130828 Termination date: 20160117 |
|
| EXPY | Termination of patent right or utility model |