CN102234121A - Method and device for pre-desilication with high solid content - Google Patents
Method and device for pre-desilication with high solid content Download PDFInfo
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- CN102234121A CN102234121A CN2010101540600A CN201010154060A CN102234121A CN 102234121 A CN102234121 A CN 102234121A CN 2010101540600 A CN2010101540600 A CN 2010101540600A CN 201010154060 A CN201010154060 A CN 201010154060A CN 102234121 A CN102234121 A CN 102234121A
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- desiliconization
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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
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Abstract
The invention discloses a method and a device for pre-desilication with a high solid content, and the method comprises the following steps: adding a circulating mother liquid into grinded original pulp to obtain pulp with a solid content of 500-1000 g/l, injecting the pulp with a solid content of 500-1000 g/l into a desilication groove for pre-desilication treatment, after pre-desilication treatment, adding the pulp into the circulating mother liquid so as to dilute the pulp to obtain a solid content required by a next procedure. The method of the invention decreases material flow, reduces required desilication devices, and reduces corresponding construction investment; as a result of the reduction of devices, the process flow is simplified; therefore workload for operation, maintenance, and overhaul is reduced, and the production cost is saved. The desilication efficiency is significantly increased; silicon scar formation in subsequent procedures such as dissolution and the like is reduce; thermal efficiency, dissolution efficiency and system operation ratio are increased; and thereby good effects of energy saving and consumption reduction are reached. In addition, expensive high pressure pump in the next procedure is effectively protected, and the service life of the high pressure pump is prolonged.
Description
Technical field
The present invention relates to a kind of method and device of pre-desiliconization, particularly relate to high method and the device that contains pre-desiliconization admittedly in a kind of producing aluminium oxide by bayer flow process.
Background technology
In order to reduce the harm of silicon to aluminum oxide production process, in the flow process of producing aluminium oxide by bayer, be typically provided with desiliconization process, its desiliconization time is 8 ~ 12 hours, about 95 ~ 105 ℃ of the temperature of desiliconization.At present, adopt all in the alumina producing flow process and lowly contain admittedly that (250 ~ 300g/l) desilication process, this technology are to add circulating mother liquor in the raw pulp behind the bauxite mill, solids content in the ore pulp are diluted to reinject behind 250 ~ 300g/l desiliconization slot to carry out desiliconization.It is this that low to contain the desilication process logistics capacity admittedly big, required desiliconization equipment is many, energy consumption is high, long flow path, Maintenance and Repair workload greatly and desiliconization efficient undesirable.In addition, pre-desiliconization temperature is generally about 100 ℃, and the high-pressure pump of the next procedure mesohigh stripping charging of pre-desiliconization after handling only allows to work below the temperature at 95 ℃, if overtemperature work can influence the working life of expensive high-pressure pump.
Summary of the invention
The objective of the invention is to; high method for desilication and the device that contains admittedly in a kind of producing aluminium oxide by bayer flow process is provided; to reduce the logistics capacity of desilication process; shortened process; cut down the consumption of energy, reduce facility investment and maintenance of equipment amount, improve desiliconization efficient; effectively protect expensive high-pressure pump in the next procedure, thereby overcome the deficiencies in the prior art.
Technical scheme of the present invention: a kind of high method that contains pre-desiliconization admittedly of the present invention is, this method is to add circulating mother liquor in the raw pulp behind mill, making the solids content in the ore pulp is 500 ~ 1000g/l, with solids content is that the ore pulp of 500 ~ 1000g/l injects desiliconization slot and carries out pre-desiliconization and handle, and adds circulating mother liquor again in the ore pulp after pre-desiliconization is handled then and makes ore pulp be diluted to the required solid content of next procedure.
Above-mentioned height contains in the method for pre-desiliconization admittedly, and described solids content is 750 ~ 850g/l.
Aforementioned height contains in the method for pre-desiliconization admittedly, and described solids content is 800g/l.
The device that a kind of height that is used for the inventive method contains pre-desiliconization admittedly is, this device comprises desiliconization slot, and the opening for feed of desiliconization slot is connected with ore slurry pipeline, and the discharge port of desiliconization slot is connected with the carrier pipe of next procedure through discharging pump; It is characterized in that: this device also comprises the circulating mother liquor pipe, and the circulating mother liquor pipe is connected with dilution tube with adjustable pipe respectively through threeway, and adjustable pipe is connected with the opening for feed of desiliconization slot through valve, and dilution tube is connected with the carrier pipe of next procedure through valve.
According to technique scheme, the present invention is carried out following experiment:
Experimental example 1
Experiment condition: the main component (Nk=200g/l Rp=0.6) of bauxite unit consumption (2.0t/t-Al2O3), proportion (3200kg/t-ore deposit) and circulating mother liquor;
Experiment purpose: compare logistics capacity;
Experimentation: under same experimental conditions, when pulp solids content was 300g/l, the pre-desiliconization mineral slurry flux of unit product was 11.9m3/t-Al2O3; When pulp solids content was 800g/l, the pre-desiliconization mineral slurry flux of unit product was 5.8m3/t-Al2O3;
Experimental result: 51.8% of the pre-desiliconization mineral slurry flux of unit product when the pre-desiliconization mineral slurry flux of the unit product when pulp solids content is 800g/l only is 300g/l for pulp solids content.
Conclusion: illustrate and adopt the high logistics capacity that desiliconization can reduce desilication process significantly that contains admittedly.
Experimental example 2
Experiment condition: adopt identical alum clay sample ore, pre-desiliconization temperature is 95 ℃, and alkali concn is Nk 180g/l;
Experiment purpose: compare desiliconization efficient;
Experimentation one: pre-desiliconization is 8 hours under same experimental conditions, and when pulp solids content was brought up to 800g/l by 600g/l, desiliconization efficient improved 14.81%, and when further raising contained 1000g/l admittedly, its desiliconization efficient reduced by 2.97% on the contrary;
Experimentation two: pre-desiliconization is 12 hours under same experimental conditions, and when pulp solids content was brought up to 800g/l by 600g/l, desiliconization efficient improved 2.96%, and when further raising contained 1000g/l admittedly, its desiliconization efficient reduced by 15.86% on the contrary;
Experimental result: when pulp solids content is 800g/l desiliconization most effective, desiliconization efficient was taken second place when pulp solids content was 800g/l, desiliconization efficient was lower when pulp solids content was 800g/l;
Conclusion: illustrate that desiliconization was most effective when pulp solids content was 800g/l.
Compared with prior art, by above-mentioned experimental example as can be known, the present invention can reduce mass flow, and required desiliconization equipment also can reduce, and corresponding construction investment also can reduce, and when bringing up to 800g/l as containing admittedly by 300g/l, then construction investment can reduce about 48.2%.Because equipment reduces, flow process is simplified, so the workload of Operation and Maintenance maintenance also reduces, can save production cost.Desiliconization efficient is significantly improved, and the minimizing that scabs of the silicon of subsequent handlings such as stripping is improved the operation factor of thermo-efficiency, dissolution efficiency and system, thereby has reached good result energy-conservation, consumption reduction.In addition, make the ore pulp dilution,, also can effectively protect expensive high-pressure pump in the next procedure, prolong the working life of high-pressure pump so the slurry temperature after the dilution reduces owing to add circulating mother liquor in the ore pulp after pre-desiliconization is handled again.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Being labeled as in the accompanying drawing: 1-desiliconization slot, 2-ore slurry pipeline, 3-discharging pump, the carrier pipe of 4-next procedure, 5-circulating mother liquor pipe, 6-threeway, 7-adjustable pipe, 8-dilution tube, 9-valve.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
Embodiment.Method of the present invention as shown in Figure 1, a kind of high method that contains pre-desiliconization admittedly, this method is to add circulating mother liquor in the raw pulp behind mill, making the solids content in the ore pulp is 500 ~ 1000g/l, being preferably the solids content that makes in the ore pulp is 750 ~ 850g/l, preferably making the solids content in the ore pulp is 800g/l, with solids content is that the ore pulp of 800g/l injects desiliconization slot and carries out pre-desiliconization and handle, and adds circulating mother liquor again in the ore pulp after pre-desiliconization is handled then and makes ore pulp be diluted to the required solid content of next procedure.
Above-mentioned height contains the used device of method of pre-desiliconization admittedly, comprises desiliconization slot 1, and the opening for feed of desiliconization slot 1 is connected with ore slurry pipeline 2, and the discharge port of desiliconization slot 1 is connected with the carrier pipe 4 of next procedure through discharging pump 3; It is characterized in that: this device also comprises circulating mother liquor pipe 5, and circulating mother liquor pipe 5 is connected with dilution tube 8 with adjustable pipe 7 respectively through threeway 6, and adjustable pipe 7 is connected through the opening for feed of valve 9 with desiliconization slot 1, and dilution tube 8 is connected with the carrier pipe 4 of next procedure through valve 9.
Claims (4)
1. one kind high method that contains pre-desiliconization admittedly, it is characterized in that: this method is to add circulating mother liquor in the raw pulp behind mill, making the solids content in the ore pulp is 500 ~ 1000g/l, with solids content is that the ore pulp of 500 ~ 1000g/l injects desiliconization slot and carries out pre-desiliconization and handle, and adds circulating mother liquor again in the ore pulp after pre-desiliconization is handled then and makes ore pulp be diluted to the required solid content of next procedure.
2. contain the method for pre-desiliconization according to the described height of claim 1 admittedly, it is characterized in that: described solids content is 750 ~ 850g/l.
3. contain the method for pre-desiliconization according to the described height of claim 2 admittedly, it is characterized in that: described solids content is 800g/l.
4. one kind high device that contains pre-desiliconization admittedly comprises desiliconization slot (1), and the opening for feed of desiliconization slot (1) is connected with ore slurry pipeline (2), and the discharge port of desiliconization slot (1) is connected with the carrier pipe (4) of next procedure through discharging pump (3); It is characterized in that: this device also comprises circulating mother liquor pipe (5), circulating mother liquor pipe (5) is connected with dilution tube (8) with adjustable pipe (7) respectively through threeway (6), adjustable pipe (7) is connected through the opening for feed of valve (9) with desiliconization slot (1), and dilution tube (8) is connected with the carrier pipe (4) of next procedure through valve (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101540600A CN102234121A (en) | 2010-04-23 | 2010-04-23 | Method and device for pre-desilication with high solid content |
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| CN2010101540600A CN102234121A (en) | 2010-04-23 | 2010-04-23 | Method and device for pre-desilication with high solid content |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103588232A (en) * | 2012-08-16 | 2014-02-19 | 贵阳铝镁设计研究院有限公司 | Method and apparatus for rapidly removing silicon from raw ore pulp |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1145879A (en) * | 1996-06-28 | 1997-03-26 | 中国长城铝业公司 | Technological process of pre-desiliconization for bauxite slurry |
| CN1923696A (en) * | 2006-10-13 | 2007-03-07 | 中国铝业股份有限公司 | Method of dissolving high grade gibbsite type bauxite by bayer process |
| CN201686498U (en) * | 2010-04-23 | 2010-12-29 | 贵阳铝镁设计研究院 | High-solid-content pre-desiliconization device |
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2010
- 2010-04-23 CN CN2010101540600A patent/CN102234121A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1145879A (en) * | 1996-06-28 | 1997-03-26 | 中国长城铝业公司 | Technological process of pre-desiliconization for bauxite slurry |
| CN1923696A (en) * | 2006-10-13 | 2007-03-07 | 中国铝业股份有限公司 | Method of dissolving high grade gibbsite type bauxite by bayer process |
| CN201686498U (en) * | 2010-04-23 | 2010-12-29 | 贵阳铝镁设计研究院 | High-solid-content pre-desiliconization device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103588232A (en) * | 2012-08-16 | 2014-02-19 | 贵阳铝镁设计研究院有限公司 | Method and apparatus for rapidly removing silicon from raw ore pulp |
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Application publication date: 20111109 |