CN103663518A - Digested alumina slurry heating method - Google Patents
Digested alumina slurry heating method Download PDFInfo
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- CN103663518A CN103663518A CN201310602477.2A CN201310602477A CN103663518A CN 103663518 A CN103663518 A CN 103663518A CN 201310602477 A CN201310602477 A CN 201310602477A CN 103663518 A CN103663518 A CN 103663518A
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- heating
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
Abstract
The invention provides a digested alumina slurry heating method and relates to a Bayer process for producing alumina, in particular to a heating method for slurry made from bauxite and caustic soda solution when a tube digestion process is adopted for producing alumina. The method is characterized in that during the heating process, solar energy is adopted for heating the digested alumina slurry. According to the heating method, a heat transfer medium is heated to 300-500 DEG C and then used for heating the slurry in an alumina tube digester, so as to enable the temperature and pressure of the slurry to reach the temperature and pressure required by an alumina digestion reaction. The heating method avoids fossil energy consumption in the alumina production process, changes the high-consumption present state in the alumina industry, and has obvious technical and economical advantages.
Description
Technical field
Heating means for alumina leaching slurry, relate to a kind of producing aluminium oxide by bayer, especially adopt tube digestion to produce aluminum oxide by the heating means of bauxite and soda lye finish mix slurry.
Background technology
In aluminum oxide production process, producing aluminium oxide by bayer comprises four master operations, i.e. stripping, separation, decomposition, roasting.Wherein stripping must realize in the environment of High Temperature High Pressure, while especially adopting tube digestion to produce aluminum oxide, to pass through indirect heating mode, make to reach alumina leaching by bauxite and soda lye finish mix slurry and react required temperature and pressure, thereby complete the production operation of choosing high purity aluminium oxide from bauxite.The fossil energy that this process need consumption is a large amount of, causes aluminum oxide production process energy consumption high, and environmental stress is large.
Summary of the invention
Object of the present invention is exactly the deficiency existing for above-mentioned prior art, and a kind of consumption that can effectively reduce fossil energy in alumina producing is provided, and reduces a large amount of greenhouse gas emissions, the heating means of the alumina leaching slurry reducing production costs.
The object of the invention is to be achieved through the following technical solutions.
Heating means for alumina leaching slurry, is characterized in that its heat-processed adopts sun power to carry out the heating of alumina leaching slurry.
The heating means of a kind of alumina leaching slurry of the present invention, it is characterized in that adopting sun power to carry out alumina leaching slurry heat-processed is that sunlight is projected to receptor by reflection mirror array, heat-transfer medium is heated to 300 to 350 degrees Celsius in receptor, the slip in recycling heat-transfer medium heated oxide aluminum tubes digester.
The heating means of a kind of alumina leaching slurry of the present invention, is characterized in that the device that its heat-processed adopts comprises: sunlight reflective mirror array; Receive the receptor of sunlight reflective mirror array reflected solar energy; The heating medium bin connecting with receptor, after this heating, medium bin connects with pipeline stripping heating medium liquid-inlet pipe; Connect the rear medium bin of heating with pipeline stripping heating medium drain pipe, after this heating, medium bin outlet end connects with the receptor liquid-inlet pipe that receives sunlight reflective mirror array reflected solar energy.
The heating means of a kind of alumina leaching slurry of the present invention, is characterized in that its heating medium is kerosene.
The heating means of a kind of alumina leaching slurry of the present invention, utilize reflective mirror array that sunlight is projected on receptor, and heat-transfer medium is heated to 300 to 350 degrees Celsius in solar receiver.The high-temperature heat-transfer medium of 300 to 350 degrees Celsius is stored in high temperature oil tank, again high temperature oil is transported to tube digestion system, heating is starched by bauxite and soda lye finish mix, make it reach alumina leaching and react required temperature and pressure, thereby complete the production operation of choosing high purity aluminium oxide from bauxite.
Method of the present invention, has eliminated and has produced the fossil energy consumption in alumina process, has changed the present situation of alumina industry high energy consumption, has obvious technical superiority and economic advantages.
Accompanying drawing explanation
Fig. 1 is the structural representation of the heating system of method employing of the present invention.
Embodiment
Heating means for alumina leaching slurry, its heat-processed adopts sun power to carry out the heating of alumina leaching slurry; Heat-processed is that sunlight is projected to receptor by reflection mirror array, heat-transfer medium is heated to 300 to 350 degrees Celsius in receptor, the slip in recycling heat-transfer medium heated oxide aluminum tubes digester; Its heating medium is kerosene.
The heating means of a kind of alumina leaching slurry of the present invention, the device that its heat-processed adopts comprises: sunlight reflective mirror array 1; Receive the receptor 2 of sunlight reflective mirror array reflected solar energy; The heating medium bin 3 connecting with receptor, after this heating, medium bin connects with pipeline stripping 4 heating medium liquid-inlet pipes; Connect the rear medium bin 5 of heating with pipeline stripping heating medium drain pipe, after this heating, medium bin outlet end connects with the receptor liquid-inlet pipe that receives sunlight reflective mirror array reflected solar energy.
The heating means of a kind of alumina leaching slurry of the present invention, is characterized in that
Below in conjunction with embodiment to processing method further instruction of the present invention:
Embodiment 1
Alumina producing adopts three boehmite tube digestion technology, utilizes sun power to realize alumina leaching reaction in bauxite.
Pilot project solar energy heating place is taken up an area 4000000 square metres, builds 10000 of 100 square metres of settled date reflective mirrors.Gather heat 12960000MJ every day, meet 280 tons of alumina producing of daily output required.
Claims (4)
1. heating means for alumina leaching slurry, is characterized in that its heat-processed adopts sun power to carry out the heating of alumina leaching slurry.
2. the heating means of a kind of alumina leaching slurry according to claim 1, it is characterized in that adopting sun power to carry out alumina leaching slurry heat-processed is that sunlight is projected to receptor by reflection mirror array, heat-transfer medium is heated to 300 to 350 degrees Celsius in receptor, the slip in recycling heat-transfer medium heated oxide aluminum tubes digester.
3. the heating means of a kind of alumina leaching slurry according to claim 1, is characterized in that the device that its heat-processed adopts comprises: sunlight reflective mirror array; Receive the receptor of sunlight reflective mirror array reflected solar energy; The heating medium bin connecting with receptor, after this heating, medium bin connects with pipeline stripping heating medium liquid-inlet pipe; Connect the rear medium bin of heating with pipeline stripping heating medium drain pipe, after this heating, medium bin outlet end connects with the receptor liquid-inlet pipe that receives sunlight reflective mirror array reflected solar energy.
4. the heating means of a kind of alumina leaching slurry according to claim 1, is characterized in that its heating medium is kerosene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310602477.2A CN103663518A (en) | 2013-11-26 | 2013-11-26 | Digested alumina slurry heating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310602477.2A CN103663518A (en) | 2013-11-26 | 2013-11-26 | Digested alumina slurry heating method |
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| Publication Number | Publication Date |
|---|---|
| CN103663518A true CN103663518A (en) | 2014-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310602477.2A Pending CN103663518A (en) | 2013-11-26 | 2013-11-26 | Digested alumina slurry heating method |
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| CN (1) | CN103663518A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107540008A (en) * | 2017-07-17 | 2018-01-05 | 刘长青 | A kind of alumina producing aluminium hydroxide digestion series |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010134077A2 (en) * | 2009-05-20 | 2010-11-25 | Yeda Research And Development Co. Ltd. | Catalytic gasification of organic matter in supercritical water |
| CN201768397U (en) * | 2010-08-17 | 2011-03-23 | 赵履祥 | Continuous reverse flow leaching device capable of being supplied with power in various means |
| CN103159239A (en) * | 2011-12-08 | 2013-06-19 | 贵阳铝镁设计研究院有限公司 | Heating method and apparatus of alumina dissolution sleeve |
| US20130181169A1 (en) * | 2012-01-12 | 2013-07-18 | Hanna H. Klein | Reforming of hydrocarbon gas with solar energy |
-
2013
- 2013-11-26 CN CN201310602477.2A patent/CN103663518A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010134077A2 (en) * | 2009-05-20 | 2010-11-25 | Yeda Research And Development Co. Ltd. | Catalytic gasification of organic matter in supercritical water |
| WO2010134077A3 (en) * | 2009-05-20 | 2012-04-05 | Yeda Research And Development Co. Ltd. | Catalytic gasification of organic matter in supercritical water |
| CN201768397U (en) * | 2010-08-17 | 2011-03-23 | 赵履祥 | Continuous reverse flow leaching device capable of being supplied with power in various means |
| CN103159239A (en) * | 2011-12-08 | 2013-06-19 | 贵阳铝镁设计研究院有限公司 | Heating method and apparatus of alumina dissolution sleeve |
| US20130181169A1 (en) * | 2012-01-12 | 2013-07-18 | Hanna H. Klein | Reforming of hydrocarbon gas with solar energy |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107540008A (en) * | 2017-07-17 | 2018-01-05 | 刘长青 | A kind of alumina producing aluminium hydroxide digestion series |
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Application publication date: 20140326 |