CN102259904A - Bayer process for producing alumina by using waste material in power plant instead of lime milk - Google Patents
Bayer process for producing alumina by using waste material in power plant instead of lime milk Download PDFInfo
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- CN102259904A CN102259904A CN2011101340878A CN201110134087A CN102259904A CN 102259904 A CN102259904 A CN 102259904A CN 2011101340878 A CN2011101340878 A CN 2011101340878A CN 201110134087 A CN201110134087 A CN 201110134087A CN 102259904 A CN102259904 A CN 102259904A
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- sodium aluminate
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- lime
- red mud
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- 235000008733 Citrus aurantifolia Nutrition 0.000 title claims abstract description 24
- 235000011941 Tilia x europaea Nutrition 0.000 title claims abstract description 24
- 239000004571 lime Substances 0.000 title claims abstract description 24
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 17
- 238000004131 Bayer process Methods 0.000 title claims abstract description 14
- 239000002699 waste material Substances 0.000 title abstract description 5
- 239000008267 milk Substances 0.000 title abstract 3
- 210000004080 milk Anatomy 0.000 title abstract 3
- 235000013336 milk Nutrition 0.000 title abstract 3
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229910001388 sodium aluminate Inorganic materials 0.000 claims abstract description 32
- 238000001914 filtration Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 17
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 13
- 230000023556 desulfurization Effects 0.000 claims abstract description 13
- 239000000428 dust Substances 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 5
- 239000002956 ash Substances 0.000 claims description 36
- 235000012054 meals Nutrition 0.000 claims description 27
- 238000005516 engineering process Methods 0.000 claims description 23
- 230000003311 flocculating effect Effects 0.000 claims description 23
- 230000005611 electricity Effects 0.000 claims description 16
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 16
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 15
- 229940024545 aluminum hydroxide Drugs 0.000 claims description 15
- 229910021502 aluminium hydroxide Inorganic materials 0.000 claims description 13
- 235000002918 Fraxinus excelsior Nutrition 0.000 claims description 12
- 239000012141 concentrate Substances 0.000 claims description 12
- 239000000243 solution Substances 0.000 claims description 12
- 210000000481 breast Anatomy 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 238000013467 fragmentation Methods 0.000 claims description 4
- 238000006062 fragmentation reaction Methods 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- 238000010790 dilution Methods 0.000 claims description 2
- 239000012895 dilution Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 4
- 230000001603 reducing effect Effects 0.000 abstract 1
- 239000000920 calcium hydroxide Substances 0.000 description 8
- 235000011116 calcium hydroxide Nutrition 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000003203 everyday effect Effects 0.000 description 5
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000029087 digestion Effects 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 239000006210 lotion Substances 0.000 description 2
- 239000012452 mother liquor Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 210000000582 semen Anatomy 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000005432 seston Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Images
Classifications
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
-
- 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
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- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention relates to a Bayer process for producing alumina by using a waste material in a power plant instead of lime milk. The process comprises steps of red mud separation and fine filtering, wherein a filter aid is added into sodium aluminate coarse liquid obtained after the red mud separation is performed to perform the fine filtering, is a mixture formed by uniformly mixing power plant desulfurization ash, electric dust collection ash powder and boiler ash in a mass ratio of (1-3):(2-7):(3-10), and is added in an amount which is 0.1 to 0.5 percent based on the weight of the sodium aluminate coarse liquid. In the process, the waste material produced by the power plant is used for replacing the conventional filter aid, namely the lime milk, the disruptive innovation is made, the waste material is utilized, investment is not required to be increased, energy saving and emission reducing effects and environment friendliness are achieved, and the production cost of the finished alumina product is effectively reduced.
Description
Technical field
The invention belongs to the dead meal processing technology field that power plant produces, be specifically related to a kind of power plant dead meal replacing lime breast and be used for
The technology of alumina producing Bayer process is promptly replaced existing milk of lime as the flocculating aids in the fine filtering operation with gather dust ashes and boiler ash of power plant's desulfurization ash, electricity.
Background technology
Existing alumina producing Bayer process, its operation is generally: ore is separated obtaining red mud and crude liquor of sodium aluminate with red-mud settlement through pre-desiliconization, stripping, crude liquor of sodium aluminate carries out fine filtering with the remaining seston of elimination by leaf filter again, thereby makes sodium aluminate concentrate solution; The back end hydrogenation alumina seed crystallization of then sodium aluminate concentrate solution being lowered the temperature, the aluminium hydroxide that crystallization is obtained is by decomposing and calcining process makes last aluminum oxide finished product at last.At present, carry out in the operation of fine filtering, generally use milk of lime, lime need be added that to be modulated into slurries after the water digestion be milk of lime as flocculating aids at crude liquor of sodium aluminate.In order to reduce the foreign matter content in the crude liquor of sodium aluminate, improved filter effect like this, generate milk of lime with regard to needing a large amount of unslaked lime and water to carry out digestion reaction, and need the corresponding personnel of outfit to operate.Calculate with a manufacturing enterprise that produces 2000000 tons of aluminum oxide per year, the water that is used for lime slaking every day then needs 1500 tons, lime slaking, decomposer operation also need about 2100 kilowatts of electricity consumption every day in addition, have caused the huge energy consumption and the wasting of resources, are unfavorable for energy-saving and emission-reduction and environmental protection.Therefore, be badly in need of a kind of crude liquor of sodium aluminate technology of fine filtering of energy-conserving and environment-protective at present.
Summary of the invention
The object of the invention is to provide a kind of power plant dead meal replacing lime breast to be used for the technology of alumina producing Bayer process, and this technology has effectively been utilized the dead meal that produces in power plant's production, and economical environment-protective greatly reduces production cost.
For achieving the above object, the present invention adopts following technical scheme:
A kind of power plant dead meal replacing lime breast is used for the technology of alumina producing Bayer process, comprise that red mud separates and the fine filtering operation, wherein, separate at red mud and to add flocculating aids in the gained crude liquor of sodium aluminate of back and carry out the fine filtering operation, described flocculating aids is by power plant desulfurization lime-ash, the electricity mixture that ashes and boiler ash form that gathers dust.The gained sodium aluminate concentrate solution enters next step crystalline aluminum hydroxide and separates out operation after filtering.
Concrete, gather dust ashes and boiler ash of described power plant desulfurization lime-ash, electricity can mix by mass ratio 1～3:2～7:3～10, and addition is 1 of crude liquor of sodium aluminate weight～5 ‰.Wherein, gather dust ashes and boiler ash of power plant desulfurization lime-ash, electricity mixes by mass ratio 1～2:2～5:3～7 and is advisable.
Detailed, a kind of power plant dead meal replacing lime breast is used for the technology of alumina producing Bayer process, and this method is:
1. raw material stripping: the ore charging feed mill wet method that fragmentation is good grinds, and makes qualified ore pulp and send the stripping operation;
2. red mud separates: the ore pulp stripping is after dilution enters the red mud separation circuit;
3. fine filtering: the separating obtained crude liquor of sodium aluminate of red mud enters leaf filter, does at power plant's dead meal to filter under the condition of flocculating aids, obtains sodium aluminate concentrate solution after the filtration; Wherein, described power plant dead meal is power plant desulfurization lime-ash, electricity ashes and the boiler ash mixture after by mass ratio 1～3:2～7:3～10 mixings that gathers dust, and the addition of flocculating aids is 1 of crude liquor of sodium aluminate weight～5 ‰;
4. prepare aluminum oxide: the gained sodium aluminate concentrate solution is mixed with aluminium hydroxide crystal seed after the interchanger cooling, through being pumped to the first groove of decomposer, interchanger cooling on decomposer, reduction gradually along with temperature, there is a large amount of aluminium hydroxide to separate out and grow up, deliver to by discharging pump again that filter the square position, washing, by belt aqueous aluminium-hydroxide powder is delivered to stoving oven and carry out roasting and obtain aluminum oxide.
The innovative point of technology of the present invention mainly is: dead meal desulfurization ash, the electricity of power plant gathered dust ashes and boiler ash in proportion behind the mixing, the flocculating aids that serves as the fine filtering operation, adopt dry method to add leaf filter, existingly make flocculating aids with milk of lime in order to replace.This technology does not change other parameter index of existing technology, and for example thick liquid temp, seminal fluid temperature, filter pressure and punishment in advance total amount etc. keep constant originally, comprise that follow-up crystalline aluminum hydroxide, decomposition and calcining process still adopt routine techniques.Calculate by producing 2000000 tons of aluminum oxide per year, (make flocculating aids with milk of lime before improving, improve the back and make flocculating aids with power plant's dead meal) the annual economic benefit that produces of enterprise before and after relatively improving: 1) can save 40,000,000 yuan in lime every year aspect raw material consumption; 2) aspect manpower, can save 600,000 yuan; 3) aspect energy-conservation, can economize on electricity about 540,000 yuan every year; 1,300 ten thousand yuan of solar term; Economize on water 3,500,000 yuan; Fecund goes out aluminum oxide increases by 5,000 ten thousand yuan of the output values; To sum up add up to about 1,107,640,000 yuan altogether.
Technology of the present invention replaces traditional flocculating aids milk of lime with the dead meal that power plant produces, and is once subversive innovation, is the concept updating on the bayer's process raw materials for production use, and is the change of a transcendency.This technology is effectively utilized power plant's waste material once more, and zero investment need not to increase investment, recycling economy, and economical environment-protective has reduced the production cost of aluminum oxide finished product.
Compare with existing processes, technology of the present invention has the following advantages:
(1) conservation, by the manufacturing enterprise that produces 2000000 tons of aluminum oxide per year, it is about more than 300 tons to save lime every day;
(2) save manpower and workshop section: the lime slaking operation can be cancelled, and saves the corresponding operating personnel simultaneously;
(3) water saving: produce 2000000 tons of Al per year
2O
3Manufacturing enterprise can save 1500 tons of lime slaking waters every day;
(4) economize on electricity: lime slaking, all electric power facilities of decomposer operation can be stopped using, and economize on electricity about 2100 kilowatts every day;
(5) main component of power plant's dead meal is S, C, Si, Al
2O
3With a small amount of Ca etc.,, be beneficial to and reduce Al owing to there is not CaO
2O
3Loss, can make 2 times of aluminum oxide losses be kept to minimum;
(6) because Al
2O
3Loss reduces, and crude liquor of sodium aluminate, seminal fluid ak difference are consistent substantially, in kind of segmentation rate of decomposition is improved, and makes Al
2O
3The unit production capacity improves, and saves the use of decomposer;
(7) owing to plant the Al of separatory
2O
3Concentration improves, and makes evaporization process reduce the evaporation liquid measure, can reduce steam consumption, per hour saves low-pressure steam (0.6MPA160 degree) 15T.
Description of drawings
Fig. 1 is the route map of technology of the present invention.
Embodiment
The present invention is described in detail by the following examples, but protection scope of the present invention is not limited thereto.
Embodiment 1
A kind of power plant dead meal replacing lime breast is used for the technology of alumina producing Bayer process, and this method is:
1. raw material stripping: 224 tons of charging feed mills of 2640 tons in ore that fragmentation is good and lime, and add qualified mother liquor wet method and grind, make the ore pulp that is contained in 350g/L admittedly, with 450 sides/hour flow send the stripping operation;
2. red mud separates: ore pulp through 260 ℃ of high temperature strippings after, the gained slip enters the red mud separation circuit after diluting with the sedimentation washing lotion;
3. fine filtering: the separating obtained crude liquor of sodium aluminate of red mud enters leaf filter, do at power plant's dead meal to filter under the condition of flocculating aids, obtain sodium aluminate concentrate solution after the filtration, wherein said power plant dead meal is power plant desulfurization lime-ash, electricity ashes and the boiler ash mixture after by mass ratio 1:3:4 mixing that gathers dust, and the addition of flocculating aids is 2 ‰ of a crude liquor of sodium aluminate weight;
4. prepare aluminum oxide: with the gained sodium aluminate concentrate solution after plate-type heat exchanger is cooled to 70 ℃, mix at seed mixer with aluminium hydroxide crystal seed, through being pumped to the first groove of decomposer, plate-type heat exchanger cooling on decomposer, reduction gradually along with temperature, there is a large amount of aluminium hydroxide to separate out and grow up, delivers to by discharging pump again that filter the square position, washing, by belt moisture about 8% aluminium-hydroxide powder is delivered to stoving oven and obtain about 1500 tons aluminum oxide in 1200 ℃ of high-temperature roastings.
Embodiment 2
A kind of power plant dead meal replacing lime breast is used for the technology of alumina producing Bayer process, and this method is:
1. raw material stripping: 224 tons of charging feed mills of 2640 tons in ore that fragmentation is good and lime, and add qualified mother liquor wet method and grind, make the ore pulp that is contained in 350g/L admittedly, with 450 sides/hour flow send the stripping operation;
2. red mud separates: ore pulp through 260 ℃ of high temperature strippings after, the gained slip enters the red mud separation circuit after diluting with the sedimentation washing lotion;
3. fine filtering: the separating obtained crude liquor of sodium aluminate of red mud enters leaf filter, do at power plant's dead meal to filter under the condition of flocculating aids, obtain sodium aluminate concentrate solution after the filtration, wherein said power plant dead meal is power plant desulfurization lime-ash, electricity ashes and the boiler ash mixture after by mass ratio 2:5:7 mixing that gathers dust, and the addition of flocculating aids is 5 ‰ of a crude liquor of sodium aluminate weight;
4. prepare aluminum oxide: with the gained sodium aluminate concentrate solution after plate-type heat exchanger is cooled to 70 ℃, mix at seed mixer with aluminium hydroxide crystal seed, through being pumped to the first groove of decomposer, plate-type heat exchanger cooling on decomposer, reduction gradually along with temperature, there is a large amount of aluminium hydroxide to separate out and grow up, delivers to by discharging pump again that filter the square position, washing, by belt moisture about 8% aluminium-hydroxide powder is delivered to stoving oven and obtain about 1500 tons aluminum oxide in 1200 ℃ of high-temperature roastings.
Following table 1 to 4 has provided in actual production process, the contrast of different performance index when using milk of lime and power plant of the present invention dead meal to make flocculating aids respectively.
By table 1,2 and 3 as can be seen, though use different flocculating aidss little to the influence of the technical parameter in the technology of fine filtering, each constituent content difference is also little in the sodium aluminate concentrate solution that obtains after the filtration, the alumina product quality index difference that finally obtains is also not too big, but table 4 has clearly provided the economic target of correspondence when using different flocculating aids, table can intuitively be found out when using power plant of the present invention dead meal to make flocculating aids thus, steam, water power year, consumption obviously reduced, the annual production of aluminum oxide also obviously improves, brought remarkable economic efficiency and energy-saving and emission-reduction, be worthy of popularization.
It should be noted that at last: above embodiment is only in order to explanation, and unrestricted technical scheme of the present invention, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that, still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
1. power plant's dead meal replacing lime breast is used for the technology of alumina producing Bayer process, comprise that red mud separates and the fine filtering operation, it is characterized in that, separate at red mud and to add flocculating aids in the gained crude liquor of sodium aluminate of back and carry out the fine filtering operation, described flocculating aids is by power plant desulfurization lime-ash, the electricity mixture that ashes and boiler ash form that gathers dust.
2. power plant's dead meal replacing lime breast is used for the technology of alumina producing Bayer process according to claim 1, it is characterized in that, gather dust ashes and boiler ash of described power plant desulfurization lime-ash, electricity mixes by mass ratio 1～3:2～7:3～10, and addition is 1 of crude liquor of sodium aluminate weight～5 ‰.
3. be used for the technology of alumina producing Bayer process as power plant's dead meal replacing lime breast as described in the claim 2, it is characterized in that, gather dust ashes and boiler ash of described power plant desulfurization lime-ash, electricity mixes by mass ratio 1～2:2～5:3～7.
As claim 1 to 3 arbitrary as described in power plant's dead meal replacing lime breast be used for the technology of alumina producing Bayer process, it is characterized in that this method comprises the steps:
1. raw material stripping: the ore charging feed mill wet method that fragmentation is good grinds, and makes qualified ore pulp and send the stripping operation; 2. red mud separates: the ore pulp stripping is after dilution enters the red mud separation circuit;
3. fine filtering: the separating obtained crude liquor of sodium aluminate of red mud enters leaf filter, does at power plant's dead meal to filter under the condition of flocculating aids, obtains sodium aluminate concentrate solution after the filtration; Wherein, described power plant dead meal is power plant desulfurization lime-ash, electricity ashes and the boiler ash mixture after by mass ratio 1～3:2～7:3～10 mixings that gathers dust, and the addition of flocculating aids is 1 of crude liquor of sodium aluminate weight～5 ‰;
4. prepare aluminum oxide: the gained sodium aluminate concentrate solution is mixed with aluminium hydroxide crystal seed after the interchanger cooling, through being pumped to the first groove of decomposer, interchanger cooling on decomposer, reduction gradually along with temperature, there is a large amount of aluminium hydroxide to separate out and grow up, deliver to by discharging pump again that filter the square position, washing, by belt aqueous aluminium-hydroxide powder is delivered to stoving oven and carry out roasting and obtain aluminum oxide.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101340878A CN102259904B (en) | 2011-05-24 | 2011-05-24 | Bayer process for producing alumina by using waste material in power plant instead of lime milk |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101340878A CN102259904B (en) | 2011-05-24 | 2011-05-24 | Bayer process for producing alumina by using waste material in power plant instead of lime milk |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102716616A (en) * | 2012-06-21 | 2012-10-10 | 中国铝业股份有限公司 | Filter aid used in leaf filtering process of sodium aluminate solution |
| CN102951666A (en) * | 2012-11-29 | 2013-03-06 | 中国铝业股份有限公司 | Crude-liquid filtering and refining method by Bayer process |
| CN106732324A (en) * | 2016-12-03 | 2017-05-31 | 湖南诺兰蒂尔环保科技有限公司 | It is a kind of for the filter aid of fine filtration of sodium aluminate solution and its production and application method |
| CN115403014A (en) * | 2022-08-23 | 2022-11-29 | 深圳市中金岭南有色金属股份有限公司丹霞冶炼厂 | Sulfur melting method for improving mining and metallurgy sulfur grade |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0388108A2 (en) * | 1989-03-13 | 1990-09-19 | Ciba Specialty Chemicals Water Treatments Limited | Treatment of bayer process wastes |
| CN101085679A (en) * | 2006-06-06 | 2007-12-12 | 张克嶷 | Method for extracting aluminum oxide from fly ash and coproducing cement by carbide slag or cyanamide slag |
| CN101708859A (en) * | 2009-12-02 | 2010-05-19 | 贾启 | Process for Bayer process aluminum oxide production by replacing carbide slag with lime |
-
2011
- 2011-05-24 CN CN2011101340878A patent/CN102259904B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0388108A2 (en) * | 1989-03-13 | 1990-09-19 | Ciba Specialty Chemicals Water Treatments Limited | Treatment of bayer process wastes |
| CN101085679A (en) * | 2006-06-06 | 2007-12-12 | 张克嶷 | Method for extracting aluminum oxide from fly ash and coproducing cement by carbide slag or cyanamide slag |
| CN101708859A (en) * | 2009-12-02 | 2010-05-19 | 贾启 | Process for Bayer process aluminum oxide production by replacing carbide slag with lime |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102716616A (en) * | 2012-06-21 | 2012-10-10 | 中国铝业股份有限公司 | Filter aid used in leaf filtering process of sodium aluminate solution |
| CN102951666A (en) * | 2012-11-29 | 2013-03-06 | 中国铝业股份有限公司 | Crude-liquid filtering and refining method by Bayer process |
| CN106732324A (en) * | 2016-12-03 | 2017-05-31 | 湖南诺兰蒂尔环保科技有限公司 | It is a kind of for the filter aid of fine filtration of sodium aluminate solution and its production and application method |
| CN106732324B (en) * | 2016-12-03 | 2019-10-29 | 湖南诺兰蒂尔环保科技有限公司 | It is a kind of for the filter aid of fine filtration of sodium aluminate solution and its production and application method |
| CN115403014A (en) * | 2022-08-23 | 2022-11-29 | 深圳市中金岭南有色金属股份有限公司丹霞冶炼厂 | Sulfur melting method for improving mining and metallurgy sulfur grade |
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| Publication number | Publication date |
|---|---|
| CN102259904B (en) | 2013-08-28 |
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Effective date of registration: 20190612 Address after: 472400 Tiantan Industrial Zone, Mianchi County, Sanmenxia City, Henan Province Patentee after: East Hope (Sanmenxia) Aluminum Co., Ltd. Address before: 472400 Dongfang Hope (Sanmenxia) Aluminum Industry Co., Ltd., Tiantan Industrial Park, Mianchi County, Sanmenxia City, Henan Province Patentee before: Pan Guanghe |