CN102815735A - New process for directly producing poly aluminum chloride by using bauxite - Google Patents
New process for directly producing poly aluminum chloride by using bauxite Download PDFInfo
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- CN102815735A CN102815735A CN2012102870359A CN201210287035A CN102815735A CN 102815735 A CN102815735 A CN 102815735A CN 2012102870359 A CN2012102870359 A CN 2012102870359A CN 201210287035 A CN201210287035 A CN 201210287035A CN 102815735 A CN102815735 A CN 102815735A
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- bauxite
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- aluminium chloride
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Abstract
The invention relates to a new process for directly producing poly aluminum chloride by using bauxite. The process comprises the following steps: carrying out a pressurized stirring reaction of bauxite and hydrochloric acid in an acid resistance and pressure resistance reactor to obtain an aluminum trichloride reaction liquid; adding the aluminum trichloride reaction liquid into an underground pool; adding calcium aluminate powder to carry out a polymerization reaction; adjusting basicity; carrying out filter pressing through a plate-and-frame filter press; and carrying out drying on the resulting filtrate through a roller or a spraying device to obtain the solid poly aluminum chloride product. According to the present invention, the pressurized reaction of the bauxite is directly adopted, and the calcined bauxite is not used, such that energy source is substantially saved, energy consumption cost is reduced, a technology process is shortened, labor intensity is reduced, and the poly aluminum chloride reaction is not limited by the ore source; with the pressurized reaction, a dissolution rate of the bauxite is more than 95%, and is much higher than a dissolution rate of 90% of the calcined bauxite, such that the resources are efficiently used, and are saved, generation amount of the unit product bauxite residue is reduced, and influence on the environment is reduced.
Description
Technical field
The present invention relates to chemical technology field, particularly a kind of novel process with bauxite direct production poly aluminium chloride.
Background technology
Poly aluminium chloride is called for short and gathers aluminium, english name PAC; Be the cationic inorganic polymer flocculant of a kind of poly-hydroxy, multinuclear complexing body, the solid phase prod outward appearance is yellow or white solid powder, and soluble in water; Stronger bridge formation adsorptivity is arranged; In hydrolytic process, follow physicsization such as electrochemistry, cohesion, absorption and deposition and change, finally generate AL
2(OH)
3Thereby, reach the purification purpose.
The production of solid poly aluminium chloride now, the domestic white lake pressurization that all adopts is broken essence after after 800 ℃ of high-temperature calcinations of rotary kiln with bauxite; Wear into 80 order bauxite powders, in reaction tank, add water and add acid, treat that temperature is raised to 100 ℃ after; Keeping the reaction times is 4～6 hours, adds the calcium aluminate powder reaction and regulates basicity to 40～95% in 1.5～2.5 hours, again through the plate-and-frame filter press press filtration; To filtrate and carry out drying, obtain solid poly aluminium chloride product through cylinder or spray tower.Because raw material adopts light-burned material; Must be with alum clay through 800 ℃ of high-temperature calcinations of rotary kiln; Both waste the energy, polluted environment again, also increased unnecessary labour intensity; Limited the raw material supply (dependence of raw material height) of poly aluminium chloride, and the solubility rate of light-burned material and hydrochloric acid reaction low (having only about 90%).
Summary of the invention
The objective of the invention is to overcome the above-mentioned deficiency of prior art, and a kind of novel process with bauxite direct production poly aluminium chloride is provided.
Technical scheme of the present invention is: a kind of novel process with bauxite direct production poly aluminium chloride, and its process step is following:
One, acidleach compressive reaction: bauxite is worn into bauxite powder and the water that 60 orders 80% pass through adds in the withstand voltage acid tolerance response pot, drop into concentrated hydrochloric acid, boost to 0.3～0.5MPa and carry out compressive reaction, the aluminum chloride reaction solution;
Two, polyreaction: above-mentioned aluminum chloride reaction solution is inserted in the low level reactor, add calcium aluminate powder and carry out polyreaction, and regulate basicity;
Three, slag liquid separates: will regulate reaction solution behind the basicity through the plate-and-frame filter press press filtration, the collection filtered liq;
Four, drying: filtered liq is carried out drying through cylinder or spray tower, obtain solid poly aluminium chloride product.
The further technical scheme of the present invention is: the temperature of acidleach compressive reaction is 110～130 ℃.
The further again technical scheme of the present invention is: the time of acidleach compressive reaction is 4～5 hours.
The present invention does not re-use the bauxite powder of roasting owing to the bauxite powder compressive reaction that directly uses bauxite to wear into, and has practiced thrift the energy greatly; Reduced energy consumption cost; Shortened technical process, reduced labour intensity, made and gather the restriction that reactive aluminum no longer receives mineral resources; Simultaneously, through compressive reaction, the solubility rate of bauxite is up to more than 95%; Be much higher than 90% solubility rate of bauxite after the roasting, make resource be used more effectively, economize on resources; Reduce the scoriaceous generation of unit product alum clay, alleviated influence environment.
Below in conjunction with embodiment detailed content of the present invention is further described.
Embodiment
Embodiment one:
A kind of novel process with bauxite direct production poly aluminium chloride, its process step is following: 0.8 ton of water is placed 5M
3Withstand voltage acid tolerance response pot in, then with 1.2 tons of alumina content Al
2O
3The bauxite powder that>=37wt.%, fineness 60 orders 80% sieve adds in the reactor, begins to stir, and 60 rev/mins of stirring velocitys add 2.4M again in reactor
330% hydrochloric acid, envelope press feeding steam to begin reaction, are warming up to 120 ℃; Boost to 0.40MPa, keep reacting 4.5 hours, reaction solution is put into the ground lower storage reservoir to the back pressure release that reacts completely; Add 0.6 ton of calcium aluminate powder, regulate basicity to 70% reaction 2 hours, through Plate Filtration slag liquid is separated again; Filtered liq obtains solid poly aluminium chloride product through cylinder or spraying drying.
Embodiment two:
A kind of novel process with bauxite direct production poly aluminium chloride, its process step is following: 0.8 ton of water is placed 5M
3Withstand voltage acid tolerance response pot in, then with 1.2 tons of alumina content Al
2O
3The bauxite powder that>=37wt.%, fineness 60 orders 80% sieve adds in the reactor, begins to stir, and 60 rev/mins of stirring velocitys add 2.4M again in reactor
330% hydrochloric acid, envelope press feeding steam to begin reaction, are warming up to 110 ℃; Boost to 0.30MPa, keep reacting 4 hours, reaction solution is put into the ground lower storage reservoir to the back pressure release that reacts completely; Add 0.46 ton of calcium aluminate powder, regulate basicity to 50% reaction 1.5 hours, through Plate Filtration slag liquid is separated again; Filtered liq obtains solid poly aluminium chloride product through cylinder or spraying drying.
Embodiment three:
A kind of novel process with bauxite direct production poly aluminium chloride, its process step is following: 0.8 ton of water is placed 5M
3Withstand voltage acid tolerance response pot in, then with 1.2 tons of alumina content Al
2O
3The bauxite powder that>=37wt.%, fineness 60 orders 80% sieve adds in the reactor, begins to stir, and 60 rev/mins of stirring velocitys add 2.4M again in reactor
330% hydrochloric acid, envelope press feeding steam to begin reaction, are warming up to 130 ℃; Boost to 0.50MPa, keep reacting 5 hours, reaction solution is put into the ground lower storage reservoir to the back pressure release that reacts completely; Add 1.2 tons of calcium aluminate powders, regulate basicity to 95% reaction 2.5 hours, through Plate Filtration slag liquid is separated again; Filtered liq obtains solid poly aluminium chloride product through cylinder or spraying drying.
Claims (3)
1. novel process with bauxite direct production poly aluminium chloride is characterized in that its process step is following:
One, acidleach compressive reaction: bauxite is worn into bauxite powder and the water that 60 orders 80% pass through adds in the withstand voltage acid tolerance response pot, drop into concentrated hydrochloric acid, boost to 0.3～0.5MPa and carry out compressive reaction, the aluminum chloride reaction solution;
Two, polyreaction: above-mentioned aluminum chloride reaction solution is inserted in the low level reactor, add calcium aluminate powder and carry out polyreaction, and regulate basicity;
Three, slag liquid separates: will regulate reaction solution behind the basicity through the plate-and-frame filter press press filtration, the collection filtered liq;
Four, drying: filtered liq is carried out drying through cylinder or spray tower, obtain solid poly aluminium chloride product.
2. the novel process with bauxite direct production poly aluminium chloride according to claim 1, the temperature that it is characterized in that the acidleach compressive reaction is 110～130 ℃.
3. the novel process with bauxite direct production poly aluminium chloride according to claim 1 and 2, the time that it is characterized in that the acidleach compressive reaction is 4～5 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210287035.9A CN102815735B (en) | 2012-08-14 | 2012-08-14 | A kind of novel process of bauxite direct production poly aluminium chloride |
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| CN201210287035.9A CN102815735B (en) | 2012-08-14 | 2012-08-14 | A kind of novel process of bauxite direct production poly aluminium chloride |
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| CN102815735A true CN102815735A (en) | 2012-12-12 |
| CN102815735B CN102815735B (en) | 2015-08-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103738992A (en) * | 2014-01-23 | 2014-04-23 | 天津市水洁净水材料有限公司 | Preparation technology of efficient polymeric aluminum chloride for wastewater treatment |
| CN104211147A (en) * | 2014-08-13 | 2014-12-17 | 河南鼎鑫冶金科技有限公司 | Water treatment clarification disinfectant and preparation method thereof |
| CN113955806A (en) * | 2021-03-12 | 2022-01-21 | 衡阳市建衡实业有限公司 | Production method of polyaluminum ferric chloride |
| CN116040670A (en) * | 2023-03-31 | 2023-05-02 | 内蒙古蒙泰集团有限公司 | Method for producing polyaluminum chloride in process of preparing aluminum silicon oxide from fly ash |
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| CN87103009A (en) * | 1987-05-06 | 1987-09-30 | 德阳市孝泉化工厂 | The production method of poly aluminum chloride compound |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103738992A (en) * | 2014-01-23 | 2014-04-23 | 天津市水洁净水材料有限公司 | Preparation technology of efficient polymeric aluminum chloride for wastewater treatment |
| CN104211147A (en) * | 2014-08-13 | 2014-12-17 | 河南鼎鑫冶金科技有限公司 | Water treatment clarification disinfectant and preparation method thereof |
| CN104211147B (en) * | 2014-08-13 | 2016-04-20 | 河南鼎鑫冶金科技有限公司 | Water treatment clarification disinfecting agent and preparation method thereof |
| CN113955806A (en) * | 2021-03-12 | 2022-01-21 | 衡阳市建衡实业有限公司 | Production method of polyaluminum ferric chloride |
| CN113955806B (en) * | 2021-03-12 | 2023-08-01 | 衡阳市建衡实业有限公司 | Production method of polyaluminum ferric chloride |
| CN116040670A (en) * | 2023-03-31 | 2023-05-02 | 内蒙古蒙泰集团有限公司 | Method for producing polyaluminum chloride in process of preparing aluminum silicon oxide from fly ash |
| CN116040670B (en) * | 2023-03-31 | 2023-08-08 | 内蒙古蒙泰集团有限公司 | Method for producing polyaluminum chloride in process of preparing aluminum silicon oxide from fly ash |
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|---|---|
| CN102815735B (en) | 2015-08-26 |
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