CN101264915A - Technique for producing aluminum fluoride by dry method - Google Patents
Technique for producing aluminum fluoride by dry method Download PDFInfo
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- CN101264915A CN101264915A CNA2008100495831A CN200810049583A CN101264915A CN 101264915 A CN101264915 A CN 101264915A CN A2008100495831 A CNA2008100495831 A CN A2008100495831A CN 200810049583 A CN200810049583 A CN 200810049583A CN 101264915 A CN101264915 A CN 101264915A
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- aluminum fluoride
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Abstract
The invention relates to a production process of dry method aluminum fluoride, which comprises the steps like preparation of HF gas, and the preparation of aluminum fluoride by means of HF and aluminum hydroxide; wherein, the preparation method for HF gas comprises the following step: concentrated sulphuric acid and nicotinic acid are added into a fuming acid reaction kettle and mixed, and the mixed acid obtained from the mixing adequately reacts with fluorite directly in a reaction furnace, so as to acquire HF gas. By obviating the steps of sulphuric acid preheating and pre-reactor reaction, the production process of dry method aluminum fluoride has the advantages of preventing a variety of problems due to the improper control of the reaction parameters in the pre-reactor, improving the running rate of equipment, saving the equipment maintenance costs and investments, lowering the labor intensity for workers, as well as bettering the production capacity of the overall process to approximately 25 thousand tons due to the absence of restriction of the two steps obviated.
Description
(1) technical field
The present invention relates to a kind of production technique of aluminum fluoride by dry process.
(2) background technology
Traditional aluminum fluoride by dry process production technique is that 98 acid (98% vitriol oil) and 105 acid (oleum) through the interchanger preheating are added the oleum reactor, the mixing acid that obtains enters pre-reactor, simultaneously the fluorite material is also added pre-reactor, mixing acid and fluorite hybrid concurrency are given birth to initial reaction, material after the pre-reaction enters Reaktionsofen and reacts fully, described Reaktionsofen adopts rotary kiln, the bull gear of Reaktionsofen and backing ring are in the middle part of big stove, the hot-air system of big stove is divided into three sections, six hot blast trims, the hot-air system that adopts is three to advance four and go out form, the solid residue CaSO of generation
4Discharge by the deslagging spiral, the HF of generation enters fluidized-bed from the fluidized-bed bottom after purifying, and aluminium hydroxide enters fluidized-bed from fluidized-bed top, and aluminium hydroxide and HF gas react under suitable temperature and generates AlF
3And water (H
2O).Coarse grained AlF
3Material enters cooler by load displacing screw, thin AlF
3Material and tail gas enter one-level cyclone dust collection, one-level gather dust a fines part enter fluidized bed at the bottom of the returning charge spiral return fluidized-bed, a part enter cooler through the whirlwind load displacing screw.Remaining fines and tail gas enter secondary cyclone dust collection from the one-level top of gathering dust, secondary gather dust fines enter cooler through the whirlwind load displacing screw, tail gas emptying after the washing of tail gas absorption system.Through the cooled AlF of cooler
3Material promptly is a finished product.Fig. 1 is seen in technical process.
The throughput of above technology is approximately 1.5 ten thousand tons, wherein because mixing acid and fluorite will pre-reactions in pre-reactor, if stuck phenomenon the pre-reactor job insecurity just appears, easily in sulfuric acid and the fluorite proportioning is improper, steam is unstable or misoperation easily; Simultaneously, pre-reactor needed stop production to overhaul once in 3 months because the strand leaf weares and teares, seriously corroded, and the maintenance cost height, has brought great inconvenience to production at about 3 days/time of servicing time.
(3) summary of the invention
The object of the present invention is to provide a kind of production technique of new aluminum fluoride by dry process, solved, also solved the influence that pre-reactor causes production because of maintenance simultaneously by the improper variety of issue that brings of reaction parameter control in the pre-reactor.
The technical solution used in the present invention is as follows:
A kind of production technique of aluminum fluoride by dry process, the preparation, HF and the preparation of aluminium hydroxide aluminum fluoride that comprise HF gas, wherein in the preparation technology of HF gas the vitriol oil and nicotinic acid normal temperature are added the fuming acid reactor, the mixing acid that obtains after the mixing directly fully reacts in Reaktionsofen with fluorite and obtains HF gas.
Adopt after this technology, removed the pre-reaction step of vitriolic pre-heating step in the former technology and mixing acid and fluorite, only need that sulfuric acid and nicotinic acid are mixed the back at normal temperature and directly add fluorite in Reaktionsofen and the adding Reaktionsofen and react and get final product.Above technology is omitted the pre-reaction technology that is easy to generate problem, reduced of the restriction of this link simultaneously to throughput, throughput can enlarge 50-70%, corresponding investment of also having saved sulfuric acid preheater and pre-reactor, getting final product and the adding of fluorite only need increase a general conveyor screw, can reduce investment outlay about 5,500,000 yuan in the equipment aspect.Preferably, also can assist mixing acid is added acid tube and airway to carry out some and improve and go up, make the HF gas of preparing meet the requirement of subsequent technique to reduce the inclusion in the HF gas of preparing as far as possible.
More than make and the HF gas after purifying enters fluidized-bed from the fluidized-bed bottom; The solid residue CaSO that reaction generates
4A part is returned kiln hood from the kiln tail, and a part is discharged by the deslagging spiral.
The technology that aluminium hydroxide and HF prepare aluminum fluoride is as follows: aluminium hydroxide enters fluidized-bed from fluidized-bed top, reacts under suitable temperature with the HF gas that enters fluidized-bed from the bottom to generate AlF
3And water (H
2O).Coarse grained AlF
3Material enters cooler by load displacing screw, thin AlF
3Material and tail gas enter one-level cyclone dust collection, one-level gather dust a fines part enter fluidized bed at the bottom of the returning charge spiral return fluidized-bed, a part enter cooler through the whirlwind load displacing screw.Remaining fines and tail gas enter secondary cyclone dust collection from the one-level top of gathering dust, secondary gather dust fines enter cooler through the whirlwind load displacing screw, tail gas emptying after the washing of tail gas absorption system.Through the cooled AlF of cooler
3Material promptly is a finished product, sends to packing, sells.
In addition, the present invention has also changed the method for using the reacting in rotary kiln stove in the traditional technology, and then anti-slag hearth in using, and supporting hot-air system employing three is advanced one and gone out form, and thermosteresis is few, the thermo-efficiency height, and this can further enlarge the throughput of this technology.
The present invention has following advantage with respect to prior art:
The present invention is owing to saved the sulfuric acid preheating and the step of pre-reactor reaction, thereby avoided the improper and variety of issue that brings of reaction parameter control in the pre-reactor, improved operation rate, maintenance of equipment expense and investment have been saved, also reduced worker's labour intensity, owing to lacked the restriction of two links, the throughput of whole technology is improved, and can be promoted to about 2.5 ten thousand tons substantially simultaneously.
(4) description of drawings
Fig. 1 is traditional aluminum fluoride by dry process technological process of production figure;
Fig. 2 is the aluminum fluoride by dry process technological process of production figure among the embodiment.
(4) embodiment:
Below with specific embodiment technical scheme of the present invention is described, but protection scope of the present invention is not limited thereto:
Embodiment 1
The aluminum fluoride by dry process production technique is that the nicotinic acid normal temperature of 98% the vitriol oil and 105% adds the fuming acid reactor with mass concentration, the mixing acid that obtains after the mixing again with fluorite directly in Reaktionsofen fully reaction obtain HF gas.HF gas enters fluidized-bed from the fluidized-bed bottom after purifying; The solid residue CaSO that reaction generates
4A part is returned kiln hood from the kiln tail, and a part is discharged by the deslagging spiral.Aluminium hydroxide enters fluidized-bed from fluidized-bed top, generates AlF with the HF gas reaction that enters fluidized-bed from the bottom
3And water.Coarse grained AlF
3Material enters cooler by load displacing screw, thin AlF
3Material and tail gas enter one-level cyclone dust collection, one-level gather dust a fines part enter fluidized bed at the bottom of the returning charge spiral return fluidized-bed, a part enter cooler through the whirlwind load displacing screw.Remaining fines and tail gas enter secondary cyclone dust collection from the one-level top of gathering dust, secondary gather dust fines enter cooler through the whirlwind load displacing screw, tail gas emptying after the washing of tail gas absorption system.Through the cooled AlF of cooler
3Material promptly is a finished product, sends to packing.
Claims (1)
1. the production technique of an aluminum fluoride by dry process, the preparation, HF and the preparation of aluminium hydroxide aluminum fluoride that comprise HF gas, it is characterized in that, the preparation method of HF gas is: the vitriol oil and nicotinic acid normal temperature are added the fuming acid reactor, and the mixing acid that obtains after the mixing directly fully reacts in Reaktionsofen with fluorite and obtains HF gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100495831A CN101264915A (en) | 2008-04-21 | 2008-04-21 | Technique for producing aluminum fluoride by dry method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100495831A CN101264915A (en) | 2008-04-21 | 2008-04-21 | Technique for producing aluminum fluoride by dry method |
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| Publication Number | Publication Date |
|---|---|
| CN101264915A true CN101264915A (en) | 2008-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA2008100495831A Pending CN101264915A (en) | 2008-04-21 | 2008-04-21 | Technique for producing aluminum fluoride by dry method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211784A (en) * | 2011-05-19 | 2011-10-12 | 山东昭和新材料科技股份有限公司 | Method for producing low silicon dry-method aluminum fluoride by using high silicon flousper powder |
| CN102515203A (en) * | 2011-11-16 | 2012-06-27 | 多氟多化工股份有限公司 | Processing method of wastes produced when battery grade lithium fluoride is manufactured by adopting carbonization method |
| CN102992370A (en) * | 2011-09-14 | 2013-03-27 | 山东博丰利众化工有限公司 | High-purity aluminum fluoride production technology |
| CN108840358A (en) * | 2018-09-13 | 2018-11-20 | 衢州市鼎盛化工科技有限公司 | A kind of devices and methods therefor preparing aluminum fouoride |
| CN112777621A (en) * | 2020-12-30 | 2021-05-11 | 淄博华士元环保科技有限公司 | Method for preparing aluminum fluoride by recycling fluorine-containing waste |
-
2008
- 2008-04-21 CN CNA2008100495831A patent/CN101264915A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102211784A (en) * | 2011-05-19 | 2011-10-12 | 山东昭和新材料科技股份有限公司 | Method for producing low silicon dry-method aluminum fluoride by using high silicon flousper powder |
| CN102211784B (en) * | 2011-05-19 | 2013-06-19 | 山东昭和新材料科技股份有限公司 | Method for producing low silicon dry-method aluminum fluoride by using high silicon flousper powder |
| CN102992370A (en) * | 2011-09-14 | 2013-03-27 | 山东博丰利众化工有限公司 | High-purity aluminum fluoride production technology |
| CN102992370B (en) * | 2011-09-14 | 2014-09-10 | 山东博丰利众化工有限公司 | High-purity aluminum fluoride production technology |
| CN102515203A (en) * | 2011-11-16 | 2012-06-27 | 多氟多化工股份有限公司 | Processing method of wastes produced when battery grade lithium fluoride is manufactured by adopting carbonization method |
| CN102515203B (en) * | 2011-11-16 | 2013-12-11 | 多氟多化工股份有限公司 | Processing method of wastes produced when battery grade lithium fluoride is manufactured by adopting carbonization method |
| CN108840358A (en) * | 2018-09-13 | 2018-11-20 | 衢州市鼎盛化工科技有限公司 | A kind of devices and methods therefor preparing aluminum fouoride |
| CN112777621A (en) * | 2020-12-30 | 2021-05-11 | 淄博华士元环保科技有限公司 | Method for preparing aluminum fluoride by recycling fluorine-containing waste |
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Open date: 20080917 |