CN1830794A - Production method of aluminium fluoride - Google Patents
Production method of aluminium fluoride Download PDFInfo
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- CN1830794A CN1830794A CN 200510017403 CN200510017403A CN1830794A CN 1830794 A CN1830794 A CN 1830794A CN 200510017403 CN200510017403 CN 200510017403 CN 200510017403 A CN200510017403 A CN 200510017403A CN 1830794 A CN1830794 A CN 1830794A
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- kaolinite
- aluminum fluoride
- production method
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- fluoride
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Abstract
A process for preparing aluminum fluoride from kaolinite and hydrofluoric acid includes such steps as pulverizing kaolinite, reaction between sulfuric acid solution and said kaolinite, filtering to obtain aluminum sulfate solution, reacting on dyrofluoric acid, crystallizing, filtering, washing and drying. It has low cost.
Description
Technical field
The present invention relates to a kind of is the method that raw material is produced aluminum fluoride with kaolinite and hydrofluoric acid.
Background technology
Aluminum fluoride is used as auxiliary agent in Aluminum Electrolysis Production, be used to reduce electrolytical fusing point, improve electrolytical electric conductivity.Wet method that its traditional processing technology is a hydrofluoric acid---dry method and hydrofluoric acid---.The raw material of hydrofluoric acid---dry process is hydrogen fluoride and aluminium hydroxide, its production technique is for comprising that aluminium hydroxide is carried out pre-treatment removes crystal water, then with powdery and hydrogen fluoride gas and 500-600 ℃ of thorough mixing reaction, generate aluminum trifluoride at reactor bottom, with aluminum trifluoride send into rotary drum cool off finished product.The raw material of hydrofluoric acid---wet processing is hydrofluoric acid and aluminium hydroxide, and production technique is that hydrofluoric acid and aluminum hydroxide slime react, crystallization, gets aluminum fluoride trihydrate, and drying dehydration again makes aluminium fluoride product.Above-mentioned production technique cost of material height, the production cost height; The dry process facility investment is big, complex process.
Summary of the invention
The object of the invention is to provide a kind of production method of aluminum fluoride, to reduce production costs, reduces facility investment.
To achieve these goals, technical program of the present invention lies in adopting a kind of production method of aluminum fluoride, with kaolinite and hydrofluoric acid is raw material, kaolinite is crushed to the 100-200 order, with concentration is that the 200-300g/l sulphuric acid soln reacts with kaolinite in the compressive reaction still, temperature of reaction 130-150 ℃, reaction times 1-2 hour; After reaction finishes, filter and obtain alum liquor; With alum liquor and hydrofluoric acid reactive crystallization, Tc 130-160 ℃, after crystallization was finished, filtration washing obtained the aluminum fluoride less than a crystal water, and drying dehydration again makes aluminium fluoride product.
The alumina weight percentage composition is 35%-50% in the described kaolinite.
Aluminium composition is 35-60g/l in the described Tai-Ace S 150.
Reaction formula of the present invention is:
The main raw material of the aluminum fluoride that production method is produced of aluminum fluoride of the present invention is a kaolinite, has substituted aluminium hydroxide, abundant, the exploitation easily of China's kaolinite reserves, and price is well below aluminium hydroxide.Method of the present invention can reduce cost 1000～1200 yuan/ton than traditional method.Aluminum fluoride crystallization in the environment below 100 ℃, the crystallisate that obtains are the aluminum fluorides that contains three crystal water, and its crystal water content is 40%, and total water content of aluminum fluoride ointment is 55-60%, and dried aluminum fluoride unit weight is 0.8g/cm
3Below.Aluminum fluoride crystallization in 140-160 ℃ hot environment can obtain the aluminum fluoride less than a crystal water in the method for the present invention, and its crystal water content is 10%, and total water content of aluminum fluoride ointment is 30-35%, and dried aluminum fluoride unit weight is 1.0g/cm
3More than.Because the crystal water of the aluminum fluoride ointment that this method is produced and total water content significantly reduce, the drying and dehydrating of aluminum fluoride is very easy to, and the exsiccant energy consumption reduces.The aluminum fluoride unit weight that this method is produced obviously improves, near conventional dry aluminum fluoride 1.2-1.3g/cm
3Unit weight, physicals is improved.
The aluminum fluoride finished product of producing with this method is through chemical examination, quality product be up to state standards (GB/T4292---1999).
| Chemical index | F | Al | Na | SiO 2 | Fe 2O 3 | SO 4 2- | P 2O 5 |
| The aluminium fluoride product of the present invention's preparation | 63 | 32 | 0.1 | 0.01 | 0.03 | 0.3 | 0.01 |
| Special one-level | ≥61.0 | ≥30.0 | ≤0.5 | ≤0.28 | ≤0.10 | ≤0.5 | ≤0.04 |
| Special secondary | ≥60.0 | ≥30.0 | ≤0.5 | ≤0.30 | ≤0.13 | ≤0.8 | ≤0.04 |
| One-level | ≥58.0 | ≥28.2 | ≤3.0 | ≤0.30 | ≤0.13 | ≤1.1 | ≤0.04 |
| Secondary | ≥57.0 | ≥28.0 | ≤3.5 | ≤0.35 | ≤0.15 | ≤1.2 | ≤0.04 |
Embodiment
Embodiment 1
The production method of aluminum fluoride is as follows in the present embodiment: the mother liquor dilute sulphuric acid and the vitriol oil are mixed with the sulphuric acid soln that concentration is 200g/l, react 135 ℃ of temperature of reaction, 1 hour reaction times with kaolinite in the compressive reaction still; After reaction finishes, filter and obtain the alum liquor that aluminium composition is 42g/l; With alum liquor and hydrofluoric acid reactive crystallization, 140 ℃ of Tcs, after crystallization was finished, filtration washing obtained the aluminum fluoride less than a crystal water, and drying dehydration again makes aluminium fluoride product, and the mother liquor dilute sulphuric acid returns use.
Embodiment 2
The production method of the aluminum fluoride of present embodiment is as follows: the mother liquor dilute sulphuric acid and the vitriol oil are mixed with the sulphuric acid soln that concentration is 250g/l, react 140 ℃ of temperature of reaction, 1.5 hours reaction times with kaolinite in the compressive reaction still; After reaction finishes, filter and obtain the alum liquor that aluminium composition is 55g/l; With alum liquor and hydrofluoric acid reactive crystallization, 150 ℃ of Tcs, after crystallization was finished, filtration washing obtained the aluminum fluoride less than a crystal water, and drying dehydration again makes aluminium fluoride product, and the mother liquor dilute sulphuric acid returns use.
Embodiment 3
The production method of the aluminum fluoride of present embodiment is as follows: the mother liquor dilute sulphuric acid and the vitriol oil are mixed with the sulphuric acid soln that concentration is 300g/l, react 145 ℃ of temperature of reaction, 2 hours reaction times with kaolinite in the compressive reaction still; After reaction finishes, filter and obtain the alum liquor that aluminium composition is 60g/l; With alum liquor and hydrofluoric acid reactive crystallization, 160 ℃ of Tcs, after crystallization was finished, filtration washing obtained the aluminum fluoride less than a crystal water, and drying dehydration again makes aluminium fluoride product, and the mother liquor dilute sulphuric acid returns use.
It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, 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 (3)
1, a kind of production method of aluminum fluoride, it is characterized in that: with kaolinite and hydrofluoric acid is raw material, and kaolinite is crushed to the 100-200 order, is that the 200-300g/l sulphuric acid soln reacts with kaolinite in the compressive reaction still with concentration, temperature of reaction 130-150 ℃, reaction times 1-2 hour; After reaction finishes, filter and obtain alum liquor; With alum liquor and hydrofluoric acid reactive crystallization, Tc 130-160 ℃, after crystallization was finished, filtration washing obtained the aluminum fluoride less than a crystal water, and drying dehydration again makes aluminium fluoride product.
2, the production method of aluminum fluoride according to claim 1 is characterized in that: the alumina weight percentage composition is 35%-50% in the described kaolinite.
3, the production method of aluminum fluoride according to claim 1 is characterized in that: aluminium composition is 35-60g/l in the described Tai-Ace S 150.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100174038A CN100360413C (en) | 2005-03-07 | 2005-03-07 | Production method of aluminium fluoride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100174038A CN100360413C (en) | 2005-03-07 | 2005-03-07 | Production method of aluminium fluoride |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1830794A true CN1830794A (en) | 2006-09-13 |
| CN100360413C CN100360413C (en) | 2008-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100174038A Expired - Fee Related CN100360413C (en) | 2005-03-07 | 2005-03-07 | Production method of aluminium fluoride |
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| CN (1) | CN100360413C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112520770A (en) * | 2020-12-17 | 2021-03-19 | 河南中色东方韶星实业有限公司 | Comprehensive utilization method of atmospheric condensate |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1048959C (en) * | 1994-08-06 | 2000-02-02 | 温宝礼 | Method for producing aluminium fluoride and cryolite with kaoline |
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2005
- 2005-03-07 CN CNB2005100174038A patent/CN100360413C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112520770A (en) * | 2020-12-17 | 2021-03-19 | 河南中色东方韶星实业有限公司 | Comprehensive utilization method of atmospheric condensate |
| CN112520770B (en) * | 2020-12-17 | 2023-04-07 | 河南东方韶星实业有限公司 | Comprehensive utilization method of atmospheric condensate |
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| Publication number | Publication date |
|---|---|
| CN100360413C (en) | 2008-01-09 |
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Granted publication date: 20080109 Termination date: 20120307 |