CN1314592C - Cryolite production method - Google Patents
Cryolite production method Download PDFInfo
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- CN1314592C CN1314592C CNB2004100604718A CN200410060471A CN1314592C CN 1314592 C CN1314592 C CN 1314592C CN B2004100604718 A CNB2004100604718 A CN B2004100604718A CN 200410060471 A CN200410060471 A CN 200410060471A CN 1314592 C CN1314592 C CN 1314592C
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- cryolite
- ammonium
- industrial salt
- saturated solution
- fluoroaluminate
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Abstract
The present invention discloses a method for producing cryolite, which comprises the following steps: using ammonium fluoaluminate and industrial salt as raw materials to react in solid phases, and preparing the industrial salt into saturated solution; then, fully and uniformly mixing solid ammonium fluoaluminate and the industrial salt saturated solution which are made into starchiness; carrying out calcination reaction for 1 to 2 hours under the condition of 400 to 600 DEG C, and finally obtaining solids, namely cryolite products. Compared with the previous method for producing cryolite, the present invention has the advantages oflower production cost because of using aluminum profile surface treating waste slag-ammonium fluoroaluminate as materials, simple process and easy control, solves the problem of environmental pollution caused by the long-term overstock of ammonium fluoroaluminate waste and changes waste into valuables.
Description
Technical Field
The invention relates to a method for producing cryolite, in particular to a method for producing cryolite by taking ammonium fluoroaluminate, which is waste residue generated by surface treatment of aluminum profiles, as a main raw material.
Background
The cryolite is named sodium fluoroaluminate in chemical name and has the molecular formula of Na3AlF6It is mainly used as fluxing agent for aluminium electrolysis, wear-resisting filler for rubber and grinding wheel, opalescent agent for enamel, light-shading agent for glass and metal flux, etc. The traditional production process of cryolite is a fluoroaluminate soda ash method, and in addition, a clay bittern method, a sodium fluosilicate method, a sodium fluoroaluminate method and the like are adopted.
Disclosure of Invention
The invention aims to provide a method for producing cryolite, which reduces the production cost and changes waste into valuable.
In order to achieve the purpose, the technical scheme of the invention is as follows: reacting aluminum profile surface treatment waste residue-ammonium fluoroaluminate and industrial salt serving as raw materials in a solid phase, preparing saturated solution from the industrial salt, fully and uniformly mixing solid ammonium fluoroaluminate and the saturated solution of the industrial salt to prepare paste, and performing calcination reaction at the temperature of 400-600 ℃ for 1-2 hours to obtain the solid cryolite product.
The granularity of the ammonium fluoroaluminate is 150-250 meshes.
The chemical reaction formula of the invention is as follows:
absorbing ammonia gas and hydrogen chloride generated in the reaction process with water, cooling and packaging the solid after the reaction, wherein the solid is a cryolite product.
Compared with the prior cryolite production method, the invention is characterized in that: (1) because the waste residue of aluminum profile surface treatment, namely the ammonium fluoroaluminate, is used as the raw material, the production cost is lower, (2) the method has simple process and is easy to control; (3) solves the problem of environmental pollution caused by long-term overstock of ammonium fluoroaluminate waste, and can change waste into valuable.
Drawings
FIG. 1 is a schematic process flow diagram of the present invention.
Detailed Description
Example 1
As shown in fig. 1, the reaction process is as follows: preparing saturated solution from industrial salt, fully and uniformly mixing solid ammonium fluoroaluminate with the particle size of 150 meshes and the saturated solution of the industrial salt to prepare paste, carrying out calcination reaction at the temperature of 450 ℃ for 2 hours, absorbing ammonia gas and hydrogen chloride generated in the reaction process with water, taking the reacted solid as a cryolite product, cooling and packaging.
Example 2
Preparing saturated solution from industrial salt, fully and uniformly mixing solid ammonium fluoroaluminate with the granularity of 200 meshes and the saturated solution of the industrial salt to prepare paste, carrying out calcination reaction at 500 ℃ for 1.5 hours, absorbing ammonia gas and hydrogen chloride generated in the reaction process with water, taking the reacted solid as a cryolite product, cooling and packaging.
Example 3
Preparing industrial salt into saturated solution, fully and uniformly mixing solid ammonium fluoroaluminate with the granularity of 250 meshes and the industrial salt saturated solution to prepare paste, carrying out calcination reaction at 550 ℃ for 1 hour, absorbing ammonia gas and hydrogen chloride generated in the reaction process with water, taking the reacted solid as a cryolite product, cooling and packaging.
Claims (2)
1. A method of producing cryolite, comprising: the method takes ammonium fluoroaluminate and industrial salt as raw materials to react in a solid phase, the industrial salt is prepared into a saturated solution, then the solid ammonium fluoroaluminate and the industrial salt saturated solution are fully and uniformly mixed to prepare a paste, the calcining reaction is carried out at the temperature of 400-600 ℃, the reaction time is 1-2 hours, and finally the obtained solid is the cryolite product.
2. A process for producing cryolite according to claim 1 wherein: the granularity of the ammonium fluoroaluminate is 150-250 meshes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100604718A CN1314592C (en) | 2004-08-19 | 2004-08-19 | Cryolite production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100604718A CN1314592C (en) | 2004-08-19 | 2004-08-19 | Cryolite production method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1736875A CN1736875A (en) | 2006-02-22 |
| CN1314592C true CN1314592C (en) | 2007-05-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100604718A Expired - Fee Related CN1314592C (en) | 2004-08-19 | 2004-08-19 | Cryolite production method |
Country Status (1)
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| CN (1) | CN1314592C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101289213B (en) * | 2007-04-19 | 2011-07-20 | 多氟多化工股份有限公司 | Process for preparing cryolite |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU431113A1 (en) * | 1970-04-20 | 1974-06-05 | В. Г. Морозов, О. С. Игнатьев, И. А. Варлаков , В. Н. Коровин Институт химии , технологии резких элементов , минерального | METHOD OF OBTAINING FLUORINE ALUMINUM |
| US3816591A (en) * | 1972-05-05 | 1974-06-11 | Oesterr Stickstoffwerke Ag | Process for the recovery of aluminium and fluorine from a dilute aqueous solution |
| CN1456507A (en) * | 2002-05-10 | 2003-11-19 | 焦作市多氟多化工有限公司 | Method for producing cryolite |
| CN1491892A (en) * | 2002-10-23 | 2004-04-28 | 赵小春 | Method for producing cryolite |
-
2004
- 2004-08-19 CN CNB2004100604718A patent/CN1314592C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU431113A1 (en) * | 1970-04-20 | 1974-06-05 | В. Г. Морозов, О. С. Игнатьев, И. А. Варлаков , В. Н. Коровин Институт химии , технологии резких элементов , минерального | METHOD OF OBTAINING FLUORINE ALUMINUM |
| US3816591A (en) * | 1972-05-05 | 1974-06-11 | Oesterr Stickstoffwerke Ag | Process for the recovery of aluminium and fluorine from a dilute aqueous solution |
| CN1456507A (en) * | 2002-05-10 | 2003-11-19 | 焦作市多氟多化工有限公司 | Method for producing cryolite |
| CN1491892A (en) * | 2002-10-23 | 2004-04-28 | 赵小春 | Method for producing cryolite |
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| Publication number | Publication date |
|---|---|
| CN1736875A (en) | 2006-02-22 |
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Granted publication date: 20070509 Termination date: 20130819 |