JPS5722118A - Modifying method of gypsum formed in preparing phosphoric acid by wet process as by-product - Google Patents
Modifying method of gypsum formed in preparing phosphoric acid by wet process as by-productInfo
- Publication number
- JPS5722118A JPS5722118A JP9511180A JP9511180A JPS5722118A JP S5722118 A JPS5722118 A JP S5722118A JP 9511180 A JP9511180 A JP 9511180A JP 9511180 A JP9511180 A JP 9511180A JP S5722118 A JPS5722118 A JP S5722118A
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- product
- particles
- phosphoric acid
- gypsum formed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052602 gypsum Inorganic materials 0.000 title abstract 9
- 239000010440 gypsum Substances 0.000 title abstract 9
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 title abstract 6
- 239000006227 byproduct Substances 0.000 title abstract 5
- 238000000034 method Methods 0.000 title abstract 4
- 229910000147 aluminium phosphate Inorganic materials 0.000 title abstract 3
- 239000002245 particle Substances 0.000 abstract 7
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 2
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 2
- 239000004571 lime Substances 0.000 abstract 2
- 239000002002 slurry Substances 0.000 abstract 2
- 159000000007 calcium salts Chemical class 0.000 abstract 1
- 239000004568 cement Substances 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 239000002351 wastewater Substances 0.000 abstract 1
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
PURPOSE: To modify gypsum formed as a by-product so as to be usable in the same manner as the natural gypsum, by treating the gypsum formed as the by-product in the form of an aqueous slurry with a hydrocyclone, separating particles of a given particle size, adding lime thereto, a drying the separated particles.
CONSTITUTION: Gypsum formed as a by-product in preparing phosphoric acid by the wet process is stirred as an aqueous slurry, and treated with a hydrocyclone and disintegrated. Solid particles and soluble impurities finer than the gypsum particles are removed to give the separated particle size of about 5W20μ. Lime is then added to the separated gypsum particles to adjust to an alkaline pH of about 8W10 and fix the phosphoric acid content as a water-insoluble calcium salt. According to the method, the gypsum formed as a by-product can be modified to gypsum fit for cement without discharging an alkaline waste water.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9511180A JPS5722118A (en) | 1980-07-14 | 1980-07-14 | Modifying method of gypsum formed in preparing phosphoric acid by wet process as by-product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9511180A JPS5722118A (en) | 1980-07-14 | 1980-07-14 | Modifying method of gypsum formed in preparing phosphoric acid by wet process as by-product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5722118A true JPS5722118A (en) | 1982-02-05 |
Family
ID=14128735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9511180A Pending JPS5722118A (en) | 1980-07-14 | 1980-07-14 | Modifying method of gypsum formed in preparing phosphoric acid by wet process as by-product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5722118A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63260816A (en) * | 1987-01-21 | 1988-10-27 | イー シー シー インターナショナル リミテッド | Manufacture of fine grain calcium sulfate |
| US5500197A (en) * | 1990-10-30 | 1996-03-19 | Metallgesellschaft Aktiengesellschaft | Process of purifying gypsum |
| KR100416518B1 (en) * | 2000-09-18 | 2004-01-31 | 태원물산주식회사 | Manufacturing method of refining phospho-gypsum for cement |
| CN103435021A (en) * | 2013-08-19 | 2013-12-11 | 瓮福（集团）有限责任公司 | Wet process phosphoric acid production device and method |
-
1980
- 1980-07-14 JP JP9511180A patent/JPS5722118A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63260816A (en) * | 1987-01-21 | 1988-10-27 | イー シー シー インターナショナル リミテッド | Manufacture of fine grain calcium sulfate |
| US5500197A (en) * | 1990-10-30 | 1996-03-19 | Metallgesellschaft Aktiengesellschaft | Process of purifying gypsum |
| KR100416518B1 (en) * | 2000-09-18 | 2004-01-31 | 태원물산주식회사 | Manufacturing method of refining phospho-gypsum for cement |
| CN103435021A (en) * | 2013-08-19 | 2013-12-11 | 瓮福（集团）有限责任公司 | Wet process phosphoric acid production device and method |
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