GB939799A - Upgrading of calcareous rock phosphate - Google Patents
Upgrading of calcareous rock phosphateInfo
- Publication number
- GB939799A GB939799A GB4244560A GB4244560A GB939799A GB 939799 A GB939799 A GB 939799A GB 4244560 A GB4244560 A GB 4244560A GB 4244560 A GB4244560 A GB 4244560A GB 939799 A GB939799 A GB 939799A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ammonium chloride
- solid
- phosphate
- solution
- calcium hydroxide
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B11/00—Fertilisers produced by wet-treating or leaching raw materials either with acids in such amounts and concentrations as to yield solutions followed by neutralisation, or with alkaline lyes
- C05B11/02—Pretreatment
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F5/00—Compounds of magnesium
- C01F5/14—Magnesium hydroxide
- C01F5/20—Magnesium hydroxide by precipitation from solutions of magnesium salts with ammonia
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
Calcareous phosphate ore is upgraded by calcining and wet slaking after which the calcium hydroxide is separated from the phosphate concentrate as a slurry. The calcium hydroxide which carries with it some of the phosphate ore is reacted with ammonium chloride solution or solid to form calcium chloride and ammonia in solutions. Residual phosphate is removed for example by filtration. The solution is then heated to remove the ammonia which is passed into solutions containing magnesium chloride thus precipitating magnesium hydroxide and forming ammonium chloride in solution, as in the parent Specification. The mixture is then filtered and the ammonium chloride liquor is either evaporated to dryness or added as such to further calcium hydroxide. The wet slaking is preferably carried out at the boil and the resultant slurry may be concentrated to a solid:liquid ratio between 1:4 and 1:5 in which case the ammonium chloride is added as a solid, or it may be evaporated to dryness in which case ammonium chloride liquor is employed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4244560A GB939799A (en) | 1960-12-09 | 1960-12-09 | Upgrading of calcareous rock phosphate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4244560A GB939799A (en) | 1960-12-09 | 1960-12-09 | Upgrading of calcareous rock phosphate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB939799A true GB939799A (en) | 1963-10-16 |
Family
ID=10424452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4244560A Expired GB939799A (en) | 1960-12-09 | 1960-12-09 | Upgrading of calcareous rock phosphate |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB939799A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109052345A (en) * | 2018-08-29 | 2018-12-21 | 石门县金子山新材料科技有限公司 | A kind of low-grade silicon calcium quality ore method for separating reducing content of magnesia |
-
1960
- 1960-12-09 GB GB4244560A patent/GB939799A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109052345A (en) * | 2018-08-29 | 2018-12-21 | 石门县金子山新材料科技有限公司 | A kind of low-grade silicon calcium quality ore method for separating reducing content of magnesia |
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