GB645709A - Improvements in and relating to the production of phosphatic fertilisers - Google Patents
Improvements in and relating to the production of phosphatic fertilisersInfo
- Publication number
- GB645709A GB645709A GB3102147A GB3102147A GB645709A GB 645709 A GB645709 A GB 645709A GB 3102147 A GB3102147 A GB 3102147A GB 3102147 A GB3102147 A GB 3102147A GB 645709 A GB645709 A GB 645709A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mixture
- ground
- oven
- curing
- firing
- 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
- C05B13/00—Fertilisers produced by pyrogenic processes from phosphatic materials
- C05B13/02—Fertilisers produced by pyrogenic processes from phosphatic materials from rock phosphates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
Abstract
Phosphatic fertilizers are made by finely grinding phosphate-bearing rocks, especially those containing a high content of iron oxide and/or alumina, mixing the ground rock with natural or artificial sodium sesquicarbonate, with or without additional sodium carbonate, in such proportions that the ratio Na2O:P2O5 in the resulting mixture is between 1.3:1 and 2:1, curing the mixture by maintaining it between 100 DEG and 700 DEG C for not less than 5 hours and firing the cured mixture at 1050 DEG -1200 DEG C in a closed oven. The final product may be ground and bagged. In the firing step the maximum working temperature is preferably maintained for at least 1 hour before the oven is allowed to cool. In one embodiment water is added in the mixing step and the wet mixture of ground rock and alkaline reagent is kneaded to a thick paste or dough which is then formed into briquettes or pats, the latter being either air-dried until hard or stored before curing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3102147A GB645709A (en) | 1947-11-22 | 1947-11-22 | Improvements in and relating to the production of phosphatic fertilisers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3102147A GB645709A (en) | 1947-11-22 | 1947-11-22 | Improvements in and relating to the production of phosphatic fertilisers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB645709A true GB645709A (en) | 1950-11-08 |
Family
ID=10316739
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3102147A Expired GB645709A (en) | 1947-11-22 | 1947-11-22 | Improvements in and relating to the production of phosphatic fertilisers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB645709A (en) |
-
1947
- 1947-11-22 GB GB3102147A patent/GB645709A/en not_active Expired
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