GB654158A - Process for the treatment of phosphate rock - Google Patents
Process for the treatment of phosphate rockInfo
- Publication number
- GB654158A GB654158A GB23115/47A GB2311547A GB654158A GB 654158 A GB654158 A GB 654158A GB 23115/47 A GB23115/47 A GB 23115/47A GB 2311547 A GB2311547 A GB 2311547A GB 654158 A GB654158 A GB 654158A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heated
- furnace
- unit
- phosphate
- phosphate rock
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Gasification And Melting Of Waste (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
In making fertilizers comprising phosphate rock and a slag-forming material, e.g. slag containing lime, magnesia, alumina, silica &c., the phosphate rock is pre-heated to 1000 DEG C. and incorporated in the molten slag-forming material. In one embodiment, crushed phosphate rock is pre-heated by being charged into a rotary furnace immediately following the discharge of a previous molten charge, molten slag at 1350 DEG C. is then poured into the pre-heated phosphate and the mixture, e.g. of equal proportions of the ingredients, is heated to 1500 DEG C. The utilization of the heat of the combustion products for pre-heating the phosphate and the transference of the residual heat to recuperators for pre-heating the air required for combustion of the fuel for heating the furnace, may be effected by harnessing two rotary furnaces in tandem (see Group XII), and subjecting them to alternate reversal of firing; thus in continuous operation the phosphate rock is charged into one furnace unit while molten slag from a reduction furnace is charged into the other furnace unit containing pre-heated phosphate; the mixture in the second unit is heated to 1500 DEG C. during which time the combustion products therefrom are passed into the first unit to pre-heat the phosphate rock to 1000 DEG C. and after discharge of the mixture from the second unit, the first furnace unit is then charged with molten slag and the functions of the furnace units are reversed.ALSO:In making fertilizers comprising phosphate rock and a slag-forming material, e.g. slag containing lime, magnesia, alumina, silica &c. the phosphate rock is pre-heated to 1000 DEG C and incorporated in the molten slag-forming material. In one embodiment, crushed phosphate rock is pre-heated by being charged into a rotary furnace immediately following the discharge of a previous molten charge, molten slag at 1350 DEG C is then poured into the pre-heated phosphate and the mixture, e.g. of equal proportions of the ingredients, is heated to 1500 DEG C. The utilization of the heat of the combustion products for pre-heating the phosphate and the transference of the residual heat to recuperators for pre-heating the air required for combustion of the fuel for heating the furnace, may be effected by harnessing two rotary furnaces in tandem (see Group XII), and subjecting them to alternate reversal of firing, thus in continuous operation the phosphate rock is charged into one furnace unit while molten slag from a reduction furnace is charged into the other furnace unit containing pre-heated phosphate; the mixture in the second unit is heated to 1500 DEG C, during which time the combustion products therefrom are passed into the first unit to pre-heat the phosphate rock to 1000 DEG C, and after discharge of the mixture from the second unit, the first unit is charged with molten slag and the functions of the furnace units are reversed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB23115/47A GB654158A (en) | 1947-08-20 | 1947-08-20 | Process for the treatment of phosphate rock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB23115/47A GB654158A (en) | 1947-08-20 | 1947-08-20 | Process for the treatment of phosphate rock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB654158A true GB654158A (en) | 1951-06-06 |
Family
ID=10190354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23115/47A Expired GB654158A (en) | 1947-08-20 | 1947-08-20 | Process for the treatment of phosphate rock |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB654158A (en) |
-
1947
- 1947-08-20 GB GB23115/47A patent/GB654158A/en not_active Expired
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