DK0850901T3 - Process for Preparing a Calcium Phosphate-Containing Soil Improvement Agent and a Soil Improving Agent obtainable by this process - Google Patents
Process for Preparing a Calcium Phosphate-Containing Soil Improvement Agent and a Soil Improving Agent obtainable by this processInfo
- Publication number
- DK0850901T3 DK0850901T3 DK97403062T DK97403062T DK0850901T3 DK 0850901 T3 DK0850901 T3 DK 0850901T3 DK 97403062 T DK97403062 T DK 97403062T DK 97403062 T DK97403062 T DK 97403062T DK 0850901 T3 DK0850901 T3 DK 0850901T3
- Authority
- DK
- Denmark
- Prior art keywords
- iii
- calcium phosphate
- jet
- phases
- preparing
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D3/00—Calcareous fertilisers
- C05D3/04—Calcareous fertilisers from blast-furnace slag or other slags containing lime or calcium silicates
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B5/00—Thomas phosphate; Other slag phosphates
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Fertilizers (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Materials For Medical Uses (AREA)
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
Production of a calcium phosphate soil improver (I) comprises reacting a slag (II) from steel-making of low phosphorus content with a phosphorus compound (III). (II) and (III) are homogenously mixed by projecting (III) in an injectable particle form into a jet of liquid (II). The metallic iron/ferrous iron (Fe<0>/Fe<2+>) redox equilibrium conditions and proportion of (III) are such that, on cooling, (I) is obtained containing calcium silicate and silicophosphate phases of the larnite ( beta -Ca2SiO4 or 'C2S') and/or '16 C2S, C3P' type, incorporating the phosphorus contained in (III). Also claimed are: (i) an apparatus for the above process comprising a metallurgical container from which (II) is poured as jet of liquid into a receiver while (III) is injected into the jet; and (ii) a product (I') of the process, which contains more than 35 wt.% of calcium phosphate and silico-phosphate phases of the 'C2S' and/or '16 C2S, C3P' type (excluding nagelschmidtite and silico-carnotite phases) having an average phosphorus content (as P2O5) of 6-21.5 %, where more than 90 % of the magnesium contained in (I') is either in the free state or substituted in a wustite.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9616251A FR2757849B1 (en) | 1996-12-31 | 1996-12-31 | PROCESS FOR THE PREPARATION OF A CALCIUM PHOSPHATE AMENDMENT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DK0850901T3 true DK0850901T3 (en) | 2002-05-27 |
Family
ID=9499330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK97403062T DK0850901T3 (en) | 1996-12-31 | 1997-12-17 | Process for Preparing a Calcium Phosphate-Containing Soil Improvement Agent and a Soil Improving Agent obtainable by this process |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0850901B1 (en) |
| AT (1) | ATE213226T1 (en) |
| DE (1) | DE69710438T2 (en) |
| DK (1) | DK0850901T3 (en) |
| ES (1) | ES2171867T3 (en) |
| FR (1) | FR2757849B1 (en) |
| PT (1) | PT850901E (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106967440B (en) * | 2017-04-14 | 2020-09-11 | 东南大学 | Medicament suitable for repairing composite heavy metal polluted soil and production and use methods thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7908791A (en) * | 1978-12-16 | 1980-06-18 | Uhde Gmbh | METHOD FOR CONVERTING WASTE SLUDGE FROM THE WET PHOSPHORIC ACID PURIFICATION. |
| BR8903714A (en) * | 1989-07-26 | 1991-01-29 | Sociedade Brasileira De Recupe | SLOPE CONVERSION PROCESS, GENERATED IN THE MANUFACTURE OF STEEL IN OXYGEN CONVERTERS, IN FERTILIZER, DUE TO THE INCORPARATION OF ONE OR MORE NUTRIENT ELEMENTS, OBTAINED BY TECHNIQUES OF PNEUMATIC INITIATION OF PARTICULATES IN THE SCORE TO BE CONQUERED IN THE CONTRACTORS OF THE CONTRACTORS IN THE SCORE TO BE CONVERTED |
| FR2708594B1 (en) * | 1993-07-30 | 1995-10-27 | Lorraine Laminage | Process for the preparation of a product for physical and / or chemical fertilization of soils. |
-
1996
- 1996-12-31 FR FR9616251A patent/FR2757849B1/en not_active Expired - Fee Related
-
1997
- 1997-12-17 AT AT97403062T patent/ATE213226T1/en not_active IP Right Cessation
- 1997-12-17 DE DE69710438T patent/DE69710438T2/en not_active Expired - Fee Related
- 1997-12-17 PT PT97403062T patent/PT850901E/en unknown
- 1997-12-17 ES ES97403062T patent/ES2171867T3/en not_active Expired - Lifetime
- 1997-12-17 DK DK97403062T patent/DK0850901T3/en active
- 1997-12-17 EP EP97403062A patent/EP0850901B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0850901B1 (en) | 2002-02-13 |
| PT850901E (en) | 2002-07-31 |
| ES2171867T3 (en) | 2002-09-16 |
| ATE213226T1 (en) | 2002-02-15 |
| DE69710438D1 (en) | 2002-03-21 |
| EP0850901A2 (en) | 1998-07-01 |
| EP0850901A3 (en) | 1999-04-07 |
| FR2757849A1 (en) | 1998-07-03 |
| FR2757849B1 (en) | 1999-01-22 |
| DE69710438T2 (en) | 2002-09-26 |
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