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(12) Patent: | (11) CA 1231237 |
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(21) Application Number: | 1231237 |
(54) English Title: | PROCEDE DE COMPACTAGE A CHAUD SANS MELANGE PREALABLE DE MINERAI DE PHOSPHATE ENRICHI |
(54) French Title: | ENRICHED PHOSPHATE ORE HOT COMPACTION PROCSS WITHOUT PRELIMINARY MIXING |
Status: | Term Expired - Post Grant |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | ROBIC, ROBIC & ASSOCIES/ASSOCIATES |
(74) Associate agent: | |
(45) Issued: | 1988-01-12 |
(22) Filed Date: | 1984-05-23 |
Availability of licence: | N/A |
Dedicated to the Public: | N/A |
(25) Language of filing: | French |
Patent Cooperation Treaty (PCT): | No |
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(30) Application Priority Data: | ||||||
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PRECIS DE LA DIVULGATION:
L'invention concerne un procédé de compactage à
chaud sans mélange préalable d'un minerai de phosphate
enrichi ayant la constitution moyenne suivante:
P2O5 20 à 40 % en poids
CaO 50 à 55 % en poids
SiO2 1 à 5 % en poids
Humidité 1 à 5 % en poids
et un diamètre moyen d'environ 200 microns, consistant à
calciner ledit phosphate à une température comprise entre
700 et 1000°C puis à l'introduire dans une trémie alimen-
tant les roues munies d'alvéoles d'une presse à compacter
où il subit un compactage à une température comprise entre
700 et 1000°C. Selon une modalité préférée, on applique de
l'eau et/ou une solution ou dispersion aqueuse comprenant
au moins un oxyde de métal alcalino-terreux sur la surface
desdites alvéoles. Ce procédé de l'invention fournit un
procédé économique et efficace pour préparer du minerai de
phosphate pour l'alimentation des fours à phosphore ne
nécessitant pas de mélange préalable du minerai à d'autres
constituants. De plus, les boulets de phosphate fabriqués
ont une résistance à l'écrasement et une résistance à
l'attrition au moins aussi bonnes que celles du phosphate
obtenu par nodulation à 1500°C.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
Sorry, the representative drawing for patent document number 1231237 was not found.
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Description | Date |
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Inactive: Expired (old Act Patent) latest possible expiry date | 2005-01-12 |
Grant by Issuance | 1988-01-12 |
There is no abandonment history.
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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ATOCHEM |
Past Owners on Record |
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ALAIN MARI |
HENRI GUINAMAND |
JEAN-MARIE ROUX |
MICHEL MISCEVIC |