PHOSPHOROUS PENTOXIDE PRODUCING METHODS AND SYSTEMS WITH INCREASED AGGLOMERATE COMPRESSION STRENGTH

PHOSPHOROUS PENTOXIDE PRODUCING METHODS AND SYSTEMS WITH INCREASED AGGLOMERATE COMPRESSION STRENGTH

A phosphorous pentoxide producing method includes forming pre-feed agglomerates containing phosphate ore particles, carbonaceous material particles, and silica particles and heating the pre-feed agglomerates in a reducing or inert atmosphere to an induration temperature from above 900 C to less than...

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Bibliographische Detailangaben
Hauptverfasser: PACHPOR, SOURABH A, HANDMAN, LAWRENCE M, FOWLER, THEODORE P, TRAINHAM, JAMES A, BLAKE, DAVID B, VIGNOVIC, MARK
Format: Patent
Sprache:eng ; pol
Schlagworte:
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
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Zusammenfassung:A phosphorous pentoxide producing method includes forming pre-feed agglomerates containing phosphate ore particles, carbonaceous material particles, and silica particles and heating the pre-feed agglomerates in a reducing or inert atmosphere to an induration temperature from above 900 C to less than 1180 C and maintaining the induration temperature for 15 minutes or more. The method includes forming feed agglomerates and increasing a compression strength of the feed agglomerates to above 25 lbf using the heating, the feed agglomerates exhibiting a calcium-to-silica mole ratio less than 1 and a silica-to-(calcium+magnesium) mole ratio greater than 2. A reducing kiln bed is formed using the feed agglomerates, kiln off-gas is generated, and phosphorous pentoxide is collected from the kiln off gas.