Process for the preparation of compound fertilizer granules
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United States of America Patent
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Mar 23, 2004
Grant Date -
N/A
app pub date -
Mar 5, 2001
filing date -
Jun 29, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a process for the preparation of compound fertilizer granules containing at least two of the plant nutrients nitrogen, phosphorus and potassium, said process including the steps of: providing a solid fee material including at least one solid fertilizer raw material and optionally recycle material, feeding the feed material or a part thereof into a melter for melting a desired portion thereof and keeping said portion in molten state, feeding the molten or partly molten material and optionally other desired solid raw materials to a granulator to obtain a granulated product, and cooling and optionally screening the granulated product to obtain dry compound fertilizer granules having a desired size distribution, provided that no water or aqueous liquid is introduced into the process.
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Cited Art Landscape
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