Silicic fertilizer and production method thereof
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United States of America Patent
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Sep 2, 2003
Grant Date -
Jan 24, 2002
app pub date -
Jul 12, 2001
filing date -
Jan 14, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
This invention provides a silicic fertilizer using a slag produced in a preliminary treatment of a molten pig iron and imparted with a high soluble silica content, and a production method of such a silicic fertilizer. CaO is added and oxygen is blown into a molten pig iron while adjusting a basicity (CaO/SiO.sub.2) to 3 or below, and the molten pig iron is subjected to desiliconization and dephosphorization. The resulting slag is collected to produce the silicic fertilizer. This silicic fertilizer has a basicity (CaO/SiO.sub.2) of not greater than 3 and contains 15 to 35 mass % of soluble silica.
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Cited Art Landscape
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