Fertilizer materials based on metallurgical slags and methods of making the same
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United States of America Patent
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Feb 4, 1992
Issued Date -
N/A
app pub date -
Jan 9, 1989
filing date -
Feb 13, 1987
priority date (Note) -
Expired
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Abstract
An agricultural fertilizer material is provided which is resistant to agglomeration, powdering and burning of plant life and which is made up of lightweight blast furnace slag having a water content in the range of about 3% to 5% and mixed with about 10% to 35% by weight of a mixture of nitrogen, phosphoric acid and potash as conventional nutrient salts, said salts and nitrogen being present in amounts sufficient to provide at least 1% by weight of nitrogen on the total mix and said slag having a CaO equivalent of about 20% to 25%.
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