Fertilizer materials based on metallurgical slags and methods of making the same
OwnerNicholas A. Boukidisinventor
Life of this patent
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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%.
Claims6
An agricultural fertilizer material resistant to agglomeration, powering and burning of plant life comprising expanded blast furnace slag, said slag being substantially free of granulated slag, having a water content in the range 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%.
A method of making an agricultural fertilizer material resistant to agglomeration, powdering and burning of plant life comprising the steps of:
- (a) preparing a core mixture for one tone of fertilizer of the following composition:
- ______________________________________ Copper sulfate 2.6 lbs. Zinc sulphate 2.5 lbs. Sodium tetraborate 1.9 lbs. Manganese dioxide 1.6 lbs. Molybdic oxide 0.3 oz. Sodium chloride 4.0 lbs. Calcium sulfate 3.0 lbs. Cobaltic oxide 0.3 oz. Ferrous sulphate 5.0 lbs. ______________________________________
- (b) admixing said core aggregate to 59.3 lbs. of expanded blast furnace slag, said expanded blast furnace slag being substantially free of granulated slag and further having a water content f about 3% to 5% to form a core aggregate;
- (c) admixing said core aggregate with an additional 170 lbs. of expanded blast furnace slag, said expanded blast furnace slag being substantially free of granulated slag and further having a water content of about 3% to 5% to form a core aggregate premix;
- and
- (d) adding said core aggregate premix to the following mixture:
- ______________________________________ Urea 282 lbs. Slow release nitrogen compound 80 lbs. Sulphate of potash 40 lbs. Muriate of potash 132 lbs. Triple superphosphate 174 lbs. Montmorillonite Clay 100 lbs. Expanded blast furnace slag 942 lbs. ______________________________________
- to form a fertilizer composition.
An agricultural fertilizer material resistant to agglomeration, powdering and burning of plant life comprising expanded blast furnace slag, said slag being free of granulated slag, having a water content in the range about 3% to 5% and mixed with about 15% to 20% 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%.
Dependencies are inferred from the claim text.