Mineral pelletisation
AssigneeCiba Specialty Chemicals Water Treatments Ltd.
InventorsJohn Rodney Field, Paul Stocks
Life of this patent
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Abstract
The present invention is directed to a process of making fired mineral pellets by mixing particulate mineral material with moisture and binder comprising substantially water soluble organic polymer to form a moist pelletizable mix, pelletizing the moist mix by a tumbling process to form green pellets and firing the green pellets, characterized in that the binder comprises alkali metal silicate in a dry weight amount which is either (a) above 0.13% based on moist mix or (b) above 0.08% based on moist mix and at least three times the dry weight of substantially water soluble organic polymer.
Claims13
A process of making fired mineral pellets by mixing particulate mineral material with moisture and binder comprising substantially water soluble organic polymer to form a moist pelletisable mix, pelletising the moist mix by a tumbling process to form green pellets and firing the green pellets, characterised in that the binder comprises alkali metal silicate in a dry weight amount which is either (a) above 0.13% based on moist mix or (b) above 0.08% based on moist mix and at least three times the dry weight of substantially water soluble organic polymer.
Green mineral pellets formed of mineral particles bonded by binder comprising substantially water soluble organic polymer and alkali metal silicate in a dry weight which is either (a) above 0.13% based on the pellets or (b) above 0.08% by weight based on the pellets and at least three times the dry weight of the substantially water soluble organic polymer.
Dependencies are inferred from the claim text.