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AssigneeIroncolour Sp Z O.O.
InventorsLukasz BOZEK, Arkadiusz GASINSKI, Agnieszka ANTOSIK, Malgorzata SACZAWA, Paulina TYMOWICZ-GRZYB
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The subject of the invention is a method for the production of pigment from filtration sludges containing manganese and iron and phosphates, characterised in that the filter sludge is sieved on a vibrating sieve, then the suspension is concentrated and dried to a water content below 8% w/w, after which the material is subjected to thermal treatment at a temperature in the range of 500-1200° C. for a period of 6-12 hours, and the obtained sinter is fragmented and optionally dried to a moisture level of 5%. The invention also relates to using the pigment produced by the foregoing method colouring construction ceramic products or as a colouring additive to the mass from which construction products are formed or as a colouring additive for concrete.
A method for producing a pigment from a waste material after deep water filtration, which is a manganese-iron suspension taken from a water treatment plant containing manganese and iron, and phosphates, characterised in that the manganese-iron suspension has a dry matter content of at least 15% w/w iron compounds and/or at least 0.5% w/w manganese compounds and/or 0.5% w/w phosphorus compounds is sieved on a vibrating sieve with a mesh size of 100-125 μm, then the suspension is concentrated and dried to a water content of less than 8% w/w, and then the material is subjected to thermal treatment at a temperature in the range of 500-1200° C. for a period of 6-12 hours, and the obtained sinter is ground and optionally dried to a moisture level of 5%.
(canceled)
Use of the pigment produced by a method as described in claim for colouring construction ceramics or as a colouring additive to the mass from which construction products are formed, or as a colouring additive for concrete.
Dependencies are inferred from the claim text.