METHOD TO PREPARE OILY MILL SCALE OF METALLURGIC PRODUCTION FOR BRIQUETTING Russian patent published in 2012 - IPC C22B1/248 C22B1/243 

FIELD: metallurgy.

SUBSTANCE: crushed oily mill scale is mixed with dry caustic soda in an amount of 2-3 kg per 1% of oil per 1 ton of scale, then additionally with dry soda ash, 7-8 kg per 1% of oil per 1 ton of scale and claydite powder, 8-12 kg, respectively. Then it is poured with an aqueous solution of liquid glass with a density of 1350-1400 kg/m³ in the volume of 8-10 l of 1% oil per 1 ton of scale from the previously dissolved therein sodium fluorosilicate salt in an amount of 50-60 g per 1 litre of liquid glass solution.

EFFECT: invention helps to reduce energy consumption and improve the drying process and reduce drying time, improves granulation of oily scale without burning of oil and emission of harmful acid gases.

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