Method for producing red iron oxide pigment
A technology of iron oxide red and production method, which is applied in the direction of iron oxide, iron oxide/iron hydroxide, etc., can solve the problems of long production cycle, high production cost, complicated process, etc., and achieve short production process, stable product quality and excellent process Easy-to-grasp effects
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[0017] The implementation mode takes actual production as an example. at 10m 3 Inject about 5m into the plastic reactor 3 of water, start stirring, throw in 1500Kg of jarosite slag after removing iron in the cobalt chloride hydrometallurgy process, control the pH at 5-6, dehydrate the jarosite slag through a plate-and-frame filter press after half an hour, and make the water content Control it below 40%. Drying is carried out by a drying tunnel kiln, which is equipped with a liquefied gas delivery system; then the alum slag filter cake is loaded into a porcelain boat, and sent to the drying tunnel kiln for 3 to 5 hours, with the temperature controlled at 120 to 150 °C. The iron slag is cooled, pulverized by a pulverizer, put into a mullite bowl, sent to a calciner for calcination for 2-4 hours, and the calcination temperature is controlled at 550-650°C. The calcined powder is put into a plastic reactor, washed with water at 60-90°C, stirred for half an hour, dehydrated into...
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