Experimental Study on High Concentration Flotation Decarbonization of Taiyuan Iron and Steel Fly Ash
The industrial production slurry quality fraction of fly ash aerated concrete building materials is above 50%.To verify the feasibility of flotation decarbonization of TISCO fly ash at this concentration,a low-cost linkage with actual production processes is formed.This experiment adopts a one-stage flotation method,and explores the optimal flotation decarbonization conditions under the condition of slurry concentration of 50%through single factor experiments and dispersant experiments.The results showed that under the conditions of inflation rate of 120 L/h,sodium silicate 1000 g/t,kerosene 800 g/t,and secondary octanol 150 g/t,the ignition loss of fly ash was the lowest,at 2.31%,and the yield reached 84.00%.Adding a small amount of sodium silicate can effectively improve the flotation effect.Compared with the no addition group,the loss on ignition of fly ash is reduced by 0.60%,and the yield is increased by 0.86%.
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