Water treated could be ≤80 mg/L suspended solid when primary settling thickeners were used to treat scrubbing wastewater of converter fume. Meanwhile underflow density of slurry was up to 40%-60%. The slurry from the thickeners was pumped into pressure filters by means of high density transportation to form the slurry cake with ≤25% water content.
This paper studies the lag problem of vitriol temperature in entrance relative to SO_2 (fan's) current adjustment in the cooler for protecting positive pole of the absorption tower of converter flue gas sour system. After measuresing the change of vitriol temperature with change of time when the manual regulation by a calculating model of current adjustment was established.