Vacuum filtration and centrifugal dewatering of materials extracted from drainage in refractory plants

Abstract

With vacuum filtration the following apply: For dewatering the effluent (drainage) residue the concentration of the original suspension should be not less than 700 g/liter. The suction method can be used to dewater only residues based on chamotte dust or mixtures of chamotte and clay (not more than 20%); on the drum vacuum filter even with a mixture of chamotte and clay (not more than 20%) we obtain unsatisfactory results. To dewater suspensions containing chamotte and clay dust it is possible to use vacuum-filters with a residue feed using the overflow method, but such vacuum-filters are not being made by Soviet industry. Vacuum filtration as a method of dewatering residues from drainage contaminated with chamotte and clay is not recommended. Using centrifuging: The residues of the effluents can be dewatered on centrifuges; it is best to dewater residues formed from the coagulation of drainage water than residues formed from noncoagulated drainage. Centrifuging is affected by the nature of the formation of the original material. It is necessary to continue the research into laboratory and production centrifuges.