Self-agglomerating fluidized bed reacting process

Claim 1

In a process wherein finely divided materials are reacted in a fluidized main bed above a grate and at a temperature involving self-agglomerating conditions under which slag sinks gradually through said fluidized bed down to said grate, an improved method of extracting said slag from said fluidized bed, comprising the steps of providing a shallow cell which rests on said grate and overlies a portion thereof and defines with said grate an enclosed space which is open at the bottom to said grate and adapted to accommodate an auxiliary shallow fluidized bed, said cell having an aperture communicating said fluidized beds with each other and through which slag enters said space, and an opening leading to an ashpit; rotating said grate and said cell relative to each other so that fluidized bed material and slag settled on said grate enter said space through said aperture; and blowing a reacting fluidizing gas through said grate into said fluidized beds for maintaining them in hydrostatic equilibrium with one another and for sorting and extracting slag in said cell from said auxiliary shallow fluidized bed through said opening to enter the ashpit.