Abstract: A bulk-handling belt conveyor has a flat belt having reinforced edges which cooperate with guides in such a way that the conveyor belt is formed at least into a trough and preferably a tube of circular cross section. A twisted, or spiral undriven, belt which is entrained within the trough or tube of the driven conveyor belt through frictional or interlocking engagement therewith. In this way, a belt conveyor is provided which is suited both for horizontal conveying and for conveying over inclined paths that are steeper than the angle of repose of the bulk material, has high handling capacity and results in little attrition of the bulk material.