Abstract: A method and apparatus for separating and recovering volatile solvents from exhaust air containing volatile solvents and water vapor, the method including passing the exhaust gas alternatively through one of two beds of molecular sieve packings composed of a material capable of adsorbing the water vapors therein and then through one of two beds of molecular sieve packings composed of a material capable of adsorbing the solvent vapors therein. Heated air or inert gas is passed through the beds not being used to adsorb either the water vapor or the solvent vapors so as to regenerate the molecular sieve packings. The air or inert gas containing solvent is passed through a condenser and a drip collector so as to recover the solvent therefrom.

Abstract: An apparatus for the direct reduction of sulphurous iron ores with a shaft furnace, in which the ore is reduced in counterflow to the reducing gas is described, the waste gas being subdivided into two streams folllowing the furnace. One stream heats and desulphurizes the ore located above the shaft furnace in an ore bunker and is then supplied to the gas converter for heating purposes. The other stream, together with hydrocarbons, is supplied to a catalytic gas converter for producing reducing gas. The ore bunker is positioned above the shaft furnace and the ore outlet of the ore bunker is connected via downcomers with the ore inlet of the shaft furnace.

Abstract: An apparatus for the direct reduction of sulphurous iron ores with a shaft furnace, in which the ore is reduced in counterflow to the reducing gas is described, the waste gas being subdivided into two streams following the furnace. One stream heats and desulphurizes the ore located above the shaft furnace in an ore bunker and is then supplied to the gas converter for heating purposes. The other stream, together with hydrocarbons, is supplied to a catalytic gas converter for producing reducing gas. The ore bunker is positioned above the shaft furnace and the ore outlet of the ore bunker is connected via downcomers with the ore inlet of the shaft furnace.