AN OPEN PRESSURISED AGITATED REACTOR AND A METHOD FOR MIXING GAS AND SLURRY WITH EACH OTHER

摘要

The invention relates to an apparatus (1) for performing hydrometallurgical processes under pressurised conditions. The apparatus consists of a tall vertical reactor (2) and a pressurised horizontal reactor (3) located beneath it. The vertical reactor (2) for its part comprises two nested tubes, so that the upper part of the inner tube (4) is equipped with a downdraft mixer (6) and elements (17) that intensify the absorption of the supplied gas into the slurry, such as Venturis. The slurry is fed into the inner tube (4) to flow downwards and the reaction gas is fed into the upper part of the inner tube (4) at one point at least. The vertical reactor (2) is connected at its lower section to an autoclave-type horizontal reactor (3), which is equipped with effective radial mixers (7) to keep the slurry suspension in motion and to achieve an upflow to convey the slurry suspension into the outer tube (5) of the vertical reactor (2). In the method accordant with the invention the length of contact time occurring under pressure between the gas and slurry is extended by means of the horizontal reactor (3).