| 摘要 |
<p>Improved process for the fluidisation of flocculated aqueous red mud suspensions in the manufacture of bauxite by the Bayer process, which consists: . in dissolving bauxite with sodium hydroxide solution, . then in separating by settling and in washing the red muds formed in order to separate them from the alumina in successive tanks, the washing liquors being recycled upstream, . and finally in removing the red muds thus treated, and in which a flocculating agent (F), consisting of a polyacrylamide with a molecular weight greater than ten million, is introduced into the suspension in one of the successive tanks; characterised in that, simultaneously with this flocculating agent (F), a dispersing agent (D), formed by an anionic acrylic acid polymer with a molecular weight of less than fifty thousand, is added to the suspension and in the same tank. <IMAGE></p> |
