METHOD OF CONTROLLING AGITATION LEACHING OF SILICA-CONTAINING CAKE Russian patent published in 1997 - IPC

FIELD: mining industry. SUBSTANCE: process is carried out by way of feeding washing water and soda-alkali solution in preselected proportions to usage of cake to be leached. Density of slurry after leaching is measured and stabilized by changing ratio of consumed washing water, soda-alkali solution, and cake. Washing water is poured in together with cake, whereas soda-alkali solution is introduced through spray cone with preset angle on its vertex. Density of liquid phase of slurry after leaching is also measured and, if derivative of slurry and slurry liquid phase density difference is higher than a certain limit, preset angle on cone vertex is changed until density of liquid phase of slurry with preselected density achieves its maximum value. EFFECT: process control provided. 1 dwg