The efficacy of the surface-active agents in removing the gangue minerals in the suspension of iron ore fines is observed at higher scale (500 g iron of fines/2000 mL water) at pH 8. The slurry shall be mixed properly in the container with a stirrer for about 15-20 minutes at . how to remove iron fines from slurry of iron ore. how to remove iron fines from slurry of iron ore. Ore processing Waihi Gold. The slurry that remains after this process has a very fine particle size. Typically, 80% of the ore particles are less than 70 microns in size (about the same consistency as fine beach sand). Jan 11, 2006 At an iron ore outloading site in Australia, seasonal torrential downpours led to a tremendous volume of abrasive slurry that could not be handled in an effective manner by existing cantilever pumps. To resolve this situation, ITT Flygt unit provided the mining company with a complete solution built around its slurry pumps that finally solved a 30-year old problem.