Interferência de cátions Ca2+ nas etapas de deslamagem e flotação de minério de ferro

摘要: Aiming at the evaluation of possibility to change point addition hydrated lime, from slurry stocking tanks pipeline feed concentrate thickeners, a sample material Samarco's concentrator was collected. Laboratory experiments, involving grinding, dispersion, desliming and flotation, were carried out by varying lime as function slurry's pH, check interference generated Ca2+ cations present in recovered water over flotation processes. The pH targeted level chosen better comply with rheology control during pumping process (pH=11,4). results appointed possible, given performance receives continuous control. If increase added is enough pulp values above 10,5, start act coagulants, therefore promoting negative effect its own performance, affecting making it difficult obtain specified SiO2 levels concentrate.