Depressores alternativos na flotação catiônica reversa de minério de ferro

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Universidade Federal de Goiás


The depressant used in the iron ore flotation are starches, basically made up of amylose and amylopectin, and the most widely used corn because of its availability and economic viability. The objective was to study the performance of seven starches from different botanical sources in reverse flotation cation of iron ore through Microflotation and flotation test bench cell. We evaluated the influence of different dosage depressants in the buoyancy of the minerals quartz and hematite, the tests used to passing particle size of 180 m and held 75 micrometre (-80 + # 200 #). Any material used in the present study was completely released, ie without the presence of mixed particles. The samples were analyzed chemically and physically by Scanning Electron Microscopy, Energy Dispersive X-ray (EDS) and chemical analysis. In the modified Hallimond tube, we used the following depressants: Conventional corn starch, cassava starch, potato flour, cassava flour HIPIX®100, HIPIX®101 and HIPIX®102, the dosages 400, 800, 1600, 3200 , 4800 and 6400 (g / t) maintaining fixed collector dosage Flotigam EDA Clariant at a dosage of 70 g / t was observed to influence the dosing of depressant tested in floatability of minerals. There was better efficiency in depressant HIPIX®100, HIPIX®101 and cassava starch. In the flotation cell counter, model engendering power was used with 60% hematite and 40% quartz with high purity. is homogenized and the following pre-depressant was tested: Cassava flour, cassava starch, HIPIX®100, HIPIX®101 and normal corn starch (using it as a comparison), the measurements 400, 800 and 1600 (g / t). This single step in flotation cell bench worked as a rougher stage compared to mining companies. The results of Microflotation and flotation bench were statistically analyzed by analysis of variance (ANOVA), checking variation of doses of depressants are factors that influence the recovery of the mineral compared to conventional corn starch. At this stage, the results prove to be technically possible to replace the corn starch in the flotation cation reverse iron ore, apart from replacing the conventional corn starch was noticed that the performance of some starches leads to a lower specific consumption reagent, which can result in economic and environmental gains.



Minério de ferro, Depressores, Influência de dosagens, Iron ore, Depressants, Influence dosages


SOUSA, N. D. Depressores alternativos na flotação catiônica reversa de minério de ferro. 2016. 106 f. Dissertação (Mestrado Profissional em Gestão Organizacional) - Universidade Federal de Goiás, Catalão, 2016.