High-selectivity flocculating agent for separating hematite and preparation method thereof

Abstract

The invention relates to a high-selectivity flocculating agent for separating hematite and a preparation method thereof. The flocculating agent comprises starch, sodium hydroxide, acrylamide, an initiating agent and a solvent in parts by weight. The preparation method comprises the following steps of: adding the starch and distilled water in parts by weight into a four-port flask, and introducing nitrogen for gelatinization; then, adding the sodium hydroxide to causticize the starch, adding cerium ammonirm nitrate for carrying out nitric acid reaction, adding acrylamide for reaction, and cooling to room temperature to obtain a graft copolymer; transferring the graft copolymer, adding anhydrous acetone, stirring, filtering, and drying the graft copolymer to constant weight in a vacuum drying oven; taking out the dried graft copolymer, refluxing with a mixture solvent of acetic acid and ethylene glycol to constant weight, and drying precipitate; and finally, drying filtrate to obtain pure finished flocculating agent. Shown by tests and calculation, the maximum adsorption capacity of the flocculating agent on the surface of hematite can reach 52 percent. The flocculating agent has high selectivity to hematite.

Description

technical field [0001] The invention relates to a flocculant and a preparation method thereof, in particular to a highly selective flocculant for sorting hematite and a preparation method thereof. Background technique [0002] The characteristics of fine-grained hematite are small particle mass, large specific surface area, large surface energy, high surface activity, difficult to completely disperse, and easy muddying. The amount of medicine used in flotation is large, and it is difficult to separate. For fine-grained hematite The selective flocculation of the ore slurry is to change the surface properties of the hematite particles and increase the particle size appropriately, thus flocculating and settling to achieve the purpose of separating from the gangue minerals. [0003] Selective flocculation is a new process developed in the 1960s, with the purpose of more effectively sorting fine-grained minerals. Selective flocculation is the flocculation of one mineral from a f...

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Problems solved by technology

[0004] There is no report on the flocculant used for high selectivity of hematite after searching, and there is no report on the preparation method of flocculant with high selectivity of hematite