Abstract
1. A new class of deflocculants is proposed (esters of polyhydric alcohols and carboxylic acids) for the flotation of nonsulfide minerals from ores by carboxylic acids. 2. The use of esters of xylitol and saturated normal aliphatic C8−C12 acids for the flotation of the nonmagnetic fraction of apatite-carbonate ore will give apatite concentrates with 35–39% P2O5, extraction being 70–83%. Similar results can be obtained with esters of synthetic acids of the C7−C9 fraction. 3. Esters can be used for the flotation of ores containing a considerable amount of clay minerals. 4. The effect of the esters depends on their compositions and structures and is expressed in the specific sorption and hydrophilization of the ore minerals' surfaces by the ester emulsions or suspensions.
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