Disclosed are a composite collector for low-and-medium-temperature
phosphate flotation and a preparation method thereof. The composite collector is composed of 100 parts of
carboxylic acid collector, 50-100 parts of
hydrocarbon type oil, 1-10 parts of non-ionic surface
active agent, 1-10 parts of anionic surface
active agent and 80-200 parts of water, wherein the
carboxylic acid collector serves as the main collector, the
hydrocarbon type oil serves as the auxiliary collector, the non-ionic surface
active agent serves as the synergist, and the anionic surface active agent serves as the emulsifier. The preparation method includes steps of uniformly mixing and stirring the components according to the proportion in the speed of 300-1500rad / min at the temperature
ranging from 40DEG C to 80 DEG C to obtain the composite collector for low-and-medium temperature
phosphate flotation. When in use of the composite collector, the composite collector is added into a pulp mixing
barrel to be mixed with pulp sufficiently according to dosage directly, so that floatation can be carried out in a floatation trough at the normal temperature and the operation of heating to pulp is omitted. The composite collector has the advantages that better low-and-medium-temperature flotation effect can be achieved, bubbles generated by the composite collector are favorable for concentrate deposition, the
chemical agent usage is small, raw materials for the composite collector are wide in sources, and the composite collector is moderate in price.