Carbonate-type collecting agent reverse flotation drug and preparation method thereof

The invention relates to a carbonate-type collecting agent reverse flotation drug and a preparation method thereof. The preparation method comprises the following steps: (1) taking low erucic acid rapeseed oil alkali refining and deacidification niger and short carbon chain fatty acids (6-14 carbon) as collecting agent raw materials; (2) taking mixed alcohols and 1,1,3-triethyl orthobutyrate as foaming agents; (3) mixing the collecting agent raw materials with excessive amounts of alkalies and a certain amount of water, reacting for 1.5 h in a reaction kettle at 80-100 DEG C, reducing the temperature of a reaction liquid to be 40-70 DEG C, adding the foaming agents, and continuously stirring for 30 min, so as to obtain the finished product, namely the collophanite reverse flotation drug, wherein the mass ratio of the collecting agents to the foaming agents in the finished product, namely the reverse flotation drug, is (7-9):1. The carbonate-type collecting agent reverse flotation drug and the preparation method have the advantages that the flotation performance of the low erucic acid rapeseed oil alkali refining and deacidification niger and the short carbon chain fatty acids in the carbonate-type collophanite reverse flotation operation can be improved remarkably, the flotation recovery rate and the concentrate grade are improved remarkably, and low-cost industrial greasy leftovers are sufficiently utilized.