CAPSULE SLOW-RELEASE COLLECTOR FOR COAL FLOTATION, AND PREPARATION METHOD THEREFOR AND APPLICATION THEREOF

Disclosed in the present invention are a capsule slow-release collector for coal flotation, and a preparation method therefor and an application thereof. Components of the collector comprise a collecting agent, a functional agent, and an emulsifier; components of the collecting agent comprise diesel oil, pine oil, and an oleic acid-based ester; the functional agent is prepared by mixing a sodium silicate solution and a sulfuric acid solution in proportion; the emulsifier is a nonionic surfactant. Compared with a conventional collector, the capsule slow-release collector in the present invention has a special capsule structure and has double functions of collection and selective inhibition; when the collector capsule shell interacts with hydrophobic sites of coal molecules, the original capsule structure collapses, and the inhibitor component in the capsule core is released; when the collector does not interact with coal molecules, the inhibitor is temporarily stored in the collector. Slow release of the inhib