A method and system for utilizing reverse flotation tail salt foam

Abstract

Disclosed is a utilization method for reverse flotation of tail salt foam. The method includes that raw ore concentration and slurry mixing treatment are carried out on raw ore carnallite, the raw orecarnallite enters a reverse flotation system, and after rough selection and fine selection, obtained potassium chloride slurry enters a subsequent process to obtain the tail salt foam. First step S1,performing primary screening on the tail salt foam to obtain first foam and a first underflow; second step S2, performing secondary screening on the first underflow to obtain second foam and a secondunderflow; third step S3, collecting the first underflow and the second underflow and conveying the first underflow and the second underflow to a subsequent process; and fourth step S4, discharging the first foam into a tail salt pond 4, and conveying the second foam to the reverse flotation system for secondary reverse flotation. The utilization method for reverse flotation of tail salt foam avoids the influence of the first foam recycling on the quality of a final potassium chloride product, improves the yield of potassium chloride, and fully utilize a flotation agent existing in the secondfoam to reduce amount of flotation reagent injected into the reverse flotation system.

Description

technical field [0001] The present invention generally relates to the field of chemical production, and more specifically relates to a method and system for utilizing reverse flotation tail salt foam. Background technique [0002] In the existing potassium fertilizer production industry, the reverse flotation-cold crystallization production process adopted uses carnallite as a raw material to produce potassium chloride. The specific process flow is as follows: image 3 As shown, the raw ore carnallite pulp has been concentrated through raw ore concentration, pulping, reverse flotation, low-sodium carnallite pulp dense dehalogenation, crystallizer decomposition and crystallization, thick potassium dehalogenation of crude potassium slurry, crude potassium repulp washing and refined potassium Centrifuge dehalogenation finally obtains potassium chloride product. [0003] In the existing reverse flotation-cold crystallization production process, the flotation tail salt foam compo...

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved by the present invention is, the first problem: recycle the flotation agent in the reverse flotation tail salt foam, reduce the amount of newly added agent in the reverse flotation system; the second problem: on the premise of not reducing the quality of potassium chloride Next, recover the potassium chloride in the reverse flotation tailing salt foam; the third problem: process the tailing salt foam of different components separately to avoid waste

Images