Method for recycling waste water in collophanite double-reverse flotation process according to different qualities

Abstract

The invention provides a collophanite double-reverse flotation process wastewater quality-based recycling method, and the method comprises the following steps: grinding collophanite, performing reverse flotation of silicate mineral removal on graded overflow to obtain tailings and rough concentrate, feeding the tailings into a tailing thickener for thickening, and filtering to obtain tailings; enabling the rough concentrate to enter an intermediate thickener to be thickened, performing filtering, performing size mixing on a filter cake obtained after filtering, performing reverse flotation forremoving carbonate minerals again, and obtaining tailings and concentrate pulp; thickening the tailings by a tailing thickener, and performing filtering to obtain tailings; thickening the concentratepulp by a concentrate thickener and then performing filtering to obtain concentrate. Reverse flotation for removing silicate minerals is carried out under the alkaline condition that the pH value is8.5-9.5, and an amine cation collecting agent is added; reverse flotation for removing carbonate minerals is carried out under the acidic condition that the pH value is 4.0-5.0, and a fatty acid anioncollecting agent is added. The method creates a scientific and economic industrial implementation scheme for dual reverse flotation of collophanite.

Description

technical field [0001] The invention belongs to the field of collophosite ore dressing, and relates to a method for separating and reusing waste water in the double-reverse flotation process of collophanite, and is also applicable to the double-reverse flotation in which silicate minerals are removed first and carbonate minerals are removed process and the double reverse flotation process that first removes carbonate minerals and then removes silicate minerals. Background technique [0002] The collophosite double reverse flotation process has not been widely used at present, mainly because the cationic foam is difficult to control and the selectivity is poor in practice. At the same time, in the conventional double-reverse flotation of collophosite, the reverse flotation for silicate removal is neutral and alkaline and contains cationic collectors, and the reverse flotation for carbonate removal is acidic and contains anionic collectors. The mixed reuse of different waste ...

AI Technical Summary

Problems solved by technology

[0004] 1. The consumption of phosphoric acid (or sulfuric acid) and sodium carbonate (or lime, sodium hydroxide) is large, which greatly increases the cost of beneficiation;

[0005] 2. Due to the interference of cationic collectors, the amount of anionic collectors during desalination increases significantly, and the beneficiation indicators are affected;

[0006] 3. The cations enter the entire return water system, making it difficult to control the foam in the entire double-reverse process, seriously affecting the stability of the process and the intensity of production operations

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