A kind of phosphate rock flotation method and system

Abstract

The invention discloses a floatation method and a flotation system for floating and separating gangue minerals from collophanite. A phosphate ore floatation method comprises the following steps: before ore slurry enters a floatation column, a rotational flow foaming and mineralization pre-treating process is carried out; the rotational flow foaming and mineralization pre-treatment is used for enabling the ore slurry and compressed air to be jet into a cylindrical barrel body of a rotational flow foaming and mineralization device along the tangential direction to do vortex movement to form a rotational flow; bubbles are dispersed into the ore slurry and are mineralized by cutting and agitation of blades in the barrel body. The barrel body of the rotational flow foaming and mineralization device is the combination of a hollow cone and a cylinder; the blades are distributed in the cylindrical barrel body along the radial direction; a feeding opening of the rotational flow foaming and mineralization device is arranged along the tangential direction of the cylindrical barrel body; a discharging pipe is arranged at a conical end. According to the floatation method and the flotation system, the bubbles can be dispersed into the ore slurry sufficiently before flotation and are mineralized rapidly, the blocking of a foaming device can be avoided, the height of the floatation column is reduced, and a good separation environment is created for the flotation process.

Description

technical field [0001] The invention relates to a flotation method and a flotation system, in particular to a flotation method and system for flotation and separation of gangue minerals by collophanite. Background technique [0002] Phosphate rock is an important mineral resource that is indispensable for the production of inorganic phosphate fertilizers and other phosphorus chemical products, but is not renewable and replaceable. China's phosphate rock resource reserves rank among the top in the world, but most of them are low-grade and medium-grade collophosphine that are difficult to select. Only through mineral processing and enrichment can they meet the standards for the production of phosphorus chemical products. [0003] Flotation is the most effective beneficiation method for collophosite. However, the characteristic of collophanite is that the phosphorus-containing minerals are in the form of "colloidal" amorphous fine-grained aggregates closely symbiotic with impu...

AI Technical Summary

Problems solved by technology

Although fine-grained minerals and micro-bubbles have a large surface area, their collision momentum is still small in the static flow environment of the flotation column, and the probability of sticking to each other through collisions to break through the hydration film is small. In addition, the flotation of phosphate rock uses fatty acid collectors, which have relatively poor solubility and dispersibility and flotation selectivity, so that the floatability of phosphate rock itself is not very good, and the impact on the mineralization speed of air bubbles is more obvious

(3) In order to ensure the time required for the mineralization of bubbles, the height of the flotation column is generally relatively high, which inevitably leads to uneven distribution of gas and liquid in the flotation column, the flotation conditions are not easy to control, and the bubbles are easy to float in the floating process. Merge or break up in the middle, resulting in the so-called "turning flowers" and "ditching" phenomena

Although filling the flotation column with an appropriate medium can control the gas-liquid distribution in the column, overcome the merger and rupture of bubbles, and avoid the phenomenon of "turning flowers" and "channeling", but the replacement and maintenance of the filling medium is inconvenient and the passage is easy. Blocked by slime, and the reduction of the effective volume of the column will also affect the processing capacity of the equipment

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