Flocculation desliming and alkaline flotation method of high-ferrous ore fine particle products

Abstract

The invention relates to a flocculation desliming and alkaline flotation method of high-ferrous ore fine particle products. The method comprises the step that sorted materials of raw ore subjected to ore grinding is fed to a one-stage thickness grading whirlcone for grading operation. The method is characterized in that setting sand of the one-stage thickness grading whirlcone is fed to a reselection process for sorting, overflows of the one-stage thickness grading whirlcone are fed to a two-stage thickness grading whirlcone for sorting operation, graded settling sand of the two-stage thickness grading whirlcone is fed for acid direct flotation operation, overflows of the two-stage thickness grading whirlcone are fed to a tilting narrow flow grading machine for desliming grading operation, greater than 19mum of coarse particle products subjected to desliming grading by the tilting narrow flow grading machine and coarse finished ore A subjected to acid direct flotation are combined and are fed for sorting operation of the acid direct flotation, the once-coarsing once-refining twice-sweeping acid reverse flotation process sorting is carried out, acid reverse flotation finished ore and acid reverse flotation tailings are sorted. The method has the advantage that because the process is adopted, the technical index of the ore dressing of the high-ferrous ore fine particle products is greatly improved.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a method for flocculation, desliming and alkaline flotation of high-ferrous ore fine-grained products. Background technique [0002] For a long time, the beneficiation technical indicators of high-ferrous ore, including hematite, magnetite, siderite, limonite and other iron minerals, have not been high, especially for the fine-grained part of its grinding products, most of which use Stage grinding, coarse and fine separation, gravity separation - strong magnetic - reverse flotation process and flocculation desliming reverse flotation process, the specific process is as follows figure 1 As shown, the raw ore enters the closed-circuit grinding composed of a primary ball mill and a primary classifier, and the overflow of the classifier is classified into coarse and fine materials by the coarse and fine grading cyclone, and the coarse material of the cyclone en...

AI Technical Summary

Problems solved by technology

When the magnetic content of the ore is high, the process has less tailings, and the extremely poor magnetic and larger particles are easy to enter the flotation operation, resulting in a decline in the grade of the concentrate

When the content of siderite is high, the grade of the strong tail is high due to the serious muddying of the material, and the metal loss is serious

At the same time, siderite has a great impact on the separation of flotation operations, the medium ore drops out of the tank, and the indicators deteriorate, which affects the benefits of the concentrator

Images