A Flotation Technology for Improving Copper-iron Ore Recovery

Abstract

The invention relates to the technical field of mineral processing, in particular to a technology for improving copper and iron ore recycling flotation. Firstly, a crusher is used for conducting crushing treatment on copper and iron ore, a screening machine is used for screening crushed copper and iron ore with the average granularity smaller than 12 mm, then, the manner of combination of gravityclassification of a whirlcone and the forced granularity classification of a high-frequency vibration sieve is adopted for conducting coarse separation and secondary fine classification on the copperand iron ore obtained after ball milling, finally, the technology steps of copper sulfur mixed flotation, copper sulfur separation and iron magnetic separation are adopted for conducting separation treatment on flotation pulp, and copper concentrates with the copper grade larger than 18% and iron concentrates with the iron grade larger than 62% are finally obtained. By means of the technology method, the phenomena that valuable mineral is prone to insufficient grinding and gangue mineral is prone to excessive grinding during copper and iron ore ball milling can be avoided, influences on the flotation recycling rate through gangue mineral fine silt are reduced, the recycling efficiency of target mineral is effectively improved, and economic benefits and social benefits are win-win.

Description

technical field [0001] The invention relates to the technical field of mineral processing, in particular to a flotation technology for improving the recovery of delafospheric ore. Background technique [0002] Both copper and iron play a pivotal role in the national economy, and non-ferrous metal minerals containing both copper and iron are one of the main sources of these two metals. The mineral composition of copper-iron ore is complex, mainly produced in copper-bearing pyrite deposits, and a few in skarn copper deposits. Among them, the main metal minerals of copper-bearing pyrite deposits include chalcopyrite, magnetite, pyrite, pyrrhotite, marcasite, copper blue, chalcocite, and carbonates such as chlorite and dolomite. Salt minerals; the main metal minerals of skarn deposits include gangue minerals such as diopside, garnet, and serpentine. Therefore, copper-iron deposits often contain a large amount of pyrite. The characteristics of copper-iron ore are as follows: t...

AI Technical Summary

Problems solved by technology

Due to the large specific gravity and high hardness of the target minerals in the copper-iron ore, and the small specific gravity and low hardness of the gangue minerals, in the grinding process, the gangues are often ground to form secondary slimes, but the target minerals are not completely crushed. When cyclones or classifiers are used to separate coarse and fine by gravity difference, the "over-grinded" gangue minerals are mixed into the flotation pulp due to their light weight, while the "under-grinded" target minerals are treated as tailings due to their heavy weight. Minerals are separated, thereby affecting the recovery rate of the target minerals, reducing the utilization rate of copper-iron ore resources and the comprehensive benefits of the mine