Separation method for flake graphite based on air flow separation and flotation

Abstract

The invention relates to a separation method for a flake graphite ore and belongs to the technical field of mineral processing. The separation method is conducted according to the following steps that graphite ore materials are fed into a sieving machine to be graded, and oversize coarse-grained products and undersize fine-grained products are separated; the oversize coarse-grained products are fed into a crusher to be crushed to obtain crushed materials; the crushed materials are mixed with the undersize fine-grained products to obtain mixed materials; the mixed materials are fed into an air flow separator to be separated, and coarse concentrate and coarse tailings are obtained; the coarse concentrate is fed into a large flake graphite flotation system to be finely separated, and large flake graphite concentrate and middling products are separated; the middling products and the coarse tailings are mixed and fed into an ore grinding machine to be subjected grinding-up treatment, and ground coarse tailing products are obtained; and the crushed coarse tailing products are fed into a small flake graphite flotation system to separate fine-grained graphite concentrate and tailings. Compared with the prior art, the separation method for the flake graphite ore based on the air flow separator and a flotation machine has the characteristics of being high in protection efficiency of graphite piece diameters, little in investment, little in environmental pollution, remarkable in economic benefit and the like.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a flake graphite sorting method based on airflow sorting and flotation. Background technique [0002] my country is rich in graphite resources, and the reserves and output of flake graphite rank among the top in the world. Because flake graphite has a layered structure, it has excellent heat resistance, stability, electrical conductivity and lubricating properties. It is widely used in metallurgy, national defense and aerospace and other fields, and has great industrial value. [0003] Flake graphite has strong natural hydrophobicity and good buoyancy. At present, flotation is mainly used to recover graphite products from natural ores. In view of the low content of large flake graphite in natural ores, and in order to avoid excessive damage to large flake graphite during the sorting process, graphite concentrators in my country mostly use multi-stage grind...

AI Technical Summary

Problems solved by technology

However, the process of multi-stage grinding and multi-stage flotation is complicated, and its management and production costs are high; at the same time, the multi-stage grinding process will also destroy graphite flakes, reduce the yield of flake graphite, and reduce the profit margin of enterprises

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