Separation floatation technology with copper and molybdenum bulk concentrate regrinding omitted

Abstract

The invention discloses a separation flotation technology with copper and molybdenum bulk concentrate regrinding omitted. The technology includes that copper and molybdenum bulk concentrate produced through grinding and floatation of crude ore is subjected to thickening dehydration of two thickeners, underflow is delivered to a surge tank after being subjected to filtration and size mixing of a ceramic filter, and ore pulp in the surge tank no longer enters a regrinding classification system, but is fed into an agitation tank via a pump, and thus is fed into a copper and molybdenum separation flotation process. After the regrinding technology separation process of the copper and molybdenum bulk concentrate is omitted, over-grinding of molybdenum minerals is avoided, operation recovery rate of molybdenum is increased greatly and is increased from 60% when the regrinding technology is used to about 82% after the regrinding is omitted, copper content in the molybdenum concentrate is lowered from original 4-5% to below 1%, molybdenum grade in the molybdenum concentrate is increased from original 45% to 48%, and consumption of copper mineral inhibitors is also reduced.

Description

technical field [0001] The invention belongs to the technical field of mineral processing and relates to a separation and flotation process of mixed concentrate, in particular to a separation and flotation process which cancels the regrinding of copper and molybdenum mixed concentrate. Background technique [0002] The separation process of raw copper and molybdenum in a large porphyry copper-molybdenum mine is mixed flotation coarse concentrate and three times of beneficiation to produce qualified copper-molybdenum mixed concentrate, which is concentrated and dehydrated by a thickener, and the underflow of the thickener is directly fed into the The grinding and grading system composed of two-stage ball mill and cyclone, the cyclone overflow product (-325 mesh accounts for about 88%) enters the separation and flotation operation to obtain copper and molybdenum concentrates. Copper concentrate products are filtered using a pressure filter. This process adopts all the regrind...

AI Technical Summary

Problems solved by technology

[0003] (1) Difficulty in filtering copper concentrate: due to the change of the particle size composition of the mixed concentrate due to the adoption of the regrinding and grading system, the -400 mesh mineral content in the material is relatively high, resulting in a low efficiency of the pressure filter for filtering the copper concentrate, which is prone to Cause the thickener to press the rake, and the separation and flotation operations frequently stop

[0004] (2) The recovery rate of molybdenum is low: due to the regrinding operation, some fine-grained useful minerals are over-grinded, resulting in serious muddying, and the recovery rate of molybdenum is low

[0005] (3) The quality of copper in molybdenum concentrate is high: due to the regrinding operation, the copper and molybdenum minerals in the mixed concentrate are too fine, resulting in the copper content of molybdenum concentrate exceeding the standard, and sometimes the copper content in molybdenum concentrate is as high as 5%, the inhibition of copper is poor and the consumption of inhibitor is increased

[0006] (4) The technological process is relatively complicated: regrinding will increase energy consumption and production costs, and the cyclone feed pump has a high failure rate and frequent clogging, resulting in discontinuous and unstable materials fed into the separation operation

[0007] The above problems restrict the continuous and stable operation of the copper-molybdenum separation process and the improvement of technical indicators

Images