Flotation separation method of low / extra-low grade copper-molybdenum ore or chat

Abstract

The invention discloses a flotation separation method of low / extra-low grade copper-molybdenum ores or chats. The raw material is smashed until the fineness of the raw material is 0.074 mm, the occupying rate ranges from 50% to 80%, the raw material is prepared into ore pulp with the weight ranging from 25% to 40%, the PH value of lime is adjusted and ranges from 7 to 9, and then copper-molybdenum bulk flotation and rougher flotation are conducted by a flotation machine, so that copper-molybdenum bulk flotation rough concentrate is acquired; the copper-molybdenum bulk flotation rough concentrate is smashed until the fineness of the copper-molybdenum bulk flotation rough concentrate is 0.043 mm, the occupying rate ranges from 50% to 80%, and the copper-molybdenum bulk flotation rough concentrate is prepared into ore pulp with the weight ranging from 20% to 35%; a flotation column is adopted to conduct the detailed flotation of the copper-molybdenum bulk flotation, and copper-molybdenum bulk concentrate is acquired, the copper-molybdenum bulk concentrate is re-smashed until the until the fineness of the copper-molybdenum bulk concentrate is 0.038 mm, the occupying rate ranges from 70% to 90%, and the copper-molybdenum bulk concentrate is prepared into ore pulp with the weight ranging from 15% to 30%; the flotation column is used for conducting the rougher flotation of copper-molybdenum, one or more times of flotation on the occupied copper rough concentrate and molybdenum rough concentrate are conducted by the flotation machine / flotation column, and the final copper concentrate and molybdenum concentrate are acquired. The flotation separation method can deal with extra-low hard-flotation copper-molybdenum ores or chats with the copper grade lower than 0.2% and the molybdenum grade lower than 0.01%, and the copper concentrate with the copper grade higher than 23% and the molybdenum concentrate with the molybdenum grade higher than 43% are acquired.

Description

technical field [0001] The invention relates to a flotation separation method for low-grade and / or extra-low-grade copper-molybdenum ores or mine waste rocks, which can handle copper-containing <0.4%, molybdenum <0.03%, especially copper-containing <0.2% %, molybdenum <0.01% ultra-low grade refractory copper-molybdenum ore or mine waste rock discarded by mining, and obtain copper concentrate with copper grade > 23% and / or molybdenum concentrate with molybdenum grade > 43%. Background technique [0002] The commonly used method to obtain copper concentrate and molybdenum concentrate from copper-molybdenum ore dressing is flotation. The current flotation equipment mainly includes flotation machines and flotation columns. The flotation machine has the advantages of strong stirring power, large air volume, strong capture power and easy adjustment; the flotation column has the advantages of high enrichment ratio, simple structure and power saving, especially fo...

AI Technical Summary

Problems solved by technology

In addition, because the flotation column does not have the strong stirring and capturing power of the flotation machine, the minerals are less likely to be scrubbed and contacted with the beneficiation agent, so the copper and molybdenum minerals with poor floatability are easy to fall into the tail of the flotation column. Even if the flotation machine is used to scavenge it, it will fall into the tailings due to insufficient flotation time—unless the number of flotation machines used for scavenging is increased at the cost of increasing energy consumption—so it adopts The method of roughing with flotation column and sweeping with flotation machine is unreasonable, and also violates the original intention of using flotation column to save energy

Especially for copper-molybdenum ore with molybdenum grade < 0.01% ore or mine waste rock discarded in mining, when using flotation column to directly produce molybdenum concentrate, the molybdenum concentration yield is small, and its foam layer is not easy to control and adjust, and it is difficult to obtain high-quality molybdenum concentrate

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