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Big-open-loop small-closed-loop mud flotation method of oxidized ore

A technology for oxidizing ore and flotation, applied in flotation, solid separation and other directions, can solve the problems of inability to become a product, poor beneficiation index, low concentrate grade, etc., and achieve convenient operation, low production cost, concentrate grade and recovery. high rate effect

Inactive Publication Date: 2013-03-06
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of this type of ore is severely weathered in nature, and there are many primary slimes. In addition, the ore has special properties, such as fragility, and generally produces a lot of secondary slime during ore grinding, such as its whole slime flotation, ore dressing. The indicators are generally very poor. Except for the low grade of the obtained concentrate, it cannot be made into a product, and the recovery rate is generally only about 50%. If desliming flotation is used, although the grade of the concentrate is improved, the recovery rate is often lower

Method used

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  • Big-open-loop small-closed-loop mud flotation method of oxidized ore

Examples

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Effect test

Embodiment 1

[0014] For a low-grade zinc oxide ore, the raw ore pulp contains about 40% mud (less than 10 microns) and about 5% zinc. The zinc minerals are mainly zinc carbonate, zinc silicate, ferrite and hydrozincite. The zinc oxidation rate 60%~95%, gangue minerals are mainly carbonate minerals such as mica and calcite. Whole mud flotation is adopted, and the agent system of vulcanization-xanthate beneficiation or vulcanization-fatty amine beneficiation is used. When the concentration of the selected ore pulp is about 40%, an open-circuit roughing is firstly carried out, and the rough-selected foam product is subjected to an open-circuit selection to obtain the final concentrate. Return in turn to form a closed circuit. The foam in the scavenging 1 is combined with the product in the first-selected tank and then fine-swept twice to obtain the final concentrate, and the product in the tank is returned to the scavenging operation for re-election. The beneficiation index that the zinc oxi...

Embodiment 2

[0016] The zinc oxide ore treated in this example contains only about 2% zinc, and the oxidation rate is 98%. Zinc minerals are mainly zinc carbonate, zinc silicate, ferrite and hydrozincite, and gangue minerals are mainly silicate minerals such as quartz. Whole mud flotation is adopted, and the agent system of vulcanization-xanthate beneficiation or vulcanization-fatty amine beneficiation is used. When the concentration of the selected pulp is about 37%, the grinding fineness is 95%-200 mesh, and the pulp contains about 27% of mud (less than 10 microns). To obtain the final concentrate, the product in the rough-selected tank enters three times of sweeping, and the foam products of the sweeping are returned in turn to form a closed circuit. The final concentrate and the product in the tank are returned to the scavenging operation for re-election. The beneficiation index that the zinc oxide concentrate grade is greater than 35% and the recovery rate is greater than 93% can be...

Embodiment 3

[0018] This example involves whole mud flotation beneficiation of low-grade gneiss scheelite ore. The raw ore grade is about 0.3%. In the case of using conventional scheelite flotation agents, one open-circuit roughing, one open-circuit sweeping, and then directly throw the tailings. The obtained coarse concentrate is subjected to five closed-circuit separations and three fine sweeps. , the ore dressing index with a concentrate grade of more than 60% and a recovery rate of more than 82% can be obtained.

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Abstract

The invention provides a big-open-loop small-closed-loop mud flotation method of an oxidized ore. In the method, during the flotation of the oxidized ore, rough concentration and primary concentration adopt open-circuit flotation and other follow-up flotation operation adopts a normal process. As both the rough concentration and the primary concentration adopt open-circuit flotation without returning middlings, gradual accumulation of slurry in the process is reduced greatly, the interference in the flotation from slurry and the influences of the slurry on the flotation are effectively reduced and the recovery rate of concentrate is guaranteed. A scavenging circuit and a follow-up fine scavenging circuit adopt a normally closed circuit ore dressing flow, the quality of concentrate is guaranteed, and the ore dressing index is improved greatly. In the method, the traditional flotation agent system is not required to be changed, but only the reconnection of ore pulp pipes in the traditional flotation flow is required. And in the method, the operation is convenient, the production cost is low, the quality of the concentrate is high and the recovery rate of the concentrate is high.

Description

technical field [0001] The invention relates to a large open circuit and small closed circuit full mud flotation method for oxidized ore, that is, an ore dressing method adopted in oxidized ore full mud flotation, and belongs to the technical field of ore dressing. Background technique [0002] With the depletion of resources, we will have to select more low-grade and refractory oxide ores, such as: zinc-lead oxide ore, copper oxide ore, scheelite and so on. The commonly used methods to deal with this type of oxidized ore are mainly gravity separation and flotation methods, and the selection index of flotation is usually better than that of gravity separation. Flotation includes full mud flotation and deslimed flotation. However, most of this type of ore is severely weathered in nature, and there are many primary slimes. In addition, the ore has special properties, such as fragility, and generally produces a lot of secondary slime during ore grinding, such as its whole slim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03D1/02B03D1/012B03D103/04
Inventor 刘全军杨道群
Owner KUNMING UNIV OF SCI & TECH
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