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Floating selection method of nonferrous metal mineral powder

A technology for non-ferrous metals and ore powder, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of high steel consumption, large water consumption, and high power consumption of ball mills

Inactive Publication Date: 2012-12-12
CHENGDU LEEJUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this process are (1) the high power consumption of the ball mill, which requires an average of 15-20 kilowatt-hours of electricity per ton of ore processing; (2) the high steel consumption of the ball mill, which requires an average of 0.8 steel balls and liners per ton of ore processing ~1.5kg
This patent is applicable to the beneficiation of all non-ferrous metal ores, especially suitable for raw ore containing water and mud. However, in arid and water-scarce areas, the promotion of this method has been limited due to the large amount of water.

Method used

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  • Floating selection method of nonferrous metal mineral powder
  • Floating selection method of nonferrous metal mineral powder
  • Floating selection method of nonferrous metal mineral powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] For a molybdenum ore in Henan with a raw ore Mo grade of 0.13%, it is roughly crushed to 250mm by a crusher, screened, and crushed to less than 60mm, and fed into a high-pressure roller mill. The high-pressure roller mill controls the projection pressure to 3.5MPa~5.5MPa , the fan speed is controlled at 45Hz, the rotor powder separator speed is 35Hz, the cyclone product -0.074mm accounted for 60% of the product is fed into the slurry mixer, and then flotation is carried out, after a rough selection, three times of sweeping, and five times of selection A concentrate with a Mo grade of 45% and a Mo grade tailings with a Mo grade of 0.012% are obtained. The bottom coarse material of the V-type separator is returned to the high-pressure roller mill through the hoist for regrinding to form a closed circuit.

Embodiment 2

[0022] For a copper mine in Inner Mongolia with a raw ore grade of 1.5% Cu, it is roughly crushed by a crusher to 200mm, screened, and crushed to less than 40mm, and fed into a high-pressure roller mill. The high-pressure roller mill controls the projection pressure to 3.5MPa~5.5MPa , control the speed of the fan to 40Hz, the speed of the rotor powder separator to 45Hz, and the cyclone product -0.074mm accounts for 80% of the product to be added to the slurry mixer, followed by flotation, after a rough selection, two sweeps, and three fines The concentrated ore with a Cu grade of 20% and the tailings with a Cu grade of 0.11% are obtained. The coarse material at the bottom of the V-type separator is returned to the high-pressure roller mill through the elevator to form a closed circuit.

Embodiment 3

[0024] For a copper mine in Tibet with a raw ore grade of 1.5% Cu, it is roughly crushed by a crusher to 300mm, screened, and crushed to less than 45mm, and fed into a high-pressure roller mill. The high-pressure roller mill controls the projection pressure to 3.5MPa~5.5MPa , control the speed of the fan at 45Hz, the speed of the rotor powder separator at 50Hz, and the cyclone product -0.074mm accounts for 90% of the product to be added to the slurry mixer, and then flotation, after a rough selection, two sweeps, and three fines The concentrated ore with a Cu grade of 18.7% and the tailings with a Cu grade of 0.07% are obtained. The coarse material at the bottom of the V-type separator is returned to the high-pressure roller mill through the elevator to form a closed circuit.

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Abstract

The invention discloses a floating selection method of nonferrous metal mineral powder and belongs to the field of a mineral powder floating selection method. The floating selection method of the nonferrous metal mineral powder sequentially comprises the following steps of: roughly crushing raw ores to 200-350 mm and sieving; sieving and intermediately crushing a product on a sieve; feeding a product with the size in a range from minus 30 mm to minus 60 mm below the sieve and grading by air power so that the product fineness is controlled to minus 0.074 mm and is 50-90%; returning a rough grain grade product back to a high-pressure roller mill to form a closed path; and carrying out floating selection on a fine grain grade product to finally obtain a concentrate ore and tailings. The invention provides a novel non-ferrous ore anhydrous wet-type powder milling-wet type floating selection process to overcome the disadvantages of the existing non-ferrous ore selection process and the application limitation of drought water-deficient areas.

Description

technical field [0001] The invention belongs to the field of ore grinding and flotation methods, in particular to the grinding and flotation of nonferrous metal ores. Background technique [0002] At present, the non-ferrous metal ore beneficiation production process mainly includes four stages: crushing, grinding, flotation, and product treatment. Among them, the crushing section is to process the -1000mm or larger raw ore through the primary crushing operation of the gyratory crusher or jaw crusher, the secondary crushing operation of the standard cone crusher, and the short head cone crusher or impact crusher, hammer The powder ore below -20mm is obtained through the fine crushing operation of the type crusher, and then the powder ore bin is fed into the ball mill for grinding, sorting and product processing operations. Among them, the power consumption and steel consumption of crushing and grinding account for 50-70% of the total power consumption and total steel consum...

Claims

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Application Information

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IPC IPC(8): B03B7/00B03B1/00
Inventor 何亚民魏勇徐智平
Owner CHENGDU LEEJUN TECH CO LTD
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