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Method for improving grade of copper-molybdenum separated molybdenum concentrate of skarn copper-molybdenum ore

A technology of skarn copper-molybdenum and copper-molybdenum mixed concentrate, which is applied in the field of molybdenum coarse concentrate regrinding and copper-molybdenum mixed concentrate pre-selection, can solve the problem of low molybdenum grade and achieve the effect of improving the grade of molybdenum

Active Publication Date: 2017-02-15
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0032] The invention provides a method for improving the grade of skarn copper-molybdenum ore copper-molybdenum separation molybdenum concentrate to solve the problem that the molybdenum grade of copper-molybdenum mixed concentrate copper-molybdenum separation molybdenum concentrate is still low after multiple selections. The method of adding inhibitor and dispersant to the mixed concentrate and regrinding ball mill, and flotation pretreatment can greatly improve the grade of molybdenum concentrate

Method used

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  • Method for improving grade of copper-molybdenum separated molybdenum concentrate of skarn copper-molybdenum ore
  • Method for improving grade of copper-molybdenum separated molybdenum concentrate of skarn copper-molybdenum ore
  • Method for improving grade of copper-molybdenum separated molybdenum concentrate of skarn copper-molybdenum ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Include the following steps:

[0062] (1) Regrinding of copper-molybdenum mixed concentrate produced by mixed flotation of raw ore:

[0063] The grinding particle size is -0.074mm, and the mass percentage content is above 95%. Add 1000g / t of sodium silicate and 4000g / t of sodium hydrosulfide to the ball mill for grinding; The amount of addition of each agent in the following steps is also relative to the copper-molybdenum mixed concentrate;

[0064] (2) Pre-selection of mixed concentrate:

[0065] Adjust the mass percentage concentration of the pulp in step (1) to 28%; pre-roughing: stir for 3 minutes, and the time is 6 minutes to obtain the pre-selected coarse concentrate; pre-sweeping one: add kerosene 50g / t, and the action time is 3 minutes ; Then add sodium hydrosulfide 2000g / t, the action is 5 minutes, the flotation time is 5 minutes, the foam returns to the pre-roughing operation; pre-sweeping two: add kerosene 25g / t, the action time is 3 minutes; then add hydro...

Embodiment 2

[0073] Include the following steps:

[0074] (1) Regrinding of copper-molybdenum mixed concentrate produced by mixed flotation of raw ore:

[0075] The grinding particle size is -0.074mm, and the mass percentage content is above 95%. Add 1250g / t of sodium silicate and 4500g / t of sodium hydrosulfide to the ball mill for grinding; The amount of addition of each agent in the following steps is also relative to the copper-molybdenum mixed concentrate;

[0076] (2) Pre-selection of mixed concentrate:

[0077] Adjust the mass percentage concentration of the pulp in step (1) to 33%; pre-roughing: stir for 3 minutes, and the time is 6 minutes to obtain the pre-selected coarse concentrate; pre-sweeping one: add kerosene 50g / t, and the action time is 4 minutes ; Then add sodium hydrosulfide 2000g / t, the effect is 8 minutes, the flotation time is 5 minutes, the foam returns to the pre-roughing operation; pre-sweeping two: add kerosene 25g / t, the action time is 4 minutes; then add hydro...

Embodiment 3

[0085] Include the following steps:

[0086] (1) Regrinding of copper-molybdenum mixed concentrate produced by mixed flotation of raw ore:

[0087] The grinding particle size is -0.074mm, and the mass percentage content is above 95%. Add 1500g / t of sodium silicate and 5000g / t of sodium hydrosulfide to the ball mill for grinding; The amount of addition of each agent in the following steps is also relative to the copper-molybdenum mixed concentrate;

[0088] (2) Pre-selection of mixed concentrate:

[0089] Adjust the mass percentage concentration of the pulp in step (1) to 38%; pre-rough selection: stir for 3 minutes, and the time is 6 minutes to obtain the pre-selected coarse concentrate; pre-sweeping one: add kerosene 50g / t, and the action time is 5 minutes ; Then add sodium hydrosulfide 2000g / t, the effect is 10 minutes, the flotation time is 5 minutes, the foam returns to the pre-roughing operation; pre-sweeping two: add kerosene 25g / t, the action time is 5 minutes; then a...

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Abstract

The invention relates to a method for improving the grade of copper-molybdenum separated molybdenum concentrate of skarn copper-molybdenum ore and belongs to a method for copper-molybdenum separation of skarn copper-molybdenum ore to obtain molybdenum concentrate. The method is characterized in that an inhibitor and a dispersant are added into a bulk concentrate regrinding ball mill to improve the monomer separation degree of molybdenum ore, meanwhile, the inhibitor and the dispersant immediately act on fresh surfaces of copper ore and gangue mineral which are produced through regrinding to enhance the chemical function, the milling grade of copper-molybdenum separated molybdenum is improved, and over-ground gangue mineral is thrown out as soon as possible, so that the implementation of copper-molybdenum separation and the grade improvement of the molybdenum concentrate are both facilitated. By adoption of the method, good copper-molybdenum separated floatation indexes are acquired, and the grade of molybdenum is remarkably improved.

Description

technical field [0001] The invention belongs to a method for separating molybdenum concentrate from skarn copper-molybdenum ore, and particularly relates to the regrinding of copper-molybdenum mixed concentrate and the addition of inhibitors and dispersants in the regrinding ball mill, pre-selection of copper-molybdenum mixed concentrate, molybdenum coarse Concentrate regrinding method. Background technique [0002] Skarn copper-molybdenum ore has low molybdenum grade and high secondary copper content, and the gangue minerals are mainly wollastonite, andandrite, calcite, etc.; the secondary copper minerals are difficult to be suppressed, and the veins Ore minerals are easy to muddy during the grinding process, which seriously deteriorates the environment of copper-molybdenum separation and flotation, making it difficult to produce higher-grade molybdenum concentrates from copper-molybdenum separation. [0003] At present, there are mainly two schemes for separating copper-m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03D1/02B03D1/002B03B1/00B03B1/04B03D101/06B03D103/04
CPCB03B1/00B03B1/04B03D1/00B03D1/002B03D1/02B03D2201/005B03D2201/06B03D2203/04
Inventor 张磊王怀孙东阳郑晔郝福来
Owner CHANGCHUN GOLD RES INST
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