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Active flotation method for refractory sulfide mineral in oxidized-sulfide mixed ore

A technology of mixing ore and minerals, applied in flotation, solid separation, etc., can solve the problems of unselectable, low flotation recovery rate and poor effect of sulfide minerals, and achieve the effect of improving the recovery rate

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

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Problems solved by technology

However, when the ore structure is relatively complex, sulfide minerals and oxidized minerals are closely symbiotic, or are wrapped by oxidized minerals, and it is difficult to dissociate oxidized minerals and sulfide minerals during the grinding process, the beneficiation and recovery of sulfide minerals becomes very difficult. At this time, if the sulfidation flotation method is continued to be used for beneficiation, not only the effect is poor, but also the sulfidation agent will also inhibit the sulfide minerals, resulting in an extremely low flotation recovery rate of the sulfide minerals, and even cannot be selected.

Method used

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  • Active flotation method for refractory sulfide mineral in oxidized-sulfide mixed ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Raw ore composition: Zn 9.25%, Pb 1.87%, Fe 6.58%, CaO 1.35%, MgO 0.55%, SiO 2 33.71%, zinc oxidation rate 26.78%, lead oxidation rate 18.53%, belonging to lead-zinc mixed ore.

[0024] Above-mentioned raw ore is passed through following processing steps:

[0025] (1) Wet grinding the raw ore to a pulp with a fineness of less than 74 μm, accounting for 84.95%;

[0026] (2) adding sulfuric acid with a concentration of 4.5% to pH=2.5 in the pulp of the above (1) step, stirring and dissolving for 12 minutes;

[0027] (3) Add sodium sulfide in the amount of 245g / t raw ore to the slurry in the above (2) step, and add milk of lime to adjust slurry to slurry pH=9.5;

[0028] (4) Adopt the flow process that prior art is carried out flotation to lead-zinc mixed ore, after the ore pulp of above-mentioned (3) step is carried out flotation, get concentrated ore, wherein, the total dosage of medicament is: mixed collector isobutyl yellow The medicine is added in the amount of 30...

Embodiment 2

[0031] Raw ore composition: Cu 1.05%, CaO 21.84%, MgO 17.46%, SiO 2 8.72%, Fe 4.19%, copper oxidation rate 25.56%, binding rate 7.67%, belonging to high calcium and magnesium mixed copper ore.

[0032] Above-mentioned raw ore is passed through following processing steps:

[0033] (1) Wet grinding the raw ore to a pulp with a fineness of less than 74 μm, accounting for 90.23%;

[0034] (2) Add ammoniacal liquor and ammonium bicarbonate to the pulp total ammonia concentration 1.5mol / L in the pulp of above-mentioned (1) step, wherein the molar concentration ratio of ammoniacal liquor and ammonium bicarbonate is 2: 1, stirring and dissolving for 20 minutes;

[0035] (3) Add sodium hydrosulfide in the amount of 420g / t raw ore in the slurry of the above-mentioned (2) step, and add lime to adjust slurry to slurry pH=9.5;

[0036] (4) After the ore pulp of above-mentioned (3) step is carried out to flotation by adopting the stage grinding concentrated flotation flow process of prio...

Embodiment 3

[0039] Raw ore composition: Cu 1.14%, SiO 2 36.49%, CaO 6.43%, MgO 2.68%, Al 2 o 3 18.57%, Fe 3.54%, copper oxidation rate 15.78%, belonging to high silicon mixed copper ore.

[0040] Above-mentioned raw ore is passed through following processing steps:

[0041] (1) Wet grinding the raw ore to a pulp with a fineness of less than 74 μm, accounting for 88.56%;

[0042] (2) adding sulfuric acid with a concentration of 3.5% to pH=2.9 to the pulp in the above (1) step, stirring and dissolving for 10 minutes;

[0043] (3) Add calcium sulfide in the amount of 220g / t raw ore to the slurry in the above (2) step, and add lime milk to adjust the slurry to pH=9.8;

[0044] (4) After the ore slurry of (3) step is carried out to flotation by adopting the stage grinding and stage flotation processes of the prior art, concentrate ore is obtained, wherein the total dosage of medicament is: collector isobutyl xanthate by 445g / t The amount of raw ore is added, the adjusting agent sodium s...

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Abstract

The invention provides a method for the active flotation of difficult-to-float sulfide minerals from sulfide-oxidized mixed ores, which is characterized in that a concentrate is obtained through the steps of wet grinding of ores, dissolution of the grinded ores in acid or ammonia and ammonium salt solution, activation and flotation. Paragenetic or covering oxidized minerals in the mixed ores are dissolved first and then the surfaces of the ores are activated and the absorption activation centers of the surface of the ores are increased, so that the action between the surfaces of the ores and a flotation reagent in the following flotation process such as collection, adjustment and bubbling is strengthened, the active flotation of the difficult-to-float sulfide minerals is realized and the recovery efficiency of the sulfide minerals can be obviously increased by a simple reagent system.

Description

technical field [0001] The invention relates to a beneficiation method, in particular to an activated flotation method for refractory sulfide minerals in a sulfide-oxidation mixed ore, and belongs to the technical field of nonferrous metal ore beneficiation. Background technique [0002] For copper, lead, zinc polymetallic ore or copper, zinc monometallic ore, it is usually processed by flotation. In the flotation process, for copper, lead, zinc polymetallic ore, in addition to the separation of metal minerals and gangue, there is also the separation of copper, lead, zinc and other metals. The monometallic ore mainly has the problem of separation of metal minerals and gangue. Generally speaking, the sulfide minerals in the ore are easier to float than the oxide minerals, but when the ore is oxidized to a certain extent, not only the oxide minerals, but also the sulfide minerals are also difficult to select, especially the symbiotic or oxidized minerals Encased sulfide mine...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00B03B1/00B03B1/04B03D1/004B03D103/02B03D101/04B03D101/02
Inventor 张文彬刘殿文胡显智孙力军章晓林字富庭方建军张景绘李明晓魏志聪徐翔许炳梁
Owner KUNMING UNIV OF SCI & TECH
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