A method of activated flotation of sulfide minerals suppressed by cyanide ions

A cyanide ion and mineral technology, applied in the field of activation flotation of sulfide minerals, can solve problems such as difficult to achieve chemical activation effect of agents, complex process flow, high risk, etc., and achieve high-quality, The effect of high recovery

Active Publication Date: 2017-01-25
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] 1. Most of the current activation methods require dense dehydration or adding activated carbon to remove the drug, and the process is more complicated
[0018] 2. Most of the current activation methods use sulfuric acid additives
Sulfuric acid is a strong acid, highly corrosive, and dangerous during storage, transportation and use, and the interaction between cyanide ions and acid will produce highly toxic hydrogen cyanide gas
[0019] 3. Ultrasonic treatment is a physical method, which can only partially remove GaO on the surface of cyanide slag minerals 2 Thin film, Fe(OH) 3 Thin film, it is difficult to achieve the chemical activation effect of the agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A copper-lead sulfide ore was applied with the lead-copper priority flotation process. During the lead priority flotation, sodium cyanide was added as a copper inhibitor to suppress copper and float lead. The tailings after lead selection contained 0.93% copper. The root ion concentration is 20mg / L. After the copper sulfide mineral is activated by adding anhydrous sodium sulfite 1000g / t dry ore to the slurry, the copper sulfide concentrate with a copper grade of 18.48% and a copper recovery rate of 78.46% can be obtained by flotation.

Embodiment 2

[0053]A certain lead-zinc sulfide ore was applied with lead-zinc priority flotation process. During lead priority flotation, sodium cyanide was added as zinc inhibitor to suppress zinc and float lead. After lead selection, the tailings contained 4.3% zinc, and the cyanide in the pulp The root ion concentration is 25mg / L. By feeding oxygen-containing gas into the pulp to keep the oxygen concentration in the pulp at 15 mg / L and stirring for 15 minutes to activate the zinc sulfide mineral, the conventional flotation process in the prior art is used to obtain a zinc grade of 48.13%, and a zinc recovery rate of 90.69% % zinc sulfide concentrate.

Embodiment 3

[0055] The cyanide tailings of a gold concentrate after leaching contain 2.0% copper, and the cyanide ion concentration in the pulp is 120mg / L. After the copper sulfide mineral is activated by directly adding anhydrous sodium sulfite 10000g / t dry ore to the pulp, A copper sulfide concentrate with a copper grade of 21.43% and a copper recovery rate of 76.14% was obtained by conventional flotation process.

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PUM

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Abstract

The invention relates to a method for activating and floating sulfide minerals suppressed by cyanide ions during separation of non-ferrous multi-metal sulfide ores and comprehensive recovery of valuable elements in gold ore cyanide tailings. The method comprises the following steps of: (1) adding a soluble salt into ore slurry, and / or filling O2-containing gas and / or SO2-containing gas into the ore slurry to activate suppressed target minerals; and (2) floating to obtain target sulfide mineral concentrate, wherein the soluble salt in the step (1) is one or a mixture of more than two of inorganic sulfite, pyrosulfite or thiosulfate. According to the method disclosed by the invention, procedures for densely dehydrating and removing reagents with active carbon are eliminated, agents such as sulfuric acid and the like are not added into the ore slurry, activation and floatation of sulfide minerals are realized, a high-quality sulfide mineral concentrate product is obtained, and the recovery rate of the sulfide mineral concentrate product is increased greatly.

Description

technical field [0001] The invention discloses a flotation method, more specifically, the invention discloses an activated flotation method for sulfide minerals suppressed by cyanide ions. Background technique [0002] With the rapid growth of the national economy, various domestic industries have achieved considerable development, such as the printed circuit board industry and the white goods industry, which have rapidly developed into important pillar industries in China. With the development of these industries, the demand for various metal raw materials, especially non-ferrous metal raw materials, is increasing year by year. Therefore, various ores are rapidly mined, and even ores that were considered to have no economic value in the industry before have been put on the agenda for development and utilization. [0003] Among all kinds of ores, non-ferrous polymetallic sulfide ores account for a large proportion. There are many kinds of minerals in non-ferrous polymetalli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/00
Inventor 贺政罗科华赵志强
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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