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Multi-metal recovery method for low-grade oxygen-sulfide lead-zinc mixed ore

A lead-zinc ore, low-grade technology, applied in chemical instruments and methods, wet separation, solid separation, etc., can solve the problems of increased sulfuric acid consumption, high cost of flotation reagents, and difficult to control the quality of zinc oxide products. The effect of improving the recovery rate and eliminating the loss of metal running tail

Active Publication Date: 2014-09-03
李锦源
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Due to the different oxidation depths of metal single crystals of oxygen-sulfur mixed lead-zinc ores, the zinc oxide part of over-crushed mineral particles is not preferentially separated and recovered. Choose recycling, resulting in direct running tail waste
[0006] 2. Zinc sulfide and zinc oxide all adopt the flotation method, adding traditional beneficiation reagents, the surface layer of the pulp is affected by particles, resulting in unstable flotation pulp, and the quality of zinc oxide products is difficult to control
[0007] 3. The total metal recovery rate is relatively low, generally 40%-50%, and the resource utilization rate is low
[0008] 4. The flotation method is all used, the amount of chemicals used is large, and there are many chemical residues in industrial wastewater. Water resources cannot be recycled and used, and environmental protection discharge requirements cannot be met, and the cost of sewage treatment is high.
[0009] 5. The total cost of beneficiation is high, and the flotation zinc oxide product is strongly alkaline, which leads to a substantial increase in the consumption of sulfuric acid in the production process of downstream smelting enterprises, which increases the cost of smelting

Method used

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Experimental program
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Effect test

Embodiment 1

[0056] The raw ore contains 13.5% zinc, 0.9% lead, 5% iron, and an oxidation rate of 70%.

[0057] The raw ore enters the No. 1 ball mill. After ball milling, the pulp concentration in the No. 1 ball mill is 35-38, and the fineness is >75%. Then enter the spiral separator, the particle size is -300 mesh, and the part enters the crushing recovery system, and the combination of modified amines and pentaxanthate is used as a collector to obtain zinc sulfide. At this time, the yield is 10%, and the concentrate Grade 48%.

[0058] 85-90% of the output of the pulp enters the cyclone separator for classification, the pulp of -200 mesh at the upper outlet accounts for 80%, enters the flotation system, and the rest enters the closed-circuit grinding system of the No. 2 ball mill.

[0059] The pulp from the upper outlet of the cyclone separator enters the first group of flotation system with a pulp concentration of 35%. Using lime slurry, sodium sulfide vulcanization, and the combined...

experiment example 1

[0086] Experimental example 1: Industrial test average index (%)

[0087]

[0088] As can be seen from the above table, the industrial test can obtain lead concentrate containing 47.58% lead, lead recovery rate is 77.22%; zinc sulfide concentrate contains zinc 48.83%, zinc recovery rate is 37.05%; zinc oxide concentrate contains zinc 22.18%, zinc The recovery rate was 50.19%, and the solubility was 92.00%.

[0089] The industrial test results show that the beneficiation process of controlled dissociation two-stage graded grinding-enhanced fine sludge recovery-ladder flotation has obtained excellent beneficiation indicators. This process not only eliminates the influence of mud on lead and zinc recovery, but also effectively recovers Zinc oxide minerals in mud. The process is easy to control, and the beneficiation index is stable.

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Abstract

The invention relates to the technical field of recovery of low-grade oxygen-sulfide lead-zinc mixed ore, in particular to a multi-metal recovery method for the low-grade oxygen-sulfide lead-zinc mixed ore. The multi-metal recovery method comprises the following preparation steps that firstly, chute separation is carried out on the raw ore after primary grinding is carried out and the raw ore enters a spiral chute of a classification system; secondly, separation and enrichment recovery is carried out on over-crushing minerals in an over-crushing system to obtain over-crushing zinc oxide concentrate and discharge tailings, and flotation is carried out on the minerals entering a first flotation system set to discharge the tailings; thirdly, secondary flotation is carried out on the tailings after the tailings enter a second flotation system set to obtain zinc sulfide minerals and discharge secondary tailings; fourthly, tertiary flotation is carried out on the secondary tailings after the secondary tailings enter a third flotation system set to obtain pyrites and discharge tertiary tailings; fifthly, the tertiary tailings enter a physical beneficiation system to extract zinc oxide minerals. According to the multi-metal recovery method, the problem that flotation and reselection recovery of superfine zinc oxide particles is difficult, running and losing of metal due to the argillization phenomenon of the oxide minerals are eliminated, and the recovery rate of the minerals is increased.

Description

technical field [0001] The invention relates to the technical field of recovery of low-grade oxygen-sulfur mixed lead-zinc ore, in particular to a method for polymetallic recovery of low-grade oxygen-sulfur mixed lead-zinc ore. Background technique [0002] Low-grade oxygen-sulfur mixed lead-zinc ore is one of the top ten refractory ores in the world. The existing beneficiation process: [0003] After ball milling, use common flotation reagents and flotation methods to float lead metal; then use common flotation reagents to float zinc metal, and finally get beneficiation products: lead concentrate, zinc sulfide concentrate and zinc oxide concentrate. [0004] There are following disadvantages in existing beneficiation method: [0005] 1. Due to the different oxidation depths of metal single crystals of oxygen-sulfur mixed lead-zinc ores, the zinc oxide part of over-crushed mineral particles is not preferentially separated and recovered. Choose recycling, resulting in direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03D1/00B03B5/62B03B5/34
Inventor 李锦源
Owner 李锦源
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