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Method for recycling zinc oxide from zinc sulfide flotation tailings

A technology for flotation tailings and zinc sulfide, applied in flotation, solid separation, etc., can solve the problems of increasing the difficulty of flotation recovery of tailings zinc oxide and the decrease of the floatability of zinc oxide minerals

Active Publication Date: 2016-02-24
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the addition of a large amount of lime, it is difficult to recover tailings zinc oxide flotation. On the one hand, it is necessary to add sulfuric acid or a large amount of ammonium bicarbonate to eliminate the influence of calcium ions. Calcium carbonate forms on the surface of zinc ore, which reduces the floatability of zinc oxide minerals

Method used

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Examples

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Effect test

Embodiment 1

[0016] A kind of method of reclaiming zinc oxide from zinc sulfide flotation tailings of the present invention comprises the following steps:

[0017] (1) Concentrate high-basicity zinc sulfide flotation tailings to 45wt%, add 800g / t-1200g / citric acid, and stir for 10-15 minutes.

[0018] (2) Add sodium sulfide 2-3kg / t, stir for 5 minutes, then add water to dilute the concentration to 30%.

[0019] (3) Add 300-500 g / t of stearyl primary amine acetate, and stir for 5 minutes;

[0020] (4) Add No. 2 oil 120-160g / t, stir and react for 3 minutes, and the pH of the pulp is 8.5-9.5 at this time. Start aerated scraping flotation to obtain high-quality zinc oxide products.

Embodiment 2

[0022] Present embodiment is an example of the method for reclaiming zinc oxide from zinc sulfide flotation tailings of the present invention, comprises the steps:

[0023] 1. Mineral raw materials:

[0024] A lead-zinc oxide mine in Pu'er, Yunnan, ore properties: zinc content is 5.6%, lead is 0.6%, sulfur content is 3.2%, which is a typical mixed oxygen-sulfur ore. The main minerals in the ore are galena, white leadite, sphalerite, smithsonite, zinc silicate, pyrite, limonite, chlorite, calcite, quartz, etc.

[0025] 2. Chemical system and operating conditions: Grind the ore to -200 mesh 85%, add water to adjust the concentration to 38%, add 6kg / t lime, 15g / t ethyl disulfide flotation lead sulfide, lead sulfide flotation tailings Add 3kg / t of lime, 300g / t of copper sulfate, activate 5 molecules, and then add 300g / t of butyl xanthate to float zinc sulfide. At this time, the pH of the tailings is 11.5, and the zinc sulfide flotation tailings are concentrated to 45%. , add cit...

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PUM

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Abstract

The invention discloses a method for recycling zinc oxide from zinc sulfide flotation tailings. The method comprises the following steps: (1) concentrating high-alkalinity zinc sulfide flotation tailings until the concentration is 45wt%; adding 800g / t to 1200g / t of citric acid; stirring and reacting for 10 to 15 minutes; (2) adding 2kg / t to 3kg / t of sodium sulfide; stirring and reacting for 5 minutes; adding clean water to dilute the solution until the concentration is 30wt%; (3) adding 300g / t to 500g / t of octadecylamine acetate, stirring and reacting for 5 minutes; (4) adding 120g / t to 160g / t of 2# oil; stirring and reacting for 3 minutes until the pH of ore pulp is 8.5 to 9.5; inflating air, blowing bubbles and performing flotation to obtain a high-quality zinc oxide product.

Description

1. Technical field [0001] The invention relates to an ore dressing agent, in particular to a method for recovering zinc oxide from zinc sulfide flotation tailings. 2. Background technology [0002] In the flotation of oxygen-sulfur mixed zinc ore, zinc sulfide is generally flotation first, and then zinc oxide is flotation after tailings flotation pyrite. Because the flotation separation of zinc sulfide adopts high-alkali process, the pyrite is suppressed by adding lime, the sphalerite is activated by copper sulfate, and the sphalerite is floated by butyl xanthate. Due to the addition of a large amount of lime, it is difficult to recover tailings zinc oxide flotation. On the one hand, it is necessary to add sulfuric acid or a large amount of ammonium bicarbonate to eliminate the influence of calcium ions. Calcium carbonate forms on the surface of zinc ore, which reduces the floatability of zinc oxide minerals. When the amount of lime used for flotation of zinc sulfide is wi...

Claims

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Application Information

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IPC IPC(8): B03D1/02B03D1/018B03D103/02
CPCB03D1/018B03D1/02B03D2203/02
Inventor 陈建华柯宝霖李玉琼赵翠华陈晔甘恒
Owner GUANGXI UNIV
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