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Method for performing hydrothemal regulation and control on refractory and fine-grained vulcanization slag to optimize flotation behavior thereof

A technology of sulfide slag and fine particles, applied in the field of environmental engineering, can solve the problems of unsatisfactory flotation recovery rate, etc., and achieve the effects of good hydrophobicity and floatability, large grain size and good crystal shape.

Active Publication Date: 2012-08-22
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the traditional Na 2 The artificial sulfide ore produced by S sulfidation is produced by chemical precipitation, and its shape, particle size and surface properties are very different from natural ores, and most of them exist in an amorphous state, so the flotation recovery rate obtained is not ideal.

Method used

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  • Method for performing hydrothemal regulation and control on refractory and fine-grained vulcanization slag to optimize flotation behavior thereof
  • Method for performing hydrothemal regulation and control on refractory and fine-grained vulcanization slag to optimize flotation behavior thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Hydrothermal regulation and flotation of pure compound zinc sulfide prepared by chemical precipitation

[0028] Step 1: Take 30g of the pure compound zinc sulfide prepared by the chemical precipitation method, pass through a 150μm aperture sieve, add 2.5g of natural galena, add mineralizer KOH, make the reaction system pH 9, place it in GCF-0.5L strong magnetic rotary stirring Reactor, add water at the same time to make the filling degree in the kettle to 70%, set the rotation speed at 200r / min, set the temperature at 260°C, and react for 4 hours. After the reaction is finished, cool naturally, take out the material, filter with suction, and the solid is zinc sulfide after regulation.

[0029] Step 2, take 50g of zinc sulfide after hydrothermal regulation and carry out flotation recovery on a 0.5L-XFG hanging tank type flotation machine, set the flotation temperature to 60°C, stir at a stirring speed of 2070r / min, and stir for 5min; add collector, Stir for 2 minutes; a...

Embodiment 2

[0034] Hydrothermal control and flotation of simulated zinc sulfide slag prepared by chemical precipitation

[0035] Step 1, simulating the zinc sulfide-containing sludge (the main impurity is calcium sulfate) produced by using sodium sulfide as a neutralizing agent in a smelting wastewater treatment process, taking Na 2 30g of zinc sulfide, 70g of calcium sulfate, 2.5g of natural galena prepared by the S precipitation method through a 150μm aperture sieve, adding mineralizer KOH to make the pH of the reaction system 9, placed in a GCF-0.5L strong magnetic rotary stirring reactor , while adding water to make the filling degree in the kettle 70%, set the rotating speed at 200r / min, set the temperature at 260°C, and react for 4 hours. After the reaction, cool naturally, take out the material, and filter with suction, and the solid is the regulated simulated zinc sulfide slag.

[0036] Step 2: Take 50g of simulated zinc sulfide slag after hydrothermal regulation and carry out fl...

Embodiment 3

[0041] Hydrothermal Control and Flotation of Slag Containing Zinc Sulfide

[0042] Step 1, take 100g of zinc sulfide slag passed through a 150 μm aperture sieve (produced in a smelting wastewater treatment process using sodium sulfide as a neutralizing agent to produce zinc sulfide-containing sludge), 2.5g of natural galena, and add mineralizer KOH , so that the pH system is 9, put it in a GCF-0.5L strong magnetic rotary stirring reactor, add water at the same time to make the filling degree of the kettle 70%, set the speed at 200r / min, set the temperature at 260°C, and react for 4 hours. After the reaction, cool naturally, take out the material, and filter with suction, and the solid is regulated zinc sulfide slag.

[0043] Step 2, take 50g of zinc sulfide slag after hydrothermal regulation and carry out flotation recovery on a 0.5L-XFG hanging tank type flotation machine, set the flotation temperature to 60°C, stir at a speed of 2070r / min, and stir for 5min; add dispersant a...

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Abstract

The invention discloses a method for performing hydrothemal regulation and control on refractory and fine-grained vulcanization slag to optimize flotation behavior of the difficultly-selected and fine-grained vulcanization slag. The method comprises the following steps: putting the refractory and fine-grained vulcanization slag with poor crystallization effect into a hydrothemal reaction kettle; adding a certain amount of water; and realizing crystal form control over artificial sulfide under a high-temperature and high-pressure condition to improve floatability of metal sulfide. A hydrothemal regulation and control technology is as follows: a mineralizing agent and a crystal form modulating agent are added, so that the hydrothemal reaction temperature is improved, multiple regulation and control means, such as crystallization reaction time, are controlled, so that high-efficiency crystallization and growth of the metal zinc sulfide are realized. By adopting the crystal form regulation and control technology, a floating recovery rate of zinc in the refractory and fine-grained vulcanization slag is improved from the original 32.64% to 72.78%. The method is used for recycling valued metals in tailings as well as effectively removing heavy metals in waste slags.

Description

technical field [0001] The invention belongs to the field of environmental engineering and relates to a method for hydrothermal control and optimization of refractory fine-grained sulfide slag to optimize its flotation behavior. Background technique [0002] Heavy metal waste residue is one of the main forms of heavy metal pollution in the environment. The traditional chemical sodium sulfide precipitation method will produce a large amount of waste residue in the process of treating heavy metal wastewater, in which heavy metals mostly exist in the form of amorphous sulfide. The discharge and stockpiling of a large amount of heavy metal waste slag not only occupies a large amount of land, but also often contains metals such as lead, zinc and copper, which poses a great pollution and threat to the environment. On the other hand, my country's current shortage of mineral resources, the situation is grim, lead, zinc, copper and other minerals rely heavily on imports. Heavy meta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/08
Inventor 闵小波柴立元张海静梁彦杰袁翠玉柯勇李青竹
Owner CENT SOUTH UNIV
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