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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 sulfurized slag and fine particles, which is applied in the field of environmental engineering, can solve the problems of unsatisfactory flotation recovery rate, etc., achieve good hydrophobicity and floatability, good crystal form, and improve hydrophobicity

Active Publication Date: 2014-02-05
CENT SOUTH UNIV
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  • Summary
  • 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 control and flotation of pure compound zinc sulfide prepared by chemical precipitation method

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

[0029] Step 2: Take 50g of zinc sulfide after hydrothermal control and flotation recovery on a 0.5L-XFG hanging tank flotation machine. Set the flotation temperature to 60°C, the stirring speed to 2070r / min, and stir for 5 minutes; add the collector, Stir for 2 min; add foaming agent a...

Embodiment 2

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

[0035] Step 1: Simulate the zinc sulfide-containing sludge (the main impurity is calcium sulfate) produced by using sodium sulfide as a neutralizer in the treatment process of a certain smelting wastewater, and take Na 2 30g of zinc sulfide, 70g of calcium sulfate, 2.5g of natural galena prepared by S precipitation method through 150μm aperture sieve, adding mineralizer KOH to make the pH of the reaction system 9 and placing it in the GCF-0.5L strong magnetic rotary stirring reactor At the same time, add water to make the filling degree of the kettle 70%, set the rotation speed to 200r / min, set the temperature to 260°C, and react for 4 hours. After the reaction is finished, cool naturally, take out the materials, and filter with suction. The solid is the simulated zinc sulfide slag after adjustment.

[0036] Step 2: Take 50g of simulated zinc sulfide slag after hydro...

Embodiment 3

[0041] Hydrothermal control and flotation of slag containing zinc sulfide

[0042] Step 1: Take 100g of zinc sulfide residue (produced in a smelting wastewater treatment process using sodium sulfide as a neutralizer to produce zinc sulfide sludge), 2.5g of natural galena, and add mineralizer KOH. , Set the pH system to 9, place in a GCF-0.5L strong magnetic rotary stirring reactor, add water to make the filling degree of the kettle 70%, set the speed to 200r / min, set the temperature to 260°C, and react for 4 hours. After the reaction is over, cool naturally, take out the materials, and filter by suction. The solid is the adjusted zinc sulfide slag.

[0043] Step 2: Take 50g of zinc sulfide slag after hydrothermal control and flotation recovery on a 0.5L-XFG hanging tank flotation machine. Set the flotation temperature to 60°C, the stirring speed to 2070r / min, and stir for 5 minutes; add dispersant and Inhibitor, stir for 3min; add activator during zinc flotation and stir for 3min;...

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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 the flotation behavior of the hard-to-select fine-grained sulfide slag. Background technique [0002] Heavy metal slag is one of the main forms of heavy metal pollution to the environment. The traditional chemical sodium sulfide precipitation method will produce a large amount of waste slag in the process of treating heavy metal wastewater, and most of the heavy metals exist in the form of amorphous sulfide. The discharge and storage of a large amount of heavy metal waste slag not only takes up a lot of land, but also often contains metals such as lead, zinc and copper, which pose a great pollution and threat to the environment. On the other hand, my country is currently in short supply of mineral resources and the situation is grim. Lead, zinc, copper and other minerals are heavily dependent on imports. Heavy metal waste s...

Claims

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Application Information

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Patent Type & Authority Patents(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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