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Preparation method for copper slag-based porous geopolymer spheres and application of copper slag-based porous geopolymer spheres

A technology of geopolymers and copper slag, applied in applications, silicon compounds, and other household appliances, can solve problems such as difficult recycling and removal of heavy metal ions, and achieve the effect of easier recycling, high efficiency, and good application prospects

Active Publication Date: 2020-11-24
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most studies on geopolymer adsorbents have focused on powders rather than spherical particles. These geopolymer powders cannot be directly used in packed beds and are difficult to recycle for the removal of heavy metal ions in wastewater.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Dry the copper slag in an electric constant temperature drying oven with a temperature of 80°C for 24 hours, grind it for 3 hours and pass it through an 80-mesh sieve to obtain copper slag powder; dissolve 0.207g of sodium hydroxide in 1.869g of sodium silicate solution to form an alkaline Activator, add 10g of copper slag powder to the alkaline activator and stir evenly;

[0023] (2) Mix 0.2g sodium lauryl sulfate, 0.3g hydrogen peroxide, and 0.523g water to prepare a foaming agent solution, slowly add the liquid to the mixture in step (1) and continue to stir, mix well, and the stirring speed is 600 rpm min, stirring for 20min to make the system form a uniform slurry;

[0024] (3) Under heating in a water bath, drop the homogeneous slurry from step (2) into a polyethylene glycol (molecular weight: 600) medium at 40°C. Alcohol to make geopolymer balls;

[0025] (4) Take out the geopolymer sphere in step (3), wash it with distilled water to remove excess lye in th...

Embodiment 2

[0028] (1) Dry the copper slag in an electric constant temperature drying oven at a temperature of 75°C for 24 hours, grind it for 3 hours and pass it through an 80-mesh sieve to obtain copper slag powder; dissolve sodium hydroxide in sodium silicate solution to form an alkaline activator, and Add 10g of copper slag powder to the alkaline activator and stir evenly, wherein the mass ratio of sodium hydroxide to sodium silicate is 0.09:1, and the mass ratio of copper slag powder: sodium hydroxide to the total mass of sodium silicate is 1:0.08;

[0029] (2) Mix sodium lauryl sulfate, hydrogen peroxide, and water to prepare a foaming agent solution, slowly add the liquid to the mixture in step (1) and continue stirring until evenly mixed at a stirring speed of 600 rpm for 20 minutes to make The system forms a uniform slurry, wherein sodium lauryl sulfate and hydrogen peroxide are mixed in a mass ratio of 1:1; the mass ratio of copper slag powder to sodium lauryl sulfate is 1: 0.03;...

Embodiment 3

[0034] (1) Dry the copper slag in an electric constant temperature drying oven with a temperature of 80°C for 24 hours, grind it for 3 hours and pass it through an 80-mesh sieve to obtain copper slag powder; dissolve sodium hydroxide in sodium silicate solution to form an alkaline activator, and Add 10g of copper slag powder in the alkaline activator and stir evenly, wherein the mass ratio of sodium hydroxide to sodium silicate is 0.2:1, and the mass ratio of copper slag powder: sodium hydroxide to the total mass of sodium silicate is 1:0.3;

[0035] (2) Mix sodium lauryl sulfate, hydrogen peroxide, and water to prepare a foaming agent solution, slowly add the liquid to the mixture in step (1) and continue stirring until evenly mixed at a stirring speed of 600 rpm for 20 minutes to make The system forms a uniform slurry, wherein sodium lauryl sulfate and hydrogen peroxide are mixed in a ratio of 1:3 by mass; the mass ratio of copper slag powder to sodium lauryl sulfate is 1: 0....

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Abstract

The invention discloses a preparation method for copper slag-based porous geopolymer spheres. According to the method, sodium hydroxide is dissolved in a sodium silicate solution, then copper slag powder is added and is stirred uniformly; a foaming agent aqueous solution is added into the mixture and is stirred uniformly to obtain geopolymer slurry; under the condition of heating in a water bath,the uniformly stirred slurry is dropwise added into polyethylene glycol with a syringe, and liquid drops are quickly solidified into small spheres at 40-70 DEG C and are dispersed and float in the polyethylene glycol to prepare geopolymer spheres; the geopolymer spheres are fished out, are washed with distilled water, are dried, and are cured and solidified at room temperature to obtain the copperslag-based porous geopolymer spheres. The sphere formation rate of the method of the invention is greater than 80%; the method realizes low-temperature solidification and waste recycling; the copperslag-based porous geopolymer spheres are applied to adsorption of heavy metal ions in wastewater, so that the adsorption rate is high; an adsorbent is easy to recycle; secondary pollution of a water body cannot be caused, and the preparation method is more friendly to the environment.

Description

technical field [0001] The invention relates to the field of adsorbent carrier technology and solid waste secondary utilization, in particular to a preparation method and application of a copper slag-based porous geopolymer sphere. Background technique [0002] As my country's copper output increases year by year, more and more copper slag is accumulated, and the task of resource utilization of copper slag becomes more difficult. According to the statistics of China's National Bureau of Statistics, China's copper output in 2012 was 6.06 million tons, and based on the calculation of 2.2 tons of copper slag for every ton of refined copper produced, the amount of copper slag in my country reached more than 1,000 tons in 2012 alone. So far, there is no economical and efficient comprehensive utilization technology of copper slag, and the copper slag is basically stored in piles, causing serious environmental pollution and waste of resources. The main mineral components of copper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B38/02C02F1/28B01J20/16C04B111/40
CPCC04B28/006C02F1/288B01J20/16C04B2111/40C04B18/144C04B22/062C04B22/00C04B24/16C04B22/068C04B38/02Y02P40/10
Inventor 罗中秋韦宇周新涛刘钦雒云龙马越母维宏
Owner KUNMING UNIV OF SCI & TECH
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