pH对精炼渣碳酸化效果机制研究

伊元荣; 张京辉; 艾尼瓦尔·斯地克; 白书齐; 史星丽

doi:10.13568/j.cnki.651094.651316.2021.09.15.0004

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pH对精炼渣碳酸化效果机制研究

更新时间：2026-01-21

- pH对精炼渣碳酸化效果机制研究
- Journal of Xinjiang University (Natural Science Edition in Chinese and English) Vol. 39, Issue 5, Pages: 608-614(2022)
- 作者机构：
  
  1. 新疆大学生态与环境学院
  2. 新疆大学绿洲教育部重点实验室
  3. 新疆大学地理与遥感科学学院
- 作者简介：
- 基金信息：
- DOI：10.13568/j.cnki.651094.651316.2021.09.15.0004
  CLC： X757
- Published：2022
- 稿件说明：
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[1]伊元荣,张京辉,艾尼瓦尔·斯地克,等.pH对精炼渣碳酸化效果机制研究[J].新疆大学学报(自然科学版)(中英文),2022,39(05):608-614+624.
[1]伊元荣,张京辉,艾尼瓦尔·斯地克,等.pH对精炼渣碳酸化效果机制研究[J].新疆大学学报(自然科学版)(中英文),2022,39(05):608-614+624. DOI： 10.13568/j.cnki.651094.651316.2021.09.15.0004.

DOI：10.13568/j.cnki.651094.651316.2021.09.15.0004.

摘要

以新疆某钢厂精炼渣为实验原料，通过粒径、液固比、CO2通气量、搅拌速度等不同工艺条件探究pH对精炼渣碳酸化效果的影响，分析碳酸化过程pH值和电导率的变化规律．通过XRD(X-Ray Difractometer)、SEM(Scanning Electron Microscope)、TG-DTG(Thermo Gravimetry-Derivative Thermo Gravimetry)、FT-IR(Fourier TransformInfrared Spectroscopy)、ICP离子色谱等表征方法研究在不同pH缓冲溶液下精炼渣碳酸化后矿相成分变化、pH对溶液中离子(Ca2+、CO32-、HCO3~-)的迁移转化，并对碳酸化程度、CaCO3的质量和CO2吸收量做定量分析．结果表明：pH在弱酸和强碱的条件下会促进Ca2+的更高溶解，使C-S-H凝胶在碳酸化的作用下发生脱钙，最终生成CaCO3

pH=6.00时，总失重率达到最大为30.10%;pH=12.46时，碳酸化程度达到最高为40.48%．碳酸化后的精炼渣可用作建筑材料，达到“以废治废”的目的．

Abstract

The efect of pH on the carbonation of the slag from a steel plant in Xinjiang was studied

the effects of diferent process conditions

such as particle size

liquid-solid ratio

CO2 ventilation and stirring speed

on the carbonation efect of refining slag were studied. The variation law of pH value and conductivity during carbonation was analyzed. Through XRD(X-Ray Difractometer)

SEM(Scanning Electron Microscope)

TGDTG(Thermo Gravimetry-Derivative Thermo Gravimetry)

FT-IR(Fourier Transform-Infrared Spectroscopy)

ICP ion chromatography and other characterization methods were used to study the changes of mineral phase composition of refining slag after carbonation in diferent pH bufer solutions

pH of the ions in the solution. And the degree of carbonation

the mass of CaCO3 and the amount of CO2 absorption were quantitatively analyzed. The results show that pH can promote the higher dissolution of Ca2+under the condition of weak acid and strong base

which leads to the decalcification of C-S-H gel to CaCO3 under the action of carbonation. When pH=6.00

the maximum weight loss rate is 30.10%; when p H=12.46

the maximum carbonation degree is 40.48%. The carbonated refining slag can be used as building materials to achieve the purpose of “using waste to treat waste”.

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