Compositions and distribution of fly ash in low-melting zone

WU Pingping; ZHANG Zewu; CHEN Jianding

doi:10.11949/j.issn.0438-1157.20160778

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Compositions and distribution of fly ash in low-melting zone

更新时间：2025-12-10

- Compositions and distribution of fly ash in low-melting zone
- CIESC Journal Issue 5, Pages: 1767-1772(2017)
- 作者机构：
  
  1. 华东理工大学材料科学与工程学院,上海,200237
  2. 华东理工大学工程设计研究院,上海,200237
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20160778
  CLC： B321
- Online First：05 May 2017，
  
  Published：05 May 2017
- 稿件说明：
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WU Pingping, ZHANG Zewu, CHEN Jianding. Compositions and distribution of fly ash in low-melting zone[J]. CIESC Journal, 2017, (5): 1767-1772.
DOI：

WU Pingping, ZHANG Zewu, CHEN Jianding. Compositions and distribution of fly ash in low-melting zone[J]. CIESC Journal, 2017, (5): 1767-1772. DOI： 10.11949/j.issn.0438-1157.20160778.

摘要

粉煤灰的熔融温度分布图对粉煤灰成纤的降熔配比具有指导意义。利用X荧光光谱仪和灰熔点测试仪，分别测得5种不同来源粉煤灰样品的组成和熔融特性温度。运用实验所测值与117种粉煤灰组成及熔融温度的文献值，以Al2O3+SiO2、CaO+MgO、Fe2O3+TiO2为三相坐标制成三元相图，按照熔融温度高低划分不同区域，得到粉煤灰熔融温度分布图，找出低熔区（流动温度FT<1350℃）的组成及其组成与熔融温度的分布规律。同时将次要组分通过等电量换算后标在CaO-Al2O3-SiO2三元相图中，发现所研究粉煤灰在低熔区的组成与CaO-Al2O3-SiO2三元相图中1350℃低温共熔区的组成具有良好的一致性，由此找出高熔融温度粉煤灰成纤的降熔调配方法。

Abstract

The melting temperature distribution of fly ash used to prepare fiber is a key to the composition ratio for reducing the melting temperature. Using X-ray fluorescence spectrometry and ash fusion point determination meter

the compositions and fusion temperature of five kinds of fly ash samples were measured. Ternary phase diagram with Al2O3+SiO2

CaO+MgO

Fe2O3+TiO2 for three-phase coordinate was obtained based on the experimental results in the present study and the data of compositions and melting temperature of 117 fly ash samples in literature. Meanwhile

the fly ash melting temperature profile was derived from the zoning method according to different melting temperature. With the effort of distinguishing the compositions of fly ash in low-melting zone

the regularities of its compositions and melting temperature have been established. It has been proved that the compositions and distribution of fly ash in the low melting regions (FT<1350℃) are well consistent with the low melting point regions of 1350℃ in CaO-Al2O3-SiO2 ternary phase diagrams where the minor components are converted to the equal charge of main components

leading to a method of reducing the melting temperature of the fly ash with high melting temperature.

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