利用湖泊底泥和粉煤灰制备瓷质砖的实验研究

梁启斌; 周俊; 王焰新

利用湖泊底泥和粉煤灰制备瓷质砖的实验研究

中国地质大学环境学院, 湖北武汉 430074

基金项目:

国家“8 63”计划课题 2002AA1039

武汉市重点科技攻关计划 20031003025

详细信息

中图分类号: X703.1
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出版历程
- 收稿日期: 2003-11-03
- 刊出日期: 2004-05-25

Experimental Studies on Porcelain Brick Preparation Using Lake Bottom Sediments and Coal Fly Ash

School ofEnvironmental Studies, China University ofGeosciences, Wuhan 430074, China

摘要

摘要: 将湖泊底泥引入瓷质砖的生产, 既可消除污染, 又能减少传统的瓷质砖生产中所需的粘土.以武汉市东湖底泥和湖北黄石电厂粉煤灰为主要原料, 辅以伟晶花岗岩、石英为添加剂, 设计4个底泥含量分别为4 0 %、5 0 %、6 0 %和70 %的配方, 每一配方压制6片生坯, 分别在1 190, 1 175, 1 160, 1 130, 1 115和1 100℃下烧成.XRD分析显示瓷坯中的莫来石晶相随烧成温度的升高而增加.在1 160~1 175℃烧成的瓷坯的吸水率和断裂模数测试结果分别为0.0 8%~ 0.2 0 %和39.36~ 51.0 8MPa, 表明利用湖泊底泥和粉煤灰作为主要原料可以烧制瓷质砖, 二者的总用量可达75 %~ 80 %.
- 东湖 /
- 湖泊底泥 /
- 粉煤灰 /
- 瓷质砖
Abstract: The exploitation of lake bottom sediments as raw materials of porcelain brick is believed to be profitable, eliminating the water pollution and reducing the consumption of clays employed in tranditional brick industry. Porcelain bricks were prepared using the bottom sediments from the East Lake in Wuhan and coal fly ash from Huangshi in Hubei as main raw materials, and granitic pegmatite and quartz as additives. Four mix-designs with 40%, 50%, 60% and 70% of the bottom sediments were tested under different sintering temperatures ranging from 1 100 to 1 190 ℃. XRD analysis indicates that the content of mullite in the porcelain bricks increases with the sintering temperature. The water absorption, rupture modulus of all porcelain bricks of the samples sintered at (1 160) and (1 175 ℃) are respectively 0.08%-0.20% and 39.36-(51.08 MPa). The results show the practicability to produce porcelain bricks using lake sediment and coal fly ash with a sum of 75%-80%.
- East Lake /
- substrate sediment /
- coal fly ash /
- porcelain brick

HTML全文

图 1 东湖底泥的差热、热重曲线

Fig. 1. DTA and TG curve of the East Lake sediments

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图 2 配方P-3的差热、热重曲线

Fig. 2. DTA and TG curve of P-3 mix-design

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图 3 配方P-1、P-2和P-3烧成瓷坯的吸水率随温度变化曲线

Fig. 3. Water absorption curves of porcelain bricks of P-1, P-2 and P-3 mix-designs relating to temperature

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图 4 配方P-1、P-2和P-3烧成瓷坯的断裂模数随温度变化曲线

Fig. 4. Rupture modulus curves of porcelain bricks of P-1, P-2 and P-3 mix-designs relating to temperature

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图 5 配方P-3在1 175, 1 160, 1 130和1 115℃烧成的瓷坯X-射线衍射图谱(XRD)

Fig. 5. XRD pattern of porcelain bricks of P-3 mix-design sintered at 1 175, 1 160, 1 130 and 1 115℃

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图 6 配方P-1、P-2和P-3的烧结温度范围

Fig. 6. Sintering temperature range of P-1, P-2 and P-3 mix-designs

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表 1 原料的化学成分

Table 1. Chemical compositions of raw materials

表 2 底泥和粉煤灰的掺加量及各配方的理论化学组成

Table 2. Content of lake sediment and coal fly ash, and theoretical chemical compositions of mix-designs

表 3 配方P-1、P-2和P-3瓷坯的吸水率和断裂模数

Table 3. Water absorption and rupture modulus of porcelain bricks of P-1, P-2 and P-3 mix-designs

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