Investigation on Preparation of Glass-ceramics with Iron Tailings
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摘要:
采用烧结法以商洛某尾矿库现存铁尾矿为主要原料制备微晶玻璃。对基础玻璃熔制较佳工艺进行了优化，并探究晶化温度和保温时间对微晶玻璃的抗压强度、密度以及热膨胀系数的影响。结果表明：在熔制温度1400℃，保温2 h条件下熔制的基础玻璃性能较优；在晶化温度900℃，保温2 h条件下晶化处理得到的微晶玻璃试样性能较优，其抗压强度达到158.32 MPa，密度为2.74 g/cm3，热膨胀系数为6.8×10-6 K-1。
Abstract:The glass-ceramics were prepared by sintering method from an iron tailings in Shangluo area. The optimum process parameters of melting base glass were optimized. The effects of the crystallization temperature on the compressive strength, density and thermal expansivity of glass-ceramics were investigated. The results show that optimal performance of the base glass melted can be obtained at the melting temperature of 1400℃ and melting time of 2 h. Moreover the best properties of the glass-ceramics such as compressive strength of 158.32 MPa, density of 2.74 g/cm3, thermal expansivity of 6.8×10-6K-1 could be obtained at the crystallization temperature of 900℃ and holding time of 2 h.
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Key words:
- Iron tailings /
- Glass-ceramics /
- Compressive strength /
- Coefficient of thermal expansion
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表 1 铁尾矿的化学成分/%
Table 1. Chemical composition of iron tailings
SiO2 Al2O3 CaO MgO Fe2O3 FeO K2O Na2O 其他 66.00 7.06 1.86 0.25 3.18 4.15 2.59 0.86 14.05 
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表 2 不同熔制温度下得到的基础玻璃特性
Table 2. Characteristics of the base glass at different melting temperatures
熔制温度 1200℃ 1300℃ 1400℃ 特性 粘稠，
有气泡流动，
少量气泡易流动，
无气泡
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表 3 不同熔制时间下得到的基础玻璃效果
Table 3. Characteristics of the base glass at different melting time
熔制时间 1 h 2 h 3 h 特性 粘稠，
有气泡均匀，
流动性好均匀，
流动性差
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