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水玻璃砂负压吹CO2硬化工艺研究
Study on CO2 Hardening Process of Sodium Silicate Sand by Negative Pressure Blowing
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- DOI:
- 作者:
- 刘伟 许荣福 孙清洲 杨明华
LIU Wei;XU Rongfu;SUN Qingzhou;YANG Minghua
- 作者单位:
- 凯得力耐火材料（中国）有限公司 山东建筑大学材料科学与工程学院
Calderys China Co.,Ltd.,Suzhou 215600,China;School of Materials Science and Engineering,Shandong Jianzhu University,Ji'nan 250101,China
- 关键词:
- 水玻璃砂 CO2硬化 硬化强度 负压硬化工艺
sodium silicate sand CO2 hardening process hardening strength negative pressure hardening process
- 摘要:
- 以水玻璃砂为研究对象,研究不同工艺条件下负压吹CO2硬化水玻璃砂工艺性能,分别在不同的吹气压力、吹气时间、水玻璃加入量,不同的试样厚度条件下,系统研究水玻璃砂采用传统的吹气方式与负压吹气方式的硬透性、硬化均匀性、抗拉强度及表面强度等影响规律。实验结果表明:在负压条件下,CO2气体吹气时间为30s,吹气压力为0.20MPa,水玻璃加入量为6%时,水玻璃砂的表面强度最高,其最大表面硬度为(89),硬透性最好,硬化均匀;其工艺试样的抗拉强度最高(2.73MPa),硬化效果最好。Taking sodium silicate sand as the research object,the technological properties of CO2 hardening sodium silicate sand under different technological conditions were studied.The influence laws of hard permeability,hardening uniformity,tensile strength and surface strength of sodium silicate sand using traditional and negative air blowing methods were studied under different conditions of blowing pressure,blowing time,adding amount of sodium silicate and different sample thickness.The results show that under the negative pressure condition,when the blowing time of CO2 gas is 30 s,the blowing pressure is 0.20 MPa,and the amount of sodium silicate is 6%,the surface strength of sodium silicate sand is the highest,and its maximum surface hardness is(89),with the best hard permeability and uniform hardening.The highest tensile strength of process sample is 2.73 MPa and the best hardening effect.