Knockability of CO<sub>2</sub> Modified Silicate Sand

Xu Jin

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Knockability of CO₂ Modified Silicate Sand
Issue 8, Pages: 600-603(2008)
Published： 2008 ，
DOI：

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[1]许进.CO_2改性水玻璃砂的出砂性[J].特种铸造及有色合金,2008(08):600-603+571.

Xu Jin. Knockability of CO₂ Modified Silicate Sand. [J]. Special Casting & Nonferrous Alloys (8):600-603(2008)
[1]许进.CO_2改性水玻璃砂的出砂性[J].特种铸造及有色合金,2008(08):600-603+571. DOI：

Xu Jin. Knockability of CO₂ Modified Silicate Sand. [J]. Special Casting & Nonferrous Alloys (8):600-603(2008) DOI：

摘要

研究了改性水玻璃砂的出砂性

试验制订了测量水玻璃砂试样残留强度时的加热规范和冷却方式。以水玻璃砂的残留强度值≤0.5MPa为标准来评价改性水玻璃18号的出砂性

结果发现

当粘结剂加入量为2.5%

.0%时

在400

000℃下均具有良好的出砂性。观察了普通和改性水玻璃砂在加热温度为200、600、800、1000、1200℃的残留强度断口

发现普通水玻璃和改性水玻璃A1都在800℃出现残留强度峰值

改性水玻璃18号与B2均在800℃出现残留强度谷值

并解释了其中的原因。

Abstract

The knockability of modified silicate sand was researched. Heating specification and cooling ways for measuring residual strength of silicate sand specimens were mapped. Knockability of 18# modified silicate sand was evaluated by means of residual strength value less than 0.5 MPa as a criterion. The results show that the CO2 modified silicate sand exhibits acceptable knockability with 2.5%

.0% binder addition at 400

000 ℃. Residual strengths of common and modified silicate sand are measured at 200

600

800

1 000

1 200 ℃. It is found that peak residual strength appeared at 800 ℃ in both common silicate sand and modified silicate sand A1

and valley value appeared at 800 ℃ in both 18# modified silicate sand and modified silicate sand B2. The forming mechanism was approached.