《ms》易溃散水玻璃砂的研究

Study on“ms” Easy-collapsible Silicate-bonded Sand

研制了《ｍｓ》溃散剂及《ｍｓ》改性水玻璃。《ｍｓ》改性水玻璃砂ＣＯ２硬化抗拉强度大于０．２ＭＰａ，烘干抗拉强度大于２ＭＰａ，７２ｈ抗拉强度大于０．６ＭＰａ，６００～１１００℃的溃散功降到１～１６．３Ｊ。用于生产中、小型铸钢件，易清砂，旧砂回用率达７０％。

A'ms'collapsible agent and'ms'modified sodium silicate have been developed. The tensile strength of'ms'modified silicate-bonded sand hardened by carbon dioxide was more than 0.2 MPa, by drying oven more than 2. 0 MPa and the tensile strength after 72h reached a value of 0. 6MPa, the collapsible work at 600-1100℃ was lowered to 1￣16.3 J.The modified silicate-bonded sand can be used for small and medium-sized steel castings with easy shakeout operation,the reuse rate of used sand reached by 70%.