CO_2气冲紧实硬化水玻璃砂的实验研究  

Experiment and Study on the Sodium Silicate Bonded Sand Compacted and Hardened by CO_2.

作　　者：张宝生[1] 陈洪升[1] 

机构地区：[1]哈尔滨工业大学

出　　处：《中国铸机》1992年第2期6-9,共4页

摘　　要：介绍的硬化法以压缩空气为动力对水玻璃砂预紧实,随后在砂型上方吹入适量的 CO_2气体,立刻进行二次气冲硬化紧实。以压缩空气为载体,强制 CO_2迅速均匀地分布于水玻璃砂中,减少了水玻璃及 CO_2用量。研究结果表明:使用该硬化法,使砂型常温抗压强度提高,水玻璃和 CO_2气体用量减少,改善了水玻璃砂的溃散性。The hardening process introduced uses the com- pressed air as power to pre-compact the sodium silicate bonded sand.Subsequently, then proper amount of CO_2 gas is blowed in at the upper side of the mould and then a secondary air impact hardening compact is carried out immediately.Using compressed air as carrier,the CO_2 gas is forced into the sodium silicate bonded sand evenly and quickly,and it achieves in reducing the consumption of sodium silicate and CO_2.Test results show that this hardening process results in higher compression strength of sand mould at room temperature,less consumption in sodium silicate and CO_2 gas,and baiter collapsibility in sodium silicate bonded sand.

关 键 词：水玻璃砂 气冲紧实 

分 类 号：TG221[金属学及工艺—铸造]