水玻璃有机酯自硬砂是一种以水玻璃为粘结剂,以有机酯为硬化剂的新的造型、制芯混合料。近年来,它在国外的应用迅速增长。这种自硬砂性能好,成本低,原材料问题容易解决,比较适合我国目前情况。因此,我们对它进行了系统的试验和研究,认为这种自硬砂的主要优点有:(1)作为硬化剂的有机酯是从石油化工厂的废液中提取的,做到“化废为宝”,而且水玻璃加入量比一般水玻璃砂减少一半,故计入有机酯费用后,型砂成本仅相当于一般水玻璃砂,还可节省吹CO_2的工序和费用。与双快水泥自硬砂相比,成本也较低。(2)粘结剂和硬化剂都是液体,无毒,无粉尘, Water glass organic ester self-hardening sand is a water glass as a binder, organic ester as a hardener of the new shape, core mixture. In recent years, its rapid growth in foreign applications. This hard sand performance, low cost, easy to solve the problem of raw materials, more suitable for our current situation. Therefore, we conducted a systematic experiment and research on it. The main advantages of this kind of self-hardening sand are as follows: (1) The organic ester as the hardener is extracted from the waste liquid of the petrochemical plant, Treasure ", and the amount of sodium silicate reduced by half compared with the general sodium silicate sand, it is included in the cost of organic esters, the sand cost is only equivalent to the general sodium silicate sand, but also save CO 2 blowing process and costs. Compared with Shuangkeng cement self-hardening sand, the cost is lower. (2) binders and hardeners are liquid, non-toxic, dust-free,