我厂使用水玻璃砂已经半年多了,虽然发生过一些问题,但都初步获得了解决,今将经过情形简述如下:我们仅将水玻璃砂用于铸钢,做好的砂型用本厂石灰炉废气(以下简称废气,内含CO_2(35)~38%,温度同室温,压力约3公斤/公分~2)吹一遍,不再经任何烘干步骤即行浇铸.开始时没有掺用旧砂,第一次型砂配合如下:(按加入次序)1/16″石英砂30公斤; I use sodium silicate sand plant has more than six months, although some problems have occurred, but have initially been resolved, the situation will be outlined as follows: We only use sodium silicate sand for steel, good sand with the factory Lime gas furnace emissions (hereinafter referred to as exhaust gas, containing CO_2 (35) ~ 38%, the temperature with room temperature, the pressure of about 3 kg / cm ~ 2) blown again, no longer any drying step that is cast. Sand, the first sand with the following: (by adding order) 1/16 "quartz sand 30 kg;