摘要
对CO_2法硬化的水玻璃砂再生砂而言,造成再生砂制备的型砂性能恶化的主要原因是残留碳酸钠盐类的晶体及其碎片.JZ添加剂的作用在于缓解残留钠盐对硬化作用的有害影响.
For the CO2 hardened regenerated water glass sand, the main cause of performance deterioration of moulding sand prepared from regenerated sand is owing to the crystal and chips of the residual sodium cabon-ate. Function of the JZ additives is to slow the harmful effect of residual sodium carbonate to the hardening ac-
