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一、前言水玻璃——石英质砂型的硬化途径很多。从使用便捷和能源考虑,目前国内绝大多数厂家大都采用一次性吹CO_2气体硬化。由于此硬化方法的本身系多相体系的化学反应,且往往需要担负数十吨甚至成百吨砂型(芯)硬化的日负荷量。特别是从寒冷季节的生产周期和砂型质量的要求看,吹气硬化法的反应速度及其硬化强度就很不适应了。本文以“促硬”为题,叙说了本厂为解决这一矛盾所采取的颇有成效的措施,并从理论上阐明了所用促硬剂的强化作用。
First, the foreword Water glass - quartz sand hardening a lot of ways. From the use of convenient and energy considerations, at present most of the domestic manufacturers use one-time blow CO 2 gas hardening. Because of this hardening method itself is a heterogeneous chemical reaction system, and often need to take tens or even hundreds of tons of sand (core) hardened daily load. Especially from the cold season of the production cycle and sand quality requirements, the blow-hardening method of the reaction rate and its hardening strength would not fit. In this paper, “promoting hard” as the title, narrated the factory to solve this contradiction has taken quite fruitful measures, and theoretically illustrates the strengthening effect of the hardeners used.