死烧又称硬烧。是耐火原料在足够高的温度下煅烧,并达到充分烧结的一种工艺过程。常用于烧制耐火材料的熟料(特别是碱性熟料)。当使用高温体积稳定性低的某些天然矿物、碱性耐火原料或其他合成材料作为耐火原料时,必须先经死烧制成耐火熟料。2001年全球耐火级死烧镁砂(DI )的总量约为640万t。其中,天然耐火级死烧镁砂的产量为560万t,占总量的84.496;合成镁砂的产量约为80万t,占总量的15.6%。
人工合成的无水硫酸钙晶须又可划分为无水可溶、无水死烧两种。
The synthetic anhydrous calcium sulfate whiskers can be further divided into two types including anhydrous soluble and anhydrous dead roasted.
在质量上熔融烧结熟料和死烧块状料优于葡萄状熟料,而还原料是所有热料中质量最差的。
The quality of molten sintering clinker and dead burned dense clinker is better than that of the grape like clinker, but the quality of clinker produced under reduced condition is the worst of all.
通过向高温死烧过的氧化钙中加入合适的添加剂,对水化过程进行控制,将膨胀能充分利用到介质破碎中。
Adding appropriate additive to the calcium Oxide sintered in the high temperature, and controlling the process of hydration will make the expansion fully exert to the fragmentation of rock.
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