Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for digesting free calcium oxide in steelmaking dedusting ash
The invention relates to the technical field of solid waste treatment, in particular to a method for digesting free calcium oxide in steelmaking dedusting ash. The digestion method mainly comprises the following steps of: putting steelmaking dedusting ash into a digestion container, replacing gas in the digestion container with carbon dioxide, then injecting saturated steam, performing digesting under specific pressure and temperature conditions, replacing gas in the digestion container with precooled carbon dioxide, and performing cooling. According to the digestion method, too high reactiontemperature and pressure are not needed, the needed reaction time is shorter, the digestion efficiency is high, and large-scale digestion of the steelmaking dedusting ash in production is facilitated.The steelmaking dedusting ash obtained after digestion is uniform in particle size distribution, the elemental iron cannot be excessively oxidized in the digestion process, and resource utilization of the steelmaking dedusting ash and recovery of the elemental iron in the steelmaking dedusting ash are facilitated.
本发明涉及固废处理技术领域，尤其涉及一种炼钢除尘灰中游离氧化钙的消解方法。该消解方法主要包括以下步骤：将炼钢除尘灰置于消解容器中，用二氧化碳置换消解容器中的气体，然后注入饱和水蒸气，在特定压力和温度条件下消解，再用预冷的二氧化碳置换消解容器内的气体并降温。该消解方法不需要过高的反应温度和压力，且所需反应时间更短，消解效率高，有利于在生产中实现对炼钢除尘灰的规模化消解。消解后所得炼钢除尘灰粒度分布均匀，且单质铁不会在消解过程中被过多氧化，便于炼钢除尘灰的资源化利用和其中单质铁的回收。
Method for digesting free calcium oxide in steelmaking dedusting ash
The invention relates to the technical field of solid waste treatment, in particular to a method for digesting free calcium oxide in steelmaking dedusting ash. The digestion method mainly comprises the following steps of: putting steelmaking dedusting ash into a digestion container, replacing gas in the digestion container with carbon dioxide, then injecting saturated steam, performing digesting under specific pressure and temperature conditions, replacing gas in the digestion container with precooled carbon dioxide, and performing cooling. According to the digestion method, too high reactiontemperature and pressure are not needed, the needed reaction time is shorter, the digestion efficiency is high, and large-scale digestion of the steelmaking dedusting ash in production is facilitated.The steelmaking dedusting ash obtained after digestion is uniform in particle size distribution, the elemental iron cannot be excessively oxidized in the digestion process, and resource utilization of the steelmaking dedusting ash and recovery of the elemental iron in the steelmaking dedusting ash are facilitated.
本发明涉及固废处理技术领域，尤其涉及一种炼钢除尘灰中游离氧化钙的消解方法。该消解方法主要包括以下步骤：将炼钢除尘灰置于消解容器中，用二氧化碳置换消解容器中的气体，然后注入饱和水蒸气，在特定压力和温度条件下消解，再用预冷的二氧化碳置换消解容器内的气体并降温。该消解方法不需要过高的反应温度和压力，且所需反应时间更短，消解效率高，有利于在生产中实现对炼钢除尘灰的规模化消解。消解后所得炼钢除尘灰粒度分布均匀，且单质铁不会在消解过程中被过多氧化，便于炼钢除尘灰的资源化利用和其中单质铁的回收。
Method for digesting free calcium oxide in steelmaking dedusting ash
一种炼钢除尘灰中游离氧化钙的消解方法
REN ZHANGCHAO (Autor:in) / YU YINGJIE (Autor:in)
30.10.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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