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Method for resource utilization of hot steel slag
The invention discloses a hot steel slag resource utilization method which is characterized in that calcium carbonate and carbon dioxide gas is preheated, downward flowing steel slag hot liquid is blown away and mixed, when steel slag is blown away, granulated and cooled, calcium carbonate is heated and decomposed into calcium oxide and carbon dioxide in hot steel slag particles, and the calcium carbonate and the carbon dioxide are recycled. The carbon dioxide gas promotes the formation of porous structures in the steel slag particles, and calcium oxide and steel slag are combined to become alkaline slag particles; the power generation tail gas is cooled, dedusted and separated, and solid calcium carbonate particles are returned; boosting the dedusted gas, using part of the dedusted gas as conveying gas of granular calcium carbonate, and discharging part of the dedusted gas for preparing liquid carbon dioxide; the ground alkaline slag particles are used as steel slag cement, and the alkaline steel slag is used for preheating carbon dioxide gas. The problem that balanced utilization and high-added-value recycling are difficult to carry out in the hot steel slag heat recovery process is solved.
本发明公开了一种热钢渣资源化利用的方法，其特征在于：预热碳酸钙二氧化碳气体，对向下流动钢渣热液体进行吹散掺混，钢渣被吹散粒化冷却的同时，碳酸钙在热钢渣颗粒内部被加热分解成氧化钙与二氧化碳，二氧化碳气体促使钢渣颗粒内部形成多孔结构，氧化钙与钢渣结合变成碱式渣粒；高温气体送去作为发电热源，发电尾气降温除尘，分离并返回固体碳酸钙颗粒；除尘后的气体升压，部分用作粒状碳酸钙的输送气体，部分外排用于制造液体二氧化碳；碱式渣粒磨碎后用作钢渣水泥，碱式钢渣用于二氧化碳气体预热。本发明解决了热钢渣热量回收过程中难以进行均衡利用与高附加值资源化的问题。
Method for resource utilization of hot steel slag
The invention discloses a hot steel slag resource utilization method which is characterized in that calcium carbonate and carbon dioxide gas is preheated, downward flowing steel slag hot liquid is blown away and mixed, when steel slag is blown away, granulated and cooled, calcium carbonate is heated and decomposed into calcium oxide and carbon dioxide in hot steel slag particles, and the calcium carbonate and the carbon dioxide are recycled. The carbon dioxide gas promotes the formation of porous structures in the steel slag particles, and calcium oxide and steel slag are combined to become alkaline slag particles; the power generation tail gas is cooled, dedusted and separated, and solid calcium carbonate particles are returned; boosting the dedusted gas, using part of the dedusted gas as conveying gas of granular calcium carbonate, and discharging part of the dedusted gas for preparing liquid carbon dioxide; the ground alkaline slag particles are used as steel slag cement, and the alkaline steel slag is used for preheating carbon dioxide gas. The problem that balanced utilization and high-added-value recycling are difficult to carry out in the hot steel slag heat recovery process is solved.
本发明公开了一种热钢渣资源化利用的方法，其特征在于：预热碳酸钙二氧化碳气体，对向下流动钢渣热液体进行吹散掺混，钢渣被吹散粒化冷却的同时，碳酸钙在热钢渣颗粒内部被加热分解成氧化钙与二氧化碳，二氧化碳气体促使钢渣颗粒内部形成多孔结构，氧化钙与钢渣结合变成碱式渣粒；高温气体送去作为发电热源，发电尾气降温除尘，分离并返回固体碳酸钙颗粒；除尘后的气体升压，部分用作粒状碳酸钙的输送气体，部分外排用于制造液体二氧化碳；碱式渣粒磨碎后用作钢渣水泥，碱式钢渣用于二氧化碳气体预热。本发明解决了热钢渣热量回收过程中难以进行均衡利用与高附加值资源化的问题。
Method for resource utilization of hot steel slag
一种热钢渣资源化利用的方法
YANG HAO (author) / ZHONG RUOYU (author) / WANG JUANYUN (author) / YANG PENG (author) / QU SILIN (author)
2023-12-12
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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