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The invention discloses a method for preparing nano calcium carbonate through carbon dioxide adsorption by using steel slag, and relates to the technical field of solid waste/fixed carbon utilization. Leaching and extracting Ca < 2 + > in the residual components by using ammonium salt for adsorbing and curing carbon dioxide to prepare nano calcium carbonate; and finally, the residual residues, slag, desulfurized fly ash and other bulk solid wastes are used for preparing a cementing material for manufacturing floor tiles or roadway filling. The comprehensive utilization value of the steel slag is effectively improved, the problem that a large number of land resources are occupied due to the fact that the steel slag cannot be effectively utilized is solved, the influence of carbon dioxide on the environment is also solved, and the national strategic goal of reaching carbon peak/carbon neutralization is facilitated; meanwhile, high-value nano calcium carbonate is produced. The method has great economic benefits and social benefits, and has a good application prospect.
利用钢渣进行二氧化碳吸附制备纳米碳酸钙的方法，涉及固废/固碳利用技术领域，该方法预先磁选出钢渣中高铁成分，用于冶金煅烧回收Fe；再利用铵盐将剩余成分中的Ca2+浸出提取出，用于二氧化碳的吸附固化制备纳米碳酸钙；最终将剩余残渣与矿渣、脱硫灰等大宗固废一起制备胶凝材料用于制造地砖或巷道充填。本发现有效的提高了钢渣的综合利用价值，即解决了钢渣无法有效利用占用大量土地资源，又解决了二氧化碳对环境造成的影响，有助于国家达到碳达峰/碳中和战略目标；同时生产了高价值纳米碳酸钙。本发明具有很大的经济效益和社会效益，具有良好的应用前景。
The invention discloses a method for preparing nano calcium carbonate through carbon dioxide adsorption by using steel slag, and relates to the technical field of solid waste/fixed carbon utilization. Leaching and extracting Ca < 2 + > in the residual components by using ammonium salt for adsorbing and curing carbon dioxide to prepare nano calcium carbonate; and finally, the residual residues, slag, desulfurized fly ash and other bulk solid wastes are used for preparing a cementing material for manufacturing floor tiles or roadway filling. The comprehensive utilization value of the steel slag is effectively improved, the problem that a large number of land resources are occupied due to the fact that the steel slag cannot be effectively utilized is solved, the influence of carbon dioxide on the environment is also solved, and the national strategic goal of reaching carbon peak/carbon neutralization is facilitated; meanwhile, high-value nano calcium carbonate is produced. The method has great economic benefits and social benefits, and has a good application prospect.
利用钢渣进行二氧化碳吸附制备纳米碳酸钙的方法，涉及固废/固碳利用技术领域，该方法预先磁选出钢渣中高铁成分，用于冶金煅烧回收Fe；再利用铵盐将剩余成分中的Ca2+浸出提取出，用于二氧化碳的吸附固化制备纳米碳酸钙；最终将剩余残渣与矿渣、脱硫灰等大宗固废一起制备胶凝材料用于制造地砖或巷道充填。本发现有效的提高了钢渣的综合利用价值，即解决了钢渣无法有效利用占用大量土地资源，又解决了二氧化碳对环境造成的影响，有助于国家达到碳达峰/碳中和战略目标；同时生产了高价值纳米碳酸钙。本发明具有很大的经济效益和社会效益，具有良好的应用前景。
Method for preparing nano calcium carbonate through carbon dioxide adsorption by using steel slag
利用钢渣进行二氧化碳吸附制备纳米碳酸钙的方法
2023-12-08
Patent
Electronic Resource
Chinese
IPC:
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
/
B82Y
Bestimmter Gebrauch oder bestimmte Anwendung von Nanostrukturen
,
SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
/
C04B
Kalk
,
LIME
/
C21B
Gewinnung von Eisen oder Stahl
,
MANUFACTURE OF IRON OR STEEL
/
C22B
PRODUCTION OR REFINING OF METALS
,
Gewinnen oder Feinen von Metallen
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