Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
System for preparing polyaluminum chloride from aluminum ash and preparation method of polyaluminum chloride
The invention belongs to the technical field of non-ferrous metallurgy environmental protection, and particularly relates to a system for preparing polyaluminum chloride from aluminum ash and a preparation method of the polyaluminum chloride. By applying the system, the aluminum ash is fully recycled and comprehensively utilized, metal aluminum in the screened aluminum ash can be used for a curing process after acid dissolution, the content of heavy metal in the polyaluminum chloride is reduced, and a high-quality polyaluminum chloride finished product is obtained; and ammonia gas generated in the alkali dissolution process can be absorbed by dilute sulphuric acid to obtain a byproduct ammonium sulfate, economic benefits are increased, calcium aluminate powder with the aluminum oxide content and the calcium oxide content reaching the standard is prepared through granulation and calcination, aluminum oxide in aluminum ash is fully activated, the aluminum content in the finished product polyaluminum chloride is increased, the grade of the finished product is improved, the economic benefit is increased, and the generated intermediate product calcium aluminate powder can be partially sold, the generated aluminum slag can be used for preparing ceramic particles, and waste heat of hot flue gas can be recovered through a heat exchanger for spray drying, so that the purposes of energy conservation and emission reduction are achieved.
本发明属于有色冶金环保技术领域，尤其是一种铝灰制备聚合氯化铝的系统及聚合氯化铝的制造方法。应用所述的系统将铝灰进行充分的资源化综合利用，筛分出来的铝灰中的金属铝可以用于酸溶后的熟化工艺，减少聚合氯化铝中重金属的含量，得到高质量的聚合氯化铝成品，碱溶过程中产生的氨气可以通过稀硫酸吸收得到副产品硫酸铵，增加了经济效益，通过造粒煅烧制得氧化铝和氧化钙含量都达标的铝酸钙粉，铝灰中的氧化铝得到充分活化，增加了成品聚合氯化铝中铝的含量，提高了成品的品级，增加了经济效益，生成的中间产物铝酸钙粉部分可以外售，产生的铝渣可以用于制陶粒，热烟气可以通过换热器回收余热用于喷雾干燥，达到节能减排。
System for preparing polyaluminum chloride from aluminum ash and preparation method of polyaluminum chloride
The invention belongs to the technical field of non-ferrous metallurgy environmental protection, and particularly relates to a system for preparing polyaluminum chloride from aluminum ash and a preparation method of the polyaluminum chloride. By applying the system, the aluminum ash is fully recycled and comprehensively utilized, metal aluminum in the screened aluminum ash can be used for a curing process after acid dissolution, the content of heavy metal in the polyaluminum chloride is reduced, and a high-quality polyaluminum chloride finished product is obtained; and ammonia gas generated in the alkali dissolution process can be absorbed by dilute sulphuric acid to obtain a byproduct ammonium sulfate, economic benefits are increased, calcium aluminate powder with the aluminum oxide content and the calcium oxide content reaching the standard is prepared through granulation and calcination, aluminum oxide in aluminum ash is fully activated, the aluminum content in the finished product polyaluminum chloride is increased, the grade of the finished product is improved, the economic benefit is increased, and the generated intermediate product calcium aluminate powder can be partially sold, the generated aluminum slag can be used for preparing ceramic particles, and waste heat of hot flue gas can be recovered through a heat exchanger for spray drying, so that the purposes of energy conservation and emission reduction are achieved.
本发明属于有色冶金环保技术领域，尤其是一种铝灰制备聚合氯化铝的系统及聚合氯化铝的制造方法。应用所述的系统将铝灰进行充分的资源化综合利用，筛分出来的铝灰中的金属铝可以用于酸溶后的熟化工艺，减少聚合氯化铝中重金属的含量，得到高质量的聚合氯化铝成品，碱溶过程中产生的氨气可以通过稀硫酸吸收得到副产品硫酸铵，增加了经济效益，通过造粒煅烧制得氧化铝和氧化钙含量都达标的铝酸钙粉，铝灰中的氧化铝得到充分活化，增加了成品聚合氯化铝中铝的含量，提高了成品的品级，增加了经济效益，生成的中间产物铝酸钙粉部分可以外售，产生的铝渣可以用于制陶粒，热烟气可以通过换热器回收余热用于喷雾干燥，达到节能减排。
System for preparing polyaluminum chloride from aluminum ash and preparation method of polyaluminum chloride
一种铝灰制备聚合氯化铝的系统及聚合氯化铝的制造方法
ZHANG YELING (Autor:in) / ZHENG XIANQIANG (Autor:in) / SUN YANAN (Autor:in) / YOU WEI (Autor:in)
13.08.2021
Patent
Elektronische Ressource
Chinesisch
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
/
C01C
Ammoniak
,
AMMONIA
/
C04B
Kalk
,
LIME
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