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A platform for research: civil engineering, architecture and urbanism
Method for preparing polyaluminum chloride and co-producing baking-free environment-friendly brick from aluminum ash
The invention provides a method for preparing polyaluminum chloride and co-producing an unfired environment-friendly brick from aluminum ash. The method comprises the following steps: ball-milling the aluminum ash, and screening; adding the screen underflow into water to obtain aluminum mortar; hydrochloric acid is added into the aluminum mortar, and acid leaching liquid and acid leaching residues are obtained through separation; adjusting the pH value of the pickle liquor, polymerizing and curing to obtain polyaluminum chloride; the baking-free environment-friendly brick is prepared by taking the acid leaching residues as raw materials. According to the method disclosed by the invention, the screen underflow is added into the water for denitrification and defluorination, so that the aluminum ash can be prevented from polluting underground water and soil, the aluminum ash subjected to denitrification and defluorination is used for producing the polyaluminum chloride, the content of Alb (Al13) in an optimal coagulation form is up to 60%, and high value and resource utilization of the aluminum ash are realized; meanwhile, the prepared baking-free brick is excellent in performance, the compressive strength is as high as 30MPa, the production cost is low, the energy consumption is low, the manufacturing process is simple, the environmental pollution caused by the waste aluminum ash slag can be preferentially reduced, and the full-quantitative comprehensive utilization of the aluminum ash is realized.
本发明提供了一种铝灰制备聚合氯化铝联产免烧环保砖的方法，包括：将铝灰球磨后筛分；将筛下物加入至水中，得到铝灰浆；向铝灰浆中加入盐酸分离得到酸浸液和酸浸渣；将酸浸液调节pH后，聚合、熟化即得聚合氯化铝；以酸浸渣为原料制备得到免烧环保砖。本发明的方法将筛下物加入至水中进行脱氮除氟，可以防止铝灰对地下水以及土壤产生污染，脱氮除氟后的铝灰用于生产聚合氯化铝，其中的最佳凝聚混凝形态Alb(Al13)含量高达60％，实现铝灰的高值化、资源化；同时制备的免烧砖性能优良，抗压强度高达到30MPa，生产成本低、能源消耗少、制作工艺简单，能够优先减少废弃铝灰渣造成的环境污染，实现铝灰全量化综合利用。
Method for preparing polyaluminum chloride and co-producing baking-free environment-friendly brick from aluminum ash
The invention provides a method for preparing polyaluminum chloride and co-producing an unfired environment-friendly brick from aluminum ash. The method comprises the following steps: ball-milling the aluminum ash, and screening; adding the screen underflow into water to obtain aluminum mortar; hydrochloric acid is added into the aluminum mortar, and acid leaching liquid and acid leaching residues are obtained through separation; adjusting the pH value of the pickle liquor, polymerizing and curing to obtain polyaluminum chloride; the baking-free environment-friendly brick is prepared by taking the acid leaching residues as raw materials. According to the method disclosed by the invention, the screen underflow is added into the water for denitrification and defluorination, so that the aluminum ash can be prevented from polluting underground water and soil, the aluminum ash subjected to denitrification and defluorination is used for producing the polyaluminum chloride, the content of Alb (Al13) in an optimal coagulation form is up to 60%, and high value and resource utilization of the aluminum ash are realized; meanwhile, the prepared baking-free brick is excellent in performance, the compressive strength is as high as 30MPa, the production cost is low, the energy consumption is low, the manufacturing process is simple, the environmental pollution caused by the waste aluminum ash slag can be preferentially reduced, and the full-quantitative comprehensive utilization of the aluminum ash is realized.
本发明提供了一种铝灰制备聚合氯化铝联产免烧环保砖的方法，包括：将铝灰球磨后筛分；将筛下物加入至水中，得到铝灰浆；向铝灰浆中加入盐酸分离得到酸浸液和酸浸渣；将酸浸液调节pH后，聚合、熟化即得聚合氯化铝；以酸浸渣为原料制备得到免烧环保砖。本发明的方法将筛下物加入至水中进行脱氮除氟，可以防止铝灰对地下水以及土壤产生污染，脱氮除氟后的铝灰用于生产聚合氯化铝，其中的最佳凝聚混凝形态Alb(Al13)含量高达60％，实现铝灰的高值化、资源化；同时制备的免烧砖性能优良，抗压强度高达到30MPa，生产成本低、能源消耗少、制作工艺简单，能够优先减少废弃铝灰渣造成的环境污染，实现铝灰全量化综合利用。
Method for preparing polyaluminum chloride and co-producing baking-free environment-friendly brick from aluminum ash
一种铝灰制备聚合氯化铝联产免烧环保砖的方法
WU XU (author) / HE ZIYANG (author) / TAN XINYU (author) / ZHANG HAIQUAN (author) / LU SHAOKENG (author) / LIN WENLIANG (author) / WU GUOQING (author) / WEN HAOHUA (author) / QUAN YONGZHI (author) / LI YAN (author)
2022-07-12
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
/
C01C
Ammoniak
,
AMMONIA
/
C04B
Kalk
,
LIME
/
C22B
PRODUCTION OR REFINING OF METALS
,
Gewinnen oder Feinen von Metallen
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