Inorganic Chemicals Industry ›› 2022, Vol. 54 ›› Issue (4): 135-140.doi: 10.19964/j.issn.1006-4990.2021-0399

• Environment·Health·Safety • Previous Articles     Next Articles

Preparation and properties characterization of water quenching slag-fly ash based 4A zeolite

CUI Jiaxin1(),WANG Lianyong1,2(),LI Yao1,HE Yan1,WANG Rui1,HAN Jianli1   

  1. 1. School of Metallurgy,Northeastern University,Shenyang 110819,China
    2. State Environmental Protection Key Laboratory of Eco-Industry
  • Received:2021-07-05 Online:2022-04-10 Published:2022-04-18
  • Contact: WANG Lianyong E-mail:cjxneu@163.com;wlyneu@126.com

Abstract:

Fly ash is often used as the raw material for synthetic zeolite because of its main components are SiO2 and Al2O3.The main types of synthetic zeolite are X-type,Y-type,A-type,ZSM-5,etc.The related synthesis technology is also very mature.Water quenching slag is the blast furnace slag produced by quenching of blast furnace ironmaking water.Its main utilization method is as cement and roadbed materials,all of which are low value-added utilization.4A zeolite was synthesized by the alkali melting hydrothermal method using water quenching slag and fly ash mixed raw materials.The influence of silicon-toaluminum ratio,melting temperature,melting time,and crystallization time on the quality of the prepared zeolite samples was explored preliminarily,and the obtained best preparation conditions were:silicon-to-aluminum ratio of 1.0,alkali-to-ash ratio of 1.5,alkali melting time of 1 h,alkali melting temperature of 600 ℃,aging time of 12 h,gray-water ratio of 1∶5,crystallization temperature of 90 ℃,crystallization time of 16 h.The synthesized zeolite was characterized by XRD,XRF,SEM,FT-IR,etc.The results showed that the 4A zeolite synthesized by water quenching slag and fly ash had good performance in all aspects and had ultra-high industrial production value.

Key words: fly ash, water quenching slag, 4A zeolite, performance characterization

CLC Number: