关键词: 铁尾矿, 吸附型陶粒, 重金属

Abstract: To enhance the comprehensive utilization value of iron tailings and broaden their resource utilization pathways，different types of iron tailings were blended as the main raw material for preparing ad⁃ sorption-type ceramsite materials. Through orthogonal experimental design and performance testing analy⁃ sis，it was found that the mechanical properties of most iron tailings ceramsite met the requirements of the "Water Treatment Artificial Ceramsite Filter Material" (CJ/T 299—2008) (sum of breakage rate and wear rate ≤ 6%)，and the removal rates of Cd²⁺ and Pb²⁺ were both higher than 80%，with stable removal effi⁃ ciency. The results showed that when the content of high-calcium-magnesium iron tailings in the blended raw materials was higher，the ceramsite exhibited more excellent mechanical properties. Conversely，when the content of high-aluminum iron tailings containing sulfur was higher，the removal efficiency of Cd²⁺ and Pb²⁺ further improved，with removal rates reaching over 90%. The research findings provide experimental evidence for the high-content resource utilization of iron tailings and their application in treating heavy metal-polluted water bodies through the "waste-to-treat-waste" approach.

Key words: iron tailings, adsorption type ceramsite, heavy metals