化工矿物与加工2026，Vol.55Issue(8)：1-6,6.DOI:10.16283/j.cnki.hgkwyjg.2026.08.001
APAM/SA复合絮凝剂对铝土矿洗矿矿泥的絮凝沉降效果及机理研究
Study on the flocculation-sedimentation effect and mechanism of APAM/SA composite flocculant on bauxite washing slime
摘要
Abstract
Bauxite ore washing is the key link of its processing and impurity removal.The slime produced in the process of ore washing has low solid-liquid separation efficiency due to its fine particle size and strong colloidal stability.The traditional single flocculant has problems such as large dosage and insufficient adaptability.Based on this,this paper systematically explores the sedimentation effect and mechanism of anionic polyacrylamide(APAM)and sodium alginate(SA)composite flocculant on slime.X-ray diffraction(XRD)and X-ray fluorescence spectroscopy(XRF)were used to analyze the mineral and elemental composition of bauxite washing slime.The effects of APAM,SA single and composite systems on the sedimentation rate of slime were investigated by flocculation sedimentation test.The flocculation mechanism was revealed by means of laser particle size analysis,Fourier transform infrared spectroscopy(FT-IR)and X-ray photoelectron spectroscopy(XPS).The results show that the main minerals in the slime are kaolinite,quartz and diaspore,the mass fraction of Al2O3 is 40.43％,and the ratio of Al2O3 to SiO2 is 0.92.The flocculation rate of APAM/SA composite flocculant reached 101.01 mL/s when the ratio was 3:1 and the dosage was 60 mg/L,which was significantly higher than that of single flocculant.After APAM/SA treatment,the overall particle size of flocs formed by slime is larger,and its stability is better than that of flocs formed by single floc-culant treatment.The flocculant promotes the flocculation of the slime through the synergistic effect of the carboxyl group of SA and the amide group of APAM.The research results can provide reference for the efficient treatment of bauxite washing slime.关键词
絮凝剂/铝土矿/矿泥/沉降效果/作用机理/聚丙烯酰胺/海藻酸钠Key words
flocculant/bauxite/slime/settling effect/mechanism of action/polyacrylamide/sodium alginate分类
矿业与冶金引用本文复制引用
梁义林,蒙创杰,李欣瑞,孙文瀚..APAM/SA复合絮凝剂对铝土矿洗矿矿泥的絮凝沉降效果及机理研究[J].化工矿物与加工,2026,55(8):1-6,6.基金项目
广西青年科技人才工程资助项目(GXYESS2025100) （GXYESS2025100）
广西壮族自治区大学生创新训练计划自治区级基金项目(S202410593196). （S202410593196）
