复合型絮凝剂CaCl-APAM-PAC快速处置高含水率泥浆试验研究

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中图分类号：X799.1 文献标志码：A 文章编号：2096-6717（2025）04-0234-09

Experimental study on rapid disposal of high moisture content mud by composite floccunt CaCl2 -APAM-PAC

MA Yingjian1a， FANG Zhou1a，CHENG Huifeng1b， SU Bin1b， PENG Xiaochuang²， NIEXiaoqing²，LIANG Dengqin1a，QIN Xinhao1a，HEBin1a （la.CollegeofCivil Engineering;1b.ColegeofChemical Engineeringand Technology，Taiuan UniversityofTechnology， Taiyuan O3O024，P.R.China;2.Shanxi Academy of Building Sciences Group Co.，Ltd.，Taiyuan O3Ooo1，P.R.China）

Abstract：In engineering construction，waste mud often contains an extremely high water content that car

Received：2023-04-01

significantly impact the environment.Addressng the issue of dehydration is therefore a primary concern.To address the problem of high water content mud water separation，this study selected three types of flocculants CaCl2 ， anionic polyacrylamide （APAM）and poly aluminum chloride （PAC），and then designed a 3-factor and 4- level orthogonal experiment using the comprehensive balance method.Indicators such as the 48-hour dehydration amount and pH value of the supernatant were selected，and range analysis and variance analysis were conducted to find the optimal combination of composite flocculants.The flocculation mechanism was also discussed through orthogonal test results and SEM microanalysis. The experimental results showed that dividing the dehydration rate curve over time into high，medium，and low dehydration zones，as wellas fast and slow dehydration stages，led to adecrease in the overall mud dehydration rate.However，the high dehydration zone group had a higher dehydration rate at 12h ，which met the requirements for fast dehydration. Additionally， the three flocculants showed some synergistic effect.Through range analysis of variance analysis orthogonal tests，the optimal combination of composite flocculants was found to be 0.25gCaCl2+0.12gAPAM+0.17g PAC per 100g total mass of slurry. Based on the mechanism analysis，the flocculation process of composite flocculants was divided into five stages： charge neutralization stage，bridging stage，adsorption agglomeration stage，network sedimentation stage，and solidification enhancement stage.

Keywords： orthogonal experiment; composite flocculant; high moisture content mud; flocculation mechanism

泥浆是一种泥水混合物，主要由水、外加剂、膨润土颗粒及黏性土颗粒组成[1。（剩余14460字）