由含铝酸及铝渣制备聚氯化铝铁净水剂

Preparation of poly-aluminum-ferric coagulant from aluminum foil corrosion waste hydrochloride acid and aluminum dross

以含铝酸和铝渣工业废弃物为原料，无需加热装置，一步法制备出价廉高效的液体聚合氯化铝铁（PAFC）净水剂，考察了与PAFC净水剂伟4备有关的因素（新老铝渣活性、液固比、盐基度、固液分离等），提供了合理的生产工艺及操作条件，实现了废物资源化再利用。制备PAFC最佳工艺条件为：利用含铝酸与新铝渣反应，控制液固比3．0，添加催化剂，保温（96-105℃）反应5h后，加入阳离子聚丙烯酰胺（CPAM）除悬浮物即得到液体成品PAFC。将制备的PAFC产品应用于弱酸性染整洗水混凝脱色处理。结果表明，PAFC产品盐基度对混凝脱色效果影响显著，盐基度越高，矾花出现速度快，且矾花颗粒大，沉淀速度快，脱色效果好。

The polymeric aluminum ferric chloride （PAFC） coagulant was prepared using aluminum foil corrosion hydrochloride acid and aluminum dross, and the chemical reaction was finished just in one-step without heating. Factors influencing preparation included the effect of new or old aluminum dross, liquid-solid ratio, basicity, suspended separation ect. The reasonable production process and operation conditions were provided. The optimum preparing technological parameters were found to be： liquid-solid ratio=3.0, adding catalytic additives, reaction and polymerization temperature was 96-105℃ holding for 5h, finally adding CPAM to separate suspended solid. The PAFC coagulant product was applied to treatment dying ＆ finishing wastewater with low pH. Water treatment experimental results showed that decolorization efficiency was obviously connecting with the basicity（B） of PAFC, and PAFC with high basicity has a good coagulating performance.