With red mud immersion hydrochloride, NaOH as raw materials in the polymerizatio-nreaction under a certain temperature, dry preparation of inorganic high efficiency flocculant-study of polyaluminium chloride calcium. Results showed that the addition of NaOH amount is 1 mol, PH value of 3, when the reaction temperature was 60 ℃, More suitable for the synthesis of the product.% 以赤泥盐酸浸出液、NaOH为原料在一定条件下进行反应聚合、干燥制备无机高分子混凝剂-聚合氯化铝钙的研究。结果显示NaOH的加入量为1 mol，PH值为3，反应温度为60℃，较适宜于产品的合成。
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