絮凝剂对粗精煤泥离心脱水效果的影响研究

Study of the effect of flocculant on centrifugal dewatering of coarse-grained cleaned slime

摘要: 为了降低华宁选煤厂TBS粗精煤泥水分，分别采用了分子量为300万的阴离子型、阳离子型和非离子型的聚丙烯酰胺进行了粗精煤泥离心脱水试验。试验结果表明：三种类型聚丙烯酰胺对TBS粗精煤泥的脱水均有一定的促进作用，其中以阳离子型聚丙烯酰胺的脱水效果最好，当阳离子型聚丙烯酰胺用量为500 g/t时，粗精煤泥水分可降低至6.9%；阴离子型聚丙烯酰胺的脱水效果次之；非离子型聚丙烯酰胺仅在低浓度时有较好的脱水效果。

Abstract: In order to reduce the moisture of the coarse-grained clean slime product of teetered-bed separator of Huaning Coal Washery, test on centrifugal dewatering of the slime is conducted with anionic, cationic and nonionic polyacrylamide with a molecular weight of 300 million, respectively. Test result shows that the 3 kinds of polyacrylamide, APAM, CPAM and NPAM, can help promote centrifugal dewatering of TBS's product to varying extent. The CPAM is most effective and at a dosage of 500 g/t, the product moisture of centrifuge can be lowered down to 6.19%. The APAM comes second. A fairly good effect can also be expected with the use of NPAM but only at a low concentration.