分别以甲基萘磺酸盐(MF)及改性碱木质素磺酸钠(B1)为分散剂,考查了水葫芦与神府煤的成浆性能。结果表明,当100 g煤中加入19.16 g的水葫芦时,以MF为分散剂,60%浓度水葫芦煤浆的表观黏度为1 154 mPa.s,Fe2(SO4)3改性水葫芦煤浆的表观黏度为999 mPa.s。以B1为分散剂,水葫芦煤浆的表观黏度略有提高。Fe2(SO4)3的加入减少了与水缔合的含氧官能团数量,增加了水葫芦中起降黏作用的自由水含量。水葫芦能有效的提高水煤浆的稳定性,使出现硬沉淀的时间从2 h延长到60 h,Fe2(SO4)3作用后的水葫芦可进一步提高水煤浆的稳定性,使其出现硬沉淀的时间延长到88 h以上。水葫芦中大量的亲水性含氧官能团以及纤维素等大分子是水煤浆稳定性提高的主要原因。
The co-slurryability of water hyacinth and Shenfu coal was investigated with 2 dispersants,methyl-naphthalene sulfonate sodium formaldehyde condensate(MF) and modified sodium lignosulphonate(B1).The results show that when mixing 19.16g water hyacinth into 100 g coal,the apparent viscosity of coal-hyacinth slurry(60%) was 1154mPa·s using MF as dispersant;and it decreased to 999mPa·s while water hyacinth is modified by Fe2(SO4)3.Using B1 as dispersant the apparent viscosity of coal-hyacinth slurry(60%) decreased slightly.Fe2(SO4)3 reduced the number of hydrogen bonding oxygen-containing functional groups,and increased the content of free water in hyacinth.The stability of coal-water slurry is improved by adding water hyacinth,and the sedimentation time increases from 2h to 60h.Fe2(SO4)3 can further improve the stability of coal-water slurry with sedimentation time up to 88h.The hydrophilic oxygen-containing functional groups and cellulose in water hyacinth play the key role in improving the stability of coal water slurry.