摘要
针对煤泥制浆中灰分对分散剂分散效果的不利影响,设计并合成了耐盐型聚羧酸分散剂,通过红外分析、表面电位测定和制浆试验考察了该分散剂的性能。研究表明:聚羧酸分散剂与煤样结构相似,具有很好的匹配性;分散剂与煤颗粒结合后,煤粒表面的电位明显降低,电负性显著提高;聚羧酸系分散剂的相对分子质量处于110 000～170 000时,制浆效果最佳、最为稳定;与木系和萘系分散剂相比,利用聚羧酸系分散剂制备的水煤浆浆体质量分数达61%左右,且浆体表现出良好的流动性稳定性,分散效果最好。
According to the adverse influence of the ash content to the dispersed effect of the dispersant in the slime water slurry prepara- tion, a salt resistance mode polycarboxylate dispersant was designed and synthetised. The performances of the dispersant were investigated with the infrared analysis, the surface potential detection and the slurry preparation experiment. The study results showed that the polycar- boxylate dispersant and the coal sample had a similar structure and had a good fitting. When the dispersant and coal particles integrated, the surface potential of the coal particle would be obviously reduced and the electronegativity would be remarkably increased. When the rel- ative molecule quantity of the polycarboxylate dispersant was 110 000-170 000,the slurry preparation effect would the be best and most stable. In comparison with the wood and naphthalene series dispersants, the slurry density of the coal water slurry prepared with the poly- carboxylate dispersant would be about 61% ,the slurry would have good flowability and stability and the dispersion effect was the best.
出处
《煤炭科学技术》
CAS
北大核心
2013年第10期121-124,共4页
Coal Science and Technology
基金
国家自然科学基金资助项目(51204179
51204182)
江苏省普通高校研究生科研创新计划资助项目(CXLX11-0328
CXLX11-0330)
关键词
高灰煤泥
聚羧酸分散剂
水煤浆
成浆性
ZETA电位
high ash slime
polycarboxylate dispersant
coal water slurry
slurry ability
Zeta potential
