摘要
以大唐呼化现场制浆用煤为原料,使用单棒磨工艺和粒度级配工艺制浆,考察木质素系、萘系和腐殖酸系分散剂对煤样成浆性的影响,通过测定不同添加剂对煤粉悬浮液zeta电位的影响和煤粉对3种添加剂的极限吸附量的变化,研究3种分散剂的作用机理。结果表明:东明煤、金新煤和混煤的最高成浆浓度,随着分散剂使用量的增大先增加后趋于平稳,分散剂具有最佳使用量与分散剂种类、煤样性质和制浆工艺有关。添加剂分散性能优劣顺序为:腐殖酸系>萘系>木质素系,原因为腐殖酸系和萘系添加剂在煤粉表面吸附较少且可有效防止煤粒相互聚集沉淀。综合考虑3种分散剂的性能、最佳使用量、经济性以及对煤样最高成浆浓度的影响,最终选定萘系分散剂作为大唐呼化现场制浆用分散剂。
The effect of lignin,naphthalene and humic acid dispersants on the slurry ability of Datang Huhua coal was investigated by single rod mill and particle size grading.The mechanisms of three dispersants were studied by measuring the effect of different additives on zeta potential of pulverized coal suspension and the change of the limit adsorption capacity of pulverized coal to three additives.The results show that the maximum slurry concentration of Dongming coal,Jinxin coal and blended coal first increases and then tends to be stable with the increase of dispersant dosage.The optimal dispersant dosage is related to dispersant type,coal sample properties and pulping process.The results show that the order of dispersibility of additives is humic acid>naphthalene>lignin.The reason is that humic acid and naphthalene have less adsorption on the surface of pulverized coal and can effectively prevent coal particles from accumulating and precipitating.Considering the performance,optimum dosage and economy of three dispersants and their influence on the maximum slurry concentration of coal sample,finally naphthalene dispersant was selected as dispersant for Datang Huhua field pulping.
作者
唐岩超
TANG Yanchao(Datang Hulunbuir Chemical Fertilizer Corporation Ltd.,Hulunbuir 021000,China)
出处
《煤质技术》
2021年第1期63-68,74,共7页
Coal Quality Technology
基金
大唐集团技改基金资助项目(DTJG2016—SD001)。
关键词
褐煤
水煤浆
分散剂
ZETA电位
极限吸附量
粒度级配工艺
最佳使用量
lignite
coal water slurry
dispersant
zeta potential
limit adsorption quantity
particle size distribution process
optimum usage quantity
