Abstract:

The ability of making slurry with naphthalene series dispersant KY33 developed by China university of mining and technology (Beijing) as additive for coal water slurry and the improvement of its stability were studied with coals of two different ranks by adding a small amount of lignosulfonate. According to the pulping experiment, the reasonable proportion of coal sample and the optimal dose of KY33 were determined, and to improve the stability of CWS by combining with sodium lignosulfonate. The stability of CWS was investigated using Turbiscan Lab stability analyzer. The results showed that the optimal dose of KY33 varied with the coal ranks, but the effect of KY33 and the slurry stability could be effectively improved by combining with a moderate amount of lignosulfonate.

Key words: coal water slurry, naphthalene series dispersant, sodium lignosulfonate, stability