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Abstract
Anionic aliphatic is one of the most promising and applicable additives for preparation of coal–water slurry. Anionic aliphatic was synthesised and was further characterised by Fourier transform infrared, zeta potentials, apparent viscosities and static stabilities. The properties of anionic aliphatic as additive for coal–water slurry were evaluated. For the coal–water slurry with solid content of 65 wt-% adding 0.5 wt-% additive, the apparent viscosity was 322 mPa.s, and the static stability was good (i.e. the penetration ratio of the sample was 80.3%). Results showed that the coal–water slurry with anionic aliphatic additive had good properties. The coal–water slurry performances can be further improved via application of two additives (i.e. polycarboxylate and aliphatic) simultaneously because of steric hindrance, hydrophilic improvement and electrostatic force effects.