Fine slag and coarse slag are the
byproducts of the entrained-flow
gasifier, which may contain a considerable amount of carbonaceous
residue. In this study, the characteristics of slags (LHA, LHB, and
GT) from three commercial gasifiers were collected and studied. The
coal-water slurry (CWS) blended with these different slags (5 wt %)
was investigated in detail, including the apparent viscosity, contact
angle, and zeta potential. The experimental results showed that the
fine slag contained the residue carbon at normally higher than 15
wt % and the combustible content in coarse slag was mainly concentrated
in the particle size of 20–60 mesh. According to the reactivity
index, the residue carbon in slags from LHB and GT showed higher reactivity
compared to that of raw coal at 1300 °C. The addition of slag
would cause little increase of the apparent viscosity. The addition
of fine and coarse slag in CWS was better than the addition of fine
slag alone. CWS blended with slags would decrease the contact angle
of the samples. All the results showed the feasibility of the high-carbon-content
slag for coal water slurry preparation to achieve residual carbon
utilization.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.