The invention provides black liquid
charcoal. The raw materials of the
charcoal comprise at least
fuel wood, shrubs, branches, barks,
wood processing residues or deserted artificial boards and the like, two components of the raw materials and alkali
lignin are mixed, and then cooling
compression molding is conducted through a pressing
machine, and
carbonization is conducted so that the black liquid
charcoal is made. The
fuel wood, the shrubs, the branches, the barks, the
wood processing residues or the deserted artificial boards and the like are hard to be utilized by
machine-made charcoal manufacturing and are usually burned off or rotted, utilization degree is low, the alkali
lignin is also a problem in black liquid recycling management, the alkali
lignin is produced by
soda pulping or
sulfate pulping through acidification, the alkali lignin has the characteristics of high-
viscosity and high-calorific value, the two components of the raw materials and the alkali lignin are mixed and then the cooling
compression molding is conducted through the pressing
machine, and
carbonization is conducted so that the black liquid charcoal is made. The produced carbon is high in caloric value, not prone to crushing, high in application range and
utilization rate, in addition a large number of alkali lignin resources produced in the process of pulping and
papermaking can be utilized sufficiently, and therefore the pressure of environmental management is relieved.