Lignin-anthracite briquettes made from 86-92% anthracite fines, 0-5.5% lignin, 4.5% silicon and 0-5.5 % collagen could substitute up to 25% coke in foundry cupolas. A morphological study of the briquettes will be carried out to understand the mechanisms that hold lignin-briquettes together at elevated temperatures and abrasion conditions. The briquettes will be pyrolyzed in a furnace at 800, and 1400°C under a nitrogen atmosphere at a flow rate 5 L/min to simulate the conditions of the drop and heat zones of a cupola. The pyrolyzed samples will be analyzed by reflected microscopy, nitrogen adsorption isotherms, SEM and TGA. These analyses will give information on the surface chemistry, surface area, pore size, pore wall thickness and pore network structure that will enlighten additional coke substitution in foundries with less energy intensive materials. We expect to find a well-defined and strong network made of lignin and silica that provides porosity required for gas diffusion along the cupola.

Morphological studies on lignin-anthracite briquettes

249th National Meeting (2015)

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