coke breeze

A by-product of coke manufacture; it is the residue from the screening of heat-treated coke. The particle size is less than $10 mm$ . Generally, coke breeze has a volatile matter content of $< 3 wt.%$ .

Source:

PAC, 1995, 67, 473 (Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)) on page 486