... is one of the leading China carbon black n550 manufacturers and suppliers, equipped with professional ... quality carbon black produced according to ASTM standards. - Grades: N220, N234, N326, N330, N339,N351, N375, N550, N660. ... carbon black manufacturing enterprises, the tail gas turbine equipped with conventional production reached 30MW. We can produce N220, N330, N234, N339, N351, N550, N660 ...