Method of producing metallurgical coke and method of evaluating thermoplasticity

A method of producing metallurgical coke by dry distillation of raw material in a chamber-type coke oven to produce metallurgical coke, wherein

• the raw material contains, at 30 wt % or less relative to the raw material total, one or both of isolated lignin and organic solvent extract from isolated lignin that have a weight-average molecular weight of 3100 or less.

A method of producing metallurgical coke by dry distillation of raw material to produce metallurgical coke, the method comprising:

• measuring a permeation distance of one or both of isolated lignin and organic solvent extract from isolated lignin;
• and
• using one or both of isolated lignin and organic solvent extract from isolated lignin for which the permeation distance measured is a predetermined reference value or greater, as a portion of the raw material.

A method of producing metallurgical coke by dry distillation of raw material to produce metallurgical coke, the method comprising:

• measuring a weight-average molecular weight of one or both of isolated lignin and organic solvent extract from isolated lignin;
• and
• using one or both of isolated lignin and organic solvent extract from isolated lignin for which the weight-average molecular weight measured is a predetermined reference value or less, as a portion of the raw material.

A method of evaluating thermoplasticity, the method comprising measuring a permeation distance of isolated lignin or organic solvent extract from isolated lignin to evaluate the thermoplasticity of the isolated lignin or organic solvent extract from isolated lignin.