Procedure to control quality of coal
AssigneeRuhrkohle Aktiengesellschaft
InventorsWilhelm Weskamp, Gerd Nashan, Wilhelm Stewen
Life of this patent
Estimating the term…
Abstract
The quality of coke is improved by measuring the width of a plastic zone of a given type of coal, comparing said measured zone with a predetermined zone width known to result in good quality coke, adjusting certain characteristics of said given coal prior to charging it into the coke oven to cause a change in said zone width of the coal that will ultimately result in improved coke quality. Typical adjusting steps include preheating the coal and/or the addition of coal binders, such as, various carbon and petro-based binding agents, for example, pitch.
Claims11
A method for producing coke of a desired quality from coal in a coking cycle, comprising the steps of:
- charging a portion of said coal into a coke oven;
- obtaining temperature measurements of the portion of said coal charged into a coke oven during the coking cycle of said coal, said temperature measurements being taken incrementally from the coke oven chamber wall towards the center of said oven chamber;
- determining a temperature contour of the portion of said coal charge during the coking cycle of said charge, said temperature contour being based on said incremental temperature measurements;
- measuring the width of a plastic zone in said coal as reflected in said temperature contour;
- comparing said measured plastic zone width with a predetermined plastic zone width that is known to result in the production of coke of a desired quality;
- adjusting at least one characteristic of a further portion of said coal so as to result in a change in the width of the plastic zone of said coal when said further portion is charged into the coke oven, said adjustment resulting in a plastic zone, having a width that more nearly resembles said predetermined plastic zone width;
- charging said adjusted further portion of coal into the coke oven;
- and
- heating said adjusted further portion of charged coke to produce coke of the desired quality.
Dependencies are inferred from the claim text.