2619.00 - Slag, dross (other than granulated slag), scalings and other waste from the manufacture of iron or steel:

This HTS category, 2619.00, encompasses residual materials generated during the production of iron and steel. It specifically includes slag and dross, excluding granulated slag which has distinct industrial applications. Also covered are scalings, which are thin layers of oxide formed on the surface of hot metal during processing, and other miscellaneous waste materials from iron and steel manufacturing. The key characteristic is that these are by-products or waste streams originating from the metallurgical processes involved in iron and steel production.

Unlike sibling categories that might cover a wider range of mineral products (as suggested by Section V), Chapter 26 is specifically dedicated to ores, slag, and ash. Within this chapter, 2619.00 focuses solely on the waste generated by iron and steel manufacturing, distinguishing it from other slag or ash classifications that may arise from different industrial processes or naturally occurring formations.

The subcategories under 2619.00 provide further refinement based on the specific type of waste. For instance, 2619.00.30.00 specifically identifies "ferrous scale," which are the oxide layers removed from steel during hot rolling. The broader category, 2619.00.90.00, serves as a catch-all for all other iron and steel manufacturing wastes not otherwise specified, ensuring comprehensive classification of all relevant by-products.