Wiktionary – Appendix:Dictionary of Mining, Mineral, and Related Terms/F/3 – Wiktionary

A direct process for manufacturing steel, by means of which iron with a carbon content from 0.2% upwards can be produced by smelting, in a specially constructed electrical furnace, a mixture of hematite and coal, or charcoal, the process being continuous.

Wiktionary – Appendix:Dictionary of Mining, Mineral, and Related Terms/C/7 – Wiktionary

The process involves heating oxidized copper ore with a reducing agent and a halide salt at about 700 degrees C to produce metallic copper, which may then be recovered by ammonia leaching or by flotation with conventional copper sulfide collectors.

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