basic slag
noun
chiefly British
: a slag low in silica and high in base-forming oxides that is used in the basic process of steelmaking and that is subsequently useful as a fertilizer
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“Basic slag.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/basic%20slag. Accessed 4 Nov. 2025.
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