oxygen and lime bottom blowing

metallurgy

Also known as: OBM, Oxygen bodenblasen Maxhuette, Q-BOP, bottom-blown oxygen steelmaking, quick-quiet BOP

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In basic oxygen process
…in North America and the OBM (from the German, Oxygen bodenblasen Maxhuette, or “oxygen bottom-blowing furnace”) in Europe. In this system, oxygen is injected with lime through nozzles, or tuyeres, located in the bottom of the vessel. The tuyeres consist of two concentric tubes: oxygen and lime are introduced through…
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In steel: Variations
Another system, called the Q-BOP, uses no top lance at all, blowing oxygen, burnt-lime powder, and, when needed, argon upward through the liquid melt from several gas-cooled or oil-cooled bottom tuyeres. These tuyeres are two concentric steel tubes, with oxygen flowing from the inside annulus and gas or oil…
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