QSL process
Quick Summary
The QSL (Queneau-Schuhmann-Lurgi) process is a direct smelting method used in metallurgy for lead processing. Unlike older methods that require pre-treatment of materials, QSL uses a reactor where oxygen and natural gas are blown into a molten bath. This process oxidizes the lead concentrates, producing flue gas and slag. The natural gas injection also creates carbon monoxide, which reduces metal oxides. This method is efficient as it doesn't require briquetting or drying of the charge, and it produces less gas and dust compared to traditional smelting.1
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metallurgyReduction smelting…lead sulfide concentrate are the QSL (Queneau-Schuhmann-Lurgi) and the KIVCET (a Russian acronym for “flash-cyclone-oxygen-electric smelting”). In the QSL reactor a submerged injection of shielded oxygen oxidizes lead sulfide to lead metal, while the KIVCET is a type of flash-smelting furnace in which fine, dried lead sulfide concentrate combines with…
Read More…lead sulfide concentrate are the QSL (Queneau-Schuhmann-Lurgi) and the KIVCET (a Russian acronym for “flash-cyclone-oxygen-electric smelting”). In the QSL reactor a submerged injection of shielded oxygen oxidizes lead sulfide to lead metal, while the KIVCET is a type of flash-smelting furnace in which fine, dried lead sulfide concentrate combines with…
Read More- lead processingDirect smelting
The QSL, or Queneau-Schuhmann-Lurgi, process treats all grades of lead concentrates, including chemically complex secondary minerals, in a refractory-lined reactor into which oxygen and natural gas are blown through tuyeres at the bottom. The “green,” or unroasted, charge is first oxidized in a molten bath by…
Read MoreThe QSL, or Queneau-Schuhmann-Lurgi, process treats all grades of lead concentrates, including chemically complex secondary minerals, in a refractory-lined reactor into which oxygen and natural gas are blown through tuyeres at the bottom. The “green,” or unroasted, charge is first oxidized in a molten bath by…
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