Криворізький Металургійний Комбінат "Криворіжсталь" Ім. В.І. Леніна
Криворожский металлургический комбинат «Криворожсталь» им. В. И. Ленина
Донецький Науково-Дослідний Інститут Чорної Металургії
Донецкий научно-исследовательский институт черной металлургии
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Priority to UA4489671ApriorityCriticalpatent/UA7566A1/en
Publication of UA7566A1publicationCriticalpatent/UA7566A1/en
Carbon Steel Or Casting Steel Manufacturing
(AREA)
Treatment Of Steel In Its Molten State
(AREA)
Abstract
A method includes introduction in the refining period of a slag of secondary aluminum production and lime. The slag of secondary aluminum production and lime are introduced in the form of a mixture by three portions. The first portion is introduced in the period of 10-30 % of refining duration at the mass ratio of slag and lime 1:(1-3) with consumption of slag in the mixture 4 kg/t. The second portion is introduced in the period of 30-50 % of refining duration at the mass ratio of slag and lime 1:(1-2) with consumption of slag 2 kg/t. The third portion is introduced in the end period of refining on at the mass ratio of slag and lime 1:(0.2-0.3) with consumption of slag 2 kg/t.
UA4489671A1988-10-041988-10-04Method for steel smelting
UA7566A1
(en)
Blast furnace apparatus using gas mixture blown into through tuyere thereof* consiting of pulverised coal mixed with fuel oil or reducing gas and additional desufurizing agent