Skw Trostberg Aktiengesellschaft

Suddeutsche Kalkstickstoff-werke Aktiengesellschaft

Thyssen Stahl Ag

Thyssen Aktiengesellschaft Vorm. August Thyssen-hutte

Thyssen Aktiengesellschaft

August Thyssen-hutte Ag

Heinrich Rellermeyer

Walter Meichsner

Wolfgang Ullrich

Alfred Freissmuth

Heinrich Rock

Werner Kaas

Erich Pfluger

Raymund Sindermann

Horst Prietzel

Werner Gmohling

Rudolf Hammer

The invention relates to a process and an apparatus for preparing binder-free hot-briquets for smelting purposes from ferrous pyrophorous, finely divided solids, such as dry steelmaking-filter dust or slightly granular sponge iron from direct-reduction plants. Before the briquetting stage, oxidizing gas is blown at a temperature of more than 200.degree. C. through the finely divided dry solid containing more than 4% by weight of metallic resin. The flow rate of this gas is controlled in such a way that oxidation of some of the metallic iron raises the temperature of the finely divided solid to 450.degree. C. to 650.degree. C. This is followed by hot-briquetting.

Apparatus for preparing binder-free hot-briquets

A method and composition for desulfurization of hot metal is disclosed. To the hot metal there is added a composition comprising calcium carbide, a hydrogen releasing compound and magnesium.

Method, process and composition for desulfurizing pig-iron melts

The invention relates to a process and an apparatus for preparing binder-free hot-briquets for smelting purposes from ferrous pyrophorous, finely divided solids, such as dry steelmaking-filter dust or slightly granular sponge iron from direct-reduction plants. Before the briquetting stage, oxidizing gas is blown at a temperature of more than 200.degree. C. through the finely divided dry solid containing more than 4% by weight of metallic iron. The flow rate of this gas is controlled in such a way that oxidation of some of the metallic iron raises the temperature of the finely divided solid to 450.degree. to 650.degree. C. This is followed by hot-briquetting.

Process for preparing binder-free hot-briquets

A process is described and claimed for reducing the iron content of a CaO-rich slag which is formed during the desulphurization of molten crude iron which comprises adding finely-ground fluorspar to the melt, in the ladle, or adding it to the lade prior to adding the crude iron thereto, in an amount such that the slag is not rendered fluid.

Process for reducing the iron content of CaO-rich slags formed during

Molten metals, especially molten pig iron, are desulfurized by contacting them with a composition comprising calcium carbide or calcium cyanamide and an additive agent yielding water or hydrogen at the temperature of the molten metal; preferred as the additive agents are the alkali metal hydrides, polyethylene or polyamide for yielding hydrogen and hydrate of lime and alkaline earth borates for yielding water.

Method and composition for the desulfurization of molten metals

Residual slag incrustations containing calcium oxide are removed from a surface in the presence of which molten iron has been desulfurized by contacting said incrustations with a source of an oxide of boron.

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Duisburg, Germany

Heinrich Rellermeyer