Siemens Vai Metals Technologies Gmbh

Siemens Aktiengesellschaft

Primetals Technologies Austria Gmbh

Marinko Lekic-Ninic

Stefan Lechner

Johannes Leopold Schenk

Johann Wurm

Kurt Wieder

Jan-Friedemann Plaul

Franz Wimmer

Martin Schmidt

Heinrich Thoene

Bogdan Vuletic

Georg Aichinger

Franz Berner

Johann Poeppl

Guoxin Shan

Thomas Söntgen

Karl Trnka

Karl Tmka

A roll () for supporting and conveying hot material, including a roll element that has a roll jacket () made of a basic material and a wear coat which is applied to the basic material by means of a surface welding process () using a welding additive which surrounds the surface of the roll jacket. In order to increase the service life of the wear coat, improve the resistance to wear, and reduce the cost for producing the welded-on surface. The basic material of the roll jacket () is steel and contains up to 0.45 percent of C. The welded-on surface () is designed as a single-layer weld, and the wear coat contains 12.5 to 14.0 percent of Cr at least in an external zone that surrounds the surface of the roll jacket. Also disclosed are a method for producing the roll (), a method for repairing a used roll (), a welding additive and a welding rod for producing the welded-on surface.

Process for producing a roll for supporting and conveying hot material, process for repairing a worn roll

A composition used for coating machine parts used in the production of pig iron or steel may include aluminum nitride (AlN) in a proportion of from 10% by weight to 40% by weight, one or more metal-oxidic substances in a proportion of from &#x2267;2 to 10% by weight, of which at least one comes from the group consisting of aluminum oxide, zirconium oxide, and LD converter dust, and an inorganic binder in a proportion of up to 70% by weight, where the % by weight are based on the total weight of the composition. A suspension based on the composition, and the use of the composition or the composition suspension for coating machine parts used in the production of pig iron or steel, are also disclosed.

Coating for machine parts used in the production of pig iron or steel

An injector insert pipe is arranged in the gas channel of a nozzle for injecting oxygen-containing gas into a pig iron production unit, wherein an interspace which surrounds the pipe is present over the entire pipe length between the wall of the gas channel and the pipe outer wall. The pipe extends at least as far as the nozzle end face which contains the mouth of the gas channel. The pipe space is connected to an oxygen-containing gas feed line, and the interspace is connected to a protective gas supply line. In a process, oxygen-containing gas is fed into the pipe space, which after it has flowed through the pipe, enters the production unit at an entry velocity, and the interspace is simultaneously flowed through by a gas which exits into the production unit at an exit velocity, wherein the entry velocity is greater than the exit velocity.

Nozzle for injecting gas containing oxygen into a pig iron device having an injector insertion pipe

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Linz, Austria

Marinko Lekic-Ninic