Product definition

The product covered here is a load-bearing device whose sole purpose is to collect molten or solid slag generated during metallurgical or chemical processes, to retain it during transport and to deposit it at a place of disposal.

Slag pots are crucial items as they are part of a lifting equipment and therefore undergo in terms of mechanical design engineering and handling the national safety regulations of the state where they are supposed to be operated. The design of the Dillinger slag pots intended to be used within the European Community meets the requirements ofthe European Machinery Directive 2006/42/EC: every slag pots is supplied with the CE conformity marking.

Material

The pots are made out of the cast-steel DICAST, trade name owned by CITICHL forcastings: this material is similar to the steels A27/A 27M grade 65-35: April 2003, BS 3100 A1/A2:January 1991 or GS 20Mn5 to DIN 17182: May 1992. DICAST is a fully killed steel, vacuum-degassedand processed to a fine grain size structure with improved properties both in toughness and in elongation.

Slag Pot Manufacturing Process：

Except the supply of the forgings for trunnions and the engineering of the pattern, all further operations are carried-out at the in-house foundry plant.

• Moulding

Sand moulding.

• Trunnions

The trunnions - when any - are preferably cast-in: they are as a rule manufactured from the steel material S355 J2G3 to DIN EN 10250-2.

• Melting

The melting is carried out in the oxygen steel plant; the ladle capacity allows a continuous bottom pouring process the speed of which is permanently controlled. The metal analysis is checked by using a computer linked spectrograph.

• Heat treatment

 Heating to a temperature above AR3, austenitising at about 915°C and controlled cooling in furnace

 Intermediate holding at 600°C - 630°C and completion of cooling in furnace down to 300°C

• Fettling and dressing

The inner surface is processed fit-for-purpose so that the surface discontinuities - which might cause some sticking of the slag - are extensively removed. Additionally, the castings are descaled by shotblasting and the outside is additionally coated for transportation.