DE1067983B - - Google Patents

Description

GERMAN

Transport ladles for steel or pig iron, which usually have an acidic, refractory lining, have to get a new lining from time to time due to the wear and tear of the lining. The used one The pan is then left to cool, whereupon the worn lining is broken off and is replaced by a new liner.

Attempts to patch up the largely cooled pan with sticky sand were unsuccessful and could not prevail because the sand did not hold at the patched areas.

It is also known to inject pouring ladles with a mass of chamotte and clay, the The inside of the pan, previously hosed down with water, has been cleaned of slag and metal deposits. That The sprayed mass was partly dried by the pan's own heat and partly by the pan Part through suitable pan drying devices. Corresponding experiments with adhesive sand do not lead to success.

The invention shows a way of permanently patching or replacing pan linings with adhesive sand.

According to the invention, when moving out of acid-lined transport pans in the warm state proceed by spraying on with adhesive sand so that the inherent heat to about 100 ° C, more expedient Above 100 ° C, hot pan splashed with adhesive sand mortar in its damaged areas and doing so the spray layer is only dried by the heat of the pan alone. It is enough here As a rule, the pan uses its own heat in order to dry the entire layer that has been applied. That closes does not mean that occasionally individual areas of the applied layers are kept warm for a very short time be e.g. B. by a gas burner.

The necessary internal heat of around 100 ° C, more expediently over 100 ° C, is conveyed to the pan, by letting them cool down to these temperatures after the last use, or it the pan or the lining or only the localized area to be patched up on the mentioned Temperatures are heated.

This temperature setting on the inner pan wall ensures that the water contained in the adhesive sand mortar evaporates for a very short time and the mortar on the existing base is a good method for patching up
of sourly lined transport pans
in a warm state by spraying out
with sticky sand

Applicant:

Dortmund-Hörder Hüttenunion

Stock corporation,
Dortmund, Rheinische Str. 173

Gustav Drape, end via Herdecke / Ruhr, and Wilhelm Lueg, Dortmund-Hörde, have been named as inventors

adheres. The failure of the previously known patching attempts by smearing with adhesive sand in the cold The condition is apparently based on the fact that the water vapor that forms during drying or heating destroyed the patches again.

A little sulphite waste liquor is expediently added to the mixing water for the adhesive sand mortar, e.g. B. 1 part Sulphite waste liquor to 20 parts of mixing water.

Claims (1)

Claim: Procedure for disengaging acid-lined transport pans when they are warm Spraying with adhesive sand, characterized in that the inherent heat to about 100 ° C, expediently over 100 ° C, kept warm pan in its damaged areas with adhesive sand mortar, whose mixing water expediently some sulphite waste liquor, z. B. 1 part sulphite liquor to 20 parts Mixing water, contains, is sprayed out and the spray layer is only created by its own heat the pan is dried on its own. Considered publications:
Journal »Stahl und Eisen«, 1926, pp. 13 to 16.