Therefore the direct reason of shutdowns of the unit for dry quenching of coke for cold repairs of the lining is collapse of individual portions of the lining of the prechamber and the slanted passages.The time for relining of the collapsed portions of the lining is significant and the life of the lining repaired in routine repairs does not exceed two years. In connection with this at Novolipetsk Metallurgical Combine to prolong the service life of the most worn portion of the lining, the prechamber, wet guniting of a chamotte mixture with an applied layer thickness of 35-40 mm is used.