It sounds like aluminium plants are the same the world over.The way they charge and stir the furnaces is very old fashioned and very dangerous.Ive seen forklifts go up in flames from splash backs when charging furnaces.You can actually see the tires on the loading shovels evapourating [foam filled by the way] they get so hot.When a truck is stirring the furnace it can be subject to 1000 degree heat for anything up to 15 minuits.any truck will fail under these conditions