(Kiln | Oven) In a dream, a furnace means distress, burdens, trouble and suspicion. Seeing a limekiln in a dream means backbiting people of knowledge or religious scholars. As for a brick-kiln in a dream, it means oppression, injustice or polytheism. A furnace or a kiln in a dream also represents hell-fire and its people.
Read more about dreaming of Furnace in other dream meanings interpretations.