Often portable, Genesis 15:17. They were used for melting the precious metals, Proverbs 17:3. The furnace into which Daniel’s three friends were cast was large, and remained open after they were cast in, Daniel 3:1-30. The fearful punishment spoken of in Jeremiah 29:22 is still used in the East. The word furnace is used to illustrate a state of oppression, Deuteronomy 4:20, and of affliction, Isaiah 48:10.
These dictionary topics are from American Tract Society Bible Dictionary published in 1859. Public Domain, copy freely.
Rand, W. W. "Entry for 'FURNACES'". "American Tract Society Bible Dictionary".