Furnace. Various kinds of furnaces are noticed in the Bible, such as...
a smelting or calcining furnace, Genesis 19:28; Exodus 9:8; Exodus 9:10; Exodus 19:18,
especially a lime-kiln, Isaiah 33:12; Amos 2:1,
a refining furnace, Proverbs 17:3,
Nebuchadnezzar's furnace, a large furnace built like a brick-kiln, Daniel 3:22-23, with two openings one at the top for putting in the materials, and another below for removing them;
the potter's furnace, Sirach 27:5;
the blacksmith's furnace. Sirach 38:28.
The Persians were in the habit of using the furnace as a means of inflicting punishment. Daniel 3:22-23; Jeremiah 29:22.