What is molten sulfer used for?

Answer 1

Molten is usually how sulfur is transported. Sulfur probably needs to be in the molten state for many of the chemical applications it is used for, such as the making of matchheads, etc. Sulfur in it's solid state (but pulverized) is used in the making of gunpowder and fireworks. Out in the oilfield where I work, molten sulfur is sometimes used to set bolts into concrete, as it sets up very hard and durable.