Molten iron, molten ice, molten rock and other expressions once made everyone confused, and now on this hardness problem we carry out "melting" analysis:
1.molten adj. Melting; Molten
The term is only used for "melting" hard solids, or solids that melt at higher temperatures, such as metal, rock, or glass
The molten metal is poured into the mould.
Pour the molten metal into the casting mold.
An immense volume of rocks and molten lava was erupted.
Large amounts of rock and lava erupted.
The volcano spewed a fountain of molten rock 650 feet in the air.
The volcano spews out magma up to 650 feet tall.
The ground had opened to disgorge a boiling stream of molten lava.
The earth cracked and hot lava gushed out.
Sparks of molten steel dash in all directions.
Steel flowers burst out.
molten iron molten iron
Molten glass melted glass, glass water
Molten candler melted candle
Molten wax molten wax, English FAQs Dictionary, p852.
2. So the question arises, what to say about the less hard or softer solids that want to express "melting"? melted, is the past formula of melt, the past participle; can be used to modify the kind of solid that is not too hard or soft, such as:
Melted ice Melted ice
Melted snow melts snow
Melted butter melted cream
Melted wax melted wax
The river has swollen with melted snow.
Snow melts and the river rises.
Melted wax dribbled down the side of the candle.
Drops of melted wax flowed down the edge of the candle.
Oxford Advanced English-Chinese Dictionary
Pour the melted butter into a large mixing bowl.
Pour the melted butter into a large stir-up bowl.
Add the melted butter, molasses, salt, and flour.
Add the melted butter, syrup, salt and flour.
The recipe calls for oodles of melted chocolate.
This recipe uses a lot of melted chocolate.
I smelled tarry melted asphalt.
I smelled the tar melting.