Magnesium Refining with Molten Salt
The refining process of magnesium has been around since the late 19th century and is used in a variety of applications. One of the more popular methods of refining magnesium is through the use of molten salt. The molten salt process is cost effective, efficient, and safe compared to other methods.
Molten salt refineries are essentially closed forges where magnesium is melted and then able to be worked and molded in a controlled environment. The process first starts by having the magnesium in “magnesia blocks”. These blocks are heated in a furnace and then added to the molten salt in the forge. The heat and the salt combine to refine and purify the magnesium in the blocks. The molten metal is then poured into molds to form whatever shape or size is necessary for the application.
Before being added to the molten salt, there are several treatments the metal must undergo. The blocks are first inspected for flaws and impurities, then cleaned and melted at the proper temperature. In addition, the forge must be maintained at the optimal temperature to ensure that the melt has the correct properties. The other factor is the choice of salt used. Different salts impart different characteristics to the metal, so care must be taken to choose the proper salt in order to achieve the desired result.
Once the magnesium is in the molten salt, the refining process begins. The heat and salt combine to purify and refine the metal, and any impurities or imperfections are eliminated. The molten metal is then poured into molds and allowed to cool and solidify. Once cooled and hardened, the metal is then ready for use.
Molten salt refineries are one of the most cost effective and efficient methods of refining and purifying magnesium, and are used in a wide variety of applications. The fact that it is a closed system also makes it very safe and a preferred choice over other refining methods. With proper care, the molten salt refinery can produce a quality product at an affordable price.
