Smelting Furnaces

Induction Smelting Furnaces

Smelting process for silver and gold precipitate in Induction Furnace

Smelting gold and silver is an important procedure. Once gold and silver precipitate is smelted, gold and silver ingots can be recovered. These Silver and gold ore – precipitate (concentrate) is the product of Merrill-Crowe process or other similar process. The smelting process involves the use of an induction smelting furnace.

Let’s look at the steps involved in the gold and silver smelting process:

Induction smelting furnace

    • Preparing Flux

The first step involves a chemical called flux. The most common form of flux used in gold and silver smelting is Borax, Sodium Nitrate and Silica. The percentage of these fluxes varies and It depends on the composition of the precipitate. These fluxes are mixed with gold and silver concentrate. Using flux is necessary as it brings the impurities to the surface. The gold and silver settles down and can easily be removed. This is a simple but tedious process.

get free quote

    • Melting Gold and Flux in Induction Furnace

When the mixture of gold and flux are placed in the induction furnace, both materials melt in the furnace. The furnace is heated to high temperatures exceeding 900oC. It takes a while for the entire mixture to liquefy. After the mixture melts, the precious metals and impurities separate. This is the aim of the entire procedure. Gold and silver are denser than most impurities in it. This allows the gold and silver to settle down. The flux and other impurities rise to the surface.

Smelting Furnaces

    • Separating Gold and Silver from Flux

In the smelting process, the most important aspect is separating the impurities and flux from the gold and silver. Gold and silver normally settles towards the bottom of the furnace. This makes it easy to drain the impurities that have risen to the top. Carefully, the impurities are drained from the furnace. This leaves gold and silver at the bottom of the furnace. Once the purified gold and silver are left in the furnace, it can be poured into molds. When pouring the precious metals into a mold, metal test sample can be taken using vacuum tube.

These gold and silver ingots are not in pure gold and silver form. They contain other metals like Copper, Lead, Zinc and Fe. Percentages of these metals are less in comparison to gold and silver. These ingots will send to refinery for further purification.

Videos

Recent posts

  • Induction Furnaces Help Silver Mining Companies

    The mining industry is one of the most energy-intensive manufacturing sectors. Furnaces are widely used across the world in different mining companies for the successful smelting of Gold and Silver metals. Induction furnaces are capable of saving energy in smelting processes when compared to other traditional furnaces. However, heat loss is a factor that mining […]

  • How Induction Furnaces Help Gold Mining Companies

    Induction furnaces are an advanced version of the Electric furnaces. These furnaces have the ability to melt large amount metals without any trouble. This furnace save melting time compare to a traditional furnace. They also have the ability to build up heat, allowing the furnace to reach higher heat levels. This makes it perfect for […]