How to Melt Scrap Gold?
Gold is one of the most processed metals in the world. This metal, which is rare in nature, was previously used as a currency and for jewelry making. Nowadays, it is also used as a means of production in many fields from the communication industry to the medical field. This situation increases the demand for gold. At this point, gold extracted from primary mines is insufficient for the consumption of world countries. Secondary resources are also in demand as well as mines. So gold recycling.
Gold is really a special mine. One of the things that makes it valuable is that it is processed repeatedly without losing its value. Of course, when it comes to processing, melting is mentioned. During the cutting, melting, polishing, lining or wire drawing of the gold in the workshops, particles that are invisible to the eye but constitute an important economic value when combined, spread to the environment in powder form. In addition, the equipment, brushes, mats, shoes, and clothes of the employees in jewelry factories are never thrown away. Even the water in which the workers wash their hands is collected. These wastes are collected once or twice a year, and the gold that is melted at high temperatures in large boilers and decomposed is made suitable for reuse.
Gold is melted in special induction furnaces with temperatures over 1000 degrees. As it is known, the process of making objects fluid by losing their solid state with the help of any heat is called melting. Melting is one of the most common operations in the jewelery industry. In order to make some changes in the form of gold, there is a need to make an alloy. An alloy is a combination of two or more metals, usually melted together so that the constituent metals have better or more stable properties than the individual metals. After the gold is melted in these special furnaces, the molten material is slowly poured into the water and divided into small pebble-sized or popcorn-shaped granules to form smaller pieces or grains, and the melting process is completed.
Optionally, gold is produced as a bar by melting again. Special molds are required for the gold to be poured as ingots. These molds are also specially produced according to the amount of gold to be melted and turned into an ingot. It can be produced as ingots in 100g, 250g, 500g, 1kg, 2kg capacities in bar making machines. Molds are fed into the tunnel type furnace known as the continuous casting kilobar making series. The gold to be made into bars is weighed precisely and melted in the furnace to make ingots.