In the field of gold ore smelting, although large-scale production usually uses more advanced smelting equipment, crucible furnaces still play an important role in laboratory or small-scale applications. This article will introduce how to use crucible furnaces to smelt gold ore in small-scale applications.

First of all, preparation is crucial. It is necessary to check the working condition of the crucible furnace to ensure that its heating elements, temperature control system, etc. are in good condition. At the same time, choosing a suitable crucible is also key. The material of the crucible should be able to withstand high temperatures and will not react chemically with the gold ore. In addition, the gold ore raw materials need to be pre-treated, such as crushing, refining, etc., for better smelting. If needed, the gold ore can also be mixed with other fluxes to improve smelting efficiency and gold recovery.

The next step is the smelting stage. Place the crucible in the crucible furnace and slowly increase the furnace temperature to bake the crucible to remove moisture and impurities. When the furnace temperature reaches the predetermined temperature (usually higher than the melting point of gold), start adding gold ore and other fluxes. During this process, you need to be careful to avoid splashing or causing danger. As the heating continues, the gold ore and flux will gradually melt. During the melting process, it may be necessary to stir the materials in the crucible appropriately to promote melting and reaction. At the same time, the oxidation reaction at high temperature will help separate other metal elements and impurities in the gold ore.

After the smelting is completed, it enters the cooling and extraction stage. Stop heating and let the crucible cool naturally, or quench it with water as needed. After cooling, the crucible can be opened and the smelted metal alloy can be taken out. According to the needs of subsequent treatment, pure gold can be further extracted by electrolysis, chemical leaching and other methods.

During the entire smelting process, safe operation is indispensable. Operators should strictly abide by safety regulations and wear necessary protective equipment, such as protective glasses, high temperature resistant gloves, etc. At the same time, waste gas, waste slag, etc. generated during the smelting process also need to be properly handled to meet environmental protection requirements.

In addition, the maintenance and maintenance of the crucible furnace is also an important part of ensuring the smelting effect. Regularly checking the working status of the crucible furnace and timely cleaning the residues in the furnace and crucible can extend the service life of the equipment and improve the smelting efficiency.

In summary, although the application of crucible furnaces in small-scale gold smelting is relatively limited, an efficient and safe smelting process can still be achieved through careful preparation, strict operation and proper maintenance.