Hasung is a Professional Precious Metals Casting And Melting Machines Manufacturer since 2019.
Language
Hasung is a Professional Precious Metals Casting And Melting Machines Manufacturer since 2019.
In many industries such as metalworking and jewelry manufacturing, the melting machine plays a crucial role. Due to their unique physical and chemical properties, different metals exhibit significant differences when melted through a melting machine. Understanding these differences is of great significance for optimizing smelting processes, improving production efficiency, and enhancing product quality.
1.Overview of Common Melting Metal Characteristics
（1） Gold
Gold is a metal with good ductility and chemical stability, with a relatively high melting point of 1064.43 ℃. Gold has a golden color and soft texture, and is widely used in high-end fields such as jewelry and electronics. Due to its high value, strict requirements are placed on purity and loss control during the smelting process.
（2） Silver
The melting point of silver is 961.78 ℃, slightly lower than that of gold. It has excellent conductivity and thermal conductivity, and is widely used in industry and jewelry manufacturing. Silver has relatively active chemical properties and is more prone to react with oxygen in the air during the smelting process, forming oxides.
（3） Copper
The melting point of copper is about 1083.4 ℃, and it has good conductivity, thermal conductivity, and mechanical properties. It is widely used in fields such as electrical industry, mechanical manufacturing, and construction. Copper is prone to absorbing gases such as hydrogen during melting, which affects the quality of castings.
（4） Aluminum alloy
Aluminum alloy is the most widely used type of non-ferrous metal structural material in industry, with a melting point typically between 550 ℃ and 650 ℃, which varies depending on the alloy composition. Aluminum alloy has low density, but high strength and good corrosion resistance. The melting process requires strict control of the proportion of alloy elements and the melting temperature.
2.The working principle and technical parameters of the melting machine and their influence on melting
Melting machines usually use the principle of electromagnetic induction to generate induced current in metal materials through an alternating magnetic field. The Joule heat generated by the current rapidly heats up and melts the metal. The technical parameters such as power and frequency of the melting machine play a key role in the melting effect of different metals.
（1） Power
The higher the power, the more heat the melting machine generates per unit time, and the faster the metal heats up, which can improve the melting efficiency. For metals such as gold and copper with high melting points, a high-power melting machine is required to achieve rapid melting. However, for aluminum alloys with lower melting points, excessive power may cause local overheating, affecting the uniformity of alloy composition.
（2） Frequency
Frequency mainly affects the penetration depth of current in metals. High frequency melting machines are suitable for melting small-sized, thin-walled metal products or situations that require extremely high melting speed, because high-frequency currents are concentrated on the metal surface and can quickly heat the metal surface. The current penetration depth of low-frequency melting machines is greater, making them more suitable for melting larger sized metal ingots. For example, when melting large pieces of gold, reducing the frequency appropriately can distribute heat more evenly within the metal, reducing surface overheating and oxidation.
3.The performance differences of gold melting machines in the melting of different metals
（1） Melting speed
Due to its high melting point, gold has a relatively slow melting rate under the same power and conditions. Aluminum alloy has a low melting point and can quickly reach the melting temperature in a melting machine, with a melting speed significantly faster than gold. The smelting speed of silver and copper is between the two, depending on the power of the melting machine and the initial state of the metal.
（2） Purity control
In gold smelting, due to its high value, extremely high purity is required. High quality gold melting machines can effectively reduce the mixing of impurities and ensure the purity of gold through precise temperature control and electromagnetic stirring function. In contrast, silver is prone to oxidation during the smelting process. Although gold melting machines can reduce oxidation by filling inert gases into the smelting chamber, it is still more difficult to control purity than gold. The problem of gas absorption during copper smelting is particularly prominent, and degassing measures need to be taken to ensure purity, otherwise it will affect the mechanical properties of the castings. When aluminum alloy is melted, in addition to controlling the burning loss of alloy elements to ensure accurate composition, it is also necessary to prevent gas absorption and slag inclusion, and the requirements for melting equipment and processes are also very strict.
（3） Energy consumption
Generally speaking, metals with higher melting points consume more energy during the melting process. Due to their high melting points, gold and copper require a continuous supply of heat from a melting machine during melting, resulting in relatively high energy consumption. And aluminum alloy has a low melting point, requiring less energy to reach the melting state, and also has lower energy consumption. The energy consumption of silver is at an intermediate level. But the actual energy consumption is also related to factors such as the efficiency of the melting machine and the amount of melting. Efficient and energy-saving melting machines play an important role in reducing energy consumption during the melting of different metals.
（4） Equipment wear and tear
The losses of the melting machine also vary when melting different metals. Gold has a soft texture and causes minimal wear on the crucible and other components of the melting machine. Copper has a higher hardness, which causes relatively greater erosion and wear on the crucible during the melting process, requiring more durable crucible materials. When aluminum alloy is melted, due to its active chemical properties, it may undergo certain chemical reactions with the crucible material, accelerating crucible wear. Therefore, it is necessary to choose a specialized corrosion-resistant crucible.
4.Conclusion
The performance of the melting machine varies significantly in the melting of different metals, involving multiple aspects such as melting speed, purity control, energy consumption, and equipment loss. These differences mainly stem from the physical and chemical properties of different metals and the technical parameters of the melting machine itself. In practical applications, enterprises and practitioners should choose the type and working parameters of the melting machine reasonably according to the type and specific needs of the melted metal, and develop corresponding melting processes to achieve efficient, high-quality, and low-cost metal melting processes. With the continuous advancement of technology, the melting machine technology is also constantly innovating and developing. In the future, it is expected to further optimize the melting effect of different metals and meet the growing demand for metal processing in more fields.
Shenzhen Hasung Precious Metals Equipment Technology Co., Ltd. is a mechanical engineering company located in the south of China, in the beautiful and the most fastest economic growing city, Shenzhen. The company is a technological leader in the area of heating and casting equipment for the precious metals and new materials industry.
Our strong knowledge in vacuum casting technology further enables us to serve industrial customers to cast high-alloyed steel, high vacuum required platinum-rhodium alloy, gold and silver, etc.
