Who Discovered Aluminum?
Aluminum is the most common element contained in the Earth’s crust, but it is never found naturally in its metallic form. Rather, aluminum is a compound of other elements.
In the early 19th century, Danish-chemist Hans Christian Oersted first extracted tiny amounts of the metal from ore. The complexity of this process led many to believe that aluminum was rarer than gold.
In the late 19th century, however, scientific breakthroughs led to very efficient and cost-effective ways of extracting the metal. Today, aluminum alloys are abundant and found in a variety of industrial and consumer products.
How is Aluminum Made?
Aluminum is produced through two methods: primary production and secondary production.
Aluminum production begins with extracting bauxite, an ore found in the topsoil in many tropical and subtropical regions of the world. Chemists then produce the chemical compound aluminum oxide, also known as alumina, from bauxite using a method known as the Bayer process.
Every two pounds of bauxite produces one pound of alumina. Through a process known as Hall-Heroult, aluminum producers smelt aluminum oxide and refine it into pure aluminum metal. Every two pounds of aluminum oxide produces one pound of aluminum.
Secondary production of aluminum involves recycling scrap aluminum into new aluminum. The process uses less energy than primary production and is more environmentally friendly.
Producers extract aluminum from waste streams and prepare to recycle it. Aluminum producers sort the scrap by its chemical properties. Scrap with one type of chemical composition has more value than scrap containing several alloys.
After sorting, aluminum refiners place the scrap into melting furnaces and turn it into molten aluminum. The molten aluminum can be cast into two types of large slabs – ingots and billets. Ingots can be rolled into sheet aluminum, while billets can be extruded into different shapes.
Where Does Aluminum Come From?
Global primary aluminum producers smelt about 60 million metric tons annually. Chinese primary producers account for more than half of the global supply of aluminum.
Top 10 Aluminum Producing CountriesA map of the world, illustrating Primary Aluminum Production by country.
|Rank||Flag||Country||Thousand Metric Tons|
|#5||United Arab Emirates||2,400|
|#9||United States of America||840|
Global demand for aluminum is concentrated in China where urbanization has created strong demand. China consumes about 40% of the global annual supply of aluminum. Japan, the European Union and the United States are the next largest consumers of the metal.
Aluminum is lightweight, recyclable and corrosion-resistant, which makes it ideal for numerous industrial uses. The following industries represent the largest consumers of the metal:
|Use of Aluminum||Description|
|Aerospace||Aluminum alloys are used in aircraft and rocket construction.|
|Aluminum cans||Manufacturers package sodas and other beverages in aluminum due to the metal’s ability to cool down quickly.|
|Automobiles||Hoods and other lightweight aluminum parts maintain fuel efficiency in cars.|
|Building and Construction||Aluminum is an energy-efficient and sustainable material. The vast majority of aluminum used in construction is from recycled materials.|
|Electrical||Aluminum is an excellent conductor of electricity and is used in electrical wiring.|
|Electronics and Appliances||Appliances including washing machines, refrigerators and laptops use aluminum.|
|Foil and Packaging||Medicine packets, candies and TV dinners are a small sample of the items that use foil packaging.|
|Miscellaneous||Solar panel nanotechnology and aluminum-air batteries are two new technologies that use aluminum.|
What Drives the Price of Aluminum?
Many global industries use aluminum in their products, so the price is a good barometer of the overall health of the world economy. These are the five most important factors that influence aluminum prices:
- Chinese Demand
- Transportation Demand
- Construction Industry Demand
- Input Costs
- The US dollar
China uses over 40% of the annual global supply of aluminum and, therefore, is the biggest driver of its price. Strong growth in Chinese GDP over the past two decades has pushed many industrial commodity prices higher.
Chinese companies have an increasing demand for aluminum in the packaging sector. Additionally, real estate, transportation and the electronics sectors have all seen growth in their demand for aluminum.
In the developed world, automobiles and aerospace are the most important markets for aluminum. The aluminum industry faces competition from lighter composite materials that seek to replace aluminum as a construction material. Carbon fiber materials, for example, account for a growing share of the aviation market. As composite materials make technological advances and become more affordable, demand for aluminum may wane.
Construction Industry Demand
The construction and building markets represent the second largest industrial demand for aluminum. In developing countries, aluminum accounts for about 30% of building materials. Construction growth rates can be volatile. Interest rates, unemployment and overall economic strength can affect demand and, in turn, influence the price of aluminum.
The costs of producing aluminum can have a meaningful impact on its price. Aluminum production uses large amounts of energy in the smelting process. Changes in the cost of oil or electricity ultimately feed into the price of aluminum. In the case of recycled aluminum, the cost of scrap metal can also have a direct impact on prices for the finished product.
The US dollar
The US currency is the world’s reserve currency and as a result, aluminum and other commodities are quoted in US dollars. Aluminum producers receive fewer dollars for their product when the US currency is strong and more dollars when the currency is weak.