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The Production Process Of 1100 Aluminum Coil

The preparation of aluminum ingots

The production process of 1100 aluminum coil is divided into two stages: first is the preparation of aluminum ingots, the second is the rolling and production.

First, prepare aluminum ingots

The first step is to produce an ingot. The ingot is a solid block of aluminum that has been cast from molten aluminum. The melting point of aluminum is 1221°C, so it must be heated to above this temperature before being poured into a mold or crucible to create an ingot. The mold used depends on the size and shape required; typically they are made from iron or steel but can also be made from various other materials such as graphite (for low pressure die casting).

Melting, casting and rolling

Aluminum is one of the most useful metals in the world, but it's not found in its pure form on Earth. To get aluminum, we have to extract it from its ore and then refine it into usable metal. That process starts with melting the ore, which is done at very high temperatures. Next, aluminum is cast into ingots called billets, which are large bars that are used in manufacturing. Finally, those billets are rolled into thin sheets called coils or sheets.


Aluminum is made by extracting aluminum oxide from bauxite ore. Bauxite is mined from open pit mines where the ore is crushed and separated into two component minerals: gibbsite (Al(OH)3), which contains about 70% aluminium oxide (Al2O3), and boehmite (γ-AlO(OH)), which contains about 85% Al(OH)3.

The mixture of gibbsite and boehmite is called alumina; this mixture can be produced into aluminum at temperatures above 2200 °C (4050 °F). The process of converting alumina into aluminum requires an oxidizing agent such as air or oxygen gas to convert the oxygen ions present on the surface of the mineral grains into water molecules and thus convert

Annealing and cold rolling

Annealing, tempering and cold rolling are the three main processes in the production of aluminum coils.

Annealing is a heat treatment process used to soften and relax the metal structure. The annealing temperature is lower than the tempering temperature. The purpose of annealing is to improve corrosion resistance and mechanical properties such as plasticity, elongation and tensile strength. After annealing, the coil surface will have a uniform color and smooth surface without any defects such as cracks or scratches.

The next process is tempering, which involves heating and cooling processes to improve mechanical properties such as hardness, toughness and impact strength. Tempering is mainly used for cold-rolled products. Before tempering, all products must be annealed firstly.

Annealing and hot rolling

1100 aluminum coil is a widely used product, which is not only strong and durable but also has good corrosion resistance. In order to make the product more competitive in the market, we need to know more about the production process of 1100 aluminum coil.

The first step is to anneal and hot rolling. The raw material is first annealed for about 1 hour at 480°C-510°C, which makes it softer and easier to roll. Then it goes into the hot rolling mill where it is rolled into a sheet as thin as 0.12 mm. The thickness of the foil depends on what kind of products we want to make out of it. After that, it goes through a cold rolling process where its thickness is reduced by 20%-30%. As mentioned above, this is done so that we can get thinner sheets and therefore make more useful products out of them later on in the process.



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