Production
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Mining

First bauxite extraction process was carried out at the mine. In Indonesia, there are three areas that produce the most alumi- nium, namely North Sumatra, Papua and West Papua.

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Aluminium Production

Aluminium as the most abundant metal on earth is commonly found in bauxite from the nature. Aluminium production started with bauxite mining, then refining to get aluminium oxide or alumina - white powder which is the element to produce the pure Aluminium. Processing 2 tons of bauxites can produce 1 ton of alumina (2:1 as the ratio).

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Refining

Bauxite as a natural mineral has impurity elements, so it is necessary to purify it to obtain alumina or aluminium oxide through the Bayer process.

Smelting

Then proceed with the second stage of purification with the Hall-Heroult process, namely smelting aluminium oxide to produce pure aluminium.

Fabrication

The pure aluminium is then fabricated into blocks (aluminium ingots) before finally being molded into industrial forms that are ready to be processed.

Casting & Rolling

Aluminum ingots are processed into a form that will be processed according to needs. In general, there are three types, namely aluminium billet, aluminium sheet, and aluminium coil.

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Aluminium Rolling

After being molded into ingots, aluminium processing is generally divided into two types, namely rolling (milled) and extrusion (pushed). In the milling process itself, the main objective is to produce thin aluminum products in the form of aluminium sheets  or aluminium plate.

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Rolling

Milling or rolling is a metal processing process with one or more rolls to reduce thickness and produce uniform thickness.

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Process

Aluminium ingots are melted and molded into 9 meter aluminum blocks. Then a rolling process is performed which produces a roll of up to 2 kilometers. There are two types of milling, namely hot rolling and cold rolling.

Hot Rolling

Hot rolling grinds at a temperature above the recrystallization temperature of Aluminium. Hot rolling is the process most often used in tons scale industrial metal processing.

Cold Rolling

Meanwhile, cold rolling grinding at a temperature below the recrystallization temperature of aluminum which aims to increase the density of the material so that it becomes stronger.

Products

The milling process produces thin aluminum products to form sheets and plates as coatings on building materials, printing, printing, and signage boards.

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Aluminium Extrusion

After it is molded into ingots, aluminum processing is generally divided into two types, namely rolling (milled) and extrusion (pushed). In the extrusion process itself has the main objective to produce longitudinal aluminium products in the form of aluminium profiles.

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Extrusion

Extrusion is a common processing process for aluminum. The process uses a propulsion system to produce elongated products in accordance with the mold.

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Process

Aluminium billets are cut per

1 meter and then pushed (extruded) through the die to create desired profiles with approximately 6 meters length.

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Dies

Dies or molds are key in producing aluminum extrusion products. Billets, or aluminum cylinders are cut per 1 meter, then heated and pushed through a die to produce an accurate profile.

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Products

The extrusion process of aluminum billets produces an elongated aluminum product in the form of a profile and a hollow which is used in many industries such as automotive, construction, machinery and electronics.

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Profiles

The dies work as the accurate cross section of aluminium profiles created from the extrusion process.

Aluminium Profiles Production