Manufacture

The manufacture of aluminum consists of single ingots, casting alloys, and high purity aluminum.

The most common manufacturing for the original aluminum extrusion, rolling and casting.

Aluminum can be extruded and molded into various tubes and shapes.

Aluminum is heated to 500 degrees Celsius and extruded through molding tools (similar to tubes of toothpaste) to produce products of all shapes.

Aluminum is gradually replacing copper as the preferred metal tubing for use in heat exchangers and air conditioners. There is no shape, aluminum can not be squeezed out.

Extrusion process emissions

After extrusion, some parts are cooled and hardened, and then some require surface treatment. Surface treatment can lead to emissions. Electrolytic baths extrude an additional protective layer of aluminum containing compounds. Wastewater discharged from the bath can be minimized by selecting suitable coatings, cleaning air and water discharges.

rolling

Aluminum can be treated in a cold and hot condition.

Aluminum is ductile. It can roll from 60 cm to 2-6 mm. Finally, foil products can be as thin as 0.006 millimeters, and are still completely impermeable to odor or odor.

The metal itself forms a protective oxide coating and is highly resistant to corrosion. Various types of surface treatments can further improve these properties.

Discharge from rolling process

Various rolling processes are added to ensure good surface finish and control temperature and temperature resulting from rolling into the oil and air.

When coating, strip, solvent paint is released into the drying furnace. Research and development projects have begun to reduce solvent coatings and use coatings, with less environmental impact.

casting

When a small amount of other metal is added to the aluminum alloy, the properties of the aluminum change.

These can give greater strength, brightness, and ductility, depending on the metal used to add. They can make aluminum easier to form a wide variety of products.

The most common alloys for aluminum are copper, magnesium and silicon.

To improve the quality, grain refinement is performed by adding a small amount of the material to strontium, sodium, and boride titanium / titanium.

The four main casting methods are:

Sand casting

Low pressure die casting

Die casting

High pressure die casting

The original castings usually require the machine to be finished and often coated.

Emission due to casting

Generally speaking, the use of permanent mold smelting and casting has no negative impact on the environment. When casting sand molds and organic compound molds, it is necessary to clean, discharge and ensure that limits are discharged to air and water without exceeding the standard. When it comes to paint, the emission of the casting is the same as that of the rolled material.