6063 alloy is an alloy with Al-Mg-Si as the main element, each element has a certain content, and the price of magnesium is high. In order to reduce the cost, some manufacturers reduce the amount of magnesium to the minimum allowable content. Some even worse, the content of magnesium is lower than the minimum allowable content.

Other factories add waste wires and waste pots and waste aluminum pot to the alloy, which is basically far from 6063 alloy. As a result, the mechanical strength of aluminum profiles is very low, which can be so low that it is easy to bend with both hands, commonly known as "noodles". This is one of the reasons why aluminum profiles can be several thousand yuan cheaper.

Regular aluminum profile manufacturers have internal standards when preparing alloy components, that is, within the range of various elements, each factory has its own smaller variation range, and the ratio between aluminum, magnesium and silicon is very strict, and each factory has its own data and keeps it confidential.

Only the alloy made of qualified formula can guarantee the quality, otherwise, the quality will not be improved in the future.

Aluminium alloy smelting furnace

It is also very important how to melt the prepared 6063 alloy and what furnace to use. At present, the furnaces used in China are 40' s level and 90' s level, and the worst manufacturers use the original crucible furnace. There are coal-fired, oil-fired, gas-fired and electric-heated smelting furnaces.

Some stoves have chimneys, while others have no chimneys. Generally, most square furnaces (rectangular furnaces) are used, the advanced ones are round furnaces, and some round furnaces can pour aluminum water obliquely. On aluminum melting furnaces with tonnage of one ton, two tons, five tons, ten tons, twenty-five tons and fifty tons. More advanced, a static furnace is added below the aluminum melting furnace, which is important for preparing 6063 alloy. Slag can be removed and degassed in this furnace, and then aluminum bars can be cast for extrusion.

The quality of alloy prepared in the original coal-burning furnace is absolutely different from that in the modern circular furnace.

Generally, no matter what kind of fuel is burned, there should be a chimney, and most of the waste gas and waste residue produced during the combustion of fuel can be discharged from the chimney.

 Aluminum profile processing factory shares melting and casting processes.

The melting and casting process of aluminum profile processing factory is mainly to mix the alloy components of aluminum profile products, which is the key step to ensure the quality of aluminum profile products.

In the process of aluminum processing, the aluminum melting furnace needs to be heated to a higher temperature in order to melt aluminum ingots and other metal materials. Therefore, in the process of melting raw materials, impurity removal and purification, a large number of dusty gases will escape when the aluminum melting furnace is turned on. The pollutant composition of the dusty waste gas is mainly determined by the raw material composition added in the melting process. Aluminum ingot is the main raw material for aluminum profile production enterprises. In order to improve some special properties of products, a small amount of magnesium, silicon and rare earth elements are usually added to the aluminum melting furnace to adjust the composition. In addition, refining agent (containing cryolite Na3AlF6) and a small amount of inert gas are added to remove a small amount of H2 from aluminum melt.

Therefore, the dusty waste gas mainly contains metal particles such as aluminum and magnesium, fluoride and some rare earth elements. These pollutant particles are small, and some of them are produced in the form of aerosol. For some aluminum profile production enterprises with waste aluminum as the main raw material, because the surface of waste aluminum also contains substances such as nickel, tin, chromium and organic coatings, the process waste gas produced by aluminum melting furnaces and ash scrubbing furnaces in such enterprises also contains metals and organic substances such as nickel, tin and chromium, and the pollutant composition is more complicated. In order to effectively reduce the environmental pollution caused by the waste gas from the aluminum melting furnace, aluminum profile manufacturers generally set a gas collecting hood above the aluminum melting furnace and other equipment, and use a fan to introduce the dusty waste gas into a bag filter for dust removal.

For those aluminum profile manufacturers who use waste aluminum as the main raw material, it is an effective method to control the purity of waste aluminum into the furnace and minimize the impurity content in waste aluminum. The smoke and dust of aluminum melting furnace is characterized by fine and light dust, which will also cause air pollution when discharged into the atmosphere. Some harmful gases, liquids or certain metal elements can be adsorbed on the dust, which will be taken into the depths of the lungs or adhered to the tube wall of the bronchus with human breathing, causing or aggravating various diseases of the respiratory organs. In addition, the dust in the air will also reduce the visibility of the atmosphere, and the generated smoke can reduce the solar radiation energy reaching the earth's surface.

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