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Pengecoran Aluminium | Smelting Aluminium Foil Packaging Ex Drug and Instant Beverages

Trash ex instant beverage packaging with other plastic waste is often the cause of flooding due to blockage of the flow of water . Among the former garbage instant beverage packaging that contains no aluminum foil ( a thin layer inside the wrap ) and can be recycled for free through the element aluminum smelting way . Aluminum element in packs of instant beverages including former drug packaging collected as marketable.
The plastic waste collection efforts in addition to utilizing aluminum as a material useful in order not to waste reduction efforts are of great help due to the flood of plastic waste that often clog drains . ( cara pengecoran aluminium )
Aluminum is a metal that is widely used in various purposes such as to coat the aircraft body , for home furnishings , for canned drinks because it can provide good mechanical strength , corrosion resistant , and has a good cast - able .
pengecoran aluminium
pengecoran aluminium
Technology melting process can be done in a conventional manner with a technology that is simple yet effective in obtaining aluminum bars .
The materials needed in this recycling process includes primary material and support material . The main ingredient is a material consisting of trash packs of instant beverage or drug packs containing aluminum foil and if there is a plus anfalan ( junkyard ) such as beverage cans , pieces of aluminum plate or pipe .
Supporting material in the form of greyhon , required at the time of a fire .
The tool consists of a smelting furnace melting inside a drum coated refractory bricks , iron stirrer for leveling flame , ladle to pour the liquid aluminum and steel molds to freeze the liquid aluminum .
The furnace includes all equipment that is still underdeveloped deliberately created to save production costs . Furnaces are used this fruit amounted to 9 maximum when operated will produce 10 aluminum rod or if the raw material is good enough to produce aluminum metal ± 1 quintal per day .
In the smelting process , initially aluminum foil packaging waste that is gradually incorporated approximately 50 % of the capacity of the furnace . Next enter greyhon ( fuel ) that is wrapped with grenjeng ( cigarette tin foil ) and lit the fire . When the fire starts to burn greyhon continuously added to the enlarged fire .
After that all the main ingredients and anfalan ( junkyard ) aluminum inserted until the furnace is full . Wrap aluminum foil continuously stirred and pressed to help speed up the melting .
If there has been a melting aluminum metal then impurities that float in the form of discarded wear ladle slag . Aluminum pouring molten metal into a steel mold was also performed using a ladle . Freezing with liquid metal open air until it is cool and safe to handle lasts for 10-12 hours . After a while the molten metal solidifies ( called castings ) are then removed from the mold . Castings are then prepared for analysis using a microscope optical microstructure or hardness tested using a micro hardness tester .
Quality of the aluminum smelting process can be determined by analyzing the microstructure is through metallographic techniques or microscopy . A state of the microstructure , in this case the grain size ( grain size ) affects the mechanical properties of the metal . Metallographic workmanship on metal castings will show microstructures that help qualitative and quantitative interpretation .
Stages of the work carried out to analyze the microstructure of metals such as aluminum alloy castings include sampling - cutting sectioning ( sampling ) , coarse grinding ( coarse grinding ) , mounting ( planting ) , fine grinding ( fine tuning ) , rough polishing ( polishing rough ) , final polishing , Aluminum castings subsequently etched with a reagent of chemical mixtures such as: 10 mL HCl + 30 mL HN03 + 5 g FeCl3 + 20 ml H2O .
Some common methods of etching include optical methods , electrochemical ( chemical ) , and physics . Etching by chemical methods would most practical and done in this experiment . In the technique of etching solution reacts with the surface etcher footage without using electric current . This method of etching events taking place by the presence of selective dissolution in accordance with the electrochemical characteristics possessed by each material surface area . During etching , positive ions leaving the surface of the metal material and then diffuse into the electrolyte test equivalent to the number of electrons contained in these materials .
In the etching process directly , if the metal ions leave the surface of the material and react with non- metal ions in the electrolyte to form insoluble compounds , then a layer of precipitation will form attached to the surface of materials with different types of thickness . The thickness of this layer as a function of composition and microstructure orientation is separated into a solution . This layer can display interference patterns caused by variations in color and thickness of the layer is determined by the microstructure of the metal that is underneath .
Footage which is part of the pieces of aluminum castings results observed with Optical Microscopy and do a photo shoot . Observations on the picture of microstructures , generally showed the presence of the parent matrix form brightly colored and dark colored particles that lead kebatas grains . The number of particles on the dark colored objects cast result generally depends on the speed of the cooling rate . The faster the cooling rate , the rate of grain growth will be lower than the nucleation rate , so that the grains to expect ¬ silkan be refined so that the hardness and tensile strength will be high .
Based on the metallographic technical experience to get the look of contrasting metallic surfaces , especially between grain boundaries , the decisive factor is the skill of the technician in principle in the preparation of samples ranging from sampling to polishing . Furthermore , at the time of etching the factors that determine the success formula is knowledge in choosing the right method of etching follows . Another factor that is also important is the ability to apply the setting light microscopy techniques and mainly focus image between the metal grain boundaries .
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