\nPor lo tanto, todos los pa\u00edses del mundo conceden gran importancia a la purificaci\u00f3n del aluminio fundido.<\/strong>
\nThere are many reasons for aluminum pollution. On the one hand, during the melting process, aluminum is exposed to the furnace atmosphere in a molten or semi-molten state, which is prone to oxidation, easily reacts with water vapor to absorb hydrogen, and easily forms various forms of non-metallic slag. And coarse intermetallic particles and the like.<\/strong>
\nOn the other hand, part of the waste material in the composition charge carries some non-aluminum impurities during the circulation.<\/strong>
\nSince the waste comes from the process waste and waste of the various processes of the factory and the waste outside the factory, the route is different, the composition is complex, and the quality is also poor.<\/strong>
\nEstas impurezas tienden a provocar la formaci\u00f3n de burbujas e inclusiones en la plancha, lo que afecta gravemente a la pureza del metal fundido y, por consiguiente, repercute negativamente en las propiedades de procesamiento, las propiedades mec\u00e1nicas, la resistencia a la corrosi\u00f3n y la calidad est\u00e9tica del producto.<\/strong><\/p>\n
Filters used in foundry Aluminium can effectively remove all kinds of fineness in the aluminum water to micron-sized inclusions, making the aluminum water into a smooth laminar flow, which is good for filling.<\/strong> 1. Correct selection of filter plates<\/strong> ADTECH is one pioneer followed by the International Enterprise, which keeps focusing on the manufacture of metallurgical materials.
\nPresenta una buena resistencia mec\u00e1nica y estabilidad qu\u00edmica, as\u00ed como una excelente capacidad de lavado del aluminio.<\/strong>
\nTama\u00f1o de los poros y proporci\u00f3n de poros pasantes estrictamente controlados para garantizar una filtraci\u00f3n estable.<\/strong>
\nThe Filters used in the foundry are surrounded by a sealed heat-expandable ceramic fiber gasket, which helps the filtro de espuma cer\u00e1mica<\/a> to seal in the caja de filtro<\/a>, ensuring no metal liquid bypass.<\/strong><\/p>\n![\"Filtros](\"http:\/\/www.adtechamm.com\/wp-content\/uploads\/2019\/04\/Filters-used-in-foundry-1.jpg\")
<\/p>\nEn cuanto a su instalaci\u00f3n y uso, en general, hay que tener en cuenta los siguientes aspectos<\/h2>\n
\nEl tama\u00f1o de la placa filtrante y el n\u00famero de orificios deben seleccionarse teniendo en cuenta el rango de caudal del tipo de fundici\u00f3n concreto, el nivel m\u00e1ximo del metal l\u00edquido durante la filtraci\u00f3n, el volumen total de filtraci\u00f3n y el grado de limpieza del aluminio l\u00edquido original.<\/strong>
\n2. Pre-filtration treatment can not be ignored<\/strong>
\nSuch as molten aluminum furnace and holding furnace, normal slag, cleaning furnace, and furnace refining. In particular, an in-line degassing device is still necessary because it not only reduces the hydrogen content of the melt, but also removes some of the non-metallic inclusions.<\/strong>
\n3. The filter plate must be adapted to the square refractory filter box<\/strong>
\nThe two are adapted to seal, to prevent the metal from flowing into the casting box from the gap without being filtered, and also to avoid the failure of the foam filter plate to float in the aluminum water due to the excessive light weight.<\/strong>
\n4. Preheating before use<\/strong>
\nPrecalentar para eliminar la humedad y facilitar la filtraci\u00f3n transitoria inicial. El precalentamiento puede realizarse mediante calefacci\u00f3n el\u00e9ctrica o de gas. En circunstancias normales, tarda unos 15 minutos.<\/strong>
\n5. Durante la filtraci\u00f3n normal, no es necesario a\u00f1adir escoria para evitar golpes y vibraciones en la placa filtrante. Al mismo tiempo, el canal de vertido debe llenarse con fundici\u00f3n de aluminio para evitar una agitaci\u00f3n excesiva de la misma.<\/strong>
\n6. Tras la colada, vac\u00ede el metal de la celda de flujo y de la placa filtrante. Existe un vibrador, de fabricaci\u00f3n extranjera, que se coloca sobre la placa filtrante y se agita durante un minuto para eliminar aproximadamente 75% del metal l\u00edquido restante de la placa filtrante.<\/strong>
\n7. Finally, clean the perimeter and remove the filter plate after solidification.<\/strong><\/p>\n
\n1 . Filtro de espuma cer\u00e1mica<\/a>
\n2\u00a0 . Degassing Unit
\n3 . Filter Box
\n4\u00a0 . Hot-top casting series
\n5\u00a0 . Roll casting nozzle
\n6\u00a0 . Flux series
\n7\u00a0 \u00a0. Other Metallurgical Material<\/p>\n