{"id":468,"date":"2017-08-10T10:36:31","date_gmt":"2017-08-10T10:36:31","guid":{"rendered":"https:\/\/goodrichmagma.com\/demo\/?page_id=468"},"modified":"2017-12-05T04:57:05","modified_gmt":"2017-12-05T04:57:05","slug":"oxygen-melting-of-metal-scrap-and-sponge-iron-in-magma","status":"publish","type":"page","link":"https:\/\/goodrichmagma.com\/index.php\/oxygen-melting-of-metal-scrap-and-sponge-iron-in-magma\/","title":{"rendered":"Oxygen-melting of metal scrap and sponge iron in MAGMA"},"content":{"rendered":"

Scrap and slag-forming materials are smelted in a liquid bath of molten metal formed upon starting the smelting unit MAGMA.<\/p>\n

For refining of the molten metal from phosphorus and partially from sulphur, oxidized basic slag (slag ratio 0.05-0.06) is put over the molten metal which is, from time to time, renewed.<\/p>\n

The heat\u00a0 required\u00a0 for\u00a0 metal\u00a0 heating and\u00a0 smelting\u00a0 is fed\u00a0 into\u00a0 the working\u00a0 space\u00a0 of\u00a0 the\u00a0 smelting\u00a0 chamber by fuel-oxygen or oxygen burner\u00a0 and by\u00a0 oxidation of\u00a0 coal by gaseous oxygen\u00a0 fed\u00a0 into\u00a0 the\u00a0 bath\u00a0 by special lances.<\/p>\n

Temperature of molten slag is 1,600-1,650\u00b0\u0421 and the temperature of metal is 1,500-1,580\u00b0\u0421.<\/p>\n

The generated metal semi-product is non-continuously released from the smelting chamber into the ladle and transported further to the heating facility of the ladle-furnace unit.<\/p>\n

Processed slag\u00a0\u00a0 is released from\u00a0\u00a0 the\u00a0\u00a0 smelting\u00a0\u00a0 chamber non- continuously. At a later stage, it can be used for production of Portland cement clinker.<\/p>\n

Production capacity of the standard model of MAGMA for scrap reaches 50-55 tons per hour.<\/p>\n

The smelting unit can also operate with extra-furnace heating of scrap by off-gases. Above the smelting chamber, a hermetically sealed shaft heater of scrap, in this case, is installed.The shaft heater is being equipped with holding and dozing devices and lances for after burning of CO in the off-gases.<\/p>\n

Production capacity of MAGMA in this case increases up to 65 tons per hour.<\/p>\n

Use of MAGMA for continuous smelting of ferrous metals\u2019 scrap and production of metal semi-product allows to significantly reducing the aggregate consumption of fuel as compared with conventional arc steel furnaces, due to more rational use of the energy of primary fuel.<\/p>\n

The proposed technology of\u00a0 scrap\u00a0 processing has\u00a0 a\u00a0 number of technical\u00a0 and economic advantages over the conventional, combination process used\u00a0 in\u00a0 electric-smelting of\u00a0 steel: \u00a0steel\u00a0 electric\u00a0 arc\u00a0 furnace and ladle- furnace unit.<\/p>\n

First of all, this means an increase of output of proper liquid metal in smelting. While the conventional smelting of scrap in an arc furnace with the use of smelting intensifiers provides an output of proper product in the range of 91-92%, the proposed technology provides an output of proper product after scrap smelting in the range of 94-95%.<\/p>\n

Increase of output of the proper product is achieved through:<\/p>\n