Iron Ore Pellets Optimalkan Produksi Pig Iron

Iron Ore Pellets are formed from beneficiated or run of mine iron fines.  The iron is usually ground to a very fine level and mixed with limestone or dolomite as a fluxing agent and bentonite or organic binders as a binding agent. 

If the ore is a Hematite ore, coke or anthracite coal can be added to the mix to work as an internal fuel to help fire the pellets. This mixture is blended together in a mixer and fed to balling discs or drums to produce green pellets of size typically about 9-16mm.  The green pellets are then fed to the induration machine. 

Both straight grates and grate kilns dry the pellets out in a drying section, then bring the pellets up to a temperature of about 800-900 °C in a preheat zone, then finish the induration process at roughly 1200-1350 °C. 

The pellets are then cooled to a suitable temperature for transporting to a load out facility. Both processes recycle the heat from the pellet back through the process to aid in energy efficiency and decrease fuel usage.

Pembuatan iron ore pellets bertujuan untuk memanfaatkan butiran iron ore yang terlalu halus atau yg sudah berbentuk debu. Iron ore biasanya ditumbuk hingga mencapai tingkat yang sangat halus dan dicampur dengan batu kapur atau dolomit sebagai fluxing agent dan bentonit atau organik lain sebagai bahan pengikat. Jika iron ore ini berupa adalah hematit ore bisa ditambah batu bara atau anthracite coal sebagai bahan bakar internal guna membantu pembakaran pellets ini. Campuran ini dicampur menjadi satu dalam mixer dan dimasukkan ke dalam cetakan untuk menghasilkan bentuk bulat dengan ukuran sekitar 9-16mm.

Butiran pelet ini kemudian dikirim untuk proses pengeringan dengan memanaskan hingga sekitar 800-900 celcius di zona preheat, kemudian menyelesaikan proses pengeringan di sekitar 1200-1350 celcius.

Kemudian, butiran-butiran pellets itu didinginkan hingga suhu yang cocok untuk proses mengangkut muatan ke fasilitas lain.

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