Investigation of Alternative Material and Design of Rotary Kiln: A Case Study

Rotary kilns have widespread usage in many field of industry due to continues flow and heating the products inside it, simultaneously. Rotary kiln can be used in the process of alumina, cement, lime, magnesium etc. Rotary kiln material for corrosive process media is usually designated as stainless steel. In some media as high temperature and dilute acidic, even stainless steel can be subject to rapid corrosion. In this study, an alternative material, titanium Gr 2, was investigated instead of conventional 316L (1.4404) quality stainless steel material of rotary kiln. Due to the different physical properties of titanium Gr 2 material, two different alternative designs were prepared and analyzed with the model. In the first design the outside of the titanium shell of the rotary kiln was covered with 316L (1.4404) quality steel material. In this design, different thermal expansion of the materials limited the usage of hybrid materials at high temperature. Therefore, as a second alternative the length of the rotary kiln was extended. According to required product output temperature the required of the length extension was calculated as 4600 mm.

Döner Fırının Alternatif Malzeme ve Tasarımının İncelenmesi: Bir Örnek Olay

Döner fırın, içerisindeki ürünlerin sürekli akması ve aynı zamanda ısıtılması nedeniyle endüstrinin birçok alanında yaygın olarak kullanılmaktadır. Alümina, çimento, kireç, magnezyum vb. işlemlerinde döner fırın kullanılabilmektedir. Bu çalışmada fırınların yaygın bir malzemesi olan klasik 316L (1,4404) kalite çelik malzemesi yerine alternatif bir malzeme olan titanyum Gr 2 malzemesi incelenmiştir. Titanyum Gr 2 malzemenin farklı fiziksel özelliklerinden dolayı model ile iki farklı alternatif tasarım hazırlanmış ve analiz edilmiştir. İlk tasarımda döner fırının titanyum kabuğunun dışı 316L (1,4404) kalite çelik malzeme ile kaplanmıştır. Bu tasarımda malzemelerin farklı termal genleşmeleri, hibrit malzemelerin yüksek sıcaklıkta kullanımını sınırlandırmıştır. Bu nedenle, ikinci bir alternatif olarak döner fırının uzunluğu arttırılmıştır. İstenilen ürün çıkış sıcaklığının elde edilebilmesi için 4600 mm boy uzatmana gerek olduğu hesaplanmıştır

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