Production and Characterization of Porous Anorthite Ceramics Using Sugar Process Solid Waste, Chamotte and Coal Powder Additives

Year 2024, , 433 - 439, 27.09.2024

Vacide Selin Kaya , Mücahit Sütçü , Emre Yalamaç , Onur Ertuğrul

https://doi.org/10.21205/deufmd.2024267809

Abstract

Press filter cake is a solid waste produced during sugar production process and includes carbonates and organic components. In this study, coal powder in different percentages (from 10 wt.% to 50 wt.%) was mixed with 35 wt.% press filter cake and 65 wt.% chamotte composition to produce porous anorthite ceramic products with different apparent porosity percentages. The anorthite phase was observed as the dominant crystalline phase in all fired samples. The firing shrinkage values sharply increased after adding higher than 40 wt.% coal powder to composition. In addition, apparent porosity values were changed from 49% to 70%. Compressive strength values reduced from 18 MPa to 1.73 MPa while percentages of ground coal were increasing. Microstructural analysis also showed that the porosity values of the sintered samples showed important changes depending on the amount of coal additive. The thermal conductivity values showed a reduction from 0.113 W/mK to 0.064 W/mK while increasing the percentage of ground coal. Micro-computed tomography (Micro CT) analysis was performed for 40wt. % coal powder added composition and the total porosity value was found as 60.2%.

Keywords

Porous ceramic, Anorthite, Press filter cake waste, Coal powder

Gözenekli Anortit Seramiklerin Şeker Proses Katı Atığı, Şamot ve Kömür Tozu Katkıları Kullanılarak Üretimi ve Karakterizasyonu

Abstract

Pres filtre keki, şeker üretim sürecinde ortaya çıkan, karbonatlar ve organik bileşenler içeren katı bir atıktır. Bu çalışmada farklı görünür gözeneklilik yüzdelerine sahip, gözenekli anortit seramikler üretmek için, ağırlıkça %35 pres filtre keki ve ağırlıkça %65 şamot bileşimi ile farklı yüzdelerde kömür tozu (ağırlıkça %10’dan %50’ye kadar) karıştırılmıştır. Pişirilen tüm örneklerde anortit fazı baskın kristal faz olarak gözlenmiştir. Bileşime ağırlıkça %40’tan fazla kömür tozu ilave edilmesiyle, pişirme büzülme değerleri hızlı bir şekilde artmıştır. Ayrıca görünür gözeneklilik değerleri %49’dan %70’e çıkmıştır. Kömür tozu yüzdeleri artarken basma dayanım değerleri 18MPa’dan 1,73MPa’a düşmüştür. Mikroyapı analizleri de sinterlenmiş numunelerin gözeneklilik değerlerinin kömür katkı miktarına bağlı olarak önemli ölçüde değiştiğini göstermiştir. Bileşimdeki kömür tozu yüzdesi arttırılırken, termal iletkenlik değerleri, 0,113 W/mK’den 0,064 W/mK’e düşme göstermiştir. Ağırlıkça %40 kömür tozu katkılı bileşim için Mikro bilgisayarlı tomografi (Micro CT) analizi yapılmış ve toplam gözeneklilik değeri %60,2 olarak bulunmuştur.

Keywords

Gözenekli seramik, Anortit, Pres filtre keki atığı, Kömür tozu

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