Usage of acetic acid for boric acid production from boron wastes

Year 2022, Volume: 11 Issue: 3, 819 - 825, 18.07.2022

Emine Yoğurtcuoğlu

https://doi.org/10.28948/ngumuh.1088309

Abstract

Turkey's boric acid production has the highest production share among refined boron products. This production is takes place at the Bandırma (Balıkesir) and Emet (Kütahya) Boric Acid Plants of ETI Maden Operations. Concentrated ore (by physical processes) and high-grade wastes accumulated in waste ponds/dams are obtained from boron production plants. In this study, slime size (d80=52.70μm) wastes belonging to the Bigadiç field with 9-12% B2O3 (ulexite-colemanite) content have been evaluated. Due to the small size of feeding without the need for grinding, the sample was subjected to leaching of acetic acid at 60°C for 1 hour, at a mixing speed of 1500 rpm, at 7% solids. In addition to the recovery of 90% H3BO3 (at 4% acid concentration) after the leaching process, different compounds such as Na2O, and CaO were also obtained. Similar peaks were found in the FT-IR analyzes of boric acid and the product obtained. This study is an important output in terms of evaluating the % B2O3 content in the wastes of both this plant and other boron plants.

Keywords

Boron waste pond/dams, boric acid, ulexite, colemanite, acetic acid

Bor atıklarından borik asit üretiminde asetik asidin kullanımı

Abstract

Türkiye'nin borik asit üretimi rafine bor ürünleri arasında en yüksek üretim payına sahiptir. Söz konusu bu üretim ETİ Maden İşletmelerinin Bandırma (Balıkesir) ve Emet (Kütahya) Borik Asit Tesislerinden üretilmektedir. Bor üretim tesislerinden konsantre cevher (fiziksel işlemlerle) ve atık havuzlarında/barajlarda biriktirilen yüksek tenörlü atıklar elde edilmektedir. Bu çalışmada, Bigadiç sahasına ait %9-12 B2O3 (üleksit-kolemanit) içeriğine sahip şlam boyutundaki (d90=81.94μm) atıklar değerlendirilmiştir. Numune, öğütülmeye ihtiyaç duyulmadan küçük besleme boyutundan dolayı 60°C'de 1 saat, 1500 rpm karıştırma hızında, %7 katı oranında asetik asit liç işlemine tabi tutulmuştur. Liç işlemi sonrasında %90 H3BO3 (%4 asit konsantrasyonunda) veriminin yanı sıra Na2O ve CaO gibi farklı bileşikler de elde edilmiştir. Borik asit ve elde edilen ürünün FT-IR analizlerinde benzer pikler bulunmuştur. Bu çalışma, hem bu tesisin hem de diğer bor tesislerinin atıklarındaki % B2O3 içeriğinin değerlendirilmesi açısından önemli bir çıktıdır.

Keywords

kolemanit, Bor atığı, Borik asit, Üleksit, Asetik asit

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