Production of Anti-Corrosive Industrial Zinc Chromate Complex Solution from Zinc Extraction Residue

Zeynel Abidin Sarı; M. Deniz Turan

Makale detayları

Production of Anti-Corrosive Industrial Zinc Chromate Complex Solution from Zinc Extraction Residue

Yazarlar:

Zeynel Abidin Sarı | M. Deniz Turan

Yayıncı:

Fırat University

Ana Başlıklar:

Hidrometalurji

Dergi:

Fırat Üniversitesi Mühendislik Bilimleri Dergisi Vol.36 Issue 1, pp.211-220

Belge Tipi:

Makale

Yayın Tarihi:

3/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001302450

pISSN:

1308-9072

Anahtar kelimeler:

Özet:

 Zinc plant residues contain significant amounts of zinc, lead, and other metal compounds, thus they are considered as a secondary source of metals. In this study, an attempt was made to produce industrial anti-corrosive zinc chromate complex solution ZnCrO42- under optimum conditions by selectively leaching the zinc plant residue under various parameters in the presence of sulfuric acid and potassium dichromate. For this purpose, leaching experiments were carried out in 100 ml glass flaks using a flaks heater device with multiple magnetic stirrers. According to the results obtained, it was determined that zinc recovery increased with increasing leaching temperature, while iron, which reduced selectivity, dissolved to a limited extent. As optimum conditions, 0.5 M H2SO4 concentration, 0.5 M K2Cr2O7 concentration, 368 K leaching temperature, 180 min leaching time, 25 mLg liquid-solid ratio and 600 rpm stirring speed, Zn and Fe extraction efficiencies were determined as 81.5 and 5.3, respectively. On the other hand, in the Raman spectroscopy analysis performed to reveal the presence of zinc chromate complex in the leach solution, it was determined that Zn2 ions were in coordination with chromate CrO42-. The coordination number calculated by Raman spectroscopy turned out to be 3.6, which reveals the presence of ZnCrO42- in solution. In addition, it was determined that under optimum conditions, Pb did not dissolve at all and remained in the form of sulfates andor partially chromates in the leach residue.

 Zinc plant residues contain significant amounts of zinc, lead, and other metal compounds, thus they are considered as a secondary source of metals. In this study, an attempt was made to produce industrial anti-corrosive zinc chromate complex solution ZnCrO42- under optimum conditions by selectively leaching the zinc plant residue under various parameters in the presence of sulfuric acid and potassium dichromate. For this purpose, leaching experiments were carried out in 100 ml glass flaks using a flaks heater device with multiple magnetic stirrers. According to the results obtained, it was determined that zinc recovery increased with increasing leaching temperature, while iron, which reduced selectivity, dissolved to a limited extent. As optimum conditions, 0.5 M H2SO4 concentration, 0.5 M K2Cr2O7 concentration, 368 K leaching temperature, 180 min leaching time, 25 mLg liquid-solid ratio and 600 rpm stirring speed, Zn and Fe extraction efficiencies were determined as 81.5 and 5.3, respectively. On the other hand, in the Raman spectroscopy analysis performed to reveal the presence of zinc chromate complex in the leach solution, it was determined that Zn2 ions were in coordination with chromate CrO42-. The coordination number calculated by Raman spectroscopy turned out to be 3.6, which reveals the presence of ZnCrO42- in solution. In addition, it was determined that under optimum conditions, Pb did not dissolve at all and remained in the form of sulfates andor partially chromates in the leach residue.

 Zinc plant residues contain significant amounts of zinc, lead, and other metal compounds, thus they are considered as a secondary source of metals. In this study, an attempt was made to produce industrial anti-corrosive zinc chromate complex solution ZnCrO42- under optimum conditions by selectively leaching the zinc plant residue under various parameters in the presence of sulfuric acid and potassium dichromate. For this purpose, leaching experiments were carried out in 100 ml glass flaks using a flaks heater device with multiple magnetic stirrers. According to the results obtained, it was determined that zinc recovery increased with increasing leaching temperature, while iron, which reduced selectivity, dissolved to a limited extent. As optimum conditions, 0.5 M H2SO4 concentration, 0.5 M K2Cr2O7 concentration, 368 K leaching temperature, 180 min leaching time, 25 mLg liquid-solid ratio and 600 rpm stirring speed, Zn and Fe extraction efficiencies were determined as 81.5 and 5.3, respectively. On the other hand, in the Raman spectroscopy analysis performed to reveal the presence of zinc chromate complex in the leach solution, it was determined that Zn2 ions were in coordination with chromate CrO42-. The coordination number calculated by Raman spectroscopy turned out to be 3.6, which reveals the presence of ZnCrO42- in solution. In addition, it was determined that under optimum conditions, Pb did not dissolve at all and remained in the form of sulfates andor partially chromates in the leach residue.

 Çinko ekstraksiyon artığı Ç.E.A önemli miktarda çinko, kurşun, vb. metal bileşikleri içerir, dolayısıyla ikincil bir metal kaynağı olarak kabul edilirler. Bu çalışmada, çinko ekstraksiyon artığının sülfürik asit ve potasyum dikromat varlığında çeşitli parametrelerde selektif olarak liç edilerek optimum şartlarda endüstriyel korozyon önleyici çinko kromat kompleks çözeltisi ZnCrO42- üretilmeye çalışılmıştır. Bunun için liç deneyleri, çoklu manyetik karıştırıcılı balon ısıtıcı bir düzenek vasıtasıyla 100 mllik cam balonlarda gerçekleştirilmiştir. Elde edilen sonuçlara göre artan liç sıcaklığı ile birlikte çinko kazanımının arttığı diğer taraftan selektifliği azaltan demirin ise sınırlı oranda çözündüğü belirlenmiştir. Optimum şartlar olarak 0.5 M sülfürik asit H2SO4 derişimi, 0.5 M potasyum dikromat K2Cr2O7 derişimi, 368 K liç sıcaklığı, 180 dk liç süresi, 25 mLg sıvı-katı oranı ve 600 rpm karıştırma hızında Zn ve Fe ekstraksiyon verimleri sırasıyla 81.5 ve 5.3 olarak bulunmuştur. Diğer taraftan liç çözeltisinde çinko kromat kompleksi varlığını ortaya koymak için yapılan Raman spektroskopisi analizinde Zn2 iyonlarının kromat CrO42- ile koordinasyon halinde bulunduğu belirlendi. Raman spektroskopisi ile hesaplanan koordinasyon sayısının 3,6 olduğu ortaya çıktı, bu da çözeltide ZnCrO42- mevcudiyetinin var olduğunu ortaya koymaktadır. Ayrıca optimum şartlarda Pbnin hiç çözünmediği ve liç kalıntısında sülfatları veveya kısmen kromatları şeklinde kaldığı saptandı.

Makale detayları

Production of Anti-Corrosive Industrial Zinc Chromate Complex Solution from Zinc Extraction Residue

Yazarlar:

Zeynel Abidin Sarı | M. Deniz Turan

Yayıncı:

Fırat University

Ana Başlıklar:

Hidrometalurji

Dergi:

Fırat Üniversitesi Mühendislik Bilimleri Dergisi Vol.36 Issue 1, pp.211-220

Belge Tipi:

Makale

Yayın Tarihi:

3/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001302450

pISSN:

1308-9072

Zinc plant residue

potassium dichromate

sulfuric acid

zinc metal

industrial zinc chromate complexÇinko ekstraksiyon artığı

potasyum dikromat

sülfürik asit

çinko metali

endüstriyel çinko kromat kompleksi

Sayı

Makale detayları

Yazarlar: Zeynel Abidin Sarı | M. Deniz Turan

Yayıncı: Fırat University

Ana Başlıklar: Hidrometalurji

Dergi: Fırat Üniversitesi Mühendislik Bilimleri Dergisi Vol.36 Issue 1, pp.211-220

Belge Tipi: Makale

Yayın Tarihi: 3/2024

Belge Dili: Türkçe

Document ID (Org No.): 2001302450

pISSN: 1308-9072

Sayı

Yazarlar:

Zeynel Abidin Sarı | M. Deniz Turan

Yayıncı:

Fırat University

Ana Başlıklar:

Hidrometalurji

Dergi:

Fırat Üniversitesi Mühendislik Bilimleri Dergisi Vol.36 Issue 1, pp.211-220

Belge Tipi:

Makale

Yayın Tarihi:

3/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001302450

pISSN:

1308-9072