Removal of zinc from dusts and sludges from basic oxygen furnaces in the process of ammoniacal leaching

Gargul, K.; Boryczko, Bożena

doi:10.1016/j.acme.2014.08.004

Cited by 32 publications

(24 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The K w values for temperatures ranging from 273 to 373 K are listed in Table 3 [12]. The presented data shows clearly that the increase in the temperature is accompanied by the increase in the ionic product of water, particularly at 348-373 K, when this product is from 20 to 50 times higher than the one at 298 K. This means that at increased temperatures the H + ions level increases from above 4 to 7 times versus the one at 298 K, and therefore, the conditions are much better for the reaction to occur (3)(4)(5). Figure 5 shows a diagram illustrating areas of thermodynamic phase stability in the Zn-H 2 O configuration [13].…”

Section: Thermodynamic Conditions Of the Leaching Processmentioning

confidence: 58%

“…For leaching at relatively low hydroxide levels, it is possible for the reaction (5) to occur, being a condition for subsequent reactions (6)(7)(8). The environment in reactions (3)(4)(5) contains H + ions. They can therefore occur only when these ions are present in the leaching solution, and the process kinetics will be proportional to hydrogen cation levels in the solution.…”

Section: Thermodynamic Conditions Of the Leaching Processmentioning

confidence: 99%

“…Sludges from BOF are usually stored for a long time under conditions allowing the atmospheric effects. Performed tests [5] indicate the possibilities of leaching the significant amounts of zinc and their penetration into the soil and groundwater. The recovery of zinc from such a material is consistent with the policy of sustainable development and helps to reduce the environmental load of stored waste.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Alkaline Leaching of Low Zinc Content Iron-Bearing Sludges

Gargul¹,

Jarosz²,

Małecki³

2016

Archives of Metallurgy and Materials

Self Cite

View full text Add to dashboard Cite

AlkAlIne leAchIng OF lOW ZInc cOnTenT IROn-BeARIng SlUDgeSVarious types of waste materials containing zinc (e.g. dusts and sludges from gas dedusting process) are obtained in steel industry. The contents of Zn in these materials may vary considerably. Even a low concentration of zinc in recirculated products precludes their recycling in ferrous metallurgy aggregates. Long storage of this type of material can lead to contamination of soil and water by zinc compounds which can be leached out by acid rain, for example. This paper focuses on research involving alkaline leaching tests of low zinc content iron-bearing materials. These tests were preceded by the analysis of the elemental, phase and grain size composition, and analysis of the thermodynamic conditions of the leaching process. The main aim of research was to decrease the content of the zinc in the sludge to the level where it is suitable as an iron-bearing material for iron production (~1% Zn). Leaching at elevated temperatures (368 K, 60 min) has led to a decrease in the zinc content in the sludge of about 66%. The research revealed that long hour leaching (298 K, 100 hours) carried out at ambient temperatures caused a reduction in zinc content by 60% to the value of 1.15-1.2% Zn.

show abstract

Section: Thermodynamic Conditions Of the Leaching Processmentioning

confidence: 58%

Section: Thermodynamic Conditions Of the Leaching Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Alkaline Leaching of Low Zinc Content Iron-Bearing Sludges

Gargul¹,

Jarosz²,

Małecki³

2016

Archives of Metallurgy and Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Pada proses hidrometalurgi menggunakan pelarut asam atau basa, sedangkan pada proses pirometalurgi menggunakan suhu tinggi (Rao 2006). Beberapa penelitian yang telah dilakukan untuk mendapatkan seng oksida dari limbah industri, yaitu sludge dari proses basic oxygen furnace menggunakan NH 4 Cl (Gargul et al 2014), abu dari proses oxygen furnace menggunakan asam sulfat (Trung et al 2014), limbah samsonit (calcium carbonat) dikalsinasi (Zhang et al 2013), limbah zinc ferrite dengan asam klorida (Langova et al 2009). Terdapat beberapa metode untuk pengambilan kembali seng dari limbah adalah metode ekstraksi dengan asam sulfat (Barakat.…”

Section: Pendahuluanunclassified

Proses Ekstraksi Seng Oksida Dari Seng Dross Menggunakan Metode Hidrometalurgi Sistim Terbuka

Agustina¹

2016

J. Kimia Kemasan

View full text Add to dashboard Cite

Seng oksida merupakan jenis bahan kimia yang banyak digunakan oleh masyarakat, diantaranya adalah untuk industri kosmetik, industri kesehatan, industri karet dan industri pertanian. Pada saat ini dalam memenuhi kebutuhan seng oksida di dalam negeri sebagian impor dari negara lain. Untuk substitusi impor akan seng oksida maka dicari potensi bahan baku yang dapat digunakan untuk pembuatan seng oksida, diantaranya adalah seng dross yang merupakan hasil samping dari industri galvanis sistem hot-dip. Penelitian ini bertujuan untuk mendapatkan kondisi proses ekstraksi seng dross dengan asam asetat glasial, sehingga menghasilkan seng oksida. Pada proses ekstraksi menggunakan metode hidrometalurgi sistem terbuka, variabel yang divariasi adalah waktu proses (30 menit, 60 menit, 90 menit dan 120 menit), suhu proses (150 o C, 170 o C dan 190 o C), dan konsentrasi asam asetat glasial (20 %, 40 % dan 60 %). Hasil penelitian menunjukkan bahwa kondisi proses yang terbaik adalah pada waktu 90 menit, suhu 150 o C, dan konsentrasi asam asetat glasial 60 %, didapatkan rendemen sebesar 62,45 % dan kadar seng dalam seng oksida adalah sebesar 70,23 %. Berdasarkan analisis X-ray diffraction (XRD) kristal seng oksida yang terbentuk sama dengan seng oksida standar. Seng dross berpotensi sebagai bahan baku untuk pembuatan seng oksida,sehingga dapat digunakan sebagai bahan substitusi impor.

show abstract

“…The zinc content ranges from 0.5% to 8% with 50-80% of zinc as ZnO and the rest as ZnFe 2 O 4 . The iron content in the dust varies between 50% and 75% [6][7][8][9]. Considering its high iron content, BOS dust is potentially a secondary iron resource for recovery.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Butyric Acid Leaching Behaviors of Zinc from Three Basic Oxygen Steelmaking Filter Cakes

Wang

Zhang

et al. 2019

Metals

View full text Add to dashboard Cite

The selective leaching of zinc from three different basic oxygen steelmaking (BOS) filter cakes by butyric acid was investigated to compare the leaching behaviors of zinc and further to establish the correlation of the zinc leaching performances and the chemical compositions. The effects of acid concentration and the acid to solid (L/S) stoichiometric ratio were studied, with different optimal leaching conditions obtained. BOS-1 showed the lowest leachability with only less than 10% of zinc removed by 0.5 M acid concentration and 90% of the L/S stoichiometric ratio in 10 h. The best zinc selectivity was achieved with BOS-2 at 51.2% of zinc leaching efficiency, with only 0.47% of iron loss under optimal conditions of 1.5 M acid concentration and a 70% stoichiometric ratio. BOS-3 showed the highest leaching of zinc but the optimal conditions depend on the priority consideration. Using 1.0 M acid and 90% stoichiometric ratio for 10 h, the leaching efficiency of zinc was 84.6% with 20% iron loss. The filter cakes and the leaching residues were characterized. The results indicate different zinc and iron leaching behaviors, which were probably related to the storage conditions, zinc containing phases and the leaching parameters.

show abstract

Removal of zinc from dusts and sludges from basic oxygen furnaces in the process of ammoniacal leaching

Cited by 32 publications

References 4 publications

Alkaline Leaching of Low Zinc Content Iron-Bearing Sludges

Alkaline Leaching of Low Zinc Content Iron-Bearing Sludges

Proses Ekstraksi Seng Oksida Dari Seng Dross Menggunakan Metode Hidrometalurgi Sistim Terbuka

Comparison of Butyric Acid Leaching Behaviors of Zinc from Three Basic Oxygen Steelmaking Filter Cakes

Contact Info

Product

Resources

About