Advanced converter sludge utilization technologies for the recovery of valuable elements: A review

Wang, Yaozu; Liu, Zhengjian; Zhang, Jianliang; Mao, Rui; Zhang, Yapeng

doi:10.1016/j.jhazmat.2019.120902

Cited by 28 publications

(11 citation statements)

References 82 publications

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“…It is noticed from "Fig. 3" that the behaviour of the sludge when added is similar in many of the properties of aluminium to achieving stabilization and restabilization again( Ahmad, T., et al (2016); Wang, Liu et al 2020; [14,15] which occurs when adding small or more than necessary quantities of coagulants. This gives the impression that raw water that contains high sludge can lead to a reduction in the removal efficiency when using the same amount of added alum, and this is a natural issue as it is not in the area to continue adding brownish that can lead to getting rid of the brownish As the return or nonreturn of sludge, which depends on the sludge entering the station, is a very important issue, which was mentioned by (Gilani 2001); Gilani 2001) [16,17].…”

Section: Discussionmentioning

confidence: 93%

“…Processing determinants and parameters have been studied by many researchers, and concluded that the specific characteristics of sludge resulting from the coagulation process using alum are as follows [9][10][11][12][13][14][15]: Bio-oxygen requirement (BOD) 150 -40 mg / L., Chemical oxygen requirement (COD) 340 -5,000 mg / L., Suspended Solids (TSS) 1100 -14000 mg Liters., Volatile Substances (VSS) 600 -4000 mg / L., The pH is neutral. Also, (Cornwell and Lee) (16) showed that the level of Cryptosporidium could range between 2900 and 47000 cells/ml, for the return water from the sedimentation and filtration basins after some concentration of it.…”

Section: Introductionmentioning

confidence: 99%

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The Effectiveness of Return Sludge in Removing Undesirable Materials From Clariflocculator Basins

Hasan

2021

JEASD

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To assess the use of returned sludge in water reatment, samples were brought from the Tigris River water during the summer and fall of 2002. A chemical treatment was carried out on it using alum as a coagulant, and after adding different percentages of sludge deposited at the bottom of the clarification ponds, it was found that returning 50% of the sludge improves the removal efficiency by an amount that can reach 14%. This applies to models with low and medium turbidity; otherwise, the reduction in removal efficiency is due again. The aluminium sulphate and hydroxides deposited at the bottom of the pond and recycled with the reflux sludge contributed to the improvement of the removal efficiency.

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Section: Discussionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

The Effectiveness of Return Sludge in Removing Undesirable Materials From Clariflocculator Basins

Hasan

2021

JEASD

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“…Iron ore sintering is an important process capable of absorbing and treating various types of industrial solid waste, and there has been a great deal of research pointing to the effective digestion of solid waste in sintering process 25,90,[128][129][130][131][132] . The optimization of granulation for different types of solid wastes is necessary because of the significant differences between solid wastes and sintering raw materials in terms of physical properties such as size and surface properties, which can directly affect the granulation performance.…”

Section: 5: Solid Waste In Granulationmentioning

confidence: 99%

Iron Ore Granulation for Sinter Production: Developments, Progress, and Challenges

et al. 2023

Self Cite

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Iron ore granulation is an indispensable process in the production of sinter that can influence and regulate the yield, efficiency and quality. Although a great deal of research has been done on the granulation process over the past decades, we still need to think about the current and future development of this process, as sinter is still an essential raw material for ironmaking blast furnace today. This paper begins with a review of particle agglomeration theory development for sintering granulation, followed by a summary of existing granulation evaluation methods and indexes. The roles of iron ore, fuel, fluxes, and moisture in sintering granulation are also analyzed, and finally advanced granulation equipment and processes for industrial production, as well as their applications, are summarized. Correspondingly, the challenges in sintering granulation field are proposed to include: (1) Development of iron ore sintering industry; (2) Ore blending optimization based on synergistic coupling of granulation and sintering; (3) Optimization of granulation process and equipment; (4) Methods and tools for granulation scientific research. These issues will be tackled and overcome in the future by both steel enterprises and academic researchers, generating suggestions for future development in the field of sintering granulation.

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“…1,2 Iron ores from Australia, South Africa, and India account for a large proportion of these imports and usually exhibit high -alumina contents. 3,4 Furthermore, there is no effective mineral processing technique for removing alumina from high-alumina iron ores. 5,6 Meanwhile, an iron ore sinter is a crucial material for the ironmaking process, and its chemical, physical, and metallurgical properties significantly impact the blast furnace (BF) performance.…”

Section: ■ Introductionmentioning

confidence: 99%

Characteristics and Sintering Mechanisms of Iron Ores with a High Proportion of High-Al₂O₃ Limonite

Chen

Huang

et al. 2023

ACS Omega

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In this study, a sintering test of high-alumina limonite from Indonesia, matched with an appropriate magnetite concentration, is performed. The sintering yield and quality index are effectively improved by optimizing the ore matching and regulating the basicity. For the optimal coke dosage of 5.8% and basicity of 1.8, the tumbling index of the ore blend is found to be 61.5% and the productivity is 1.2 t/(h·m 2 ). The main liquid phase in the sinter is the silico-ferrite of calcium and aluminum (SFCA), followed by a mutual solution, both of which maintain the sintering strength. However, when the basicity is increased from 1.8 to 2.0, the production of SFCA is found to increase gradually, whereas the mutual solution content decreases dramatically. A metallurgical performance test of the optimal sinter sample demonstrates that the sinter can meet the requirements of small- and medium-sized blast furnace smelting, even for high-alumina limonite ratios of 60.0–65.0%, thereby greatly reducing the sintering production costs. The results of this study are expected to provide theoretical guidance for the practical high-proportion sintering of high-alumina limonite.

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Advanced converter sludge utilization technologies for the recovery of valuable elements: A review

Cited by 28 publications

References 82 publications

The Effectiveness of Return Sludge in Removing Undesirable Materials From Clariflocculator Basins

The Effectiveness of Return Sludge in Removing Undesirable Materials From Clariflocculator Basins

Iron Ore Granulation for Sinter Production: Developments, Progress, and Challenges

Characteristics and Sintering Mechanisms of Iron Ores with a High Proportion of High-Al₂O₃ Limonite

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Advanced converter sludge utilization technologies for the recovery of valuable elements: A review

Cited by 28 publications

References 82 publications

The Effectiveness of Return Sludge in Removing Undesirable Materials From Clariflocculator Basins

The Effectiveness of Return Sludge in Removing Undesirable Materials From Clariflocculator Basins

Iron Ore Granulation for Sinter Production: Developments, Progress, and Challenges

Characteristics and Sintering Mechanisms of Iron Ores with a High Proportion of High-Al2O3 Limonite

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Characteristics and Sintering Mechanisms of Iron Ores with a High Proportion of High-Al₂O₃ Limonite