Difference of zinc volatility in diverse carrier minerals: The critical limit of blast furnace dust recycle

HU, Wen; Xia, Han wen; Pan, Dong; Wei, Xin; Li, Jia; Dai, Xiao jie; Yang, Feihua; Lu, Xin; Wang, Hua Jun

doi:10.1016/j.mineng.2017.11.001

Cited by 17 publications

(7 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It connects direct reduction and leaching processes together, which may convert diaspore and boehmite into water-soluble aluminate by reacting with added sodium carbonate while reducing hematite and goethite into elemental iron and then recycling them through magnetic separation from leach residue. Further information on this new manner was discussed in our previous reports [16][17][18][19][20][21]. Some defects in this method were also observed, such as the excessive demand of Na 2 CO 3 [18,19].…”

Section: Introductionmentioning

confidence: 92%

Promote Alumina Leaching through Re-Pelleting: Effects of Directional Coating of Calcite on Silicate Grains

Hu¹,

Qiu²,

Wei³

et al. 2018

Minerals

Self Cite

View full text Add to dashboard Cite

Abstract:The contents of Fe and SiO 2 in ferric bauxite are much higher than that in regular bauxite, and the leaching yield of Al 2 O 3 from ferric bauxite cannot reach the general level of ordinary ores, even under optimal conditions. This paper introduces a pretreatment method to enhance sintering before leaching. First, mixing followed by grinding was found to be more efficient than grinding followed by mixing as a pretreatment method by forming a directional coating structure of CaCO 3 on the SiO 2 surface. Second, leaching yields increased grinding fineness because CaCO 3 grain uniformity could be improved with the latter method. Finally, the leaching yields were increased by pulp consistency under certain conditions, as evidenced by improvements in CaCO 3 uniformity, bulk density, and Al 2 O 3 grain size, which parameters were beneficial to enhance leaching. The leaching yield of Al 2 O 3 was increased from 75.2% to 87.15% by using the proposed mixing-grinding method with the leaching agent of water.

show abstract

Section: Introductionmentioning

confidence: 92%

Promote Alumina Leaching through Re-Pelleting: Effects of Directional Coating of Calcite on Silicate Grains

Hu¹,

Qiu²,

Wei³

et al. 2018

Minerals

Self Cite

View full text Add to dashboard Cite

show abstract

“…To reduce resource consumption and environmental pollution, such dust has been used as raw materials for blast furnace ironmaking [4][5][6]. However, the use of this dust causes the accumulation of zinc and alkali metals in the blast furnace, shortening the service life of the blast furnace and leading to poor production [7]. In recent years, some researchers have proposed new methods based on two schemes: integral use and recycling metals.…”

Section: Introductionmentioning

confidence: 99%

Coupled Thermodynamics and Phase Diagram Analysis of Gas-Duct Concretion Formation in Pyro-Processing Ironmaking and Steelmaking Dust

Wang

Hua

et al. 2021

Minerals

View full text Add to dashboard Cite

In recent years, the steel industry has accumulated approximately 100 million tons of dust annually, severely threatening the environment. Rotary kiln technology is one of the main industrial methods used to process this dust. However, some substances in flue gas congeal on the cooling wall of the gas duct and seriously affect production. In this study, the properties and formation mechanisms of the coagulum were investigated on the basis of experimental and thermodynamic analyses. The experimental results showed that the coagulum is mainly composed of chlorides (KCl, NaCl, and ZnCl2), oxides (ZnO, FeO), and carbon, with three structures: lumps, fibers, and particles. Based on a thermodynamic analysis, a reasonable explanation was proposed to clarify the formation mechanism. The liquid phase (a eutectic system of KCl–NaCl–ZnCl2), dendrites (KCl, NaCl), and particles (ZnO, FeO, C) were found to act as binders, stiffeners, and aggregates in the coagulum, respectively, constituting a composite structure. Liquids acting as binders are essential for coagulum formation, and dendrites and particles strengthen this effect. Furthermore, the eutectic system of chlorides plays a crucial role in coagulum formation. The results of the present study offer a theoretical understanding of gas-duct coagulation and will provide guidance for adopting alleviation measures.

show abstract

“…Blast Furnace Dust (BFD) is a residue of the process of transformation of the iron mineral into cast iron in integrated steelworks [7]. The integrated steel working process begins with the mining of prime materials: iron mineral, carbon, and lime [8].…”

Section: Introductionmentioning

confidence: 99%

Uso de polvo de alto horno para mejorar las propiedades de material granular para pavimentos

Díaz

2021

Rev. UIS ing.

View full text Add to dashboard Cite

The granular base and sub-base materials used in the construction of road surface structures must comply with certain requirements. In some cases, the requirements are not complied with and it is necessary to search for alternatives to improve the properties of the materials and thereby enable the use of these materials in the construction of roadways. Blast furnace dust is a residue from the production of steel that is of little use and is causing a negative environmental impact due to its accumulation. This study was carried out to analyse the possibility of utilizing blast furnace dust to improve the properties of granular materials, as an alternative that mitigates the environmental problems caused by the disposal and accumulation of these residues, which affect the areas of influence of these companies. To achieve this goal, the chemical and physical properties of blast furnace dust were determined and a analysis was carried out on mixtures of granular base and sub-base materials with 0, 2, 4, 6, and 8 percent dust. The analysis took place of determined characteristics including optimum humidity, maximum dry density, resistance, plasticity, and expansion in the presence of water. The results indicate that with the incorporation of 6% of BFD the properties of the granular material are improved and it can be used as an optimal material in road construction.

show abstract

Difference of zinc volatility in diverse carrier minerals: The critical limit of blast furnace dust recycle

Cited by 17 publications

References 16 publications

Promote Alumina Leaching through Re-Pelleting: Effects of Directional Coating of Calcite on Silicate Grains

Promote Alumina Leaching through Re-Pelleting: Effects of Directional Coating of Calcite on Silicate Grains

Coupled Thermodynamics and Phase Diagram Analysis of Gas-Duct Concretion Formation in Pyro-Processing Ironmaking and Steelmaking Dust

Uso de polvo de alto horno para mejorar las propiedades de material granular para pavimentos

Contact Info

Product

Resources

About