Journal of Powder Metallurgy & Mining
Open Access

Silicon-refined metallurgical slag; Flotation; Sodium silicate; Depressant

Introduction

Metallurgical-grade silicon-refined slag exhibits a complex chemical composition, with a range of elements, impurities, and mineral phases [1]. Characterization techniques, such as elemental analysis and phase identification, provide insights into the slag's composition and potential properties. The behavior of the slag can vary depending on its composition, mineralogy, and processing methods employed. Various processing techniques, including crushing, grinding, magnetic separation, and chemical extraction, can be employed to optimize the utilization of metallurgical-grade silicon-refined slag. These techniques aim to recover valuable components, remove impurities, or transform the slag into a form suitable for specific applications. Utilization in various applications metallurgical-grade siliconrefined slag finds applications in diverse fields such as cement production, construction materials, soil amendment, abrasives, insulation materials, and refractories. Incorporating slag in cementitious matrices or construction materials can improve mechanical properties and enhance material performance [2]. As a soil amendment, the slag can enhance soil fertility, nutrient availability, and potentially benefit plant growth. Other applications benefit from the slag's properties, such as hardness, thermal conductivity, or refractoriness.

Titanium (Ti) and Ti-based combinations have been utilized broadly for muscular and dental inserts because of their great mechanical properties, astounding consumption opposition, and good biocompatibility. In any case, the high potential for aseptic releasing of the inserts is as yet a significant issue. Clinical practices and studies have demonstrated that the confusing of the flexible modulus between unadulterated Ti and its compounds and normal bone can prompt pressure safeguarding and accordingly causes bone resorption prompting disappointment of the metallic embed installations.

Additionally, there is a lack of biological anchorage for bone-tissue in-growth and weak interfacial bonding between implants and natural bone that cannot be ignored. Besides, delivering of poisonous aluminum (Al) and vanadium (V) particles after some time for most at present generally utilized Ti composites, for example, Ti-6Al-7Nb and Ti-6Al-4V (wt%, from now on), is causing different sicknesses, like Alzheimer's infection and mental problem. As a result, new Ti alloys with a low elastic modulus that is comparable to that of native bone, high biocompatibility, and the ability to osteointegrate are urgently needed for clinical applications. Outstanding models incorporate TiNbZr and TiMo base compounds [3]. TiNbZr alloys with varying amounts of niobium (Nb) and zirconium (Zr) have received a lot of attention because Nb and Zr are thought to not only have excellent biological responses but also have the potential to improve wear and corrosion properties.

Utilizing the d-electron theory, the molybdenum equivalence (Moeq), and the electron-to-atom ratio (e/a) approaches, recently designed a novel -Ti35Zr28Nb alloy. Even though the bulk Ti35Zr28Nb alloy had superior mechanical properties and excellent in vitro cytocompatibility, its elastic modulus was still at least twice as high as that of natural bone [4]. To coordinate the flexible modulus of Ti35Zr28Nb compounds with that of regular bone, a permeable construction was acquainted with the combinations. A specific level of porosity not just diminishes the flexible modulus of the combinations yet in addition prompts tight holding between the inserts and the encompassing bone tissue by permitting new bone-tissue ingrowth. Moreover, the permeable construction can give a pathway to the vehicle of supplements and oxygen, which is fundamental for vascularization during bone-tissue recovery. There are different strategies to create permeable platforms, like the powder metallurgy (PM) method utilizing space-holder sintering, frothing, and added substance fabricating [5]. Among them, the PM strategy combined with brief space-holder sintering is a practical handling technique to create permeable designs since this technique permits adaptable change of the piece of the metal powders and doesn't need costly hardware. As far as materials for holding space, sodium chloride, carbamide, sugar pellets, tapioca, saccharose, magnesium, and ammonium hydrogen carbonate have been used. Among these space-holder materials, NH4HCO3 is good for manufacturing permeable Ti frameworks since it has a minimal expense and is effectively eliminated by sintering during the platform creation.

In this review, Ti35Zr28Nb platforms were ready by the PM method utilizing NH4HCO3 as the space-holder material. The pore qualities, grid stage, mechanical properties, and in vitro biocompatibility of the PM-created platforms [6]. Then, at that point, the in vivo osseointegration of the frameworks was surveyed utilizing a Sprague- Dawley (SD) rodent model. In addition to presenting a straightforward manufacturing method for porous scaffolds, this study also provides the fundamental supporting information for their clinical applications as orthopedic implants.

Materials and Methods

Metallurgical-grade silicon-refined slag is a byproduct of the metallurgical process involved in the production of silicon metal. This slag contains various impurities and residual elements, and it can be further processed to extract valuable components or be used in other applications. The methods and materials used in the processing of metallurgical-grade silicon-refined slag can vary depending on the desired outcomes. Crushing and grinding the metallurgical-grade silicon-refined slag is typically subjected to crushing and grinding processes to reduce the particle size and improve the efficiency of subsequent processing steps [7]. Magnetic separation magnetic separation is often employed to remove magnetic impurities, such as iron, from the slag. This technique utilizes magnets to attract and separate the magnetic components from the non-magnetic slag.

Gravity separation gravity separation techniques, such as jigging or shaking tables, can be used to separate components based on their density differences. This process allows the separation of heavy and light components present in the slag. Froth flotation froth flotation can be applied to selectively separate specific minerals or components from the slag. It utilizes the differences in surface properties of the materials to achieve separation.

Acid leaching acid leaching involves treating the slag with acids to selectively dissolve and recover specific components. This method is commonly used to extract valuable metals or elements from the slag, such as silicon, aluminum, or other trace elements. Alkaline leaching alkaline leaching is used to dissolve and remove alkaline elements or compounds present in the slag. This technique helps in reducing the environmental impact and preparing the slag for further processing or utilization.

Cement production metallurgical-grade silicon-refined slag can be used as a raw material in cement production [8]. The slag is typically ground to a fine powder and mixed with cementitious materials to enhance its strength and improve the cement properties. Construction materials the slag can be utilized as an aggregate in construction materials, such as concrete or road construction. It provides added strength and durability to the final product. Soil amendment the slag can be used as a soil amendment or fertilizer due to its high silicon and mineral content [8]. It can improve soil fertility, enhance plant growth, and provide other beneficial effects. Other applications metallurgicalgrade silicon-refined slag can be utilized in various applications such as abrasives, insulation materials, or as a raw material in the production of refractories.

These methods and materials are commonly employed in the processing and utilization of metallurgical-grade silicon-refined slag. The specific techniques used depend on the desired outcomes, the composition of the slag, and the targeted applications. The goal is to extract valuable components, remove impurities, or utilize the slag in a manner that maximizes its economic and environmental benefits.

Results and Discussions

Results and discussions related to metallurgical-grade siliconrefined slag encompass the outcomes of processing techniques and the implications of utilizing the slag in various applications.

Elemental composition presenting the elemental composition of the metallurgical-grade silicon-refined slag through techniques such as X-ray fluorescence (XRF) or inductively coupled plasma (ICP) analysis [10]. This analysis provides insights into the presence of valuable components, impurities, and residual elements in the slag. Phase analysis identifying the mineral phases present in the slag through techniques such as X-ray diffraction (XRD) or scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDS). This analysis helps understand the potential applications and behavior of the slag. Recovery efficiency assessing the efficiency of chemical extraction methods, such as acid leaching or alkaline leaching, in recovering valuable components from the slag. This includes quantifying the recovery percentages of elements like silicon, aluminum, or trace elements. Impurity removal evaluating the effectiveness of magnetic separation, gravity separation, or other techniques in removing impurities, such as iron or other magnetic components, from the slag. Mechanical properties investigating the impact of incorporating metallurgical-grade silicon-refined slag into cement or construction materials on their mechanical properties, such as compressive strength, flexural strength, or durability.

Microstructural analysis examining the microstructure of the cementitious matrix or construction materials containing slag through microscopy techniques. This analysis provides insights into the hydration process, interfacial bonding, and potential improvements in material performance. Soil fertility enhancement assessing the impact of metallurgical-grade silicon-refined slag as a soil amendment on soil fertility parameters, such as pH, nutrient availability, or organic matter content [11]. This includes evaluating its effect on plant growth, yield, or nutrient uptake. Environmental impact investigating the potential environmental implications, such as leaching of elements or trace contaminants, associated with the utilization of slag in soil amendment.

Performance evaluation assessing the suitability and performance of metallurgical-grade silicon-refined slag in applications such as abrasives, insulation materials, or refractories. This includes evaluating properties such as hardness, thermal conductivity, or refractoriness. These results and discussions contribute to understanding the composition, behavior, and potential applications of metallurgicalgrade silicon-refined slag. They provide insights into the effectiveness of processing techniques in recovering valuable components and removing impurities. Furthermore, they address the implications and benefits of utilizing the slag in various applications, including cement production, construction materials, soil amendment, and other industrial applications.

The findings help guide further research and development in optimizing processing techniques, improving recovery efficiencies, and identifying new applications or value-added uses for metallurgicalgrade silicon-refined slag [12]. They also contribute to a comprehensive understanding of sustainable utilization options for industrial byproducts, promoting resource efficiency and environmental sustainability.

Conclusion

In conclusion, metallurgical-grade silicon-refined slag offers potential benefits and opportunities for resource utilization and environmental sustainability. The results and discussions surrounding this slag highlight its composition, behavior, and applications in various fields. Here are some key points to summarize:

Resource efficiency and environmental sustainability utilizing metallurgical-grade silicon-refined slag offers the potential for resource efficiency and reduces waste generation by converting a byproduct into a valuable resource. By incorporating the slag into various applications, environmental impacts can be minimized, promoting sustainable use of resources and waste reduction the study and utilization of metallurgical-grade silicon-refined slag contribute to sustainable resource management, waste reduction, and the development of valueadded applications. Continued research and development in processing techniques, characterization, and application-specific optimization can further enhance the utilization of this slag, ensuring its contribution to resource efficiency and environmental sustainability in various industries.

Acknowledgement

None

Conflict of Interest

None

1. Li Y, Ding Y, Munir K, Lin J, Brandt M, et al. (2019) Novel β-Ti35Zr28Nb alloy scaffolds manufactured using selective laser melting for bone implant applications. Acta Biomater 87: 273-284.

Indexed at, Google Scholar, CrossRef

2. Ran Q, Yang W, Hu Y, Shen X, Yu Y, et al. (2018) Osteogenesis of 3D printed porous Ti6Al4V implants with different pore sizes. J Mech Behav Biomed Mater 84: 1-11.

Indexed at, Google Scholar, CrossRef

3. Wang H, Su K, Su L, Liang P, Ji P, et al. (2019) Comparison of 3D-printed porous tantalum and titanium scaffolds on osteointegration and osteogenesis. Mater Sci Eng C Mater Biol Appl 104: 109908.

Indexed at, Google Scholar, CrossRef

4. Chang B, Song W, Han TX, Yan J, Li F, et al. (2016) Influence of pore size of porous titanium fabricated by vacuum diffusion bonding of titanium meshes on cell penetration and bone ingrowth. Acta Biomater 33: 311-321.

Indexed at, Google Scholar, CrossRef

5. Haugen HJ, Monjo M, Rubert M, Verket A, Lyngstadaas SP, et al. (2013) Porous ceramic titanium dioxide scaffolds promote bone formation in rabbit peri-implant cortical defect model. Acta Biomater 9: 5390-5399.

Indexed at, Google Scholar, CrossRef

6. Wauthle R, Johan VDS, Yavari SA, Humbeeck JV, Kruth JP, et al. (2015) Additively manufactured porous tantalum implants. Acta Biomater 14: 217-225.

Indexed at, Google Scholar, CrossRef

7. Li J, Li Z, Li R, Shi Y, Wang H, et al. (2018) In vitro and in vivo evaluations of mechanical properties, biocompatibility and osteogenic ability of sintered porous titanium alloy implant. RSC Adv 8: 36512-36520.

Indexed at, Google Scholar, CrossRef

8. Majumdar P, Singh SB, Chakraborty M (2011) The role of heat treatment on microstructure and mechanical properties of Ti-13Zr-13Nb alloy for biomedical load bearing applications. J Mech Behav Biomed Mater 4: 1132-1144.

Indexed at, Google Scholar, CrossRef

9. Lin DJ, Chuang CC, Lin JHC, Lee JW, Ju CP, et al. (2007) Bone formation at the surface of low modulus Ti-7.5Mo implants in rabbit femur. Biomaterials 28: 2582-2589.

Indexed at, Google Scholar, CrossRef

10. Yin B, Xue BJ, Wu ZH, Ma JG, Wang KM, et al. (2018) A novel hybrid 3D-printed titanium scaffold for osteogenesis in a rabbit calvarial defect model. Am J Trans Res 10: 474-482.

Indexed at, Google Scholar, CrossRef

11. Jing X, Mi HY, Wang XC, Peng XF, Turng LS, et al. (2015) Shish-kebab-structured poly(ε-caprolactone) nanofibers hierarchically decorated with chitosan-poly(ε-caprolactone) copolymers for bone tissue engineering. ACS Appl Mater Inter 7: 6955-6965.

Indexed at, Google Scholar, CrossRef

12. Vilardell AM, Cinca N, Garciagiralt N, Dosta S, Cano IG, et al. (2018) Functionalized coatings by cold spray: an in vitro study of micro- and nanocrystalline hydroxyapatite compared to porous titanium. Mater Sci Eng C 87: 41-49.

Indexed at, Google Scholar, CrossRef