Recent progress of efficient utilization of titanium-bearing blast furnace slag

Abstract

Titanium-bearing blast furnace slag (BFS) has valuable compositions and potential environmental hazardousness. Thus, developing efficient and green approaches to utilize BFS is highly desired for resource economization and environmental protection. In the past decades, many attempts have been adopted to reuse BFS efficiently, and significant advances in understanding the fundamental features and the development of efficient approaches have been achieved. This review provides a comprehensive overview of the latest progress on the efficient utilization of BFS and discusses the mechanism and characteristics of various approaches, along with their application prospects. In particular, the extraction and enrichment of titanium-bearing phases from BFS are highlighted because of the high availability of titanium resources. This systemic and comprehensive review may benefit the design of new and green utilization routes with high efficiency and low cost.

Preparation of micro‐crystal stones from molten titanium slag by “one‐step” cooling method

“…12 Due to the preciousness of titanium resources, most of the high-titanium contained slag is treated by titanium extraction or preparation of titanium alloys. 13,14 The results of some studies have shown that when the content of TiO 2 in slag is greater than 4 wt%, the activity and strength of cement will be significantly reduced. Hence, almost all low-titanium contained slag can be used as ordinary BFS in construction materials without special processing.…”

A Porous Geopolymer Containing Ti-Bearing Blast Furnace Slag: Synthesis, Characterization, and Adsorption-Photodegradation Studies towards Methylene Blue Removal under Visible Light Condition

“…Over 3-million tons of Ti-bearing blast furnace slag (TBBFS) are generated annually when vanadium-titanium magnetite is melted for iron production [2,3]. The inappropriate disposal of TBBFS cannot only be hazardous to the environment but also lead to a potential waste of titanium resources [4]. Recently, the conversion of TBBFS into photocatalytic materials (TiO 2 , CaTiO 3 ) has garnered significant attention and can be achieved through alkali fusion and acid leaching [5,6].…”

“…TBBFS has the advantage of high Ti content and utilizes Ti components. Previous studies have proven that implementing slag modification combined with selective crystallization allows for the enrichment of Ti in the form of a perovskite phase, while the remaining components exist in an amorphous state [4,17]. Based on this, we proposed a facile and straightforward methodology for manufacturing photocatalytic porous geopolymers from TBBFS.…”

Thermodynamics analysis and experiments on Ti-bearing blast furnace slag leaching enhanced by sulfuric acid roasting

“…The main purpose of hydrometallurgy for Ti-bearing blast furnace slag is the separation of valuable metals. 20 Therefore, in hydrometallurgy, the key is for the target components to dissolve as much as possible in the solution. For air-cooled slag, the high crystallization degree makes it difficult for most metals to dissolve, and theoretical research on the leaching process is relatively poor.…”