Beneficiation of High‐Phosphorus Siderite Ore by Acid Leaching and Alkaline Oxide Reinforced Carbothermic Reduction‐Magnetic Separation Process

Abstract

(1 of 4) 1770063 Cover Photo: The cover image shows an as-cast miniature slab of AISI 304 austenitic stainless steel microalloyed with 100 ppm Ti and 35 ppm B with physical dimensions of 300 450 50 mm. The slab has just been taken out of the mold it was cast in a vacuum induction oven. Further preparation of samples from the miniature slabs and the following scale formation research can be found in the article 1600365 by Timo Fabritius and co-workers. 1600314 The combination of an intercritical annealing process with a quenching and partitioning process allows to adapt the mechanical properties of the low-alloyed steel 22MnB5. The heating in the two-phase region allows customizing the ferrite-austenite ratio and to achieve an increased alloy concentration in the austenite. Due to an interrupted quenching and overaging the martensite is tempered in the TRIP-assisted steel. This paper provides a method for benefi ciation of high-phosphorus siderite ore. A combined metallurgy process is developed, which includes dephosphorization using H 2 SO 4 leaching at low concentration, reinforces carbothermic reduction with alkaline oxide additives (Na 2 CO 3 and CaO) and magnetic separation process. An iron concentrate has a high metallic iron content and a low content of harmful impurities, which can be used as a raw material for iron-making.

Gasification Behavior of Phosphorus during Biomass Sintering of High-phosphorus Iron Ore

“…11,12) Chemical treatment combined with reverse flotation process to treat high phosphorus iron ore could realize the removal of phosphorus element, but the enrichment degree of the iron element was very limited, and produce a large amount of sewage, which was not conducive to environmental protection. [13][14][15] At present, due to the lack of effective iron extraction and dephosphorization process, there had been no comprehensive utilization of high phosphate iron ore in China.…”

Increasing Iron and Reducing Phosphorus Grades of Magnetic-Roasted High-Phosphorus Oolitic Iron Ore by Low-Intensity Magnetic Separation–Reverse Flotation

“…Increased dosage of the collector during a flotation process can improve recovery, but excessive dosage can easily target other minerals and affect the grade of the concentrate [16][17][18][19]. Appropriate collector dosage is not only beneficial to improving the flotation index, but also plays a key role in the regulation of operating costs.…”

Desulfurization of Iron Ores: Processes and Challenges

“…To enable maximum desulfurization and in parallel, other impurities removal from the ore, it is necessary to carefully adjust these parameters by adding flotation collector, frother, and modifier. The presence of some specific impurities other than sulfur in iron ore, such as alumina or silica and phosphorous containing minerals, has destructive effect on quality of iron ore produced and attracts attentions for the simultaneous removal of sulfur and gangue minerals, and hence various reagents and a combination of these reagents are still being developed for simultaneous sulfur minerals and impurities removal from iron ore …”