Phosphorus recovery from phosphate tailings through a two-stage leaching-precipitation process: Toward the harmless and reduction treatment of P-bearing wastes.

To achieve highly efficient extraction of phosphorus (P) and comprehensive utilization of phosphate tailings, a two-stage leaching-precipitation method was proposed. Phosphate tailings primarily consisted of dolomite, fluorapatite, and quartz. During the first-stage leaching, the large majority of dolomite was selectively dissolved and the leaching efficiency of Mg reached 93.

Leaching of phosphorus from phosphate tailings and extraction of calcium phosphates: Toward comprehensive utilization of tailing resources.

Phosphate tailing is an extremely fine by-product during phosphate ore flotation. Due to the large quantities and relatively higher PO content, the phosphate tailings have been considered as a potential P resource, compared to other P-bearing wastes. Besides, phosphate tailings also contain a large amount of available components, such as Ca, Mg, and Si.

A review on the P enrichment and recovery from steelmaking slag: Towards a sustainable P supply and comprehensive utilization of industrial solid wastes.

Phosphorus (P) is one of the desirable nutrient elements for the growing of crops and is a non-renewable resource. The over-exploitation of high-grade phosphate rocks makes finding alternative P sources urgent for a sustainable and stable P supply. Steelmaking slag has been considered a potential P source due to its huge production and the increasing P content in slag with the utilization of low-grade iron ores.

Recovery of high-quality phosphate from steelmaking slag by a hydrometallurgical process.

Phosphorus recovery from wastes has become a worldwide concern. The P-bearing steelmaking slag generated from steel plant is considered a potential phosphorus source. In this study, a novel process of selective leaching-precipitation-alkaline wash was proposed to recover high-quality phosphate from steelmaking slag.