Flotation Separation of Dolomite from Fluorapatite Using Sodium Dodecyl Benzene Sulfonate as the Efficient Collector under Low Temperature

Abstract

Flotation is the most often employed process to achieve the selective removal of contaminants from the raw materials used in the manufacturing of phosphate fertilizer. However, sodium oleate (NaOL), as a typical collector, is ineffective because of its low collecting ability under low temperature. As a result, developing and implementing feasible alternatives is critical for the long-term output of mines. In this study, sodium dodecyl benzene sulfonate (SDBS), a low-cost and freely soluble reagent under low temperature was used to examine its collecting ability and selectivity in a fluorapatite-dolomite system by means of single and artificially mixed minerals flotation. The adsorption mechanism was evaluated with the help of XPS analyses. The flotation results demonstrate that SDBS could float both fluorapatite and dolomite, but show a higher affinity towards fluorapatite instead of dolomite. Moreover, SDBS could preferred adsorb onto fluorapatite surface when fluorapatite and dolomite coexist. SDBS is more suitable than NaOL for satisfactory recovery of fluorapatite under low temperature in terms of the higher recovery obtained. The XPS analyses results demonstrate that the adsorption of SDBS on fluorapatite surface was more intensively as opposed to that on dolomite surface and Ca active sites on fluorapatite surface are supposed to be the main location for SDBS attachment.

Sodium N-Lauroylsarcosinate (SNLS) as a Selective Collector for Calcareous Phosphate Beneficiation

“…Thus, it is considered an eco-friendly and strong depressant for dolomite. Due to its limited ability to aggregate and low separation efficiency [15,16], in recent years, many studies have been conducted to improve the separation efficiency of apatite from carbonate minerals; and it has been reported that sodium dodecyl benzene sulfonate (SDBS) has a significant collector impact on apatite flotation, but has no effect on dolomite adsorption characteristics. SDBS was discovered to interact with Ca active sites on the apatite surface through chemical bonding.…”

Influence of measuring process properties on phosphate rock slurry rheology based on Brookfield method

“…Flotation is divided into positive flotation and reverse flotation. Usually, direct flotation with anionic collectors and reverse flotation with cationic collectors are used to remove gangue minerals in phosphate rock (Zheng et al, 2022). Both positive flotation and reverse flotation are suitable for silicatecontaining gangue minerals, while carbonate-containing gangue minerals are more suitable for reverse flotation.…”