Use of Linear Alkylbenzene Sulfonate (Las) and Polycarboxylate-Ether (Pce) as Reagents in Iron Ore Flotation

Abstract

Flotation is one of the separation techniques that has been used by the mineral industry and its importance has increased due to its better performance in the concentration of low grade ores. Specific chemical reagents are used in flotation in order to promote the hydrophobicity control of minerals dispersed in a pulp, among them, surfactants have been studied with good results. In this study, a substance based on Linear Alkylbenzene Solfonate (LAS), and a concrete admixture based on Policarboxilate--ether (PCE) were tested as reagents in iron ore flotation. The tests were performed in a friable hematite sample, using the microflotation technique. The Yates complete replicated factorial method for three variables and two levels was used in experimental planning. The variables evaluated was pH (9--11); LAS content (1000--5000 g/cm³); and PCE content (100--1000 g/cm³). The best result (84.1% floated) was obtained for combination pH=9, LAS content = 5000 g/cm³ and PCE content = 100 g/cm³

Development of High-Performance Fiber Cement: A Case Study in the Integration of Circular Economy in Product Design

“…Sodium thiocyanate can improve the early rate of the hydration reaction in Portland cement [28]. Alkylbenzene sulfonate is the bio-degradable surfactant normally used in cleansing products and the air-entraining agent for cement-based composite materials [29,30]. Although hydrochloric acid can attack cement-based materials by reacting with calcium hydroxide [31][32][33], it was found that hydrochloric acid could be used to improve the pozzolanic reactivity of the waste such as agricultural waste [34].…”

“…The LS enhances the freeze-thaw resistance by forming micro and mesopores which prevent the freezing of water within these pores due to the limited space [27]. The ABS is an air-entraining agent for the forming of microscopic pores that can improve the freeze-thaw resistance of cement-based composite materials [30]. In addition, according to Wise et al [28], besides being an accelerator for the hydration reaction at low temperatures, the addition of NaSCN into the cement-based material could prevent the freezing of water within the microstructure as well.…”