To optimize Al2O3 content in high basicity CaO-SiO2-Al2O3-8%MgO-8%CaF2 slag (%CaO/%SiO2=6) used for the refining of heat-resistant austenitic stainless steel, effect on viscosity and ability was systematically investigated, relevant mechanism clarified based analyses solid phase precipitation behaviour ionic unit structure transformation. The results demonstrated that dramatically decreased mar...

Experimental work has been performed to investigate the precipitation mechanism of aluminum hydroxide phases from sodium aluminate/sodium carbonate pregnant solutions by carbon dioxide gas purging. Such result leaching calcium aluminate slags with solutions, in accordance Pedersen process, which is an alternative process for alumina production. The concentration ions solution revealed as a key ...

This study investigates a new concept of producing precipitated calcium carbonate (PCC) from steelmaking slag and carbon dioxide via a spray carbonation process. The presented laboratory-scale spray carbonation test reactor uses a spray nozzle to disperse fine droplets of a Ca-rich solution into a spray tower, where calcium carbonate precipitates as a result of the reaction between calcium and ...

The disposal of slag generated by the steel industry can have negative consequences upon the surrounding aquatic environment by the generation of high pH waters, leaching of potentially problematic trace metals, and rapid rates of calcite precipitation which smother benthic habitats. A 36-year dataset was collated from the long-term ambient monitoring of physicochemical parameters and elemental...