STET: : Beyond fly ash

• Autores: Kasia Patel
• Localización: Industrial Minerals, ISSN 0019-8544, Nº. 587, 2016 (Ejemplar dedicado a: Octubre)
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • "For many years fly ash had been a really good material as a cement replacement, so the utility companies got used to not only recycling their ash this way but also generating some revenue as a valuable byproduct," he told IM. "But when these regulations kicked in and the carbon content rose, all of a sudden a lot of ash couldn't be used in concrete anymore and had to be landfilled, so the utilities were very interested in finding a solution." "People have worked with flotation processes, however it's extremely difficult and costly as well as generating significant waste streams," [Frank Hrach] told IM. "There's also competitive burnout technologies which are significantly more expensive and generate air emissions, which we don't." "One thing I can tell you is that we haven't really gone after all the minerals," Paul Miranda, STET's chief metallurgist, told IM. "There are a lot of minerals out there that we're still looking to see if the technology will separate. If we can find one or two that we know we can just get on board I think it will really help. I believe we will have some more minerals we will be able to beneficiate and separate for the customer."