{"id":219723,"date":"2016-06-28T18:07:12","date_gmt":"2016-06-28T21:07:12","guid":{"rendered":"http:\/\/revistapesquisa.fapesp.br\/en\/?p=219723"},"modified":"2016-06-28T18:07:12","modified_gmt":"2016-06-28T21:07:12","slug":"mining-waste","status":"publish","type":"post","link":"https:\/\/revistapesquisa.fapesp.br\/en\/mining-waste\/","title":{"rendered":"Mining waste"},"content":{"rendered":"<div id=\"attachment_219724\" style=\"max-width: 300px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-219724\" src=\"http:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2016\/06\/Tecno_Casa-rejeito-2.jpg\" alt=\"Home built with waste material from iron ore mining, which would otherwise end up in a dam\" width=\"290\" height=\"218\" srcset=\"https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2016\/06\/Tecno_Casa-rejeito-2.jpg 290w, https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2016\/06\/Tecno_Casa-rejeito-2-120x90.jpg 120w, https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2016\/06\/Tecno_Casa-rejeito-2-250x188.jpg 250w\" sizes=\"auto, (max-width: 290px) 100vw, 290px\" \/><p class=\"wp-caption-text\"><span class=\"media-credits-inline\">UFMG<\/span>Home built with waste material from iron ore mining, which would otherwise end up in a dam<span class=\"media-credits\">UFMG<\/span><\/p><\/div>\n<p>Researchers from the Federal University of Minas Gerais (UFMG) presented proposals about what to do with waste rock like that which caused the accident at the Samarco-owned dam in Mariana, Minas Gerais \u2013 even before the environmental problem struck the region\u2019s residents and the Doce River. In 2015, prior to the environmental disaster, the researchers, led by professors Evandro da Gama and Abdias Gomes, successfully built a 46-square-meter house using products derived from iron ore waste rock and tailings.\u00a0 Waste rock is what remains after processing iron ore, while tailings are rocks that are associated with itabirite, the mineral that contains the ore. Both types of waste are held in dams. \u201cExcept for roofing tiles, glass, flooring, and doors, everything can be made from leftover mining material,\u201d says Gama. \u201cWe developed a calcination furnace called Flex, which calcinates the powder and transforms it into microparticles that will later be transformed into sand, blocks, beams, stone, and cement for construction purposes,\u201d the researcher explains. Gama coordinates the Geotechnologies and Geomaterials Laboratory at the UFMG\u2019s Center for Sustainable Production in Pedro Leopoldo, Minas Gerais. He guarantees that the large dams used to hold the waste products generated not only by iron ore mining but also in the mining of bauxite, gold, phosphate, and limestone would become unnecessary if waste rock and tailings were put to this use. Another advantage is that processing the waste material and then using it for construction purposes produces cooler homes whose walls absorb less water.<\/p>\n","protected":false},"excerpt":{"rendered":"UFMG researchers built a house with waste material from iron ore mining","protected":false},"author":475,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[168],"tags":[200,240,262],"coauthors":[785],"class_list":["post-219723","post","type-post","status-publish","format-standard","hentry","category-technoscience","tag-environment","tag-geology","tag-sustainability"],"acf":[],"_links":{"self":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/219723","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/users\/475"}],"replies":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/comments?post=219723"}],"version-history":[{"count":0,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/219723\/revisions"}],"wp:attachment":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/media?parent=219723"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/categories?post=219723"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/tags?post=219723"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/coauthors?post=219723"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}