Faria, Geraldo Lúcio deTenório, Jorge Alberto SoaresJannotti Júnior, NelsonAraújo, Fernando Gabriel da Silva2015-03-252015-03-252013FARIA, G. L. de et al. Disintegration on heating of a Brazilian manganese lump ore. International Journal of Mineral Processing, v. 124, p. 132-137, 2013. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0301751613001440>. Acesso em: 13 fev. 2015.0301-7516http://www.repositorio.ufop.br/handle/123456789/4738This pioneering study characterized the chemical, physical and mineralogical aspects of the Urucum Standard manganese ore typology, and evaluated some of its metallurgical characteristics, such as the main mineral heat decompositions, and the particle disintegration at room temperature and under continuous heating. A one-ton sample of ore was received, homogenized and quartered. Representative samples were collected and characterized with the aid of techniques, such as ICP-AES, XRD, SEM-EDS, BET and OM. Representative samples with particle sizes between 9.5 mm and 15.9 mm were separated to perform tumbling tests at room temperature, and thermogravimetry tests for both air and nitrogen constant flow at different temperatures. After each heating cycle, the mechanical strength of the orewas evaluated by means of screening and tumbling procedures. The Urucum Standard typology was classified as an oxidized anhydrous ore, with a high manganese content (~47%). This typology ismainly composed of cryptomelane and pyrolusite; however there is a significantamount of hematite. The Urucum Standard particles presented low susceptibility to disintegration at room temperature, but as temperature increased, susceptibility increased. No significant differences were observed between the tests done with the air or nitrogen injections.en-USManganese oreHeat decomposicionParticle size disintegrationFine generationDisintegration on heating of a Brazilian manganese lump ore.Artigo publicado em periodicoO periódico International Journal of Mineral Processing concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3566050708707.https://doi.org/10.1016/j.minpro.2013.06.008