Fundamental aspects of sintering of chromites concentrates

Autor:	Martim Hideki Nakayama Kurauchi, Anderson Santana da Silva, Marcelo Gualberto Rocha, Marcelo Breda Mourão, Cyro Takano
Rok vydání:	2014
Předmět:	Materials science Metallurgy Sintering Slag General Chemistry Liquidus Solidus Geotechnical Engineering and Engineering Geology Geochemistry and Petrology visual_art visual_art.visual_art_medium Gangue Chromite Particle size Dissolution
Zdroj:	Mineral Processing and Extractive Metallurgy. 123:251-256
ISSN:	1743-2855 0371-9553
Popis:	Brazilian chromite ores need to be crushed to a size below 1 mm to allow concentrations that decrease the content of gangues. The concentrate particle size distributions therefore are not favourable for sintering. The chromite concentrates are mainly composed of chromite grains and gangues of magnesium silicates. Because of its refractoriness and low rate of dissolution in gangue, the chromite minerals participation in liquid phase formation during the sintering process is low, and the gangue also shows a solidus temperature of ∼1400°C. This paper attempts to analyse these fundamental aspects by characterising chromites, with estimates of the liquidus temperatures of chromite grains and gangue. To improve permeability, fines of lump ore (not concentrate) were added to the charging sintering mixture, and some slag forming agent was also added to facilitate the liquid phase formation. With these changes, the results of the industrial runs demonstrated improved sintering yields.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6e118820fee1cc0f876a8d2a9e0001c8 https://doi.org/10.1179/1743285514y.0000000080 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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