Download 3rd International Symposium on High-Temperature by Tao Jiang, Jiann-Yang Hwang, Patrick Masset, Onuralp Yucel, PDF

By Tao Jiang, Jiann-Yang Hwang, Patrick Masset, Onuralp Yucel, Rafael Padilla, Guifeng Zhou

Proceedings of a symposium backed via the Pyrometallurgy Committee and the strength Committee of the Extraction and Processing department of TMS (The Minerals, Metals & fabrics Society)

Held throughout the TMS 2012 Annual assembly & Exhibition Orlando, Florida, USA
March 11-15, 2012

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Grade of sublimed sulfur used as reductant is above 99%. 75%). Table I. 15 ♦LOI: Loss on ignition. Figure 1. XRD Pattern of the Manganese Ore 26 Methods The ground manganese ore and chemically pure sublimed sulfur were put into a closed stainless steel reactor after mixed thoroughly together, and then roasted at given temperature for certain period in an electrically heated muffle furnace. The reduced samples were cooled in inert atmosphere. In each test, 10 grams reduced samples were weighed and leached in a 400ml beaker using a stirrer with rotating speed of 400 r-min"1.

1. In addition, the other equipments include XMB-67 type ball mill ( O200 mmx240mm), drum type low intensity magnetic separator and SHP high intensity magnetic separator, and so on. Fig. 1. 86KJ/mol (2) The key technological parameters influencing conversion degree of magnetite are roasting temperature, CO concentration and solid/gas ratio. 045mm and magnetic field intensity of 1500 Oe, Secondly, preconcentration tests were conducted on roasted ore obtained from the condition of optimal roasting technological parameters, and then grinding fineness tests and magnetic field intensity tests were implemented on rough concentrate from 51 preconcentration tests.

Further experiments with varying conditions can give insight about mechanisms behind emissions of NOx in Si and FeSi furnaces and how the industry can réduce these. The resulting NOx-values corresponding to the different air inlet to the furnace top, showed significantly differences between the different air inlet geometries. The experimental set up and the hood design was suitable in order to make a controlled off gas study within a fixed geometry. Based on the data acquired from our experiment we can conclude the following for the pilot scale silicon furnace: - Having the inlet of cold air close to the charge surface produces more NOx than moving it higher towards the off gas channel.

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