By Tao Jiang, Jiann-Yang Hwang, Patrick Masset, Onuralp Yucel, Rafael Padilla, Guifeng Zhou
Proceedings of a symposium subsidized through the Pyrometallurgy Committee and the strength Committee of the Extraction and Processing department of TMS (The Minerals, Metals & fabrics Society)
Held through the TMS 2012 Annual assembly & Exhibition Orlando, Florida, USA
March 11-15, 2012
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Extra resources for 3rd International Symposium on High-Temperature Metallurgical Processing
The furnace hood has regulation and control of the air inlet into the combustion zone in two different heights. The off gas temperature and composition was continuously monitored and analyzed during the experiment. In order to expand the knowledge on NOx-formation in silicon metal production, such information is vital, Introduction Because of the negative environmental impact, the attention towards all kinds of NOx emissions increases in Norway. The authorities' demand towards better surveillance and control of emissions increases as well.
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. Finally, process flow tests were conducted on the basis of above conditioning tests.
The resulting NOx-values corresponding to the different air inlet to the furnace top, showed significantly differences between the different air inlet geometries. Furnace The experiment was carried out in a 400 kVA furnace operated at 160 kW. It is single phase furnace with adjustable current and voltage supply. The power supply can be operated with both AC and DC. Maximum DC current is 8000 A and maximum DC voltage is 300 V. Maximum AC current is 5700A and maximum AC voltage is 215 V. In this case AC was chosen.
3rd International Symposium on High-Temperature Metallurgical Processing by Tao Jiang, Jiann-Yang Hwang, Patrick Masset, Onuralp Yucel, Rafael Padilla, Guifeng Zhou