International plant supplier SMS Siemag has successfully commissioned two submerged arc furnaces (SAFs) for the production of silicon metal at Chinese manufacturer of metallurgical silicon China Bluestar International Chemicals.
In mid-2008, SMS Siemag was awarded the contract for the supply of the SAF for the production of silicon metal at the Yongdeng works, in Gansu, China.
The scope of supply includes the basic engineering for a new production plant and its ancillary units, the layout, design and supply of six electrode columns, the high-current line made of copper and the hydraulic system. SMS Siemag assisted with the installation and metallurgical commissioning.
Besides the production to 20 000 t of silicon a year, this plant will supply more than 9 000 t/y of fine silicon dioxide dust as a valuable raw material for cement manufacturing.
SMS Siemag had already successfully modernised two silicon-metal furnaces at the same location in 2004.
China Bluestar International Chemi-cals also processes metallurgical silicon into material for the semi-conductors industry. The process involves the conversion of quartz into silicon using carbon in the SAF.
Commissioning Meanwhile, in January this year, SMS Siemag, in Ger- many, successfully commis-sioned the first of two new carbon-steel converters at the Taichung works of steel fabrication company Dragon Steel Corporation, in Taiwan.
The second converter is scheduled to be commis-sioned later this year.
With both converters oper-ating, the meltshop is rated for a yearly production
of 2,2-million tons.
The 230-t converter is equipped with a lamella sus-pension system, bottom stirring equipment and a robot-operated sublance. Apart from the two converters, SMS Siemag’s supply includes the complete bin system for ferroalloys, the gas cleaning plant with primary dedusting unit, as well as the gas recovery system, all vehicles, ladles and slag pots.
Also included in SMS Siemag’s package is the basic engineering for the concrete structure and the basic and detail engineering as well as the supply of the structural steelwork.
Also successfully com-missioned were an RH-TOP unit from the SMS Mevac division of SMS Siemag, in Essen, Germany. This facility is used especially for the treatment of special steel grades for the automotive industry and for transformer steels.
Also, Mining Weekly reported in February that the company has also successfully put into operation a 30-MW descending current furnace for the production of titanium oxide slag at China’s nonferrous metals producer Yunnan Xinli Nonferrous Metals.
The scope of supply included the basic and detail engineering for the
furnace, the cooling and instrumentation.