Nippon Steel Corporation

Ryuji Watanabe

Hirobumi Maede

Masami Wajima

Einao Anzai

Jiro Kondo

Shinji Tokumaru

Haruo Shimada

Akihito Kiyose

Atsushi Nogami

It is possible to produce high purity Si by heating solid SiO at a temperature of at least 1000&deg; C. and lower than 1730&deg; C., for a disproportionation reaction in which the SiO solid is decomposed to liquid or solid Si and solid SiO , and the produced Si is separated from the SiO and/or SiO. The SiO solid can be obtained by a process whereby a starting mixture of carbon C, silicon Si or ferrosilicon, or a combination thereof, with SiO is heated to generate SiO gas-containing gas, and the SiO-containing gas is cooled to produce SiO solid.

Production process and apparatus for high purity silicon

A method of manufacturing strips, bars and wire rods comprises continuously supplying molten metal into an open-top endless casting groove on an annular mold that is rotated around a vertical shaft, cooling the molten metal in the casting groove from outside by forcibly cooling the annular mold, and continuously taking out the cast section from the casting groove at a point where a solidified shell has been formed throughout the entire circumference of the molten metal in the casting groove. A roll is provided upstream of the take-out point to depress the top surface of the cast section, thereby keeping the cast section in close contact with the surface of the casting groove. The cast section then slides diagonally upward over a surface inclined at an angle of 5 to 60 degrees that is provided on the exit side of the above roll in the casting groove. The annular mold may also have two or more concentrically disposed casting grooves to permit multi-strand casting of molten metal poured into the individual casting grooves. A multiple of sections thus simultaneously cast are then simultaneously rolled into finished products.

Apparatus for making strips, bars and wire rods

Method and apparatus for making strips, bars and wire rods

Growing community of inventors

Muroran, Japan

Ryuji Watanabe