Apparatus for obtaining silicon from fluosilicic acid

Details Apparatus for obtaining silicon from fluosilicic acid Apparatus for obtaining silicon from fluosilicic acid

1986-03-03

1988-11-01

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

Stock pressurizing means operably associated with downstream...

Including heating or cooling means

164418, 164437, 164441, 164443, 422199, 422241, 423350, B29C 3914, B29C 4700

Patent

active

047815655

ABSTRACT:
Apparatus for producing low cost, high purity solar grade Si wherein a reduction reaction, preferably the reduction of SiF.sub.4, by an alkali metal (Na preferred) is carried out by jetting a spray of reactants into a reaction chamber at a rate and temperature which causes the reaction to take place far enough away from the entry region to avoid plugging of reactants at the entry region and wherein separation in the melt is carried out continuously from the reaction and the Si can be cast directly from the melt. The melt separation is provided by openings in the reaction chamber wall between about 2 to about 3.5 millimeters in width. The Si is retained within the reaction chamber due to its surface tension.

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