NOVELTY - The carbo-thermic reduction method for extracting silicon product from quartz and carbon in a crucible (30), comprises mixing several reaction gases or a mixture of several reaction gases to a feed gas in temporarily shifted manner, and then supplying to a material mixture (36) present in the crucible during the carbo-thermic reduction, so that it causes thorough mixing of the material mixture. The inert gas is used as the feed gas. The reaction gases react with impurities present in the quartz or the carbon in such a manner that the impurities are transferred into a gaseous composition.    USE - Carbo-thermic reduction method for extracting silicon product (claimed) useful for the production of electronic devices, electronic components and solar cells.    ADVANTAGE - The method ensures economical and efficient extraction of silicon product with 100% purity, high throughput and less-energy consumption in less-time consuming manner.    DETAILED DESCRIPTION - The carbo-thermic reduction method for extracting silicon product from quartz and carbon in a crucible (30), comprises mixing several reaction gases or a mixture of several reaction gases to a feed gas in temporarily shifted manner, and then supplying to a material mixture (36) present in the crucible during the carbo-thermic reduction, so that it causes thorough mixing of the material mixture. The inert gas is used as the feed gas. The reaction gases react with impurities present in the quartz or the carbon in such a manner that the impurities are transferred into a gaseous composition by a chemical oxidation or a thermal reaction. An inert gas flow (38) is formed over a crucible opening (29) and formed under using the inert gas. The inert gas and the reaction gases are supplied over immersion lances (32a, 32b) and/or a spongy structure in a crucible wall. The gases forming the inert gas flow and/or the gaseous composition are sucked off and then supplied to a condensation trap. The gases forming the inert gas flow are partially separated from the seized gaseous composition and/or seized particles and are reused in the inert gas flow. Material flows are formed in the crucible by supplying the inert gas in the material mixture. The inert gas is supplied to the material mixture at different places and/or is delivered into the material mixture in different directions for the formation of the local material flows in the crucible. The different material flows are formed in temporal sequence. An INDEPENDENT CLAIM is included for a device for extracting silicon product from quartz and carbon in a crucible by carbo-thermic reduction.    DESCRIPTION OF DRAWING(S) - The diagram shows a device for extracting silicon product from quartz and carbon in a crucible by carbo-thermic reduction.    Crucible opening (29)    Crucible (30)    Immersion lances (32a, 32b)    Material mixture (36)    Inert gas flow. (38)