new carbon-containing raw material and production of silicon |
| 03-08 09:07:51 来源： 作者： |
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new carbon-containing raw material and production of silicon Inquiry (采购产品): new carbon-containing raw material and production of silicon carbide Joint Stock Company INVESTMENT AND INDUSTRY TEVA – SCHUNGITE Dear Sirs, Our Company possessing sufficiently large resources of a unique natural mineral schungite (the sole explored deposit in the world, located in Carelia, Russia) proposes to consider the possibility of its joint effective mobilizatin, utilization and development on the basis of high technologies. Schungite contains amorphous non-graphitizing carbon, which is very active in redox processes and physicochemical interactions and forms a matrix structurized by uniformly spread finely divided (less than 1 mkm) silica particles. Due to such a structure the schungite has high electric conductivity, highly developed contact surface between carbon and silicates. This sructure allows to obtain superfine powders the particles whereof posess bipolar properties suitable for application in various physicochemical processes. We have to do with a specific deposit of a total reserve of about 30 mln. tons. This deposit presents a unique type of raw material distinguished by high purity and silicon-carbon relation close to the stoichiometry relation, 30% to 60%; metal oxides comprised in the minaral pose no major problems in schungite application. The amount of schungite is practically solid ore body with thickness of the layer of 30-40 m. Extraction may be performed in an open way as thickness of the overburden is only 3-4 meters. It is necessary to emphasize, that the overburden is excellent dolomite, which, by preliminary estimation, is about 100 million tons. This material is suitable both for manufacturing of building materials, and for agriculture (a dolomitic flour). Dolomite is also used in large-tonnage chemistry. Works with schungite on laboratory and industrial levels showed its surprisingly diverse usuful properties and allowed to design some unique basic technologies which frequently define entirely new practical trends. The following properties of schungite should be highlighted: 1. High carbon reactivity. 2. Possibility of solid phase interaction of carbon and silicon at heating and obtaining therewith high value products. 3. High miscibility with all binders and many plastic materials which imparts new useful properties thereto. 4. High electric conductivity, thermal stability, resistance to attack by corrosive media, density, rigidity. 5. High sorption capacity for a great number of organic substances. 6. High filtration capacity. Schungite is readily amenable to simple regeneration like filter and in this case only improves its filtration properties. 7. Schungite is bactericidal, articles with schungite provide protection from ionizing radiation and electromagnetic fields; particilarly, schungite may be used for protection against unsactioned elecronic interference. 8. Schungite is active filler for composite materials of special electrophilic paints, films, as well as a highly efficient parting material. Posessing superhigh adhesive properties, schungite may be used as an anticorrosive material. 9. There have been developed technologies for producing new rubber types, rubber articles, other elastomeric compositions, as well as motor tyres with entirely new properies; schungite is also suitable for manufacturing hard, heat resistant, resistant to attack by corrosive media, sheaths, braidings, seals etc. 10. It may be further used for producing electroconductive concretes, asphalts, polymers, superhard and special rubbers, friction units and special packings. Schungite also essentially reduces the viscosity of polymers improving and facilitating the technology of producing new composites. 11. What deserves particular attention is the possibility of using schungite in ore roasting processes which impose special requrements on the contents and relation of silica and free carbon. On the basis of the unique (close to the stoichiometric one) relation of carbon and silica there have been designed technologies for replacing coke by schungite. This provides not only economic and echologic advantages, but also allows obtaining a metal with new properties. In particular, on the basis of schungite, there have been designed technologies for producing cast iron, ferrowalloys, elementary phosphorus, silicon carbie and nitride of special purity and structure, unique constructional materials on the basis thereof. 12. The reduction of silica to metal silicon is possible. 13. Schungite may also be the basis for producing new ceramic compositions for ore roasting and other metallurgic processes, as well as for protection of aluminim electrolyzers. 14. The high capability of schungite for modification allows obtaining improvers of metallurgic charge for melting alloy steels. 15. Schungite has high catalitic properties in numerous chemical processes; in particular, unique electric filters for purification of galvanic waste have been developed on the basis thereof. 16. There has been gained positive results of using schungite in agriculture. It turned out to be an effective soil structure improver. It is also effective as a premix. So we can conclude that schungite is a multi-purpose raw material and, in particular, a substitution for rather expensive and scarce carbon-containing materials produced from oil, gas, slates, graphites and the certain grades of coal. The turnover of carbon-containing materials in Russia is about 15 million tons., that makes less than 1% of the world consumption of the carbon-containing materials. Products and materials which can be manufactured from schungite are required for ferrous and non-ferrous metallurgy, aluminium industry, for production of refractory materials and, in particular, silicon carbide, for the production of abrasives, rubbers and plastic fillers, sorbents and other valuable composites. We have listed only those directions of usage of schungite which make huge volumes: hundred thousands and millions of tons. The practice of system extraction and usage of schungite (20 years operational experience of the only deposit working in the neighborhood; volume of extraction is 120 000 tons) has shown high perspectivity of its application and is the effective model extremely valuable to correction of strategy and tactics of development of our deposit, our business. The total amount of stocks of schungite in Karelia makes more than a billion ton. Stocks convenient for the development, - make about 800-900 million tons. If we convert our stocks of schungite in amount of 30 million tons into such product as silicon carbide, the quantity of the finished product can make some millions of tons (up to 10). Its total cost will make more than 10 billion USD. We suppose that you’re aware of the prices for silicon carbide, depending on it’s quality. Cost of one extracted ton of schungite (without transportation and processing) makes 70 USD. Ways of transportation of raw material and products are convenient enough, mainly – waterage. The outlook for the appropriate processing factories is also excellent, for the company has an industrial platform which is about 15 000 m2. Good power prospects are also available. The big amount of information and knowledge about schungite has allowed to develop various directions of usage of this mineral, however scales of use and scales of technological decisions leave much to be desired. Industrial technological decisions obviously lag behind scales of the potential market In our opinion, it is connected with the deficiency of system efforts, financial problems and weak awareness of the global players on the world market of carbon-containing raw materials and products of schungite. We are ready to consider any offers regarding strategical partnership Prof. Lazar E. NEMIROVSKY, Research Manager nemirov-shungit@mail.ru **** Hidden Message ***** Lazar NEMIROVSKY 121099 RUS Company: TEVA – SCHUNGITE Title: Research Manager E-mail: nemirov-shungit@mail.ru **** Hidden Message ***** nemirov-shungit@mail.ru |
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