摘要:
Supports for power transmission lines are made of inductively transparent, inorganic cement composite materials. Separate parts of the structure are provided with mating surfaces and are secured together by expanding grout. When the structure is in the form of a pole, the bottom of the pole can be attached to a base by sleeves secured to the pole.
摘要:
A cement-containing composition, and in particular to a sand free composition employing effective amounts of cement, a superplasticizer, a metakaolin clay, an acrylic based co-polymer, and water, and which is especially adapted for use in manufacturing poles.
摘要:
A fiber composite article is wound on a mandrel in a vertical orientation to ensure even tension in the fibers. Composite material is preferably glass fibers and cement. The fibers are applied by an assembly that moves in vertical and horizontal directions and the cement may be applied to the fibers before they are wound. After the fibers and cement are applied to the mandrel, the article is vibrated to allow escape of air and to ensure even coating of the fibers. The apparatus for vibrating the wound article includes a flexible sleeve that surrounds the article and moves vertically to apply a vibrating radial compacting force. The article may then be wound with tape to compress the applied glass fibers and cement prevent the loss of water during curing. A compressible sock is placed on the mandrel between the mandrel and the article for easier removal of the article.
摘要:
A ladle (2) or other container for molten metal (5) is provided with an outlet nozzle (4) that allows a stream of molten metal to flow by heating the nozzle (4) to the melting temperature of the metal (5). The nozzle (4) is, for example, tubular and made of AI2O3 or SiO2 and is surrounded by a graphite tube (8) in thermal contact with the nozzle (4). The nozzle (4) is heated by heating the surrounding graphite tube (S) inductively. Once the temperature of the nozzle (4) exceeds the liquidus temperature of the metal (5) in the ladle (2), the metal (5) will flow out of the ladle (2) through the nozzle (4).
摘要翻译:用于熔融金属(5)的浇包(2)或其他容器设置有出口喷嘴(4),其允许熔融金属流通过将喷嘴(4)加热至金属(5)的熔融温度而流动。 喷嘴(4)例如是管状并由Al 2 O 3或SiO 2制成,并被与喷嘴(4)热接触的石墨管(8)包围。 通过感应地加热周围的石墨管(S)来加热喷嘴(4)。 一旦喷嘴(4)的温度超过钢包(2)中的金属(5)的液相线温度,金属(5)将通过喷嘴(4)流出钢包(2)。
摘要:
A cement-containing composition, and in particular to a sand free composition employing effective amounts of cement, a superplasticizer, a metakaolin clay, an acrylic based co-polymer, and water, and which is especially adapted for use in manufacturing poles.
摘要:
An article and method for its manufacture are described. The article is preferably a ladle used in the manufacture of metals and receives molten metal for further chemical processing in the ladle or for transportation. The ladle is transparent to a wide range of electromagnetic radiation wavelengths which allows the metal to be heated or stirred by induction without heating the ladle itself. The ladle is made of glass fibers and an inorganic cement, and this provides strength along with high temperature resistance. The article is manufactured by winding glass fiber around a mandrel, the glass fiber having an inorganic cement adhered to it. In one technique, the cement is provided on the fiber as an aqueous slurry, and the product is allowed to air cure after winding. In a second technique, the cement is adhered to the fiber by electrostatic attraction. After winding is complete, additional cement may be added, the product is placed in an autoclave supplied with steam whereby the cement takes up water, and it is then allowed to cure. After the product is cured, it is preferably sawed into two pieces to form two inductively transparent ladles.
摘要:
An article and method for its manufacture are described. The article is preferably a ladle used in the manufacture of metals and receives molten metal for further chemical processing in the ladle or for transportation. the ladle is transparent to a wide range of electromagnetic radiation wavelengths which allows the metal to be heated or stirred by induction without heating the ladle itself. The ladle is made of glass fibers and an inorganic cement, and this provides strength along with high temperature resistance. The article is manufactured by winding glass fiber around a mandrel, the glass fiber having an inorganic cement adhered to it. In one technique, the cement is provided on the fiber as an aqueous slurry, and the product is allowed to air cure after winding. In a second technique, the cement is adhered to the fiber by electrostatic attraction. After winding is complete, additional cement may be added, the product is placed in an autoclave supplied with steam whereby the cement takes up water, and it is then allowed to cure. After the product is cured, it is preferably sawed into two pieces to form two inductively transparent ladles.