Improvements in or relating to the Manufacture of Retort or Furnace Tubes or Chambers for Gaseous Reactions at High Temperatures.

摘要

15,379. Pictet, R. P. July 3. Pottery; pottery materials. - Retort or furnace tubes or chambers are made from a paste which is prepared from powders of highly-refractory materials mixed with chemically prepared carbon obtained in atomic or molecular condition by the dissociation of hydrocarbons or carbonaceous material. The materials are mixed with a suitable liquid and moulded into the desired form, for instance in an hydraulic extrusion press, and the tubes or chambers so formed are fired in a reverberatory furnace, heated by water-gas and oxygenated air, at a temperature sufficient to soften the paste, but not as high as to produce deformation; or they may be heated by an electric current passed through them. The refractory material may consist of finely powdered silica, magnesia, alumina, lime, carborundum, or calcium carbide, and the carbon may be obtained by the dissociation of methane (CH4). About 30 per cent of carbon is a suitable amount. The liquid used for making the paste may be alcohol, chloroform, petroleum, or water. Tubes or chambers so produced are especially suitable for use in furnaces for the production of hydrogen or hydrogen mixtures from hydrocarbons at a high temperature.