The porous carbonized wood may be used for various applications such as filters, or may be further processed to form carbon-polymer or carbon--carbon composites.
The carbonized wood may also be converted to a ceramic such as silicon carbide.
These retorts held more than ten cords of wood and considerably increased production rates while reducing the amount of labor involved. The splinters are first heated in air at 150 to 400° C., and are then charred at 2000 to 3000° C. The fibers are then mixed with a carbonizable binder and the mixture is heated to form the carbon--carbon composite. These are glass-like carbons produced in the form of an open pore foam.The brick kiln method meant a faster production rate since mounds were not needed and rapid loading was possible. The manufacture of graphite products is well known. Acheson patented a process for manufacturing molded graphite parts which uses an electric resistance furnace for heat treatment of green products at temperatures adequate for graphitization to occur (about 3000° C.).This was also an asset for the iron industry which was rapidly expanding. Molded graphites are conventionally produced by a compaction process using a mixture of carbon filler with an organic binder which is heat treated to produce parts such as large electrodes used in metallurgical processes. This was a significant development as it enabled carbon electrodes with relatively low resistivity to be produced.Heating was able to be provided externally from below the retorts and fuel was typically in the form of charcoal, coal, wood gas, wood oil, wood tar or wood alone. Glass-like carbons are used as vessels in chemical processing or analytical chemistry.A single run took about twenty four hours to complete. discloses a method for pre-charring the surface of wood in order to retard fire and rot. They are also used as crucible material for the melting of noble metals and special alloys, especially in dental technology.The vapors were collected and distilled in the form of pyroligneous acid which was later refined to produce acetic acid, methanol, acetone, furfural, tars and oils. Glass-like carbons in the form of small spheres are being considered for uses as catalyst supports.