Classifications

• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B7/00—Heating by electric discharge
  • H05B7/02—Details
  • H05B7/06—Electrodes
  • H05B7/08—Electrodes non-consumable
  • H05B7/085—Electrodes non-consumable mainly consisting of carbon

Definitions

• the invention relates to a process of manufacturing carbon electrodes for electric furnaces.
• Furnace electrodes are manufactured by working carbon obtained by coking mineral coal or other suitable substances with a liquid binding agent, such as tar, into a plastic mass, pressing it in moulds, and then heating it to a temperature of 1000 to 1500".
• a liquid binding agent such as tar
• mineral coal just capable of caking or baking is filled into a container or receptable and in the crushed (pulverized, granulated) state baked or roasted in this container.
• a coal will be chosen which has only a low mineral content. Coal with a high mineral content may easily be freed from the main ortion of the admixed minerals by any of the processes known in the art. A well caking coal will furthermore be chosen. The quahty of the finished electrode de nds to a hi h degree upon the condition o the coal. t is, however, possible mass.
• the quality of the pulverized or powdered coal may also be influenced by admixing with it a pulverized or granular mass of a substance which softens on heating and then serves as binding agent, such as asphalt, resin, pitch, bitumen and so on.
• the pulverized or powdered coal' may also be moistened with a small quantity of tar or any other suitable liquid. Part of the special advantages of the process is, however, lost thereby. As a rule care will therefore be taken not to interfere too much with its pouring capacity by moistening the powder. Small quantities of baked coal in fine distribution or larger pieces of such baked or unbaked coal may be added.
• the coarse pieces mix intimately with the pulverized (granular) coal forming the basic
• Other additions such as pieces of metal, usual in carbon electrodes, may be made to the powdered'coal .forthe same ob-
• the process is particularly suitable for the manufacture of so-called self-baking electrodes which are produced and fed into the furnace in a continuous operation.
• a process for the manufacture of carbon electrodes for electric thermal processes consisting in filling unglowed, crushed, dry mineral coal into a container and baking it in said container, and subjecting the mass in said container to a pressure while still in the plastic state.
• a process for the manufacture of carbon electrodes for electric thermal processes consisting in filling unglowed, crushed, dry mineral coal into a container and baking it in said container, and subjecting the mass in said container to a pressure while still in the plastic state by applying a weight to the column of coal in said container.
• a process of manufacturing carbon electrodes for electric thermal processes consisting in filling unglowed, crushed, dry mineral coal admixed with dry coarser pieces of carbonaceous material, into a container, and in baking the mixture in said container.
• a process of manufacturing carbon electrodes for electric thermal processes consisting in filling unglowed, crushed, dry mineral coal admixed with dry coarser ie 5 of pit coal, into a container, and in ba mixture in said container.
• a process of manufacturing carbon electrodes for electric thermal processes consisting in filling unglowed, crushed, dry minering the al coal admixed with dry coarser pieces of burnt coal, into a container, and in baking the mixture in said container.
• a process of manufacturing carbon electrodes for electric thermal processes consisting in filling unglowed, crushed, dry min eral coal admixed with dry graphitic carbon,
• a process of manufacturing carbon electrodes for electric thermal processes consisting in filling un'glowed, crushed, dry mineral coal into a container, vibrating said container to uniformly densify the dry coal, and baking it in said container.
• a rocess of manufacturing carbon electrodes or electric thermal processes consisting in filling unglowed, crushed, dry minera1 coal into a container, vibrating said container to uniformly densify the dry coal, putting the dry densified mass under pressure, and baking it in said container into a perfectly coked condition.

Landscapes

• Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Plasma & Fusion (AREA)
• Carbon And Carbon Compounds (AREA)
• Ceramic Products (AREA)
• Working-Up Tar And Pitch (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=6291359

Family Applications (1)

Country Status (4)

Cited By (5)

• 0
  • BE BE370594D patent/BE370594A/xx unknown
• 1930
  • 1930-05-26 FR FR696116D patent/FR696116A/fr not_active Expired
  • 1930-05-28 GB GB16521/30A patent/GB359990A/en not_active Expired
  • 1930-06-09 US US460099A patent/US1840491A/en not_active Expired - Lifetime

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