Method for producing a molded part from a carbon material using recycled carbon fibers and molded part

A method for manufacturing a molded part formed from carbon containing a quantity of less than 20% by weight of carbon fibers, which comprises the following steps:

• a) comminuting parts selected from the group consisting of waste parts formed from a carbon fiber-reinforced carbon and scrap parts formed from a carbon fiber-reinforced carbon resulting in comminuted product and oxidizing the comminuted product;
• b) producing a mixture from the comminuted product obtained in step a), pitch, coke and at least one additive, wherein the mixture contains less than 20% by weight of the carbon fibers;
• c) molding the mixture obtained in step b) into the molded part;
• d) carbonizing the molded part obtained in step c);
• e) impregnating the molded part carbonized in step d) with an impregnating agent;
• and
• f) graphitizing the molded part impregnated in step e).

A method for manufacturing a molded part formed from carbon containing a quantity of less than 20% by weight of carbon fibers, which comprises the following steps:

• a) comminuting parts selected from the group consisting of waste parts formed from a carbon fiber-reinforced carbon and scrap parts formed from a carbon fiber-reinforced carbon resulting in a comminuted product and, oxidizing the comminuted product;
• b) producing a mixture from the comminuted product, pitch, coke and at least one additive, wherein the mixture contains less than 20% by weight of the carbon fibers;
• c) molding the mixture into the molded part;
• d) carbonizing the molded part;
• e) impregnating the molded part carbonized with an impregnating agent;
• and
• f) graphitizing the molded part, the parts formed from a carbon fiber reinforced synthetic material are carbonized prior to comminution in accordance with step a) or the product comminuted in accordance with step a) is carbonized prior to the oxidation, before the product obtained thereby is supplied to step b).

A method for manufacturing a molded part formed from carbon containing a quantity of less than 20% by weight of carbon fibers, which comprises the following steps:

• a) comminuting parts selected from the group consisting of waste parts formed from a carbon fiber-reinforced concrete and scrap parts formed from a carbon fiber-reinforced concrete, and separating a matrix from the carbon fibers resulting in comminuted carbon fibers;
• b) producing a mixture from the comminuted carbon fibers obtained in step a), pitch, coke and at least one additive, wherein the mixture contains less than 20% by weight of the carbon fibers;
• c) molding the mixture into a molded part;
• d) carbonizing the molded part;
• e) impregnating the molded part with an impregnating agent;
• and
• f) graphitizing the molded part.

A molded part, comprising:

• carbon containing a quantity of less than 20% by weight of carbon fibers, the carbon formed by:
• a) comminuting parts selected from the group consisting of waste parts formed from a carbon fiber-reinforced composite material or scrap parts formed from the carbon fiber-reinforced composite material resulting in a comminuted product;
• b) producing a mixture from the comminuted product, a binder, and a carbon material, wherein the mixture contains less than 20% by weight of the carbon fibers;
• c) molding the mixture into the molded part;
• and
• d) carbonizing the molded part.