초록 ▼

Metal scrap cuttings are prepared for use in making sintered pieces. The cuttings are physically and chemically cleaned, ground in an inert atmosphere, heat treated in a reducing atmosphere, and sorted according to particle size in an inert atmosphere. Movement of the cuttings into the various treat

Metal scrap cuttings are prepared for use in making sintered pieces. The cuttings are physically and chemically cleaned, ground in an inert atmosphere, heat treated in a reducing atmosphere, and sorted according to particle size in an inert atmosphere. Movement of the cuttings into the various treatments is performed by vibratory conveyors located in enclosures sealed from the atmosphere.

대표청구항 ▼

A process for treating metal scrap cuttings comprising the steps of: (a) degreasing said cuttings to provide degreased cuttings which have their surfaces unprotected from exposure to their environment, (b) grinding said cuttings, (c) heat treating said ground cuttings to relieve any cold working in

A process for treating metal scrap cuttings comprising the steps of: (a) degreasing said cuttings to provide degreased cuttings which have their surfaces unprotected from exposure to their environment, (b) grinding said cuttings, (c) heat treating said ground cuttings to relieve any cold working in the cuttings, said heat treating step being performed in a reducing atmosphere to prevent oxidation of the cuttings being treated, (d) said cuttings being advanced during the process by vibratory movement which mixes and moves the cuttings without manual contact, said vibratory movement preventing agglomeration of the cuttings and providing good contact between the cuttings and their environment, and (e) continuously isolating the degreased cuttings from the atmosphere and any oxidation-producing atmospheric elements. Apparatus for treating metal scrap cuttings comprising: (a) means for degreasing said cuttings to provide degreased cuttings which have their surfaces unprotected from exposure to their environment, (b) means for grinding said cuttings, (c) means for heat treating said ground cuttings to relieve any cold working in the cuttings, said heat treating means providing a reducing atmosphere to prevent oxidation of the cuttings being treated, (d) means for advancing said cuttings during the process by vibratory movement which mixes and moves the cuttings without manual contact, said advancing means providing vibratory movement to prevent agglomeration of the cuttings and to provide good contact between the cuttings and their environment, and (e) means for continuously isolating the degreased cuttings from the atmosphere and any oxidation-producing atmospheric elements.