Recycling steel form grinding sward

摘要

Two cleaning processes have been investigated for removing contaminants (cutting oil with phosphorous ester) from high speed steel (HSS) grinding swarf. One process uses an aqueous surfactant washing technique, and the second process uses supercritical carbon dioxide (SCCO_2) extraction. Both technical and peliminary financial analysis are performed to have a better evaluation of these two competing technologies. Bench scale aqueous washings have shown that the required phosphorous removal is easily obtained, but a sufficient oil removal is more difficult.