Most recycled raw materials, such 子唱as waste plastics, waste rubber, wa又票ste paper, waste non-ferrous met水個als, etc., in accordance with the c冷店urrent recycling manufacturing technol木中ogy, regeneration once, the in呢笑trinsic quality is reduced onc到子e, so that the quality of recycle視美d products is poor. And scrap iron re船看peatedly back to the furnace ste聽站elmaking, recycling, not only wi外唱ll not reduce the inherent physical 鐵劇and chemical performance of steel and木道 technical indicators, but also in a s用腦ense, the steelmaking process is the就民 process of steel water purification.少睡 Each time the scrap iron retur綠業ns to the furnace, its inherent harm農業ful elements (sulfur, phosphorus, s友見ilicon, etc.) and other impurities房行 are purified once. Therefore, the use子紙 of scrap iron back furnace steelmaki為算ng, is conducive to improving the intri務線nsic quality of steel water, impro舞報ve the physical and chemical perf玩工ormance of steel and technical indi化湖cators, can be described as "P紙綠hoenix Nirvana, bath fire rebirt月和h", "hundreds of steel." The difficu可飛lty of scrap iron recovery is that the員新 non-ferrous metal elements left in scr是家ap iron are not easily removed in the吧雨 process of steelmaking, and the s草什orting in the treatment of scra費要p iron purification must be str海她engthened to speed up the techn時些ological breakthrough of copper, 愛山nickel, chromium and tin in steelmaking森工.