Abstract ▼

Ⅳ. Results

○ Development of the suitable slag system in the melting-reduction process
- The suitable slag composition range of FeO-CaO-SiO₂ slag system in the melting-reduction process was chosen to extract the precious metals such as gold, silver, platinum, palladium, and rhodi

Ⅳ. Results

○ Development of the suitable slag system in the melting-reduction process
- The suitable slag composition range of FeO-CaO-SiO₂ slag system in the melting-reduction process was chosen to extract the precious metals such as gold, silver, platinum, palladium, and rhodium from waste mobile phone printed circuit boards (PCBs) and honeycomb-type auto catalysts. Using the developed process, up to 95% of PGM, Ni, and Sn contained in the PCBs were extracted in a Cu-Fe alloy phase, respectively.
○ Development of slag ball use
- The slag ball manufactured from the melting-reduction process treating waste mobile phone printed circuit boards (PCBs) and honeycomb-type auto catalysts was developed as a sand blister.
○ Development of electro dissolution technique from alloy containing Au, Ag and PGM (Pt, Pd, Rh)
- The anode slime containing the precious metals like Au, Ag and PGM of 3.2∼4.5% were separated from the Cu-Fe alloy at an optimal experimental condition of the electro-dissolution technique. At the condition, the total separation ratios of Au, Ag and PGM metals were over 98%.
○ Investigation of the separation-refining processes of electro-leaching solution, anode product, and cathode slime
- It was verified that the around 2 M of nitric acid is suitable to leach anode slime. However, more experiments will be carried out for searching the optimum condition and developing the process.
- Gold of 99.9% was produced from residue containing Au and Ag by the leaching using HCl + C₂ and reduction-precipitation using FeSO4.
- It was found in the view points of environmental and economic problems that the process using solvent extraction method followed by the sulfuric acid leaching method is effective to recover Cu, Ni and Sn from anode product.
○ Investigation of the suitable condition for biologically producing cyanide solution and the bioleaching behavior of PGMs contained in residue by the cyanide
- Maximum cyanide producing condition using Chromobacterium violaceum as a bacteria was obtained.
- It was verified that the ability of biologically produced cyanide solution for leaching PGM from waste automobile catalyst is similar to the ability of chemical cyanide solution.
○ Investigation of the high speed electro-recovery technique for extracting Au, Ag and PGM (Pt, Pd, Rh) from the low content PGM solution(<70 ppm)
- In order to treat very low content PGM solution, the high speed electro-recovery technique was developed, which could extract Au, Ag and PGM (Pt, Pd, Rh) from the low content PGM solution(<70 ppm). The recovery ratios was over 99%.
○ Development of a hybrid process for reclaiming rare metals
- Construction of a hybrid reclaiming process for concurrent processing of waste mobile phone PCBs and spent automotive catalyst based on the combined technologies of melting-reduction, slag atomizing, and electrolytic dissolution of an alloy.

(출처 : SUMMARY 8~9p)

목차 Contents

• 표지 ... 1
• 제출문 ... 3
• 최종(연차)보고서 요약서 ... 4
• 요약문 ... 5
• SUMMARY ... 7
• CONTENTS ... 10
• 목차 ... 12
• 표목차 ... 14
• 그림목차 ... 15
• 제1장 연구개발 과제의 개요 ... 18
• 제1절 연구개발의 목적 및 필요성 ... 18
• 제2절 연구개발의 목표 및 내용 ... 21
• 1. 최종목표 ... 21
• 2. 연차별 연구 목표 및 내용 ... 21
• 3. 추진체계 ... 23
• 4. 추진전략 및 방법 ... 24
• 제2장 국내·외 폐휴대폰 재자원화 기술개발 현황 ... 26
• 제1절 국내 도시광석 발생량 현황 ... 26
• 1. 폐휴대폰 기판 ... 26
• 2. 폐자동차 촉매 ... 28
• 3. 폐비철 슬래그 ... 30
• 제2절 국내 기술 및 연구개발 현황 ... 31
• 제3절 국외 기술 및 연구개발 현황 ... 33
• 제4절 주요 특허 및 논문 분석 ... 35
• 제3장 연구개발 수행내용 및 결과 ... 37
• 제1절 서론 ... 37
• 제2절 용융환원 단위 공정 ... 38
• 제3절 슬래그 아토마이징 단위 공정 ... 50
• 제4절 전해분리 단위 공정 ... 59
• 제5절 분리정제 단위 공정 ... 64
• 1. 음극 전착물 ... 64
• 2. 양극 슬라임 ... 71
• 제6절 생물침출 단위 공정 ... 78
• 제7절 고속전해회수 단위 공정 ... 89
• 제8절 결론 ... 102
• 제4장 목표달성도 및 관련분야에의 기여도 ... 103
• 1. 최종 연구목표의 달성도 ... 103
• 2. 당해 연도 연구목표의 달성도 ... 104
• 3. 관련분야에의 기여도 ... 105
• 제5장 연구개발결과의 활용계획 ... 109
• 1. 기대성과 ... 109
• 2. 실용화 및 상업화 계획 ... 109
• 제6장 연구개발과정에서 수집한 해외과학기술정보 ... 110
• 제7장 참고문헌 ... 112
• 끝페이지 ... 114