황화처리를 이용한 전로슬래그 중 Cu의 부유선별 거동 연구 = The flotation behavior of cu in convert slag by sulfidizing

다국어 초록 (Multilingual Abstract)

The slags containing valuable metals have been generated 2.030 million ton a year, and the amounts of blast furnace slag, covert slag, electro-slag are 1,100 million ton, 600 million ton, and 330 million ton, respectively. The slag is recycled in cement industry or retreated for the recovery of valuable metals to protect the environment and prevent losing of valuable resources.
The purpose of this study is to figure out the behavior of Cu flotation in convert slag with xanthate after selective sulfidizing of copper oxide using sulfidizing reagent. In order to investigate the effect of sulfidization, contact angles were measured and the distribution of the sample components were analyzed with SEM-EDS. Flotation tests were performed to investigate the flotation behavior of metals.
In the result of sulfidizing test, the optimum condition of Cu ion is as follows; 60min in reaction time. 20℃ in reaction temperature, pH 3.
The concentration of sulfidizing reagent was required double more than that of metal ions to sulfidize metals.
Although the sulfidization of Cu was observed in the result of SEM-EDS, other metals such as Pb also were sulfidized at the same time. This result indicates that the selective sulfidization was not achieved in the tests. After sulfidizing, the contact angle increased from 52ﾟ to 115ﾟ, which shows sulfidizing could produce a hydrophobic surface.
In the result of flotation experiment, the grades of Cu, Zn, Fe, Ni, Pb were 12.41%, 1.49%, 32.19%, 0.11%, 0.66%, respectively, in concentrate and 3.82%, 2.46%, 0.18%, 0.69%, respectively, in tailing. The grade of Cu was higher in concentrate than in tailing. The grade and recovery were 11.0% and 62.8%, respectively, under the following conditions; pulp density 3g/300ml, MIBC 160g/t and SIPX 500g/t.

목차 (Table of Contents)

• 제 1 장 서 론 1
• 1.1 연구배경 1
• 1.2 전로슬래그의 특성 3
• 1.2.1 전로 슬래그의 생성 3
• 1.2.2 전로 슬래그의 활용현황 6
• 1.2.3 구성성분 분석 7
• 1.3 선행연구사례 및 활용현황 8
• 제 2 장 이론적 배경 11
• 2.1 SEM-EDS 분석 11
• 2.2 접촉각 측정 15
• 2.3 부유선별 18
• 제 3 장 용액 중 금속 이온의 황화 침전 거동 21
• 3.1 황화처리의 열역학적 해석 21
• 3.2 황화처리 실험 25
• 3.3 황화처리 실험 결과 27
• 3.3.1 황화처리 시간에 따른 영향 27
• 3.3.2 황화제의 농도에 따른 영향 28
• 3.3.3 황화처리 온도에 따른 영향 30
• 3.3.4 용액의 pH에 따른 영향 32
• 제 4 장 고체시료 중 금속의 선별거동 34
• 4.1 황화처리 실험 34
• 4.2 SEM-EDS 분석 36
• 4.3 SEM-EDS 분석 결과 37
• 4.4 접촉각 측정 실험 38
• 4.5 접촉각 측정 결과 39
• 4.5.1 접촉각 측정 결과(전로슬래그) 39
• 4.5.2 접촉각 측정 결과(공작석) 40
• 4.5.3 접촉각 측정 결과(혼합시약) 41
• 4.6 부유선별 실험 42
• 4.7 부유선별 실험 결과 44
• 4.7.1 부유선별 실험 결과(전로슬래그) 44
• 4.7.2 부유선별 실험 결과(공작석) 45
• 4.7.3 부유선별 실험 결과(혼합시약) 46
• 4.7.4 부유선별 실험 결과(Recovery & grade of Cu) 47
• 4.7.5 부유선별 실험 결과(포수제 농도 변화) 48
• 제 6 장 결론 49
• 참고문헌 51
• 감사의 글 54