폐로니켈 슬래그로부터 Mg 화합물 제조 기초연구

서지정보

ㆍ발행기관 : 한국열환경공학회 ㆍ수록지정보 : 열환경공학 / 6권 / 1호
ㆍ저자명 : 정이석, 반봉찬, 강승훈

목차

Ⅰ. 서 론
Ⅱ. 페로니켈 슬래그의 물성
Ⅲ. 연구결과 및 고찰
Ⅳ. 결 론
참고 문헌

한국어 초록

영어 초록

The development of technologies for treatment of industrial wastes on the site that they are
produced and their transformation after recycling in new qualitative materials is a project of the
21st century. For that purpose methods and technologies are developed which require a minimum
quantity of energy and time.
The main problem in the production of Fe-Ni is the waste product(Fe-Ni slag). More than about
1 millons tons of industrial wastes will be landfilled annually.
The metallurgical Fe-Ni slag is a multi component system characterized by high percentage
content of Si, Mg, Ca, Fe, and Mg-oxides due to the presence of glass phase(5～30%).
This metallurgical slag can be also used as raw material for production of new materials useful
for the other application.
In this study, serpentine mineral and Fe-Ni slag were treated in a planetary ball mill, and the
effect of grinding were studied on the crystalline structure, size distribution and metal extraction
rate by sulfuric acid leaching. The crystalline peaks of the serpentine and Fe-Ni slag were
gradually reduced with increase of grinding time, and after 120 min. The serpentine was turned
into the amorphous phase. It was found that the extraction rate of the metals contained in the
mineral and Fe-Ni slag by sulfuric acid was rapidly increased by the mechanochemical treatment.
For the mineral treated for 240 min, Mg and Fe metal elements were extracted at 100% within 5min, while 83% and 58% of Ca and Al, respectively, were obtained within 10 min.
1. The leaching ratio of Mg was enhanced along with the acid-leaching temperature increase.
2. The leaching ratio of Mg was enhanced slag (2h) along with the acid-leaching time increase.
3. The leaching ratio of Mg enhanced slag (50%) along with the concentration increase.
4. The leaching ratio of Mg enhanced slag (1:6) along with the solid/liquid ratio increase.
5. The optimum operating conditions of the main process are established, that is, ore sample is
ground for 1h by ball mill, calcined at 700℃ for 1h, and then mixed with 3mol/l H2SO4 and
stirred an normal temperature. The solid/liquid ratio is 1:5 under the optimum operating
conditions. The leaching ratio of magnesium oxide in Fe-Ni slag is up to 93%.

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