• 월간낙농육우
• /
• v.22 no.4 s.240
• /
• pp.140-147
• /
• 2002

• Bulletin of Korea Environmental Preservation Association
• /
• v.27 s.357
• /
• pp.12-15
• /
• 2005

• 비료회보
• /
• s.48
• /
• pp.27-34
• /
• 1977

• 비료회보
• /
• s.466
• /
• pp.19-32
• /
• 1996

• The Magazine of the IEIE
• /
• v.21 no.12
• /
• pp.21-22
• /
• 1994

• Electric Engineers Magazine
• /
• s.124
• /
• pp.4-11
• /
• 1992

• 전기의세계
• /
• v.50 no.4
• /
• pp.4-7
• /
• 2001

• Korea Information Processing Society Review
• /
• v.9 no.5
• /
• pp.108-110
• /
• 2002

• Venture DIGEST
• /
• s.102
• /
• pp.27-27
• /
• 2007

• Resources Recycling
• /
• v.18 no.6
• /
• pp.38-45
• /
• 2009

Dissolution characteristics of magnesite ore in hydrochloric acid solution and removal of impurity were investigated. The dissolution yield increased with increasing temperature and with decreasing particle size. The optimum conditions for dissolution were found to be reaction period of 120 min, reaction temperature of $80^{\circ}C$ and mean particle size of 100. Under optimal dissolution condition the extraction of Mg was 98%. It was found that most of Si and Al exist in the residue, and they can be removed by filtering. Dissolved impurity ions were precipitated as metal hydroxides by pH adjustment. Polymers were used as coagulants for metal hydroxides and the suitable coagulant dosage was 1mg/100ml of non-ionic polymer.