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맥석제한제 (脈石制限劑) 로서의 전분, 아라비아고무에 관한 연구
최호영 대한금속재료학회(대한금속학회) 1966 대한금속·재료학회지 Vol.4 No.3
It seems to us that the soluble starch, gum arabic are strong modifier of carbonate minerals such as dolomite limestone rhodochrosite etc. Therefore, Rhodochrosite ore which contain limestone is almost impossible to separate each other by soap flotation. But in the case of apatite ore which is associated with dolomite or gangue mineral, we can effectively separate each other by using soluble starch, Gum arabic as modifier. We can obtain the result having the concentrate of 32.6 to 34.79 percent P₂O_5 under 80 to 87.79 percent recovery from 5 to 12 percent P₂O_5 original ore containing much dolomite as gangue mineral, by using soluble starch or Gum arabic as modifier of the dolomite. The most of suitable conditions of the soap flotation of the apatite are as follows; ore size...100 mesh pulp concentration...20% solid starch 800 g/ton or Gum-arabic...400 g/t sodium maleate...200 to 250 g/t Na₂CO₃...2,000 / PH...9 to 10 pulp temperature...24 to 25℃ flotation time...20 minutes
최호영 대한금속재료학회(대한금속학회) 1969 대한금속·재료학회지 Vol.7 No.3
Result of the tests led to the following Conclusions: 1. The Optimum Size was-35 mesh in electromagnetic separation of pyrrhotite ore but the undersize of 230 mesh must be removed by classifier before separation. 2. The Optimum size was-140 mesh in roasting of the ore. 3. The optimum temperature at-140 mesh are in roasting of pyrrhotite ore ranges from 600℃ to 700℃. 4. The optimum retaining time of the ore in roaster at-140 mesh ore was 40 minutes. 5. SO₂and O₂volume percentage in the gas would be from roaster 6% to 7% and 7% respectively. 6. The cinder will be able to use in the iron making by sintering.