HWAHAK KONGHAK, Vol.24, No.4, 291-298, August, 1986
황산암모늄에 의한 α-Al2O3의 황산화반응-I
Reaction of α-Al2O3 with Ammonium Sulfate-I
초록
새로운 황산화제로서 황산암모늄의 사용가능성과 함알루미늄광물로부터 Al2O3를 추출할 수 있는 새로운 공정개발을 시도하고자 그 기초자료로서 α-Al2O3와 （NH4）2SO4의 반응을 조사하고, 아울러 반응생성물로부터 Al분의 침출조건을 조사하였다. 실험결과, 반응온도 300∼400 ℃, (NH4)2SO4의 양은 α-Al2O3에 대한 mole비 6.0∼12.0의 조건하에서 α-Al2O3는 (NH4)3Al(SO4)3 및 NH4Al(SO4)2로의 전화가 가능하였으며, 이 황산화된 Al2O3의 H2O에 의한 침출실험결과 황산화된 Al분은 침출온도 100 ℃, H2O의 양 200 ml/1 g α-Al2O3 sulfated, 침출시간 1 h의 조건에서 99 %이상의 침출이 가능하다.
The reactions between α-Al2O3 and （NH4）2SO4 were investigated in order to find the possibility of (NH4)2SO4 being an alternative sulfating source and of the new process of Al2O3 extraction from aluminum ores.
Also the study was made to search the leaching conditions of aluminum component from sulfated products.
As the results, Al2O3 was converted to （NH4）3Al(SO4)3 and NH4Al(SO4)2 in the ranges of reaction temperature : 300-400 ℃, (NH4)2SO4 mole ratio to α-Al2O3 : 6.0∼12.0 and over the 99 % of aluminum component was leached under the conditions of leaching temp. 100 ℃, amount of H2O 200 ml/lg α-Al2O3 sulfated and leaching time 1 h.
Also the study was made to search the leaching conditions of aluminum component from sulfated products.
As the results, Al2O3 was converted to （NH4）3Al(SO4)3 and NH4Al(SO4)2 in the ranges of reaction temperature : 300-400 ℃, (NH4)2SO4 mole ratio to α-Al2O3 : 6.0∼12.0 and over the 99 % of aluminum component was leached under the conditions of leaching temp. 100 ℃, amount of H2O 200 ml/lg α-Al2O3 sulfated and leaching time 1 h.