Preparation of barium salts from Egyptian barite ore
Ahmed El-Toni Mohamed;
Abstract
Production of barium salts from Egyptian barite ore was investigated. The barite ore was mixed with coal and made into pellets in pelletization step. The optimum pelletization conditions are barite ore grain size: -0.074 mm, pellet size: 8-12 mm, stochiometric amount of barite to coal: 1:5, water amount: 13 %, disc pelletizer angle: 50°, residence time: 25 min.
The produced pellets were subjected to reduction step and optimum reduction conditions are reduction temperature: 1050 °C, reduction time: 60 min., N2 gas flow rate: 0.5 L/min. At these conditions barite have been reduced by coal to give 87.79% reduction efficiency.
The reduction product was subjected to dissolution in water and optimum dissolution conditions are: solid/liquid ratio: O.lg/ml, temperature: 90 °C, time: 60 min. At these conditions black ash dissolved in water with dissolution efficiency and giving 5.7% liquor of BaS at 0.1 g/ml solid/liquid ratio
The barium sulfide solution was used for precipitation of barium sulfate and
carbonate. The optimum conditions for precipitation of Barium sulfate and barium are: concentration of barium sulfide: 5%, stirring speed of barium sulfide solution: 1050 r.p.m, stirring time of barium sulfate and carbonate solution: 10 min, precipitation temperature: 25°C, stochiometric ratio of precipitating agents to barium sulfide: 1:1, Precipitating agents concentration:
5%, rate of addition of precipitating agents: 0.5 g/min, BaS04Crystal inhibitor: Sodium dioctyl sulfosuccinate, concentration of BaS04 crystal inhibitor: 8 ppm, BaC03Crystal inhibitor: Dodcyl sulfate, Concentration of BaC03 crystal inhibitor: 6 ppm
At these conditions the particle size for barium sulfate and barium carbonate is BaS04 99%< 0.82 f.!m and BaC03 99%< 0.75 f.!m
The produced pellets were subjected to reduction step and optimum reduction conditions are reduction temperature: 1050 °C, reduction time: 60 min., N2 gas flow rate: 0.5 L/min. At these conditions barite have been reduced by coal to give 87.79% reduction efficiency.
The reduction product was subjected to dissolution in water and optimum dissolution conditions are: solid/liquid ratio: O.lg/ml, temperature: 90 °C, time: 60 min. At these conditions black ash dissolved in water with dissolution efficiency and giving 5.7% liquor of BaS at 0.1 g/ml solid/liquid ratio
The barium sulfide solution was used for precipitation of barium sulfate and
carbonate. The optimum conditions for precipitation of Barium sulfate and barium are: concentration of barium sulfide: 5%, stirring speed of barium sulfide solution: 1050 r.p.m, stirring time of barium sulfate and carbonate solution: 10 min, precipitation temperature: 25°C, stochiometric ratio of precipitating agents to barium sulfide: 1:1, Precipitating agents concentration:
5%, rate of addition of precipitating agents: 0.5 g/min, BaS04Crystal inhibitor: Sodium dioctyl sulfosuccinate, concentration of BaS04 crystal inhibitor: 8 ppm, BaC03Crystal inhibitor: Dodcyl sulfate, Concentration of BaC03 crystal inhibitor: 6 ppm
At these conditions the particle size for barium sulfate and barium carbonate is BaS04 99%< 0.82 f.!m and BaC03 99%< 0.75 f.!m
Other data
| Title | Preparation of barium salts from Egyptian barite ore | Other Titles | تحضير أملاح الباريوم من خامة الباريت المصرية | Authors | Ahmed El-Toni Mohamed | Keywords | Barite, reduction, Black ash, Precipitation of barium sulfate. | Issue Date | 2001 |
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