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Thermal studies on barium sulphate in a pilot scale, rotary kiln

tudi. Thermal studies on barium sulphate in a pilot scale, rotary kiln. Ruto S. , Maree J.P., Kolesnikov A., Zvinowanda C.M., Louw W.J. OUTLINE. Background Materials and Methods Results and Discussion Conclusions. Background.

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Thermal studies on barium sulphate in a pilot scale, rotary kiln

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  1. tudi Thermal studies on barium sulphate in a pilot scale, rotary kiln Ruto S., Maree J.P., Kolesnikov A., Zvinowanda C.M., Louw W.J.

  2. OUTLINE Background Materials and Methods Results and Discussion Conclusions

  3. Background • Sulphate removal from mine wastewater results in the buildup of large amounts of wastes, mainly barium sulphate and gypsum. • This sludge disposal is an environmental problem and a cost burden. • Thermal reduction of barium sulphate to BaS for starting production BaCO3 and sulphur.

  4. Objectives • Thermal reduction of barium sulphate to BaS • To optimization of the rotary kiln

  5. Thermal studies on barium sulphate in a pilot scale, rotary kiln.

  6. Schematic diagram of an electrical rotary kiln

  7. Materials and methods Barium sulphate Coal Argon gas The effect of several operating variables such as, rotation speed, feed-rate, inclination angle, and temperature were investigated.

  8. Figure 1. Effect of drum rotation speed on the yield of BaS. Rotation speed (1.8 rpm, 2.4 rpm, 3.3 rpm, 3.8 rpm, 4.2 rpm, 5 rpm), feed-rate (1 kg/min), inclination angle (2.3°), temperature 1,180°C,

  9. Figure 2. Effect of mixture feed-rate on the yield of BaS. Feed-rate (0.8, 1, 1.6, 3.3 and 5 kg/min), rotation speed (1.8 rpm), inclination angle (2.3°), temperature 1,180°C

  10. Figure 3. Effect of drum angle of inclination on the yield of BaS. Angle of inclination 2.3°, 3.2°, and 4.2° ,feed-rate (0.8 kg/min), rotation speed (1.8 rpm), temperature 1,180°C,

  11. Figure 4. Effect of of drum temperature on the yield of BaS Temperature 900°C - 1180°C, feed-rate (0.8 kg/min), rotation speed (1.8 rpm), inclination angle (2.3°).

  12. Table 1. XRD analysis results for the thermal reduction of barium sulphate to BaS .Feed-rate (0.8 kg/min), rotation speed (1.8 rpm), inclination angle (2.3°), temperature 1,180°C

  13. Conclusions The optimum conditions for different parameters were established. Thermal reduction of Barium sulphate to Bas was achieved. .

  14. Acknowledgements Thanks are due to the following organizations: • THRIP • Tshwane university of technology • Thermopower furnaces

  15. THANK YOU

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