Abstract
In the present study celestite (SrSO4), the natural ore of strontium from Trichirapalli district in Tamil Nadu (India) containing impurities like Fe, Ba, Si etc. was chemically treated with HCl/HNO3 to reduce impurity level. After initial acid purification the mass was treated with charcoals of different grades to obtain SrS from celestite. This was finally converted to SrCO3 by treating SrS with Na2CO3 solution. In another effort the leached celestite was directly heated with Na2CO3 solution to obtain SrCO3. The percentage conversion of SrSO4 to SrS has been studied with respect to time, temperature, mole ratio etc. The study includes X-ray diffraction study of the raw material celestite, reduced SrS and produced SrCO3 for the identification of phases. The SEM study was also conducted for celestite and strontium carbonate for the study of its particle morphology. The details of conversion and the obtained results have been described in this paper. Focus has been also made to optimize the process to prepare SrCO3 (ferrite grade) with maximum purity up to 99.0% SrCO3. The present study also gives a comparative study of the two processes involved in the preparation of SrCO3 in terms of process easiness, economy, percentage yield etc.
| Original language | English |
|---|---|
| Title of host publication | Characterization and Development of Novel Materials |
| Publisher | Nova Science Publishers, Inc. |
| Pages | 47-59 |
| Number of pages | 13 |
| ISBN (Print) | 9781613241493 |
| State | Published - 2011 |
| Externally published | Yes |
Keywords
- Black ash process
- Celestite
- Direct conversion process
- Strontium carbonate
- Strontium sulphate