Abstract
An effect of high-energy ball milling on the mechano-chemical conversion of celestite to strontium carbonate (SrCO 3 ) was studied. A celestite ore was ground by a planetary ball mill in a highly concentrated sodium carbonate (Na 2 CO 3 ) solution. The experimental study was carried out to determine the effects of milling time (15, 30, and 45 min) and Na 2 CO 3 concentration (1, 1.25, and 1.5 M) on the particle size and SrCO 3 percentage of the product. A celestite/ball weight ratio was selected as 1/10 and the volume of carbonate solution was calculated for the stoichiometric amount of sulfate in celestite, as constant. After filtering, washing and drying the precipitated SrCO 3 sludge was analyzed by XRD, SEM-EDS. Powders were leached in HCl solution and analyzed by AAS in order to determine the SrCO 3 amount in the product. A response surface methodology was applied via the Box-Behnken method for the results of particle size and SrCO 3 percentage. Regression model coefficients were 98.61 and 98.14%, which were the results of compatibility as experimentally obtained and predicted by the model, respectively. The maximum amount of SrCO 3 , 96.84% and the minimum particle size, 10.297 μm were obtained with the maximum values of the parameters, 45 min, 1.5 M Na 2 CO 3 , and 450 rpm.
| Original language | English |
|---|---|
| Pages (from-to) | 324-335 |
| Number of pages | 12 |
| Journal | Physicochemical Problems of Mineral Processing |
| Volume | 55 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2019 |
Bibliographical note
Publisher Copyright:© Wroclaw University of Science and Technology.
Keywords
- Celestite
- Direct conversion
- Response surface methodology
- Strontium carbonate
- Wet milling