and for a period of 10-3-10-2 s. The cycle is then repeated at a frequency of >350/min. The method may use as the raw material methane, ethane, or other gaseous hydrocarbons mainly produced during the separation of the large fraction of light hydrocarbons from petroleum gas. The method has a yield 2
98/00651 Manufacture of glass-ceramic tiles from fly ash
- Publisher
- Elsevier Science
- Year
- 1998
- Weight
- 205 KB
- Volume
- 39
- Category
- Article
- ISSN
- 0140-6701
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โฆ Synopsis
The paper investigates the sintering and crystallization behaviour of a LizO-AlsOs-Si02 glass powder containing TiOz and ZrOz. In-situ measuring methods of high-temperature dilatometry, high-temperature X-ray diffractometry and DTA at heating rates between 0.5 and 20 K/mm were conducted. By comparing the results of the different methods the shrinkage could be explained as an overlap of sintering and crystallization processes. As the heating rate increases, the sintering and crystallization processes are more sharply separated, so that higher final densities of the sintered samples are possible.
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An annular chamber provided with local ore feed and discharge as well as peripheral burners and a gas-transfer system is included in the rotaryhearth furnace for ore treatment. The CO-rich atmosphere from coal combustion is applied for the reduction of the ore and recirculated in the furnace for se