4th International Symposium on High-Temperature by Tao Jiang, Jiann-Yang Hwang, Phillip J. Mackey, Onuralp

By Tao Jiang, Jiann-Yang Hwang, Phillip J. Mackey, Onuralp Yucel, Guifeng Zhou

Within the final decade, international metallurgical industries have skilled quick and filthy rich progress. hot temperature metallurgical expertise is the spine to help the technical, environmental, and competitively priced wishes for the growth.

This symposium presents a level to introduce the developments and advancements of recent hot temperature metallurgical applied sciences and their functions to the parts of processing of minerals, extraction of metals, guidance of refractory and ceramic fabrics, sintering and synthesis of excellent debris, remedy and recycling of slag and wastes, and saving of strength and security of environment.Content:

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A t present, there is no report about the dielectric constant and dielectric loss of ammonium tetramolybdate. Consequently, before doing this experiment, the actual temperature rising characteristics of ammonium tetramolybdate in the microwave field was ensure. In this study, 50g samples were put into microwave cavity, and set microwave power at 1000 W, and then open the equipment. Record the temperature every 5 second. The results were shown in Figure 1. Figure 1 The temperature rising characteristics of ammonium tetramolybdate in the microwave field The Figure 1 shows that the temperature rising of ammonium tetramolybdate is slow in the microwave field.

The experiments results are shown in Fig. 5-8. f Effect of NaOH concentration on alumina leaching rate The results showed that the alumina leaching rate increased with the increasing leaching temperature and time. The leaching rate increased with increasing in concentration of NaOH. But when concentration of NaOH was more than 9 g/L, the leaching rate decreased. The main reason is that quite high concentration of NaOH would inhibit the reaction (6). When concentration of Na 2 C0 3 was more than 240 g/L, the alumina leaching rate didn't increased obviously.

There is an exothermic peak correspond to the step. It is illustrated that the decomposition of ammonium tetramolybdate is finished by one step. The initial temperature of decomposition between 280 °C to 300 °C was observed. The termination temperature is reach between 350°C to 380°C. 28% of theoretical weightlessness; it can be concluding that the ammonium tetramolybdate is resolved into molybdenum trioxide. Therefore, the final product could be confirmed molybdenum trioxide. To prove the conclusion, the product we detected by XRD.

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