熔融轉爐渣造粒操作技術開發

本研究利用自行建立的轉杯造粒設備，建構可產出高溫渣粒的操作技術，作為後續爐渣熱能回收技術開發的熱源。研究上使用石蠟冷模實驗篩選出適合的造粒公式來預測產出粒徑大小，以熱模實驗確認出不會使融渣顆粒沾粘的壁面材質後，進行造粒系統的製作。經由多次造粒實驗產出的渣粒，修正造粒公式參數，使修正後的造粒公式具有誤差10%以內的預測能力，作為後續系統放大的設計依據，或是操作參數選擇指引。由造粒系統所進行的熔渣造粒實驗結果顯示，轉杯造粒可順利產出平均渣粒溫度800℃以上高溫渣粒，造粒系統底部所蒐集到的渣粒亮橘色，推測實際產出渣溫於900度以上。本研究產出高溫渣粒，以冷風吹送進行熱交換，10分鐘內約可置換出40%的渣熱量，後續可依據本研究成果，進一步放大規模，以便確認工業化應用上可能遭遇的問題。

關鍵字

熔渣；造粒；轉爐渣；操作技術；高溫；熱回收

並列摘要

In this study, a self-established rotary granulation device was used to construct the operation techniques that can produce high-temperature slag particles as a heat source for the subsequent development of slag heat recovery technology. In the research, a paraffin cold mold experiment was used to select a suitable formula for predicting the particle size, and a molten-slag hot mold experiment was performed to confirm the wall material that would not cause the molten slag particles to stick, and then a granulation system was produced. The slag granules produced through multiple granulation experiments are used to modify the parameters of the particle size prediction formula, so that the revised formula has a prediction ability within 10% error, which can be used as a design basis for subsequent system scaling-up or as a guide for selecting operating parameters. The results of the slag granulation experiment conducted by the granulation system show that the rotary granulation can smoothly produce high-temperature slag granules with an average slag temperature of 800 ° C or higher. The output slag temperature is predicted to be above 900 degrees from its bright orange appearance. 40% of the slag heat can be exchanged through cold air within 10 minutes. Based on the results of this research, the scale can be further enlarged to confirm problems that may be encountered in industrial applications.

並列關鍵字

molten slag ； dry granulation ； BOF slag ； granulation technique ； high temperature ； heat recovery

參考文獻

Firsbach, F.,Ho, H.T.,Senk, D.(2015).Potential in iron and steel slag by making use of in situ measurements and recovery.8th European Slag Conference.(8th European Slag Conference).