麦尔兹窑富氧煅烧的生产实践

Production Practice of Oxygen-enriched Calcination in the Maerz Kiln

以某钢厂麦尔兹石灰窑为研究对象,基于其工艺特点,从石灰产量、煤气消耗、石灰质量、废气排放等方面开展富氧煅烧生产实践。富氧煅烧可优化生产指标,加快煤气燃烧速率,提高火焰温度,增强窑内的辐射能力。实践结果表明:将富氧气体φ(O_(2))控制在29%左右可以取得最好的经济效益;富氧煅烧同传统助燃空气煅烧相比,可提高日产75 t,降低助燃空气量25%~35%,节约转炉煤气消耗35.92 m3/t,降低废气排放量19%。

Taking the Maerz lime kiln of a certain steel plant as the research object,based on its process characteristics,the production practice of enriched oxygen calcination is carried out from aspects such as lime output,gas consumption,lime quality,and exhaust gas emissions.Oxygen rich calcination can optimize production indicators,accelerate gas combustion rate,increase flame temperature,and enhance the radiation capacity inside the kiln.The practical results indicate that the enrichment of oxygen gasφ(O_(2))is controlled at around 29%,which can achieve the best economic benefits.Compared with traditional combustion air calcination,oxygen enriched calcination can increase daily output by 75 t,reduce combustion air volume by 25%~35%,and save converter gas consumption by 35.92 m3/t,and reduce exhaust emissions by 19%.