基于PLC自动控制和红外下渣检测的滑板挡渣技术应用

通过对转炉出钢过程中前期渣、中期渣和后期渣的分析,系统对比了挡渣球、挡渣塞、气动挡渣和滑板挡渣等挡渣方式的挡渣效果。滑板挡渣通过PLC自动控制系统采集转炉倾动角度,同时利用红外下渣检测判断下渣量。根据挡渣工艺要求,滑动水口的全开或全闭可在0.5 s内自动完成,实现出钢过程中前期渣、中期渣和后期渣的最有效阻挡。与其他挡渣方法相比,滑板的挡渣成功率达到100%,转炉出钢下渣量控制在50 mm,回磷稳定控制在0.002%以下,降低了钢水氧化性,减少了合金消耗,提高了转炉成分命中率。

Application of Slide Gate Slag- Stopping Technology Based on PLC Automatic Control and Infrared Detection of Roughing Slag

Through analysis of earlier, middle and later stage slag in BOF tapping, the paper systematically com-pares the efficiency of slag - stopping ball, slag - stopping plug, pneumatic slag - stopping device and slide gate slag -stopping device. The slide gate slag - stopping device collects the tilting angle data of BOF via PLC automatic controlsystem and detects the amount of roughing slag with infrared detection technology. According to the requirements ofslag - stopping process, the slide gate fully opens or closes in 0.5 second automatically, achieving most efficient slag -stopping effect for earlier, middle and later stage slag during tapping. Compared with other slag - stopping methods,the success rate of slide - gate slag - stopping operation is up to 100%, the amount of roughing slag is controlled to 50mm during converter tapping, the rephosphorization rate is stably controlled to a value below 0.002%, thus the oxid-ability of molten steel and alloy consumption are reduced, while the hit ratio of steel composition is improved.