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| Experimental study on the incineration process for cyanide removal from cyanide-containing solid waste in a nitriding furnace |
| Li Ding1, Jiang Yongfeng1, Sun Dianxing1, Liu Yudong2, Hai Long3, Zhao Yabo3,#br#
Guo Meiyi2, Chu Zhiqiang2 |
| 1. Benxi Steel Group Corporation Ltd., Benxi 117000, China; 2. Fuxin Huanfa Waste Disposal Corporation Ltd., Fuxin 124000, China; 3. Liaoning Technical University, School of Mechanical and Engineering, Fuxin 124000, China |
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Abstract The cyanide-containing solid waste is highly toxic, has a complex composition, and is difficult to treat. In the experiment, the cyanide-containing solid waste from the nitriding furnace was crushed or crushed and washed, then dried. A muffle furnace was used to simulate the incineration process of cyanide-containing solid waste. The relationship between the total cyanide content in the samples after incineration and the incineration temperature and time was examined to determine the optimal process conditions for the incineration treatment of cyanide-containing solid waste. The results indicate that the cyanide-containing solid waste from the nitriding furnace contains cyanide levels that exceed the standard and has a certain moisture content. The cyanide-containing solid waste was crushed to a maximum particle size of 10 mm for incineration. The minimum incineration temperature for compliant emissions is 450℃ with a duration of 40 minutes, while at 500 ℃, the incineration duration can be shortened to 30 minutes. The cyanide-containing solid waste was crushed to a maximum particle size of 5 mm, washed, and then dried before incineration. The minimum incineration temperature for compliant emissions was reduced to 350 ℃, with an incineration duration of only 30 minutes. This effectively reduces energy consumption and improves incineration efficiency. The incineration method for cyanide removal from the nitriding furnace's cyanide-containing solid waste is highly efficient, reliable, and easy to implement, making it the preferred treatment method.
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