Method for preparing sintered NOx inhibitor by using metallurgical and municipal solid waste
An inhibitor and municipal technology, which is applied in the field of sintered NOx inhibitors, can solve the problems of resource waste, environmental pollution, land occupation, etc., and achieve the effects of avoiding secondary generation, simple preparation process, and inhibiting the formation of NOx
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Embodiment 1
[0037] Utilize the main composition as TFe 57.05%, SiO 2 The mixture with 5.31%, MgO 1.8%, and basicity 1.95 is conventionally sintered, and the maximum concentration of NOx emission is 349mg / m 3 .
Embodiment 2
[0039]Cleaning and preparation of sintered NOx inhibitors from metallurgical and municipal solid waste and its application method. Iron-containing metallurgical dust and high-calcium municipal solid waste are prepared into pellets with an iron grade of 52%, Ca / Fe of 0.7, and a particle size of 12 mm. And dry at 100°C for 60min, then heat up the dried pellets at a heating rate of 400°C / min to 1300°C for 15min, and then rapidly cool them at a cooling rate of 120°C / min to obtain a Ca-Fe base Solid roasted product, after the product is ground by a paint grinder for 10 minutes, the average particle size composition is 45 μm, and the powdered NOx inhibitor is uniformly sprayed on the surface layer of the sintered fuel with a spray gun, and the spraying amount is 5% of the fuel mass, and then participates in sintering, NOx emission maximum concentration is 285mg / m 3 , 18.3% lower than when no inhibitor was added.
Embodiment 3
[0041] Cleaning and preparation of sintered NOx inhibitors from metallurgical and municipal solid waste and its application method. The iron-containing metallurgical dust and high-calcium municipal solid waste are prepared into small balls with a particle size of 10mm and an iron grade of 47% and a Ca / Fe of 1.2. And dry at 400°C for 20 minutes, then heat up the dried pellets at a heating rate of 300°C / min to 1100°C for 60 minutes, and then rapidly cool them at a cooling rate of 60°C / min to obtain Ca-Fe The base solid roasted product, after the product is ground by a paint grinder for 15 minutes, the average particle size composition is 45 μm, and the powdered NOx inhibitor is uniformly sprayed on the surface layer of the sintered fuel with a spray gun, and the spraying amount is 15% of the mass of the fuel, and then participates in sintering , NOx emission maximum concentration is 249mg / m 3 , 28.7% lower than that without inhibitors.
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