A method for preparing fe2o3/al2o3 oxygen carrier with iron-containing metallurgical dust as main raw material
A technology for metallurgical dust and sludge and main raw materials, which is applied in the field of preparing Fe2O3/Al2O3 oxygen carrier, can solve the problems of vicious cycle enrichment of harmful elements, waste of secondary resources, difficulty in batching, etc., and achieves good oxygen carrying capacity and reduction reaction rate. , good reaction performance, the effect of reducing the preparation cost
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Embodiment 1
[0023] Take 100g of blast furnace gas mud, add hydrochloric acid for acidolysis, filter to remove unmelted slag, add sulfuric acid, adjust the pH to 1, heat the sulfuric acid solution to 80°C, add evaporated water during the acidolysis process, and maintain acidolysis The liquid level remained unchanged, and the reaction ended after 2 hours. Suction filtration, wash the filter cake twice, suction filtration until the filtrate has no suspended solids, add deionized water until the total volume of the solution reaches about 500ml, add 6ml of hydrogen peroxide and 6ml of ammonia water to the filtrate respectively, and wait until the temperature of the filtrate rises to 70 At ℃, ammonia water was added dropwise, and the pH was adjusted to 4 to prepare a precipitated product. After the pH was stable, the stirring was continued for 30 minutes. Suction filter and wash the prepared product 3 to 4 times, then put the washed product in a drying oven and dry it at 100°C for 6 hours to re...
Embodiment 2
[0025] Take 100g of blast furnace gas mud, add hydrochloric acid for acidolysis, filter to remove unmelted slag, add sulfuric acid, adjust the pH to 1.5, heat the sulfuric acid solution to 85°C, add evaporated water during the acidolysis process, and maintain acidolysis The liquid level remained unchanged, and the reaction ended after 2 hours. Suction filtration, wash the filter cake twice, suction filtration until the filtrate has no suspended solids, add deionized water until the total volume of the solution reaches about 500ml, add 6ml of hydrogen peroxide and 6ml of ammonia water to the filtrate respectively, and wait until the temperature of the filtrate rises to 70 At ℃, ammonia water was added dropwise to adjust the pH to 3.5 to prepare a precipitated product. After the pH was stable, the stirring was continued for 30 minutes. Suction filter and wash the prepared product 3 to 4 times, then put the washed product in a drying oven and dry it at 100°C for 6 hours to remove...
Embodiment 3
[0027] Take 100g of blast furnace gas mud, add hydrochloric acid for acidolysis, filter to remove unmelted slag, add sulfuric acid, adjust the pH to 2, heat the sulfuric acid solution to 90°C, add evaporated water during the acidolysis process, and maintain acidolysis The liquid level remained unchanged, and the reaction ended after 3 hours. Suction filtration, wash the filter cake twice, suction filtration until the filtrate has no suspended solids, add deionized water until the total volume of the solution reaches about 500ml, add 6ml of hydrogen peroxide and 6ml of ammonia water to the filtrate respectively, and wait until the temperature of the filtrate rises to 70 At ℃, ammonia water was added dropwise, and the pH was adjusted to 4 to prepare a precipitated product. After the pH was stable, the stirring was continued for 30 minutes. Suction filter and wash the prepared product 3 to 4 times, then put the washed product in a drying oven and dry it at 100°C for 6 hours to re...
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