Preparation method of zinc-containing dust pellet
A technology for dust and pellets, applied in the field of preparation of zinc-containing dust pellets, can solve the problems of easy breakage, inappropriateness, and pulverization of pellets, and achieves improved hydrophilic properties, improved spheroidization, and good cohesion. Effect
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Embodiment 1
[0047] Aiming at the existing problems, the present invention provides a method for preparing zinc-containing dust pellets, comprising the following steps:
[0048] (1) Ingredients: mix blast furnace bag ash, steel-making ladle furnace ash and steel-making converter soot in a weight ratio of 32.42%: 63.46%: 4.12% to obtain mixed dust;
[0049] (2) adding the carbon-containing dedusting ash from the coke oven to the mixed dust prepared in the step (1) to obtain an admixture, the mass ratio of carbon and iron of the admixture is 0.25;
[0050] (3) Pretreatment: add water to the mixture prepared in the step (2) and carry out wetting, the addition of the water accounts for 10% of the total weight of the mixture, and the wetting time is 10min, then the mixture Stockpile and cover the material for 20 minutes of aging, and the temperature of the mixture will rise by about 15°C;
[0051] (4) Add 1% composite binder to the mixture and mix evenly to obtain a mixture. The composite bind...
Embodiment 2
[0060] Aiming at the existing problems, the present invention provides a method for preparing zinc-containing dust pellets, comprising the following steps:
[0061] (1) Ingredients: mix blast furnace bag ash, steelmaking ladle ash and steelmaking converter dust in a weight ratio of 32.42%: 63.46%: 4.12% to obtain zinc-containing dust;
[0062] (2) adding finely ground bituminous coal to the zinc-containing dust prepared in the step (1) to obtain a mixture, so that the mass ratio of carbon and iron of the mixture is 0.25;
[0063] (3) Pretreatment: add water to the mixture prepared in the step (2) and carry out wetting, the addition of the water accounts for 12% of the total weight of the mixture, and the wetting time is 20min, then the mixture Stockpile and cover the material for 30 minutes of aging, and the temperature of the mixture will rise by about 20°C;
[0064] (4) Add 0.6% composite binder to the mixture after step ripening and mix uniformly to obtain a mixture, the c...
Embodiment 3
[0074] Aiming at the existing problems, the present invention provides a method for preparing zinc-containing dust pellets, comprising the following steps:
[0075] (1) Ingredients: mix blast furnace bag ash, steelmaking ladle ash and steelmaking converter dust in a weight ratio of 32.42%: 63.46%: 4.12% to obtain zinc-containing dust;
[0076] (2) Add the carbon-containing dedusting ash from the coke oven to the zinc-containing dust prepared in the step (1)
[0077] Obtain compound, make the carbon of described compound, the mass ratio of iron be 0.25;
[0078] (3) Pretreatment: add water to the mixture prepared in the step (2) and carry out wetting, the addition of the water accounts for 13% of the total weight of the mixture, and the wetting time is 10min, then the mixture Stockpile and cover the material for 30 minutes to make the temperature of the mixture rise by about 20°C;
[0079] (4) Add 0.8% composite binder to the mixture and mix evenly to obtain a mixture. The co...
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