A method for reducing energy consumption of carbon-containing and iron-containing dust pellets for composite agglomeration of solids
A compound agglomeration and dust technology, which is applied in the field of reducing the solid energy consumption of composite agglomeration of iron-containing dust pellets, difficult to make pellets, and difficult to roast carbon-containing iron-containing dust pellets, and can solve the problem of iron-containing dust dosage Low, poor air permeability of the material layer, low sintering utilization coefficient, etc., to achieve the effect of reducing the dosage and good quality
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Embodiment 1
[0027]The sinter dust, blast furnace ash, electric furnace ash, raw material field ash, finished product ash, mine tank ash, and converter ash are mixed according to the mass ratio of 15:20:5:30:10:15:5, so that the mixture The mass of medium-fixed carbon on a dry basis accounts for 6.6% of the mass of the mixture on a dry basis. After pretreatment by a high-pressure roller mill, 3.0% of a binder (bentonite) is added to prepare pellets of 8-12 mm in size. The remaining iron ore powder, coke Powder (-0.5mm particle size is 15% by mass, 0.5mm-1mm particle size is 35% by mass, and 1mm-3mm particle size is 50%), flux and returned ore are mixed and prepared into pellets. Among them, the moisture content of green pellets is 11%, the mass ratio of pellets to iron ore powder dry basis is 15%, the moisture content of pellets is 8.3%, the amount of coke powder in pellets is 3.2%, and the alkalinity of pellets is 1.9. The overall alkalinity is 1.8. The sintering mixture is divided into ...
Embodiment 2
[0029] The sintered electric furnace ash, raw material field ash, finished product ash, mine tank ash, converter ash are mixed according to the mass ratio of 10:30:20:25:15, so that the fixed carbon dry basis in the mixture accounts for the dry weight of the mixture. 4.0% of the base mass, after pretreatment by the high-pressure roller mill, add 3.0% of the binder (quicklime) to prepare a pellet material of 8-12mm, and the mass percentage of the remaining iron ore powder and coke powder (-0.5mm particle size is 12%, the mass percentage of 0.5mm-1mm particle size is 30%, and the mass percentage of 1mm-3mm particle size is 58%), flux and returned ore are mixed and prepared into pellets. Among them, the moisture content of green pellets is 11%, the mass ratio of pellets to iron ore powder dry basis is 30%, the moisture content of pellets is 8.3%, the amount of coke powder in pellets is 4.0%, and the alkalinity of pellets is 1.9. The overall alkalinity is 1.8. The sintering mixtu...
Embodiment 3
[0031] The sinter dust removal ash, electric furnace ash, finished product ash, mine tank ash, converter ash, and iron concentrate are mixed according to the mass ratio of 25:20:20:10:15:10, so that the carbon dry basis in the mixture is fixed The mass accounts for 1.0% of the dry mass of the mixture. After pretreatment by high-pressure roller mill, 3.0% of binder (bentonite) is added to prepare pellets of 8-12mm. The rest of iron ore powder and coke powder (-0.5mm The mass percentage of particle size is 10%, the mass percentage of 0.5mm-1mm particle size is 30%, and the mass percentage of 1mm-3mm particle size is 60%), flux and returned ore are mixed to prepare granular material. Among them, the moisture content of green pellets is 11%, the mass ratio of pellets to iron ore powder dry basis is 25%, the moisture content of pellets is 8.3%, the amount of coke powder in pellets is 4.0%, and the alkalinity of pellets is 1.9. The overall alkalinity is 1.8. The sintering mixture i...
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