Resource recovery process of galvanizing sludge
A technology of electroplating sludge and treatment process, applied in the direction of oxidation treatment of sludge, etc., can solve the problems of waste of resources, loss, and inability to run production for a long time.
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Embodiment 1
[0083] Composition of electroplating sludge: Cr(OH) 3 4.78%, Cu(OH) 2 0.45%, Zn(OH) 2 1.07%, Ni(OH) 2 0.56%, Fe(OH) 2 2.15%, moisture is 87.6%, and other impurities are 3.39%. After the above sludge is dried by a drum dryer, weigh 1 ton, weigh 0.7 tons of coke, 0.24 tons of serpentine, and 0.22 tons of water 0.1 tons of slag and limestone; after being weighed and weighed, it is lifted to the feeding platform by the elevator, and after being stirred evenly, it is evenly fed into the smelting furnace through the feeding door, and the material column height in the furnace is 3 meters. The air enters the melting furnace through the fan, the air pressure H=18mmHg, and the air volume Q=520Hm 3 / h, hot air temperature 300°C, reducing atmosphere CO in the furnace 2 / CO=0.6 (volume ratio) After the material is dried and preheated, the solid content is 90%. Chemical decomposition is carried out at a high temperature of 1200°C, the hydroxide in the original material becomes an...
Embodiment 2
[0087] Composition of electroplating sludge: Cr(OH) 3 6.21%, Cu(OH) 2 0.55%, Zn(OH) 2 0.86%, Ni(OH) 2 0.42%, Fe(OH) 2 1.89%, moisture is 87.21%, and other impurities are 2.86%. After the above sludge is dried by a drum dryer, weigh 1 ton, weigh 0.7 tons of coke, 0.1 tons of quartz stone, 0.16 tons of limestone, 0.1 ton of water slag is lifted to the feeding platform by the hoist after being weighed and weighed. After being stirred evenly, it is evenly fed into the melting furnace through the feeding door. =550Hm 3 / h, the hot air temperature is 330°C, and the reducing atmosphere in the furnace is CO 2 / CO=0.74 (volume ratio) After the material is dried and preheated, the solid content is 95%. Chemical decomposition is carried out under the high temperature condition of 600°C, the hydroxide in the original material becomes oxide, and at the melting temperature of 1200°C, the material becomes liquid, in which the oxide is reduced to alloy by carbon monoxide or coke, a...
Embodiment 3
[0090] Composition of electroplating sludge: Cr(OH) 3 7.18%, Cu(OH) 2 0.67%, Zn(OH) 2 0.71%, Ni(OH) 2 0.37%, Fe(OH) 2 1.43%, moisture is 87.38%, and other impurities are 2.26%. After the above sludge is dried by a drum dryer, weigh 1 ton, weigh 0.88 tons of coke, 0.05 tons of dolomite, 0.16 tons of quartz stone, and 0.25 tons of water slag. Lift to the feeding platform, after stirring evenly, evenly feed into the melting furnace through the feeding door, the height of the material column in the furnace is 3 meters, the air pressure H=23mmHg, the air volume Q=600Hm 3 / h, hot air temperature 350°C, reducing atmosphere CO in the furnace 2 / CO=0.95 (volume ratio) After the material is dried and preheated, the solid content is 97%. Chemical decomposition is carried out under the high temperature condition of 800 °C, the hydroxide in the original material becomes oxide, and at the melting temperature of 1400 °C, the material becomes liquid, and the oxide is reduced to all...
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