Processing and utilizing method for extracting carbon and iron from blast furnace metallurgy dust and sludge
A technology for metallurgical sludge and blast furnace, applied in chemical instruments and methods, wet separation, centrifuges with rotating drums, etc. Conducive to floc dispersing, enhancing selectivity and reducing the effect of overgrinding
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Embodiment 1
[0018] Main raw materials: metallurgical dust; caustic starch; diesel oil; n-amyl alcohol; sodium hexametaphosphate
[0019] The total iron grade of the metallurgical dust sludge used is 25.00%, SiO 2 14.00%, fixed carbon content is 26.45%, SO 3 is 4.21%, CaO is 5.80%, ZnO is 5.74%, and Cl is 0.78%. Iron minerals mainly exist in the form of hematite, magnetite and elemental iron, and metallurgical dust contains a large amount of polyacrylamide.
[0020] The metallurgical dust is coarsely and subdivided by the hydrocyclone, and the classification particle size is 0.105mm. The coarse-grained products are ground by a rod mill and then returned to the classification operation. The fineness of the classified products is -200 mesh, accounting for 95%.
[0021] The graded fine-grained products go through a horizontal centrifugal concentrator for one roughing and one beneficiation, and the sorted concentrate products are filtered and dehydrated to obtain iron concentrates for smeltin...
Embodiment 2
[0025] Main raw materials: metallurgical dust; caustic starch; diesel oil; n-amyl alcohol; sodium hexametaphosphate
[0026] The total iron grade of metallurgical dust sludge used is 23.65%, SiO 2 13.59%, fixed carbon content is 27.55%, SO 3 is 3.89%, CaO is 5.62%, ZnO is 4.67%, and Cl is 0.52%. Iron minerals mainly exist in the form of hematite and magnetite, and metallurgical dust contains a large amount of polyacrylamide.
[0027] The metallurgical dust is coarsely and subdivided by the hydrocyclone, and the classification granularity is 0.105mm. The coarse-grained products are ground by a rod mill and then returned to the classification operation. The fineness of the classified products is -200 mesh, accounting for 98%.
[0028] The graded fine-grained products go through a horizontal centrifugal concentrator for one roughing and one beneficiation, and the sorted concentrate products are filtered and dehydrated to obtain iron concentrates for smelting. The operating cond...
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