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X. Wu
CSC Technology Commercial Experimental Research
Treatment of Zinc Leaching Residue
(1) Test furnace type: double-area CSC smelting furnace with an area of 3.6 m
2
(smelting area of 2.16 m
2 and fuming area of 1.44 m
2 ).
(2) Test capacity: 100 t/d.
(3) Test flow: The furnace charge consists of leach slag, coal, flux, etc. It is added
from the smelting area. Control the concentration of oxygen enrichment at 60–
80%, combustion coefficient at 0.95, and smelting area temperature at 1150–
1200 °C. The furnace charge is melted, sulfate decomposed, the produced dust
contains 30–40%, which can be sold, and molten slag flows into the fuming area.
Using pulverized coal as reducing agent and fuel, the temperature is controlled
at 1250 °C, the combustion coefficient is 0.5–0.7, zinc and lead are volatilized
in the fuming area to obtain secondary zinc oxide smoke and dust, which are
sold out. See Fig. 5 for process flow.
(4) Research results of the test:
Fig. 5 Process flow chart of CSC technology for zinc leaching residue treatment