The Process and Application of Oxygen-Enriched Air Side Blown …
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Conclusions
In the oxidation stage, slag contains low sulfur; desulfurization rate is higher than the
design value. In production, higher oxygen concentration is applied, the temperature
difference of cooling water is lower than the design value, the daily throughput is
higher than the design value, and the coal rate is much lower than the design value.
The slag throughput in the reduction stage increases; the reduction dust is returned
to the reduction furnace, resulting in increase of the cold material. In addition, the
consumption of flux limestone and the heat required for limestone heating decomposition and heating are increased. The temperature rise of cooling return water is
lower than the design value with little heat carried off by the water jacket. In the
fuming stage, the slag throughput increases, and the pulverized coal rate is close to
the design value. The lead and zinc content in the slag are lower than the design value,
and the recovery is higher than the design value. In general, the process of oxygenenriched air side blown oxidation, oxygen- enriched air side blown reduction, and
zinc extraction by fuming furnace for the processing of lead-bearing polymetallic
materials is characterized by high desulfurization rate, high overall sulfur recovery,
good environmental protection effect, low energy consumption, and high recovery.
It is an environment-friendly new process worth popularizing.