一种利用氧化熔炼及碳热还原处理氧硫铅锌物料的方法

By treating oxygen, sulfur, lead, and zinc materials through oxidation smelting and carbothermic reduction, the problems of high energy consumption and large carbon emissions in existing technologies have been solved, achieving efficient recovery of lead and zinc metals and improving the recovery rate of valuable metals.

CN118703780BActive Publication Date: 2026-07-17KUNMING METALLURGY INST
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
KUNMING METALLURGY INST
Filing Date
2024-06-28
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies for recovering valuable lead and zinc metals from oxygen, sulfur, lead, and zinc materials suffer from high energy consumption, long processes, high carbon emissions, and large amounts of hazardous waste. There is a lack of efficient, clean, and low-carbon smelting technologies.

Method used

Oxidative smelting and carbothermic reduction are used to process oxygen-sulfur-lead-zinc materials. The materials are mixed with limestone and quartz sand and raw coal, and then smelted in an oxygen-enriched furnace before being carbothermicly reduced. The temperature is controlled in stages and coke is added to achieve efficient recovery of lead and zinc.

Benefits of technology

It has achieved low-carbon, short-process recycling of lead and zinc, with a lead volatilization rate of over 98% and a zinc volatilization rate of over 95%, reducing energy consumption and improving the recovery level of valuable metals.

✦ Generated by Eureka AI based on patent content.

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Abstract

本发明公开了一种利用氧化熔炼及碳热还原处理氧硫铅锌物料的方法，属于金属冶炼技术领域。氧硫铅锌物料与石灰石、石英砂、原煤混合，投料量为10～20t / h。向炉内加入氧气800～3000Nm³ / h，空气7000～15000Nm³ / h，粉煤0.5～1t / h，富氧浓度35~45%，保持1100~1250℃熔炼3~3.5h。将氧化铅锌热熔体加入矿热炉，加入焦炭0.5～1.0t / h，保持1000℃直至热熔渣铅含量＜0.5%，得到铅金属和锌热熔体。继续加入焦炭0.4~0.6t / h，保持1000～1300℃直至热熔体锌含量＜15%，得到锌金属和锌热熔渣。继续加入石灰石、石英砂、焦炭，焦炭含C量为还原Zn理论量的1.0~1.8倍，保持1300～1350℃直至热熔渣锌含量＜2%，得到锌金属和炉渣。铅金属除杂后铸锭，锌金属熔铸成锌锭。通过协调氧化熔炼与碳热还原处理工艺，提升了铅、锌的回收水平。
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