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Oxygen-enriched fuming Zn extraction process of plumbum smelting slag

A lead smelting and oxygen enrichment technology, applied in the direction of improving process efficiency, can solve problems such as high processing cost, production capacity limitation, furnace production limitation, etc., and achieve the effect of shortening production time and reducing processing cost.

Inactive Publication Date: 2008-04-23
HENAN YUGUANG GOLD & LEAD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] Because the oxygen required by the fuming furnace in the traditional process is only supplemented by the oxygen in the air blown by the blower, and the oxygen content in the air is only about 21%, the production of the furnace is limited, the furnace time is long, the processing cost is high, Capacity is limited

Method used

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Embodiment

[0014] Embodiment: The present invention includes using a blower to pass pulverized coal and air into the slag of the fuming furnace, so that the PbO and ZnO in the slag are reduced in the state of elemental metal, and the oxygen in the air supplemented through the three tuyeres on the upper part of the furnace After oxidation, the secondary zinc oxide product mainly composed of ZnO is produced. The oxygen-enriched fuming zinc extraction process also includes the following steps:

[0015] Step 1: Use the shutdown time of the fuming furnace to erect special oxygen or oxygen-enriched pipelines and purge the pipelines as required;

[0016] Step 2: After the fuming furnace is put into production, supply oxygen or enriched oxygen to it, so that the oxygen concentration in the air entering the furnace reaches 22%-30%;

[0017] The third step: correspondingly increase the pulverized coal consumption into the furnace by 15%-32%;

[0018] Step 4: After reaching the end point of blowin...

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Abstract

The invention discloses a zinc extracting method from rich oxygen smoke of lead smelting furnace, which is characterized by the following: reducing PbO and ZnO at elementary metal pattern; supplementing air from vent on the furnace; oxidizing the zinc suboxide; bridging oxygen or rich oxygen pipe in the smoke furnace with oxygen density to 22-30%; improving coal ash quantity by 15-32%; discharging slag after reaching the blowing terminal; shortening time by 10-40 min.

Description

technical field [0001] The invention relates to an oxygen-enriched fuming and zinc-extracting process for lead smelting slag obtained by fuming and zinc-extracting the lead smelting final slag produced in the lead smelting industry. Background technique [0002] At present, more than 90% of the final lead smelting slag produced in the lead smelting process is carried out by traditional fuming furnaces in the process of fuming zinc extraction (containing Pb at 1%-5%, ZnO at 10%-19%) In production, blowers are used to pass pulverized coal and air into the slag of the fuming furnace, and the reducing atmosphere in the furnace is adjusted by controlling the amount of air introduced, so that PbO and ZnO in the slag can be reduced in the state of elemental metal , Oxygen in the air supplemented by the three tuyeres on the upper part of the furnace is oxidized to produce secondary zinc oxide products mainly composed of ZnO. [0003] Because the oxygen required by the fuming furnac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B19/00C22B7/00
CPCY02P10/20
Inventor 王拥军郭占江刘合全卫东红王新红
Owner HENAN YUGUANG GOLD & LEAD
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