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Method for processing zinc leaching residues at high proportion by using oxygen bottom blown furnace

A technology of zinc leaching slag and oxygen bottom blowing, which is applied in the direction of improving process efficiency, etc., to achieve the effect of less investment and transformation costs, and reducing environmental pollution

Active Publication Date: 2011-03-16
YUNNAN XIANGYUNFEILONG RESOURCES RECYCLING TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to use the high matching smelting ratio of the oxygen bottom blowing furnace to process zinc leaching slag, which has simple operation, high degree of mechanization and high metal recovery rate, and can effectively recover Pb, Zn, Cu, Ag, S, etc., avoid environmental pollution, and are well connected with acid production and reduction processes, reducing investment in transformation and operating costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] The lead concentrate and zinc leaching residue in Table 2 are used in the ratio of 40% lead concentrate and 60% zinc leaching residue (weight percentage).

[0032] Table 2 Composition of lead concentrate and zinc leaching residue (%)

[0033] element

[0034] Ag unit: g / t

[0035] According to process requirements, slag-making flux, circulating fume, fuel, sulfide, etc. are mixed and fully mixed by a disc granulator to form pellets. The composition is shown in Table 3:

[0036] Table 3 Composition of materials entering the furnace (%)

[0037] element

[0038] This mixture is continuously added to the high temperature molten pool of the oxygen bottom blowing furnace, and oxygen is continuously injected into the bottom. The mixture material undergoes complex melting, oxidative desulfurization, cross-reaction and slagging reactions, and high-temperature SO is produced respectively. 2 Smoke, crude lead, high-lead slag.

[0039] The mixture of this ratio runs continuously for 10...

example 2

[0044] The lead concentrate and zinc leaching residue in Table 5 are proportioned according to 38% lead concentrate and 62% leaching residue (weight percentage). The components of the zinc leaching residue in Table 5 have been mixed with sulfide in a certain proportion.

[0045] Table 5 Composition of lead concentrate and zinc leaching residue (%)

[0046]

[0047] Ag unit: g / t

[0048] According to the process requirements, slag-making flux, circulating fume, fuel, etc. are mixed and fully mixed by a disc granulator to form pellets. The composition is shown in Table 6:

[0049] Table 6 Composition of materials entering the furnace (%)

[0050] element

[0051] This mixture is continuously added to the high temperature molten pool of the oxygen bottom blowing furnace, and oxygen is continuously injected into the bottom. The mixture material undergoes complex melting, oxidative desulfurization, cross-reaction and slagging reactions, and high-temperature SO is produced respectively....

example 3

[0057] The lead concentrate and zinc leaching residue in Table 8 are proportioned according to 52% lead concentrate and 48% leaching residue (weight percentage). The composition of the zinc leaching residue item in Table 8 has been mixed with sulfide in a certain proportion.

[0058] Table 5 Composition of lead concentrate and zinc leaching residue (%)

[0059] element

[0060] Leaching residue 1

[0061] Ag unit: g / t

[0062] According to process requirements, slag-making flux, circulating fume, fuel, etc. are mixed and fully mixed by a disc granulator to form pellets. The composition is shown in Table 9:

[0063] Table 9 Composition of materials entering the furnace (%)

[0064] element

[0065] This mixture is continuously added to the high temperature molten pool of the oxygen bottom blowing furnace, and oxygen is continuously injected into the bottom. The mixture material undergoes complex melting, oxidative desulfurization, cross-reaction and slagging reactions, and high-...

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Abstract

The invention belongs to a pyrometallurgical technology of leaded materials and the like, in particular to an economic and harmless method for processing zinc leaching residues produced in a zinc hydrometallurgy process. In the technology, the intensified smelting characteristic of an oxygen bottom blown furnace is used, and sulfide is added to maintain heat balance of the smelting and accurately control oxidizing atmosphere, thus the added zinc leaching residues at high proportion can be subject to decomposition, desulfuration, scorification and the other chemical reactions in the oxygen bottom blown furnace, wherein the recovery rates of Pb, Zn, Cu, Ag, S and the other valuable metals in the zinc plant leaching residues are more than 99%.The method provided by the invention has the advantages of simple operation and high metal recovery rate; and in addition, in the method, resources are saved, i.e. wastes are comprehensively recovered, environmental contamination is avoided, the technological flow of a mature SKS lead smelting process can be used fully, and the comprehensive utilization level is improved.

Description

Technical field [0001] The invention belongs to the pyrometallurgical smelting process of materials containing lead and the like, in particular an economical and harmless treatment method for the leaching residue produced in the process of hydrometallurgical zinc smelting. Background technique [0002] Zinc leaching slag is a solid slag containing Pb, Zn, Cu, Ag, Sb, S, etc. produced in the process of hydro-zinc smelting, including zinc oxide (from the conventional leaching slag volatilization kiln treatment process) leaching slag and Lead-silver residue leached by hot acid. These zinc leaching residues not only have large yields (for example, the yield of lead-silver slag is 10-30%), but also has complex phase composition and high impurities, especially containing sulfate radicals and heavy metals. "Three preventions" are required during the storage process. It cannot be smelted directly. [0003] In China, sintering and blast furnace treatment are generally used in combination ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B13/02
CPCY02P10/20
Inventor 徐培伦韩开远吴飞李建军
Owner YUNNAN XIANGYUNFEILONG RESOURCES RECYCLING TECH CO LTD
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