Application of the blast furnace to zinc smelting

Morgan, S. W. K.; Woods, S. E.

doi:10.1179/mtlr.1971.16.1.161

Metallurgical Reviews

1971

DOI: 10.1179/mtlr.1971.16.1.161

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Application of the blast furnace to zinc smelting

S. W. K. Morgan¹,

S. E. Woods²

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“…The production of zinc by the Imperial Smelting Process (ISP) is well established. 1,2 Lead is also produced as a useful by-product since the feed contains lead oxides. Smelting still produces a significant, but minor, quantity of the world's zinc, the rest being produced by the electrolysis of zinc sulphate.…”

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Zinc reoxidation in the shaft of a zinc–lead Imperial Smelting Furnace—1: zinc–carbon–oxygen system with deposition initiated on a quartz substrate and subsequent propagation on zinc oxide

Cox¹,

Fray²

2000

Mineral Processing and Extractive Metallurgy

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At temperatures, T , less than 750°C a distinct correlation was found between the deposition rate, R , excess zinc partial pressure (p Zn -p e Zn ) and zinc oxide morphology. Furthermore, the deposition rate at >850°C was significantly greater than that at <750°C, the greater thermodynamic driving force losing out to the reduced temperature kinetic effect. Two distinct types of crystals were produced for the two temperature ranges, indicating two different mechanisms of formation. At 750°C < T < 850°C a complex mixed morphology was observed. At >800°C 5 vol% hydrogen added to the gas stream increased the deposition rate by one order of magnitude-an effect that is attributed to the alternative reoxidation reaction Zn(v) + H 2 O(v) = ZnO + H 2 (g)At <760°C the increase is much less pronounced and is thought to be due to elevated CO 2 levels arising from the reaction CO(g) + H 2 O(g) = H 2 (g) + CO 2 (g) Carbon deposition was observed separately in the presence of furnace sinter and sulphuric acid. This was most probably caused by sulphur from these two sources. When they were absent carbon deposition via the reaction Zn(v) + CO(g) = ZnO + C was not observed, indicating that CO is not a viable oxidizing species in the process.

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confidence: 99%

Zinc reoxidation in the shaft of a zinc–lead Imperial Smelting Furnace—1: zinc–carbon–oxygen system with deposition initiated on a quartz substrate and subsequent propagation on zinc oxide

Cox¹,

Fray²

2000

Mineral Processing and Extractive Metallurgy

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Zinc-lead blast furnace—the key developments

Temple¹

1980

Metall Trans B

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Energy Conservation in the Zinc-Lead Blast Furnace

Hopkins

Richards

1978

JOM

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Application of the blast furnace to zinc smelting

Cited by 4 publications

References 0 publications

Zinc reoxidation in the shaft of a zinc–lead Imperial Smelting Furnace—1: zinc–carbon–oxygen system with deposition initiated on a quartz substrate and subsequent propagation on zinc oxide

Zinc reoxidation in the shaft of a zinc–lead Imperial Smelting Furnace—1: zinc–carbon–oxygen system with deposition initiated on a quartz substrate and subsequent propagation on zinc oxide

Zinc-lead blast furnace—the key developments

Energy Conservation in the Zinc-Lead Blast Furnace

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