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Compound metallurgy furnace for efficiently removing fluorine and chlorine impurities in zinc oxide smoke

A zinc oxide and metallurgical furnace technology, applied in the field of metallurgy, can solve the problems of high processing cost, large zinc loss, large equipment investment, etc., and achieve the effects of improving productivity, easy process and simple operation

Active Publication Date: 2017-03-15
YUNNAN CHIHONG ZINC & GERMANIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-temperature roasting removal method has a fluorine removal rate of over 90% and a chlorine removal rate of over 80%, and the removal effect is better, but the equipment investment is large, the fuel consumption is large, and the processing cost is high; the alkali washing method defluorination The rate can reach 90%, the equipment and operation are simple, but the loss of zinc is large, the consumption of water resources is large, and the wastewater is difficult to treat; the removal of zinc sulfate solution will lead to a certain amount of metal loss, and the defluorination effect is not good.

Method used

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  • Compound metallurgy furnace for efficiently removing fluorine and chlorine impurities in zinc oxide smoke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Open the slag inlet 10, add 40t of reduced slag (Pb1-6%, Zn5-12%) into the smelting chamber 1, and close the slag inlet 10;

[0031] (2) Open the tuyeres 8 and 9 of the smelting chamber 1 and the volatilization chamber 2, and blow pulverized coal and oxygen-enriched air into the smelting chamber 1 and the volatilization chamber 2 respectively through the tuyeres 8 of the smelting chamber 1 and the volatilization chamber 2 , Blast air into the smelting chamber 1 and the volatilization chamber 2 respectively through the tertiary tuyeres 9 of the smelting chamber 1 and the volatilization chamber 2; and adjust the air volume blown into the smelting chamber 1 tuyere 8 to be 8000m³ / h, the wind pressure to be 180KPa, and the oxygen-enriched The concentration is 23%, the amount of pulverized coal is 1.3t / h; the air volume blown into the volatilization chamber 2 blast outlet 8 is adjusted to 10000m³ / h, the wind pressure is 180KPa, the oxygen enrichment concentration is 23%, a...

Embodiment 2

[0039] (1) Open the slag inlet 10, add 30t of reduced slag (Pb2-5%, Zn6-14%) into the smelting chamber 1, and close the slag inlet 10;

[0040] (2) Open the tuyere 8 and the tertiary tuyere 9 of the smelting chamber 1 and the volatilization chamber 2, and blow pulverized coal and oxygen-enriched air into the smelting chamber 1 and the volatilization chamber 2 respectively through the tuyere 8 of the smelting chamber 1 and the volatilization chamber 2, Air is blown into the smelting chamber 1 and the volatilization chamber 2 respectively through the tertiary tuyeres 9 of the smelting chamber 1 and the volatilization chamber 2; the air volume blown into the smelting chamber 1 tuyere 8 is adjusted to 10000m³ / h, the wind pressure is 160KPa, and the oxygen-enriched concentration is 21%, the amount of pulverized coal is 1.5t / h; the air volume blown into the volatilization chamber 2 blast outlet 8 is adjusted to 12000m³ / h, the wind pressure is 160KPa, the oxygen enrichment concentrati...

Embodiment 3

[0048] (1) Open the slag inlet 10, add 60t of reduced slag (Pb3-7%, Zn8-14%) into the smelting chamber 1, and close the slag inlet 10;

[0049] (2) Open the tuyere 8 and the tertiary tuyere 9 of the smelting chamber 1 and the volatilization chamber 2, and blow pulverized coal and oxygen-enriched air into the smelting chamber 1 and the volatilization chamber 2 respectively through the tuyere 8 of the smelting chamber 1 and the volatilization chamber 2, Blast air into the smelting chamber 1 and the volatilization chamber 2 respectively through the tertiary tuyeres 9 of the smelting chamber 1 and the volatilization chamber 2; adjust the air volume blown into the smelting chamber 1 tuyere 8 to be 12000m³ / h, the wind pressure to be 200KPa, and the oxygen-enriched concentration to be 25%, the amount of pulverized coal is 1.6t / h; the air volume blown into the volatilization chamber 2 blast outlet 8 is adjusted to 14000m³ / h, the wind pressure is 200KPa, the oxygen enrichment concentrat...

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Abstract

The invention relates to a compound metallurgy furnace for efficiently removing fluorine and chlorine impurities in zinc oxide smoke, and belongs to the technical field of metallurgy. The compound metallurgy furnace comprises an internal separation wall, a smelting dust collecting flue, a volatilization dust collecting flue, a cooling water jacket, a communicator, an air blowing port, a ternary air port, a slag adding port, a cold charge adding port, a slag discharge port and a furnace foundation. A smelting chamber and a volatilization chamber are separated through the internal separation plate to exert different functions; the melting of acid leaching slag is accelerated in the smelting phase; after the acid leaching slag is oxidized and smelted, such impurities as fluorine, chlorine and sulfur in the zinc oxide smoke can be efficiently removed in the smelting phase, and meanwhile, the volatilization of such valuable metals as zinc is reduced; a reducing atmosphere is in the volatilization chamber to generate a lot of CO, so that the higher reducibility is kept, the improvement of the lead and zinc volatilization efficiency is facilitated, and the recovery of the valuable metal is improved; and the compound metallurgy furnace has the advantages of simple operation, easy process control and capability of effectively improving the productivity.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a compound metallurgical furnace for efficiently removing fluorine and chlorine impurities in zinc oxide dust. Background technique [0002] The methods for removing fluorine and chlorine from zinc oxide fume mainly include: high temperature roasting to remove fluorine and chlorine (multiple hearth furnace, rotary kiln), alkali washing method to remove fluorine and chlorine, zinc sulfate solution to remove fluorine and chlorine, etc. The high-temperature roasting removal method has a fluorine removal rate of over 90% and a chlorine removal rate of over 80%, and the removal effect is better, but the equipment investment is large, the fuel consumption is large, and the processing cost is high; the alkali washing method defluorination The rate can reach 90%, the equipment and operation are simple, but the loss of zinc is large, the consumption of water resources is la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/30
CPCC22B19/30Y02P10/20
Inventor 马雁鸿贾著红罗永光蒋荣生张良红李衍林俞兵吴红林代龙果薛灿马绍斌王瑞山
Owner YUNNAN CHIHONG ZINC & GERMANIUM