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Method of treating lead-zinc material with four continuous furnaces

A lead-zinc and material technology, applied in the field of metallurgy, can solve the problems of small bed capacity, high cost, and non-compact structure, and achieve the effect of reducing cost, low energy consumption, and compact structure

Inactive Publication Date: 2018-07-27
YUNNAN CHIHONG ZINC & GERMANIUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above process, electric heating front bed insulation is required, the electric heating front bed has high energy consumption, high cost, and uncompact structure. During the fuming process of the fuming furnace, the output zinc oxide dust contains high F, Cl and As, and the bed capacity is small.

Method used

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  • Method of treating lead-zinc material with four continuous furnaces

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] 1) Use a bed area of ​​10m 2 Oxygen-enriched top-blown furnace, the lead concentrate and limestone are batched according to the weight ratio of 100:1, and pelletized into pellets through a cylinder, with a particle size of 5mm and a moisture content of 6%; wherein limestone is added as a slagging agent, and the The main components of the lead concentrate are 55% lead, 3% zinc, and 15% sulfur, the iron powder contains Fe: 98%, and the limestone contains CaCO 3 :80%;

[0037] 2) Send the pellets obtained in step 1) continuously and evenly to the oxygen-enriched top-blown furnace with a belt conveyor. The top spray gun is sprayed in, and the furnace top spray gun is a liftable furnace top spray gun arranged perpendicular to the furnace roof. The pulverized coal addition is 3% of the pellet addition, and the pulverized coal particle size is -200 mesh 80% , which contains 53.5% carbon, 1.5% sulfur, 35% ash, and 20% volatile matter. The amount of oxygen-enriched air added i...

Embodiment 2

[0046] 1) Use a bed area of ​​10m 2 Oxygen-enriched top-blown furnace, the lead concentrate and limestone are batched according to the weight ratio of 100:3, and pelletized into pellets through a cylinder, with a particle size of 10mm and a moisture content of 9%; wherein limestone is added as a slagging agent, and the The main components of the lead concentrate are 60% lead, 5% zinc, and 20% sulfur, the iron powder contains Fe: 98%, and the limestone contains CaCO 3 :80%;

[0047] 2) Send the pellets obtained in step 1) continuously and evenly to the oxygen-enriched top-blown furnace with a belt conveyor. The top spray gun is sprayed into, and the top spray gun of the oxygen-enriched top-blown furnace is a liftable top spray gun arranged perpendicular to the furnace roof, and the pulverized coal addition is 9% of the pellet addition, and the pulverized coal particle size is -200 mesh 80%, which contains 52% carbon, 1% sulfur, 36% ash, 18% volatile matter, and the amount of ...

Embodiment 3

[0056] 1) Use a bed area of ​​10m 2 Oxygen-enriched top-blown furnace, the lead concentrate and limestone are batched according to the weight ratio of 100:5, and pelletized into pellets through a cylinder, with a particle size of 15mm and a moisture content of 12%; wherein limestone is added as a slagging agent, and the The main components of the lead concentrate are 65% lead, 7% zinc, and 25% sulfur, the iron powder contains Fe: 98%, and the limestone contains CaCO 3 :80%;

[0057] 2) Send the pellets obtained in step 1) continuously and evenly to the top-blown furnace with a belt conveyor, the pellets added is 40t / h, and then the pulverized coal and oxygen-enriched air are sprayed from the top-blown furnace of the oxygen-enriched top-blown furnace together Injection, the oxygen-enriched top-blown furnace roof lance is a liftable roof lance arranged perpendicular to the furnace roof, the pulverized coal addition is 15% of the pellet addition, and the pulverized coal particle...

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Abstract

The invention discloses a method of treating a lead-zinc material with four continuous furnaces. The method treats the lead-zinc material with combination of oxygen-enriched top blowing, side blowingreduction, side blowing melting and fuming blowing. The method is high in ability of treating the lead-zinc material, compact in structure, low in concentration of produced flue gas and stable in SO2,can separate zinc oxide smoke dust containing high F, Cl and As from zinc oxide smoke dust containing low F, Cl and As, is beneficial to subsequent separation treatment of zinc oxide, is efficient and saves the energy.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, in particular to a method for treating lead-zinc materials in four continuous furnaces. Background technique [0002] There are many processing techniques for lead-zinc materials, and the commonly used processing methods mainly include "three consecutive furnaces", that is, oxygen bottom blowing furnace (top blowing furnace or side blowing furnace) + oxygen bottom blowing furnace (top blowing furnace or side blowing furnace) + Fuming furnace. The fuming furnace of this process has the disadvantages of small bed capacity and high production cost without adding zinc-containing materials such as lead-zinc symbiotic ore and zinc leaching slag; There is a low concentration of SO in the flue gas 2 Unstable, high treatment cost, high content of F, Cl and As in zinc oxide fume, greatly increasing the treatment cost of zinc oxide fume. Chinese patent CN201410200207.3 "Oxygen-enriched top-blown smelt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/34C22B19/30C22B13/02
CPCC22B13/02C22B19/30C22B19/34Y02P10/20
Inventor 吴红林马雁鸿罗永光蒋荣生俞兵王勇马绍斌代龙果
Owner YUNNAN CHIHONG ZINC & GERMANIUM
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