Device for recovering zinc by using zinc-contained dust of steel and iron works and recovery method thereof

A technology for dust recovery and iron and steel plants, applied in the direction of recycling technology, process efficiency improvement, etc., can solve problems such as complex process, pollution, and ineffective effects, and achieve the effect of expanding the range of raw materials, saving coke, and increasing resource utilization

Active Publication Date: 2016-04-20
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the disadvantages of complex process, insignificant effect and great pollution to the environment in the existing recycling method, and to provide a zinc recycling device and recycling method using zinc-containing dust in iron and steel plants

Method used

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  • Device for recovering zinc by using zinc-contained dust of steel and iron works and recovery method thereof
  • Device for recovering zinc by using zinc-contained dust of steel and iron works and recovery method thereof
  • Device for recovering zinc by using zinc-contained dust of steel and iron works and recovery method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] [Example 1] A device for recovering zinc from iron and steel plant zinc-containing dust. The zinc recovery device includes: a blowing device, a hot blast stove, an enrichment furnace device, a recovery furnace device, and a high-zinc flue gas separation device. The collection furnace device, the recovery furnace device and the high-zinc flue gas separation device are connected in sequence, and the enrichment furnace device and the recovery furnace device are respectively connected with a blowing device and a hot blast stove.

[0026] The blowing device includes: a first batching bin, a second batching bin, a ball mill, a dust hopper, a blowing tank, a blowing pipeline, a mixer, a distributor and a spray gun. The spraying device adopts combined tank spraying, and the first batching bin and the second batching bin are arranged side by side, respectively containing agglomerated zinc-containing dust and zinc-containing dust that can be directly sprayed, and the agglomerated ...

Embodiment 2

[0034] [Example 2] This example is basically the same as the above example, the only difference is that the high-zinc flue gas separation device includes an oxidation separation device, and the oxidation separation device includes: a second coarse dust collector, a waste heat boiler, The second heat exchanger, spray scrubber, circulating pool, circulating pump, centrifugal dryer. The second coarse dust remover of the oxidation separation device is connected with the second flue of the recovery furnace, the second coarse dust remover, the waste heat boiler, the second heat exchanger, and the spray scrubber are connected in sequence, using a The rapping waste heat boiler prevents clogging. A circulating water pool is installed under the spray scrubber, a circulating water pump is installed in the circulating pool, a centrifugal dryer is installed next to the circulating pool, and a dehydrator is installed at the flue gas outlet of the spray scrubber.

[0035] After the high-zinc...

Embodiment 3

[0036] [Example 3] In this embodiment, the zinc recovery device includes: a blowing device, a hot blast stove, a recovery furnace device and a high-zinc flue gas separation device, and the recovery furnace device is respectively connected with the blowing device, the hot blast stove, the high The zinc fume separation device is connected, and the recovery furnace device includes: a recovery furnace and a coke preheating furnace, and the coke preheating furnace is arranged above the recovery furnace. The recovery furnace is connected with a blowing device and a hot blast stove. The recovery furnace includes: a second bell top charging device 8, a secondary tuyere 9, a second tuyere 10, a second flue 12, a second Two steel furnace shells 13, the second stave 14, the second refractory lining 11, the second iron hole 15, the second steel furnace shell 13, the second stave 14 and the second refractory lining 11 form a recovery furnace body, the lower part of the recovery furnace is ...

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Abstract

The invention relates to a device for recovering zinc by using zinc-contained dust of steel and iron works and a recovery method thereof. The zinc-contained dust of the steel and iron works is sprayed into an enriching furnace, or is added in the enriching furnace after being caked; zinc in the dust is reduced to zinc steam in the enriching furnace; generated zinc-contained smoke is leaded into a cloth bag dust collector after rough dust removal and afterheat recovery of a heat exchanger; zinc is oxidized as zinc oxide, and is captured on the cloth bag dust collector to obtain high-zinc dust; the high-zinc dust is sprayed into a recovery furnace; zinc in the dust is reduced as zinc steam in the recovery furnace; high-zinc smoke generated in the recovery furnace is captured by lead liquid in a condensation separation device; and liquid-stage rough zinc is obtained after separating liquid-state zinc from liquid-state lead. The high-zinc smoke generated in the recovery furnace also can be cooled by water in a spray washing tower, oxidized, captured and precipitated as zinc oxide mud after rough dust removal and afterheat recovery of an afterheat boiler and the heat exchanger; and the zinc oxide mud is centrifugally dried to obtain zinc oxide.

Description

technical field [0001] The invention belongs to the technical field of recycling by-products of iron and steel metallurgy, and in particular relates to a zinc recycling device and a recycling method thereof by using zinc-containing dust in iron and steel plants. Background technique [0002] In the prior art, zinc-containing dust treatment processes are mainly divided into pyrotechnics and wet processes. The wet process has a low leaching rate, is prone to secondary pollution, and does not match the steel plant equipment. The fire process mainly includes rotary kiln process and rotary hearth furnace process. The production efficiency of rotary kiln process is low, while the rotary hearth furnace process has high energy consumption and high equipment failure rate. Contents of the invention [0003] The purpose of the present invention is to overcome the disadvantages of complex process, insignificant effect and serious environmental pollution in existing recycling methods,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/30C21B3/04
CPCC21B3/04C21B2200/00C22B19/30Y02P10/20Y02W30/50
Inventor 程树森韩海龙周东东牛群徐文轩杨宽
Owner UNIV OF SCI & TECH BEIJING
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