Method for recovering zinc by using rotary kiln and device thereof

A rotary kiln and electric furnace technology, applied in the direction of improving process efficiency, can solve problems such as waste, ineffective recycling, environmental pollution, etc., and achieve good social and environmental benefits.

Inactive Publication Date: 2013-01-30
SUZHOU YONGJI REGENERATION RESOURCE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The above-mentioned blast furnace ash, gas mud, and electric furnace ash have a high zinc content, and are currently wasted because they cannot be effectively recycled, and this waste also pollutes the environment

Method used

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  • Method for recovering zinc by using rotary kiln and device thereof

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Embodiment Construction

[0014] The method and device for recovering zinc using a rotary kiln according to the present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0015] see figure 1 Shown is a schematic structural view of the rotary kiln zinc recovery device of the present invention, and the present invention will be described in detail below in conjunction with the device. The specific structure of the device is: comprising a rotary kiln 1, the gas outlet of the rotary kiln 1 is connected with the entrance of the settling chamber 2, the gas outlet of the settling chamber 2 is connected with the inlet of the surface cooler 3, and the gas outlet of the surface cooler 3 The centrifugal fan 4 communicates with the entrance of the dust collection chamber 5 .

[0016] The method for utilizing the rotary kiln to reclaim zinc of the present invention comprises the following steps: (1) mix electric furnace ash, anthracite and gas slime...

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Abstract

The invention discloses a method for recovering zinc by using a rotary kiln. The method comprises the steps of (1) mixing electric furnace dust, anthracitic coal and gas mud into blast furnace dust; (2) sending the mixture into the rotary kiln for high temperature combustion, so that zinc gas in the mixture is changed into gasified zinc; (3) sucking the gasified zinc into a settling chamber, and removing dust in the gasified zinc while cooling; (4) enabling the gasified zinc to continue to advance and enter a surface cooler, cooling quickly, and combining the gasified zinc and oxygen in the air to produce zinc oxide; and (5) sucking the zinc oxide into a dust chamber by a centrifugal fan, and storing and recovering after filtering by a cloth bag. The invention also discloses a special rotary kiln zinc recovering device for the method. The device comprises the rotary kiln, wherein a gas outlet of the rotary kiln is communicated with an inlet of the settling chamber, a gas outlet of the settling chamber is communicated with an inlet of the surface cooler, and a gas outlet of the surface cooler is communicated with an inlet of the dust chamber through the centrifugal fan. By the aid of the method and the device, zinc in the blast furnace dust, the gas mud and the electric furnace dust can be effectively recycled.

Description

technical field [0001] The invention relates to the technical field of recycling zinc by using a rotary kiln, in particular to a method and a device for recycling zinc by using a rotary kiln. Background technique [0002] In the blast furnace ironmaking process, the impurities contained in the iron ore, such as lead and zinc, are reduced, and form steam at high temperature, and are taken out of the furnace together with the fine dust of ore, coke, flux, etc., along with the blast furnace gas, and then It is captured and removed by the gas dust removal and purification system outside the furnace. The gas dust removal system is composed of gravity dust removal and fine dust removal. The dry coarse dust collected by the first stage is called gravity ash; the second fine dust collector generally adopts a dry bag filter or a wet dust removal system. The dry fine-grained dust obtained by conventional dedusting is called gas ash (also known as blast furnace ash, light ash); the sl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B19/30
CPCY02P10/20
Inventor 张弛李永祥于胜洲
Owner SUZHOU YONGJI REGENERATION RESOURCE
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