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Technology for recycling tail gas of closed type ore-smelting zinc powder electric furnace

A closed, zinc powder technology, applied in furnaces, waste heat treatment, furnace components, etc., can solve problems such as high labor intensity and high risk, and achieve the effects of improving equipment automation, saving resources, and saving costs

Inactive Publication Date: 2018-06-15
四川四环锌锗科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally, the reverberatory furnace and the burning of lump coal are used to dry coke, which requires an average daily consumption of 800kg of lump coal, and at least 2 workers are required for baking operation, which is labor-intensive and dangerous.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment provides a closed-type submerged hot zinc powder electric furnace tail gas recycling process, including:

[0022] The zinc powder electric furnace exhaust gas containing 70% carbon monoxide is transported from the top of multiple condensers to the gas storage tank through a 100mm delivery pipe; 3 The tail gas of the zinc powder electric furnace is passed into the drying kiln loaded with 700kg / h coke at a flow rate of 18m / s, the rotation speed in the drying kiln is controlled to 25r / min, the temperature is 500°C, and the combustion tail gas is dried for 4 hours. Then put the coke into the closed electric furnace of submerged hot zinc powder for reaction.

Embodiment 2

[0024] This embodiment provides a closed-type submerged hot zinc powder electric furnace tail gas recycling process, including:

[0025] The zinc powder electric furnace exhaust gas containing 90% carbon monoxide is transported from the top of multiple condensers to the gas storage tank through 110mm delivery pipes; 3 The tail gas of the zinc powder electric furnace is passed into the drying kiln loaded with 700kg / h coke at a flow rate of 18m / s, the speed in the drying kiln is controlled to 25r / min, the temperature is 500°C, and the combustion tail gas is dried for 6 hours. Then put the coke into the closed electric furnace of submerged hot zinc powder for reaction.

Embodiment 3

[0027] This embodiment provides a closed-type submerged hot zinc powder electric furnace tail gas recycling process, including:

[0028] The zinc powder electric furnace tail gas containing 80% carbon monoxide is transported to the gas storage tank through the 108mm delivery pipe from the top of multiple condensers in sequence; 3 The tail gas of the zinc powder electric furnace is passed into the drying kiln loaded with 700kg / h coke at a flow rate of 18m / s, the rotation speed in the drying kiln is controlled at 25r / min, the temperature is 500°C, and the combustion tail gas is dried for 5 hours. Then put the coke into the closed electric furnace of submerged hot zinc powder for reaction.

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Abstract

The invention belongs to the technical field of zinc smelting process improvement, and provides a technology for recycling tail gas of a closed type ore-smelting zinc powder electric furnace. The technology comprises the following steps of introducing 10m3 of zinc powder electric furnace tail gas into a drying kiln with 700-800kg / h of nut coke, controlling the rotating speed in the drying kiln tobe 25-30r / min and the temperature to be 500-600 DEG C, after burning the tail gas for 4-6 hours so as to dry the nut coke, and then putting the nut coke into the closed type ore-smelting zinc powder electric furnace for reaction. According to the technology, the technological characteristics of the closed type ore-smelting zinc powder electric furnace are utilized, a novel technology for baking the nut coke is achieved through the technological innovation and equipment upgrading and rebuilding, meanwhile, the production cost for baking the nut coke is lowered, the equipment automation is improved, resources are saved, and clean production is achieved.

Description

technical field [0001] The invention belongs to the technical field of zinc smelting process improvement, and in particular relates to a tail gas reutilization process of a closed submerged hot zinc powder electric furnace. Background technique [0002] At present, the principle of the closed submerged heat zinc powder electric furnace process is: use electric energy to convert heat energy to make the temperature in the furnace reach 1200°C. At this temperature, the following reactions occur between the furnace materials: ZnO+C=Zn+CO; ZnO+CO= Zn+CO 2 ;CO 2 +C=2CO; Most of the zinc in the raw material is reduced through the above reaction, and volatilizes into zinc vapor at high temperature, and produces a large amount of carbon monoxide; in order to obtain zinc powder, the zinc vapor enters the condensation system together with the tail gas (generally Three condensers connected in series) produce zinc powder, and the tail gas is discharged after being collected by bag dust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00C22B19/18
CPCF27D17/004C22B19/18
Inventor 黄锋郭起球
Owner 四川四环锌锗科技有限公司