Cleaning and dust collecting method of volatilized zinc oxide and device thereof

A zinc oxide and sub-zinc oxide technology, applied in chemical instruments and methods, combined devices, separation methods, etc., can solve the problems of serious dust environment pollution, no solution to bag dust collection process, and high labor intensity of workers. The effect of shortening the process flow, reducing the cooling area and fast response

Inactive Publication Date: 2010-08-18
广西冶金研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The labor intensity of the workers is high, the dust pollutes the environment seriously, and the operators are prone to SO 2 Poisoning or occupational diseases of the respiratory tract and lungs
[0005] At present, there is no report on the method to solve the above disadvantages of the bag dust collection process

Method used

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  • Cleaning and dust collecting method of volatilized zinc oxide and device thereof
  • Cleaning and dust collecting method of volatilized zinc oxide and device thereof
  • Cleaning and dust collecting method of volatilized zinc oxide and device thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] With reference to Fig. 2, the cleaning and dust collecting device of volatile zinc oxide according to the present invention mainly consists of a disc feeder 1, a belt conveyor 2, a bucket elevator 3, a metallurgical furnace 4, a waste heat boiler 5, a surface cooler 6, Air compressor 7, spray water inlet 81, 82, 83, cloth bag chamber 9, high-pressure air inlet 10, spiral sprayer 11, spray-bag tower 12, surface cooling flue gas inlet 13, slurry outlet 14, Slurry pool 15, slurry pump 16, filtrate pool 17, water pump 18, filter press 19, induced draft fan 20, chimney 21, Venturi dust collector 22, flue gas outlet 23, slurry outlet 24 and other parts constitute.

[0032] Taking the metallurgical furnace 4 as a rotary kiln as an example, the connection mode and working process of the cleaning and dust collection device for volatilizing zinc oxide are as follows:

[0033] According to the coking coal rate of 50wt%, that is, zinc leaching slag: coke powder is 1:0.5wt, the zinc...

Embodiment 2

[0036] This embodiment is a detailed description of the structure and application of the spray-bag tower.

[0037] Contrasting with Fig. 3, the spray-bag tower of the cleaning and dust collecting device of volatilized zinc oxide of the present invention, the spray-bag tower is the core device of the present invention, mainly consists of spray water inlet 81, 82, bag chamber 9, high pressure Gas inlet 10, spiral shower 11, spray-bag tower 12, flue gas inlet 13 from surface cooling, slurry outlet 14, bag holder 25 and furnace top outlet pipe 26 constitute.

[0038] The connection mode and working process of the spray-bag tower of the cleaning and dust collecting device of described volatile zinc oxide are as follows:

[0039]The spray-bag tower is a columnar body, which is divided into three sections. From the bottom of the tower, the first and second sections use two spiral showers 11 to realize uniform spraying, and the third section is the baghouse 9. Cloth bag holder 25 is ...

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Abstract

The invention relates to a cleaning and dust collecting method of volatilized zinc oxide and a device thereof. Low grade zinc material is reduced and volatilized in a metallurgical furnace with reducing atmosphere; volatilized flue gas enters a spraying-cloth bag tower via an oxidizing chamber and a surface cooler; the zinc oxide in the flue gas is collected; fluorine and chlorine enter spraying solution; sulfur dioxide forms ZnSO3 to enter secondary zinc oxide paste; after the secondary zinc oxide paste is separated through filter pressing, the filter liquor returns to be circularly used; and filter residue is secondary zinc oxide product. The invention has the advantages that fluorine, chlorine and sulfur dioxide in the flue gas can be removed during the dust collection process, so as to enable the secondary zinc oxide to be directly used as the raw material for producing electrolytic zinc, the technological process can be reduced, the investment can be saved, and the invention is energy-saving and environment protective.

Description

1. Technical field [0001] The invention relates to the technical field of nonferrous metal smelting, in particular to a cleaning and dust collection method and device for volatilizing zinc oxide. 2. Background technology [0002] Electrolytic zinc leaching slag, smelting chimney ash and other low-grade zinc oxide materials have low zinc content. Generally, the high-temperature reduction process is used to volatilize the zinc in the zinc-containing materials into the furnace gas by taking advantage of the strong volatility of zinc at high temperatures. , After the furnace gas is re-oxidized, it is recovered in the form of sub-zinc oxide by dust collection. [0003] The dust collection process currently adopts dry dust collection, that is, after the high-temperature flue gas is cooled by the water-cooled flue and the surface cooler, it is cooled from 1200-1350°C to 130-200°C, and then enters the bag filter to be collected. The secondary zinc oxide collected by this process is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B19/34B01D50/00
CPCY02P10/20
Inventor 陈均宁何航军黄进文刘晨陈克勤白盈盈黄金莲
Owner 广西冶金研究院有限公司
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