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Method for producing iron-containing slag and high zinc materials through cloth bag dedusting ash

A technology of bag dust removal and high zinc, which is applied in the direction of improving process efficiency, etc., can solve the problems of insufficient recycling of bag dust removal, cumbersome, long process flow of recycling methods, etc., to achieve significant social benefits, simplify processes, and reduce forecasts. The effect of processing

Inactive Publication Date: 2018-05-15
杜海东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that the prior art does not fully recycle the high-value non-ferrous metal zinc in the bag dust removal ash, and the recovery process is long and cumbersome.

Method used

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  • Method for producing iron-containing slag and high zinc materials through cloth bag dedusting ash

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The length of the rotary kiln used in this embodiment is 38 meters, and the diameter is 2.5m. The rotating speed is adjusted according to the output, and the reaction time of the control charge in the rotary kiln is about 3-4h;

[0044] Mix 85% blast furnace dry bag ash, 10% additives, 3% coke powder and 2% low-zinc dedusting powder evenly, and enter the rotary kiln from the tail of the rotary kiln through the receiving hopper and belt conveyor, and the kiln head is driven by a blower at high speed Air is blown in, the mixture is burned in the rotary kiln, and the average temperature reaches 1230°C, so that the zinc oxide in the bag ash is reduced and enters the flue gas. Lead out to the two-stage cooling pipe, collect the high-zinc material through the bag filter, and the flue gas after the bag filter is desulfurized and then discharged into the atmosphere. The iron-containing slag after the combustion reaction is discharged from the kiln head, and the discharged iron-...

Embodiment 2

[0057] The rotary kiln used in the present embodiment is identical with embodiment 1;

[0058] Mix 87% of blast furnace dry bag ash, 6% of additives, 4% of coke powder and 3% of low-zinc dust removal powder, and enter the rotary kiln from the tail of the rotary kiln through the receiving hopper and belt conveyor, and the kiln head is driven by a blower at high speed The air is blown in, the mixture is burned in the rotary kiln, and the average temperature reaches 1250°C, so that the zinc oxide in the bag ash is reduced and enters the flue gas. Lead out to the two-stage cooling pipe, collect the high-zinc material through the bag filter, and the flue gas after the bag filter is desulfurized and then discharged into the atmosphere. The iron-containing slag after the combustion reaction is discharged from the kiln head, and the discharged iron-containing slag is treated by water quenching, and the treated iron-containing slag is crushed and screened before being used for sinterin...

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Abstract

The invention discloses a method for producing iron-containing slag and high zinc materials through cloth bag dedusting ash. The method comprises the steps that a mixed material containing 80%-95% ofthe cloth bag dedusting ash in weight percentage is burnt, restored, oxidized and collected to obtain the high zinc materials and the iron-containing slag. By means of the method for producing the iron-containing slag and the high zinc materials through the cloth bag dedusting ash, the cloth bag dedusting ash is efficiently recovered and processed, the process technological flow is simple, valuable elements in the cloth bag dedusting ash are extracted, the added value of the cloth bag dedusting ash is increased, the method has important practical significance in cleaning production, energy conservation and emission reduction in the iron and steel industry, and the method is suitable for industrialization large-scale production and application.

Description

technical field [0001] The invention relates to the field of solid waste recycling, in particular to a method for producing iron-containing slag and high-zinc material from bag dust removal ash. Background technique [0002] Blast furnace dry bag dust is the iron-containing dust produced in the blast furnace gas dust removal process. The blast furnace gas passes through the gravity dust collector and cyclone dust collector to remove coarse dust particles and then enters the bag dust collector. The dust collected by the bag is the bag dust collector. Ash is a high-temperature mixture containing iron and carbon produced during the blast furnace smelting process of iron ore powder, coke, lime and other ironmaking materials. [0003] Blast furnace bag dust removal ash has small particle size and light specific gravity, so it is easy to float in the atmosphere and seriously pollute the surrounding environment; it contains many low-boiling metals with small particle sizes, and whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/02C22B19/30
CPCC22B7/001C22B7/02C22B19/30Y02P10/20
Inventor 杜海东
Owner 杜海东
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