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Process method for extracting zinc ash from flue gas by metallurgical solid waste pyrogenic melting

A process method and flue gas technology, applied in the field of iron and steel metallurgy, can solve the problems of poor metallurgical solid waste dust treatment effect, unsatisfactory zinc recovery effect, and complicated operation process, so as to speed up melting efficiency, promote melting reduction reaction, and improve product quality. Yield effect

Inactive Publication Date: 2020-10-30
王俊英 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the above method, the effect of zinc recovery is not ideal, the operation process is complicated, and it is not easy to realize
[0004] Therefore, it is an urgent problem for those skilled in the art to provide a process for extracting zinc ash by melting flue gas of metallurgical solid waste fire method to solve the phenomenon of poor metallurgical solid waste dust treatment effect and low resource utilization rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1 of the present invention discloses a process for extracting zinc ash by melting flue gas of the metallurgical solid waste fire method, which specifically includes the following steps:

[0038] (1) take blast furnace dedusting ash, coke and industrial starch respectively according to the mass ratio of 90:30:3, for subsequent use;

[0039] (2) First crush blast furnace dust and coke together, and then pass through an 80-mesh sieve after crushing; then add the binder into water and stir evenly according to the solid-to-liquid ratio of 2:1, and then add the crushed metallurgical solid waste and coke , mixed uniformly to obtain a mixed slurry;

[0040] (3) Press the mixed slurry into a cube structure with a side length of 15mm, and then dry it until the water content is less than 2wt%, so as to obtain the sintered material;

[0041] (4) Add the sintered material to the reactor, and then melt and reduce it at 900° C. for 30 minutes to obtain flue gas containing ...

Embodiment 2

[0044] Embodiment 2 of the present invention discloses a process method for extracting zinc ash by melting flue gas of the metallurgical solid waste fire method, which specifically includes the following steps:

[0045] (1) According to the mass ratio of 100:80:7, take the sintering dust, coke and bentonite respectively, and set aside;

[0046] (2) first crush metallurgical solid waste and coke together, and pass through an 80-mesh sieve after crushing; then add the binder into water and stir evenly according to the solid-to-liquid ratio of 5:2, then add the crushed metallurgical solid waste and coke, mixed evenly to obtain mixed slurry;

[0047] (3) Press the mixed slurry into a cube structure with a side length of 25mm, and then dry it until the water content is less than 1wt%, so as to obtain the sintered material;

[0048](4) Add the sintered material to the reactor, and then melt and reduce it at 1100° C. for 40 minutes to obtain flue gas containing zinc powder;

[0049...

Embodiment 3

[0051] Embodiment 3 of the present invention discloses a process for extracting zinc ash by melting flue gas of metallurgical solid waste fire method, which specifically includes the following steps:

[0052] (1) Take the mixture of converter dust and converter mud, coke and industrial starch and molasses respectively according to the mass ratio of 95:60:5, and set aside;

[0053] (2) first crush metallurgical solid waste and coke together, and pass through an 80-mesh sieve after crushing; then add the binder into water and stir evenly according to the solid-to-liquid ratio of 4:1, then add the crushed metallurgical solid waste and coke, mixed evenly to obtain mixed slurry;

[0054] (3) Press the mixed slurry into a cube structure with a side length of 20 mm, and then dry it until the water content is less than 1.5 wt%, to obtain the sintered material;

[0055] (4) Add the sintered material to the reactor, and then melt and reduce it at 1000° C. for 35 minutes to obtain flue ...

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Abstract

The invention discloses a process method for extracting zinc ash from flue gas by metallurgical solid waste pyrogenic melting. The process method comprises the following steps of reducing oxide and sulfide of zinc in metallurgical solid waste by a pyrogenic fusing method; and then further separating and recovering the flue gas to obtain the zinc ash.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, and mainly relates to a process method for extracting silver-rich potassium ash from flue gas melted by fire method. Background technique [0002] Traditional iron and steel enterprises will produce a large amount of metallurgical solid waste dust in the process of ironmaking, steelmaking and steel rolling, accounting for more than 10% of the total steel output, which contains a large amount of iron, so it has a high recovery value; but at the same time, zinc The content is relatively high. Zinc is a trace element in blast furnace raw materials. It usually enters the blast furnace in the form of oxide or sulfide. However, due to its low reduction temperature and low boiling point of liquid zinc, it can hardly be absorbed by slag iron. However, if zinc-containing dust is returned to the sintering process for use, the contained zinc will enter the blast furnace along with the sint...

Claims

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Application Information

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IPC IPC(8): C22B7/02C22B1/16C22B1/243C22B1/244C22B5/02C22B19/20C22B19/30
CPCC22B1/16C22B1/243C22B1/244C22B5/02C22B7/02C22B19/20C22B19/30Y02P10/20
Inventor 不公告发明人
Owner 王俊英
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