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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AI-Extracted Technical Summary

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 provid...

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.

Application Domain

Process efficiency improvement

Technology Topic

SulfideFlue gas +2

Examples

Experimental program(4)
Effect test(1)

Example Embodiment

[0036] Example 1

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

[0038] (1) Weigh blast furnace dust removal ash, coke and industrial starch according to the mass ratio of 90:30:3 for use;

[0039] (2) The blast furnace dust and coke are firstly pulverized and passed through an 80-mesh sieve; then the binder is added to the water according to the solid-to-liquid ratio of 2:1 and mixed evenly, and then the pulverized metallurgical solid waste and coke are added , Mix evenly to obtain mixed slurry;

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

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

[0042] (5) Pass the flue gas containing zinc powder through the spiral zinc ash collection pipe on the top of the reactor, and then enter the electromagnetic zinc ash separation device for separation.

Example Embodiment

[0043] Example 2

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

[0045] (1) Weigh sintered dust removal ash, coke and bentonite according to the mass ratio of 100:80:7, and set aside;

[0046] (2) First, the metallurgical solid waste and coke are pulverized together and passed through an 80-mesh sieve; then the binder is added to the water according to the solid-to-liquid ratio of 5:2 and stirred evenly, and then the pulverized metallurgical solid waste and Coke, mix evenly to obtain mixed slurry;

[0047] (3) The mixed slurry is pressed into a cube structure with a side length of 25mm, and then dried to a water content of less than 1wt%, to obtain a sintered material;

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

[0049] (5) Pass the flue gas containing zinc powder through the spiral zinc ash collection pipe on the top of the reactor, and then enter the electromagnetic zinc ash separation device for separation.

Example Embodiment

[0050] Example 3

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

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

[0053] (2) First, the metallurgical solid waste and coke are pulverized together, and then passed through an 80-mesh sieve; then the binder is added to the water according to the solid-to-liquid ratio of 4:1 and stirred evenly, and then the pulverized metallurgical solid waste and Coke, mix evenly to obtain mixed slurry;

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

[0055] (4) Add the sintering material to the reactor, and then melt and reduce it at 1000°C for 35 minutes to obtain a flue gas containing zinc powder;

[0056] (5) Pass the flue gas containing zinc powder through the spiral zinc ash collection pipe on the top of the reactor, and then enter the electromagnetic zinc ash separation device for separation.

PUM

Property	Measurement	Unit
Water content	2.0
Water content	<= 1.5

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

increase contact area

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

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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