System and method for comprehensive utilization of metallurgical solid waste

A solid waste, metallurgical technology

Active Publication Date: 2022-07-08
唐山鹤兴废料综合利用科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current production process only removes zinc from metallurgical solid waste dust into the flue gas, and does not remove and collect potassium, sodium and other elements, resulting in the presence of potassium, sodium and other alkali metal elements in the metallurgical waste dust. In solid waste dust, the treatment effect is not ideal and the resource utilization rate is low
[0005] Therefore, it is an urgent problem for those skilled in the art to provide a treatment method for metallurgical solid waste to solve the phenomenon of poor metallurgical solid waste dust treatment effect and low resource utilization rate.

Method used

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  • System and method for comprehensive utilization of metallurgical solid waste
  • System and method for comprehensive utilization of metallurgical solid waste
  • System and method for comprehensive utilization of metallurgical solid waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A comprehensive utilization system for metallurgical solid waste, comprising an oxidation gasification unit, a reduction gasification unit, a power generation unit and a replacement separation unit;

[0051] The oxidation gasification unit includes an oxidation gasification kiln, a first cyclone flue gas magnetization device and a first high temperature bag filter, and the flue gas of the oxidation gasification kiln passes through the first cyclone flue gas magnetization device and the first cyclone flue gas magnetization device. a high temperature bag filter, the discharge port of the first high temperature bag filter is communicated with the displacement separation unit, and the discharge port of the oxidation gasification kiln is communicated with the reduction gasification unit through a belt conveyor;

[0052] The reducing gasification unit includes a reducing gasification furnace, a second cyclone flue gas magnetization device and a second high-temperature bag filt...

Embodiment 2

[0063] Embodiment 2 of the present invention discloses a comprehensive utilization method for metallurgical solid waste, which specifically includes the following steps:

[0064] (1) The metallurgical solid waste is sent to the oxidation gasification kiln, the oxygen content of the atmosphere in the oxidation gasification kiln is 16%, the oxidation gasification temperature is controlled at 1350 ° C, and the gasification oxidation enrichment obtains potassium-sodium-silver mixed dust (potassium-sodium-silver mixed dust) Dust K element content 50%) and iron-containing slag;

[0065] (2) The iron-containing slag blocks are broken into 25mm pellets, and part of the coke is sent to the reduction gasification furnace. The mass ratio of the slag-containing iron blocks to the coke is 2.5:1, the reduction and gasification temperature is controlled at 1580 ° C, and the gasification reduction and enrichment are carried out. The zinc-indium mixed dust (the zinc-indium mixed dust has a Zn ...

Embodiment 3

[0070] Embodiment 3 of the present invention discloses a comprehensive utilization method for metallurgical solid waste, which specifically includes the following steps:

[0071] (1) The metallurgical solid waste is sent to the oxidation gasification kiln, the oxygen content of the atmosphere in the oxidation gasification kiln is 17%, the oxidation gasification temperature is controlled at 1550 ° C, and the gasification oxidation enrichment obtains potassium-sodium-silver mixed dust (potassium-sodium-silver mixed dust) Dust K element content 52%) and iron-containing slag;

[0072] (2) The iron-containing slag blocks are broken into 25mm pellets, and part of the coke is sent to the reduction gasifier. The mass ratio of the slag-containing iron blocks to the coke is 2.5:1, the reduction and gasification temperature is controlled at 1550 ° C, and the gasification reduction enrichment Obtained zinc-indium mixed dust (zinc-indium mixed dust with Zn element content of 45%), molten i...

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Abstract

The invention discloses a system and method for comprehensive utilization of metallurgical solid waste, and uses metallurgical solid waste (metallurgical production environment dust removal, sintering dust, pellet dust, blast furnace dust, converter dust sludge, electric furnace dust sludge, steel slag and rolling steel Dust sludge solid waste, etc.) as the main raw material, through oxidative gasification enrichment, reductive gasification enrichment and replacement separation coupling integrated comprehensive utilization, to extract Fe, K, Na, Zn, CaO, SiO in metallurgical solid waste 2 , S, MgO, Al 2 O 3 and other elements. The invention realizes the comprehensive utilization of metallurgical solid waste in the true sense, realizes the step-by-step grading, enrichment, separation, extraction of all elements, and exhaustion and squeezing of the metallurgical solid waste. The overall method is simple, efficient, and easy to carry out industrial production.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a comprehensive utilization method of metallurgical solid waste. Background technique [0002] Traditional iron and steel enterprises will produce a large amount of metallurgical solid waste dust, iron oxide scale and slag in the processes of sintering, pelletizing, iron making, steel making and steel rolling, accounting for more than 10% of the total steel output, which contains a large amount of iron and zinc. , potassium, sodium, lead, silver, indium and other rare and precious metals, with high recycling value. [0003] At present, the most important recycling method of metallurgical solid waste is to return it to sintering as ingredients, but this method has obvious defects. Due to the large difference between the physical parameters of metallurgical solid waste and mineral powder raw materials, the production technical indicators and product quality of sint...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/70B09B3/35B09B3/80B09B3/40B09B101/55
CPCC22B7/02C22B7/001C22B7/006C22B11/023C22B11/044C22B19/30C22B58/00C22B26/10Y02P10/20
Inventor 王俊英班友合王旭民王志刚王锦程何汉兵宋昌顺王丽莉吴慧敏李海涛
Owner 唐山鹤兴废料综合利用科技有限公司
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