A method for co-processing and recycling of metallurgical solid waste and municipal waste incineration fly ash

A technology of waste incineration fly ash and incineration fly ash, which is applied in solid waste management, sustainable waste treatment, solid waste removal and other directions, can solve the problems of catalyst recovery and expensive catalyst, and achieve the effect of promoting degradation and improving removal efficiency.

Active Publication Date: 2022-06-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still many problems to be solved in related research, such as expensive catalysts, recovery of catalysts after treatment, etc.

Method used

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  • A method for co-processing and recycling of metallurgical solid waste and municipal waste incineration fly ash
  • A method for co-processing and recycling of metallurgical solid waste and municipal waste incineration fly ash
  • A method for co-processing and recycling of metallurgical solid waste and municipal waste incineration fly ash

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] In this embodiment, the synergistic harmless treatment of electrolytic manganese slag and waste incineration fly ash and its functional material preparation method include the following steps:

[0059] (1) Synergistic removal of ammonia nitrogen in metallurgical solid waste: Mix the electrolytic manganese slag and waste incineration fly ash according to the mass ratio of 70:30 to obtain a mixture; the mixture and water are added into the airtight container according to the solid-liquid mass ratio of 1:10 In the stirred reactor, react at 80°C for 20min, and the stirring rate is 20r / min, and the reaction will generate ammonia gas. During the reaction, 500mL / min N 2 , so that the ammonia gas produced by the reaction is discharged with the airflow and enters the tail gas recovery system to prepare ammonia water.

[0060] (2) Removal of chlorine ions in the solution: After the reaction in step (1), pass the mixed gas of ozone and oxygen (volume ratio 3:2), the gas flow rate ...

Embodiment 2

[0067] This example utilizes electrolytic manganese slag and garbage incineration fly ash synergistically harmless treatment and its functional material preparation method, step (2) through the mixed gas of ozone and oxygen (volume ratio 1:3), other steps and embodiment 1 same.

Embodiment 3

[0069] In this example, the synergistic harmless treatment of electrolytic manganese slag and waste incineration fly ash and the preparation method of functional materials are used. In step (3), the reaction temperature is 200°C and the treatment is continued for 3 hours. The other steps of this example are the same as in Example 1.

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Abstract

The invention discloses a method for synergistic treatment and recycling of metallurgical solid waste and urban waste incineration fly ash, comprising the following steps: (1) synergistically removing ammonia nitrogen in metallurgical solid waste: mixing metallurgical solid waste, waste incineration fly ash and water Put into a closed reaction kettle and stir to remove ammonia nitrogen, and the ammonia produced by the reaction is used to prepare nitrogen fertilizer or ammonia water; (2) remove chlorine ions in the solution: mix gas O 2 +O 3 Pass in the reaction kettle, because the synergistic effect of metal ion in the solution, remove chloride ion fast; (3) the organic pollutant in the catalytic degradation system: utilize the metal oxide that step (2) reacts to generate as catalyst, add oxidation reagent, Catalytic degradation of organic pollutants; (4) solid-liquid separation, filter residue and filtrate reuse. The invention forms the harmless treatment of solid waste and the recycling of fully closed-loop resources.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and resource utilization, and in particular relates to a method for collaborative processing and resource recycling of metallurgical solid waste and a difficult-to-treat hazardous waste. Background technique [0002] At present, the annual production of solid waste in my country's metallurgical industry is about 430 million tons, and the comprehensive utilization rate is 18.03%. Among them, the production of industrial tailings is 284 million tons, with a utilization rate of 1.5%; the production of blast furnace slag is 75.57 million tons, with a utilization rate of 65%; the production of steel slag is 38.19 million tons, with a utilization rate of 10%; 65%; 17.65 million tons of dust sludge, with a utilization rate of 98.5%; 4.94 million tons of self-provided power plant fly ash and slag, with a utilization rate of 59%; 0.9 million tons of ferroalloy slag, with a utilization rate of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/38B09B3/70B09B5/00C01C1/02C01G49/10C04B18/14C05C3/00
CPCB09B5/00C04B18/14C01C1/022C05C3/00C01G49/10Y02W30/91
Inventor 刘晓明杨通元薛阳王梦凡鲁洋郝先胜
Owner UNIV OF SCI & TECH BEIJING
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