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Method of purifying urban household waste incinerator residues step by step

A technology for municipal solid waste and waste incineration slag, which is applied in the direction of combustion methods, chemical instruments and methods, incinerators, etc., can solve the problems of long time consumption, high energy consumption, and lack of comprehensive use, so as to reduce the content of free carbon , The steps are simple and easy, and the effect of improving the leaching efficiency

Inactive Publication Date: 2019-03-08
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing purified SiO 2 Most of the raw materials are natural ores containing silicon sources and various industrial tailings. In order to obtain excellent purification effects, it often takes a long time, consumes high energy, and requires various expensive mechanical equipment, but ignores the huge output of domestic waste incineration slag and reuse value
The application of the existing domestic waste incineration slag is relatively limited and single, and it has not been systematically and comprehensively used through continuous and continuous treatment.

Method used

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  • Method of purifying urban household waste incinerator residues step by step
  • Method of purifying urban household waste incinerator residues step by step
  • Method of purifying urban household waste incinerator residues step by step

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for step-by-step purification of municipal solid waste incinerator slag, such as figure 1 shown, including the following steps:

[0029] a. First, put an appropriate amount of waste incineration slag in an electric blast drying oven for 4 hours at 100°C.

[0030] b. Place the dried slag on a vibrating sieving machine for 10 minutes. The apertures of the sieve are 10, 20, 50, 100, and 200 mesh from top to bottom. burnt-out trash, and use magnets to circle each screen 3 times to recover magnetic metals.

[0031] c. Put the above-mentioned slag in a ball mill for 30 min to obtain a particle size below 200 mesh.

[0032] d. Mix the slag below 200 mesh in step c with distilled water (solid-to-liquid ratio: 1g: 8mL), stir at room temperature for 30 minutes, and stir at a speed of 800 r / min. After standing for clarification, pour it out and float on the water surface Impurities, and then suction filtration under reduced pressure.

[0033] e. Mix the washed slag wi...

Embodiment 2

[0038] A method for step-by-step purification of municipal solid waste incineration slag, comprising the following steps:

[0039] a. First, put an appropriate amount of waste incineration slag in an electric blast drying oven for 4 hours at 100°C.

[0040] b. Place the dried slag on a vibrating sieving machine for 10 minutes. The apertures of the sieve are 10, 20, 50, 100, and 200 mesh from top to bottom. burnt-out trash, and use magnets to circle each screen 3 times to recover magnetic metals.

[0041] c. Put the above-mentioned slag in a ball mill for 30 min to obtain a particle size below 200 mesh.

[0042] d. Mix the slag below 200 mesh in step c with distilled water (solid-to-liquid ratio: 1g: 8mL), stir at room temperature for 30 minutes, and stir at a speed of 800 r / min. After standing for clarification, pour it out and float on the water surface Impurities, and then suction filtration under reduced pressure.

[0043] e. Mix the washed slag with 25% sulfuric acid so...

Embodiment 3

[0047] A method for step-by-step purification of municipal solid waste incineration slag, comprising the following steps:

[0048] a. First, put an appropriate amount of waste incineration slag in an electric blast drying oven for 4 hours at 100°C.

[0049] b. Place the dried slag on a vibrating sieving machine for 10 minutes. The apertures of the sieve are 10, 20, 50, 100, and 200 mesh from top to bottom. burnt-out trash, and use magnets to circle each screen 3 times to recover magnetic metals.

[0050] c. Put the above-mentioned slag in a ball mill for 30 min to obtain a particle size below 200 mesh.

[0051] d. Mix the slag below 200 mesh in step c with distilled water (solid-to-liquid ratio: 1g: 8mL), stir at room temperature for 30 minutes, and stir at a speed of 800 r / min. After standing for clarification, pour it out and float on the water surface Impurities, and then suction filtration under reduced pressure.

[0052] e. Mix the washed slag with 20% nitric acid solu...

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Abstract

The invention discloses a method of purifying urban household waste incinerator residue step by step. The method comprises the steps of drying, screening, magnetic separation, water washing, acid leaching, roasting, water quenching, and secondary acid leaching, wherein the residue from each purification step corresponds to different morphology, physical properties and chemical composition; the residues may be applied to different fields. SiO2 is purified from the household waste incinerator residues through simple processes; the period is short; the energy consumption is low; mass impurities in the residues are effectively removed. The method herein provides another route to acquire massive silicon sources against the situation that massive waste incinerator residues are produced each yearin China; wastes are turned into wealth and are effectively reused.

Description

technical field [0001] The invention belongs to the technical field of garbage recovery and utilization, and in particular relates to a method for stepwise purification of municipal solid waste incineration slag. Background technique [0002] Municipal solid waste incineration slag is the main residue produced by waste incineration, accounting for about 80-90%, and the rest is fly ash and air pollution control residues. Waste incineration slag has excellent physical and chemical properties such as light weight, strong volcanic ash activity, high refractoriness, and large specific surface area. It has gradually changed from domestic waste to an important material. Sandstone has similar components, and it can be used to replace natural sandstone. In terms of engineering materials, it can be used as a partial raw material substitute for the production of cement / concrete, ceramics and glass / ceramic. In terms of geotechnical engineering, it can be used to include Road constructi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/023C01B33/12B02C17/10B03C1/30B07B1/28F23G5/44
CPCB02C17/10B03C1/30B07B1/28C01B33/023C01B33/12F23G5/44
Inventor 许宁王佳磊岳鹿谢宇陈介民浦旭清沈超
Owner YANCHENG INST OF TECH
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