Method for treating waste automobile tail gas catalyst through pyrogenic attack

A technology for the treatment of automobile exhaust and pyrolysis, which is applied in chemical instruments and methods, separation methods, sustainable waste treatment, etc., to achieve the effects of excellent production environment, large processing capacity and short process flow

Active Publication Date: 2020-08-25
广西鸿盈达环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above documents disclose the relevant treatment methods of waste automobile exhaust catalysts, but none of the above patents can improve the recovery rate of precious metal extraction while taking into account the problems of production environment, resource recovery and utilization, etc.

Method used

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  • Method for treating waste automobile tail gas catalyst through pyrogenic attack
  • Method for treating waste automobile tail gas catalyst through pyrogenic attack

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A method for pyroprocessing waste automobile exhaust catalysts, such as figure 1 Shown is the process flow diagram of the present embodiment, and described processing method comprises the steps:

[0043] (1) Coarse grinding: Coarsely and finely grind the spent catalyst to expose rare and precious metals and facilitate rapid reaction. Firstly, the used waste automobile exhaust catalyst is coarsely ground with a coarse grinder, and the coarse grinder is a sand mill, and the waste automobile exhaust catalyst is mixed with water and slurried for 0.5 hours, and the liquid-solid mass ratio is controlled at 1:2.5. The temperature of the process is normal temperature 20-25° C., the medium of the rough mill is iron, the solid particle size after rough grinding is 80 mesh to 100 mesh, and the waste automobile tail gas catalyst slurry is obtained.

[0044] (2) Ultrafine grinding: pump the coarsely ground waste automobile exhaust catalyst slurry into the feeding barrel with a mort...

Embodiment 2

[0068] A method for pyroprocessing waste automobile exhaust catalysts, comprising the steps of:

[0069] (1) Coarse grinding: use a coarse grinder or a sand mill for coarse grinding of the used waste automobile exhaust catalyst, and mix the waste automobile exhaust catalyst with water to make slurry, and control the liquid-solid mass ratio at 1:2. The temperature of the method is controlled at 15-20° C., the medium of the rough mill is iron, and the solid particle size after rough grinding is 80 mesh to 100 mesh, so as to obtain the waste automobile exhaust catalyst slurry.

[0070] (2) Ultra-fine grinding: carry out the ultra-fine grinding of the waste automobile exhaust catalyst slurry after coarse grinding, pump it into the ultra-fine grinding machine with a diaphragm pump, utilize the ultra-fine grinding machine to carry out the fine grinding of material circulation, the fine grinding The temperature of the milling process is controlled at 20-30°C, the medium of the fine m...

Embodiment 3

[0079] A method for pyroprocessing waste automobile exhaust catalysts, comprising the steps of:

[0080] (1) Coarse grinding: Use a coarse grinder or a sand mill for coarse grinding of the used waste automobile exhaust catalyst, and mix the waste automobile exhaust catalyst with water to make slurry, and control the liquid-solid mass ratio at 1:3. The temperature of the method is controlled at 30-40° C., the medium of the rough mill is iron, and the solid particle size after rough grinding is 80 mesh to 100 mesh, so as to obtain the waste automobile exhaust catalyst slurry.

[0081] (2) Ultra-fine grinding: carry out the ultra-fine grinding of the waste automobile exhaust catalyst slurry after coarse grinding, pump it into the ultra-fine grinding machine with a diaphragm pump, utilize the ultra-fine grinding machine to carry out the fine grinding of material circulation, the fine grinding The temperature of the grinding process is controlled at 30-40°C, the medium of the fine ...

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Abstract

The invention provides a method for treating a waste automobile tail gas catalyst through pyrogenic attack, and belongs to the technical field of waste resource processing. The method comprises the following steps: carrying out rough grinding and ultra-fine grinding on the waste automobile tail gas catalyst, mixing the catalyst with copper-containing hazardous waste to prepare granules, then adding the granules to an oxygen-rich side blowing furnace for smelting, trapping rare and precious metals under the high temperature by adopting the copper-containing hazardous waste, and then extractingthe rare and precious metals from copper anode mud through a wet method. Low-sulfur flue gas produced in the smelting process is subjected to organic amine adsorption desulfurization after dust collection, and pure sulfur dioxide gas produced by desorption is used for producing sulfuric acid; and smelting furnace slag is used for producing the microcrystalline glass and other building materials after being subjected to magnetic separation. The treatment method not only can efficiently recycle rare and precious metals, is short in technological process and large in treatment amount, reduces energy consumption, and improves the recycling rate of the rare and precious metals; and meanwhile, waste gas and waste residues are effectively treated and recycled, and production environment is good.

Description

technical field [0001] The invention belongs to the technical field of waste resource treatment, and in particular relates to a method for treating waste automobile tail gas catalysts by pyrolysis. Background technique [0002] Automobile exhaust catalysts are catalysts used in automobile exhaust catalytic converters, which function by catalyzing the conversion of CO and NOx in automobile exhaust into CO 2 , N 2 and H 2 O. Generally, the main body of automobile exhaust catalyst contains precious metals such as Pt, Rh, Pd, that is, platinum group metals, and the material used as a catalyst carrier is usually an oxide of a base metal (such as Al 2 o 3 , SiO 2 , ZrO 2 Wait). Although the content of platinum group metals in the catalyst is low, the platinum group metals are expensive and have high recovery value. [0003] The treatment methods of waste automobile exhaust catalysts include fire method, wet method and landfill according to different recovery processes. Py...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B1/248C22B5/10C22B15/00C22B11/02C22B11/00C03C10/06C04B7/147C04B18/14B01D53/14B01D50/00
CPCB01D50/00B01D53/14C03C10/0063C04B7/147C04B18/14C22B1/248C22B5/10C22B7/001C22B7/006C22B7/009C22B11/026C22B11/048C22B15/0052Y02W30/91Y02P40/10
Inventor 张顺应黄明刘世良
Owner 广西鸿盈达环境科技有限公司
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