Method for measuring metal aluminum content in garbage incineration slag

A technology of waste incineration slag and metal aluminum, which is applied in the field of solid waste resource utilization, can solve the problems of undiscovered metal aluminum content, influence on measurement accuracy, mutual interference, etc., achieve high reproducibility, and convenient and fast operation process , Determining the effect of low cost

Inactive Publication Date: 2013-11-13
YANTAI UNIV
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Problems solved by technology

This is because waste incineration slag contains a variety of metal ions, such as Al 3+ , Fe 2+ , Ca 2+ and Zn 2+ etc. When these methods are used, they will interfere with each other and affect the measurement accuracy
The Chinese authorized patent document "A method and device for detecting the content of metal aluminum in incineration ash" (CN103091200A, application number: CN201210591714.5) proposes a method and device for detecting the content of metal aluminum in incineration ash, which is essentially a drainage method , but the operation is complicated, and the lye used is NaOH solution, and the Ca(OH) in the cement system 2 Alkaline environments are inconsistent
[0007] Therefore, there is no method suitable for measuring the metal aluminum content in waste incineration slag at present.

Method used

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  • Method for measuring metal aluminum content in garbage incineration slag

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1 The method for measuring the metal aluminum content in the garbage incineration slag, fully dispersing the garbage incineration slag in saturated Ca(OH) 2 In the lye, the volume of hydrogen gas released is measured by the drainage method, and then the content of metal aluminum in the waste incineration slag is calculated. The Ca(OH) 2 For analytical purity. The waste incineration slag is added to Ca(OH) 2 Before being placed in the lye, it is ground to an average particle size of less than 80 microns.

[0026] The volume of hydrogen gas is measured by the drainage method, see figure 1 shown. according to figure 1 Connect the device well, immerse the end of the outlet tube in water, then hold the flask with both hands, and observe whether there are any bubbles overflowing, if there are, it means that the airtightness is good, if not, you need to check carefully to ensure the airtightness of the device.

[0027] Before testing the amount of hydrogen gas...

Embodiment 2

[0029] Example 2 The method for measuring the aluminum content in waste incineration slag, the basic steps are the same as in Example 1, but the lye in the flask is heated to 70°C in a water bath, and the waste incineration slag obtained by wet discharge is used, and the waste incineration slag is baked at 105°C Dry processing.

Embodiment 3

[0030] Example 3 The method for determining the metal aluminum content in waste incineration slag, the basic steps are the same as in Example 1, but the lye in the flask is heated to 60° C. in a water bath. In this embodiment, the waste incineration slag has a large odor and residual wood, ceramic chips, iron materials and unburned plastics, etc., so it needs to be pretreated by deodorization, iron removal, screening, etc. before grinding , the pretreatment is the removal of wood, ceramic flakes and unburned plastics.

[0031] Principle of the present invention: garbage incineration slag contains a certain amount of metal aluminum components, metal aluminum and Ca(OH) 2 The solution reaction equation is as follows: Ca(OH) 2 +2Al+2H 2 O=Ca(AlO 2 ) 2 +3H 2 ↑. Under standard conditions, one mole of any ideal gas occupies a volume of about 22.4 liters. Therefore, as long as the volume of hydrogen gas produced can be accurately detected, the content of metallic aluminum can ...

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Abstract

The invention discloses a method for measuring metal aluminum content in garbage incineration slag. The method comprises the following steps of fully dispersing garbage incineration slag in a saturated Ca(OH)2 alkali liquor, measuring the volume of discharged hydrogen through a drainage method, and calculating the metal aluminum content in the garbage incineration slag. The method has the excellent effects that the measurement result is accurate, and the repetition rate is high; the measurement cost is low, and only an analytically pure Ca(OH)2 reagent is required to be purchased in conventional measurement; in addition to the obtained metal aluminum content, the gas-forming property of metal aluminum in the saturated Ca(OH)2 solution can be measured, and thus beneficial reference can be provided for production of aerated concrete by taking the garbage incineration slag as a gas-forming agent.

Description

technical field [0001] The invention belongs to the field of resource utilization of solid waste, and in particular relates to a method for measuring the content of metal aluminum in waste incineration slag. Background technique [0002] Due to the complex composition of municipal solid waste, landfill is the main way to deal with it at present. However, with the further development of social urbanization, the amount of garbage discharge is increasing, and the whole city will be almost surrounded by garbage. Since there are a lot of substances with calorific value in domestic waste, heat will be released after burning, which can be used to generate electricity, and the volume will be greatly reduced. But this has brought about the disposal of waste incineration ash. Waste incineration ash is mainly divided into fly ash and slag. The former contains a certain amount of dioxins. potential. [0003] According to the literature search in "CNKI", there are several research pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N7/18G01N1/28
Inventor 宋远明李宝玲丁天王志娟
Owner YANTAI UNIV
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