Method for analyzing content of nonferrous metals in waste incineration slag according to different particle size gradations
A technology for waste incineration slag and non-ferrous metals, which is applied in analytical materials, preparation of test samples, instruments, etc., can solve problems such as the inability to realize rational utilization of resources, and achieve the effect of rational optimization of equipment energy.
Pending Publication Date: 2021-04-30
ZHEJIANG UNIV OF TECH
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[0004] In order to overcome the problem that existing garbage incineration slag treatment plants cannot realize the reasonable utilization of resources in the selection of equipment specifications for the recovery of non-ferrous metals in slag, the present invention provides a method for analyzing the metal mass ratio in garbage incineration slag, so as to realize the analysis of slag Rational optimization of equipment energy used in subsequent processing
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[0025] The present invention will be further described below in conjunction with the accompanying drawings.
[0026] refer to figure 1 A method for analyzing non-ferrous metal content in waste incineration slag according to different particle size distributions, comprising the following steps:
[0027] 1) Screening: using a standard sieve, the slag particle size is divided into >40mm, 20-40mm, 10-20mm, 5-10mm, 2-5mm, 0-2mm through multi-stage screening;
[0028] 2) Water washing: remove the small particles attached to the large particles by water washing, this operation is carried out on the corresponding standard sieve, and the amount of water used is 4-6 times the quality of the slag;
[0029] 3) Drying: place the slag in an electric oven with a temperature above 105°C for more than 12 hours to remove the moisture contained in the slag for subsequent analysis;
[0030] 4) Crushing: reduce the particle size of inorganic components by crushing, but do not change the particle...
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Abstract
A method for analyzing the content of nonferrous metals in waste incineration slag according to different particle size gradations comprises the following steps: collecting slag samples from a waste incineration plant according to a standard sampling method, and screening the slag samples into different particle sizes through a standard sieve to determine the gradation distribution of the slag; and determining the content of magnetic metal by adopting a method of washing, drying, magnetic separation and grinding with water, and then determining the content of various non-ferrous metals by adopting a method of separating-smelting-hole drilling-XRF by crushing and secondary sieving density. The invention provides a method for analyzing content of nonferrous metals in waste incineration slag to achieve reasonable optimization of equipment energy used for follow-up treatment of the slag.
Description
technical field [0001] The invention relates to the field of domestic waste incineration slag treatment, in particular to the field of analysis of nonferrous metal content in domestic waste slag. Background technique [0002] In recent years, incineration has gradually become the mainstream technology of domestic waste disposal in my country. It can effectively reduce the volume and quality of domestic waste by about 90% and 70% respectively, and generate electricity and heat, which can significantly reduce the pressure of municipal waste disposal. However, waste incineration is not a terminal treatment, and slag and fly ash residues will still be produced. Among them, domestic waste slag accounts for 80% of the total residual mass, and the output is very large. Studies have shown that slag is a very complex mixture, containing a large proportion of coal ash, and mixed with more scrap iron, light non-ferrous metal aluminum and heavy non-ferrous metal copper, zinc and nickel....
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IPC IPC(8): G01N7/18G01N1/28
CPCG01N7/18G01N1/28
Inventor 胡艳军朱永豪赵玲芹胡贵祥
Owner ZHEJIANG UNIV OF TECH