Household garbage incineration residue treatment method

Abstract

The invention provides a household garbage incineration residue treatment method. The household garbage incineration residue treatment method comprises the following steps: (1) sorting large-sized materials; (2) carrying out magnetic separation, namely extracting magnetic metal by virtue of the magnetic separation; (3) carrying out multilevel screening on particles with particle sizes greater than 5mm so as to reserve the particles with the particle sizes smaller than 5mm; (4) carrying out eddy current separation, namely respectively extracting multiple groups of nonmagnetic metal in the particles with the particle sizes greater than 5mm by virtue of the eddy current separation; and (5) carrying out wet-method treatment, namely feeding an appropriate amount of circulating water into the particles with particle sizes smaller than 5mm, separating the particles by virtue of a jigging machine and a table concentrator, and extracting the nonmagnetic metal in the range of the particle size. By adopting the household garbage incineration residue treatment method, under the condition that the water consumption and the production amount of sewage and sludge can be reduced by more than 50 percent, the residue aggregates in different particle size ranges can be produced, the nonmagnetic metal with the particle size smaller than 5mm can be maximally extracted, the investment is less than the investment of a pure-dry-method treatment process, and the economic benefit is ideal.

Description

technical field [0001] The invention relates to the technical field of domestic waste treatment, in particular to a semi-dry treatment process for domestic waste incineration slag. Background technique [0002] Using domestic waste incineration power generation technology, municipal solid waste will produce slag after being incinerated at a high temperature of 1000 °C. The volume of the slag is about 20% to 30% of the original domestic waste. The color of domestic waste incineration slag is dark brown; the particle size is different, the composition is complex, and the main components are Ca, Si, Na, K, Fe, Al and some heavy metals. Although the slag has been sintered, it is mixed with a large number of early impurities during the factory process, such as glass, iron sheets, bottle caps, and iron and copper metals, such as iron nails, iron wires, iron sheets, and copper nuts. [0003] Domestic and foreign domestic waste incineration slag treatment methods mainly include dr...

AI Technical Summary

Problems solved by technology

However, dry processing equipment is usually difficult to extract non-ferrous metals below 5mm, which is also the technical bottleneck of the industry

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