Method for comprehensively treating and utilizing household garbage incineration slag

Abstract

The invention discloses a method for comprehensively treating and utilizing household garbage incineration slag.. The method comprises the following steps: A. screening and primary crushing of slag; B. primary magnetic separation; C. secondary crushing: the slag subjected to the primary magnetic separation is conveyed into a flushing water continuous injection type sanding machine through a conveying belt, the slag is crushed in the sanding machine, and the crushed slag granules flow out of the sanding machine together with the flushing water; D. secondary magnetic separation: the mixture of the slag and the flushing water flowing out of the outlet of the sanding machine flows by a drum magnetic iron remover, and magnetic metals contained in the slag are picked out by secondary magnetic separation; E. buoyancy gravity concentration on other metals; and F. precipitation of non-metallic tailings. Since other metals are picked up by secondary magnetic separation and buoyancy gravity concentration, the metal content in the slag is effectively decreased, the quality of bricks or cement is guaranteed when the treated slag is used to make bricks or cement; and since the flushing water is continuously injected into the sanding machine, most of disgusting odor can be removed and dust is eliminated, and the water circulation manner is adopted, the advantages of saving energy and protecting the environment are achieved.

Description

technical field [0001] The invention relates to a method for processing and utilizing slag, in particular to a method for comprehensively processing and utilizing domestic waste incineration slag. Background technique [0002] The so-called domestic waste incineration slag refers to the waste residue generated under the incinerator row during the domestic waste incineration process. Slag is the residue after domestic waste incineration, which is composed of inhomogeneous mixture of slag, glass, ceramics, metal, combustibles and so on. The main elements of slag are Si, Al and Ca. The main components are amorphous glass matrix, quartz, calcite and so on. The toxicity and harmful components of the slag were analyzed by the Shanghai Environmental Monitoring Center, and the results were all lower than the national standard; the radioactive inspection of the slag was carried out by the Shanghai Building Materials Institution Component Quality Supervision and Inspection Station, ...

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Problems solved by technology

The above-mentioned patents have the following defects: 1. Due to the use of steel ball mills to pulverize the slag, a large amount of dust will be produced, thereby causing certain pollution to the environment. In addition, the odor in the slag will spread outward, causing certain air pollution to the surrounding environment. Pollution; 2. The metal content in the slag is not up to the standard, so when the treated slag is applied to bricks or cement, the quality of bricks or cement is affected, thus causing hidden dangers in construction projects

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