Sorting and separation process for comprehensive utilization of slag

Abstract

The invention discloses a sorting and separation process for utilizing slag comprehensively. The process comprises the following steps of: crushing pretreated original slag in a wet method, performing magnetic separation to select crushed iron granules, and performing gravity separation on slag charge, so that light products, heavy products and intermediate fine materials are separated out by taking water as a separating medium; and purifying metal subjected to the gravity separation by an ore dressing table concentrator, and sorting the metal. In the process, four kinds of products are sorted by combining crushing equipment and gravity separation equipment under the hydraulic action, and also cay be recycled, wherein like natural gravels, the sorted intermediate fine material sand is a high-quality material for producing high-quality building materials; and in the key point of the process, metal substances in the slag are sorted and separated, so the problems of secondary pollution (including the radiation pollution of heavy metal) during application and the like are solved.

Description

technical field [0001] The invention discloses a sorting and separation process for comprehensive utilization of slag, which belongs to the technical field of comprehensive utilization of slag, and is especially applied to the separation process of domestic waste incineration slag (including solid residues of other recyclable metal impurities). Background technique [0002] Domestic waste incineration slag, because the composition of domestic waste is complex, with too many impurities and metal substances, the traditional treatment method is generally dry treatment, mainly using a crusher for crushing, and then magnetic separation to remove iron impurities. After screening, it is used to produce building materials product. However, this separation can only remove a small amount of iron materials, while other metals such as copper, zinc, lead, aluminum and alloys cannot be removed. Moreover, the slag of domestic waste has high carbon content and mud content, which cannot be ...

AI Technical Summary

Problems solved by technology

However, this separation can only remove a small amount of iron materials, while other metals such as copper, zinc, lead, aluminum and alloys cannot be removed. Moreover, the slag of domestic waste has high carbon content and mud content, which cannot be removed by dry separation. In addition, there is a lot of dust in the production process, the production process is not environmentally friendly, and the content of other impurities such as metals is too high, which will affect the subsequent comprehensive utilization of slag, reduce the utilization efficiency, and increase the secondary pollution of comprehensive utilization products (including possible heavy metal radiation pollution). risk

Images