Method for preparing ceramsite by utilizing stale garbage

Abstract

The invention provides a comprehensive treatment method for stale garbage. The comprehensive treatment method comprises the steps that 1, garbage screening is conducted through a loading machine; 2, oversize products and undersize products are obtained through primary screening, the oversize products are subjected to manual sorting and magnetic separation, and then ferromagnetic materials and light combustible materials are recycled; the undersize products are subjected to crushing and secondary screening to obtain oversize products and undersize humus soil which are subjected to secondary screening again, the humus soil is taken as a main raw material, light combustible obtained by screening is taken as fuel, and the building material, namely ceramsite, is produced. The production processof the building material ceramsite comprises the following steps: crushing the oversize combustible; mixing the crushed oversize combustible, the crushed undersize humus and auxiliary materials; mixing and pelletizing; drying the pelletized object, sintering at 1200 DEG C, quenching the flue gas in the sintered product, and treating the flue gas in the drying and sintering processes to ensure that the flue gas is discharged after reaching the standard.

Description

technical field [0001] The invention relates to the technical field of garbage treatment, in particular to a method for preparing ceramsite by using stale garbage. Background technique [0002] In March 2011, the executive meeting of the State Council proposed "speeding up the treatment of stock waste", which provided policy guidance and support for the mining and utilization of landfill mineralized waste, and the treatment of old waste was also mentioned on the agenda of government departments. This is even more urgent for some cities with a large amount of garbage production, and garbage disposal has entered a new era of simultaneous management of new and old garbage. [0003] At present, the domestic mining and disposal process is basically the same as the foreign mining process, which can be roughly divided into excavation of garbage dumps, primary screening, and secondary screening. After the primary sieve passes through the magnetic separator to recover ferrous metals...

AI Technical Summary

Problems solved by technology

However, due to its status as garbage, plastics have been mixed in garbage dumps for a long time, and hygienic conditions also limit the application range of recycled plastics, so they are greatly restricted as a heat source. The light combustibles obtained from garbage sorting are mainly plastics. Due to the variety of plastics, there are thermosetting, thermoplastic, chlorine-containing or chlorine-free, and they are mixed together. Although they can be reused as raw materials, due to the difficulty of classification, recycled plastics cannot produce high-end products.

At the same time, the conventional combustion method, after combustion, there are harmful substances in the flue gas, which will cause secondary pollution to the environment. Therefore, even though the use of waste plastics as a heat source is a promising technical direction, the hazards that may be caused by the flue gas after combustion , which greatly limits the use of waste plastics as fuel, especially without a stable heat demand, the heat obtained from combustion aimed at eliminating the hazards of plastics can only be emptied in vain, which is not only a waste of resources, but also creates heat for the environment. Pollution

[0006] 2) The amount of humus produced after the treatment of mineralized waste is extremely large. Although humus has many uses, they all have limitations and cannot guarantee the balance of supply and demand throughout the year

However, this invention utilizes the calorific value of garbage organic matter, so light combustibles in garbage have not been processed, and the treatment of garbage is incomplete. At the same time, the amount of sludge in garbage treatment plants is limited, which also limits this process. Promotion

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