Ceramsites containing municipal sewage treatment sludge and ceramic polishing slag and preparation methods of ceramsites

Abstract

The invention discloses ceramsites containing municipal sewage treatment sludge and ceramic polishing slag and preparation methods of the ceramsites. A foamed ceramsite containing municipal sewage treatment sludge and ceramic polishing slag is composed of the following raw materials: municipal sewage treatment sludge, ceramic polishing slag, an admixture and a foaming agent. A sintered ceramsite containing municipal sewage treatment sludge and ceramic polishing slag is composed of the following raw materials: municipal sewage treatment sludge, ceramic polishing slag and an admixture. Meanwhile, the invention further discloses the preparation methods of the ceramsites containing municipal sewage treatment sludge and ceramic polishing slag. The municipal sewage treatment sludge and ceramic industrial solid waste ceramic polishing slag powder are comprehensively utilized, a novel solid waste recycling technology is provided, and the technology provides an effective approach for avoiding secondary pollution of the municipal sewage treatment sludge with relatively high treatment difficulty. The preparation methods have the advantages such as high waste slag utilization ratio, wide raw material source, clean and environment-friendly process, simple step, shortened production period and energy saving.

Description

technical field [0001] The invention relates to urban sewage treatment sludge ceramic polishing slag ceramsite and a preparation method thereof. Background technique [0002] Ceramsite is a kind of artificial inorganic light aggregate, which is mainly used in thermal insulation, heat insulation, lightweight walls, lightweight aggregate concrete, lightweight concrete for structures, architectural decoration, etc. in construction engineering, and can also be used for environmental protection filtration, agricultural fields such as planting. At present, the main sources of raw materials for the preparation of ceramsite include clay, shale, mine stripping, loess, industrial solid waste, river surge, domestic sludge, etc., which are prepared by adding auxiliary additives such as expansion materials and ingredients. Since the excavation of natural resources such as clay and shale will cause soil erosion, environmental pollution, and ecological damage, clay ceramsite is an obsolet...

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Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art, one of the purposes of the present invention is to provide a method for preparing ceramsite with urban sewage treatment sludge and ceramic polishing slag as main ingredients, to overcome the need to add more sludge ceramsite Natural resources—clay is the problem of preparing sludge ceramsite as a batching; the second purpose of the present invention is to utilize the internal foaming mechanism of ceramic polishing slag in the high-temperature calcination process to produce the characteristics of tiny closed bubbles, so that it is different from municipal sludge Compatibility, while providing a technology for synergistic treatment of sludge, it also produces a high-performance ceramsite to overcome the current problems of sludge ceramsite such as high density, low cylinder compressive strength and high water absorption; the purpose of the present invention The third is to provide a kind of sludge porcelain slag ceramsite for preparing building components, especially suitable for preparing reinforced ceramsite concrete products (1200~1800kg / m 3 ) and other high-performance (C15 ~ C40) ceramsite concrete with higher strength ceramsite

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