Method for making ceramsite from sludge

Abstract

The invention discloses a method for fabricating ceramsite by using sludge. The method is characterized by comprising the following steps: by selecting raw materials, mixing the raw materials, wherein the raw materials comprise sludge, project spoil and coal ash; processing the evenly mixed raw materials into ceramsite by using at least two parallel ceramsite calcined production lines, wherein the moisture content of the sludge in the raw materials is 80% while the moisture content of the project spoil is 8.5-9.5%, the sludge, the project spoil and the coal ash are mixed according to the ratio of the 10:1:3, or the moisture content of the sludge in the raw materials is less than 60% while the moisture content of the project spoil is 8.5-9.5%, and the sludge, the project spoil and the coal ash are mixed according to the ratio of the 2:1:3. Therefore, recycling of the sludge can be achieved by the method for fabricating the ceramsite, a farmland is protected, and resources are saved.

Description

technical field [0001] The invention relates to a method for making ceramsite, in particular to a method for making ceramsite from sludge. Background technique [0002] Urban domestic sewage and industrial wastewater must be treated by sewage treatment plants, and can only be discharged after reaching the national sewage discharge standard. This is an indispensable environmental engineering measure for urban ecological environment construction. Sludge is an accessory after sewage treatment. It is an extremely complex heterogeneous body composed of organic matter, nitrogen, phosphorus, heavy metals, pathogens and ash. It is a type of extremely harmful waste. , if it is not treated and controlled thoroughly, it will cause serious secondary pollution to the environment. [0003] The amount of sludge usually accounts for 0.3%-0.5% (volume) of the amount of sewage. If advanced sewage treatment is adopted, the amount of sludge will increase by 0.5-1 times. At present, domestic s...

AI Technical Summary

Problems solved by technology

[0006] However, the existing method of making ceramsite from sludge requires a large amount of clay, which will cause certain damage to the environment, and its equipment is prone to failure so that the entire production line is forced to stop production, and the existing method of making ceramsite from sludge If the moisture content of the sludge is not well controlled, the quality of the produced ceramsite is poor, and the moisture of the mixture is not well controlled when it enters the firing process, resulting in high energy consumption and low utilization rate of urban solid waste

Images