Preparation method of aluminum sludge ceramsite

Abstract

The invention relates to a preparation method of aluminum sludge ceramsite. The preparation method comprises: drying and grinding aluminum sludge with auxiliary materials such as glass powder, egg shell and fly ash; mixing and stirring the materials uniformly; then adding water as a binder; carrying out mixing granulation to obtain green ceramsite; and then drying, preheating, sintering and cooling the green ceramsite. According to the preparation method provided by the invention, the aluminum sludge and glass powder are adopted to replace clay to provide Al2O3 and SiO2, so that the manufacturing cost of ceramsite is remarkably reduced. The manufactured ceramsite has the advantages of large specific surface area, rough surface, high porosity, few dissolved substances, high water absorptionperformance, low dissolution rate and the like, can be used for large-scale disposal of aluminum sludge in water supply plants, realizes waste utilization, and saves the disposal cost of aluminum sludge. The aluminum sludge ceramsite is widely used in secondary treatment and advanced treatment of sewage, treatment of building reclaimed water, treatment of industrial wastewater, and treatment sponge city rainwater, and has a high market application prospect.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a method for preparing aluminum sludge ceramsite. Background technique [0002] With the continuous increase of my country's population and the acceleration of the urbanization process, the number of cities and towns is increasing day by day, and the demand for the construction of urban water supply systems and tap water is increasing day by day. As a result, the amount of water supply sludge is also increasing. At present, the main disposal methods include: sludge landfill and sludge utilization. Landfill treatment of sludge as garbage is an effective way of disposal, but it will cause secondary pollution to the environment, causing many hazards, and it is difficult to fundamentally solve the problem of sludge disposal. How to properly dispose of water supply sludge based on its own characteristics, and realize the harmlessness, reduction and resource utilization of wa...

AI Technical Summary

Problems solved by technology

However, farmland soil takes a long time to form and is a non-renewable resource. Using a large amount of clay to make ceramsite is not a raw material route in line with my country's national conditions.

As the country restricts the use of clay bricks and their products, the application of clay as a raw material for ceramsite should also be restricted

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