Sludge porous material and preparation method thereof

Abstract

The invention provides a sludge porous material and a preparation method thereof. The porous materials is prepared from the following raw materials in percentage by weight: 30-50% of sludge, 30-50% of gangue, 10-30% of shale, 2-8% of natural zeolite, 0.2-1.5% of dolomite, 0.2-1.5% of sodium carbonate and 0.2-0.8% of ferric oxide; the preparation method of the sludge porous material comprises the steps of raw material processing, granulating and drying, and ceramsite firing; the porous materials which is porous, high in specific surface area and lightweight can be prepared by taking an organic matter in municipal sludge as a gas generating bulking component of the porous material and the sludge of printing and dyeing as well as papermaking which has the characteristic of abundant fiber component as a pore filling agent, and therefore, the sludge is utilized efficiently, the problem of recycling the sludge is solved, and the product can be applied to a plurality of fields such as building materials, chemical engineering, land reclamation and packings; in short, the development of economic construction is promoted while the sludge is utilized.

Description

technical field [0001] The invention relates to the field of sludge treatment and reuse, in particular to a sludge porous material and a preparation method thereof. Background technique [0002] With the acceleration of my country's urbanization process, the amount of urban sewage treatment has gradually increased year by year, resulting in a sharp increase in the amount of mud produced by urban sewage treatment plants. Sewage sludge has become one of the important wastes generated by cities. In my country, sludge treatment accounts for 25-65% of the investment and operating costs of the entire sewage plant. Sludge treatment has become a heavy burden. At present, my country's sludge treatment methods mainly use landfill, incineration, reclamation and other methods. Landfill disposal requires a large amount of land and pollutes groundwater. Incineration disposal equipment requires high investment and high operating costs, and the combustion of organic matter will produce t...

AI Technical Summary

Problems solved by technology

However, the above inventions do not provide any inspiration for the utilization of sludge, and if ordinary coal ash is mixed with sludge, the properties of the sludge will not change substantially, and only little or no sludge can be used to make porous materials.