Preparation method of fly ash energy-saving brick

Abstract

The preparation method of the fly ash energy-saving brick comprises the following steps: (1) using a high-humidity material dryer to dry biological sludge and river bottom sludge; (2) taking the dried biological sludge and The river bottom mud is mixed with fine sand, fly ash and shale, and the mixing time is 10-20 minutes to make a dry mixture; (3) The dry mixture is conveyed to the pressure molding machine by an empty feeder for extrusion molding, Cut into bricks, put them into a wheel kiln, and after drying, fire them at high temperature to make finished products. The invention can effectively utilize solid waste such as sludge and fly ash, and can produce energy-saving sintered bricks with excellent performance, and the obtained products have light weight, sound insulation, heat insulation, heat preservation, and radioactive indicators are lower than national standards, and are suitable for building energy-saving bricks. The characteristics of large-scale buildings; it has the advantages of short production cycle, low production cost, simple process, energy saving, soil saving, SO2 and other waste gas emissions, and clean production.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment for environmental protection, and in particular relates to a preparation method of fly ash energy-saving bricks. Background technique [0002] At present, the main methods of sludge treatment in my country are incineration and landfill. Dioxin and other harmful gases are easily produced during the incineration process, causing secondary pollution. Landfill not only permanently occupies a large amount of land, but also the sludge after centralized landfill is very likely to produce secondary three-dimensional pollution, especially serious pollution to groundwater, downstream land, and river channels; at the same time, harmful metals are within a radius of 50km from the landfill. It will form a metal enrichment circle and seriously pollute the environment. Therefore, it is an urgent and important task for my country's paper industry and the current environmental protection field to c...

AI Technical Summary

Problems solved by technology

However, the traditional solid clay sintered bricks with clay as the main raw material have the disadvantages of small size, heavy weight, high production energy consumption and occupying a large amount of cultivated land.