Method for producing energy-saving bricks by comprehensive utilization of paper making sludge and fly ash

Abstract

The invention relates to a method for producing energy-saving baked bricks by comprehensively using papermaking sludge and pulverized fuel ash or furnace bottom slag. The method for producing energy-saving baked bricks is characterized in that 5 to 30 parts of biological sludge, 5 to 30 parts of deinked sludge, 1 to 5 parts of white mud from alkali recovery, 5 to 25 parts of pulverized fuel ash or furnace bottom slag, and 50 to 70 parts of shale are mixed by weight; the mixture is extruded and molded before the mixture is cut into adobe; the adobe is put in a ring kiln; after the adobe is dried, the dried adobe is burnt for four to eight hours at the temperature of 900 to 1050 DEG C, thus getting the finished product. The method for producing energy-saving baked bricks has the advantages that all of the solid wastes produced by papermaking plants such as papermaking sludge, pulverized fuel ash or furnace bottom slag are effectively used for producing energy-saving baked bricks having excellent performance; the bricks have the characteristics of light weight, sound insulation, heat insulation, thermal insulation and radioactivity indices lower than national standard, and applicability for building energy-saving buildings. In addition, the method for producing energy-saving backed bricks have the advantages of short production cycle, low manufacturing cost, simple process, energy conservation, soil conservation, and small exhaust emission of SO2, and clean production.

Description

Technical field [0001] The invention relates to a method for comprehensively utilizing solid wastes such as paper mill biological sludge, deinking sludge, alkali recovery white mud, fly ash or bottom slag to produce energy-saving fired bricks. Background technique [0002] The paper industry is an important part of the national economy. In 2001, the output of paper and paper products in my country reached 29.5 million tons, becoming the third largest producer of paper and paper products in the world after the United States and Japan, and the second largest paper manufacturer. big consumer. At the same time, the paper industry is also a relatively serious pollution industry. In 2006, the annual output of hardened sludge in my country's paper industry exceeded 20 million tons. There are three kinds of sludge produced in the papermaking process: biological sludge, deinking sludge and alkali recovery white sludge. Biological sludge is a sedimentary substance produced during the...

AI Technical Summary

Problems solved by technology

Therefore, this method cannot completely dispose and utilize all the sludge produced by papermaking enterprises

In addition, this method has a single raw material, and cannot comprehensively utilize fly ash and other industrial waste residues. It is not suitable for promotion in places where the output of papermaking sludge is small, and it cannot meet the raw material requirements of large-scale brick-making enterprises.