Ceramic brick prepared from garbage fly ash and preparation method thereof

Abstract

The invention belongs to the technical fields of solid waste environmental protection disposal and building material production, and discloses a method for preparing ceramic bricks from garbage fly ash, which includes: mixing incineration garbage fly ash with a stabilizer and aging to obtain stabilized fly ash; , mixing 25% to 45% of the stabilized fly ash, 22% to 55% of the ridge material, and 15% to 48% of the correction material to make a composite powder; dry pressing the composite powder , and natural drying to obtain a green body to be fired; sintering the green body to be fired at a high temperature, and then cooling to obtain a ceramic brick; wherein, the stabilizer is calcined hydrotalcite. The method provided by the invention realizes the harmlessness and recycling of fly ash disposal and utilization in the fly ash disposal process; reduces the dependence on natural resources from the perspective of material design, and realizes the synergy between fly ash and other solid wastes Disposal and utilization, realize the simultaneous progress of harmless and resourceful bulk solid waste.

Description

technical field [0001] The invention relates to the technical fields of solid waste environmental protection disposal and building material production, in particular to a ceramic brick prepared from garbage fly ash and a preparation method thereof. Background technique [0002] The main component of waste incineration fly ash is SiO 2 、Al 2 o 3 , CaO, MgO, Fe 2 o 3 , CuO, K 2 O, Na 2 O, etc., is a useful material that can be utilized as a resource. Through the batching and supporting technology, the resource utilization of waste can be realized, and huge fly ash treatment costs can be saved. For the harmless disposal and resource utilization of fly ash, the current direction of resource utilization of fly ash is mainly the utilization of building materials. By adding a large amount of chemical reagents, clay, industrial waste residue, natural sand, etc., adding water to mix, molding, drying, and sintering at about 1000 ° C to prepare bricks for building materials, th...

AI Technical Summary

Problems solved by technology

However, there is a pursuit of a large amount of fly ash, and the adverse effects of a large amount of calcium oxide in fly ash on the product are not considered; at the same time, it is highly dependent on natural resources, and the compatibility of raw materials is out of touch with the actual production process, especially for sintered products. Compatibility with plastic correction materials may cause cracking or low strength of the product; there is secondary treatment of waste water in wet press molding, especially some inventions do not consider the safety hazards of fly ash to the environment and production personnel, and do not affect the safety of fly ash For pretreatment, although some inventions have done harmless pretreatment on fly ash, the disposal process is complicated, the cost of chemicals is high, and the pretreatment produces secondary wastewater, waste, waste, etc., and the fly ash has not been considered in the entire process design. Safe and efficient control of the whole process of harmlessness and resource utilization