Full-solid waste weak concrete material prepared with solid sulphur slag of fluidized bed fire coal

Abstract

The invention discloses a concrete material which totally adopts industry solids waste to replace cement preparation, comprising a gelled material and a skeletal material. The gelled material is composed of the components with the following weight portions of 36 to 75 portions of fluidized bed burning coal solid sulfur clinker, 9 to 25 portions of acetylene sludge and 6 to 15 portions of phosphogypsum; because the cementing materials such as cement, lime, asphalt, and the like, are not needed at all, material costs are remarkably reduced, great amount of industry solids waste is used to produce building materials, especially the fluidized bed burning coal solid sulfur clinker is used to serve as raw material, environment pollution is avoided, and land resources are saved.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to an all-solid-waste low-grade concrete material prepared by utilizing coal-fired sulfur-fixing ash in a fluidized bed. Background technique [0002] Fluidized bed coal-fired sulfur fixation technology is a more economical and practical desulfurization technology developed after raw coal desulfurization and flue gas desulfurization. It improves the combustion state of coal and adds a certain amount of desulfurizer during coal combustion. Absorb SO released during coal combustion 2 , to generate sulfite or sulfate, etc., which are fixed in the ash and slag, and are discharged together with the slag. Due to the many advantages of fluidized bed boilers, the development of fluidized bed boilers has been regarded as an important direction to solve the problem of air pollution by burning low-quality coal and desulfurization and denitrification at home and abroad. However,...

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Problems solved by technology

However, none of these studies involved the utilization of sulfur-fixed ash in a fluidized bed; at the same time, these studies generally required the addition of costly binders (such as lime, cement, asphalt, etc.) or activators to improve the strength of the mixture, and most of them The utilization rate of waste residue is low, below 80%. There is no research on the gelation system composed entirely of solid waste, and the solid waste cannot be fully utilized to achieve social, economic and environmental benefits.