Accelerator and preparation technology thereof

Abstract

The invention relates to an accelerator and a preparation technology thereof. The technology comprises the following steps: preparing a raw material from 35wt% of bauxite, 24wt% of soda ash, 30wt% of limestone and 11% of coal, milling the raw material to form powder, adding the powder to a 1250DEG C high temperature furnace segment, burning the powder to form aluminum oxygen chamotte, milling the aluminum oxygen chamotte to form powder with the fineness being smaller than 15%, and uniformly stirring 40-60wt% of the aluminum oxygen chamotte powder and 40-60wt% of fly ash to prepare the accelerator. The fly ash is generated after calcining gangue in a fluidized bed boiler, the vulcanic ash active component content of the fly ash is large, and the Al2O3 content reaches 27.39% (the alum stone content is about 20%), so the condensation time is further shortened, and the later strength of concrete is guaranteed under the action of activity of vulcanic ash. The accelerator and the preparation technology thereof have the following advantages: the fly ash from a power plant is used, and is changed into valuables from wastes, so pollution of the fly ash to environment is reduced; and high temperature calcined alum stone is omitted, so electric energy is saved, the production cost is reduced, and the later strength of the concrete is guaranteed.

Description

technical field [0001] The invention relates to a concrete quick-setting agent, in particular to a novel high-strength quick-setting agent used in the construction of mines, tunnels, subways and the like. Background technique [0002] The known quick-setting agent for concrete is made by adding alumina clinker to high-temperature calcined alum stone, alum mud, gypsum and other mixed materials, which leads to low strength of concrete in the later stage and high rebound rate, which cannot be suitable for construction. Process requirements, can not guarantee the quality of the project. Simultaneously because need high temperature to calcinate alunite, increase power consumption, cause the production cost of product higher. Contents of the invention [0003] The object of the present invention is to provide a quick-setting agent produced by using the fly ash of the power plant, which greatly reduces the production cost and ensures the improvement of the project quality. [0...

AI Technical Summary

Problems solved by technology

[0002] The known quick-setting agent for concrete is made by adding alumina clinker to high-temperature calcined alum stone, alum mud, gypsum and other mixed materials, which leads to low strength of concrete in the later stage and high rebound rate, which cannot be suitable for construction. Process requirements, can not guarantee the quality of the project

At the same time, due to the need to calcinate alunite at high temperature, the power consumption is increased, resulting in a higher production cost of the product