Preparation method of light-weighted autoclaved unburned block

Abstract

The invention relates to a preparation method of a light-weighted autoclaved unburned block, which relates to the integrated utilization of a solid waste. Aerated concrete block waste is crushed into aggregate; dry FGD is mixed with the aggregate, added with water during the stirring and formed, to prepare an adobe; and the adobe is sent into steam to be cured, to prepare the light-weighted autoclaved unburned block. The preparation method of the light-weighted autoclaved unburned block has small finished product density, high strength and lighter weight, realizes the 'zero emission' of the dry FGD in a dry desulfurization process, solves the problem of enterprise product waste piling of the aerated concrete block, and reduces piling sites; the compressive strength and the flexural strength of the unburned block exceed the standard of a national autoclaved lime sand brick superior product; the weight of the produced autoclaved unburned block is 20 percent less than that of the traditional clay brick and autoclaved sand-lime brick on the basis of reaching all strength standards of the traditional red brick; no secondary pollution is produced, and the integrated utilization of resources is realized; and the process is simple, and the investment and treatment cost is low. The preparation method of the light-weighted autoclaved unburned block is universal.

Description

technical field [0001] The invention relates to a comprehensive utilization of solid waste, in particular to a method for preparing light autoclaved non-burning blocks by using dry desulfurization ash and aerated concrete block waste as main raw materials. Background technique [0002] Systems such as boilers in coal-fired power plants and heating power plants, and sintering machines in steel plants produce a large amount of sulfur dioxide pollutants during the combustion process. In recent years, due to the water-saving and energy-saving advantages of the dry desulfurization process, the desulfurization process has become more and more popular among users. The desulfurization ash produced by the dry desulfurization process is a high-calcium ash, in which calcium sulfate hemihydrate, calcium sulfite hemihydrate, calcium carbonate, and calcium hydroxide are the main components. If the dry desulfurization ash is not comprehensively utilized, a large amount of land will be occ...

AI Technical Summary

Problems solved by technology

[0007] Since blast furnace slag, slag, sea sand or tailings can be applied to the cement industry, the relative price is relatively expensive, and these materials have a high density, so that the produced autoclaved non-fired blocks have a higher unit density and smaller closed pores. The overall earthquake resistance and thermal insulation performance of the building have not been effectively improved.