A kind of polyaluminum chloride waste slag dry-mixed mortar and preparation method thereof

Abstract

The invention discloses a polyaluminum chloride waste slag dry-mixed mortar and a preparation method thereof. The dry-mixed mortar comprises the following raw materials in parts by mass: 4-8 parts of heat-activated polyaluminum chloride waste slag, 23-25 ​​parts of cement, 55-60 parts of sand, 4-6 parts of fly ash, 0.05-0.15 parts of defoamer, 0.20-0.22 parts of water reducing agent, and polymer emulsion of 5%-9% of the total mass of the above raw materials. The present invention uses industrial waste polyaluminum chloride waste slag and fly ash to replace high-energy-consuming cement to prepare cement mortar, which can effectively reduce the large-scale stacking of polyaluminum chloride waste slag and reduce the use of high-energy-consuming cement, and has good social and economic benefits. The preparation method of the polyaluminum chloride waste slag dry-mixed mortar is simple and low in cost, is beneficial to industrial production and popularization, can significantly improve the resource utilization of the polyaluminum chloride waste slag, and is of great significance in reducing construction costs, reducing environmental pollution, and the like.

Description

technical field [0001] The invention relates to a dry-mixed mortar of polyaluminum chloride waste residue and a preparation method thereof, belonging to the technical field of resource utilization of industrial waste. Background technique [0002] Polyaluminum chloride waste residue is a by-product of industrial production of polyaluminum chloride. Polyaluminum Chloride (PAC) is a high-efficiency flocculant in water treatment. There are many methods for producing polyaluminum chloride (PAC) at home and abroad. Commonly used The method is a two-step method of dissolving bauxite and calcium aluminate powder in acid, that is, bauxite and calcium aluminate powder react with hydrochloric acid or mixed acid under certain conditions to obtain liquid polyaluminum chloride (PAC), and the residual solid forms slag. About 0.5-1.0 tons of waste residue is produced for every 1 ton of polyaluminum chloride produced. With the gradual improvement of environmental protection requirements, t...

AI Technical Summary

Problems solved by technology

These storage methods not only occupy a large amount of land and cause environmental pollution, but also make the available components in the waste slag unable to be rationally utilized, resulting in waste of resources, which seriously limits the further development of the current water purifier industry. It is the main trend of the utilization of polyaluminum chloride waste slag, and it can consume polyaluminum chloride waste slag in large quantities.

[0003] Since the PAC waste residue has a certain weak acidity, and the Cl in the PAC waste residue - The content is as high as 8.85%, so PAC waste residue cannot be directly used as a building material

In addition, although SiO in PAC waste 2 and Al 2 o 3 The content of SiO is not low, respectively 34.74% and 22.55%, but in acidic environment SiO 2 and Al 2 o 3 The chemical activity of PAC is not well utilized, so the utilization of PAC waste residue is greatly limited

In the prior art, there are few literatures on using polyaluminum chloride waste slag as raw material for resource utilization. Therefore, developing a cement mortar containing polyaluminum chloride waste slag and its preparation method is a problem to be studied by those skilled in the art

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