Polyaluminum chloride waste residue dry-mixed mortar and preparation method thereof

Abstract

The invention discloses polyaluminum chloride waste residue dry-mixed mortar and a preparation method thereof. The dry-mixed mortar comprises the following raw materials in parts by mass: 4-8 parts ofheat activated polyaluminum chloride waste residues, 23-25 parts of cement, 55-60 parts of sand, 4-6 parts of fly ash, 0.05-0.15 parts of a defoamer, 0.20-0.22 parts of a water reducing agent and a polymer emulsion accounting for 5%-9% of the total mass of the raw materials. The industrial waste polyaluminum chloride waste residues and fly ash are adopted to replace high-energy-consumption cementto prepare the cement mortar, mass stacking of the polyaluminum chloride waste residues can be reduced effectively, the use amount of high-energy-consumption cement can be reduced, and the social andeconomic benefits are good. The preparation method of the polyaluminum chloride waste residue dry-mixed mortar is simple, low in cost and beneficial to industrialized production and promotion, can significantly improve the resource utilization of polyaluminum chloride waste residues, and has important significance in reducing construction costs, reducing environmental pollution and the like.

Description

technical field [0001] The invention relates to a polyaluminum chloride waste slag dry-mixed mortar 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 an efficient flocculant in water treatment. There are many methods for producing polyaluminum chloride (PAC) at home and abroad. The method is a two-step method of acid-dissolving bauxite and calcium aluminate powder, 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 waste residue. Every ton of polyaluminum chloride produces about 0.5-1.0 tons of waste residue. With the gradual improvement of environmental protection requirements, the demand for polyaluminum chloride c...

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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