Cement concrete admixture prepared from acidic zirconium-containing silica slag and preparation method thereof

Abstract

The invention provides a cement concrete admixture prepared from silica slag containing acidic zirconium and a preparation method thereof and belongs to the field of building materials. The cement concrete admixture can be applied to cement products or cement concrete. The cement concrete admixture provided by the invention comprises the following components in percentage by weight: 80-90% of silica slag containing acidic zirconium, 5-10% of coal ash, 4-9% of an activator and 1-2% of a grinding aid. According to the invention, the activity of the acidic zirconium-containing silica slag is increased by roasting the zirconium-containing silica slag and adding the activator so that the performance of the admixture is increased. The replacement amount of cement of the admixture is between 10-30%, and the admixture can be used as the replacer of high-quality mineral admixtures such as slag and silica fume, so that the cost of building materials is reduced; and meanwhile, the silica slag containing acidic zirconium is effectively utilized and the problem of environmental pollution caused by the stack of the slag is solved.

Description

technical field [0001] The invention relates to a cement concrete admixture prepared by using acidic zirconium silica slag and a preparation method thereof, which belongs to the field of building materials and can be used for cement products or cement concrete products. Background technique [0002] Zirconium oxychloride (ZrOCl 2 ·8H 2 O) is an important basic industrial raw material of zirconium salt, which is widely used in industries such as ceramics, textiles, electronics, catalysts and metallurgy. At present, the domestic production of zirconium oxychloride mostly adopts the alkali fusion process, which has the characteristics of stable product quality, large-scale equipment, and low production cost. But its disadvantage is that a large amount of waste alkaline water and zirconium silicon slag are produced, and about 6 tons of waste alkaline water and 0.5-1.0t of acidic zirconium silicon slag are produced for every 1 ton of zirconium oxychloride produced. Among them,...

AI Technical Summary

Problems solved by technology

This treatment process has the characteristics of short process, simple equipment, low investment cost, and obvious economic benefits. The disadvantage is that the silicic acid slag has not been fully utilized

(3) Prepare industrial raw materials such as sodium metasilicate, sodium silicate, polyaluminum chloride with alkaline waste water and acidic silicon slag as basic raw material, the feature of this method is to realize utilizing waste alkaline water and acidic silicon slag simultaneously, but The preparation process is still dominated by wet synthesis, which requires the addition of a small amount of quartz sand, additional foaming alkali, concentration, spray drying, calcination crystallization or crystallization, separation, drying and other process engineering, which inevitably brings waste water secondary pollution

[0004] The above methods are all used in small amounts in actual application, which is not enough to digest a large amount of acidic high-silicon slag that is currently accumulated and continuously produced.