Nickel-iron slag building material and preparation method thereof

Abstract

The invention provides a nickel-iron slag building material and a preparation method thereof, and belongs to the technical field of metal smelting solid waste utilization. The nickel-iron slag building material comprises the following components by weight: 40-60 parts of cement clinker, 1-25 parts of nickel-iron slag micro powder, 2-8 parts of gypsum, 2-8 parts of phosphate, and 0.1-10 parts of an additive, wherein the nickel-iron slag micro powder is prepared by using industrial nickel-iron slag as a raw material and conducting a grinding process to obtain a micro powder with the specific surface area of 350-550 m<2> / kg. By optimizing and adjusting the grinding particle size, the blending ratio and the composition structural characteristics of the nickel-iron slag micro powder, the setting strength of the cement clinker is improved.

Description

technical field [0001] The invention relates to the technical field of metal smelting solid waste utilization, in particular to a ferronickel slag building material and a preparation method thereof. Background technique [0002] As a natural resource, river sand is an important raw material for concrete and mortar. In recent years, my country's investment in infrastructure construction has increased, resulting in an increasing demand for sand and gravel in the market, while the exploitation of natural resources has caused irreparable or irreparable damage to the environment. [0003] Ferronickel slag is industrial waste slag produced by water quenching and quenching after reduction and extraction of nickel and some iron. With the rapid development of my country's stainless steel and special alloy industries, a large amount of ferronickel slag has been obtained by smelting nickel alloy materials from loess nickel ore. In recent years, my country's nickel The annual discharge ...

AI Technical Summary

Problems solved by technology

[0005] The previous basic research found that adding ferronickel sand to concrete can increase the strength of concrete, which can greatly improve the use efficiency of concrete, and will not adversely affect the stability. However, due to the low pozzolanic activity of ferronickel slag, it will As a cement admixture, its early strength is low, its strength growth is slow, and its setting time is long, which limits its further application in cementitious materials.