Method for producing concrete active admixture by iron tailings

Abstract

The present invention relates to a method to produce concrete active mixing material using the waste iron to replace part of scoria. The method is to add 70 percent to 93 percent of the magnet quartz waste iron, 1 percent to 20 percent of calcareousness or calcium carbide residual or the mixture of the two materials, 1-10 percent of gypsum or semi-water gypsum or anhydrite or decarbolizing gypsum or phosphorus gypsum or fluorspar gypsum or the mixture of the two or more than the two and 0.1 - 5 percent of corroding together to be milled into 80um griddle residual less or equal to 3 percent; and the grain is to be made the reaction of heat liquid corroding reaction. The corroding production after being cooled is mixed with 10 -60 percent of scoria with the molar percent between 40 percent and 90 percent and then to be milled into 80um griddle residual less or equal to 0.5 percent; in this way, the active concrete mixture replaced with the scoria powder is obtained. The present invention can make the magnet quartz waste iron treated with resource mode, relax the lacking of the super thin scoria powder led by the much larger infusion for the casting of the concrete and decrease the manufacturing cost for the concrete; the method can enhance the use amount of the mixture, decrease the use amount of the cement and decrease the resource consumption and environment pollution led by the cement production.

Description

Technical field: [0001] The invention belongs to the field of building materials, in particular to a method for producing active concrete admixtures from iron tailings. Background technique: [0002] Magnetite-quartzite iron ore is the most important type of iron ore in my country. This iron ore is mainly composed of two minerals, magnetite and quartz, and the content of the two minerals can reach more than 90%. With the improvement of beneficiation technology and the increasing demand for iron ore in the iron and steel industry, the grade of this type of ore continues to decline. Generally, 3 to 6 tons of iron ore are needed to select 1 ton of iron ore concentrate. That is, 5 to 10 tons of iron ore are needed to smelt 1 ton of pig iron. Therefore, the production of steel will produce a large amount of tailings. At present, the whole of China has accumulated tens of billions of tons of iron tailings, occupying a large amount of land, mountains and rivers, damaging the env...

AI Technical Summary

Problems solved by technology

Invention patent CN1429784A "A Portland Cement Clinker" discloses a technology of mixing 5-18% iron tailings as ingredients for firing cement clinker. Significant technological advances in fuel savings

This patent has the characteristics of reducing calcined cement clinker and saving fuel, but the masonry cement involved in this technology cannot be used to prepare high-strength grade concrete