Rapid stabilizing method for thermal state massive steel slag

Abstract

A rapid stabilization processing method for thermal state massive steel slag pertains to the field of thermal state massive steel slag processing technique. Thermal state solid steel slag enters in a rapid stabilization processing apparatus, CO2 gas and water vapor are accessed at the same time when the rapid stabilization processing apparatus rotates, CO2 has a chemical reaction with f-CaO and f-MgO in the steel slag, and then covers the material granule surface of f-CaO and f-MgO that do not react in the steel slag; through massive the interaction between massive steel slag or the interaction between steel slag and grinding media, the steel slag is granulated and simultaneously the hard shell of newly generated CaCO3 and MgCO3 are damaged, to expose the f-CaO and f-MgO that do not react in the steel slag; through continuous reaction between CO2, water vapor and f-CaO, f-MgO, the f-CaO and f-MgO in the steel slag can have total overall reaction, and ultimately realize rapid stabilization of steel slag.

Description

technical field [0001] The invention belongs to the technical field of hot massive steel slag treatment, and in particular provides a rapid stabilization treatment method for hot massive steel slag, which is suitable for free calcium oxide in solid steel slag at various temperatures produced in the steelmaking process of the iron and steel metallurgical industry (Magnesia) rapid stabilization treatment, and can realize the granulation of steel slag and the separation and recovery of metals in steel slag at the same time. Background technique [0002] Calcium oxide reacts with water to generate calcium hydroxide with a volume expansion of 96%, and magnesium oxide reacts with water to generate magnesium hydroxide with a volume expansion of 148%. Due to the high free calcium oxide (f-CaO) in the steel slag, when the steel slag is used for concrete preparation, the f-CaO in the steel slag will continue to undergo hydration reaction after the concrete hardens, causing the concret...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method for rapid stabilization of hot massive steel slag, which solves the problems existing in the existing steel slag processing technology in terms of rapid stabilization of steel slag, granulation of steel slag, and separation of slag and steel, and can realize rapid stabilization of steel slag. Stabilization treatment, and on this basis to realize steel slag granulation and slag steel separation

Images