Rapid stabilizing method for thermal state massive steel slag

A technology of stabilization treatment and steel slag, which is applied in the direction of recycling technology, etc., to achieve the effect of shortening the time

Inactive Publication Date: 2009-07-08
SHOUGANG CORPORATION
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  • Abstract
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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 stabiliza...

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  • Rapid stabilizing method for thermal state massive steel slag

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Embodiment Construction

[0020] The invention relates to a rapid stabilization treatment method for hot massive steel slag, which realizes the combination of steps figure 1 Described as follows:

[0021] The steel slag discharged from the slag tank, the hot solid steel slag after preliminary cooling and granulation, enters the rotating solid steel slag rapid stabilization treatment device 4 through the slag inlet 3, and the CO 2 Gas and water vapor pass through CO 2 The air inlet 1 and the water vapor inlet 2 enter the steel slag rapid stabilization treatment device 4, and the stabilization treatment device driven by the driving device 7 is in the process of rotation, through the interaction between the steel slag itself or the steel slag and the grinding medium, to realize the steel slag At the same time of granulation, the CaCO generated during the stabilization process and wrapped on the surface of unreacted f-CaO and f-MgO particles 3 and MgCO 3 The hard shell is destroyed, and the unreacted f-...

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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...

Claims

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Application Information

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IPC IPC(8): C21B3/06
CPCY02W30/50
Inventor 廖洪强冯向鹏唐卫军时朝昆王金花余广炜
Owner SHOUGANG CORPORATION
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