Study on preparation of superfine slag powder and modification of FGD gypsum
RONG Tianren
BAO Xinhua
ZHANG Jin
YU Guoxin
Abstract：Superfine slag powder with specific surface area>600 m2/kg was produced by removing the metallic iron efficiently through using the pre-grinding and final-grinding system. Taking the superfine powder as the modifiers,then mixed them with desulfurization gypsum and getting related index by testing. The results show,the superfine slag powder can efficiently improve the properties of desulfurization gypsum. The optimum content of superfine slag powder was 15%,meanwhile compared to that without the superfine slag powder,the water absorption of gypsum reduced by 5.8%,the flexural strength (7 d and 28 d) decrease by 9.6%and 9.0%,respectively. While the compressive strength(7 d and 28 d) increase by 17.2% and 23.9%,respectively.
Keywords：superfine slag powderdesulfurization gypsummodifier
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 49-51 )