摘要: 采用高温烧与控制硅酸二钙晶相转变活化煤研石及制备煤研石超细粉体。用X 射线衍射法对煤研石及活化煤研石的矿物组成进行了测定，煤研石的主要矿物为莫来石(3Al2O₃·2SiO₂)与石英(SiO₂)，活化煤研石的主要矿物为硅酸二钙 (C₂S) 和七铝十二钙(Cl₂A₇);研究了影响硅酸二钙晶相转变的主要因素:钙硅比、烧温度、烧时间、样品冷却方式等，找出了有利于硅酸二钙晶相转变的最佳参数，有效消除阻止 C₂S 晶相转变的干扰因素,煤研石高温烧结料自粉化率达到 100%,自粉化料平均粒径小于 1.0 um。

关键词: 煤研石;超细粉体;晶相转变;

Abstract: Calcining at high temperature and controlling the crystal change of 2CaO · SiO₂ are adoped to activated coal gangue and to prepare ultrafinepowderofcoal gangue. Mineral compositions ofcoal gangue and activated coalgangue are measured. The main compositions of coal gangue are mullite(3Al2O₃·2SiO₂) and quartz (SiO₂), and those of the activated coal gangueare 2CaO · SiO₂ and 12CaO·7Al₂O₃ · The main factors such as the ratio ofcalcium and silicate, the calcination temperature, time and the cooling modeof sample which influencing the crystal change of 2CaO · SiO₂ are investi-gated. The best process parameters that propitious to the crystal change of 2CaO · SiO₂ are founded out. Disturbing factors ofcrystal change of 2CaO · SiO₂ are eliminated effectively and the complete self-pulverization of coagangue sinter is realized. The average diameter of particles is less than 1. 0um.

Keywords: fly-ash; ultrafine powder; crystal change