摘要
采用河南西峡的橄榄石原矿,分别配以0、6%、12%、15%、18%、24%(质量分数)的轻烧镁粉和31.85%的菱镁石粉(MgO质量分数为47.1%),以亚硫酸纸浆废液为结合剂制成50 mm×50 mm的圆柱试样,在1 000、1 200、1 300和1 550℃保温3 h煅烧后,采用XRD和SEM分析试样的相组成和显微结构。结果表明:与菱镁石粉比较,轻烧镁粉与橄榄石的反应活性较高;加入6%的轻烧镁粉基本可使橄榄石矿中的顽火辉石和磁铁矿分别转化为镁橄榄石和镁铁尖晶石(煅烧温度1 300℃以上);加入轻烧镁粉或菱镁石粉的试样经1 300℃煅烧后的矿物相趋于稳定。
The forsterite refractories specimens were prepared using olivine crude ore from Xixia of Henan province as main starting material, light burned magnesia powder （0, 6%, 12%, 15%, 18% and 24% in mass ratio） and 31.85% （mass ratio） magnesite powder （contained 47.1 wt% MgO） as supplement, sulphite lye as binder, shaping into cylinder of Φ50 mm ×50 mm, calcining at 1 000, 1 200, 1 300 and 1 550 ℃ for 3 h, respectively. The phase composition and microstructure were studied by XRD and SEM. The results showed that, compared with magnesite powder, light burned magnesia powder had higher reaction activity with olivine ; when adding 6% light burned magnesia, the enstatite and magnetite in olivine ore could convert into forsterite and ceylonite, respectively （the calcining temperature was above 1 300 ℃） ; the phase compositions of specimens with light burned magnesia or magnesite became stable after being calcined at 1 300 ℃.
出处
《耐火材料》
CAS
北大核心
2008年第5期354-356,361,共4页
Refractories
关键词
橄榄石矿
镁橄榄石
煅烧温度
MGO含量
相组成
Olivine ore, Forsterite, Calcining temperature, Magnesia content, Phase composition
