微波加热法制备尾矿微晶玻璃的研究

Preparation of Tailing Glass-ceramics by Microwave Heating Treatment

以包头铁尾矿、金矿尾矿为主要原料,以白云鄂博矿尾矿中含有的Fe_2O_3和CaF_2为形核剂,采用玻璃熔制-微波热处理方法制备出以辉石相为主晶相的尾矿微晶玻璃。材料的热处理制度为3 h升温至720℃,保温20 min。所制备成的微晶玻璃其显微形貌呈现枝状晶形态,具有交错互锁结构。并且材料具有较好的理化性能：密度为2.97 g/cm^3,抗折强度为264.62 MPa,耐酸性99.38%,耐碱性99.17%,弹性模量、剪切模量分别为109.83 GPa和45.39 GPa。该材料制成微晶玻璃管材/板材制品,可广泛应用于化工、电力、建材等行业。

The diopside glass-ceramic materials were prepared by conventional glass melting technique and hybrid microwave heating using Baotou iron tailing and gold ore tailing as the main raw materials, the Fe203 and CaF2 from Bayan Obo tailings were nucleating agents. The materials were heated up to 720℃ in 3 h, holding 20 rain. The prepared glass-ceramics exhibit a tightly interlocking crystal structure, and the materials possess good physical and chemical properties： the density is 2.97 g/cm3, bending strength is 264.62 MPa, acid/alkali-resistances are 99.38% and 99.17%, Elastic modulus and shear modulus were 109.83 GPa and 45.39 GPa respectively. The tube/sheet products made of glass-ceramics can be widely used in chemical industry, electric power, building materials and other industries.