Forsterite does not contain free SiO2 and is recognized as an environmental protection and health material in the world. The departments of product production, application, waste discharge and regeneration can fundamentally eliminate occupational diseases of silicosis. Hubei Jinmei Mining Co., Ltd. has independently developed a series of magnesia peridotite refractories and biochemical ceramic materials with high temperature resistance, corrosion resistance and good chemical stability through its unremitting efforts.
Forsterite [(mg) 2sio4] (abbreviated as M2S) is used as the main component, and the refractory is forsterite refractory. The content of M2S in the material is more than 95%, and its m / S ratio is ≥ 1.2.
In addition to the main crystalline phase M2S, there are a considerable amount of periclase, magnesium ferrite and other minerals in magnesia peridotite refractories. The crystalline particles of M2S are large and form a structural skeleton. Other minerals do not exist as conjugates, but in the form of inclusions in the cracks of forsterite crystals. Therefore, the properties of forsterite refractories mainly depend on the properties of forsterite with molecular structure.
Pure forsterite has a melting point of 1890 ℃, which is the only stable refractory phase in mgo-sio2 system. There is no homogeneous heterogeneous transformation of M2S from room temperature to melting point.
Forsterite has a high load softening temperature. The initial deformation temperature of pure forsterite crystal materials and products can reach 1650 ~ 1770 ℃, or even higher. Its thermal shock resistance and water absorption self powder resistance are better than ordinary magnesia brick.
Introduction to forsterite refractories
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