Use of bypass cement dust for production of glass ceramic materials

Abstract

Bypass cement dust from the Rabigh plant in Saudi Arabia was examined for use in the preparation of technical coloured glass and glass ceramic materials. The bypass cement dust made up about 57 wt-% of the batch constituents, depending on composition. The bypass composition was sometimes modified by additions of other ingredients such as silica sand, granite and magnesite. Batches were melted and then cast into glass, which was subjected to heat treatment to induce crystallisation. Techniques including differential thermal analysis, polarising light microscopy, X-ray diffraction and indentation microhardness testing were then applied. The obtained coloured glass and glass ceramic materials possess very high hardness, indicating high abrasion resistance, and making them suitable for many applications under aggressive mechanical conditions.

Use of Bypass Cement Dust from Al-Kufa Cement Factory for Production of Glass Ceramic Material

“…As a result, bulk density is lower than, or equal to (in the absence of porosity), true density. This is complying with study in [12], which explains the reason for increasing the density of sample A5 due to the presence of cement dust and granite at a high percentage. In addition, the sintering of the compress reduced the size of the spaces between particles.…”

“…These phases are wollansite (38.3%), quartz (29.6%), titanite (24.0%), calcium hexaaluminate (3.6%) cristobalite (3.4%) are formed except diopside and periclase . However, Diopside is one of the main crystalline phases in glass ceramics [12] beside Periclase in spite of its low percentage, so that sample A5 represents glass ceramic material in large extent as a compared to the sample C5. In addition to that C5 sample contains a high percentage of SiO2 and cristoballite which is a high-temperature polymorph of silica, meaning that it has the same chemical formula as quartz, SiO2, but a distinct crystal structure.…”

“…In addition to that C5 sample contains a high percentage of SiO2 and cristoballite which is a high-temperature polymorph of silica, meaning that it has the same chemical formula as quartz, SiO2, but a distinct crystal structure. Both quartz and cristobalite are polymorphs with all the members of the quartz group [12].…”

Preparation and characterization of nucleated glass-ceramics based on basaltic rocks

“…So that utilization of this waste is considered an economic importance. In recent years, many investigations have been focused on utilization of by-pass as the raw material to produce crystalline materials because vitrification seems to be one of the most encouraging technological options for this industrial waste [15,16]. Glass-ceramics have traditionally been made from pure raw materials, and the scarcity of many of these raw materials has resulted in the products being relatively expensive.…”

Glass-ceramics in the CaO–MgO–Al2O3–SiO2 system based on industrial waste materials

“…Therefore, it is necessary to determine the relationship between the compositions of glass-ceramics and the crystal phases developed under conditions in which such polycrystalline materials were actually produced. In a previous paper Khater [20] managed to obtain a glass-ceramic material based on by-pass silica sand and magnesite. From cement kiln dust which made up about 57 wt.% of the batch constituents depending on the composition.…”