Glass-ceramics fabricated by efficiently utilizing coal gangue

Abstract

Glass-ceramics with high strength and lightweight were developed by comprehensively utilizing coal gangue and clay. This work optimized the many processing parameters including the rate of using coal gangue, coal gangue to clay ratio, mineralizers, and process of forming and sintering. Using coal gangue of 75% and coal gangue to clay ratio of 3/1 made the mechanical properties optimal. The sintering temperature of 1370°C was found to be optimal because mullite and spinel become the main crystal phase and thereby realizing high strength, low water absorbance, and low density for the sintered glass-ceramics. The mechanical properties of the glass-ceramics were further enhanced by adding mineralizer (TiO 2 , ZnO, and MnO 2 /dolomite) with reasonable amounts. Moreover, the properties were enhanced by optimizing processing parameters. We developed an excellent approach to sinter glass-ceramics illustrated high strength, lightweight, and low water absorption by efficiently utilizing and managing waste minerals. The sintered glass-ceramics can be used as high-performance proppant materials, cooking ceramics, and building materials ARTICLE HISTORY

Mechanical properties of in situ synthesized mullite‐based composite ceramics with three‐dimensional network structure

“…Coal gangue can be considered as a potential mineral resource since it has a high content of aluminum and silicon oxides. In recent years, as building materials, coal gangue can be used to prepare refractory bricks, filling of underground mined areas, cement, lightweight aggregate, and ceramsite 6 . Also, it has been employed to prepare decorative materials and aluminosilicate polymer gels.…”

“…In recent years, as building materials, coal gangue can be used to prepare refractory bricks, filling of underground mined areas, cement, lightweight aggregate, and ceramsite. 6 Also, it has been employed to prepare decorative materials and aluminosilicate polymer gels. Furthermore, the production of high-value industrial new materials, such as silica, molecular sieve, functional ceramics, refractories, and so forth, is also an effective way to increase the added value of coal gangue.…”

Effect of Cr2O3 on the crystallization, structure, and properties of Ti-bearing blast furnace slag-based glass ceramics

“…In addition, according to previous studies [3,7,20,21], TiO 2 can be regarded as a good nucleating agent to control the crystallization behavior of glass ceramics. As a result, the low Ti-bearing blast furnace slag can be a good candidate for the preparation of slag-based glass ceramics [22], where a small amount of TiO 2 in the Tibearing blast furnace slag can be the nucleating agent. In our previous work [23], the effects of TiO 2 on the crystallization behavior of Ti-bearing blast furnace slag-based glass ceramics were investigated.…”

Use of Coal Gangue to Prepare Refractory Saggars with Superior Corrosion Resistance and Thermomechanical Properties for the Calcination of Li-Ion Battery Cathode Materials

“…11−13 In response to these issues, many researches have been conducted using coal gangue as the starting materials to prepare mullite-based materials, e.g., ceramics, ceramic−glass, and whiskers. 14,15…”

“…However, supplemental high-quality alumina sources, for instance, Al 2 O 3 , bauxite, and Al(OH) 3 , are needed since coal gangue is rich in SiO 2 14,15. Moreover, mullite is prone to attack by LNCM precursors/materials during its application.…”