Utilization of the Ibai River Sediment as a Raw Material for Producing Ceramic Glazes

2015 ◽  
Vol 1112 ◽  
pp. 524-527
Author(s):  
Ng Siau Wei ◽  
Mohd Al Amin Muhamad Nor
Keyword(s):  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Local Community ◽  
River Sediment ◽  
Chemical Resistance ◽  
Raw Material ◽  
Firing Process ◽  
Small Scale ◽  
High Concentration ◽  
Shock Resistance

Glazes is a layer of vitreous substance, which is combined to ceramic object through a firing process. The aim of this study is to evaluate the potential of Ibai River sediment as raw material for producing ceramic glazes. Minerals and heavy metal in sediment have been characterized using Atomic Absorption Spectroscopy (AAS) and X-Ray Fluorescence (XRF). Glazes formulation has been studied by adding CaCO3 and stoneware into the sediment at different compositions. Glazes sample was tested for chemical resistance and thermal shock resistance. The AAS results show that sediment contains high Fe content of 65.5000 ppm while amount of Cr, Co and Pb are less than 0.4850 ppm. XRF analysis shows that the presence of important minerals in sediment, which is commonly found in commercial glazes formulation and contributes to formation of good glazes. Matte glazes can be obtained by using only sediment while shiny glaze can be obtained by adding CaCO3 to the sediment as fluxs. High concentration of iron in sediments contributed to brown or reddish brown in color of glazes products. The results show that the glazes produced has chemical resistance towards acids and high thermal shock resistance. As a conclusion, the Ibai River sediment is highly suitable to supply abundant and cheap raw materials for producing decorative ceramic glaze for small-scale ceramic industry in Terengganu, which generate new economic source for local community.

Utilization of Fly Ash in the Synthesis of Refractory Forsterite-Spinel Ceramics

2021 ◽  
Vol 321 ◽  
pp. 131-140
Author(s):  
Martin Nguyen ◽  
Radomír Sokolař
Keyword(s):  
Thermal Expansion ◽  
Fly Ash ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Power Plants ◽  
Linear Thermal Expansion ◽  
Aluminium Oxide ◽  
Raw Material ◽  
Modulus Of Rupture ◽  
Shock Resistance

Forsterite refractory ceramics is utilized in the metallurgical and cement industries as a lining of metallurgical furnaces and rotary kilns for its high refractoriness up to 1850°C and refractoriness under load above 1600°C. Another significant property of forsterite is its coefficient of linear thermal expansion utilized in the electrotechnical industry for ceramic-metal joints. Addition of aluminium oxide into the raw material mixture results in creation of magnesium-alumina spinel (MgO·Al2O3) which improves sintering, thermal shock resistance and mechanical properties in comparison with pure forsterite ceramics. Inexpensive source of aluminium oxide is fly ash. Utilization of fly ash, secondary energetic product of coal-burning power plants, is important for the environment and sustainable development. This paper evaluated properties of fly ash-based forsterite-spinel ceramics in comparison with alumina-based forsterite-spinel ceramics. Forsterite-spinel ceramics was synthesized from olivine, calcined magnesite and fly ash/alumina powders. XRD analysis was used to determine mineralogical composition, thermal analyses were used to determine the behaviour during firing and scanning electron microscopy to determine the morphology of crystal phases. Refractoriness of pyrometric cones, refractoriness under load, thermal shock resistance, coefficient of linear thermal expansion, water absorption, porosity and modulus of rupture were also determined on fired test samples.

Optimizing Performance of Magnesia-Spinel Brick Used at Cement Rotary Kiln

2011 ◽  
Vol 250-253 ◽  
pp. 588-594 ◽  
Author(s):  
Dong Wang ◽  
Yong Li ◽  
Yang Li ◽  
Rui Li ◽  
Yue Li
Keyword(s):  
Grain Size ◽  
Thermal Shock ◽  
Rotary Kiln ◽  
Thermal Shock Resistance ◽  
Raw Material ◽  
Crushing Strength ◽  
Magnesia Spinel ◽  
Cold Crushing Strength ◽  
Comprehensive Performance ◽  
Shock Resistance

Using high pure magnesia and magnesia-spinel as the main raw material, keeping the same quantity of spinel, specimens were made with different spinel size distribution (≤0.044mm, 1-0mm, 2-1mm, 3-2mm and 3-1mm). Dextrin and brine are the binder. Specimens were dried at the temperature of 110°C for 24 hours, sintered at the temperature of 1680°C holding 8 hours in a tunnel kiln. The properties and microstructure of the specimens were analyzed. The results are shown that the addition of spinel with grain size of 3-1mm improves sintering of magnesia-spinel brick, with the thermal shock resistance reaching 18 cycles, the cold crushing strength reaching 54 MPa, improving the comprehensive performance of the magnesia-spinel brick.

Development and Application of Shotcreting Castable for Steel Ladle

2011 ◽  
Vol 396-398 ◽  
pp. 848-853
Author(s):  
Yan Qin ◽  
Guo Tao Liu ◽  
Ze Ming Tong ◽  
Yong Chen
Keyword(s):  
Service Life ◽  
Physical Properties ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Erosion Resistance ◽  
Raw Material ◽  
Steel Ladle ◽  
Shock Resistance ◽  
Good Workability ◽  
Aluminate Cement

The article mainly introduct the development and application of shotcreting castable for metallurgical steel ladle. The shotcreting castable mainly use tabular alumina, white fused corundum, fused spinel, aluminate cement, alumina micro powder, fused magnesium as raw material, After studied by the workability and physical properties of gunning machine, it is proved by application in steel ladle, the shotcreting castable has a good workability, with higher adhesive rate, faster hardening speed, better thermal shock resistance and stronger erosion resistance ability. So the shotcreting castable has a higher service life.

scholarly journals Impact of Fly Ash as a Raw Material on the Properties of Refractory Forsterite–Spinel Ceramics

Minerals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 835
Author(s):  
Martin Nguyen ◽  
Radomír Sokolář
Keyword(s):  
Fly Ash ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Power Plants ◽  
Raw Materials ◽  
Raw Material ◽  
Modulus Of Rupture ◽  
Shock Resistance ◽  
Refractory Ceramics ◽  
The Impact

This article examines the process for the synthesis of forsterite–spinel (2MgO·SiO2/MgO·Al2O3) refractory ceramics from fly ash and alumina as sources of aluminum oxide. Raw materials were milled, mixed in different ratios and sintered at 1500 °C for 2 h. Sintered samples were characterized by XRD, thermal analyses and SEM. Porosity, water absorption, bulk density, refractoriness, refractoriness under load and thermal shock resistance were also investigated. The impact of fly ash as a raw material was investigated in accordance with the resulting properties and microstructure of samples with fly ash and alumina as the raw materials. Due to the positive effect of flux oxides (iron oxides and alkalis) on sintering, the mullite contained in fly ash completely decomposed into silica and alumina, which, together with magnesium oxide, formed spinel. This led to improved microstructural and mechanical properties and thermal shock resistance. In particular, mixtures with 10 wt.% and 20 wt.% of fly ash had the most promising results compared to alumina mixtures. Both modulus of rupture and thermal shock resistance were improved, while the impact on refractory properties was minimal. The novelty of this research lies in the recycling of fly ash, a by-product from coal-burning power plants, into a raw material for the production of forsterite–spinel refractory ceramics.

Improvement of Thermal Shock Resistance Performance of High Alumina Ceramic Filter Support

2013 ◽  
Vol 750-752 ◽  
pp. 525-528
Author(s):  
Yue Chao Tian ◽  
Xi Liu ◽  
Hui Tang ◽  
Jing Long Bu ◽  
Dong Mei Zhao ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Bending Strength ◽  
Raw Materials ◽  
Ceramic Materials ◽  
Raw Material ◽  
Ceramic Filter ◽  
High Alumina ◽  
Gas Cleaning ◽  
Shock Resistance

Mullite-corundum multiphase ceramic materials were prepared at 1400°C for 2h with bauxite chamotte and clay clinker as raw material (size<74 μm), molded at pressure of 50 MPa. Effect of raw materials composition on sintering and themal shock resistance of composite were researched by measurements of apparent porosity, bending strength，thermal shock resistance and thermal expansion rates, and analysed by XRD and SEM. The results showed that the best weigh percentage of raw materials with better sintering and themal shock resistance are bauxite chamotte 50 wt%, clay clinker 50wt% for mullite-corundum multiphase ceramic materials. The test results for high temperature gas cleaning dust removal technology development and the application of the composite ceramic material has important application value.

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