Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Dwaikhla clay


Study the Physical Properties and Thermal Conductivity of Light Weight Refractories Bricks Produced by Adding porcelanite to Kaolinite

Mohammed H. Al-Taie; Alaa H. Ali; Abeer F.Al-Attar

Engineering and Technology Journal, 2015, Volume 33, Issue 1, Pages 51-60

This research was carried out to manufacture porous refractories bricks from locally raw materials (Porcelanite to Dwaikhla Kaolinite clays). The raw materials were tested by Chemical analysis and XRD to find their suitability to produce light weight ceramic refractories. Different percentages of kaolinite were added as binder to Porcelanite (raw materials). The specimens were pressed to dimensions (30×30) mm according to DIN51053 standards using semi-dry method at pressure of (24.5) MPa. After shaped process all specimens left to dry in air for (24hr) then dried at 110°C using electric oven and the specimens were fired at (1200, 1300 and 1400) °C. The fired specimens were tested to determine their physical and thermal properties including bulk density, porosity, water absorption ,specific gravity and thermal conductivity. It also, was observed that the results were within international standards, and local porcelanite and kaolinite could be used as source raw materials for manufacture light weight refractories.

Characterizations of Semi-Silica Refractory Bricks Produced from Local Iraqi Materials

Mohammed H. Al-Taie; Alaa H. Ali; Abeer F. Al-Attar

Engineering and Technology Journal, 2014, Volume 32, Issue 9, Pages 2268-2276

This research was carried out to investigate the suitability of locally white sand and Dwaikhla clay (Kaolin) for manufacture of semi-silica refractory bricks as thermal insulators for lining the furnaces. Preliminary investigations had been done to determine the physical, chemical, thermal and mechanical properties with mineralogical constitution of raw materials by XRD analysis. Different amounts of kaolinite were added as binder to the white sand (raw materials) of semi-silica bricks. The specimens molded according to DIN standards by using semi-dry pressing method at pressure of (24.516MPa) according to the DIN1068 standards. After drying process at 110°C the specimens fired at firing temperatures (1000, 1100, 1200, 1300 and 1400) °C. The fired specimens have been investigated to determination the physical properties including bulk density, porosity, and the mechanical properties including compressive strength and thermal properties including thermal conductivity. It has been observed from the results that local white sand and kaolinite could be used as possible source raw materials for manufacture semi-silica refractories, mainly required for glass, ceramics factory in Rammadi.