The difference between electric fused bricks and clay bricks
2023年04月24日
Electric fusion bricks and clay bricks are both refractory materials and have a wide range of uses in building materials. Today, Yuhua Electric Fusion Technology will introduce their differences to everyone:
1. Electric fused brick is a white solid formed by injecting pure aluminum oxide powder and zircon sand containing about 65% zirconia and 34% silicon dioxide into the model for cooling after melting in an electric furnace. Its petrographic structure is composed of an eutectoid of corundum and zircon plagioclase, and a glass phase. From a metallographic perspective, it is an eutectoid of corundum and zircon plagioclase, and the glass phase is filled between their crystals.
2. Artificial small blocks used in construction. Also known as sintered bricks. Clay bricks are made from clay (including shale, coal gangue and other powders) as the main raw material, and are processed, formed, dried, and roasted with mud. During the Spring and Autumn period and the Warring States period, China successively created square and long shaped bricks. During the Qin and Han dynasties, the technology and production scale, quality, and variety of patterns of brick making were significantly developed, known as "Qin bricks and Han tiles". The size of ordinary bricks is 240 millimeters × 115 mm × 53mm, according to the compressive strength (N/square millimetre, N/mm2), it can be divided into six strength grades: MU30, MU25, MU20, MU15, MU10 and MU7.5.
3. Clay bricks are locally sourced, inexpensive, durable, and have advantages such as fire prevention, insulation, sound insulation, and moisture absorption, making them widely used in civil and construction engineering. Scrap bricks can also be used as aggregates for concrete. In order to improve the disadvantages of small size, heavy weight, and high soil consumption of ordinary clay bricks, they are developing towards lightweight, high-strength, hollow, and large blocks. Lime sand brick is made of lime and quartz sand, sand or fine sandstone in proper proportion, after being ground, mixed with water, semi dry pressed and cured by autoclave. Fly ash bricks are made from fly ash as the main raw material, mixed with cementitious materials such as coal gangue powder or clay, and then batched, formed, dried, and roasted. They can fully utilize industrial waste residue and save fuel.
The Al2O3 content of clay bricks in China is generally above 40%, while the Fe2O3 content is less than 2.0-2.5%. The proportion of clinker in the ingredient is 65-85%, and the proportion of combined clay is 35-15%. Mix and grind the crushed clay and finely ground clinker, and then prepare a semi dry slurry together with granular clinker. It is high-pressure formed and fired at about 1400 ℃, with good performance. Clay bricks exhibit weak acidity at high temperatures and have slightly poor resistance to alkaline slag erosion, but they increase with the increase of Al2O3 content. The thermal stability is better than that of silica bricks, magnesia bricks (see magnesia bricks), etc.
Blast furnace clay bricks are vacuum phosphoric acid impregnated and secondary low-temperature fired phosphoric acid impregnated products after drying treatment, used for laying the upper lining of the blast furnace shaft.
Overall, electric fused bricks are mainly used in the glass industry and serve as refractory bricks for glass kilns.
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Electric fusion bricks and clay bricks are both refractory materials and have a wide range of uses in building materials. Today, Yuhua Electric Fusion Technology will introduce their differences to everyone:
Refractory bricks are abbreviated as firebricks. Refractory materials made by firing refractory clay or other refractory materials. Light yellow or brownish in color. Mainly used for building smelting furnaces, capable of withstanding high temperatures ranging from 1580 ℃ to 1770 ℃. Also known as firebricks. Refractory materials with a certain shape and size. According to the preparation process, it can be divided into fired bricks, unburned bricks, electric fused bricks (fused cast bricks), and fire-resistant and insulated bricks; According to shape and size, it can be divided into standard bricks, ordinary bricks, special bricks, etc. It can be used as high-temperature building materials and structural materials for building kilns and various thermal equipment, and can withstand various physical and chemical changes and mechanical effects at high temperatures. For example, refractory clay bricks, high alumina bricks, silica bricks, magnesium bricks, etc.
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