Silica Bricks For Coke Oven

2025-01-10

Silica Bricks For Coke Oven

Silica bricks for coke ovens are refractory products primarily composed of quartzite, used for lining coke ovens. Below is a detailed introduction to silica bricks for coke ovens:

1. Main Raw Materials and Composition

Silica bricks for coke ovens are primarily made from high-purity silica (SiO₂) that has been carefully processed, with a SiO₂ content typically over 94%. The main mineral phases are tridymite and quartz. During production, quartz sand and refractory clay are also used as auxiliary materials to ensure the quality and performance of the silica bricks.

2. Production Process

The production process of silica bricks for coke ovens generally involves the following steps:

Raw Material Preparation: The raw materials, including silica, quartz sand, and refractory clay, are screened, crushed, and ground to ensure the particle size meets the required specifications.

Mixing: The processed raw materials are placed in a mixer, where a certain proportion of water is added. The mixture is stirred to ensure thorough blending and create a binding force.
Shaping: The mixed material is formed into bricks using molds. Common shaping methods include pressure molding, extrusion molding, and vibration molding.
Drying: The shaped bricks are placed in a special drying furnace for initial baking to remove residual moisture and organic substances, ensuring that the shape of the bricks remains stable.
Sintering: The dried bricks are placed in a high-temperature kiln for further heating, allowing the silica and quartz sand to undergo chemical reactions, forming a more stable silicate structure. This process enhances the bricks' resistance to thermal shock and corrosion.

3. Key Features

High Refractoriness: Silica bricks typically have a refractoriness of 1650°C or higher, with some reaching over 1700°C. They can withstand the high-temperature operating conditions of coke ovens, typically over 1000°C.

Excellent Acid-Base Resistance: Silica bricks have good resistance to acidic and neutral molten substances.

High Strength: Silica bricks maintain good mechanical strength even at high temperatures and are not easily deformed or cracked.

Thermal Shock Resistance: Silica bricks exhibit strong adaptability to temperature changes and are less likely to crack in environments with sudden temperature fluctuations.

Thermal Conductivity: Silica bricks have good thermal conductivity, which helps evenly distribute heat within the furnace, improving the efficiency of coke oven operations.

4. Applications

Silica bricks for coke ovens are mainly used in the furnace walls, furnace roofs, and other key areas of coke ovens, providing insulation and refractory protection. They constitute a major part of the coke oven's basic components (such as the heat storage chamber walls, inclined flues, combustion chambers, and carbonization chambers), making up 60% to 70% of the total refractory brick used. Additionally, silica bricks are widely used in high-temperature kilns, industrial furnace chambers, insulating layers, and other refractory materials.

5. Market Outlook

In recent years, with the rapid development of the global steel industry and the continuous growth in demand for coke, the market for silica bricks for coke ovens has flourished. In the coming years, the global market for silica bricks for coke ovens is expected to maintain its growth trajectory. On the one hand, the demand for silica bricks in traditional industries such as steel and glass will continue to increase. On the other hand, with the rapid development of emerging industries such as new energy and new materials, the application fields of silica bricks for coke ovens will further expand.

In summary, silica bricks for coke ovens, as a critical material in the coke production industry, are characterized by high refractoriness, excellent acid-base resistance, high strength, thermal shock stability, and good thermal conductivity. They play a crucial role in the construction of coke ovens, ensuring the durability and efficiency of the furnace. Furthermore, with the ongoing global economic development and the optimization of industrial structures, the market for silica bricks for coke ovens is poised for even greater growth and opportunities.

About Rongsheng Refractory

Henan Rongsheng Xinwei New Materials Research Institute Co., Ltd., headquartered in Zhengzhou City, Henan Province, is affiliated to Henan Rongsheng Technology Group. Rongsheng Refractory has been the leading manufacturer, supplier, and exporter of top-quality refractory materials for more than 20 years. Our product range includes high alumina bricks, corundum bricks, AZS bricks, magnesia bricks, fire clay bricks, insulating bricks, and unshaped materials such as refractory castable, refractory cement, refractory mortar, refractory ramming mass, refractory spraying mass, refractory plastic, and more. Our diverse product range caters to 90% of the refractory needs in industries like iron and steel, cement, non-ferrous, power, petrochemical, and glass industries. Our products are exported to more than 100 countries and regions around the world. We are renowned as one of the top refractory brick suppliers and refractory material suppliers in the industry.

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