Microsilica
Microsilica: A Versatile Additive with Diverse Applications
Microsilica, also known as silica fume, is a highly reactive pozzolanic material that finds applications in various industries, including construction, cement, and refractory materials. It is a byproduct of the production of silicon metal and ferrosilicon alloys.
Khorshid Alyazh: A Leading Producer of Microsilica
Among the prominent producers of μ-SiO2 is Khorshid Alyazh, a Qazvin-based company in Iran. With state-of-the-art facilities and a dedicated team of experts, Khorshid Alyazh has established itself as a reliable supplier of high-quality μ-SiO2 globally.
Production Process
Microsilica is produced as a byproduct of the electric arc furnace process used in the production of silicon metal and ferrosilicon alloys. The process can be summarized as follows:
- Raw Materials: Khorshid Alyazh sources high-grade quartz and coal to produce silicon metal and ferrosilicon alloys.
- Electric Arc Furnace: The raw materials are charged into an electric arc furnace, where an electric arc creates intense heat.
- Reduction: The intense heat causes the quartz to reduce and combine with the carbon from the coal to form silicon metal or ferrosilicon alloys.
- μ-SiO2 Formation: During the reduction process, a significant amount of silicon monoxide (SiO) gas is produced. This gas is oxidized to form μ-SiO2 particles, which are collected using baghouses or cyclones.
- Collection and Packaging: The collected μ-SiO2 particles are packaged in bulk bags or other suitable containers for distribution.
Product Specifications
Khorshid Alyazh produces microsilica in accordance with international standards, including ASTM C1240 and EN 13263-1. The typical specifications of its products include:
- SiO2 Content: >90%
- Specific Surface Area: >20 m2/g
- Bulk Density: 250-350 kg/m3
- Loss on Ignition: <5%
- Moisture Content: <1%
Applications
Microsilica is primarily used as an additive in the following applications:
- Concrete: Microsilica enhances the strength, durability, and abrasion resistance of concrete. It is used in high-performance concrete, self-compacting concrete, and other specialized concrete applications.
- Cement: Microsilica is added to cement to improve its strength and reduce its permeability. It is used in the production of blended cements and high-performance cements.
- Refractory Materials: Microsilica is used in the production of refractory bricks and mortars, which are used in high-temperature applications, such as furnaces and kilns.
- Other Applications: Microsilica also finds applications in the production of ceramics, paints, and coatings.
Competitive Advantages
Khorshid Alyazh has established a competitive edge in the microsilica market through:
- High Quality Standards: Stringent quality control measures ensure the consistency and reliability of its products.
- Technical Expertise: The company’s team of experienced engineers and metallurgists provides technical support and customized solutions to its customers.
- Global Reach: Khorshid Alyazh exports its products to over 20 countries worldwide, including the US, Europe, and Asia.
- Customer Focus: The company prioritizes customer satisfaction and strives to meet their specific requirements through tailored solutions.
In conclusion, microsilica is a versatile additive with diverse applications in various industries. Khorshid Alyazh plays a significant role in meeting the global demand for this material through its commitment to quality, technical expertise, and customer focus. The company has earned a reputation as a reliable and innovative supplier in the microsilica industry.
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