What are the standard specifications for calcined kieselguhr?

Jun 02, 2025

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Sarah Liu
Sarah Liu
As a Quality Control Specialist at Qingdao Shengtai Industry Co., Ltd., I ensure that every product we produce meets the highest international standards. My journey in the diatomaceous earth industry has allowed me to witness firsthand the transformation of raw materials into life-changing solutions for various industries.

Calcined kieselguhr, also known as calcined diatomite, is a versatile and valuable industrial material with a wide range of applications. As a leading supplier of calcined kieselguhr, I am often asked about the standard specifications for this product. In this blog post, I will delve into the key standard specifications of calcined kieselguhr, explain their importance, and highlight how our products meet or exceed these standards.

Physical Properties

Particle Size Distribution

The particle size distribution of calcined kieselguhr is a critical specification. It significantly impacts the material's performance in various applications. For filtration applications, a narrow and well - controlled particle size distribution is essential. A uniform particle size ensures consistent flow rates and efficient removal of impurities. Our calcined kieselguhr is carefully processed to achieve a precise particle size distribution. This allows for optimal performance in applications such as Diatomite Filter Aid for Chemical, where it can effectively filter out fine particles from chemical solutions.

Bulk Density

Bulk density is another important physical property. It refers to the mass of the material per unit volume in its loose, uncompacted state. The bulk density of calcined kieselguhr affects its handling, storage, and transportation. A lower bulk density can reduce shipping costs as more material can be transported in a given volume. Our products are engineered to have an appropriate bulk density, balancing ease of handling and cost - effectiveness.

Porosity

Porosity is a defining characteristic of calcined kieselguhr. The high porosity of this material provides a large surface area, which is beneficial for adsorption and filtration processes. The pores in calcined kieselguhr can trap particles of various sizes, making it an excellent filter aid. In Food Grade Diatomite Filter Aid, the high porosity allows for the removal of contaminants from food and beverage products without affecting the taste or quality.

Chemical Properties

Silica Content

Silica is the main component of calcined kieselguhr. A high silica content is desirable as it provides chemical stability and resistance to corrosion. Our calcined kieselguhr has a very high silica content, typically above 90%. This high silica content ensures the material's durability and suitability for use in harsh chemical environments.

Impurity Levels

The levels of impurities in calcined kieselguhr are strictly controlled. Impurities such as heavy metals, iron, and alumina can affect the material's performance and may also pose health risks in certain applications. We adhere to strict quality control measures to ensure that our products have low impurity levels. For example, in Soil Treatment Diatomaceous Earth, low impurity levels are crucial to prevent any negative impact on soil quality and plant growth.

pH Value

The pH value of calcined kieselguhr can vary depending on its processing and the presence of any additives. In most cases, a neutral or slightly alkaline pH is preferred. A stable pH value is important to maintain the chemical stability of the material and its compatibility with other substances in various applications.

Performance - Related Specifications

Filtration Efficiency

Filtration efficiency is a key performance indicator for calcined kieselguhr used as a filter aid. It is measured by the ability of the material to remove particles of a specific size from a fluid. Our products are tested rigorously to ensure high filtration efficiency. This is achieved through careful control of the particle size distribution and porosity, which allows for the effective capture of particles while maintaining a reasonable flow rate.

Adsorption Capacity

In applications where adsorption is required, such as in environmental remediation or water treatment, the adsorption capacity of calcined kieselguhr is crucial. The high surface area and porosity of our products enable them to adsorb a wide range of substances, including organic compounds, heavy metals, and odorous substances.

Quality Control and Certification

We understand the importance of meeting and exceeding industry standards. Our manufacturing process is subject to strict quality control measures at every stage. From the selection of raw materials to the final packaging, we ensure that our calcined kieselguhr products meet all the relevant standard specifications. We also hold various certifications, which attest to the quality and safety of our products.

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Why Choose Our Calcined Kieselguhr?

  • Consistent Quality: Our products are manufactured under strict quality control, ensuring consistent performance in every batch.
  • Customization: We can customize the specifications of our calcined kieselguhr to meet the specific requirements of our customers. Whether it's a particular particle size distribution or a specific chemical composition, we can tailor our products to suit your needs.
  • Technical Support: Our team of experts is available to provide technical support and advice. We can help you select the right product for your application and offer guidance on its proper use.

Contact Us for Procurement

If you are interested in purchasing calcined kieselguhr or have any questions about our products, please feel free to contact us. We are committed to providing high - quality products and excellent customer service. Our sales team will be happy to discuss your requirements and provide you with a competitive quote.

References

  • Handbook of Industrial Minerals and Rocks.
  • Journal of Filtration Science and Technology.
  • Environmental Science and Technology Journals related to diatomite applications.
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