What is Refractory?

Refractory is made of various materials that can withstand high temperatures and resist chemical corrosion. These materials typically have high melting points and stable chemical inertness. They can maintain strength and structural stability under high temperature applications. Due to their superior high-temperature resistance, they are widely used in various industries for high-temperature processing.
Kerui Refractories

What Are Refractories Made Of?

Fire refractory are composed of minerals, natural materials, or composite materials that can withstand high temperatures, such as aluminum, silica, magnesia, calcium carbonate, boron oxide, chromium oxide, zirconium oxide, clay, alumina, magnesite, and so on. These raw materials themselves have excellent properties and are important raw materials for refractory and ceramic insulation.

In Xinmi City, Zhengzhou, Henan Province, China, there are abundant insulation refractory raw materials known as the “treasure mine” of Zhengzhou. The main raw materials in this area include clay, kaolin, quartzite, diabase, bauxite, magnesite, dolomite, chromite, and more. These rich and high-quality refractory raw materials provide significant material support for the local mature Kerui refractory industry.

How Are Refractory Materials Classified?

Refractory materials can be classified based on various dimensions such as composition, shape, physical properties, chemical properties, etc.

Chemical Composition

Insulating refractories can be classified into acidic materials, alkaline materials, and neutral materials based on their chemical composition.

  • Acidic materials mainly include quartz, quartzite, diatomaceous earth, siliceous materials, etc., suitable for acidic chemical environments.
  • Alkaline materials mainly include dolomite, dolomite, magnesite, olivine, chromite, etc., which can resist alkaline chemical corrosion in high-temperature environments.
  • Neutral materials mainly include carbonaceous materials, alumina, chromite, silicides, etc., with certain resistance to erosion in acidic and alkaline working environments.

Physical Form

Refractory materials are divided into shaped refractory materials and unshaped refractory materials based on physical form.

  • Shaped refractory materials refer to bricks made by pressing refractory raw materials and additives.
  • Monolithic refractories mainly include cement, ramming materials, sand, castables, etc. They can be shaped and sized according to construction needs.

What Are the Characteristics of Thermal Refractory?

To select suitable refractory materials, partners need to consider the physical and chemical properties of refractory materials. Generally, refractory materials have the following characteristics. Each type of raw material may have slight differences in performance. Kerui Refractory can provide you with detailed consultation solutions.

  • High Refractoriness;
  • High Softening Temperature;
  • Strong Resistance To Chemical Corrosion;
  • Good Thermal Shock Resistance;

What Are the Applications of Refractory Materials?

Refractory materials have wide applications in high-temperature industries, such as furnaces, furnace linings, slag lines, refractory material production and processing, ceramics, transportation vehicles, building materials, electronic components, magnesium alloys, fertilizers, glass, etc.

Where to Get Quality Refractory?

Kerui Refractory offers refractory products and customized solutions for partners. Kerui’s quality products can help improve safety and longevity in your high temperature industry. If you are interested in these products, contact us right now!