Cryogenic grinding technology involves cooling the materials to be grinded and reusing them into smaller particles before mixing them. To make it simple, the materials are cooled and embrittled using code nitrogen and then crushed. This gives fine particles the same product quality as the original. This type of grinding process is one of the most popular grinding techniques. 

Cryogenic grinding technology is unique because it is used for applications where dry or wet milling cannot reduce the materials. The liquid nitrogen used in the process simplifies the grinding process and makes it easier to reduce the materials. Cryogenic grinding allows for accurate particle size distribution, which is extremely important in food processing. Proper particle size distribution is essential due to:

• Product improvement: particle size distribution can affect the product’s safety, shelf life, efficacy and manufacturability. 
• Regulatory compliance: Particle size distribution measurements help determine compliance with regulations and industry standards.
• Contamination status: It also helps determine whether the product is free from contaminants and helps identify the possible sources of contamination without impacting product quality and improving quality control. 

Cryogenic Grinding Uses

Cryogenic grinding technology is used for:

• Reducing material temperature: Cryogenic grinding helps reduce material temperature below their glass transition temperature. 
• Preventing overheating: Cryogenic grinding helps with temperature control and keeps the material from overheating.
• Helps avoid degradation: Cryogenic riding assists in oxygen exclusion and prevents the materials from degrading when new surfaces are formed.

Advantages of Cryogenic Grinding

• Cryogenic grinding creates ultra-fine particle grinding: Cryogenic grinding produces finer ground particles than traditional grinding methods. It can produce particles with a size of 10 micrometres.
• Prevents caking: Cryogenic grinding safeguards temperature-sensitive materials against thermal deterioration, eliminating the risk of product packaging.
• Helps grind sensitive materials: Since some ingredients are temperature-sensitive, the liquid nitrogen used in the process eases the process and also improves grinding efficiency.
• Offers uniform particle distribution: Cryogenic grinding generates ultra particles within narrow distribution ranges. Cryogenic grinding systems often come with customizable sieving systems, which allow materials to be evenly categorised to ensure maximum yield, improved product performance, and stability.
• Increases production rate: Cryogenic grinding optimises particle size, making them easier to process. This helps reduce production times and ensures maximum output by increasing particle yield. 
• Improved safety: Cryogenic grinding makes the process safer by creating an inert environment that protects against oxidation and fire, thus improving operational safety.
• Preserve product quality: One primary advantage of cryogenic grinding is that it reduces the product size to the required measure without compromising quality. This is an important aspect across various industries, especially food products. This process also prevents thermal degradation, hence retaining the needed standard.
• Eliminates thermal degradation: Cryogenic grinding allows the operator to handle the temperature management challenges associated with industrial grinding. It embrittles the materials, allowing them to fracture instead of melting, grinding, or deforming. This makes the method attractive to manufacturers across industries.
• Cryogenic grinding offers good grindability for products with a high fat, oil, and moisture content, and the grounded material remains free-flowing. 
• No thermal damage occurs due to overheating of temperature-sensitive substances.

Cryogenic Grinding Applications in the Food Industry

One of the most critical applications of cryogenic grinding is in the food processing industry. Various food processing techniques rely on cryogenic grinding to optimise operations by reducing raw materials and products into particulate form. These systems are perfect for grinding and processing spices while maintaining their flavour.

Cryogenic Grinding for Spices and Food

Many spices, such as cumin, cinnamon, pepper, cloves, cardamom, and other food products, are best used in their powder form. High temperatures are generated by the grinding energy depending on the spices’ hardness, strength, and elasticity. This leads to the sticking of sensitive and oily substances, and flavours and aromas can also be lost during the process. However, cryogenic grinding allows the products to be gently ground with a higher proportion of the essential oils retained. The product quality is also maintained throughout the entire process. 

How Cryogenic Grinding for Spices Works?

Cryogenic grinding uses liquid cryogenic nitrogen or carbon dioxide to reduce the temperatures of the feed material. The paddle screw cooler of the cryogenic grinding equipment freezes the regrind’s high fat or oil content and makes it brittle. The spices remain free-flowing and are easier to grind. Cryogenic grinding avoids the undesirable rise in temperature caused by the electrical energy of the motors while ensuring high product quality. The valuable ingredients, like vitamins and essential oils,  remain contained in the material.

The Bottom Line

Cryogenic grinding offers a wide range of benefits, especially for food processing. It helps achieve ultra-fine particle grinding, eliminates thermal degradation, and increases production rates, all while maintaining product quality. Hence, investing in high-quality cryogenic grinding systems can help improve your return on investment. A reliable and leading provider of cryogenic grinding systems can help with your size reduction needs and understand your grinding requirements. So, look for a provider who can help you achieve personalised solutions.