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Spice grinder type: Low temperature grinding machine
Usage: Especially for medium to high oil content spice grinding use or for heat-sensitive spices
Temperature control: by cold air machine or by liquid nitrogen
Grinder series: SLU, SL, SLA, SLD series
Function: lower the grinding temperature, spice grinding
The grinder we are going to introduce here is our low temperature grinding machine, specially designed for spices. Below we provide a detailed introduction to the working principle, classification, and application advantages of such type spice grinder. Hope that it will be helpful for you to solve problems such as clumping, material blockage, and discoloration encountered when pulverizing high-oil-content spices at room temperature.
This is a specialized grinding equipment designed for processing high-oil-content, heat-sensitive spices. By lowering the grinding process temperature, it effectively solves problems such as yellowing, oil seepage, powder agglomeration, and equipment blockage that occur during room-temperature pulverization.
Conventional grinders face the following problems when pulverizing high-oil-content spices:
Problem | Performance | Consequence |
Significant temperature rise | Friction generates heat during pulverization, reaching temperatures of 60-80℃. | Aroma volatilization, quality degradation |
Yellowing | High temperature causes material oxidation and discoloration. | Damage to product appearance. |
Oil seepage | Oil liquefies and seeps out at high temperatures. | Powder agglomeration, poor flowability. |
Material Blockage | Seeped-out oil adheres to the screen and mill chamber, etc. | Equipment blockage, production interruption. |
Typical ingredients: spices with high oil content such as peppercorns, cumin, white pepper, nutmeg, and mustard seeds.
Value | Explanation |
Preserve color | Low temperature prevents oxidation and discoloration, resulting in a natural product color. |
Retain aroma | Low temperature inhibits aroma volatilization, resulting in a richer flavor. |
Prevent clumping | Oils remain solid, resulting in loose powders that do not clump. |
Avoid clogging | No oil seepage, ensuring smooth equipment operation. |
Improved fineness | Materials that have become brittle are easier to grind, resulting in finer particles. |
Based on cooling methods and temperature ranges, low-temperature spice grinders are mainly divided into two categories:
1)Working Principle: Based on a regular grinder, a low-temperature air-cooling system is added, introducing 5-10℃ cold air (or near-0℃ cold air) into the grinding chamber to directly lower the temperature.
Item | Parameters |
Cooling temperature | 5-10℃ (cold air), near-0℃ (forced cooling) |
Cooling medium | Cold air |
Refrigeration method | Air cooler (similar to air conditioning principle) |
Refrigerant | Environmentally friendly refrigerants such as R22/R134a. |
Maintenance cycle | No need for frequent refrigerant replenishment, can be used for 1 year or even longer. |
2)Applicable Materials: Spices with medium to high oil content (such as red pepper, white pepper, cumin, etc.)
3)Applicable Grinder: For our SLU series, SLA series and SL series, they can work together with the air cooling device. Following is the working video of our SLU series grinder with the cold air machine for your reference:
1)Working Principle: By injecting liquid nitrogen (-196℃) into the grinding chamber, the material is directly frozen and brittle, then ground by blades. This is not simple cooling, but deep freezing.
Item | Parameters |
Cooling temperature | -196℃ (Liquid nitrogen boiling point) |
Cooling medium | Liquid nitrogen |
Refrigeration method | Direct liquid nitrogen injection |
Liquid nitrogen consumption | Approximately 1kg liquid nitrogen/kg material |
Operating cost | Relatively high (requires continuous liquid nitrogen replenishment) |
2)Applicable Materials: Spices with extremely high oil content (such as nutmeg, mustard seeds, etc.), highly heat-sensitive materials, and products requiring ultra fine grinding.
3)Applicable Product: SLD series cryogenic grinder
To clearly show you the difference of the two type grinding machines, you can see the comparison analysis below:
Comparison Dimensions | Cold Air Cooling Grinding Mill | Liquid Nitrogen Cryogenic Grinding Mill |
Cooling temperature | 5℃ to near 0℃ | -196℃ |
Cooling effect | Reduces grinding chamber temperature | Freeze materials to brittleness |
Fineness performance | No change, only lower the grinding temperature | Easy to grind spices into fine powder, 100-300mesh. |
Operating cost | Low (Power consumption only) | High (Require continuous purchase of liquid nitrogen) |
Applicable materials | Medium to high oil content spices | Extremely high oil content, highly heat-sensitive materials |
Equipment investment | Medium | High |
The two types of low temperature grinders have different working principles, which are explained in detail below.
1)Workflow:
● An air cooler cools ambient air to 5-10℃ (or lower).
● The cold air is delivered into the grinding chamber through pipes.
● The cold air directly carries away the frictional heat generated during pulverization.
● The material remains brittle at low temperatures, reducing oil seepage.
● The pulverized, low-temperature powder is discharged normally.
2)Usage instructions:
● Connect the cold air machine and the grinder via pipes.
● Only one air cooler is needed.
● No frequent refrigerant refills are required.
● The refrigeration system can operate continuously for more than one year.
1)Working Process:
● Liquid nitrogen is injected into the grinding chamber from the storage tank.
● The material is rapidly frozen and brittle at -196℃.
● Blades impact and grind the brittle material.
● The ground powder is discharged at low temperature.
2)Usage:
● Requires continuous replenishment of liquid nitrogen source.
● Liquid nitrogen consumption is approximately 1 kg liquid nitrogen/kg material.
● Suitable for extremely high oil content or ultra fine grinding requirements.
Following is the video of the cryogenic grinder machine for mustard seeds grinding for your reference, the final powder is 100-300mesh:
After learning the concept and working principle of the low temperature grinders, let us focus on the specific grinder series.
Model | Processing Capacity | Cooling Temperature | Applicable Materials | Features |
SLU series | 20-1500kg/h | Usually 0-10℃(customized) | Chili pepper, cumin, white pepper, etc | Economical, high cost performance |
SL series | 70-1500kg/h | Usually 0-10℃(customized) | Chili pepper, black pepper, cumin, etc | Equipped with dust removal system, environmentally compliant. |
SLA series | 50-1000kg/h | Usually 0-10℃(customized) | Black pepper, ginger, turmeric, white pepper, etc | Fine grinding performance, handle low oil to medium oil spices. |
Model | Processing Capacity | Cooling Temperature | Applicable Materials | Features |
SLD series | 50-1000kg/h | -196℃ | All spices | High-end ultra fine powder products |
Low temperature grinding machines for spices are professional equipment for solving the problem of pulverizing spices with high oil content:
Technical Route | Applicable Scenarios | Core Advantages | Investment Cost |
Cold air low-temperature grinder | Medium to high oil content spices | Simple to use, low operating costs, convenient maintenance | Medium |
Liquid nitrogen cryogenic grinder | Extremely high oil content, ultra fine powder requirements | Freeze-crystallization, extremely high fineness, best results | High |
Core Values:
● Solve temperature rise issues, preventing yellowing.
● Control oil seepage, avoiding clumping and material blockage.
● Retain natural aroma, improving product quality.
● Improve pulverization fineness, expanding application areas.
If there is any interest or enquiry for this special spice grinder machine, welcome to contact us.
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