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A grain roughness separator, also known as a grain pre-cleaner or a rough cleaner, is an agricultural machine used primarily to remove impurities and roughage from harvested grain before further processing or storage. This equipment is essential in the grain processing industry to ensure the quality and purity of grain products.

How It Works:

The grain roughness separator typically operates using a combination of sieving and air blowing mechanisms. The grain is fed into the machine where it passes over a series of vibrating screens. These screens have openings of various sizes to catch larger impurities while allowing the grain to fall through.

Simultaneously, a fan system generates an airflow that blows lighter impurities away from the heavier grain. The combination of these two actions effectively separates the roughage from the grain.

Product parameters

The performance and suitability of a Grain Roughness Separator for a specific application are determined by various parameters and specifications. When selecting or evaluating a grain roughness separator, consider the following key parameters:

Throughput Capacity: The amount of grain the machine can process per unit of time, usually measured in tons per hour (t/h).

Cleaning Efficiency: The percentage of impurities removed from the grain during the separation process.

Grain Loss: The amount of good grain that is mistakenly removed with impurities, which should be minimized.

Adjustability: The ability to adjust settings such as air flow

Product Features


Enhanced Product Quality: Results in cleaner grain, free from contaminants, which is essential for food safety and quality.

Protection of Downstream Equipment: Prevents damage to further processing machinery by removing larger and potentially harmful materials.

Increased Storage Life: Clean grain stores better and for longer periods, reducing waste and preserving value.

Grain roughness separators are a critical component in the agricultural supply chain, providing the first step in ensuring that grain products are clean, safe, and ready for consumption or further processing.

Key Features of a Grain Roughness Separator:

Efficiency: Designed to quickly and effectively separate unwanted materials such as straw, chaff, dust, and other foreign objects from the grain.

Versatility: Capable of handling various types of grains, including wheat, rice, corn, barley, and more.

Adjustability: Often equipped with adjustable settings to cater to different grain sizes and types, ensuring optimal cleaning performance.

Capacity: Available in different sizes and capacities to suit the needs of small-scale farms as well as large commercial grain processing facilities.

Durability: Constructed with robust materials to withstand the rigors of continuous operation and to provide a long service life.

Scope of application


Pre-cleaning: Used at the initial stage of grain processing to remove impurities that could damage equipment in later stages.

Quality Control: Ensures that only clean grain proceeds to milling, packaging, or storage, thus maintaining product quality.

Storage Preparation: Reduces the risk of spoilage during storage by removing materials that may contribute to pest infestation or mold growth.

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