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ROTARY RICE GRADER
ROTARY RICE GRADER ROTARY RICE GRADER

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Rotary Rice Grader Rice Mill Equipment

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The Rotary Rice Grader Rice Mill Equipment stands as a cornerstone in modern rice processing lines, engineered to deliver precise classification of milled rice based on grain size, shape, and quality. This advanced sorting machinery bridges the gap between polishing and packaging stages, ensuring only uniform grains reach market channels while maximizing value recovery from broken kernels. With an enhanced processing capacity ranging from 3 to 10 tons per hour across its model range, it accommodates diverse production scales from medium-sized specialty mills to large industrial rice processing complexes.

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Model

MMJX100*3

Capacity(t/h)

2-3

Power(kw)

1.1

Weight(kg)

920

Dimension(mm)

1760*1520*1480


Product Overview


What distinguishes this grader from conventional models is its seamless integration with rice mill workflows, featuring a space-efficient design that requires 30% less installation space than comparable systems. The rotating cylindrical sieve structure eliminates static screening limitations, achieving an exceptional sorting accuracy of 99.6% across various rice varieties—from short-grain japonica to long-grain basmati. This precision directly translates to consistent product quality, reduced waste, and improved marketability of finished rice products.


Product Features


Multi-Layer Sieve Cylinder Configuration

Equipped with 2 to 4 concentric rotating sieve cylinders (depending on model), each featuring precision-drilled apertures ranging from 1.8-3.2mm, the grader performs multiple separation stages in a single pass. The outer cylinder removes large impurities, intermediate cylinders separate different grain sizes, and the inner cylinder collects fines and broken particles, ensuring comprehensive classification in one continuous process.


Intelligent Speed Regulation

A 7.5 kW variable frequency drive system enables precise rotation speed adjustment between 35-65 rpm, with fine-tuning capabilities of ±2 rpm for optimal separation of specific rice varieties. This flexibility allows operators to achieve perfect grading results for everything from small-grain aromatic rice to larger, longer grains that require gentler handling.


Enhanced Self-Cleaning Mechanism

Combining traditional bouncing ball technology with an integrated air purge system, this grader reduces manual cleaning requirements by 85% compared to standard rotary graders. The dual-action cleaning prevents grain buildup on sieve surfaces, maintaining consistent throughput even during extended processing runs and reducing unscheduled downtime.


Automated Impurity Diversion

An intelligent diversion system with precision sensors automatically channels different grain fractions to designated outlets, with real-time monitoring that ensures less than 0.5% cross-contamination between grades. This automation minimizes operator intervention while maximizing the value recovery from each batch.


Product Applications


Integrated Rice Milling Lines

As a critical component in modern rice processing facilities, the grader fits seamlessly between polishing and packaging stages, ensuring only uniformly sized whole grains proceed to premium markets while directing broken grains to secondary processing streams for flour production or food ingredient applications.


Specialty Rice Processing

For producers of high-value rice varieties such as Basmati, Jasmine, and organic rice, the grader's precise separation capabilities preserve the unique characteristics that command premium market prices. Its gentle handling maintains grain integrity, critical for specialty varieties where visual appeal directly impacts market value.


Export Quality Assurance

Meeting stringent international rice quality standards requires consistent grain sizing and purity. This grader removes off-spec grains and impurities that could result in customs rejection, supporting export-oriented mills in maintaining compliance with global market requirements.


FAQ


How frequently should sieve cylinders be replaced?

Under normal operating conditions (8-hour daily use), sieve cylinders typically maintain optimal performance for 8-10 months with standard rice varieties. For abrasive varieties or continuous 24-hour operation, replacement every 6-7 months is recommended. The quick-release mechanism allows complete cylinder replacement in less than 45 minutes without specialized tools.

Can the grader accommodate different rice grain lengths?

Yes, the grader's versatility extends to all rice types through interchangeable sieve cylinders with specialized aperture configurations. Short-grain varieties perform best with 1.8-2.2mm apertures, medium-grain rice uses 2.2-2.6mm apertures, and long-grain varieties utilize 2.6-3.2mm apertures. Five preset configurations are stored in the control system for immediate recall.

How is grading accuracy calibrated and maintained?

The grader features a built-in calibration program that operators can run in 15 minutes to verify and adjust separation accuracy. Real-time monitoring continuously checks efficiency, alerting operators if accuracy drops below 98%. Calibration kits with standard reference grains are available to ensure consistent results across different production shifts.


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