Tin Ore

In rock tin ore beneficiation, cassiterite is brittle. The crushing stage must achieve sufficient liberation while avoiding over-grinding—once cassiterite is over-ground, gravity recovery drops significantly. Huashengming Heavy Industry offers a three-stage crushing process solution: primary crushing with a jaw crusher, and secondary and tertiary crushing with double roll crushers, reducing 500mm run-of-mine ore to below 5mm in a single pass, precisely meeting the feed size requirements for subsequent beneficiation.

I. Industry Pain Points in Rock Tin Ore Crushing

Traditional hammer crushers, despite their high crushing ratio, easily cause over-grinding of brittle minerals like cassiterite, leading to:

Reduced gravity recovery

Increased grinding energy consumption

Tin Ore

Greater tailings losses

II. Three-Stage Crushing Process

Stage 1: Primary Crushing (Jaw Crusher)

Run-of-mine ore (≤500mm) is fed via a vibrating feeder into a jaw crusher, crushed to 30-80mm.

Stage 2: Secondary Crushing (Spring/Hydraulic Double Roll Crusher)

The primary crushed material enters a double roll crusher for secondary crushing, further reducing it to 10-20mm.

Stage 3: Tertiary Crushing (Fully Hydraulic Double Roll Crusher)

The secondary crushed material enters a tertiary double roll crusher, where the roll gap is precisely adjusted to crush the material to below 5mm, directly meeting the feed requirements for gravity separation equipment such as jigs and shaking tables.

The complete production line consists of: Vibrating Feeder + Jaw Crusher + Spring/Hydraulic Double Roll Crusher + Fully Hydraulic Double Roll Crusher + Vibrating Screen, forming a closed-circuit system.

III. Core Advantages of the Double Roll Crusher

1. Extremely Low Over-crushing Rate

The double roll crusher uses “wear-resistant double-roll squeezing” instead of “violent impact.” The material is uniformly crushed between the rolls. Compared with hammer crushers, the double roll crusher produces significantly less fine powder—exactly the crushing method needed for cassiterite beneficiation.

2. Precise and Adjustable Discharge Size

By adjusting the roll gap, the discharge size can be freely adjusted within the range of 1-10mm. Fully hydraulic models come standard with a PLC intelligent control system that automatically adjusts the roll gap and monitors load.

3. Long Roll Shell Service Life and Low Maintenance Costs

Tin Ore Crushing Site

High-chromium manganese steel wear-resistant roll shells have an average service life of over 2 years, eliminating the need for frequent wear parts replacement.

4. Capable of Crushing Both Dry and Wet Materials, Stable Operation

No strict requirement for material moisture; non-clogging and non-sticking. The equipment operates with low vibration and noise, and the sealed design improves the working environment.

IV. Practical Application Case: DRC Rock Tin Ore

A rock tin ore mine in the Democratic Republic of Congo adopts Huashengming’s three-stage crushing process:

Equipment Configuration: 1149 vibrating feeder + 750×1060 jaw crusher + 300×1300 fine jaw crushers (2 units) + fully hydraulic 1200×1000 double roll crushers (2 units) + 2460 vibrating screen

Feed Material: Rock tin ore, 500mm feed size

Final Product: Below 5mm, directly fed to gravity separation

The production line has been operating stably since commissioning, with an over-crushing rate significantly lower than traditional solutions, earning high recognition from the customer.

The profitability of rock tin ore beneficiation begins with precise control in the crushing stage. Huashengming’s double roll crusher, with its “squeezing instead of impact” crushing concept and precisely controllable discharge size, maximizes liberation while minimizing over-grinding, providing a solid foundation for subsequent gravity recovery. For more information or to request a customised solution, please visit the official Huashengming website or contact the sales team.

Gongyi Huashengming Heavy Machinery Factory

Gongyi Huashengming Heavy Industry Machinery Factory is a production of crushing and screening equipment, production, sales as one of the large machinery intelligent manufacturing enterprises. Company headquarters is located in the Central Plains of the pearl Gongyi City, the main roller crusher equipment, mobile sand making equipment, screening equipment and construction waste treatment equipment series products, our company’s production site thousands of thousands, all over the provinces and cities. Over the years we have been consistent, honest service to every customer. We sincerely look forward to cooperating with you.