Double Roller Crusher for Gold Ore

At a medium-sized open-pit gold mine, after the ore was coarsely crushed by a jaw crusher, a hammer crusher was originally used for fine crushing. However, the hammer crusher generated significant impact force, resulting in a large amount of fine ore (excessively high content of -200 mesh material). During heap leaching, the ore pile exhibited extremely poor permeability; the cyanide solution could not penetrate uniformly, and channeling even occurred. The leaching recovery rate was only about 60%.

After adjustments, a double-roll crusher was introduced to replace the hammer crusher as the secondary crushing stage, with the roll gap set to 10–15 mm. The compression principle of the double-roll crusher produces flake- and strip-shaped particles. Although the particle size is small, there is very little fine ore. The porosity of the ore pile has significantly improved, and permeability has been restored. The cyanide solution can flow uniformly through the ore pile, increasing the leaching rate to over 75% while avoiding the risk of ore pile caking.

double roller crusher for gold ore

The Role of Double-Roll Crushers in Gold Mining Production Lines

Medium and Fine Crushing Operations
Double-roll crushers are typically used for secondary or tertiary crushing following a jaw crusher, further reducing medium-sized gold ore to a smaller particle size (generally 1–20 mm) to provide material of a suitable size for subsequent grinding or beneficiation operations.

Controlling Product Particle Size
By adjusting the gap between the rollers, the double-roll crusher can control the output particle size with high precision, reducing the production of coarse and excessively fine particles and resulting in a more uniform product particle size.

Reducing Over-crushing
Gold ores often contain brittle gangue minerals; excessive crushing can produce large amounts of fine powder, which adversely affects the performance of subsequent processes such as gravity separation and flotation. The double-roll crusher primarily uses a compression crushing mechanism, resulting in a relatively low rate of over-crushing.

Reducing Costs and Improving Efficiency in Grinding Operations
The ore pre-crushed by a double-roll crusher has a fine and uniform particle size, which can significantly reduce the feed size for ball mills or semi-autogenous mills, lower energy and steel consumption during grinding, and improve grinding efficiency.

Double-Roll Crushers in Gold Mining Production Lines

Advantages of Double-Roll Crushers in Gold Mining Production Lines

The product has a uniform particle size with minimal over-grinding.
The double-roll crusher uses a double-roll compression crushing mechanism, in which the material is subjected to uniform pressure between the roll surfaces. This results in a relatively uniform particle size after crushing and a low fine-powder content, which helps improve the recovery rate in gold ore beneficiation.

Moderate crushing ratio with high adjustability
The roller gap is adjustable, with a crushing ratio typically ranging from 3 to 10. The output particle size can be flexibly adjusted according to process requirements to meet the crushing needs of different stages.

Good adaptability to ore containing water or clay
Double-roll crushers are less prone to clogging when processing ore containing a certain amount of moisture or clay, and are more adaptable than some impact crushers.

Low Energy Consumption and Low Operating Costs
Compared to hammer crushers, impact crushers, and other types, double-roll crushers operate at lower speeds and consume less energy. Additionally, their wear parts (roll liners) have a relatively long service life, resulting in lower maintenance costs.

Customer Feedback

“We tried several equipment options before—clogging, rapid wear, poor product quality, constant issues. After switching to the Hua Sheng Ming hydraulic roll crusher, all the problems were resolved. The equipment runs stably, the product quality is good, maintenance is hassle-free”

Case Summary

In gold mining operations, the core value of double-roll crushers lies in two aspects: “particle size control” and “gold preservation”:

Particle Size Control: Provides good permeability for heap leaching or supplies ultra-fine feed to ball mills (more crushing, less grinding).

Gold Preservation: Utilizes the principle of pure compression to reduce over-grinding, preserve the morphology of coarse gold particles, and facilitate early recovery in subsequent gravity separation processes.

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.