• High-profile mining machine manufacturing brand

    Since 1987, CoJJ Group has continuously obtained more than 100 patents and authorizations for crushers and mills. The crusher and mill equipment developed by RJJ Group are exported to more than 160 countries and regions around the world. Recognition and trust.

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  • Service guarantee

    Our service commitment is not a slogan, an idea or an advertisement, and our service commitment is serious. To this end, we have built a large, systematic and standardized service guarantee system to ensure that each link is implemented in place and processed in detail.

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Hot Products

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CS Cone Crusher

Comparing with other kinds of crushers, CS Series spring cone crusher is quite excellent in hard material crushing…

LUM Ultrafine Vertical Roller Mill

LUM Series Ultrafine Vertical Roller Mill adopts CoJJ abundant experience in producing vertical grinding mill and…

SCM Ultrafine Mill

For almost 30 years, CoJJ has being specializing in all facets of grinding mill design and maintenance. SCM series…