Key Points

In this decisive year of the three-year action plan, Northern Heavy Industries Group Co., Ltd. (NHI) has hit the ground running. The company has been achieving frequent successes in production and operations, maintaining strong momentum in its development:

The domestically produced first 5.5-meter rolling divided shear, independently developed by NHI, has successfully completed commissioning within the factory and is about to be shipped to the customer’s construction site. This achievement marks another significant technological breakthrough for NHI, following the successful development of the 5.5-meter rolling crop shear.

NHI has signed an order for three MLL3000 spiral vertical mills with a vanadium-titanium magnetite mine user in Xinjiang. Additionally, NHI has secured a cooperation agreement with an overseas mining customer, signing orders for one ultra-large semi-autogenous mill and one ball mill. The contract value is nearly 100 million RMB. This marks a new market breakthrough for NHI in the field of large-scale mining mills.

With continuous breakthroughs and a pioneering spirit, NHI has maintained double-digit growth in new orders in January. Currently, the company has a full production schedule, and employees are highly motivated and confident in achieving a successful start to the year.

Inherit the Spirit of Craftsmanship and Create Top-tier Products

The 5.5-meter rolling divided shear is a high-end piece of equipment in the steel metallurgy industry, with demanding design requirements and significant manufacturing challenges. “The design of this product has very high standards for the curvature of the rolling shear blades, requiring a combination of advanced computational capabilities and extensive manufacturing experience. Moreover, with over ten thousand components, this product demands extremely high precision in both machining and assembly. We faced many new challenges.” said Yang Yuwei, Director of the Metallurgical and Power Equipment Design Institute and Chief Engineer of NHI’s Design Research Institute.

Among the many challenges, maintaining a high degree of fit between the eccentric shaft and the bearing shell is crucial for the product’s efficient operation. “Although the machining accuracy of the eccentric shaft and bearing shell we produce is already very high, it is still difficult to meet the requirement for uniform contact between them. If the contact area is too large, this can result in an increased friction coefficient and generate thermal stress, which adversely affects the product’s performance. Conversely, if the contact area is too small, it can lead to wear and damage of the eccentric shaft or bearing bushing, thereby shortening their lifespan,” explained Yu Dong, Director of the Assembly Workshop at NHI’s General Assembly Branch Factory.

To tackle this issue, NHI’s employees carried the spirit of craftsmanship and relied on their extensive experience and exceptional skills to manually scrape and fit the bearing bushings. This process is extremely demanding and tests the technical proficiency of the workers. As the saying goes, “To forge iron, one must be strong oneself.” It is their solid foundational skills honed through daily practice that give them the confidence to handle such high-precision products and complete tasks to the highest standards.

Technological innovation empowers high-quality development

It is reported that the three MLL3000 spiral vertical mills signed between NHI and a vanadium titanium magnetite customer in Xinjiang are currently the largest specifications of spiral vertical mills in China, once again demonstrating NHI’s leading position in the research and manufacturing of spiral vertical mills.

With the continuous new breakthroughs of product upgrade and technological innovation, the spiral vertical mills produced by NHI have continuously improved in key performance indicators such as material lifting capacity, grinding efficiency, product fineness, and the service life of spiral liners. These enhancements have endowed the product with significant technological and market advantages.

The new-generation MLL3000 spiral vertical mill incorporates advanced design and manufacturing technologies. With a lightweight design concept, it achieves lower energy consumption, higher efficiency, and easier maintenance. The mill offers several advantages, including strong material lifting capacity, high grinding efficiency, fine product granularity, long service life of spiral liners, and the ability to start under load and full load. Compared to traditional equipment, it can save 30% to 50% in energy. The successful development of this product further propels technological advancement and industrial upgrading in China’s mining equipment sector. It also injects new momentum into NHI’s continuous efforts towards innovation and sustainable development.

Deepening Project Engagement and Expanding Markets through Multiple Channels

NHI’s product technologies, honed in the domestic market, have gained significant favor in the international market. In 2024, NHI exported a Ф7.9×4.8m semi-autogenous mill and a Ф6.4×9.7m ball mill to Eritrea, providing strong support for the steady progress of the largest joint venture project between China and Eritrea. At the beginning of 2025, NHI successfully won the bid for its largest-ever semi-autogenous mill and ball mill project in recent years. This achievement marks another significant milestone in the company’s efforts to deepen its projects and expand its international market presence comprehensively.

n recent years, NHI has actively participated in international equipment exhibitions, signing cooperation agreements with renowned companies from multiple countries. These efforts aim to provide support for jointly developing key cooperative regional projects. NHI has achieved strong partnerships through industry complementarity, country complementarity, and project complementarity, promoting mutual benefit, win-win outcomes, and common development.

The series of remarkable achievements obtained by NHI in recent years strongly supports its business strategy of driving high-quality development through technological innovation. It is a testament to the company’s steadfast commitment to the development philosophy of “user-centricity and market-orientation.” These accomplishments demonstrate NHI’s continuous efforts in developing new products and exploring new markets, which have enabled it to stand out in the fiercely competitive market.

The decisive battle of the three-year action plan has begun. The head of NHI stated that the company will spare no effort to ensure that key projects and products are delivered on schedule. At the same time, NHI will accelerate joint ventures and cooperation efforts to expand its business scale, contributing to the successful conclusion of the three-year action plan for the comprehensive revitalization of Liaoning.