The hazardous conditions of underground and open-cut mining call for rugged material-handling equipment that is built to endure moisture, corrosion, abrasive dust and ignitable fumes. At Dongqi, we understand the challenges of mining and the problems caused by equipment downtime. So we design and manufacture mining cranes and other material-handling equipment that are equipped to handle the task. We also back the superior design and quality of our equipment with industry-leading service.

Crane Equipment for Mining Industry

The main types of cranes used in the mining industry include mining cranes and coal mine wellhead cranes.

Mining cranes are widely used in mining sites, mainly for lifting and transporting ores, slag, and other building materials. Common types of mining cranes include bridge cranes, gantry cranes, etc.

The coal mine wellhead crane is mainly used for important links in the coal mine production process, including the transportation and lifting of wellhead equipment, materials, and personnel. In coal mine production, commonly used types of wellhead cranes include winches, hoists, etc

Choosing a suitable crane for a mining site requires consideration of multiple factors, including load capacity, span and height, movement speed, operation mode, safety, maintenance, economy, and manufacturer reputation. By considering these factors comprehensively, it is possible to purchase cranes that meet the actual needs of the mine, thereby improving the work efficiency and safety of the mine.

For example, we once installed a fully automatic crane for a platinum mine. This crane is a double beam electric bridge grab crane with a lifting capacity of 16 tons and a span of 16 meters. It uses a customer specified mechanical rope grab instead of a hydraulic alternative solution, aiming to improve the durability of mechanical operations in abrasive operating environments.

Expertise

A host of Smart Features can be added to your overhead crane to give you more control over material handling in your production process.

Sway Control is designed to automatically limit load swing by controlling the bridge and trolley acceleration and deceleration rates.

Shock Load Prevention allows for smooth load control. If an attempt is made to pick up a load too abruptly, hoisting speed is automatically and immediately adjusted.

Protected Areas are no-go areas, which the crane operator cannot override or adjust.

Customer Reference Story

Overhead cranes for Botswana diamond mine

There are two underground overhead cranes in Botswana Diamond Mine.

The first crane will be a 15-ton suspension crane. It will feature two I-beams bolted to rock-bolt flanges anchored in the roof of a mine chamber following blasting, excavation and preparation to create a service workshop. Usually, the I-beams would be the topmost side components of a fixed gantry constructed from the ground up.

The wheeled 11m span crane girders will then run suspended from the lower flanges of these two long-travel I-beams, with the crane’s crab mounted atop the girders to provide the cross-travel. The whole structure of the crane becomes suspended, running along and across the roof of the chamber.

We designed this crane to specifications supplied by the project’s consulting engineers. Suspending the crane will deliver the greatest possible lifting height, reducing the volume of rock needing to be blasted and excavated to form the chamber. After installation, the crane will have a lifting height of 9m.

The second crane will be a conventional overhead design, with a 35-ton capacity, 9.2m span and a lifting height of 12.7m. It will work in a larger, existing chamber.

The cranes will be used for service and maintenance applications, the suspension crane being installed in a chamber close to the ore body, where it will work on machinery used for drilling, blasting and ore removal. Such a location will save the time and cost of moving the machines over a greater distance to workshops closer to the shaft.

We have extensive experience in manufacturing mining cranes

In the manufacturing process of bridge cranes, we can develop a reasonable quality inspection plan based on the provided information. This plan aims to ensure that every step of the manufacturing process is effectively monitored to ensure the quality and safety of the final product.

• Layout check: It is very important to conduct layout check in the initial stage of manufacturing to ensure the correct position and size of each component. This step can detect and correct any design or positioning errors early on.
• Magnetic particle and ultrasonic inspection: These non-destructive inspection methods can be used to detect cracks or defects inside materials. These inspections should be carried out immediately after the critical welding and assembly stages.
• X-ray examination: X-ray examination can further confirm the integrity and internal structure of components. It is particularly suitable for detecting hidden parts or thick walled components that are difficult to detect through conventional methods.
• Assembly inspection: After completing the main assembly, an assembly inspection should be carried out to ensure that all components are correctly installed and meet the predetermined safety and functional requirements.
• Inspection before sandblasting and painting: Before sandblasting and painting, a detailed inspection of the surface should be carried out to ensure that there are no oil stains, rust, or other impurities. This can ensure good adhesion between the coating and the substrate and the final appearance.
• Dry film thickness inspection: Finally, perform a dry film thickness inspection on the crane that has completed the painting to ensure that the coating thickness meets the specifications, thereby ensuring anti-corrosion and appearance effects.

Through the above quality inspection plan, we can ensure that the bridge crane undergoes strict monitoring throughout the entire manufacturing process, providing customers with high-quality products that meet specifications and quality control requirements.