Application scenarios in the mining industry and solutions for vertical long axis semi submersible turbine pumps

Application scenarios in the mining industry and solutions for vertical long axis semi submersible turbine pumps

The vertical long axis semi submersible turbine pump has the ability to adapt to multiple scenarios in the mining industry, and has outstanding application advantages. It has rich application scenarios in the mining industry and has many successful typical cases.
Application scenarios in the mining industry
Mine underground drainage
It is the core application scenario of vertical long axis semi submersible turbine pump, which can be used in the central pump room underground to concentrate and discharge the mine water containing rock powder and coal slurry that flows in during the mining process to the ground; Local drainage can also be carried out in the mining area to pump out temporary water accumulation pits and low-lying areas of tunnels. Its impeller can be submerged below the lowest water level in the water tank, completely eliminating cavitation and ensuring the drainage safety of large water mines.
Open pit mine dewatering and drainage
Install dewatering wells on the slopes or bottoms of open-pit coal mines and metal mines to extract groundwater and maintain slope stability and dry mining areas; It can also be used for rapid drainage of large foundation pits in mining construction projects. Vertical long axis semi submersible turbine pumps are often installed in a submerged manner, with only the outlet pipe exposed to the ground.
Process water supply for beneficiation and coal washing plant
Provide circulating water containing fine coal slurry for heavy medium cyclones and jigs in coal washing plants; At the beneficiation plant, the slurry feed containing 30% -50% solids (particle diameter ≤ 5mm) is transported to the ball mill and flotation machine, and the tailings slurry can also be sent to the tailings pond (usually with a head of 30-80 meters). This type of scenario requires the overcurrent components to be made of wear-resistant high chromium cast iron (Cr26 or above) or wear-resistant alloy steel, and the impeller to be semi open or fully open to prevent blockage.
Mine fire protection and sprinkler dust reduction
Water can be taken from the fire water pool or reservoir to supply underground fire hydrants or automatic sprinkler systems; It can also supply water for the high-pressure spray system of the shearer and roadheader (it needs to be equipped with a pressure pump, and the long shaft pump is only used for water supply). In this scenario, the motor must be of mining explosion-proof type (Ex d I Mb), and all exposed components must not be made of copper to prevent sparks from impact.
Groundwater Control and Prevention Water Engineering
Provide pressure water for ground pre grouting and underground grouting water blocking projects; Quickly extract and drain water inrush points and collapse column areas to ensure safe production in the mine.
Drainage of auxiliary facilities in mines
Extracting acidic rainwater from coal gangue piles requires resistance to weak acidic corrosion; Extracting coal containing wastewater from coal piles and treating it for reuse.
 
Targeted solutions
Depth and flow adaptation: The vertical long axis semi submersible turbine pump lifting pipe adopts a modular multi section design, which can flexibly increase or decrease the length according to the depth of the mine fluid. It is generally suitable for depths of 3-20 meters, and special models can support a maximum depth of 400 meters underwater, meeting the drainage needs of mines at different depths; The flow range covers 80-13000m ³/h, which is suitable for small mine drainage and can also meet the high flow water intake needs of large open-pit mines.
Impurity protection design: Install a filter with a suitable aperture at the pump inlet to block large particles of impurities from entering the pump chamber, which not only avoids damaging the impeller but also does not excessively increase inlet losses and affect efficiency; The rotor adopts a withdrawable design, which can be removed for maintenance without disassembling the pump body during maintenance, greatly reducing the downtime for underground maintenance.
Corrosion and Wear Protection: For acidic mine water and high sediment water quality, the core components are made of wear-resistant materials, combined with an external cooling and lubrication system, which can adapt to the transportation of media with high sediment content and strong corrosiveness, reduce maintenance frequency, and extend equipment service life.
Application advantages
Efficient and energy-saving
Under high head conditions, vertical long shaft semi submersible turbine pumps have more energy efficiency advantages than horizontal pumps, can reduce long-term operating costs, and are suitable for high flow and high head operational needs such as mine drainage and process water supply.
Strong adaptability to media
It can handle complex media such as mine water and slurry containing abrasive particles and weak corrosiveness. The core components of the vertical long shaft semi submersible turbine pump can be made of wear-resistant high chromium cast iron, super duplex steel material, and wear-resistant coating. The guide bearing is externally connected with cooling and lubricating water to effectively resist wear and corrosion and ensure stable operation of the equipment.
Good structural adaptability
Adopting a vertical suction inlet and horizontal outlet design, single foundation installation, direct motor drive, small foundation footprint, suitable for working environments with limited mining space; The number of lifting pipes can be adjusted according to the depth of the liquid, and can flexibly adapt to the drainage needs of different depths.
Convenient operation and maintenance
The rotor of the vertical long shaft semi submersible turbine pump adopts a withdrawable design, combined with an external cooling and lubrication system, which can greatly shorten the on-site maintenance time; Some models are equipped with intelligent control cabinets that can automatically start and stop, overload alarm, and remote monitoring based on liquid level, achieving efficient unmanned operation and maintenance.
Typical application cases
PT Adaro Tanjung Mining Project in Indonesia
This project is a large-scale mining project in Indonesia, which uses a vertical long shaft semi submersible turbine pump. The pump has multiple installation options such as upper outlet, lower outlet, and double base type. The suspension height can reach 25 meters, and a hollow shaft design can also be used; The imported diameter is large, the hydraulic loss is small, and the single arc design is matched with two internal pre swirl ribs, which improves the suction efficiency and operational stability of the pump; The guide vane body adopts a combination welding structure, which can improve the efficiency of the water pump by 1-2% compared to the traditional integral casting structure. The closed impeller reduces volume loss and installation difficulty. The sand discharge hole on the side of the hub body can also avoid impeller sedimentation, ensuring the stable operation of the mine drainage system.
Large scale coal mine drainage system renovation in China
In the renovation of the drainage system in the central pump room of a ten million ton coal mine, multiple large flow and high head mining vertical long shaft semi submersible turbine pumps were selected, with a single pump flow rate of 2000-3000m ³/h and a head of 150-200m. The core components of the vertical long shaft semi submersible turbine pump are made of wear-resistant high chromium cast iron material, matched with water lubricated rubber guide bearings, effectively resisting the wear of rock powder and coal slurry in the mine water. At the same time, an intelligent monitoring system is equipped to monitor bearing temperature, lubricating water pressure, liquid level and other parameters in real time, achieving efficient unmanned operation and maintenance, reducing drainage failure downtime by more than 30% every year, and ensuring the safety production of the mine.