Introduction
The corundum slurry pump was developed to address the challenges of harsh working conditions in hydrometallurgical ore processing, where conventional metal pumps made from high-chromium cast iron or duplex stainless steel suffer from poor corrosion and wear resistance. These pumps face rapid impeller wear, reduced efficiency, and short lifespans when conveying corrosive media with solid particles. In response, we designed a highly efficient, energy-saving, and wear-resistant diamond-lined corundum slurry pump. This innovative product is widely used in industries such as metallurgy, mining, electric power, and chemicals, delivering excellent cost-effectiveness and strong market performance.
Corundum
Corundum is a crystalline form of aluminum oxide (Al₂O₃) and one of the hardest natural minerals, second only to diamond. It occurs naturally as precious gemstones such as ruby and sapphire, but in industrial applications, it is synthetically produced for its remarkable hardness, durability, and chemical resistance.
- Extreme Hardness: With a Mohs hardness of 9 (just below diamond, which is 10), corundum is highly resistant to wear and abrasion.
- High Melting Point: Corundum has a very high melting point of about 2,050°C, making it ideal for use in high-temperature environments.
- Chemical Stability: It is chemically inert, meaning it resists corrosion from most acids, alkalis, and other corrosive substances.
- Low Thermal Expansion: Corundum has excellent thermal stability, with minimal expansion when exposed to heat, contributing to its use in various high-temperature industrial processes.
Technical Background
The newly developed wear-resistant corundum-lined slurry pump uses AL2O3 as the main material and is baked at 1,700°C, giving it HRA80-90 hardness, second only to diamond. It surpasses high-chromium cast iron in wear resistance and stainless steel in acid resistance. The pump’s body is ceramic-lined with a stainless steel exterior, making it durable, safe, and easy to maintain.
Its wear resistance is 266 times better than manganese steel and 171.5 times higher than high-chromium cast iron, extending its service life by at least five times. This results in lower material consumption, reduced maintenance costs, and increased productivity with significant economic benefits.
The corundum-lined slurry pump offers several advantages:
- Higher efficiency: The precise manufacturing process reduces hydraulic losses, and the smoother ceramic surface improves efficiency by 3%.
- Smoother operation: Corundum’s lighter weight (1/3 of metal) results in a more stable pump operation with less shaft disturbance.
- Advanced structure: The corundum lining prevents direct contact between metal and media, enhancing both wear resistance and the overall strength and stability of the pump.
Wear Resistance and Corrosion Resistance
In the field of domestic special industrial pump applications, the working conditions are mostly dominated by highly corrosive and highly abrasive media, and the use environment is harsh. This requires the pump material to have good corrosion resistance and abrasion resistance, and corundum material will be a good choice. an excellent choice.
Corundum also has good chemical stability. It can resist corrosion from almost all inorganic acids, organic acids, and alkalis, and has excellent oxidation resistance.
Application Fields of Corundum
Application Industries | Product Equipment |
Coal-fired power generation | Desulfurization circulation pump, Gypsum discharge pump, Limestone slurry recirculation pump, Mill recirculation pump, Emergency pump |
Grinding & Ore dressing | Grinding mill cyclone feed pump, Tailings conveying pump, Flotation pump, Concentrate pump, Thickener underflow pump |
Steelmaking & Ironmaking | Slurry pump for blast furnace slag water, Sintering machine wet, Ammonia desulfurization pump |
Chemical industry | Salt chemical, Alkali chemical, Phosphorus chemical and other highly corrosive process pumps |
Fluid Dynamics Analysis Simulation Diagram
Corundum Pumps Series
According to the material characteristics, the corundum ceramic wear-resistant and corrosion-resistant pumps developed and produced by our company are divided into four categories: heavy-duty slurry pumps, light-duty slurry pumps, submersible slurry pumps and submersible slurry pumps. The products involve multiple pump series products such as DVCY, SVCY, LCY, MCY, etc.
Contact Us
The newly developed wear-resistant corundum-lined slurry pump offers a breakthrough solution for industries handling highly abrasive and corrosive media. With its exceptional hardness, second only to diamond, and superior wear and corrosion resistance, it significantly outperforms traditional pumps made of high-chromium cast iron or stainless steel. The innovative combination of corundum lining and stainless steel armor ensures durability, safety, and ease of maintenance, resulting in a longer service life and reduced operational costs.
This product not only enhances efficiency and productivity but also delivers substantial economic benefits through reduced material consumption and maintenance needs. Its robust performance in harsh environments makes it a reliable and cost-effective choice for industries such as mining, metallurgy, power generation, and chemical processing.
