Maily are used to pump high-hardness, strong-corrosion and high-concentration liquids that contain suspended solid particles, such as finished ores, refuse ores, ashes, cinders, cements, mud, mineral stones and etc. in the industries of metallurgy, mining, coal, power, building material and etc. The temperature of the pumped solid-liquid mixture should be ≤80 °C, and the weight concentration should be ≤60%.