... of industries, like steel annealing and nonferrous smelting industries, metallurgy and chemistry fields, and building industries, and more.A rotary kiln, which ... it is mainly used for roasting chrome ores, and chrome powders, and more.3. Lime kiln is applied to roast ... precision plunger metering pump, high accuracy speed control valve and contact graphite block sealing device, etc.2. In order to ...