Stone coal rotary kiln roasting process: The current process of extracting vanadium from stone coal is generally characterized by low and unstable vanadium conversion. Multi-factor rotary kiln roasting conditions were tested on different types of ore. The effect of the addition of additives on the conversion rate of vanadium roasting was investigated. The results show that the ore is calcined in a rotary kiln at 800 °C for 2 h, and then leached with a 4 g/L sulfuric acid solution at a liquid solid mass ratio of 3:1. The vanadium leaching rate is up to 85%, and continuous operation can be achieved. The centralized treatment of flue gas has changed the situation that the flat kiln roasting cannot be continuously operated and the flue gas disorderly discharge is difficult to handle, which is very favorable to the environment. The basic function of the Solder Preform Feeder is to flatten the solder thin or wire and produce solder plates. The use of the solder plate is to add thickness to some components that requires more solder content. The purpose of the feeder is to lessen the cost by taking out costings on component reels or other solutions that is currently implemented in SMT production process. KDW Solder Preform Feeder can be customized to any SMT Mounter brand and models. Currently, the Solder Preform Feeder is now available and passed machine compatibility test for SMT machine brands such as Juki, Samsung, Fuji, Yamaha, Panasonic, and Siemens. Solder Preform Feeder SMT Solder Preform Feeder, Solder Plate Feeder, Solder Preform Feeder, Automatic Solder Preform Feeder ShenZhen KDW Electronics Co.,Ltd , https://www.smtsplicetape.com
Stone coal rotary kiln roasting process