6 by the process step of: leaching the ore with a reducing bismuth; bismuth sponge iron powder cementation; oxidized regenerated ferric chlorine; Bismuth Bismuth rough casting; Fire refining crude bismuth; bismuth leaching residue valuable metals Mineral recovery. The main reactions of the leaching process are as follows: The leachate is reduced by adding the antimony ore to reduce the residual ferric iron in the solution to divalent. Iron powder is added to precipitate a sponge crucible, which is oxidized by chlorine gas to regenerate ferric iron. This method is relatively mature in process, and the leaching rate of bismuth is high (98%-99.8% of slag meter), comprehensive utilization is good, and pollution is small, which provides an effective way to improve the comprehensive utilization of sputum resources. However, the consumption of this process material is relatively high, and the 1 t sponge is consumed by industrial hydrochloric acid 1.5 to 1.8 t, oxygen 0.4 to 0.5 t, and iron powder 0.5 to 0.6 t. Due to the use of iron powder replacement and chlorine regeneration technology, the accumulation of iron and chloride ions in the solution can not be ignored, the discharge of waste liquid is large, the concentration of ions in the leachate is relatively high, the viscosity is large, and the filtration and washing of the slag is difficult. The process flow is shown in Figure 1. Figure 1 bismuth ferric chloride leaching of tin ore - iron replacement mentioning the bismuth process flow diagram Combined Rice Milling Machine,Mini Rice Mill Machine,Portable Rice Milling Machine,Automatic Rice Mill Machine HUNAN JINSONG MACHINERY CO., LTD , https://www.sheller.nl