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
Use and performance of Graphite electrodes
use
Used in steelmaking electric arc furnace, refining furnace, as conductive electrode; Used for industrial silicon furnace, phosphorus furnace and corundum furnace, as conductive electrode.
performance
High resistance to thermal shock and high mechanical strength
grade
High power Graphite Electrode (SHP) high power graphite electrode (UHP) with high power graphite electrode (HP) with high power graphite electrode (R
Precautions for use of graphite electrodes
1. According to the capacity of the electric furnace and the load of transformer, the grade and diameter of the electrode are suitable
2. When loading the electric furnace, the bulk charge shall be placed in the bottom of the furnace so as not to break the electrode. In the process of smelting, the lime should not be conductive. Large masses of objects are concentrated directly below the electrode, otherwise it will affect the electrode and even cause the electrode to break.
3. Attention should be paid to the position of the furnace cover. If the furnace cover is offset, the cover of the furnace will be blown on the lifting electrode, causing the electrode to be damaged.
4. When connecting the electrode, if the defect of joint bolt is found, the connection should be made after replacement
5. After the electrodes are connected, if there is a gap in the connection surface, it is important to find out the reason
6. The electrode should be used vertically.
7. The electrode holder shall be sandwiched between the upper and lower levels of the top electrode, and shall not be sandwiched between the warning line and the middle electrode. Otherwise, the electrode column is easily broken
8. The raw materials and production techniques of different manufacturers may vary. The physical and chemical properties of the electrode are also different, and it is recommended that the joints and electrodes produced by different manufacturers should not be used in a different way.
High Power Graphite Electrode,Die-Cast Graphite Electrodes,Bone Bit Graphite Electrod,Thermal Graphite Fengcheng Ruixing Carbon Products Co., Ltd , https://www.lnfcrxts.com