HOT2 Russian Direct Metal Smelting Equipment

Product Specification

  Russian direct metal smelting equipment

  Equipment use:

  For refractory precious metal tailings or slag, the recovery rate of traditional cyanide gold extraction method is often lower than 80%, so it must be pre-treated before cyanide gold extraction to open the sulfide envelope or eliminate the factor of gold leaching rate, so that it can be easily cyanide leaching gold. The furnace adopts roasting method to decompose the sulfide in the slag, so that the gold grains are exposed to form loose porous calcine, which is easy to cyanide leaching gold.
  Advantages: The use of DC furnace high temperature arc direct melting enrichment gold extraction process, direct fire melting under appropriate conditions, so that gold and silver and other precious metals concentrated in the smelting products, and then selective blowing further enrichment of gold, and finally achieve deep enrichment of gold.
The process is simple and the treatment cost is low, which is the most common pretreatment method for extracting precious metals from tailings or slag.

  Equipment technical features:
  Using the technical characteristics of DC plasma furnace melting and efficient recovery of precious metals from Taizhuo Company in Britain, the recovery rate of precious metals is greatly improved. The DC electric furnace has the following advantages:
  1) DC electric furnace electrode center temperature up to 3000C, heat concentration, continuous smelting is more suitable for high melting point of rare metal smelting recovery. This technology has been successfully applied to foreign precious metal recycling projects for nearly 20 years, and has been successfully put into use in China's Guiyan platinum industry.
  2) The DC electric furnace has a low flicker effect and noise, which is very beneficial to the power grid and the operator, and its flicker effect is only 50% to 70% of the AC electric furnace, and the noise during submerged arc operation is more than 20dB lower than that of the AC electric furnace. The natural power factor is high, and the power factor can reach 0.92~0.94 without compensation.
  3) The power consumption of DC electric furnace is 10% ~ 15% lower than that of AC electric arc furnace, the electrode consumption is 40% ~ 60% of AC furnace, and the production capacity is increased by ~ 10% compared with AC electric furnace.
  4) Because the operating temperature of the electric furnace is higher than that of the same type of electric furnace, the overall structure is consistent with that of the same type of foreign furnace. The fixed tube type water cooled furnace cover structure provides an effective gas collection and sealing device for smelting operation and gas treatment.
  5) The whole furnace body adopts the separation method of slag liquid and precious metal materials, and a slag outlet is set at the front of the furnace body to discharge slag horizontally, and the furnace body can tilt forward 35° to pour out materials in the later period of smelting.
  6) Adopt the overall multi-touch bottom electrode mode of the furnace bottom, which can effectively solve the arc deflection phenomenon of the DC furnace. The furnace bottom is equipped with a temperature measuring device to detect the lining of the furnace bottom in real time.
  7) Set up a hanging type plugging machine to open and plug the hole of the material port to maintain the nitrogen protection atmosphere in the furnace.
  8) Integrated rectifier power supply adopts three-phase full bridge rectifier device, the AC power supply is rectified into a stable and reliable DC power supply, which can adjust a wide range of voltage and is suitable for a variety of material processes. The rectifier device is cooled by independent closed cooling equipment, which is safe and reliable.
  9) The electrode lifting control adopts Siemens programmable controller, the actuator adopts German Parker proportional valve to control the hydraulic cylinder lifting mode, and the voltage and current double closed-loop control is implemented. The low-voltage electric appliance uses Schneider components to effectively ensure the reliability and advanced nature of the equipment.
  10) Advanced computer operating system, real-time operation and operation management of operation process and operation parameters.