Apparatus and method for recycling recovery of the valuable metal by alkaline leaching

一种有价金属、回收装置的技术，应用在回收利用技术、工艺效率的提高、细胞等方向，能够解决工序费用上涨、效率低下、处理时间长等问题，达到实现装置效率性、防止气体渗漏、改善回收率的效果

Inactive Publication Date: 2012-12-26
KOREA INST OF GEOSCI & MINERAL RESOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The usual alkaline leaching method is to use an aqueous solution that dissolves a large amount of alkali salt to react and dissolve under high temperature conditions. Due to the continuous consumption of alkali, not only a large amount of alkali salt is required, but also the waste liquid generated will cause environmental pollution. Compared with acid , the cost of alkali salt is higher, which becomes the main reason for the increase of process cost
[0005] As another method, there is also a method of using electrolysis. The above-mentioned electrolysis method is not only used for the valuable metals contained in the waste water, but also partly used for the treatment and production process of common inorganic or organic compounds, but this method has Disadvantages of long processing time or inefficiency due to the need for additional equipment

Method used

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  • Apparatus and method for recycling recovery of the valuable metal by alkaline leaching
  • Apparatus and method for recycling recovery of the valuable metal by alkaline leaching

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] As a solution for the electrolytic chlorine generating cell, use 280 mL of 1 mol·L -1 Hydrochloric acid, use 280mL of 2mol L in the cathode chamber -1of NaCl solution. After the graphite electrodes respectively provided in the anode chamber and the cathode chamber were connected with electric wires, a current of 2A was applied to generate an electrochemical reaction. At this time, the pH of the cathode chamber increases as time passes while generating sodium hydroxide. When the current is applied for 450 minutes, the pH value is 13.376. At this time, the concentration of sodium hydroxide in the solution is 0.24mol L -1 .

Embodiment 2

[0073] As a solution for the electrolytic chlorine generating cell, 270 mL of 1 mol·L -1 Hydrochloric acid, use 600mL of 2mol L in the cathode chamber -1 of NaCl solution. After the graphite electrodes respectively arranged in the anode chamber and the cathode chamber are connected with electric wires, an electric current is applied to generate an electrochemical reaction. The pH of the cathode chamber increases with the generation of sodium hydroxide over time. At this time, chlorine not used in the dissolution tank was supplied to the cathode chamber to investigate the recycling rate as the chlorine recycling treatment capacity. As the supply amount of unused chlorine supplied to the cathode chamber increases, an electric current theoretically equivalent to the same generated amount of chlorine is applied to the anode chamber. The unused chlorine supply is 0.0326mol h -1 Below, showing a 100% recycling rate, the supply of unused chlorine is 0.0373mol·h -1 , showing a rec...

Embodiment 3

[0075] As a solution for the electrolytic chlorine generating cell, use 250 mL of 1 mol L in the anode chamber -1 Hydrochloric acid, use 600mL of 2mol L in the cathode chamber -1 of NaCl solution. After the graphite electrodes respectively provided in the anode chamber and the cathode chamber were connected with electric wires, a current of 2A was applied to generate chlorine gas. The generated chlorine reacts with 200ml of NaOH aqueous solution of pH 13.5 in the leaching tank to prepare OCl - The concentration is 0.9molL -1 oxidizing alkali solution. The final pH of the solution was adjusted to 13. The temperature of the prepared solution was kept at 40° C. and stirred at 400 rpm, and 1 g of ruthenium powder was charged and dissolved. The dissolution reaction was maintained for 30 minutes, and as a result, the dissolution rate reached 100%. Subsequently, the temperature of the dissolution tank was 80°C, and the injection rate of air carrier gas was 400ml·min. -1 . As a...

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Abstract

The present disclosure provides an apparatus and a method for recovery of valuable metals. The apparatus includes an electrolytic chlorine producing bath, a dissolution bath disposed at a rear side of the electrolytic chlorine producing bath to perform leaching of a valuable metal content, a gas supplier connected to the dissolution bath to supply a carrier gas, a collection bath disposed at the rear side of the dissolution bath to collect a volatile material, a separation bath separating and purifying a leaching reactant generated in the dissolution bath, and chlorine and sodium hydroxide recirculation lines connecting the electrolytic chlorine producing bath, the dissolution bath and the separation bath. The apparatus permits recovery of valuable metals according to characteristics of the valuable metal, and the chlorine and sodium hydroxide recirculation lines of the apparatus provides optimized recovery rate and efficiency, thereby realizing economic feasibility.

Description

technical field [0001] The present invention relates to a method containing copper (Cu), zinc (Zn), tin (Sn), chromium (Cr), indium (In), lead (Pb), molybdenum (Mo), vanadium (V), tungsten (W) , zirconium (Zr), germanium (Ge), rhenium (Re), gold (Au), iridium (Ir), rhodium (Rh), ruthenium (Ru), osmium (Os) or valuable metals containing a mixture of the above components A recovery device and a method for recovering valuable metals using the recovery device, more specifically, relates to a method for volatilizing chlorine generated in an electrolytic chlorine generating tank in the form of oxides or dissolving it as a leaching solution according to the type of valuable metals , thus recoverable valuable metal alkali leaching, recovery device and the recovery method utilizing the above-mentioned valuable metal alkali leaching, recovery device, the above-mentioned device belongs to the closed system, it is characterized in that, by making the anode in the electrolytic chlorine gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C7/00C25B9/00C25B1/34C25B9/19
CPCC22B3/045C25B1/34C22B3/12C22B3/02C22B7/008C25B15/08C25B9/08C25B1/46B01D19/0005Y02P10/20C25B9/19C22B3/14C22B3/20Y02W30/50
Inventor 金珉奭李在天
Owner KOREA INST OF GEOSCI & MINERAL RESOURCES
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