50Kg Capacity Silver Refining Machine Purification Of Silver By Electrolysis

Product Details:
Place of Origin: zhengzhou
Brand Name: jinquan
Certification: CE
Model Number: 20 kgPayment & Shipping Terms:
Minimum Order Quantity: 1 set
Price: negotiate
Packaging Details: plywood case
Delivery Time: 30 days
Supply Ability: 100-200 sets

Product Description

50Kg Capacity Silver Refining Machine Purification Of Silver By Electrolysis

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The company's main business: silver electrolysis unit, gold electrolysis unit, nitrogen oxide waste gas treatment system equipment, platinum, palladium and rhodium refining and purification production and other common equipment

50 kg capacity silver refining machine

silver refining process

Cathode current density 750A/m2.

Mechanical mixing, automatic scraping silver powder

Temperature control of electrolyte cooling

(1) Cast silver anode plate: the silver electrolysis process requires casting coarse silver into an anode plate, and inserting the cast silver anode plate into the silver automatic electrolysis equipment for subsequent electrolysis. Therefore, the process of casting anode plate must be carried out before the raw crude silver enters the electrolytic process.

(2) Preparation of silver electrolyte and recovery of waste electrolyte: the process of manufacturing silver nitrate solution and mixing silver and nitric acid in water is called liquid making. The liquid can be prepared by reacting pure silver with nitric acid. The reaction equation of silver and nitric acid is as follows:

Ag+2HNO3→AgNO3+NO2↑+H2O

When the impurity content of electrolyte is too high, sodium chloride is added to the waste electrolyte, and sodium chloride reacts with silver nitrate to form silver chloride precipitation. The generated silver chloride precipitation is returned to the silver precipitation barrel for silver precipitation, and the coarse silver obtained after filtration is melted, cast and electrolyzed.

(3) Silver electrolysis: clean the surface of anode rod, conductive bar and electrolytic hook, put it into anode plate, and then adjust the current and voltage of silver electrolysis unit to the specified value, and then start the automatic scraper system. During the electrolysis process, only one person needs to stop to inspect whether the electrolysis is normal.

Figure 3 silver electrolysis equipment

(4) Cleaning and drying: the electrolytic silver is scraped out by the automatic scraper system. After electrolysis, open the discharge valve to clean and dry the produced silver powder and cast it into the required silver ingot.

(5) Purifying electrolyte: slowly stir and add NaOH into the waste electrolyte or silver containing waste liquid in the silver precipitation barrel, adjust the pH, filter, and the obtained silver oxide is used for standby. The waste liquid is treated. Add waste electrolyte into the electrolyte purification kettle, then stir slowly, add Ag2O, adjust the pH of the electrolyte, and take samples for several times to observe the electrolyte until the electrolyte becomes colorless and transparent. Finally, HNO3 is added, the pH is adjusted to the original pH, and filtered to obtain silver nitrate solution.

(6) Anode slime treatment: add nitric acid to the anode slime, which can dissolve other metals in the anode slime except gold, and then add NaCl to the solution. Silver nitrate reacts with NaCl to form AgCl precipitation. Add iron powder to the precipitation to replace coarse silver, and then take the coarse silver to melt and cast the anode plate.

no type Equipment name model material unit quantity note  
1 Gold refining Pulverizer ZFJ-10 combination set 1    
2 condenser 2*2.5㎡ glass set 1 Including support frame  
3 Nitric acid high level tank 200L PPH set 1    
4 Impurity removal kettle 300L titanium set 1 Double layer titanium kettle, steam heating  
5 Vacuum filter disc φ800*1200 PPH set 1    
6 Delivery pump IMC32-25-125FT combination set 1    
7 condenser 2*2.5㎡ glass set 1 Including support frame  
8 Hydrochloric acid high level tank 200L PPH set 1    
9 Dissolving kettle 300L titanium set 1    
10 Vacuum filter disc φ800*1200 PPH set 1    
11 Precision filter JK-2006 combination set 1 Filtering accuracy 5 μ m  
12 Noble liquid high level tank 200L PPH set 1    
13 condenser 2*2.5㎡ glass set 1 Including support frame  
14 Sodium sulfite mixing tank 200L PPH set 1 With stirring, with saturated sodium sulfite  
15 Primary reduction kettle 500L enamel set 1    
16 Vacuum filter disc φ800*1200 PPH set 1    
17 Reducing solution high level tank 500L PPH set 1    
18 condenser 2*2.5㎡ enamel set 1    
19 Secondary reduction kettle 500L enamel set 1    
20 Vacuum filter disc φ800*1200 PPH set 1    
21 Waste liquid tank 500L PPH set 1    
22 Purification kettle 300L enamel set 1    
23 Vacuum filter disc φ800*1200 PPH set 1    
24 Delivery pump IMC32-25-125FT combination set 1    
25 Steel platform     set 1 We draw the design and the owner is responsible for the installation  
26 Silver refining Liquid making system 100L combination set 1 Titanium containing liquid making kettle, condenser, high-level tank, filter disc transfer pump and support platform  
27 Electrolyte purification barrel 100L PE set 2    
28 Vacuum filter disc φ600*600 PPH set 1    
29 Silver bucket 100L PE set 2    
30 Vacuum filter disc φ600*600 PPH set 1    
31 Silver electrolysis complete set 50kg/d PPH set 1 Including electrolytic cell, rectifier power supply, circulating cell, etc  
32 Silver anode mould Silver electrolysis matching casting set 5    
33 auxiliary equipment Vacuum unit 500m3/h combination set 1    
34 Vacuum buffer tank φ800*800 PPH set 1    
35 cooling-water machine 10HP combination set 1    
36 Steam generator 144kw combination set 1    
37 Pure water unit 500L/h combination set 1    
38 other Liquid pipes and fittings     set 1    
39 Waste gas pipes and fittings     set 1    
40 distribution     set 1    
41 Packaging and transportation expenses     set 1    
42 Design service fee     set 1 Process, operating procedures and installation drawing design  
43   total USD FOB

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