Henan Ascend Machinery Equipment Co., Ltd.
Henan Ascend Machinery Equipment Co., Ltd.
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5000T Per Heap Leaching Design For Gold
I. Work flow
A. Raw materials preparation (Crushing stage)
Detailed flow process: raw material is transported into coarse by feeder, after crushing, it will be screened. Not-qualified product(big particle) will get into middle crushing stage and then screened by vibrating screen. Finally, qualified product will be transported into storage. Capacity of crushing stage is 400tons per day.
B. Storage area construction
Construct two stock dump of 32*32m, it should be level, and has 3% angle in horizontal and vertical direction. Flatten after laying our clay, and construct drainage ditch and prevent flood into dump.
After storage area is prepared well, lay out high strength polyethylene thin film(film needs to be welded together, prevent leakage, then add 30cm clay on the film, at last, pile up 20cm sand stone and brittle stone(smaller than 20mm).
Construct intercepting gutter, settling pond, barren liquor pond, pregnant liquid pond, pregnant liquid pond and adsorbing column.
C. Heap construction
Qualified crushing product us transported into stock dump by using loader and pile up uniformly to 4m.
D. Maceration and Washing
After construction of storage dump, spray sodium hydroxide of PH 11 on the dump, when PH is close to 10, add cyanide into shower.
E. Pregnant solution goes through adsorption, desorbing and electrolysis, then gets gold mud. After melting, gold mud becomes gold spindle.
F. After heap leaching, ore dump no needs to transport away, which will become permanent waste dump or re-construct after tearing down.
Equipment List
| Item | Working process | Equipment | Model | Qty. | Unit power /KW | Remark |
| 1 | Storage bin | Gold tailing bin | 40m3 | 1pcs | Reinforced concrete | |
| 2 | Pre-screening | Grizzly | 350*350 | 1set | Steel rail & steel rod | |
| 3 | Feeding | Vibrating feeder | GZD850*3000 | 1set | 11 | |
| 4 | Coarse crushing | Jaw crusher | PE400*600 | 1set | 30 | |
| 5 | Conveying | Belt conveyor | B650×28m | 1set | 11 | |
| 6 | Screening | Circular vibrating screen | 2YK1548 | 1set | 15 | Mesh size 48 & 24mm |
| 7 | Conveying | Belt conveyor | B650×25m | 1set | 7.5 | |
| 8 | Secondary Crushing | Fine crusher | PEX250*1200 | 1set | 45 | |
| 9 | Conveying | Conveying | B650×18m | 1set | 7.5 | |
| 10 | Seepage-proofing | Polyethylene film | HDPE film (1mm thickness) | 2sets | 5000㎡,Matched with flange, elbow, spray-head, three links, joint and end cap | |
| 11 | Spraying | PVC tube and accessories | Ø65×300m(main pipe) | 1sets | Matched with flange, elbow, spray-head, three links, joint and end cap | |
| 12 | Pregnant liquor | Pregnant liquor tank | 10×20×1.5 | 2pcs | Brick setting and cement sand plaster build by self | |
| 13 | Barren liquor | Barren liquor tank | 10×20×1.5 | 2pcs | Brick setting and cement sand plaster build by self | |
| 14 | Adsorption pump | Submersible pump | 50WQ30-30-7.5 | 3sets | 7.5 | Lift: 30m; |
| 15 | Spraying pump | Submersible pump | 50WQ30-30-7.5 | 3sets | 7.5 | Lift: 30m; |
| 16 | Adsorbing | Series group of carbon adsorption column | ￠600×2500 | 2sets | / | 4 units in one group; |
| 17 | Drainage pipes | Polyethylene pipe | Inner dia. 60mm | 300m | Connect spray pumps and adsorption pump, etc | |
| 18 | Agents feeding | Mixer | ￠1.5×1.5m | 1set | 3 | Connect spray pumps and adsorption pump.etc |
| 19 | Desorption & electrolysis | Desorption and electro-winning equipment | 300KG | 1set | 36.7 | To process the gold-loaded carbon; |