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HDPE Geomembrane Specification
Item |
Test Value | ||||||
| RH0.30 mm |
RH0.5 mm |
RH0.75 mm |
RH1.0 mm |
RH1.5 mm |
RH2.0 mm |
RH3.0 mm |
|
| Minimum Density(g/cm³) | 0.94 | ||||||
| Strength at yield,N/mm | 5 | 8 | 11 | 15 | 22 | 29 | 44 |
| Strength at break ,N/mm | 8 | 14 | 20 | 28 | 40 | 53 | 80 |
| Elongation at yield,% | 13 | ||||||
| Elongation at break,% | 720min | ||||||
| Tear Resistance N | 40 | 65 | 93 | 125 | 190 | 250 | 375 |
| Puncture Resistance N | 105 | 176 | 240 | 320 | 480 | 640 | 960 |
| Stress Crack Resistance, hrs | 300 | ||||||
| Carbon Black Content, % | 2.0-3.0 | ||||||
| Carbon Black Dispersion | 1 or 2 | ||||||
| Standard OIT Min | 100 | ||||||
| High Pressure OIT Min | 400 | ||||||
| 85ºC Heat aging(OIT Retention rate at Normal pressure after 90d ) % | 85 |
||||||
| UV resistance (OIT retention rate after 1600 hours of UV radiation) | 65 |
||||||
| Impact Cold Crack at -70°C | Pass | ||||||
| Water vapor permeability (g.cm/cm2 .s.Pa) |
≤1.0×10-13 | ||||||
| Dimensional Stability (%) | ±2 | ||||||
What is heap leaching in gold mining?
Heap leaching is a common method of extracting gold from ore bodies near the surface. This is a simple technique that involves piling crushed ore on a pile and then pouring a liquid solution into the pile to extract the precious metals.
The liquid solution used in heap leaching is usually a weak cyanide solution that dissolves gold particles in the ore. The pile is then left to sit for an extended period of time, usually several months, while the solution drips through the pile and collects in a reservoir at the bottom.
The advantages of heap leach in gold mining are many. First, it is a relatively simple and inexpensive method that requires little technical expertise or equipment. It is also very effective at extracting gold, with recovery rates as high as 90%.
Additionally, heap leaching is environmentally friendly. Rather than using toxic chemicals to extract gold like other mining methods, heap leaching uses a weak cyanide solution that biodegrades easily. Additionally, waste dumps are often located in remote areas, reducing potential impacts on local communities.
In Gold mining heap leaching, what materials used together with geomembrane
The process of gold mining heap leaching requires the use of a variety of materials to ensure a successful operation. One such material is a geomembrane, which is a synthetic lining that helps to prevent the leaching solution from seeping into the surrounding environment.
When used in conjunction with a geomembrane, gold mining companies typically use a range of materials such as:
HDPE Geomembrane Packing and Delivery
Tai'an City RuiHeng Building Materials Co., Ltd is specialized in the research, development, production and sales of geosynthetic materials, plastic products and plastic machinery. Our company is devoted to geosynthetic material research and development and application.
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