Tianjin Zhonglian Green Technology Development Co., Ltd. won the first prize of "2022 China Nonferro
Recently, the China Nonferrous Metals Industry Association and the China Nonferrous Metals Society issued the "2022 China Nonferrous Metals Industry Science and Technology" award list, Tianjin Zhonglian Green won the "2022 China Nonferrous Metals Industry Science and Technology" first prize with the "Non-ferrous mining solid waste yard pollution barrier and ecological restoration key technology and demonstration application".
The selection of the industry with major technological innovation, advanced technical indicators, mature and reliable technology, significant economic and social benefits of the technology for multi-dimensional comprehensive evaluation. The award-winning "Non-ferrous Solid Waste Yard Pollution Barrier and ecological restoration Key technology and Demonstration Application" technology, for different types of non-ferrous solid waste yard pollution prevention and control technology and ecological restoration key technology research, through technology integration and demonstration, to carry out typical non-ferrous metal mining and smelting solid waste yard pollution prevention technology and ecological restoration key technology. It provides a scientific basis for the pollution control and ecological restoration of the solid waste yard of non-ferrous mining and metallurgy, and effectively solves the environmental pollution problem of the yard. Now, it has been successfully applied to a number of classic cases in Tianjin Zhonglian Green, and has achieved great environmental and social benefits.
Risk and hidden danger regulation project of a phosphogypsum reservoir (slag reservoir) in Qinghai
After many years of operation in the reservoir area, there are a number of environmental and safety hazards, which are in urgent need of rectification. The main contents of the project include: anti-seepage upgrading of the return pool; Repair and construction of flood control and intercepting facilities in reservoir areas; Slope collapse area solidification; Reservoir slope safety protection; Sedimentation and displacement monitoring in reservoir area. Among them, in the anti-seepage upgrading project of the return pool, the vertical barrier of GCL is set downstream of the return pool to further block the liquid seepage of the return pool, and at the same time, it plays the role of stabilizing the dam body downstream.
GCL vertical anti-seepage technical parameters
1. The underground natural impervious layer is determined to be the moderately weathered mudstone layer with a permeability coefficient of 2.0×10-6cm/s -- 7.0×10-7cm/s. The bottom of GCL is inserted into the moderately weathered mudstone layer of 3.0m, and the wall depth is about 13~24 m.
2. The design of MC-GCL meets the requirements of the Technical Specification for Vertical Barrier of Industrial Contaminated Sites (HG/T 20715-2020);
3. Wall backfill material cement-bentonite, thickness 600mm;
4. Wall permeability coefficient is less than 1×10-7cm/s;
5. The overlap width of MC-GCL composite component is ≥45cm.
GCL composite vertical anti-seepage barrier technology is an international pioneer technology independently researched and developed by Tianjin Zhonglian Green Technology Development Co., LTD., with completely independent intellectual property rights, and has formed a relatively complete technical system and process system. The technology is suitable for all existing slotted vertical anti-seepage walls, especially for contaminated site restoration, waste management of old landfill sites, pollution control of slag dumps, risk control of hazardous landfill sites, tailings DAMS and other vertical anti-seepage fields with high requirements.
