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S.N.

Representative Technology

Key Features of the Technology

Core Patent(s)

I.

Non-ferrous Metals Sector

1-1

Open-pit Mining

Multiple advanced integrated open-pit mining technologies have been developed, including open-pit limit optimization, slope control, semi-mobile crushing and continuous conveying, dynamic grade control for open-pit mines, and bulk material conveying and stacking.

System and method for stacking in permanent heap leaching pads with a large self-moving bridge-type spreader (CN201610284011.6);
Clean and polluted water separation system for open-pit non-ferrous metal mines (CN201520785849.4);
Air-relief method for karst water-rich mines (CN200910115942.3)

1-2

Deep-shaft Mining

Multiple advanced key deep-shaft mining technologies have been developed, including deep-shaft hoisting and loading, deep-shaft drainage, deep-shaft backfilling, and fully automated unattended operation. Technical bottlenecks have been overcame in deep-shaft hoisting, drainage, high-volume ventilation, and backfilling, establishing solid technical advantages in the safe and efficient mining of kilometer-deep shafts.

Stage-wise upward continuous backfill mining method without top and bottom pillars (CN200910115699.5);
Anti-impact skip loading device (CN201310119031.4);
Hydraulic telescopic corbel drainage pipe elbow support for deep vertical shafts (CN201520825521.0);
Acoustic monitoring device for hazardous gases in underground blasting zones (CN201110170440.8)

1-3

Mineral Processing and Leaching

Advanced mineral processing technologies, together with novel grinding-classification systems and series of high-efficiency gravity separation equipment, have been developed for copper, tungsten, tin, tantalum, niobium, gold, and silver to improve mineral processing recovery rates and economic benefits. In-depth research on leaching processes for copper, gold, and cobalt has been conducted and highly efficient hydrometallurgical technologies such as ultra-large-scale heap leaching, agitation leaching, and bacterial pre-oxidation for refractory gold extraction have been developed and successfully applied in numerous domestic and international projects.

Mineral processing technology for mixed slag from flash furnace, converter, and slag cleaning furnace (CN200910114922.4);
Mineral processing technology for efficient recovery of tantalum and niobium ores (CN200910186049.X)

1-4

Mine Waste Resource Recovery

Advanced comprehensive tailings utilization technologies, green building material preparation technologies based on mine solid waste, and copper recovery technologies from slag have been developed to improve valuable metal recovery rates and achieve secondary green utilization of mine solid waste. Tailings-free mineral processing plants have been built in multiple mines, yielding significant economic, environmental, and social benefits.

Process for iron recovery from copper smelting slag flotation tailings (CN201510231002.6)

1-5

Flash Smelting

One of the Company's most core competitive technologies. Through years of research and engineering practice, advanced and reliable engineering technologies for copper flash smelting systems, along with proven design technologies for flash smelting furnaces, have been developed. Advanced computational and design methods have been utilized to improve design efficiency and quality, successfully promoting flash smelting technology to many countries and regions worldwide.

Arrangement method for "double-flash" copper smelters (CN201210427685.9); High-temperature dust conveying system and method (CN201210460761.6)

1-6

Bath Smelting

Bath smelting technologies have been developed for non-ferrous metallurgy (copper, lead, nickel, among others), hazardous waste treatment, and renewable resource recovery, with engineering design quality ensured through advanced metallurgical calculations, physical field simulations, and engineering design software. The technologies have been widely applied in domestic and international projects.

Side-blown smelting equipment and method (CN201310161153.X); Top-blown and side-blown continuous smelting equipment and method (CN201510329283.9)

1-7

Copper Electrolysis

A novel dual-directional parallel-flow high-current-density copper electrolysis process has been developed and has been successfully applied in large-scale copper electrolysis production through computer simulation and pilot tests. The overall technology and key indicators are internationally leading, featuring low energy consumption, simplified and easily maintainable equipment, and superior comprehensive economic benefits.

Cathode stripping equipment (CN201010612430.0);
Arrangement method of anode preparation machines for electrolysis (CN201110441289.7)

1-8

Copper Hydrometallurgy

Distinctive solvent extraction - electrowinning (SX-EW) engineering technologies for high-purity cathode copper production have been developed, including large mixer-settler extraction tanks, spiral two-phase height adjustment for large extraction settlers, advanced organic impurity removal technologies, complete electrowinning process solutions, and rectifier cooling water comprehensive utilization technologies.

Hydrometallurgical copper extraction process (CN201210122981.8);
Two-phase height adjustment method for large extraction settlers (CN201210193932.3)

1-9

Secondary Copper Recovery

Complete NGL furnace process and equipment for scrap copper, top-blown converter process and equipment for low-grade secondary copper, and permanent cathode electrolysis process for secondary copper have been developed to systematically resolve secondary copper recovery issues.

Process and equipment for scrap copper refining with nitrogen stirring and oxygen-enriched gas (CN200910168628.1)

1-10

Spent Lead-acid Battery Recovery

Complete side-blown metallurgical technologies have been developed for processing spent lead materials, improving smelting efficiency. The characteristic pollutant emissions are far below the national limits. The technologies resolve common industry issues in China's secondary lead sector, such as low technological equipment levels, poor comprehensive resource recovery, and high energy-saving and emission-reduction pressures.

Treatment system and method for spent lead-acid batteries (CN201210143964.2)

1-11

Multi-metal Recovery from Complex Materials

NRTS top-blown smelting technology for e-wastes, NRTC side-blown smelting technology for low-grade copper-bearing scrap, and hydrometallurgical engineering technologies for recovering precious and rare metals from copper anode slime have been developed to achieving multi-metal recovery from complex materials.

Side-blown continuous smelting equipment for e-wastes (CN201210517477.8); Method and system for treating off-gas from e-wastes (CN201410612457.8)

II.

Environmental Protection Sector

2-1

Off-gas Sulfuric Acid Production

Highly efficient and energy-saving sulfuric acid production technologies for high-concentration SO2 off-gas have been developed, including non-equilibrium high-concentration SO2 conversion, partial-dilution and pre-conversion, and pre-conversion and pre-absorption technologies.

Method for producing sulfuric acid through double conversion of non-equilibrium high-concentration SO2 (CN201210578958.X); Comprehensive recovery and sulfuric acid production process for low-concentration SO2 off-gas from multiple sources (CN201310274572.4)

2-2

Desulfurization and Denitrification

Engineering technology advantages in desulfurization and denitrification have been established, including organic amine desulfurization, zinc oxide - acidolysis desulfurization, and hydrogen peroxide desulfurization, as well as SNCR denitrification, SCR denitrification, and ozone denitrification. These technologies have been successfully applied and promoted in numerous domestic and international projects.

Combined off-gas quenching and denitrification system (CN201721634059.1)

2-3

Weak Acid Treatment

A highly efficient continuous treatment process for heavy metal-bearing weak acid has been developed, using H2S generated from the reaction of dilute sulfuric acid with Na2S/NaHS as a sulfiding agent. It resolves issues of excessive sodium salts into subsequent wastewater, discontinuous waste acid sulfidation, and safety hazards associated with H2S from hydrogen and sulfur, improves heavy metal ion removal rates and facilitates subsequent wastewater treatment and reuse.

System for continuous wastewater purification using gas (CN201920424591.3);
Method and system for continuous wastewater purification using gas (PCT/CN2019/093384, IN202127038012, L202102436)

2-4

Solid Waste Disposal

Key technologies for the entire hazardous waste incineration process and landfill pollution control have been developed, including multi-form composite pretreatment technologies, anti-clogging and uniform combustion technologies for incinerators, multi-effect guaranteed technologies for incineration off-gas treatment, foundation anti-seepage improvement technologies, novel composite anti-seepage technologies, composite anti-seepage monitoring technologies, 3D grid graphical landfill operation management technologies, leachate blockage clearing and in-situ sludge-water separation technologies, solidification/stabilization agents and eco-friendly pretreatment technologies.

System for treating incineration off-gas (CN201420297025.8); Hazardous waste landfill system (CN202021868667.0)

2-5

Advanced Wastewater Treatment

Optimization and innovation have been conducted for traditional advanced wastewater treatment units for non-ferrous smelting by using recovered CO2 for softening and calcium removal, replacing sedimentation tanks with suspended media filtration, and adding TVR (thermal vapor recompression) pumps to evaporation processes. It achieves water conservation and emission reduction while lowering operating costs and reducing CO2 emissions.

Wastewater treatment system and method (CN201610027155.3); Novel zero-discharge treatment system and method for high-salinity heavy metal wastewater (CN201310405559.8)

2-6

Site Pollution Prevention and Control

Anti-pollution three-dimensional composite seepage barrier technologies and environmental remediation technologies for contaminated non-ferrous industrial sites have been developed. The anti-pollution three-dimensional composite seepage barrier technologies strictly isolate pollution sources from underlying and surrounding soil and groundwater through a multi-layered barrier, minimizing the risk of groundwater and soil contamination caused by pollutant leakage. The environmental remediation technologies for contaminated non-ferrous industrial sites include topsoil-free tailings amendment, topsoil-free ecological restoration, and rock slope vegetation bag technologies. These technologies not only solve the challenges of soil moisture and nutrient retention on rock slopes, but also prevent acidic seepage from damaging plants, thereby achieving maintenance-free ecological restoration.

Anti-pollution three-dimensional composite seepage barrier system (CN201310291574.4); Method for topsoil-less vegetation restoration on strongly acidic abandoned tailings sites (CN201410801068.X)

III.

Equipment Integration Sector

3-1

Non-ferrous Metallurgical Equipment

Complete copper electrolysis equipment and copper pyrometallurgical equipment have been developed to resolve critical industry bottlenecks. The complete copper electrolysis equipment features vectorized stripping, high-efficiency dual-channel anode lug milling, intelligent crane position correction, and precise positioning. The equipment is highly efficient and energy-saving, and has been exported to multiple countries. The pyrometallurgical equipment is highly automated, with large production capacity and energy-saving features, resolving the issues of severe pollution, low efficiency, and high energy consumption associated with traditional technologies.

Crane system, its position detection device, and position detection method (CN201510659184.7);
Copper anode plate bottom lug milling device (CN201110425115.1)

3-2

Automation and Intelligentization of Non-ferrous Metallurgical Processes

The automation technology for copper metallurgical processes is supported by PLC/DCS hardware, combined with communication and bus technologies, and supplemented by control platform software. It integrates all control tasks of the copper metallurgical production processes, achieving remote control, safe and reliable operation, precise monitoring, data collection and analysis, as well as energy reduction and efficiency improvement. It also lays a solid foundation for the digitalization and intelligentization of metallurgical plants and mines. The company has designed and implemented multiple intelligentization projects for non-ferrous metallurgical plants and mines.

Copper matte converting endpoint identification and monitoring system (CN201220534986.7);
Online intelligent monitoring system for smelting furnace cooling water flow rates based on bus transmission (CN202020623146.2)