Process for Extracting Rare and Precious Metals from Tailings

Tailings extraction of rare and precious metals process flow overall solution

I. Overview: The green key to unlocking urban mines

Facing the global challenges of depleting primary mineral resources and tightening environmental constraints, historical tailings ponds and newly produced tailings have become a "city mine" in need of development. These tailings still contain a considerable amount of unrecovered gold, silver, platinum, palladium, rhodium and other rare and precious metals, which are of great value.

This tailings extraction program is designed for the economic, efficient and environmentally friendly deep extraction of residual rare and precious metals from all types of tailings. We provide a full set of services from resource assessment, technology selection, engineering design to operational support, aiming at transforming your tailings from "environmental liabilities" to "value assets", realizing a win-win situation of resource efficiency and environmental benefits.

Second, the core value of tailings reelection

• Resource value-added: mining tailings in the hidden economic value, without mining costs, greatly enhance the comprehensive utilization of the original resources.

• Environmental burden reduction: reduce the environmental risks and land occupation brought by tailings stockpiling, and fulfill corporate social responsibility.

• Efficient investment: The project investment is mainly concentrated in the ore dressing process, with a short payback period and significant economic benefits.

• Technology empowerment: adopting advanced technology to deal with "waste", turning waste into treasure, which is an exemplary practice of circular economy.

Core technology process: four-step method of precise recycling

The first step: comprehensive tailings characteristics diagnosis (the basis of "the right medicine")

• Precise composition detection: XRF, ICP-MS and other advanced means are used to accurately analyze the type, content and state of rare and precious metals in the tailings.

• Process mineralogy research: through MLA, SEM and other technologies, identify the embedded characteristics, particle size distribution, dissociation degree and symbiotic relationship of the target minerals, which is the key to determining the success or failure of the re-election process.

• Optional evaluation and program customization: Through systematic laboratory tests and extended tests, determine the optimal recycling process route and expected indexes that are technically feasible and economically reasonable.

Step 2: Precise pre-treatment ("activation" and "preparation")

• Thickening and dewatering: Use high-efficiency thickeners or dewatering screens to reduce the water content of tailings slurry and create stable conditions for subsequent sorting.

• Classification: Use hydrocyclone or high-frequency fine screen to hydraulically classify the tailings, realizing "mud and sand separation", and adopting the most suitable sorting process for different particle sizes, which greatly improves the efficiency.

• Activation treatment: According to the results of mineralogical research, physical scrubbing, chemical activation or ultrasonic treatment is used to change the surface properties of minerals, break the oxidized film, and significantly improve the floatability or leachability of target metals.

Step 3: Multi-technology combined deep recovery ("core extraction" link)
According to the characteristics of tailings, we flexibly combine the following advanced technologies:

Step 4: Closed-loop wastewater and tailings management (guarantee of the "green promise")

• Solution metal recovery: For the leaching of precious liquids, resin adsorption (RIP), activated carbon adsorption or zinc powder replacement technologies are used to efficiently recover the valuable metals therein.

• Wastewater purification and recycling: Adopt deep purification and treatment system (neutralization, precipitation, membrane treatment), so that all wastewater can be recycled or discharged in compliance with the standard, realizing the goal of "zero discharge".

• Tailings stabilization and harmlessness: stabilization of the final tailings to prevent heavy metal ions precipitation, to ensure its long-term stability, harmless, can be used for backfill or safe storage.

Fourth, tailings in advance of rare precious metals program advantages

• Customized design: never "one size fits all". We tailor-made technical route according to your tailings characteristics, and provide modular design, support phased investment and construction.

• Mature and Reliable Technology: The solution integrates a variety of advanced sorting technologies that have been validated by engineering around the world, and has many successful cases to ensure stable operation of the project.

• Remarkable economic benefits: the cost of raw materials is nearly zero, and the core value of the project lies in the ability to transform technology, with a high rate of return on investment.

• Win-win environmental and social benefits: the whole process implements the concept of green recycling, reduces environmental pollution, eliminates potential safety hazards, and enhances the social image of the enterprise.

V. Successful Cases

A large-scale historical gold mine tailing pond redevelopment project

• Challenge: The tailings are fine in particle size, heavily oxidized, contain inclusions of gold and difficult to process gold, and the recovery rate of the traditional process is extremely low and uneconomical.

• Our solution: Adopt the combined process of " Classification - Re-extraction (centrifuge) to enrich coarse gold - Enhanced flotation to recover fine sulphide-bearing gold - Environmental agent leaching (RIP adsorption) to treat very fine-grained inclusions of gold ".

• Achievements:

  • Successfully realized the economic recovery of gold and silver, and the payback period of the project is less than 2 years.

  • Completely solved the historical environmental problems of the tailing pond, which was highly recognized by the local environmental protection department and brought great economic and social benefits to the client.

Our Technical Service Commitment

We provide "one-stop" technical services for tailings extraction of rare precious metals throughout the project:

1. Resource assessment and feasibility study: detailed tailings property diagnosis and selectivity test, provide authoritative reports.

2. Process design and optimization: Based on the test results, we design the optimal process and equipment layout.

3. Specialized equipment supply and integration: Provide a full set of efficient and reliable specialized processing equipment and automation control system.

4. Installation, commissioning and production support: expert team on-site guidance for installation, commissioning and trial production to ensure that the project meets the standards and production.

5. Personnel training and technical support: train professional technical team for customers and provide long-term production optimization and technical support.

For detailed tailings extraction of rare precious metals solutions or technical consultation, please contact our professional technical team, we will provide you with the most optimized tailings extraction of rare precious metals process solutions and production line quotes.Act now to unlock the hidden wealth in your tailings storage!