Copper dross sorting treatment and resource utilization solutions

Copper slag sorting treatment and resource utilization solutions

Copper dross sorting and treatment process, copper dross sorting technology, copper dross full quantitative high-value resource utilization solutions

I. Background and Program Overview

Copper slag is the main by-product of copper pyrometallurgical smelting process, and every 1 ton of copper production generates about 2.2 tons of copper slag. Such slag contains considerable valuable elements, in addition to copper (Cu), but also rich in iron (Fe), silicon (Si), and often accompanied by a small amount of zinc (Zn), nickel (Ni), cobalt (Co) and other metals, and its main physical phase is iron olivine and magnetite. Traditional stockpiling not only causes serious waste of resources, but also environmental risks. Efficient sorting and resource utilization of copper slag is an inevitable choice for smelting enterprises to reduce costs and increase efficiency and realize green and sustainable development.

This copper slag sorting treatment and resource utilization solutions are aimed atrecovering valuable metalsthroughefficient sorting technology, and innovativelyutilizingthe tailings of the sorted slagin high value, turning waste into treasure, opening up new profit growth points for smelting enterprises, and realizing the unity of environmental benefits and economic benefits.

Second, copper slag sorting treatment process

According to the source of copper slag, age and physical and chemical properties (especially the embedded particle size and state of copper particles), we provide two kinds of high efficiency copper slag sorting routes that have been verified by engineering.

Route 1: Combined gravity separation-magnetic separation process (for traditional coarse-grained copper slag and modern fine-grained complex copper slag)

This process is physical dry/wet sorting, environmental protection and no pollution.

1. Pre-treatment and crushing and screening: Multi-stage crushing of lumpy copper slag by jaw crusher, cone crusher, etc., and initial grading by screening to create conditions for efficient sorting.

2. Jigger roughing:

   • Principle: Utilizing the huge specific gravity difference between copper particles and silicate veinstone, under the action of water flow drumming and bed layer of jigger, the copper metal particles with high specific gravity will sink to become heavy product (concentrate), and the waste slag with low specific gravity will be the uplifted material (tailings).

   • Application: For early discharge, copper slag with coarse copper particles, this step can directly recover most of the monomer dissociated metallic copper, with remarkable effect and high return on investment.

3. Grinding dissociation: for the modern smelting technology output of fine-grained, embedded complex copper slag, jigging roughing after the coarse concentrate and the middle ore need to enter the ball mill for grinding, so that the copper particles in the congeners fully dissociated.

4. Shaking table selection: the material after grinding is sent to shaking table for fine sorting to further purify the copper concentrate and obtain some iron rich products.

5. Magnetic separation and iron removal: using the magnetic difference between magnetite (Fe₃O₄) in copper slag and copper and slag, the magnetic separator is used to separate the iron minerals out, which can not only get the iron concentrate product, but also avoid the interference of iron on the subsequent copper flotation and purify the copper product.

Route 2: Flotation process (for very fine-grained embedded, copper slag in the form of copper oxide or copper sulfide)

Flotation is a highly efficient option when copper is mainly embedded in the form of fine particles and recovery by physical methods is limited.

• Principle: Based on the difference between the physical and chemical properties of the target mineral and the surface of the vein. By adding trapping agent (e.g., butylated yellow drug), activator (e.g., sodium sulfide), and frothing agent, gas bubbles are generated by inflation in the flotation machine, so that copper minerals are selectively attached to the bubbles and floated upwards, thus realizing the separation.

• Case technical index: under the grinding fineness (e.g. -0.074mm accounts for more than 90%) and pharmaceutical system, high quality copper concentrate with copper grade >28% and recovery rate >90% can be obtained.

• Application suggestion: Although the recovery rate is high, there is pressure on tail water treatment and environmental protection due to the need to use chemicals. We usually recommend that it be used as a supplement to the gravity separation-magnetic separation process, or be used with caution when environmental protection permits and a complete water treatment system is available.

Suggestions for process selection: We will first conduct a detailed analysis of the material composition and particle size of the customer's copper slag, accordingly recommend the most economical, most efficient, most environmentally friendly customized copper slag sorting and treatment program, do not blindly copy.

Third, the tailing full quantitative high-value utilization

Copper slag sorting tailings (mainly composed of iron olivine and quartz phase) is a high-quality building materials, to achieve resource utilization in order to completely solve the solid waste problem.

• Cement industry: as a raw material or mixing materialfor cement iron correction, it is consumed in large quantities, with mature technology and stable market.

• Building materials and civil engineering: as raw material forconcrete aggregate, road base material, permeable brick and no-burn brick, with excellent performance, it can completely replace natural sand and gravel.

• High-value direction: after fine grinding, it can be used as mineral admixture to improve the performance of concrete, or as the main raw material for producing grinding aid.

Core value:

• Eat dry and squeeze clean: achieve 100% resource utilization of copper dross, no secondary solid waste generation.

• Green and low carbon: significantly reduce the extraction of natural mineral resources and carbon emissions.

• Benefit multiplier: in the recovery of valuable metals to create the main revenue at the same time, tailings sales to open up the second profit center, significantly improve the overall economics of the project.

Four, copper slag treatment program configuration

• Program A (basic recovery type): "crushing + grinding + sorting". Focus on maximizing the recovery of copper, relatively concentrated investment, fast return.

• Scheme B (comprehensive utilization type): "Scheme A + tailing deep processing". Output copper concentrate powder and building materials (such as new building materials, road base materials, etc.), to achieve the full quantitative utilization of solid waste and maximize the comprehensive benefits.

Our Advantages

1. Exquisite technology: proficient in gravity separation, magnetic separation, flotation and its combined process, can provide recovery and sorting solutions for copper slag with different characteristics.

2. One-stop service: provide full life cycle service from experimental research, engineering design, equipment manufacturing, installation and commissioning to operation and hosting.

3. Excellent equipment: provide a full set of high-efficiency and energy-saving equipment from crushing, screening, jigging, grinding, shaking table, magnetic separation to flotation and resource utilization.

4. Environmental compliance: Priority is given to recommending and designing physical separation solutions without chemical additives to ensure that the project passes the environmental assessment and operates without worries.

V. Conclusion

Copper slag is not a waste, but a misplaced resource. This copper dross sorting treatment and resource utilization solution will help you:

• Tap the potential to increase efficiency: extract the residual value from the waste copper dross, directly enhance the recovery rate of the main business.

• Reduce costs and emissions: Significantly reduce the cost of solid waste disposal, avoid environmental fines, and obtain potential carbon revenue.

• Transformation and upgrading: to create a "waste-free factory", shaping a green, recycling, sustainable development of the industry benchmark enterprises.

Facing the "urban mine" of copper slag, choosing the appropriate copper slag sorting and utilization technology is the key to realizing its value. We are willing to provide you with one-stop copper slag treatment service with our profound technical accumulation and rich project experience, and help you turn the environmental burden into green economic benefits and win-win development.