Sulphide Ore Pre-treatment for Soluble Metal Extraction
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Solution Overview
Problem
Current metal extraction processes, such as leaching and flotation, are inefficient for processing sulphide minerals, resulting in low recovery rates and environmental liabilities from waste residues, with a lack of commercially viable methods for extracting multiple chemical elements simultaneously.
Innovation Solution
A method involving the injection of an electron flow to manipulate the electronic structure of materials, making them highly soluble in water, allowing for the simultaneous extraction of multiple chemical elements through a pre-treatment solubilization process that reduces processing cycles and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If leaching process is used to extract metals from sulphide minerals, then low investment and operating costs are achieved, but extraction performance is low and processing cycle is long
Solution Approach 1:
The patent applies parameter changes by modifying the chemical environment through pH adjustment and redox potential control to enable effective leaching of sulphide minerals. By changing these parameters, the refractory sulphide matrices become soluble, dramatically improving extraction performance while maintaining the cost advantages of leaching processes.
Solution Approach 2:
The patent employs preliminary action by conducting a pre-treatment solubilization step before the main leaching process. This preliminary action dissolves the refractory sulphide matrices, making the subsequent extraction of base and precious metals much more efficient and reducing the overall processing cycle time.
2Productivity
If flotation-fusion-conversion process is used to extract metals from sulphide ores, then speed of production and efficiency to obtain concentrates are improved, but energy consumption is high and pollution potential is high
Solution Approach 1:
The patent replaces the mechanical and thermal processes of flotation-fusion-conversion with a chemical leaching process. Instead of using mechanical grinding, flotation, and high-temperature fusion, the invention uses chemical solubilization to extract metals directly from sulphide ores, dramatically reducing energy consumption and eliminating associated pollution while maintaining high productivity.
Solution Approach 2:
The patent changes the fundamental parameters of the extraction process by using controlled chemical environments (pH, redox potential) instead of mechanical and thermal energy inputs. This substitution maintains efficient metal recovery while eliminating the high energy consumption and pollution associated with traditional flotation-fusion-conversion processes.
3Quantity of substance
If leaching process is used for metal extraction, then acid consumption is medium or high, but recovery rate is only 70-80%, and solid residue SPENT ORE is generated
Solution Approach 1:
The patent optimizes parameter changes by precisely controlling pH and redox potential to maximize metal solubilization. This enables near-complete recovery of base and precious metals from sulphide minerals, dramatically improving recovery rates from 70-80% to over 95% while reducing acid consumption through more efficient chemical utilization.
Solution Approach 2:
The preliminary solubilization treatment dissolves the refractory sulphide matrices that normally protect metals from extraction. This preliminary action ensures that subsequent leaching efficiently recovers nearly all metals, minimizing residual waste and reducing the quantity of acid needed to achieve high recovery rates.
4Device complexity
If conventional leaching is applied to sulphide minerals, then the process is simple, but dissolution of refractory species is ineffective
Solution Approach 1:
The patent maintains process simplicity while dramatically improving dissolution effectiveness by controlling key parameters (pH and redox potential). These parameter changes enable the simple leaching process to effectively dissolve refractory sulphide species that are normally resistant to conventional leaching, achieving both simplicity and high effectiveness.
Solution Approach 2:
The patent adds a preliminary solubilization step that specifically targets refractory sulphide matrices. This preliminary action prepares the material for effective leaching without complicating the overall process, maintaining operational simplicity while enabling complete dissolution of previously resistant species.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method achieves high recovery rates (>85%) with reduced energy consumption and operating costs, enabling the efficient extraction of multiple chemical elements from a wide range of materials, including sulphide minerals, and optimizes the revaluation of environmental liabilities.
Implementation Method 1
A method involving the injection of an electron flow to manipulate the electronic structure of materials, making them highly soluble in water
Data Source
AI summary
A method for extracting base and precious metals, all contained in refractory minerals, using aqueous media. The method includes mixing the mineral (Cu2S, CuS, CuFeS2, Cu5FeS4, FeS2, FeAsS.NiS, (Ni,Fe)xSy), ground to an appropriate size (2.5 centimetres), with a specific dose of solid reagent in a rotary agglomeration drum and then adding slightly acidified water to obtain a defined water content (5-8%) depending on the type of gangue contained in the metal-containing solid, thereby forming an agglomerate that will form a heap, which is subsequently allowed to stand for a period of several days (20-60 days), during which the conditions required to transform the refractory matrix into a highly soluble solid will be generated. Finally, appropriately regulated irrigation is applied, thus resulting in extraction of the metal by simple aqueous washing.