Hydroxamic Acid-Metal Hydroxide Complex for Tungsten Ore Flotation
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Solution Overview
Problem
Current collectors for oxide ores such as tungsten, cassiterite, and rutile suffer from low selectivity and high costs due to their inability to effectively differentiate between target minerals and gangue minerals, leading to inefficient separation and resource utilization.
Innovation Solution
A hydroxamic acid-metal hydroxide coordination complex is developed, formed by the coordination of hydroxamic acid with divalent or higher valent metal ions under alkaline conditions, which enhances the content of effective ingredients with collection ability for minerals like tungsten, cassiterite, and rutile, and is applied through a carrier adsorption-foam floatation method for purification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional anionic collectors such as fatty acid and chelating collectors are used for oxide ore flotation, then the collection process can be performed, but the selectivity between target minerals and gangue minerals is insufficient
Solution Approach 1:
The patent changes the chemical parameters of the collector by using hydroxamic acid-metal hydroxide coordination complexes with specific metal ions (Fe3+, Al3+, Mn2+, Zn2+, Pb2+, Ca2+) and controlling pH conditions (8-12) to enhance selectivity for oxide minerals over calcium-containing gangue minerals
Solution Approach 2:
The patent creates composite collector systems by combining hydroxamic acid with various metal hydroxides to form coordination complexes, where the metal ion acts as a central atom coordinating with hydroxamic acid ligands, producing a composite material with enhanced selective flotation capability
2Productivity
If traditional floatation agents are used, then mineral separation can be achieved, but the cost is high and resource utilization rate is low
Solution Approach 1:
The patent employs hydroxamic acid-metal hydroxide coordination complexes that can be prepared from inexpensive raw materials (hydroxamic acid and metal salts) and used effectively at low concentrations (10-50 g/t), reducing both material cost and consumption rate compared to traditional collectors
3Reliability
If collectors act on both useful minerals and calcium-containing gangue minerals through calcareous points, then collection occurs, but selectivity deteriorates
Solution Approach 1:
The patent achieves local quality differentiation by designing collectors with specific functional groups (hydroxamic acid coordinated with metal hydroxide) that have affinity for oxide mineral surfaces while being inhibited from adsorbing on calcium-containing gangue minerals under alkaline conditions (pH 8-12), thus creating selective action at specific mineral sites
4Quantity of substance
If the grade of ore decreases and gangue content increases, then resource reserves increase, but separation difficulty increases
Solution Approach 1:
The patent addresses low-grade ore separation by adjusting key parameters: using hydroxamic acid-metal hydroxide coordination complexes at optimized concentrations (10-50 g/t), controlling pH in the range of 8-12, and selecting appropriate metal ions based on target mineral characteristics, thereby achieving effective separation even with 70-80% gangue content
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
The hydroxamic acid-metal hydroxide coordination complex demonstrates strong selectivity and collection ability, significantly improving the recovery rate and reducing costs, with an enrichment ratio of tungsten-containing minerals up to 50 times and a recovery rate higher than 85%, while simplifying the preparation process and reducing energy consumption.
Implementation Method 1
formed by the coordination of hydroxamic acid with divalent or higher valent metal ions under alkaline conditions
Implementation Method 2
applied through a carrier adsorption-foam floatation method for purification
Implementation Method 3
The hydroxamic acid-metal hydroxide coordination complex demonstrates strong selectivity and collection ability, significantly improving the recovery rate
Data Source
AI summary
A hydroxamic acid-metal hydroxide coordination complex and preparation and application thereof are disclosed. The hydroxamic acid-metal hydroxide coordination complex is formed by a coordination of hydroxamic acid with divalent or higher valent metal ions under an alkaline condition. The hydroxamic acid-metal hydroxide coordination complex has a strong selectivity and a strong collection ability for metal oxide minerals such as tungsten-containing minerals, ilmenite, rutile, cassiterite, and rare earth. The preparation method is simple and low in costs, and is beneficial to industrialized production.