Mixed Collector Compositions for Iron Ore Silicate Flotation
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Solution Overview
Problem
Current collector compositions for silicate flotation in iron ore beneficiation exhibit inadequate selectivity and yield, leading to reduced quality of iron ore concentrates due to high silicate content.
Innovation Solution
A collector composition comprising a combination of amidoamines and etheramines, specifically formulated to enhance the recovery of iron by forming a hydrophobic monolayer on mineral surfaces, thereby improving the selectivity and yield of silicate flotation, with a weight ratio of amidoamine to etheramine ranging from 99:1 to 1:99.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional collectors (alkyl ether amines and alkyl ether diamines) are used for silicate flotation, then the flotation process can be performed, but the selectivity and yield are inadequate resulting in high silicate content in the iron ore concentrate
Solution Approach 1:
The patent combines amidoamines and etheramines in a mixed collector composition to achieve both high selectivity and high yield in silicate flotation. The composite collector system leverages the complementary properties of amidoamines (which provide high selectivity for silicates) and etheramines (which provide good flotation performance and yield), resolving the contradiction between manufacturing precision and productivity
Solution Approach 2:
The patent optimizes the weight ratio of amidoamine to etheramine in the collector composition to achieve the best balance between selectivity and yield. By adjusting the concentration and ratio of collector components, the patent maximizes both the separation quality and the recovery efficiency, transforming the inadequate performance of conventional single collectors into superior dual-function performance
2Device complexity
If conventional collectors are used for silicate flotation, then the process is simple, but the quality of iron ore concentrate is reduced due to high silicate content
Solution Approach 1:
The patent employs a composite collector system combining amidoamines and etheramines to achieve high-quality iron ore concentrate with low silicate content. The synergistic interaction between the two collector types enhances the flotation selectivity, allowing for effective silicate removal and production of high-grade concentrate, thereby improving manufacturing precision through material composition rather than process complexity
3Productivity
If amidoamines and etheramines are used in combination, then iron recovery increases by up to 7%, but the collector composition becomes more complex
Solution Approach 1:
The patent merges amidoamines and etheramines into a unified collector composition that works synergistically to enhance iron recovery. The combined system achieves up to 7% higher iron recovery compared to single collectors by leveraging the complementary mechanisms of both collector types: amidoamines provide strong selective attachment to silicate surfaces while etheramines facilitate bubble attachment and froth formation, together resolving the contradiction between improved productivity and increased complexity
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 use of amidoamines and etheramines in the collector composition increases iron recovery by up to 7% compared to using either component alone, resulting in a high-grade iron concentrate with reduced silicate content, thereby improving the quality of iron ore concentrates.
Implementation Method 1
certain heteropolar or nonpolar chemicals called collectors are added to an aqueous slurry containing the mineral(s) to be separated or purified. These chemicals are designed to selectively attach to one or more of the minerals to be separated, forming a hydrophobic monolayer on their surfaces.
Implementation Method 2
The formation of the hydrophobic monolayer makes the minerals more likely to attach to air bubbles upon collision. The mass of the combined air bubble/mineral particles is less dense than the displaced mass of the pulp, which causes the air bubble/mineral particles to float to the surface
Implementation Method 3
The mass of the combined air bubble/mineral particles is less dense than the displaced mass of the pulp, which causes the air bubble/mineral particles to float to the surface where they form a mineral-rich froth that can be skimmed off from the flotation unit, while the other minerals remain submerged in the pulp.
Data Source
AI summary
Collector compositions and methods for making and using same are provided. The collector can include one or more etheramines and one or more amidoamines. A liquid suspension or slurry comprising one or more particulates can be contacted with the collector to produce a treated mixture. A product can be recovered from the treated mixture that includes a purified liquid having a reduced concentration of the particulates relative to the treated mixture, a purified particulate product having a reduced concentration of liquid relative to the treated mixture, or both.