Sulfonated and Hydroxy Fatty Acid Sparge for Phosphate Flotation
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Solution Overview
Problem
Froth flotation processes for phosphate ores face challenges in achieving high yields and purity while minimizing excessive frothing, which can lead to reduced recovery and handling issues due to the use of sulfonated fatty acids.
Innovation Solution
A sparge composition comprising a comminuted phosphate ore, a sulfonated fatty acid composition, and a hydroxy fatty acid composition is used in reverse froth flotation, optimizing the ratio and pH to enhance phosphate recovery and grade without excessive frothing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sulfonated fatty acids are used as collectors in reverse froth flotation, then phosphate recovery is improved, but excessive frothing occurs leading to reduced recovery and handling issues
Solution Approach 1:
The patent modifies the chemical composition parameters by combining sulfonated fatty acids with hydroxy fatty acids in specific ratios (0.1:1 to 10:1). This parameter change alters the froth characteristics and collector effectiveness, resolving the contradiction between recovery improvement and excessive frothing by optimizing the chemical composition to achieve balanced performance.
Solution Approach 2:
The patent creates a composite collector system by combining two different fatty acid types (sulfonated and hydroxy) into a unified reagent mixture. This composite approach leverages the complementary properties of each component: sulfonated fatty acids provide strong phosphate attachment while hydroxy fatty acids moderate froth formation, together achieving improved recovery without excessive frothing.
2Reliability
If the ratio of sulfonated fatty acid to hydroxy fatty acid is increased, then collector effectiveness is improved, but froth stability and handling become problematic
Solution Approach 1:
The patent establishes an optimal parameter range for the sulfonated to hydroxy fatty acid ratio (0.1:1 to 10:1, preferably 1:1 to 1:10). Within this parameter range, collector effectiveness is maintained while froth handling becomes manageable. This parameter optimization resolves the contradiction by identifying the sweet spot where both reliability and ease of operation are satisfied.
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 proposed method improves the purity and yield of phosphate recovery in reverse froth flotation, achieving better separation efficiency and reducing downstream processing issues.
Implementation Method 1
The role of a collector is to assist the flotation of targeted particles in the sparge composition
Implementation Method 2
In a process known as sparging, a gas, typically air, is bubbled through the sparge composition, and a froth forms at the surface of the sparge composition. During sparging, some materials from the ore such as targeted particles are carried up with the gas bubbles (i.e. floated) and concentrate in the froth
Implementation Method 3
bubbles of which rise up out of the slurry carrying hydrophobic particles therewith and form the froth layer above the underflow
Implementation Method 4
The sparge composition is sparged with the gas, bubbles of which rise up out of the slurry carrying hydrophobic particles therewith and form the froth layer above the underflow
Data Source
AI summary
Improved sparge compositions for reverse froth flotation separation and uses thereof, and improved methods of reverse froth flotation are described. Described are sparge compositions comprising collectors and beneficiating agents, the collectors comprising sulfonated fatty acids and/or salts thereof, and the beneficiating agents comprising a hydroxy fatty acid composition. The sparge compositions are suitably used in the reverse froth flotation to separate phosphate beneficiary from ores comprising phosphate and dolomite, calcite, silicate, and/or other gangues. The disclosed compositions and methods exhibit improved separation of phosphate from such ores.