Segmented Sieve Bend with Hard Chrome Coating for Wear Resistance
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Solution Overview
Problem
Existing sieve bends in mining operations face inefficiencies in media recovery and wear resistance, leading to significant losses and high costs due to the abrasive nature of the slurry and the need for increased open area without enlarging slot sizes, which compromises classification efficiency and operating life.
Innovation Solution
A sieve bend design featuring a central screening segment with narrower screening elements and wider elements on opposed sides, treated with a hard chrome coating for increased wear resistance, providing a higher total open area and improved impact resistance by varying the head widths of screening elements and using a cradle for rotational maintenance to extend the sieve bend's operational life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the open area of the sieve bend is increased to improve media recovery efficiency, then the efficiency of the sieve bend is improved, but the slot size would need to be increased which results in larger particles passing through the screening slots causing loss of recoverable solids
Solution Approach 1:
The screening surface is divided into multiple segments with different screening element configurations. The first segment has narrower screening elements while subsequent segments have wider screening elements, allowing each segment to perform specialized functions that collectively improve media recovery without losing recoverable solids
Solution Approach 2:
Different regions of the screening surface are assigned different properties - the first segment has narrower screening elements for high media recovery while subsequent segments have wider elements for particle retention, optimizing both media recovery efficiency and prevention of solid loss in different locations
2Area of stationary object
If the slot size is increased to increase open area, then the open area is increased, but larger particles pass through the screening slots resulting in excessive proportion of recoverable solids being lost
Solution Approach 1:
The screening surface is divided into multiple segments with different screening element configurations. The first segment has narrower screening elements while subsequent segments have wider screening elements, allowing each segment to perform specialized functions that collectively improve media recovery without losing recoverable solids
Solution Approach 2:
Different regions of the screening surface are assigned different properties - the first segment has narrower screening elements for high media recovery while subsequent segments have wider elements for particle retention, optimizing both media recovery efficiency and prevention of solid loss in different locations
3Productivity
If the sieve bend operates in abrasive slurry conditions, then the screening process functions, but the operating life of the sieve bend is reduced due to wear from slurry impact
Solution Approach 1:
The screening elements undergo hard chrome plating treatment that changes their surface properties, providing a wear-resistant coating that maintains the screening function while significantly extending the operating life of the sieve bend in abrasive slurry conditions
Solution Approach 2:
The screening elements combine base material with a hard chrome coating layer, creating a composite structure that provides both the structural integrity needed for screening function and the wear resistance required to extend operating life in abrasive conditions
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 design enhances media recovery, reduces losses, and extends the sieve bend's operational life by maintaining classification efficiency and wear resistance, resulting in significant cost savings for mining operations while maintaining the effectiveness of the screening process.
Implementation Method 1
The at least one further screening segment may be treated to provide increased wear resistance. The at least one further screening segment may be treated by being coated with a wear resistant coating. For example, the screening elements of the at least one further screening segment may be hard chromed to provide increased wear resistance.
Implementation Method 2
Sieve bends are used to separate solids from a carrier medium in a slurry flowing over a screening surface of the sieve bend. As the slurry flows over the inclined screening surface, solids are retained on, and pass along, the screening surface while liquid and other entrained particles of the carrier medium as well as undersized particles pass through the screening slots of the sieve bend.
Data Source
AI summary
A sieve bend can include a support structure supporting a screening arrangement. The screening arrangement can include a first screening segment having a first screening element configuration and at least one further screening segment having a second screening element configuration different from the first screening element configuration.