Dry PVOH Binder Composition for Stronger Mineral Briquettes
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Solution Overview
Problem
Existing binder solutions for stabilizing powdered minerals, such as PVOH, face challenges in transportation and handling due to high shipping costs for pre-solubilized forms and the need for on-site dissolution, which complicates processing and reduces mechanical strength and moisture resistance.
Innovation Solution
A PVOH-based binder composition using granules with specific particle size distribution, molecular weight, and hydrolysis degree, mixed with powdered minerals and water to form briquettes without pre-solubilization, enhancing mechanical strength and moisture resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If pre-solubilized PVOH formulations are shipped, then binding effectiveness is improved, but shipping costs increase due to added water weight
Solution Approach 1:
The invention extracts and removes the water component from the PVOH formulation, shipping only the dry PVOH resin granules instead of pre-solubilized solutions. This eliminates the unnecessary water weight during transportation while allowing the PVOH to be dissolved on-site at the appropriate concentration, thereby resolving the contradiction between binding effectiveness and shipping weight.
Solution Approach 2:
The PVOH is prepared in advance as dry resin granules with controlled particle size and molecular weight, which are then dissolved on-site before use. This preliminary preparation in dry form allows for efficient shipping while maintaining the ability to achieve effective binding concentrations when needed, resolving the contradiction between shipping efficiency and binding effectiveness.
2Weight of moving object
If PVOH is shipped as dry resin requiring on-site dissolution, then shipping costs are reduced, but processing complexity increases due to need for stirring or cooking apparatus
Solution Approach 1:
The invention optimizes parameters of the dry PVOH resin including particle size distribution (0.4-4.0 mm) and molecular weight (15,000-210,000 g/mol) to achieve a balance between shipping efficiency and dissolution characteristics. These parameter optimizations enable effective binding performance while reducing the complexity of on-site processing equipment needed.
3Strength
If PVOH is used to enhance mechanical strength, then briquette integrity is improved, but moisture resistance may be compromised
Solution Approach 1:
The invention optimizes the molecular weight (15,000-210,000 g/mol) and particle size distribution (0.4-4.0 mm) of PVOH granules to achieve a balance between mechanical strength and moisture resistance. These parameter optimizations enable the PVOH to form strong bonds while maintaining adequate moisture resistance in the resulting briquettes.
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 method produces briquettes with improved structural integrity and moisture resistance, meeting or exceeding industry standards for compressive strength and durability, while eliminating the need for pre-solubilized PVOH and reducing processing complexity.
Implementation Method 1
PVOH granules having a particle size distribution of less than 420 μm... mixing PVOH granules with powdered minerals and water to form briquettes
Implementation Method 2
binders to transform the powdered material into briquettes... promote cohesion among powdered particles
Implementation Method 3
mixing PVOH granules with powdered minerals and water to form a homogeneous slurry
Data Source
AI summary
A slurry composition suitable for forming powdered mineral briquettes is disclosed. The composition comprises 4 wt % to 20 wt % of polyvinyl alcohol (PVOH) granules having a particle size distribution of less than 420 μm, 5 wt % to 9 wt % water, and the remainder comprising at least one powdered mineral. The composition may optionally include one or more additives. The total composition is 100 wt %, and the PVOH granules are added in dry form, without prior solubilization. Briquettes formed from the disclosed slurry exhibit improved green strength and compressive strength suitable for industrial handling and transport.