Calcium Carbonate Production via Segmented Grinding
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Solution Overview
Problem
The existing method of producing natural inorganic materials like calcium carbonate pigments at a central location leads to logistical inefficiencies and increased costs due to the need for multiple processing equipment and excess product storage and transportation.
Innovation Solution
A process involving preliminary grinding at a central location to achieve 10-30% particles < 2 microns, stabilization with a cellulose derivative, and further processing at multiple remote locations to achieve 75-90% particles < 2 microns, allowing for customized particle size distributions tailored to end-user needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If calcium carbonate is ground at a central location to produce multiple different end products, then various particle size distributions can be produced, but additional processing equipment and warehousing are required leading to increased costs
Solution Approach 1:
The grinding process is segmented into two stages: preliminary grinding at a central location to produce a standardized intermediate product, and secondary grinding at remote locations to produce final customized products. This segmentation allows a single central facility to serve multiple customers without requiring each customer to have full processing capability.
Solution Approach 2:
The preliminary grinding action is performed at a central location to create a standardized intermediate product with controlled particle size distribution (10-30% particles < 2 microns). This preliminary processing eliminates the need for each remote location to have complete processing equipment, as they only need to perform the final secondary grinding.
2Adaptability or versatility
If calcium carbonate is ground at a central location to produce multiple different end products, then various particle size distributions can be produced, but excess product transportation and storage are required introducing logistical inefficiencies
Solution Approach 1:
The production process is segmented between central and remote locations, allowing each location to process only the quantity needed for its specific customer. This eliminates the need to produce, store, and transport excess inventory that would be required if a single central location produced all products.
Solution Approach 2:
Each remote location performs secondary grinding to create locally customized products with specific particle size distributions tailored to individual customer needs. This local customization ensures that only the exact quantity and specification required by each customer is produced and transported, eliminating waste from excess inventory.
3Manufacturing precision
If preliminary grinding is performed to achieve 10-30% particles < 2 microns, then the material is stabilized and transported, but further grinding at remote locations is required to achieve 75-90% particles < 2 microns
Solution Approach 1:
The grinding process is segmented into preliminary grinding at the central location and secondary grinding at remote locations. The preliminary grinding achieves 10-30% particles < 2 microns, which is sufficient for stabilization and transport. The secondary grinding at remote locations achieves the final 75-90% particles < 2 microns, optimizing particle size distribution for specific customer applications.
Solution Approach 2:
Each remote location performs secondary grinding to achieve the specific particle size distribution (75-90% particles < 2 microns) required by its particular customer. This allows each location to customize the final product quality to match local customer needs while using the standardized intermediate product from the central location as a starting point.
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
This approach reduces processing equipment needs, minimizes excess product transportation, and lowers energy costs by deferring grinding to locations closer to end-users, while also reducing the amount of stabilizing agents and potential microbial degradation.
Implementation Method 1
stabilizing the first processed mineral suspension by adding a thickener including a cellulose derivative
Implementation Method 2
the mineral material is processed by grinding in step (a) to produce a first processed mineral suspension having a particle size distribution
Implementation Method 3
adding an aqueous solution to decrease the solids content of the stabilized processed mineral to a solids content ranging from about 20% to about 35%
Data Source
AI summary
Disclosed herein are methods for producing a particulate mineral material having a desired particle size distribution, including processing the mineral material at a first location, stabilizing the processed mineral, transporting the stabilized processed mineral to a second location; and further processing the stabilized processed mineral material at the second location to a desired particle size distribution.