Cement Production Infrared Monitoring for Sulfate Control
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Solution Overview
Problem
Cement manufacturing faces challenges in achieving consistent quality and reducing carbon footprint due to variability in raw materials, processing conditions, and sulfate levels, leading to inconsistent cement strength and increased carbon dioxide emissions.
Innovation Solution
Implement a method and system for monitoring and adjusting sulfate and cement additive levels, cement fineness, and other factors using sensors and a closed-loop framework to optimize cement strength and reduce variability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If expensive process controls are implemented, then manufacturing precision may improve, but reliability of consistent quality remains poor due to high variability of raw materials and processing conditions
Solution Approach 1:
The patent implements a closed-loop feedback system that continuously monitors sulfate levels in the cement mill and automatically adjusts the gypsum feed rate accordingly. This real-time feedback mechanism enables the system to compensate for variations in raw materials and processing conditions, maintaining consistent cement quality despite external uncertainties.
Solution Approach 2:
The system dynamically adjusts the sulfate level parameter by controlling the gypsum feed rate based on real-time measurements. This parameter change approach allows the process to adapt to varying conditions while maintaining the target sulfate concentration, thereby ensuring consistent cement quality.
2Productivity
If sulfate levels are not controlled, then productivity may be higher, but manufacturing precision of cement strength deteriorates
Solution Approach 1:
The automated feedback control system monitors sulfate levels continuously and adjusts gypsum feed rate in real-time, enabling the system to maintain precise sulfate control without reducing production rate. This eliminates the need for manual interventions that would slow down productivity while ensuring consistent cement strength.
Solution Approach 2:
The system is self-regulating through automatic control algorithms that adjust the gypsum feed rate based on real-time sulfate measurements. This self-service capability allows the process to maintain precise sulfate levels and consistent cement strength without external intervention, preserving both productivity and manufacturing precision.
3Device complexity
If traditional monitoring methods are used, then device complexity remains low, but measurement precision of sulfate levels and cement properties is insufficient
Solution Approach 1:
The patent replaces traditional mechanical sampling and laboratory analysis methods with non-contact infrared spectroscopy. This substitution uses optical fields to directly measure sulfate levels in the cement mill, achieving high measurement precision without the complexity of mechanical sampling systems and manual laboratory procedures.
Solution Approach 2:
The system creates a spectral copy of the cement material's infrared signature to determine sulfate levels. By analyzing the infrared spectrum rather than physically sampling the material, the system achieves precise measurements while minimizing device complexity and avoiding intrusive measurement methods.
4Manufacturing precision
If frequent adjustments of sulfate and additives are made, then manufacturing precision of cement strength improves, but device complexity and automation requirements increase
Solution Approach 1:
The closed-loop feedback system automatically adjusts sulfate levels based on real-time measurements, eliminating the need for complex manual control procedures. The automated feedback mechanism handles frequent adjustments through simple control algorithms, achieving high manufacturing precision without proportionally increasing device complexity.
Solution Approach 2:
The system performs self-adjustment through automatic control that responds to real-time sulfate measurements. This self-service capability enables frequent adjustments to maintain precise cement strength consistency without requiring complex external control systems or manual intervention, thereby limiting the increase in device 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
Achieves consistent cement quality and reduces carbon footprint by frequently adjusting sulfate and additive levels, enhancing strength and efficiency in cement production.
Implementation Method 1
providing an infrared sensor system and detecting absorption or reflectance of energy by or through the ground particles
Implementation Method 2
laser diffraction sensor system, and detecting absorption or reflectance of energy by or through the ground particles
Data Source
AI summary
The present invention provides a method and system for manufacturing cement wherein ground particles of cement and calcium sulfate are subjected to infrared sensors, laser sensors, or both, so that emanated, irradiated, transmitted, and/or absorbed energy having wavelengths principally within the range of 700 nanometers to 1 millimeter can be monitored and compared to stored data previously obtained from ground cement and sulfate particles and preferably correlated with stored strength, calorimetric, or other data values, such that adjustments can be made to the mill processing conditions, such as the form or amounts of calcium sulfate (e.g., gypsum, plaster, anhydride), or cement additive levels. The strength and other properties of cement can be thus adjusted, and its quality can be more uniform.