Did your cement plant invest a Particle Size Analyzer?

Article by Nguyễn Vũ Hoàng Duy at 15.01.2023

Did your cement plant invest a Particle Size Analyzer?

HELOS and RODOS - a good combination of Sympatec Laser Diffraction Sensor and Dry Dispersing System to control quality of Cement and Raw Meal at any cement plant laboratory.

Industrial, business or residential buildings, arenas, traffic routes or infrastructure projects – contemporary architecture with its modern buildings is unimaginable without cement-bound materials. As a versatile and permanent binder for concrete, plaster, mortar or screed, cement is one of the most important and mostly used building materials worldwide. By addition of water, cement turns into cement paste, which hardens through hydration to durable cement stone. The cement industry faces challenges such as assurance of consistent, grade-specific quality and furthermore energy and resource efficiency.

Why do a cement plant need a Particle Size Analyzer?

  • Optimization of process control through prompt monitoring of grinding fineness of raw meal and cement
  • Faster availability of results for quality and process control
  • Assurance of a consistently high product quality
  • Reduction of energy consumption by avoiding overgrinding
  • Maximum utilization of raw materials
  • Decrease of out-of-spec material during type changes
  • User-independent, fast and reliable measuring results
  • Outstanding reproducibility of measuring results and comparability of system-to-system or location-to-location

Sympatec Laser Diffraction Sensor HELOS and Dry Disperser RODOS for cement application

While traditional procedures of fineness measurements, like sieving or the determination of cement powder’s specific surface using the Blaine-device, only deliver single values after time-consuming analyses, laser diffraction analysis evaluates the entire grain size distribution in high resolution without operator influence. The grinding grade, too high or too varying fine content (< 2 µm) or coarse content are detected reliably and promptly. With a powerful dry dispersion, laser diffraction offers an unrivalled sensitivity and high reproducibility over the entire cement particle size range with user-independent measurements in a matter of seconds.

The system configuration

HELOS/BR - The most simple version of the Sympatec HELOS Laser Diffraction Sensors and finds room on every laboratory table. It integrates up to 5 optical modules for a measuring range from below 0.1 µm to 875 µm. A multitude of measuring tasks are fulfilled reliably and offers measuring confidence even to the coarser particle range. The laser analyzer can be used with all HELOS dispersing units. RODOS - Dry dispersing unit with compressed air and particle accelerations of up to 100 m/s, achieves unique dispersion performance for powder, fibres and granulates, ranging from under 0.1 um to 4,000 um. Sample quantities of under 1 mg to 1,500 g are reliably and reproducibly dispersed. Statistically significant analyses are achievable with sample volumes of up to 1,000 ml, even with widely distributed particle systems. The accelerated individual particles are supplied to the HELOS laser diffraction or QICPIC image analysis measurement zone in the aerosol open jet, and precisely measured. VIBRI - Precise dosing and supply of particle system from miligram to kilogram with contant sample mass-flow.

The result

Cement | 5 repetitions

Micro cement | 3 repetitions

Raw meal | 3 Repetitions

The Benefits

Precise and fast control of the particle size distribution guarantees for

  • Consistent product quality
  • Optimum process operation by continuous control of fineness for cement and raw meal
  • Maximum yield from raw materials
  • Reduction of energy consumption