Study on the Intelligent Laser Instrument of Cement Particle Size Measurement

The sample preparation of particle size measurement is divided into wet and dry dispersion respectively. The wet dispersion method includes rabbling, ultrasonic and dispersant, and has been already basically ripe. The dry dispersion only has flow velocity and gas pressure, whose sample preparation is more difficult than the wet dispersion. But because the cement is water-solubility, the dry dispersion technology is the only method to use. The laser diffraction and Mie scattering theory model were discussed in the paper. The dry dispersion suspension principle and multiple scattering were also stated briefly. In order to meet actual demands, the analysis instrument was furnished with the "particle analysis expert" software system. The measuring range of the dry cement laser particle instrument is 0.1~600 micron. Its measuring time is less than 30 seconds. According to experimental result, the instrument has many application advantages such as high accuracy, good repeatability, quick testing speed and so on