Particle Size Detection Method And Application Range Of White Corundum Abrasive

White corundum abrasive is a kind of artificial abrasive, its production method is very complex, made of special smelting process, and then through grinding and shaping, magnetic separation to iron and other processes, screening into a variety of particle size, the white corundum particle size how to detect it? Here is a specific summary to explain the introduction of several methods:

(1) Screening method. Advantages: simple, intuitive, low equipment cost, often used for samples greater than 40um. Disadvantages: The result is greatly affected by human factors and sieve deformation.

(2) Microscope (image) method. Advantages: Simple, intuitive, morphologic analysis, suitable for narrow distribution (maximum to minimum particle size ratio of less than 10:1) of the sample. Disadvantages: poor representation, analysis of samples with a wide distribution range is more troublesome, and samples less than 1um can not be analyzed.

(3) Settlement method (including gravity settlement and Lixin settlement). Advantages: gradual operation, continuous operation of the instrument, low price, good accuracy and repeatability, a wide range of tests. Disadvantages: The test time is longer and the operation is more complicated.

(4) Resistance method. Advantages: The number of particles can be measured in the gradual operation, the equivalent concept is clear, the speed is fast, and the accuracy is good. Disadvantages: It is not suitable for measuring particle samples less than 0.1um, and it is troublesome to replace small hole tubes for samples with wide particle size distribution.

(5) Laser method. Advantages: simple operation, fast test speed, wide test range, good repeatability and accuracy, online measurement and dry measurement. Disadvantages: The result is greatly affected by the distribution model, the cost of the instrument is high, and the resolution is low.

(6) Electron microscopy. Advantages: suitable for testing ultra-new particles or even nanoparticles, high resolution, morphology and structure analysis can be carried out, disadvantages: small samples, poor representation, measurement is susceptible to human factors, and the instrument is expensive.

(7) Photoresistance method. Advantages: convenient and fast test, can measure the number of particles in liquid or gas, high resolution. Disadvantages: not suitable for samples with particle size less than 1umde, the system is more particular, only suitable for measuring dust, pollutants or drugs that have been diluted, and not much for general powder.

(8) Breathable method. Advantages: Low instrument price. The material powder can be measured without dispersing the sample. Disadvantages: only the average particle size can be obtained, and the particle size distribution can not be measured; Do not measure less than 5um fine powder.

(9) X-ray small Angle scattering method. Used for particle size measurement of nano-scale particles.

(10) Photon correlation spectroscopy (dynamic light scattering method). Used for particle size measurement of nano-scale particles.

White corundum abrasives are made of bauxite and graphite electrode, and are produced by new ultrafine powder technology. During production, raw materials need to be added and stirred, formed, and fired at high temperature. The use characteristics of white corundum: high refractoriness, stable performance at high temperature, no burst. It does not powder. Corrosion resistance, high hardness, but also has a certain toughness. White corundum is suitable for all kinds of refractory materials in high temperature production. It is widely used in the surface grinding of chemical, glass and various metal materials, and can also be used in the filtration of water quality.