Refractory bricks are closely related to the manufacturing process of refractory materials

The technological properties of refractory raw materials mainly depend on the mineral composition and particle composition of raw materials, which are closely related to the manufacturing process of refractory materials. These properties mainly include particle size and particle size distribution, fineness and specific surface area, plasticity and binding, drying shrinkage and sintering shrinkage, sintering temperature and sintering range, etc.

1. Particle size refers to the particle size of refractory raw materials. Particle size distribution (PSD) refers to the weight percentage of particles of each particle size level within the range of continuous and different particle size levels (expressed in mm, um or sieve mesh). The particle size distribution of clay raw materials has a great influence on its plasticity, drying performance and firing performance.

2. The particle size distribution of raw materials also has an obvious effect on the bulk density, porosity, mechanical strength and thermal shock stability of refractory products. In order to obtain refractory with stable quality, in addition to the requirements for the chemical and mineral composition of raw materials, there should also be clear requirements for the particle size distribution.

3. The particle size distribution is usually determined by sieve analysis and particle analyzer. Screening analysis includes dry screening and water screening. Due to the limitation of screen aperture, screening analysis is suitable for the determination of particle distribution of coarser particles (> 10um). Particle analyzer is usually used to determine the size distribution of clay and differential fine particles.

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