Refractory concrete production process

Properties of refractory concrete raw materials mainly depends on the material composition and particle composition of mines, is closely related with the manufacturing process of refractory materials.Refractory concrete this kind of properties mainly include the size and particle size distribution, fineness and specific surface area, plasticity and binding, drying shrinkage and sintering shrinkage, sintering temperature and sintering range.
1.Particle size and particle size distribution of refractory concrete
Particle size is the size of the refractory material.The particle size distribution is a continuous, different size range, the weight percentage of the level of granularity of particles. The particle size distribution of clay materials on its plasticity, drying performance, the burning performance has a great influence.The effect of particle size distribution on the bulk density, porosity, mechanical strength and thermal shock stability of refractory products is also very obvious.In order to obtain the stable quality of refractory materials, in addition to the chemical composition of raw materials are required, the particle size distribution should also be clearly defined.
Determination of particle size distribution of the commonly used screening analysis and particle analyzer. Analysis of dry sieving and sieving sieving method.Due to the limitation of mesh size, screen analysis suitable for coarse particles (>10 m) of the particle size distribution was determined.There are many methods to measure the specific surface area, such as gas adsorption, organic molecule adsorption and air permeability
2.Fineness and specific surface area of refractory concrete
Fineness represents the degree of fineness of the powder material, often expressed as a percentage or a specific surface area of the screen, or as a percentage of the particle size or the average diameter of the unit weight.There is no strict distinction between fineness and particle size, but the former is used to fine powder raw material thickness.
The quality of raw materials is refers to the unit surface area of the surface area, unit is m/g. specific surface area and the integral appearance of the internal surface area. The ideal non porous materials is only the appearance of the area; but with the appearance of the area is in addition to raw material porosity within and outside surface area. The surface area was measured for more commonly used gas adsorption of organic molecules, adsorption and permeability method.
3.Plasticity and binding of refractory concrete
When the material is subjected to external force, the deformation does not occur. After the external force is released, the shape of the deformation is retained and no longer returns to the original state.Plasticity refractory concrete is an important index of forming process of fire clay.The performance of plasticity of solid particles and water adsorption, the surface area and water content, such as clay, the adsorption water layer in the surface of clay particles, the particle is easy to slip under the action of external force, and have binding force, so it has high plasticity.Plasticity of refractory concrete was measured by plasticity index method and plasticity index method, and it was also measured by plastic moisture.Plasticity index refers to a plastic mud state, the variation range of water content, its value is equal to the liquid limit (liquid limit and plastic limit) (plastic limit) of the poor.The liquid limit is in plastic state when the upper limit of mud water, when the water content is more than the liquid limit of clay, a semi solid state. The liquid limit and plastic limit of the difference in percentage is the plasticity index.
Forming performance of refractory concrete plasticity index. The method is to represent the mud mud processed into 45mm diameter sphere, placed in plastic instrument, with gravity compression to the cracks began to appear.

Taurus Refractory ramming mass Factory mainly engaged in professional manufacturer of development, production and sales of the refractory mixture such as melting copper, aluminum and zinc furnace lining. And supply castable refractory for copper smelting, ramming mass for molten copper,fire clay,refractory mortar, refractory cement ,refractory mixture, refractory concrete and silica sand for copper smelting.
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