Reasons of Why Furnace Built with Changxing Refractory Silica Ramming Mass can Get a Long Using Life

Based on our 30 years experience of medium frequency induction furnace ramming, we find that furnace lining materials quality plays an important role in prolonging furnace using life. It has the following aspects to be concerned.


Firstly, the lining materials should have good character.


1. High bulk density stability and high refractoriness under load, not easy to be melt or soften could make materials not easy to lose strength, appear crack and collapse.


2. Its high thermal shock resistance, good cold and high temperature crush strength could protect furnace wall from cracking and spalling well and could resist to steel liquid slag corrosion.


Secondly, the composition of the refractory material should be strictly controlled.


1. The materials impurities could form low melting point compound under high temperature, which will greatly reduces the materials’ refractoriness, meanwhile, the service life of crucible will greatly reduced. 2. For this lining materials, should have following standard: (SiO2):96.0% or higher; (Al2O3) 0.5% or less; (Fe2O3) 0.5% or less; (TiO2) 0.05% or less; (H2O) 0.5% or less. Thirdly, refractory material particle size ratio is the key element. 1. Reasonable ratio of particle size, can be easily formed high density refractory layer for the furnace, which will avoid in defects during using process.


2. Generally it has 3 types: Coarse, medium and fine. Ratio as bellow: 3.35 mm to 5 mm: 17%; 0.85 mm to 1.70 mm: 33%; 1.70 mm to 0.85 mm: 20%, 0.1 mm below: 33%.


Changxing Refractory supplies any customized silica ramming mass, we design products size based on your furnace drawing, should you have any needs or questions, please feel free to let us know!if you want to buy any refractory products ,you can contact us anytime.