Bone porcelain kiln, choose 1

Bone kilns of materials in order to burn osteogenesis porcelain products and use of sagger, shed board, column and beam on the kiln refractory supports are collectively referred to as kiln furniture. Ceramic industry kiln furniture is important auxiliary materials, the quality of bone China products and cost plays an important role. Kiln kiln with bone China products, in the bone and bone porcelain kilns in body were also heating and cooling, and a support role, especially in high temperature bearing, even when the process is repeated many times, to keep the intensity and neat degree, therefore, the bone kilns with high requirement of material. Performance requirements for bone kilns with ( 1) High refractoriness refractoriness is material resistant to high temperature in the absence of load effect and not the nature of the melt, bone kilns refractoriness than general products of high sintering temperature above 300 ℃. ( 2) Good thermal stability of refractory resistance degree of dramatic change and not destroy the performance of the called thermal stability. No matter what kind of bone porcelain kiln, bone kilns are after many cold, so have good thermal stability. Factors influencing the thermal stability of the main is material coefficient of thermal expansion coefficient, thermal conductivity, elasticity and the shape of kiln furniture, thickness, grain size distribution, etc. Small expansion system, large thermal conductivity, thermal stability and the shape is simple, thin wall of kiln furniture. ( 3) High temperature and high temperature kilns, no matter what kind of bone mechanical strength to withstand forces of bone porcelain body and part of the kiln furniture. So, bone kilns have high mechanical strength, at high temperatures to have higher load softening resistance. General refractoriness under load than bone porcelain products of high sintering temperature 50 ~ 100 ℃, in order to make sure it won't produce high temperature deformation under load. ( 4) Good thermal conductivity and low heat storage good thermal conductivity, heat fast, good for heating up. Less heat, less heat, with less heat, less heat loss, energy-saving effect is good. ( 5) Better accuracy of bone China ( Bone China) Calcining kiln with good neat degrees, more strict size, like buckle burn sagger if the surface is rough, it's easy to cause bone porcelain product surface is uneven, even deformation of bone China, directly affect the quality bone porcelain products. Bone porcelain kiln furniture commonly used types of commonly used bone kilns at home and abroad with material basically has: clay clinker quality, high aluminum, silica alumina magnesia, silicon carbide and fused silica mass, etc. ( 1) Bone porcelain clay grog clay clinker quality, also known as aluminum silicate, using temperature at 1300 ℃, its composition is: the clinker 40% ~ 60%, 60% ~ 40% of clinker clay is commonly: calcined kaolin, calcined burnt stones, sagger waste after burning mineral phase composition of mullite and cristobalite, free silica, glass phase and porosity, etc. Bone porcelain saggar, pay attention to the grain size distribution, do big sagger, coarse particles to some; Do small. ( 2) Bone porcelain high aluminum high aluminum refractory refers to Al2O is higher than that of pure kaolinite calcined alumina coarse particle after dehydration less dosage in more than 46% of refractory material. When the material aluminum content in 62% ~ 72%, called the mullite stone 72% ~ 90% when called mullite Shi Gang jade, just the jade is higher than 90% when called. ( 3) Bone China magnesium aluminium siliceous in material adding talc, serpentine, sepiolite, or chlorite containing magnesite materials produced in the material, smaller expansion coefficient of cordierite crystals can improve bone kilns material thermal stability, thus improve the service life. This kind of refractory belongs to magnesium aluminium siliceous refractory material. According to the content of shi mo to rocky, cordierite, cordierite clinker quality, etc. — Tangshan bone bowls to be continued. 。 。 。 。 。