Quality Control of Kiln Refractory Production

refractory material

Refractory is to ensure that the kiln to improve the efficiency of ceramic firing the most important supporting material. Refractory China materials are closely related to the energy saving and economic efficiency of enterprises. Therefore, in the design and construction of modern ceramic kilns, the standards of refractory products have been regarded as important as the production of high-grade products, and the technical standards have been set higher and stricter . In recent years, the domestic ceramic enterprises committed to using high technology to improve and develop high-tech refractory products, which effectively promoted the development of the entire ceramic industry. We see every major advance in the ceramic kilns, along with the improvement of the energy-saving effect of the refractory materials, and various new types of refractory materials have been leading the way. Must pay attention to and adopt advanced technology to strengthen the quality control of refractory products.
Advanced technology and quality control.
From the exterior view, refractory products used in ceramic kilns, the appearance of clean and tidy, high regularity, showing a good manufacturing process function. In addition, these refractory products have excellent physical and chemical properties and long service life. In batch kilns, the use of high-quality fiber refractories greatly improves the firing efficiency of batch kilns. In addition, the use of refractory fiber in kiln car reduces the weight of kiln car, improves the heat insulation effect, enhances the utilization of kiln, saves a lot of energy, and also greatly eliminates the environmental pollution. As early as a dozen years ago, a large number of intermittent kilns have been using ceramic fiber furnace lining, so that energy-saving effect of about 30% -35%. Tunnel kiln is made of hard materials as insulation layer, the other for the same material of different density of light brick masonry. Its coefficient of expansion is basically the same. It is estimated that the energy-saving effect can reach over 10% by the assembly-type light kiln car consisting of the slab vermiculite granule and fiber, making it an ideal kiln car. At present, there are two kinds of materials used in British and German ceramic kiln furniture (including sagger): one is suitable for cordierite material below 1320 ℃; the other one is suitable for high temperature use (1400 ℃ -1650 ℃ ) Mullite material. Cordierite materials used below 1240 ℃, the use of oxidizing atmosphere, the use of up to 400 to 500 times as much; mullite shelf (about 300 × 450 × 25mm), for high temperature reducing flame, 1420 ℃ continuous There is no problem with the use. The sagger produced from these two refractory materials shows excellent results regardless of the conditions.
Construction and sanitary ceramics kiln refractories used in refractory products, the production process requirements are very strict, especially the key ingredients into the raw materials such as iron and other harmful impurities control very strict. As the supply of raw materials to take a specialization, standardized production methods, and always ensure the consistency of the ingredients of refractory raw materials. Due to the improvement of machining accuracy, the particle size of the raw material is relatively small. When the hydraulic press is used for dry pressing or semi-dry pressing, the product has high dimensional accuracy. The slab-board refractory products with plate bending allowable value of one thousandths Two to four or so. Before leaving the factory, each board must undergo a rigorous special inspection. If the deformation reaches one-tenth, the model should be rectified in time. Molded good semi-finished products, through the vacuum device, placed in a flat frame drying. As a result of the rotary drying method, ceramic refractory products dry deformation rate is low. Sintered refractory products, a good degree of internal and external deformation and less. Here, the strict production process control technology and quality management system, product performance, energy saving, repeated use of the number of more difficult to break the reasons.

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Kiln refractory selection method

refractory material

1, kiln performance and thermal characteristics. Such as intermittent work of the furnace should use refractory brick china low heat capacity of the material.
2, the safe use of materials temperature, thermal conductivity system, high temperature strength, chemical stability.
3, the use of life.
4, investment costs and maintenance costs.
In general, heavy refractory materials are more focused on a certain technical performance indicators, such as high temperature stability, chemical stability, etc .; light insulation materials more pay attention to put into operation and comprehensive technical and economic indicators.
The selection of lightweight insulation materials, the general thermal conductivity is used insulation material (λ) furnace refractory suppliers and the cost per unit volume of insulation material (P) to determine the value of the product of "λΡ" the smaller the better. Thermal conductivity value is small, indicating insulation material insulation effect is good, low energy costs during operation. The low cost per unit volume of refractory China insulation material indicates that the investment cost is low and the investment economy is good. You can use the graph plotting diagram selection, abscissa for the working temperature, ordinate (λΡ) good plot, the material safe use of temperature interception of the curve of the material, select the technical and economic performance of the material.

More refractory:
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Email: sales@ruizhirefractory.com