Yingkou Ruizhi Refractories Co., Ltd.

Yingkou Ruizhi Refractories Co., Ltd. is a professional China manufacturer of refractory material for high temperature melting furnaces.Ruizhi Refractories supply main products are: Refractory material, refractory brick, refractory castable,refractory nozzle, ceramic fiber, fire brick, insulation material for converter, electric arc furnace, ladle, LF furnace, tundish, foundry ladle, torpedo ladle, etc. Ruizhi has established technical cooperation relationship with some refractory research institutions and universities. Ruizhi Refractories products have been exported to such as South Africa, Australia, Canada, Malaysia, Bangladesh, Iran, Saudi Arabia, UAE, Iraq, Pakistan, Philippines, Vietnam, Singapore, Tajikistan, Indonesia, South Korea, Sri Lanka, Nigeria, Kenya, Ethiopia, etc.

http://www.ruizhirefractory.com/
Email: sales@ruizhirefractory.com

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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Refractory Suppliers, Refractory Brick, Refractory

Refractory Suppliers, Refractory Brick, Refractory

Refractory Suppliers

Yingkou Ruizhi Refractories Co., Ltd. is a professional China manufacturer of refractory material for high temperature melting furnaces.Ruizhi Refractories supply main products are: Refractory material, refractory brick, refractory castable,refractory nozzle, ceramic fiber, fire brick, insulation material for converter, electric arc furnace, ladle, LF furnace, tundish, foundry ladle, torpedo ladle, etc. Ruizhi has established technical cooperation relationship with some refractory research institutions and universities. Ruizhi Refractories products have been exported to such as South Africa, Australia, Canada, Malaysia, Bangladesh, Iran, Saudi Arabia, UAE, Iraq, Pakistan, Philippines, Vietnam, Singapore, Tajikistan, Indonesia, South Korea, Sri Lanka, Nigeria, Kenya, Ethiopia, etc.

http://www.ruizhirefractory.com/
Email: sales@ruizhirefractory.com

The role of variety bulk refractory material in artillery mud

refractory material

The preparation requirements of the stemming is the most error of each material weighing <0.5%, each weight of 250Kg feed according to a certain feeding order, require mixing, the total mixing time is 8 ~ 10min; prepared the temperature of the stemming 50 ℃, the upper limit of the mixture particle size <3 mm, while less than 0.088mm more than 40%, moisture <4%. The role of various bulk refractory materials in stemming is described below.
1, high bauxite
High bauxite particles and fines increase the fire resistance of stemming. The results of slag rotation erosion test show that the loss of stemming decreases with the increase of alumina content. Japan from the erosion of stemming mechanism found that the surface of the old aluminum high artillery mud although the electrical found SiC, alumina and other particles fall into the slag, but did not find the dissolution of alumina particles. In Japan, the use of electrically-conductive alumina is more common. Based on the national conditions in our country, it is appropriate to use super-rich or first-grade high-alumina bauxite which is rich in sources, inexpensive in bauxite, and capable of meeting the performance requirements.
2, silicon carbide
Carbide refractory with high strength, resistance to hot metal and molten slag erosion, high thermal stress characteristics. The quality of silicon carbide should match the quality of the aggregate, from the cold and the use of requirements, SiC content of 50% and 70% of the two to choose from.
3, sericite
Sericite as a ceramic binder to make mud with low temperature strength. Due to the high content of alkali metal, the refractoriness drops, the quick-drying gunnable can be rapidly dried and hardened in a large temperature range (500-1650 ℃) to form a continuous strength, which can shorten the pumping time and win the maintenance of the iron mud Set and repair the main trench ditch time, reduce the glowing ditch lining of the mud gun baking. Sericite can also increase the rheological properties of mud, mud plasticity and lubrication properties are properly raised. Its dosage is less, require mixing evenly in the mud.
4, refractory clay
Refractory clay is an inorganic binder, forming a ceramic bond at high temperature, which makes the stemming at medium and high temperature (900 ~ 1440 ℃) to obtain sufficient firing strength, good plasticity at room temperature. On the grain size is extremely strict, more than 0.088mm into less than 5%, can increase the "slip" effect of stemming, mud can reduce the launch pressure.
5, expansion of materials
In the taphole, the stemming is a layered or massive structure, and stripping and shedding are one of the major causes of wastage. One of the measures to be taken may be to increase the tackiness of the old stemming and the new stemming by adding an expanding material . The amount of expansion agent added to increase the effect of swelling is significant. Production of gun mud line rate of change should be controlled within ± 0.5%, if the amount is too large, then generate more low melting point compounds, the loss becomes larger, and control the amount of added is necessary. The addition of a bulking agent improves the expansibility of the shotcrete, improves the adhesion between the new shotcrete and the old shotcrete, and improves durability.
6, Coke powder
Coke powder has high slag resistance and abrasion resistance, good air permeability, carbon products in the molten iron slag through and after the condensation process, are not bonded with the slag iron. Coke powder in the mixture of particle size requirements <l mm, too large will affect the plasticity. The higher the fixed carbon content the better, the water as low as possible. Coking powder in the coke generally from the blast furnace under the coke, the φ750 × 500 crusher broken <5 mm the following use.
7, asphalt
Softening temperature of 105 ~ 125 ℃ hard pitch, softening better plasticity, coke formation under high temperature carbon network structure, so that it has a high temperature strength stemming, volatile in the plug after the pores in the small Conducive to the drying mud stem. As the softening temperature of bitumen increases above 200 ° C, there are more components forming the high polymer in the bitumen which will enhance the coking performance of the bitumen. Hard asphalt mixing mill in the work of the flood (≤ 50 ℃) insoluble tar, help hand-cranked mud preparation and plasticity increase.
8, off-anthracene oil
Desiccant anthracene oil as binder and plasticizer Jing use, at room temperature (50 ℃) to shoot with a good relaxation and coke at high temperatures (1200 ~ 1500 ℃) coke ability to enhance the strength of mud.


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