How to choose insulation brick

 

The principles of choosing insulation bricks include:

1) It should not affect the service life of the entire refractory masonry;

2) For continuous working high-temperature furnaces, generally large-area heat preservation is reasonable, which can reduce heat loss. However, for some special areas, such as open hearth roofs, insulation can reduce service life. For periodic working furnaces, regenerative heat loss is the main factor of heat loss. Insulation can increase the temperature of the masonry and increase the regenerative heat loss. Therefore, whether the regular working furnace should be insulated shall be determined after calculating the heat storage and heat loss.

3) Due to the high porosity of insulating bricks, they cannot bear excessive load and should not directly contact molten metal, slag and high-temperature dust.

4) Insulation bricks have low strength. Brick joints and expansion joints should be properly handled to avoid damage caused by volume expansion. Insulation refractory bricks should not be subjected to strong mechanical vibration, impact and friction;

5) Since the thermal insulation brick has a large linear shrinkage after reheating, the maximum working temperature should be less than 100℃ than the firing temperature.

We Changxing Refractory Material Co.,LTD is professional manufacturer and supplier of refractory materials for more than 30 years. Our high quality mullite insulating bricks are good sold to many countries say South Africa, Bangladesh, Indonesia, Malaysia, etc. Shall any interests, welcome to contact us. Our team would make best to be your reliable partner!

Article Source:How to choose insulation brick
Company name: Henan Changxing Refractory Materials Co.,Ltd
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The refractories trend for EAF cover

Electric furnace cover with refractory material development trend is: brick - prefabricated block - the overall pouring. 

For alkaline fire brick cover, electric tile with magnets. In order to ensure the stability of the furnace cover structure and reduce the deformation and peeling of magnesia, the use of iron plaster or masonry insert iron. As the metal induced current (especially high power electric furnace cover), the formation of local overheating to non-magnetic steel fire brick, on the other hand pure magnesia brick linear expansion coefficient is too large, the amount of small. 

In addition, the whole pouring the cover. The use of the overall casting furnace cover to promote the life of the furnace to further improve. After the water is cooled, the electrode is also water-cooled around the electrode, and the high-alumina ultra-low cement castable containing 3% Cr2O3 is added from the material and the stainless steel fiber is added. The furnace cover is used in the case of slightly repaired 594 furnace and service life is 4 times than before.

Changxing refractory provides refractory products, calcium silicate products, castable & mortar, china refractory brick, ceramic fiber felt, ladle & tundish nozzle, ceramic fiber with high quality for you. Such as high alumina refractory bricks, magnesia carbon brick, clay refractory bricks and other refractory products.

Article Source：The refractories trend for EAF cover
Company name:Henan Xinmi Changxing Refractory Materials Co.,Ltd
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Refractories used in cement industry

Alkaline Refractories 
Alkaline refractory material is available for high temperature calcination,?also has superior chemical resistance property, which is a main material for cement kiln to keep high production quality, high yield, low consumption and long-term safe operation. Currently main material for cement kilns include direct-bonded magnesia chrome brick, semi-direct bonded magnesia chrome brick, ordinary magnesia chrome brick , dolomite brick, zirconium and zirconium-free special magnesite brick, spinel brick and chemically bonded unburned magnesia chrome brick.
Bricks properties are listed as follows:
High alumina brick
High alumina brick has high compressive strength, high refractoriness under load and good thermal shock resistance. Because of its low cost with high quality, it is widely used in varieties of cement kilns. When to be used in arch crown, calcined alumina brick is better.
High alumina bricks suitable for cement kilns include phosphate bonded alumina brick, phosphate bonded high alumina wear-resistant brick, anti-stripping alumina brick, chemically bound (special) alumina brick and general alumina brick and so on.

Alkali Brick Series
Alkali fire brick has excellent alkali corrosion performance, under certain conditions, it will react with the alkali compound kiln materials and kiln gas, rapidly forming enclosed type dense protective enamel layer on the turn, preventing the continuing internal mixing and bricks "base crack ", which is a indispensable kiln lining material in NSP kiln. This series bricks include ordinary alkali-resistant brick, high-strength alkali-resistant brick, insulation alkali-resistant brick and arch type alkali-resistant brick.
Series refractory castables 
Refractory castables can be produced with simple production process, which is flexible and convenient to be used in the cement kiln system. It has become increasingly common to be applied in the complex structure of cement kiln preheater system. Refractory castables suitable for cement kiln mainly include corundum castable, high alumina castable, alkali-resistant castables and light weight castable.
Article Source:Refractories used in cement industry
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
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Prevention and elimination of forging cracks (2)

Ultrasonic testing showed that the existence of cracks and pore defect of large forgings is an important cause of waste, most of which is due to internal blank there are loose, coarse grained inclusions, and cracks. They are due to the local inhomogeneous deformation, under great stress concentration and shear stress, which leads to the closure, compaction and the generation of deformation damage. Therefore, smelting of refractory raw materials, hot forging comprehensive control, cracks and eliminate the cause and condition is the effective measures to improve forging quality. However, for large forgings with inner crack defects have the healing repair, reopening to prevent scrap also has important economic significance.

The principleof crack repair: any structure and composition of heterogeneous refractory materials (including micro cracks), in the permit conditions, will tend to homogenization. Its essence is in force (diffusion concentration, electric field, stress field gradient) under the effect of diffusion and migration of metal atoms, the orientation of inner crack healing.

Now the application of high temperature diffusion treatment, pressure diffusion, diffusion and plastic deformation of the combination of healing methods. It have get obvious effect in the large tube plate, large module inclusion crack repair achieved remarkable results, and in the rolling steel tube, crack control.
The crack initiation and propagation in the forging process can be prevented and eliminated by using the internal crack repair mechanism effectively by means of the study and test method of hot forging crack, and combined with the microstructure and thermodynamic analysis of the forging cracks.
There have many refractory news and refractory products information on web. You can read more refractory products and know more refractory materials information.Because our website has many kinds of refractory news and industry news. what's more ,you can know more kinds of refractory information from our website.
Article Source:Prevention and elimination of forging cracks (2)
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
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The classification of complicated shape brick

Chinafirebrick provides refractory products, calcium silicate products, castable & mortar, fire brick china, ladle & tundish nozzle, ceramic fiber with high quality for you. Refractory brick manufacturers suggest that special-shaped refractory bricks according to the preparation process can be divided into firing bricks, not burning bricks, fused brick (cast brick), fire-resistant insulation bricks; specific type of refractory bricks by shape and size can be divided into standard Brick, ordinary brick, and so on. Shaped refractory bricks can be used as high-temperature building materials and structural materials for building furnaces and various thermal equipment. Shaped refractory bricks can withstand various physical and chemical changes and mechanical effects at high temperatures. Such as refractory clay brick, high alumina brick, silica brick, magnesia carbon bricks and so on.

Special strength refractories bricks, its main feature is the early high strength, 3-7 days maximum room temperature compressive strength of up to 30MPa or more, the disadvantage is poor in the temperature volumetric stability, reduced strength, the maximum decline of up to 40%, so require room temperature Strength must meet the design and national standards requirements. The main factors that reduce the temperature strength are: low-calcium high-alumina cement of special-shaped refractory brick in the heating furnace oven heating process to a certain temperature (350 ℃ or so), the hydrate began to dehydrate, the hydration of cement stone structure, dense Degree and strength decreased, castable volume changes, then castable body strength dropped to the lowest point, then stabilized.

With the heating temperature rose to 1100 ℃, the cement stone gradually sintered, shaped refractory brick crystal began to convert mullite crystals. With the rising temperature, mullite crystals continue to grow, castable in the matrix glass phase was liquid state, the formation of high temperature ceramic sintered, the strength significantly improved. At about 1300 ℃, the strength of the special-shaped refractory brick body can reach more than 60MPa, which is a special characteristic of the special-shaped refractory bricks at high temperature.

Xinmi Changxing furnace refractory Tips: You may also on the refractory fire brick, magnesia carbon brick, refractory manufacturers, refractory bricks prices, high alumina refractory bricks, clay refractory bricks, Henan refractory brick factory, Xinwei refractory brick factory, Xinwei refractory brick factory Interested if you have any need please call our service hotline.

There have many refractory news and refractory products information on web. You can read more refractory products and know more refractory materials information.Because our website has many kinds of refractory news and industry news. what's more ,you can know more kinds of refractory information from our website.

Article Source: Thermal conductivity of refractory bricks
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

what are the details of Ladle Nozzle Well Block?

Ladle Nozzle Well Block

Introduction:

The ladle nozzle well block connects the wearing refractory lining of the ladle bottom to the mechanism or ladle gate for the flow control. To the well block is asked a huge wearing resistance and moreover it has to protect the nozzle placed inside it. Our ladle nozzle well block is made with magnesia carbon material or alumina carbon material, which can be made according to customized.

The ladle nozzle well block can be realized in any size and shape and strengthened with steel fibers to improve its mechanical resistance.

The series of well blocks for nozzles are made from high-purity, high-density, high-strength materials. Based on different materials, they have corundum, magnesia carbon and alumina spinel carbon. 

Advantages:

They show the features of stable structure, excellent thermal shock resistance, good corrosion/erosion resistance and long service life.

Application:

It is mainly used to fix upper nozzle in steelmaking.

Specific Application:Used to fix upper nozzle.


Service Life:Make plain carbon steel, 100 heats MIN; for refining ladle, 30 heats MIN.

Article source:  Ladle Nozzle Well Blocks

Why is crystalline flake graphite a raw material of magnesia carbon brick？

1.The melting point of high temperature resistant graphit is 3850℃±50℃, and boiling point 4250℃, after burnt by ultrahigh temperature arc, the mass loss is small, and the coefficient of linear expansion is small. The strength of graphit will get higher with the increase of temperature, it will be doubled at 2000℃; If you need any refractory products, such as fire brick for sale, refractory raw materials, refractory nozzle and other refractory products.

2.Electrical conductivity and thermal conductivity. The electrical conductivity of graphit is one time higher than normal nonmetallic ore. Its thermal conductivity is even higher than some metals like steel, iron, lead, etc.. Thermal conductivity goes lower as temperature increase. Graphit can become thermal insulator at superhigh temperature;

3.Lubricating property. The lubricating property of graphit depends on the size of flake, the biger the flake, the smaller the friction coefficient, the better the lubricating property;

4.Chemical stability. Graphit has excellent chemical stability under normal temperature, it is resistant to the erosion of acid, alklai and organic solvent;

5.Plasticity. Graphit has good plasticity, can be grinded very thin;

6.Thermal shock resistance. Graphit is able to endure the drastic changes of temperature, volume change is small and there will be no crack.There have many kinds of refractory products in our factory. Such as fire brick, Magnesia Carbon brick, refractory raw materials, refractory nozzle and other refractory products.

Article source: Why is crystalline flake graphite a raw material of magnesia carbon brick

Global refractory market will reach 42.5 million tons in 2022

Emerging market infrastructure drives the recovery of the steel and cement industry and then drives the?refractory?industry slow growth. It is expected that by 2022, the global refractory market will reach 42.5 million tons. Despite China's economic slowdown, but China as a refractory power consumption, still occupies a pivotal position. Developed countries, such as the United States, Japan and Europe are very different, they use more efficient advanced production technology.

Although the current steel industry is still the main application areas of refractory industry. But the next few years, non-ferrous metals and minerals and minerals will become the mainstay of the refractory industry. Unstable castables and preforms will receive increasing attention due to their high performance and flexibility. Zirconium / zirconia, silicon carbide, ultra-high alumina and other special?refractory materials?will become increasingly popular because of their high performance applications in special fields.
Article source: Global refractory market will reach 42.5 million tons in 2022

The properties and applications of silicon carbide

On the domestic 34 black silicon carbide production enterprises to investigate statistics, in March China's black silicon carbide business average operating rate of 49%, compared with February increased by 6.58%. Changxing refractory offers many kinds of refractory products for you. Such as fire brick for sale, refractory nozzle ,refractory raw materila and other refractory products. March, Gansu Province, environmental protection efforts to reduce the number of enterprises have been normal production, coupled with the output of Ningxia region has also been restored, so in March China's black silicon carbide production continued to rise. Ningxia area operating rate from 51.89% to 62.81%; Gansu region operating rate from 29.86% to 36.49%.

China's black silicon carbide inventories rose in March, slightly lower downstream purchases, but after entering in April, the downstream inventory is insufficient, coupled with the export market exports will increase, taking into account some of the green silicon carbide production enterprises have Converting black silicon carbide in the plan, it is expected in April China's black silicon carbide production will continue to rise.

Changxing always offer best products and top servic for you all the time. Such as magnesia carbon brick, fire brick, refravtory raw material and other refractory products. Welcome to view our factory anytime.
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Tips in the use of ladle steel flow initiator

Tips in the use of ladle steel flow initiator:
1. Due to the ladle steel flow initiator in the ladle nozzle for a long time high temperature state, requiring a high degree of refractory sintering.

2. Due to ladle steel flow initiator filled into the outlet directly after contact with molten steel, the initial sintering temperature should not be too high.

3. Ladle steel flow initiator in the use of the process to withstand the large static pressure of molten steel, in order to prevent the collapse of the material, requiring raw materials with very good mobility, ladle steel flow initiator particles between the friction should be as low as possible.

4. Under the action of high temperature, control the appropriate drainage of raw materials, the volume effect of raw materials to prevent the use of the process in the production of ladle steel flow initiator can not automatically fall or can not effectively support the upper material.
The article source: http://www.chinafirebrick.com/Company_News_121.html

The application of chromite ore fines

Chromite ore fines has good increasing friction effect in low and high temperature, plays a dual role too. Added to rubber can play a good role of increasing friction, and do not scratch the duality and noise. In the friction material commonly used in chromite fines Cr203, content of 25%-40%, the higher Cr203 content, increasing friction effect is bigger. Use should pay attention to controlling the amount and particle size. Proper dosage should not exceed 7%, particle fineness more than 200 projects. Excessive dosage and coarse grain size can improve the friction coefficient but also will cause friction increases obviously.
The basic direction of the development of refractory fire brick technology is based on independent innovation as the basic starting point, take the refractory material design and application of scientific, production, application of fine and green, consumption reduction and resource conservation of the integration of the road to promote research and development On a new level. The innovative direction of the refractory for the cement industry is chrome-free and energy-saving.
There have many kinds of refractory products in our factory. Such as fire brick ,magnesia carbon brick, refractory raw material, refractory nozzle and other refractory products. When you want to know more kinds of refractory products, welcome to view our factory anytime.
The article source: http://www.chinafirebrick.com/Company_News_120.html

The development trend of green refractory materials

The future expansion of cement kilns in refractory materials can benefit from the promotion of similar energy conservation policies in the cement kiln, developed by the magnesium aluminum spinel, mafic spinel and mafic aluminum spinel brick in large new dry cement Brick kiln sintering belt and transition zone used to meet or exceed the magnesium chrome brick life, can replace magnesium chrome brick, significantly reduced the chromium pollution.
In the increasingly scarce national resources today, the new green and energy saving has become the purpose of the development of refractories. At present, Europe, Japan, the United States and other countries and regions due to government regulations, has been basically no chromium refractories, the use of green refractory has become an inevitable trend.There have many kinds of refractory products. Such as fire brick for sale, refractory nozzle, refractory raw material and other refractory products.

Should focus from the big, small start, face the reality, have focused, vigorously promote the user side, the production side, the R & D side, the design side of the co-operation and coordination. As a business, should strengthen cooperation with scientific research institutions and user units, increase production and research cooperation efforts, in the green refractory technology to achieve new breakthroughs.

China's refractory industry, the overall level of development from the advanced green there is a certain distance. Green refractories have attracted the attention of refractories and related industries. Relevant government departments and trade associations have also developed corresponding policies and measures to encourage and promote the fire-resistant green work. China Refractories Association also believes that the second five during the development of refractory materials will show new features, its basis is to improve product quality and application level, the focus is to increase or strengthen the new content, that is, energy saving and low carbon.

The basic direction of the development of refractory fire brick technology is based on independent innovation as the basic starting point, take the refractory material design and application of scientific, production, application of fine and green, consumption reduction and resource conservation of the integration of the road to promote research and development On a new level. The innovative direction of the refractory for the cement industry is chrome-free and energy-saving.
For the understanding of green refractory materials and behavior, should be under the guidance of the concept of systematic, balanced. For the refractory industry, should be from the preparation of raw materials to the production, construction, application and post-processing in all aspects of scientific and systematic considerations, to avoid thinking and vision confined to a point or face and trade-off.

Strengthen the energy-saving emission reduction, the development of green, low-carbon refractory products, is the global green economic strategy on the refractory industry's fundamental requirements. To further promote the refractory industry, technological innovation, product structure adjustment and application of technology to enhance and vigorously develop longevity energy-saving, environmentally friendly new type of green refractory products, refractory materials industry has become a megatrends.
There have many kinds of refractory products in our factory.Such as fire brick ,magnesia carbon brick, refractory raw material, refractory nozzle and other refractory products.
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Welcome to know the factors that affect the use of slide gate plate

1.Breakage around the hole caused by thermal shock. Small crack could appear when high temperature molten steel and refractory material get in touch, so it is crutial to improve the termal shock resistance and take measures to prevent the cracks from expanding.There have many kinds of refractory products in our factory. Such as magnesia carbon brick, fire brick for sale, refractory nozzle, refractory raw material.

2.The erosion and impact from molten steel and slags. The erosion and impact resistance abilities of slide gate plate has a big influence on its service life. The erosion is mainly from the Mn, MnO, FeO, CaO in the molten steel and SiO2 from slide gate plate, erosion resistance ability can be improved if the SiO2 content in slide gate plate is reduced. By improving carbon content, the permeation and reaction from molten steel and oxide can be effectively prevented, by adding antioxygen, the oxidation of carbon can be effectively prevented;

3.The abrasion during sliding. Especially when there is already damage on the ladle slide gate plate, the abrasion from the concrete steel will be more serious. So the strength should be improved, meanwhile keep low apparent porosity and smooth surface to reduce the penetration from molten steel. The main effective ways of improving strength and lowering apparent porosity are high pressure forming and vacuum oil immersing.There have many kinds of refractory products in our factory. Such as magnesia carbon brick, fire brick for sale, refractory nozzle, refractory raw material. When you need any refractory products, welcome to view our factory anytime.
Article source: http://www.chinafirebrick.com/Company_News_119.html

The features of magnesite for producing magnesia carbon brick

Magnesite is the main raw material for magnesia carbon brick, normally there are two kinds, sintered magnesite and fused magnesite. But comparing this two kinds, fused magnesite has the advantages of lager periclase crystal, bigger bulk density, etc. It is the priority raw material for producing magnesia carbon brick. When producing normal magnesia based refractory material, the requirements on megnesite are high temperature resistance and erosion resistance, thus the purity of magnesite, C/S ratio and B2O3 content are important. With the development of metallurgy industry, the smelting condition is becoming harder, the requirement of megnesite used for producing magnesia carbon bricks used in smelting equipment(such as Converter, EAF, Ladle) is not only on the chemical composition, but also on structure like high density and large crystal.
There have many kinds of refractory products in our factory. Such as magnesia carbon brick, fire brick for sale, refractory nozzle, refractory raw material. When you need any refractory products, welcome to view our factory anytime.
Article source: http://www.chinafirebrick.com/Company_News_118.html

Classification of unshaped refractory material

Compared with shaped refractory material, and unshaped refractory material have many advantages. For example, easy manufacturing process, short manufacturing period, saving energy, good integrity when using, widely application, and convenient for installation.

Though all with same shape, unshaped refractory products have different type. Generally, it is divided into following types:

1. According to porosity, there are compact unshaped material and insulating unshaped material.Compact unshaped material is common product. While insulating unshaped material is light weight castable, which is made according to ISO1927-75 standard. After frying, whose porosity cannot less than 45%.

2. According to different binder, castable is divided into two big molds, which are Inorganic binder castable and organic binder castable. According to Hardening mode , there are air hardening castable, hydraulicity castable, hot hardness castable and others kinds castable.

3. According to Construction characteristics, there are refractory castable, gunning mix, plastic castable, ramming mass, coating material , refractory mortar, vibration material and others.

Even with same specification, different function with different manufacturing method, if you need this kind products, please confirm application in advance. Welcome to view our website to know more kinds of refractory products. Such as fire brick for sale, refractory nozzle, refractory raw material and Magnesia Carbon Brick. Welcome to view our factory to know more details about refractory products.
Article source: http://www.chinafirebrick.com/Company_News_117.html

The sintering of tundish with dry vibration mix lining

1.For tundish with dry vibration mix lining, tundish should be cleaned before sintering, tundish cover should be changed if it is damaged. Under normal working condition, the sintering time for tundish should be more than 2.5 hours but less than 3.5 hours. Please follow the below procedures:
Small fire: Not less than 50 minutes;
Medium fire: Not less than 50 minutes;
Strong fire: Not less than 50 minutes;
Make sure sintering temperature is above 900 Deg.C, tundish in red hot condition.

2.Under abnormal working condition(time is not enough), the sintering time for tundish should be more than 2 hours, 60 minutes with medium fire and 60 minutes for strong fire. There have many kinds of refractory products in our factory. Such as fire brick for sale, Magnesia Carbon Brick, refractory nozzle, refractory raw materials and other refractory products.
Artilce source: http://www.chinafirebrick.com/Company_News_116.html

How can i know the application of corundum castable?

Corundum castable is a kind of high-grade unshaped refractories based on fused corundum as the main raw material, adding binder and other materials.

According to different parts and temperature, there is different choice of corundum castable: Chrome corundum castable, zirconia corundum castable, brown corundum castable, composite corundum castables and so on.

Chrome corundum castable is mainly used for carbon black reaction furnace, coal slurry gasifier lining, which the temperature is generally above 1700 degrees. Zirconia corundum castable is mainly used for glass industry furnace, it has strong anti-glass erosion ability. Brown corundum castable has good wear resistance, generally used for power plant coal injection pipe, boiler lining, rolling furnace slide rails.
Composite corundum castable is based on different temperature and environment, adds specific material and get composite corundum castable, it is generally used for cement rotary kiln, nonferrous metal melting furnace, steel and other industries. There have many kinds of refractory products in our factory. Such as Magnesia Carbon Brick, fire brick for sale, refractory raw material and other refractory products.
Article source:http://www.chinafirebrick.com/Company_News_115.html

How can i know the application of corundum castable?

Corundum castable is a kind of high-grade unshaped refractories based on fused corundum as the main raw material, adding binder and other materials.

According to different parts and temperature, there is different choice of corundum castable: Chrome corundum castable, zirconia corundum castable, brown corundum castable, composite corundum castables and so on.

Chrome corundum castable is mainly used for carbon black reaction furnace, coal slurry gasifier lining, which the temperature is generally above 1700 degrees. Zirconia corundum castable is mainly used for glass industry furnace, it has strong anti-glass erosion ability. Brown corundum castable has good wear resistance, generally used for power plant coal injection pipe, boiler lining, rolling furnace slide rails.
Composite corundum castable is based on different temperature and environment, adds specific material and get composite corundum castable, it is generally used for cement rotary kiln, nonferrous metal melting furnace, steel and other industries. There have many kinds of refractory products in our factory. Such as Magnesia Carbon Brick, fire brick for sale, refractory raw material and other refractory products.
Article source:http://www.chinafirebrick.com/Company_News_115.html

The application of Al2O3-C submerged entry nozzle

Al2O3-C submerged entry nozzles, take corundum and graphite as the basic raw materials, add metal silicon, silicon carbide, molding in the isostatic press, and then sintering.

This nozzle, with uniform structure, low infiltration to molten steel, strong erosion resistance, so it could be used for casting of most types of steel. A12O3-C submerged entry nozzle must be preheated to use, otherwise, the nozzle has the risk of cracking. In the preheating process, there will be graphite burning (decarburization), the nozzle surface layer apparent porosity increases, reducing its anti-erosion.

Another disadvantage of the submerged entry nozzle is poor slag resistance, good thermal conductivity, and thus the slag line is serious erosion and the inner wall of the nozzle is easy to condensate steel. It is necessary to take effective measures to protect submerged entry nozzle: such as add refractory fiber protective cover outside of the submerged entry nozzle, smear anti-oxidation layer on the surface, slag line with composite ZrO2-c material to improve slag erosion resistance and blow argon gas into the porous refractory layer on the inner wall of the nozzle.
There have many kinds of refractory products in our factory, such as refractory fire brick, refractory nozzle, refractory raw material and other refractory products. Welcome to view our website to know more information about refractory products.
Article source: http://www.chinafirebrick.com/Company_News_114.html

The requirements of refractory materials in cement rotary kiln burning zone

1. When the cement rotary kiln rotating lap, the refractory in the kiln will be exposed to the gas in the kiln once. In addition to the time, the refractory materials are covered by the material, so the kiln refractories hot surface temperature will be subject to periodic thermal shock, which requires the refractory materials in the burning zone have good thermal shock stability.

2. Cement rotary kiln in normal operation, there must have stable burning zone lining brick. And the “kiln skin” can not be too thick or too thin. When the “kiln skin” is too thick, it will affect the normal calcination, affecting production; if the “kiln skin” is too thin, the meting loss of refractory materials is large. So the refractory materials need a good hang "kiln skin" ability.

3. Cement clinker will form silicate liquid phase at high temperature and silicate liquid phase easily penetrate into the refractory fire bricks, resulting in refractory chemical composition and mineral composition changes or even damage. Therefore, refractory materials need have strong resistance to erosion. There have many kinds of refractory products in our factory, such as fire brick for sale, refractory nozzle, refractory raw material, refractory nozzle. Welcome to view our factory to know more refractory products.
Article source: http://www.chinafirebrick.com/Company_News_113.html