About construction of refractory bricks

 

Masonry refractory bricks should be designed to avoid the following erroneous operations.

1) Misplacement: brick and brick dislocation
2) Tilt: not parallel to the axial direction
3) Climbing: There is a regular unevenness on the circumferential surface, which should be controlled within 1mm.
4) From the middle: the bricks in the masonry are not the same as the cylinder
5) Zhangkou: small and large inside the gray joint in the annular masonry
6) Empty: Refractory mud is not full between bricks and bricks
7) Snake shape: radial seam, circumferential seam is not straight and wavy
8) Inverted size head
9) Severely missing corners
10) Masonry drum kit: belonging to equipment deformation or cleaning of the inner surface of the cylinder is not clean
11) Hair seam: iron plate exposed or fire mud is not hooked, brick surface is not clean
12) Mixing: Misuse of mud is not allowed

We Changxing Refractory Material Co.,LTD is professional manufacturer and supplier of refractory materials for more than 30 years. Our high quality refractory products 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:About construction of refractory bricks
Company name: Henan Changxing Refractory Materials Co.,Ltd
More refractory products:https://www.cxrefractories.com/en-product-solution
Email:info@cxrefractories.com
Website:https://www.cxrefractories.com

 

Introduction of magnesia-calcium bricks

The magnesia-calcium brick, also known as high calcium magnesite brick, is a kind of magnesial refractory material with periclase as principal crystalline phase and tricalcium silicate as secondary phase. It contains 80 % ~ 87% MgO, 6 % ~ 9% CaO, CaO/SiO2 ratio is between 2.2 ~ 3.0. Its significant structural feature is periclase directly contact with dicalcium silicate and tricalcium silicate, making eutectic solution-4 Cao-Al2O3-Fe2O3 fill into crystal gap between dicalcium silicate and tricalcium silicate. Its porosity is low, the refractoriness under load is higher than 1700 ℃. It has good alkaline slag resistance ability, but with poor thermal shock resistance. Made by calcium magnesia sand as refractory raw material, it will be made by firing at 1550~1600 ℃ after crushing, burdening, mixing and molding. It will be used at eye place of side-blown converter, top place of open-hearth furnace and oxygen-blown converter etc.

Magnesia-calcium brick has seven properties: High temperature resistance, slag resistance, spalling resistance, wear resistance, purifying molten steel and hydration resistance performance.

With the increasing production of stainless steel and all kinds of clean steel products, the demand of various magnesia calcium brick are increasing accordingly. For better production and using correctly, detailed understanding and learning of working performance and influencing factors of magnesia calcium bricks are very necessary.

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:Introduction of magnesia-calcium bricks
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

Matters need attention in designing ladle cover

1. There are normally two kinds of ladle cover, water-cooling cover and refractory material cover. Compared with refractory material cover, water-cooling cover is with much less maintenance work. However, water-cooling cover is with more energy loss, especially for small ladle. It is reported that, for a 300t ladle, the energy loss with water-cooling cover is 12-14%, while as high as 41% for a 40t ladle. Thus energy loss and maintenance should both be put into consideration during designing.
2. To ensure good inner environment in ladle, reduce oxidization of electrodes and slag, reduce molten steel absorbing hydrogen and nitrogen from the air, it’s better to keep a mirco positive pressure status.
3. Deploy a hood on ladle cover and a tube by the side of the hood, or deploy several vacuuming holes under the ladle cover, then connect them to the tube, set a regulating valve plate to form the second vacuuming point in the ladle.
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: LF refining furnace or ladle applied materials
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

The high temperature compressive strength of the refractory fire bricks

The high temperature compressive strength of the refractory brick china (abbreviated as HCS) refers to the maximum pressure (in MPa) per unit area of the material at high temperatures above 1000-1200 °C. The compressive strength of the refractory material generally varies with increasing temperature. From the normal temperature from the temperature rise, the intensity of a straight line down. Since then, some of the material continues to decline with increasing temperature; some materials rise as the temperature rises to a certain extent and rises to a maximum temperature at a specific temperature, followed by a sharp drop. The following figure is a number of commonly used china refractory brick high temperature compressive strength with temperature changes.
The change in the high temperature compressive strength of the refractory fire brick is controlled by changes in certain components, especially those in which the matrix or its bound phase occurs at high temperatures. In general, the sintered refractory raw material, which is entirely composed of crystal, is prone to plastic deformation due to its grain and grain boundaries at high temperature, especially when its loading speed is small, so that the strength decreases with the temperature reduce. When some of the crystal phase between the melting point at high temperature or the formation of melt, such as silica brick, clay brick and high alumina brick, the matrix is mainly composed of glass phase, with the temperature rise, the strength of such multi-phase material the microstructure decreases with temperature. When the temperature is further improved, due to the viscosity of the glass phase from brittle to toughness, so that the material between the particles more firmly, so that the strength was significantly improved. Then, as the temperature increases, the melt viscosity of the material decreases sharply, and the strength of the material decreases sharply.
Changxing refractory are mainly producing high alumina brick, high alumina refractory bricks, alkali resistant brick, castable, clay brick, insulation brick, light high alumina brick, low creep high alumina brick, high aluminum wear Brick, high aluminum lightweight insulation brick, clay insulation brick, if you have any need please contact us anytime.
Article Source: refractory fire brick
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

The specification of refractory bricks

Refractory firebrick is aluminum silicate refractory material, with A12O3 and SiO2 as its basic chemical composition, according to A12O3 and SiO2 content ratio, this type of refractory material is divided into three kinds: semi-silica brick (A12O3 15 ~ 30%), Clay brick (A12O3 30 ~ 48%), high alumina brick (A12O3> 48%). Clay brick is one of the largest and most widely used, the output of the total output of refractory materials of about 60 to 70%.
Refractory brick raw material is calcined after A12O3 + TiO2 content of not less than 30% of the china refractory brick, alkali and alkaline earth metal oxides and iron oxide content should be as little as possible, generally about 5-7%. Fire resistance of refractory clay must be no less than 1580 ℃. Clay raw materials after calcination, broken, ingredients (adding soft clay as a binder), pressing molding, drying, firing and other processes, you can get finished refractory bricks.
Refractory firebrick is weak acid refractory. As the chemical composition of the larger fluctuations in the production methods are different, the difference in firing temperature, so that the nature of clay brick changes. Ordinary clay brick according to the composition of the content of Al2O3 is divided into (NZ) a 40, (NZ) a 35, (NZ) a 30 three grades. The refractory degree of clay brick is above 1600 ℃, but the starting softening temperature is very low, only 1250 ~ 1300 ℃, and the load softening start temperature and the final temperature (fflJ40% deformation temperature) interval is large, this interval is about 200 ~ 250 ℃. Clay brick is very important in this nature, it makes the clay brick, although not too high refractoriness, but still can be applied to many high-temperature thermal equipment. Clay brick quenching and cooling is better, at 850 ℃ water cooling up to 10 to 25 times. Clay brick can resist weak acid slag erosion, little resistance to alkaline slag, increase the content of Al2O3, can improve the ability of alkali-resistant slag.
The refractory firebrick is rich in raw materials, the manufacturing process is simple and the cost is the lowest, and it is widely used in the furnace, flue, chimney, waste heat utilization device and burner of various heating furnaces and heat treatment furnaces. Chinafirebrick 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.
Article Source: fire brick for sale
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

The specification of mullite castable

Mullite castable is to high-quality porous mullite aggregate as refractory raw materials, plus fine powder and additives into the mixture. Mullite aggregate critical particle size of 12mm; long-term use of the temperature of 1350 degrees. Changxing refractory also offer mullite insulating firebrick and  other refractory products.
Features:
Mullite pouring material using high temperature, can be directly exposed to the flame for the use of refractories working lining to achieve high temperature energy saving; unit capacity light weight, structural weight to reduce 40 ~ 60%, to eliminate the roof hanging fire brick fracture; low thermal conductivity, to the stone aggregate ingredients, low thermal conductivity, good insulation properties; can quickly oven, shorten the oven duration, significant economic benefits;
Applications:
Mullite Castable for the petrochemical industry tubular heating furnace, light diesel oil, ethane cracking furnace lining, atmospheric pressure reducing furnace, sulfur recovery device, steam boiler, tortoise net insulation layer, two barrels and pipe insulation single Layer, other industrial furnace door, see the fire hole, observation hole door lining and so on.
We are mainly producing high alumina bricks, high alumina refractory fire brick, alkali resistant bricks, refractory bricks, clay tiles, insulation bricks, light high alumina bricks, low creep high alumina brick, high aluminum wear Brick, high aluminum lightweight insulation brick, clay insulation brick, if you have any need please call our service hotline.
Chinafirebrick 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.
Article Source: fire brick for sale
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

The specification of firebrick in gasification furnace

Clay refractory bricks as an important refractory, changxing refractory to tell you about clay refractory in the gasifier in the standard use, there have been some problems should be avoided?

Clay refractory bricks in the operation of the gasifier has also occurred in the oxygen load fluctuations, and sometimes oxygen regulator valve will cause changes in oxygen load, and sometimes large particles will suddenly stuck high pressure coal slurry pump valve, coal slurry flow suddenly caused by Oxygen is relatively excessive. Oxygen fluctuates directly after the furnace temperature fluctuations, oxygen fluctuations in the range of sometimes 500m3 ~ 600m3, the maximum reached over 1000m3 or so. Oxygen suddenly rose, resulting in a sudden rise in furnace temperature, will suddenly burn high temperature thermocouple, this situation on the clay refractory brick is great, should try to avoid. First of all, we all know that the furnace temperature on the life of the refractory lining is very important, so to strictly control not overheating. Under the normal production conditions, the clay refractory brick surface has a layer of cinder layer, in fact, slag is dynamic, low temperature slag thicker, high temperature slag thinner, suitable thick slag layer can slow down the high temperature gas and slag Scouring. The same time as
The above is on the clay refractory fire bricks in the gasifier in the standard use, hoping to bring you help. Is a professional refractory production enterprises, the company qualified, advanced equipment and experienced. Product quality is strict checks, deep products of our customers love. At present, the company produced refractory products are shaped bricks, high alumina brick, square brick, clay refractory bricks, we warmly welcome the needs of customers to visit the company to discuss and seek common development.

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. Chinafirebrick provides refractory products, calcium silicate products, castable & mortar, fire brick, 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.

Article Source: Refractory Fire Bricks
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

The application and features of High Alumina Brick

Clay refractory brick is Al2O3 content of 30% to 40% of aluminum silicate material of clay products. Clay brick is 50% soft clay and 50% hard clay clinker, according to a certain size requirements for ingredients, after molding, drying, in the 1300 ~ 1400 ℃ high temperature firing. The mineral composition of clay brick is mainly kaolinite (Al2O3 · 2SiO2 · 2H2O) and 6% ~ 7% impurities (potassium, sodium, calcium, titanium, iron oxide). stick
The calcination process of tiles is mainly due to the process of crystallization of kaolinite (3Al2O3 · 2SiO2). The SiO2 and Al2O3 in the clay brick form an eutectic and low melting point silicate with the impurity surrounding the mullite crystals during the firing process.
Clay refractory bricks are weak acid refractory products, can resist acid slag and acid gas erosion, resistance to alkaline substances slightly worse. Clay brick thermal performance is good, resistance to rapid cooling hot.
Clay refractory firebrick degree and silica brick comparable, up to 1690 ~ 1730 ℃, but the load softening temperature is lower than the silica brick 200 ℃. Because the clay brick contains high refractory mullite crystals, but also contains nearly half of the low melting point amorphous glass phase.
In the temperature range of 0 ~ 1000 ℃, the volume of clay brick with the temperature rise and uniform expansion, linear expansion curve is similar to a straight line, linear expansion rate of 0.6% to 0.7%, only half of the silicon brick. When the temperature reaches 1200 ℃ and then continue to heat up, the volume will start to shrink from the maximum expansion. The residual shrinkage of the clay brick leads to the cracking of the masonry gray seam, which is a major drawback of the clay brick. When the temperature exceeds 1200 ℃, the clay in the low melting point material gradually melted, because the particles by the surface tension and rely on each other very tight, resulting in volume shrinkage.
As the clay refractory fire brick load softening temperature is low, at high temperature shrinkage, thermal conductivity than silica brick 15% to 20%, mechanical strength is also worse than the silicon brick, so clay can only be used for the secondary parts of the coke oven , Such as regenerative room wall, small flue lining brick and regenerator lattice brick, door lining brick, roof and riser lining brick.
Xinmi Changxing furnace refractory Tips: You may also on the refractory bricks, refractory manufacturers, refractory bricks prices, high alumina refractory bricks, Magnesia Carbon Brick, 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.
Article Source: Generality High Alumina Brick and Clay Brick
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

The different uses of high alumina bricks

Clay refractory brick is Al2O3 content of 30% to 40% of aluminum silicate material of clay products. Clay brick is 50% soft clay and 50% hard clay clinker, according to a certain size requirements for ingredients, after molding, drying, in the 1300 ~ 1400 ℃ high temperature firing. The mineral composition of clay brick is mainly kaolinite (Al2O3 · 2SiO2 · 2H2O) and 6% ~ 7% impurities (potassium, sodium, calcium, titanium, iron oxide). stick
The calcination process of tiles is mainly due to the process of crystallization of kaolinite (3Al2O3 · 2SiO2). The SiO2 and Al2O3 in the clay brick form an eutectic and low melting point silicate with the impurity surrounding the mullite crystals during the firing process.

Clay refractory bricks are weak acid refractory products, can resist acid slag and acid gas erosion, resistance to alkaline substances slightly worse. Clay brick thermal performance is good, resistance to rapid cooling hot.

Clay refractory firebrick degree and silica brick comparable, up to 1690 ~ 1730 ℃, but the load softening temperature is lower than the silica brick 200 ℃. Because the clay brick contains high refractory mullite crystals, but also contains nearly half of the low melting point amorphous glass phase.

In the temperature range of 0 ~ 1000 ℃, the volume of clay brick with the temperature rise and uniform expansion, linear expansion curve is similar to a straight line, linear expansion rate of 0.6% to 0.7%, only half of the silicon brick. When the temperature reaches 1200 ℃ and then continue to heat up, the volume will start to shrink from the maximum expansion. The residual shrinkage of the clay brick leads to the cracking of the masonry gray seam, which is a major drawback of the clay brick. When the temperature exceeds 1200 ℃, the clay in the low melting point material gradually melted, because the particles by the surface tension and rely on each other very tight, resulting in volume shrinkage.

As the clay refractory fire brick load softening temperature is low, at high temperature shrinkage, thermal conductivity than silica brick 15% to 20%, mechanical strength is also worse than the silicon brick, so clay can only be used for the secondary parts of the coke oven , Such as regenerative room wall, small flue lining brick and regenerator lattice brick, door lining brick, roof and riser lining brick.
Xinmi Changxing furnace refractory Tips: You may also on the refractory bricks, refractory manufacturers, refractory bricks prices, high alumina refractory bricks, Magnesia Carbon Brick, 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.

Article Source: Generality High Alumina Brick and Clay Brick
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

International standard for the volume density of firebrick

China refractory brick is divided into ordinary clay refractory bricks, dense clay refractory bricks, high-density clay refractory bricks, silica bricks, magnesia carbon bricks, aluminum-magnesium carbon brick, the bulk density of different, some soft, and some hard.

According to the different types of raw materials used in the production of refractory bricks, the density of the refractory bricks china is different. The general refractory is measured at the factory before the bulk density and bulk density: the ratio of the mass of the dried product to its total volume, expressed in g / cm3 , The bulk density index is the main indicator of the degree of product density, high density, you can reduce the external slag and other invasive.

Ordinary clay refractory bricks are generally 1.8 ~ 2.0g / cm3, dense clay refractory bricks are generally 2.05 ~ 2.20g / cm3, high dense clay refractory bricks are generally 2.25 ~ 2.30g / cm3, silica bricks are generally 1.80 ~ 1.95g / cm3 , Magnesium bricks are generally 2.60 ~ 2.70g / cm3, aluminum and magnesium.
Carbon brick is generally 2.90 ~ 3.00g / cm3, the product of the bulk density index is the product volume and the composition of the comprehensive reflection of the composition of minerals, because it is easier to measure, in production is usually used as a means to determine the degree of sintering products.

We are mainly engaged in the production of refractory bricks, high alumina bricks, high alumina refractory bricks, alkali-resistant bricks, clay tiles, insulation bricks, light high alumina bricks, low creep high alumina bricks, Brick, high aluminum lightweight insulation brick, clay insulation brick, if you have any need please call our service hotline.

Article Source:Refractory news
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

The application and requirements of refractory brick masonry

China refractory brick masonry construction, first of all, clear the construction tasks; secondly, do the "three check", that check personnel, check the material, check the scene; then, ready, remove the hidden dangers, reduce the problem; finally, In order to cope with possible accidents.

1. Careful analysis of drawings, a clear construction tasks, understand the design intent, to clarify the design requirements of each part and the main points.

2. Visit the design side, the supply side, the construction side, the application side of the leadership, to clarify the parties, the parties within the working relationship and organizational relations, the implementation of their respective responsibilities, clear what problems, who should solve. Changxing refractory to provide you with technical solutions.

3. Check the refractory raw materials, construction tools and auxiliary facilities into the site to confirm whether the varieties, specifications, quantity and quality meet the construction requirements. Whether the personnel and organizations involved in the construction meet the intended requirements.
Chinafirebrick provides refractory products, calcium silicate products, castable & mortar, fire brick China, ladle & tundish nozzle, ceramic fiber with high quality for you.There have many refractory news and refractory products information on web. You can read more refractory products and know more refractory materials information.
Article Source:More refractory news
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

Basic requirements of refractory brick masonry

Refractory fire brick masonry construction, first of all, clear the construction tasks; secondly, do the "three check", that check personnel, check the material, check the scene; then, ready, remove the hidden dangers, reduce the problem; finally, In order to cope with possible accidents.

1.Careful analysis of drawings, a clear construction tasks, understand the design intent, to clarify the design requirements of each part and the main points.

2.Visit the design side, the supply side, the construction side, the application side of the leadership, to clarify the parties, the parties within the working relationship and organizational relations, the implementation of their respective responsibilities, clear what problems, who should solve. Changxing refractory to provide you with technical solutions.

3.Check the refractory raw materials, construction tools and auxiliary facilities into the site to confirm whether the varieties, specifications, quantity and quality meet the construction requirements. Whether the personnel and organizations involved in the construction meet the intended requirements.
Chinafirebrick provides refractory products, calcium silicate products, castable & mortar, fire brick China, ladle & tundish nozzle, ceramic fiber with high quality for you.There have many refractory news and refractory products information on web. You can read more refractory products and know more refractory materials information.
Article Source: China refractory fire bricks
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/

The different types of refractory fire bricks

1.Disperse type. There have many refractory news and refractory products information on our factory. Such as Ladle Permeable Brick, fire bricks and other refractory products. You can read more refractory products and know more refractory materials information. It is composed of grains which are used for adjusting the purge plug, which makes it highly permeable. But the permeability can not be manually controlled, it is with low strength and service life.

2.Slit type. The air gap is formed by the septas between the micro dense sheets. Air is blown into refining ladle through these gaps. The adjustability of blowing capacity is better than disperse type but still not easy to control.

3.Aligned pore type. It is produced by putting different numbers of thin stainless steel pipes inside. The air volume and distribution can be manually controlled by this type of purge plug, it is also with higher service life.

4.Maze type. It is produced by putting a netted air supplying tunnel in the fine and closely woven base. Air volume can be easily controlled. Even if one pass is blocked by the penetrated molten steel, air still can go into the refining ladle through other passes.

5.Maze combined with aligned pore type. It combines the advantages of both aligned pore type and maze type, thus offers better performaces.

There have many kinds of refractory products in our factory. What's more, there have many kinds of refractory fire bricks and other refractory products in our factory. Welcome to view our factory anytime.
Article Source: Different types of purge plug for refining ladle
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
Email: sales1@chinafirebrick.com
Website:http://www.chinafirebrick.com/