Development and function of casting powder

Submerged entry nozzle casting powder had been adapted in continues casting for more than 30 years. Casting powder is a very efficient technology which had made a great help for stablishing CCM technology, extending melting steel type, improving steel billet quality and capacity. In other word, without casting powder, CCM technology can not reach current level.Therefore, casting powder is an important part of modern CCM technology. Every country is investing a great labor and money in developing casting powder to satisfy CCM production requirement, which improve the developing of CCM technology.There have many kinds of refractory products in our factory.

Totally speaking, function of casting powder in continues casting progress is as following,
1.Making continues casting stable, ensure that the continues casting can move on smoothly.
2.Improving steel billet surface and under-surface steel quality.

Function of casting powder in mould is as following,
1.Casting powder can create an insulation layer on steel level, which can help to keep temperature of the melton steel.
2.Protecting the melton steel from secondary oxidation.
3.Casting powder can absorb floating inclusion in melton steel.
4.Casting powder has a good function of floating.
5.Casting powder can help to control the heat conducting.
There also have many kinds of refractory products in our factory,such as clay insulating bricks, fire brick ,refractory raw materials,refractory nozzle, etc.When you need any refractory products,welcome to view our website to know more kinds of refractory products.
article source: http://www.chinafirebrick.com/Company_News_93.html

Would you like to know chinese refractory output trend ?

Changxing refractory always offer best service and good products for you.Changxing Refractory is a Chinese leading refractory and oil fracturing proppant manufacturer & supplier with a wide range industries in high temperature field .
Production of refractory products in China suffered a slowdown in the first half of the year, while exports of refractory mineral raw materials also saw double-digit declines. Prices continue to edge downwards.
Chinese refractory products output in the first half of 2016 decreased 6% y-o-y to a total 10.57m tonnes, according to latest industry estimates by the Association of China Refractories.
Of this, density refractory product accounted for 6.98m tonnes, 2% below last year. Insulating refractories totalled 259,100 tonnes.Changxing has a production line, which is base on oil & gas applied ceramic proppant, and also with 3 factories focusing on all kinds of refractory materials used for iron & steel casting, cement, glass petrochemical and ceramics industries.
Changxing refractory have many kinds of refractory products.Such as clay insulating bricks,fire brick ,refractory nozzle. With abundant sources and professional techniques, Changxing Refractory would like to build a reliable and efficient platform for customers all over the world.
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Delelopment of continues casting and tundish

There have many kinds of refractory products in our factory.Such as Clay Insulating Bricks,refractory castable,refractory materials.CCM first appear in 1950s, it is characterized by fast casting and focus investment. CCM technology was developing in a very fast speed. In Year 1970, CCM only took 5.6% all over the world, while the data reached 62.4% in Year 1990, and in some developed countries, it was even 95%. In recent years, many steel plants adapted CCM instead of mould casting. Until Year 1994, in total 24 countries are of full CCM now.

Compared with traditional mould casting, CCM can improve metal recycle rate and low down power consumption. CCM can make the melting work simple and short the melting time, in which way the production efficiency can improve in a large degree.?Tundish is a middle progress of steel making, and it is the kep point which can decide continues casting or not. Furthermore, tundish would have a big effect on melten steel quantity and quality. Its functions are as following.

1.Diversion. For multi-strand CCM machine, the melten steel would be divided from tundish.
2.Continues casting. When multi-furnace continuous casting, tundish can be a holder when changing ladle.
3.Lowing down presure.
4.Protecting melten steel quality. Through using covering agent,long nozzle and other protecting device, tundish can help to protect the melten steel quality.
Article source: http://www.chinafirebrick.com/Company_News_92.html

Covering agent for molten steel

Generally speaking, there are three different kinds covering agent, which are ladle covering agent, tundish covering agent and hot metal ladle covering agent. There have many kinds of refractory products in our factory ,such as refractory nozzle,Clay Insulating Bricks,refractory raw materials.The mainly function of them are same as following:
1. Molten steel insulating. This is also the mainly function for covering agent. When pouring on molten steel, which can break and spread out in a short time, and protect molten steel from air. Covering agent can make sure cooling speed of molten steel less than 0.5℃/min.
2. Molten steel purifying. Convering agent also can purify molten steel when working. It can absorb impurity in molten steel.?
3. Lubrication action.It can protect billet steel from defect.?

According to different furnace and different working layer of furnace, covering agent can be made into four different types, which are acid covering agent, alkalescent covering agent, neutral covering agent and double layer covering agent.

If you need covering agent and refractory products, please tell me applied furnace, ladle , tundish or hot metal ladle, except that please confirm working layer of this furnace. According to this and we can provide you exactly recommendation.When you need any Insulating clay Bricks,welcome to view our website to know more details.
article source:http://www.chinafirebrick.com/Company_News_91.html

Characteristic of magnesia carbon brick

Magnesia carbon brick is made from high purity magnesia sand and additive agent. Manufacturing process include mixing raw material, shaping by pressure machine and drying with high temperature kiln.

Magnesia carbon brick is widely applied for converter furnace, ladle, electric furnace and blast furnace and so on.

Raw material can influence brick’s quality directly. Generally speaking, magnesia sand for magnesia carbon brick include fused magnesite and magnesite clinker. Fused magnesite clinker with performance of large grain, high purity, less Silicate phase and high direct binding degree. While magnesite clinker with smaller grain ,more Silicate phase and poor direct binding degree. So magnesia carbon brick made from fused magnesite is more expensive.

We are professional manufacture for magnesia carbon brick, and factory is located in place of manufacturing for magnesia sand. All the bricks made from high quality fused magnesite or magnesite clinker according to brick application.

We not only provide products, but also can design and install bricks for your furnace. There have many kinds of refractory products in our factory.Such as fire brick for sale ,refractory nozzle ,refractory castbale .If you need any magnesia carbon brick, please inform your furnace type and applied department, and exactly recommendation can be provided for you.
article source:http://www.chinafirebrick.com/Company_News_90.html

New construction method of 100MT ladle permanant layer

In order to improve the material service life, China An Steel adjusts the construction method of their 100MT LF ladle as following.If you need any fire clay bricks , welcome to view our website to know futher information.

1.Install bottom well block mold, then put one layer of high alumina blowing felt on the bottom.
2.Use mixer to mix running castable into running condition, to install bottom permanant layer.
3.After the running castable curdled, install bottom working layer.
4.Put one layer of high alumina blowing felt on the ladle wall.
5.The gap distance between ladle wall working layer and high alumina blowing felt would be permanant layer thickness (normally would be 70-110mm). After installing working layer of 3-5 layers (about 300-500mm high), inject running castable into the gap between ladle wall working layer and high alumina blowing felt. Then use trowel to make the castable hard. Repeat the above procedure until LF construction finished.
6.On basis of optimized sintering method, sinter the ladle for 24 hours. After sintering, the ladle can be used.

Install the LF in above method, it has advantages as following.

1.Permanant layer and working layer are installed at same time, in which way they can be combined closely. During sintering period, deformation of permanant layer can be sperated. In this way, gap would not appear, and improve safe of the LF.
2.Permanant layer running castable is of high strength, it would not be easy to be damaged when unpacked and translated.?
3.No need mold, in which way can avoid damage the ladle brick by vibrating.
4.No need to sinter the permanant layer seperately. The LF would be sintered for 24 hours in optimized method. During actual working, it would not cause problem of gas in melton steel rising up.
There have many kinds of refractory products in our factory.Such as fire brick for sale,refractory products,refractory raw materials and so on.When you need any refractory products , welcome to view our website to know more details.
The source:http://www.chinafirebrick.com/Company_News_89.html

Come to know the application of fire bricks on chinafirebrick

Would you like to know more fire brick for sale?There have many kinds of refractory products in our factory .The storage and installation parameters associated with monolithic refractories vary across specific manufacturers and products but, generally speaking the materials and water used to mix the material should be between 60 degrees and 80 degrees Fahrenheit at the time of installation and during the period of time within which the “initial set” takes place.
When long-term climate controlled storage of materials is not possible, the following tips may prove to be valuable:
Consider temporary heated storage such as a shipping container, tent, or trailer.
Consider encapsulating and heating the work area. In addition to ensuring that the materials are installed at the proper temperature, encapsulating the work area also contributes to the comfort of the employees performing the work and prevents dust from traveling to unintended areas.
Relocate items not used during a maintenance outage to accommodate material storage.
Coordinate “just in time” delivery of materials from a climate controlled environment to minimize the period of time the materials are exposed to cold temperatures.
Use totes, barrels, tanks, etc. in conjunction with heating devices in order to ensure water is the proper temperature prior to mixing. Be careful when heating water. If the water is too warm, it can cause the material set-time to decrease which also has the potential to adversely impact material properties and performance.When you need any china fire brick , Please tell us the product material, style, size and quantity ordered and other specific requirements, so our customer service staff to give an accurate quote.
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