2017年6月23日星期五

How to prevent ladle refractory material sticky slag

Ladle Refractories
Our Ladle Refractories has Ladle magnesia carbon brick,Alumina-magnesite Carbon Brick for Ladle, Ladle Unshaped Refractory Material, Ladle Permanent Layer Castable.
With the following proper methods, we could prevents the ladle refractory material sticky slag from steel making.
It will guarantee the better quality of steel.
1. Increasing the hot turnover of ladle and decreasing the quantity and time of turnover of ladle.
2. Do better cleaning work of ladle bricks ladle, clean the ladle timely and fully, especially for the ladle month part.
3. Repair the damaged parts of the ladle lining timely, to prevent the molten steel and slag from entering into the lining.
4. Pour the slag out timely after work, shorten the time from pouring to turning over of the ladle.
5. Improve the performance of the pouring molten steel from the converter, prevent the converter slag into the ladle. And added the lime when do refining, to make sure the steel is fully melted.
6. Control the quantity of ladle, shorten the time of ladle keep for waiting, and do preheating before put the ladle into work.
7. On ladle refractories material, better the masonry quality, use the suitale size of fire bricks and improve the capacity of thermal shock resistance.
8. With suitable ladel covering agent, the use of it will keep the ladle insulated and with less ladle slag.
9. Choose the same grade of mortar to refractory bricks, such as with clay mortar for clay firebrick and magnesia mortar for magnesia firebricks.

Article source:
How to prevent ladle refractory material sticky slag

Email: sales@ruizhirefractory.com

2017年6月21日星期三

Refractory definition

Refractory material
Refractory material
Refractory material refer to inorganic nonmetallic materials with a refractoriness of not less than 1580 ° C.
Refractory materials are generally made of natural minerals and rocks of aluminum silicate as the main refractory raw material. Its basic processes and certain basic characteristics are similar to those of other products of the silicate system. Therefore, refractories are listed as one of the silicate systems Product and important part of the silicate industry. Refractory product same to cement, ceramics, glass and other silicate industry has a very important position and role in the national economy.
Because it has a special performance of resistance to high temperature  in the thermal equipment, then it occupies a very important position in the development of modern industry. With the discovery and need of science and technology, the use of refractory materials for furnace is expanding, from metallurgy (including steel and nonferrous metallurgy, etc.), silicate (cement, ceramics, etc.), chemical, power, machinery and other industries, extended to everything High-temperature operation of the industrial and mining enterprises, the kiln (combustion kiln, molten pool, fire, crucible) and other heat parts of thermal equipment, refractories are indispensable important building structural materials. In the field of cutting-edge science (such as rockets, atomic reactors, etc.) is also an indispensable high temperature resistant materials or parts.
As the refractory material used in a variety of different heating conditions of high temperature equipment, it is subject to high temperature and other different conditions, by the complex physical and chemical reactions and damage. Therefore, the refractory material must have the following important performance.
1.Refractory material is not easy to melt when in the case of high temperature
The working temperature of modern industrial kiln furnace is generally between 1000 ~ 1800 ℃, therefore the refractory for sale material must first be not easy to melt in this temperature.
2.Refractory material does not soften when in the case of high temperature pressure
The melting temperature of Most refractory material more than 1650 ~ 1700 ℃, but it reached the melting temperature before the deformation (softening), loss of structural strength, so the refractory material supply not only have a high melting temperature, but also with high temperature Under the conditions of the load does not occur deformation performance.
3.Volume stability in high temperature environment
Refractory materials used in high temperature conditions, due to physical and chemical reactions within the material and make the volume changes. Most of this change in refractory material is volume shrinkage, and a few are inflated. Whether it is volume shrinkage or expansion, such as beyond a certain range can cause damage to the furnace. So the refractory material is required to have good high temperature volumetric stability.
4.Refractory product can resist the sudden change and uneven heating of temperature to avoid damage to the furnace
In the intermittent operation of the kiln, the high temperature, the rapid changes in the various parts of the masonry heat uneven, brick body will produce stress inside the material cracking, resulting in furnace damage. So the refractory material should be able to withstand the rapid changes in furnace temperature and fluctuations do not crack the performance of thermal stability.
5.Refractory can resist the erosion of slag when in the case of high temperature
in the use of the process, due to disguised contact with fuel ash, molten slag and molten metal and other effects were eroded. Therefore, the refractory material should have the ability to resist this erosion. In the use of refractory materials, according to the main requirements of the use of various refractory materials and have the characteristics of a reasonable choice.

Article source:

Refractory definition

Email: sales@ruizhirefractory.com