Tundish Slag Dam---Changxing Refractory Material

Tundish Slag Dam

Introduction:
The products are characterized by their high strength, good resistance to carrion and thermal shock and long service life. It can be effectively stabilization molten steel enter to mould, promote non-metallic inclusions in molten steel float, and improve the quality of steel.

Advantages:
slag weir are characterized by their high strength, good resistance to corrosion and erosion; they can effectively stabilize molten steel, promote non-metallic inclusions separation, and improve the steel quality.

Application:
It has good corrosion resistance,anti-erosion properties and long service life.

Content source:
http://www.yilongrefractory.com/ProductServletOne?id1=4&id=55
E-mail：sales8@chinaelong.com

Reasons of why tundish dry vibration mix takes the place of tundish insulation board

Reasons of why tundish dry vibration mix takes the place of tundish insulation board

Following the clay and high alumina brick, tundish insulation board, tundish coating, dry vibration mix is the fourth working lining materials for tundish. Following compare shows why dry vibration mix could replace the insulation board successfully.

Insulation board, which is mainly used in cold tundish (one without baking before being used), it devotes much for us in energy saving and heat insulation. But, due to its fatal disadvantage, it is being eliminated quickly.

1. Bonded with many agent, insulation board add silica and hydrogen under high temperature in steel liquid, reduce its purity, produce harmful gas to hurt worker’s health. VS: Dry vibration mix is bonded without carbon, produce no sharp aroma, and greatly reduce avoid the pollution for steel liquid and environment. 

2. Short using life (for common steel, only 8 Hrs, for Mn-alloy steel, only 4hrs). VS: dry vibration mix usual using life: 24 hrs min, when worked with the fast exchange nozzle, it could reach average using life 45hrs.

3. Easy to be broken during transportation, once one piece is broken, the whole set will can’t be work. VS: dry vibration is premixed and packaged in waterproof jumbo, applicable for ship, truck, train, air, etc long way transportation.

4. Low corrosion resistance, easy to make tundish become leakage. VS: dry vibration mix is made by ramming, dense and stable, after sintering, form a protect layer with tundish backing layer, could improve tundish using life and reduce spare tundish number.

Therefore, should you want to improve your tundish life, please do not hesitate to try Changxing Refractory dry vibration mix, 24 hrs using life is waiting for you. 

The Application of Forsterite Coating Material in Tundish

TheApplication of Forsterite Coating Material in Tundish

Forsterite uses natural olivine and medium grade and sintered magnesia as raw material, light burned magnesia powder, silica powder, Guangxi white mud, talc as binding agent and additives.

It has been proved that the service life of forsterite coating material and magnesia coating material are almost the same, which is 10-14 hours. After 10-14 normal using in CCM, the sintered layer thickness is mostly less than 30mm, which is about 10mm less than that of magnesia coating material. It means the thermal insulation performance of forsterite coating material is better. It is not likely to be sintered with permanent layer, which is easy for separation between the two layers. During the drying and preheating stage, the carbonate and sulfate in the raw material are decomposed and evaporated, so there will be no hydrogen absorption, recarburation or resulfurization during the tapping of molten steel. There is a stable spinel adhesive layer formed after the forsterite coating material is in touch with molten steel, which can prevent secondary oxidation of molten steel.