To prevent molten steel of the ladle nozzle from freezing, filling sand need to be filled into ladle nozzle, our company produce two kinds of filling sand: silicious and chromium based. Our chromium nozzle filling sand is made by using chrome ore as main material, conditioning agent as auxiliary material, which is kind of molten liquid flow material.There have fire clay bricks,refractory nozzle ,refractory raw materials and other refractory products,

As filling sand used at ladle nozzle lower position, it is requested to be sintered at low temperature in order to avoid of flowing up when pouring molten liquid into ladle. On the other hand, it is also important character that the thickness of sintered layer which facing liquid side, can’t be too much during the high temperature and long-time refining process, otherwise, the auto tapping rate will be reduced to some content, which definitely affects normal and continuous steel making operation. Silicious and magnesial filling sand obviously can’t meet the requirement of auto tapping rate under high temperature and long-time refining process, so chromium filling sand was developed under this circumstance. Compared with the above mentioned filling sand, chromium filling sand possess higher tapping rate and more safe.

Changxing Refractory is a Chinese leading refractory and oil fracturing proppant manufacturer & supplier with a wide range industries in high temperature field. There have many kinds of refractory products in our factory.Such as fire brick for sale, refractory nozzle,refractory materials. From a refractory bricks manufacturing factory, Changxing has become a professional manufacturer with various refractory materials and oil fracturing proppant both in domestic and international market during 30+ years, whose customers covers North America, Middle East, Asia, Africa, etc.

The artilce source: http://www.chinafirebrick.com/Company_News_96.html