Refractories for non-ferrous metals
Metal melting technology has always been advancing.
Graphite crucible brought the revolution of the crucible production in the middle of 19th century. Nippon Crucible Co., Ltd. has started with the graphite crucible manufacturing and having the product line-up of refractory bricks, monolithic refractories and various products with the technology and know-how based on metal melting. Metal melting technology has been progressing with the evolution of refractory.
Trying new applications
Since the corporate establishment, we have been putting the power to the product development to meet the needs of each generation. Thanks to our highly developed technologies and various know-how, we have successfully realized new products which were hard to support.
▶Metal melting
■ Energy saving vertically grooved crucible “ZEBRAX”
Vertical grooves around the surface will increase thermal efficiency. About 5 to 10% energy saving and shorter melting time can be expected compared with our ordinal crucible. --- Toyota Prize/Japan Foundry Engineering Society
■ Carbon Bonded SiC Graphite Crucible “PHOENIX”
We realize stable performance improvement based on our unique technology built up over a century since the corporate establishment.
▶Melt holding and heat retention
■ Immersion heater tube
(Thermo tube)
We have reached the higher technology to hold molten aluminum and keep its temperature. Indirect heat from the inside of the tube will secure stable metal quality.
We succeeded to develop special crucible “CANISTER” for the first time in Japan. This melts low-level radioactive waste from nuclear power stations.
▶Special alloys
■ Crucible for higher frequency induction furnace
“WHITE PHOENIX”.
Special crucible for vacuum melting. This crucible well adapt to the needs for various metal melting.
▶For cast iron, cast steel and special alloys
■ High purity zirconia crucible “ZIRCONIX”.
Higher resistant to the cracking at higher melting temperature. 90% of the normal strength at room temperature can be exhibited even at 1,500 ℃.
Iron and steel making
Adapting to advanced requirement to realize stable operation.
We provide monolithic refractories mainly for trough material for blast furnace and the functional refractory for continuous casting application.
▶Trough material for blast furnace
■ Monolithic refractory for iron and steel making
We have product line to meet various operating conditions and clear the various requirements.
Refractory product line for ferrous (Cast iron and cast steel)
We will move forward to develop advanced products to satisfy high level needs.
We are pushing forward to the development of products to meet high standard requirements.Both cast iron and cast steel are made from pig iron after removing their impurities and those are used for foundry. Cast iron contains approximately 2% to 6% of carbon. And approximately 1% or less carbon will make high strength cast steel. Our refractory adapts itself to the higher needs of cast iron and cast steel foundry process and realize stable operation.
▶Metal pouring and metal flow control
■ Stopper head
Stabilizing poring process and prolonging the life.
▶Cupola
■ Special bricks for Cupola
(Carbon block, SC block)
We have knowledge of Cupola’s structure and function to adapt to long term cupola operation.
Incinerator and fusion furnace
Special refractory products line.
The incinerator converts poisonous ash from burnable waste process to non poisonous ash. The fusion furnace melts incombustibles made from the combustion of industrial raw material, waste and ash with very high temperature. We also provide various refractories for these applications.
A production line of monolithic refractories
in the Toyota Plant
production line of shaped refractories in
the Osaka Plant
