Congratulations to the successful ALUMINIUM CHINA EXHIBITION, which held in Jul 12th – 14th in shanghai.
ALUMINIUM CHINA is a quite important promotion event which ZHENGJIANG INSERTEC FOUNDRY takes part every year, and certanly it is also a big and wide-influenced exhibition of the non-ferrous industry.
During the three days, everyone plays and indispensablee role.
There is no doubt that the success of the exhibition can not take away from the efforts made by whole team!! hope that brings more huge benefits for ZHENJIANG INSERTEC FOUNDRY SUPPLIES- ZIFS.
The dictionary defines a cupola as a domed roof, a gun turret or a vertical cylindrical Furnace to melt metal to further refine it in other furnaces, or to cast it into useful shapes. The editors of Encyclopedia Britannica claim that René-Antoine Ferchault de Réaumur built the first cupola furnace on record, in france, About 1720. Cupola melting is still recognized by some as the most economical melting process if the furnace is operated continuously. A lot of grey iron is still melted and cast by this method. Improvements in the process over the last 200 years have included the construction of the larger furnaces and the application of the heated air at the tuyeres. Many foundries however as we shall see have invested in other more modern furnace designs and INSERTEC are able to supply a complete range of refractory lining products for all.
Cupolas were traditionally lined with brick but in the last 50 years many of these units and other vertical shaft furnaces have switched to monolithic linings because the quality and availability of monolithic refractories have improved enormously and they are more cost effective when properly engineered and expertly installed.
At the top of the furnace the refractories must resist mechanical and thermal shock while in the lower part of the lining the most important properties are the ability to resist attack from molten metal and slag at elevated temperature. Intermittently operated furnaces are sometimes cleaned and given a protective wash on the hot face each day but continuously operated units must be constructed from premium products for long life and low cost.
INSERTEC, have a complete range of monolithics for the original linings of both ferrous and non ferrous furnaces of all sizes and you are invited to contact us for precise recommendations.
For economic and operational reasons many ferrous and nonferrous foundries have more recently invested in crucible and induction furnaces for melting and casting their products.
Crucible furnaces are one of the oldest and also one of the simplest types of melting unit used in a foundry where small batches of low melting point metal or alloys are required. The charge is placed in a refractory crucible and heated mainly by conduction through the walls of the crucible using gas oil or electricity as the fuel. Most modern foundries however use electric induction furnaces for the efficient melting of both ferrous and non ferrous metals and alloys and these have largely now replaced crucible furnaces especially for elting of high melting point alloys such as cast iron and steel. Induction furnaces are generally easier to control with regard to temperature and chemistry and better suited to the enviorement.
Written by Eate From U.K.
The metallurgy of iron ever needs faster melting processes. This fact make furnaces with high current density near the periphery of the lining ; for this reason the temperature in this area suffering the effects of overheating and logical sudden cooling of fusion process.
When lining has a good resistance to thermal shock will cause cracks, if dosent close, they are the way of metal infiltration. These metal penetrations can compromise the final performance of all lining.
INSERTEC, have developed a complete range of CUARSIL IS6 PAN, with some improved performance thermomechanical that means, better resistance of the lining to the formation of cracks.
These properties have been got with a very studied particle size of the product and the mix of different qualities of quartzite for get the optimum mineralogy of the product.
This new development enables the lining of induction furnace to behave better against sudden changes in temperature, higher demands power from fusion of the furnace and, ultimately, getting to increase the service life of the refractory lining.