In the case of Calorised pipes, the metal existing at the surface of the diffused zone is oxidized to its respective oxide, which prevents the further progress of oxidation and also melting. Hence diffused, aluminum is oxidized to alumina, which has very high melting pint such as 2050⁰C compared to the melting point of aluminum, which is 658⁰C.

 

This is the essential difference between ceramic coated pipes and joint Calorised pipes. A more effective result is obtained by ceramic coating on the metal diffused zone.

In the process of steel manufacturing by electric furnace, the consumption rate of lance pipes for oxygen injection show rather high ratio to high temperature and severe oxidation. In general, steel pipes are used as lance pipes for oxygen / carbon injection. If MS pipes are treated by this Calorised process, consumption rate of lance pipes will improve 6-7 times. The advantages of oxygen steel making process are:

 

• The exothermic reaction and agitation promote decarbonisation and heat rise in the furnace, while foaming slag can be
• Fusion of sub material can be accelerated
• Quality of steel will be
• As the process raises the temperature of furnace, it leads to saving in electric
• Selection of raw materials to be charged becomes
• The process raises the production capacity of an electric
• Hydrogen, Nitrogen and non-metallic inclusions can be eliminated through
• It makes it possible to recover chrome with the use high chrome steel

Hence oxygen lancing is a must in steel making. Efficient lancing makes cleaner and cheaper steel. Therefore a Calorised pipe for oxygen lancing is the most efficient and simple alternative to achieve the above advantage.   Besides there are industrial advantages:- Lower Down Time As infrequent replacement is required the down time is reduced directly by 6 times. This brings a minimum savings of 15 mins. Per heat and at 17/18 heats a day it translates into 255 mins., ie. 4.25 hrs/day . This is equal to 600 hrs/year.   This saving of 600 hrs/years gives the following,  

• Savings in Electricity Cost equivalent to 1326 hrs/year.
• Savings in Labour Cost 1326 hrs/year.
• Higher yield equivalent to 1326 hrs/year.
• Lower Inventory
• Lesser space for storage of Calorised Lancing

  Therefore it is prudent to use Calorised Pipes for Lancing especially in the charged scenario of the open economy where for any industry to survive in competition it is necessary to increase efficiency, quantity and decrease costs. Comparison Chart Between Mild Steel Pipe & Calorised Pipe for oxygen lancing under same condition of oxygen pressure and flow rate, Method of Usage  It is considered ideal to fix a Calorised lancing pipe to a lifting hook or stand or an automatic manipulator and insert it through the sight hole on the door at an angle of 25⁰C to 30⁰C to the surface of molten steel and hold the end of pipe at a depth of 150mm below the slag. Oxygen or carbon can then be injected, controlling the pressure, flow rate and the injection rate ofpipes. Availability & Size Pipes are available in threaded or plain end. Threaded ends are fixed with one coupling and one PVC cap. The Pipes are packed in HDPE bags. Packing Details