VAIBH METALLURGICAL SOLUTIONS PVT. LTD.

VAIBH METALLURGICAL SOLUTIONS PVT. LTD.

ph: M : +91 9903282000
vmsplindia@gmail.com

Vacuum Degassing

"VMSPL INDIA being a well estabilished & Leading Exporter, Manufacturer , Supplier of Vacuum Degassing (VD) Plant Technology for high quality Steel production, our technology is gives consitent efficiency & performance " . We also revamp the old vacuum system with the performance oriented system especially replace old steam ejector system with latest mechanical type pumps.

"VMSPL Offers Clean & Low Carbon STEEL TECHNOLOGY At Very Cometitive Plant Cost" :

VACUUM DEGASSING(VD) TECHNOLOGY: The purpose, of using Vacuum Degassing Process on Liquid Steel , is as following :

• To reduce hydrogen level of the liquid metal to safer levels for FORGING.

• Effective elimination of inclusions & to improve cleanliness of stee

l• Homogenisation of molten metal

•Reduction of Sulpher, Nitrogen & Oxygen level

Thus VD is used for improvement in quality of Liquid Steel

ESTABLISHED DATA ACHIEABLE AFTER PROPER VD/VOD PROCESS :
• Reduction of sulfur content in steel < 50 ppm;
• Receiving of steel with carbon content < 0,003%;
• Reduction of nonmetallic inclusions content in steel < 0,002%;
• Reduction of nitrogen content in steel < 40 ppm;
• Reduction of hydrogen content in steel 1,5 ppm;
• Oxygen content in steel < 30 ppm.

VACUUM OXYGEN DECARBURIZATION (VOD) TECHNOLOGY: The purpose of the VOD is to bring changes in the chemical composition of Liquid Steel . As evident , from the process name , Oxygen is used , under Vacuum , in the Vacuum Oxygen Decarburisation Process. Following types of steel are produced from VOD :

• Very low carbon Stainless Steel , using high carbon ferro chrome.

• Economic production of all ELCN ( Extra Low Carbon ,Nitrogen) grades.

VCD ( Vacuum Carbon Decarburization) & VD are the further steps performed on the Liquid Steel .

TYPES OF VD/VOD EQUIPMENTS , VMSPL SUPPLIES ON TURNKEY BASIS :

1. LADLE DEGASSING : These equipment are quite useful for Small Batch Of Liquid Steel. The Suction Volume is quite low & due to this Vacuum Pump suction capacity is reduced signifacntly. Ladle Degassing is usuful for Steel Plants based on small EAF / Induction Furnaces & can be supplied upto 20T Capacity.

2.TANK DEGASSING : In Tank/Vessel Degassing the Ladle is placed into a fixed Tank/Vessel .Due to this quite intensive argon stirring is possible. Also leakage issue (observed in Ladle Degassing , if Ladle Flange is not clean) are not encountered.

All large capacity steel plants are equipped with Tank Degassing facilities.

3. VACUUM INDUCTION MELTING(VIM) AND CASTING(VIC) :

Melting, charging, metallurgical treatment take place under vacuum
Precise setting of analysis tolerances in the closest possible range
No redox reactions of expensive alloying elements
Excellent macro-cleanliness, good micro-cleanliness
Optimum temperature control
Excellent homogenization by means of bottom stirring and induction stirring
Removal of dissolved gases e.g. oxygen, hydrogen, nitrogen

3. VACUUM INGOT CASTING(VIC) : This is a modern method for Casting of Ingots Under Vacuum. The salient features of this process are :

a. Temperature losses associated with other VD processes are avoided.

b. In the process streams degassing is applicable , which results in lower level of Hydrogen in the ingot.

c. The biggest advantage from this process is that we can cast bigger size of the Ingots form the furnace capacity , by providing additional liquid metal for the process.

As an example , if there are one EAF of 150T Capacity & two LFs of 150T Capacity , then it is possible to cast 450T Capacity Ingots , normally required for power plants.

VACUUM GENERATION UNITS : For creating vacuum , we design our system on following variants of equipments :

1. STEAM EJECTOR SYSTEM : This system is based on Ejectors & Condensers for creating vacuum. As there are very few moving parts in the ejectors , this is quite robust & reliable. This system is prefered where availability of water is abundant.

2. MECHANICAL PUMPS : This system comprises of different types of Mechanical Pumps arranged in different sequences. This system is catching up very fast with Ejector based System as their have been several developments in recent past.

3. COMBINATION OF EJECTOR & MECHANICAL PUMPS : This is a system in which both Ejectors & Mechanical Pumps are used . Mechanical pumps are used in the last stage , reducing the steam consumption & wastage .

VAIBH METALLURGICAL SOLUTIONS PVT. LTD.

ph: M : +91 9903282000
vmsplindia@gmail.com