7/21/2019 Introduction to Magnetic Heating of Billets by Stead Fast Engineers Pvt Ltd

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INTRODUCTION TO MAGNETIC HEATING

OF BILLETS BY STEAD FAST ENGINEERS

PVT LTD

INTRODUCTION

In July 2008 the new innovation  – magnetic billet heater – was put into business operation in Germany

(German aluminum expulsion works Weserlau GmbH and Co. KG). The second framework has been

requested by Italian backup of Sapa in Bolzano. The beginnings of this innovation can be found in 2004.

Organizations Zenergy Power and Bültmann got financing from Germany's ecological financing

organization DBU to add to another innovation for billet heating. The main model was appeared in April2005 at the Hannover Fair. Further with the support from the DBU, the gadget was produced and put

into administration at Wese

HISTORY AND ADVANTAGES OF MAGNETIC HEATING :

In July 2008 the new innovation  – magnetic billet heater – was put into business operation in Germany

(German aluminum expulsion works Weserlau GmbH and Co. KG). The second framework has been

requested by Italian backup of Sapa in Bolzano. The beginnings of this innovation can be found in 2004.

Organizations Zenergy Power and Bültmann got financing from Germany's ecological financing

organization DBU to add to another innovation for billet heating. The main model was appeared in April

2005 at the Hannover Fair. Further with the support from the DBU, the gadget was produced and put

into administration at Wese.

CONVENTIONAL INDUCTION HEATING (AC HEATING) :

Electrically conductive materials are today heated or dissolved in routine incitement heating gadgets.

Billet is put inside copper curl. The curl is supplied by AC current and creates electromagnetic field that

alters course in time. The field affects vortex currents in the workpiece (Faraday's law) what's more,

vortex currents heat up the billet because of its electrical resistivity (Joule's law). In both parts of the

gadget (inductor loop, workpiece) electrical misfortunes happens. The heating of the curl is the principle

wellspring of vitality misfortunes in traditional AC incitement heating frameworks. Thus, loop must becooled with water to keep from softening. The degree of the misfortunes relies on upon the proportion

of the resistances of the loop and the billet. The proficiency of the framework is 50 – 60%. Traditional

gadgets have a few impediments. Air conditioning heaters working with basic force network frequencies

create whirlpool currents for the most part near to the surface of the workpiece – it delays the time of

heating. AC induction heating further requires a medium voltage power supply and VAR compensation.

DC MAGNETIC HEATING :

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Magnetic heater in Weserlau comprises of DC fueled superconductive magnetic curl cooled to low

temperature. The loop produces an adequately solid magnetic field with a force information of 10W.

Magnetic field of a DC fueled curl is not fluctuating in time, the billet is pivoted inside of the field in

request to affect vortex currents. Vortex currents work to contradict the revolution and make an in

number braking torque. This is overcome by mechanical electric engines of a size of 100 –

  50 kW.Engines are supplied by standard recurrence converters (misfortunes 2-3% of the aggregate influence

utilization of the heater). Cooling framework and power supply devour around 13 kW, the aggregate

productivity (counting all misfortunes brought on by fringe specialized gadgets) is more prominent than

80%. The heating procedure is speedier, more homogeneous Furthermore, exactly controllable. The

framework doesn't require expansive cooling establishments, complex vitality supply and VAR pay. The

heater comprises of four fundamental parts  –  superconducting magnet, refridgerator, engine and

heating chamber. The fundamental part is the superconducting magnet that is kept at its working

temperature by the refridgeration framework. The billets pivot in two thermally protected heating

chambers, the rotational vitality is given by electric engines on either side. The engines can slide in also,

out to oblige diverse billet lengths. No segment in the heater is subjected to noteworthy temperatureexpand, vibrations or some other mechanical anxiety compone

MAGNETIC HEATING ADVANTAGES:

  Low frequencies

  Wide material range

  Temperature tapers

  Low maintenance requirements

  Reliabilit