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UHP Graphite Electrodes

UHP Graphite Electrodes

Classification:PRODUCTS
  • Description:What is UHP? UHP Graphite Electrode is an abbreviation for Ultra High Power Graphite Electrode. UHP graphite electrode is used for the recycling of steel in the electric arc furnace industry. Its main ingredient is high-value needle coke.
Detailed Description


What is UHP? 

UHP Graphite Electrode is an abbreviation for Ultra High Power Graphite Electrode. UHP graphite electrode is used for the recycling of steel in the electric arc furnace industry. Its main ingredient is high-value needle coke which is made from either petroleum or coal tar. Graphite electrodes are finished with a cylinder shape and machined with threaded areas at each end. In this way, the graphite electrodes can be assembled into an electrode column using electrode nipple.
 
In order to meet the requirement of higher work efficiency and lower total cost, large capacity ultra-high power arc furnaces are becoming more and more popular. Because of this, UHP graphite electrodes with diameters of over 500 mm will dominate market.
 
Graphite electrodes are mainly used in electric arc furnace. They are presently the only products available that have the high levels of electrical conductivity and the capability of sustaining the extremely high levels of heat generated in EAF. Graphite electrodes are also used to refine steel in ladle furnaces and in other smelting processes. Graphite electrodes are divided into 4 Types: RP Graphite electrodes, HP Graphite electrodes, SHP Graphite electrodes, UHP Graphite electrodes.
 

basic raw materials

The production of graphite electrodes uses two basic raw materials: calcined petroleum needle coke and coal tar pitch. 
In the steelmaking process, iron scrap gets melted in an electric arc furnace and recycled. Graphite electrodes, a kind of conductor, are an essential component in this kind of furnace. They can melt scrap at a temperature of about 1600℃.
 

Specification of UHP graphite electrode

Item Unit UHP
300-600mm 650-800mm
Electric resistivity Electrode μΩm 4.8-5.8 4.6-5.8
Nipple 3.8-4.5 3.8-4.5
Flexural strength Electrode Mpa 10.0-14.0 10.0-14.0
Nipple 20.0-26.0 22.0-26.0
Elastic modulus Electrode Gpa 9.0-13.0 10.0-14.0
Nipple 15.0-18.0 15.0-18.0
Bulk density Electrode ≥g/cm3 1.68-1.74 1.70-1.74
Nipple 1.77-1.82 1.78-1.84
CTE(100-600℃) Electrode x10-6/℃ 1.1-1.4 1.1-1.4
Nipple 0.9-1.2 0.9-1.2
Ash   0.3 0.3
 

Feature

  • Withstand large currents, high discharge rate.
  • Good dimension stability, not easy to deform.
  • Resistant to cracking & spalling.
  • High resistance to oxidation and thermal shock.
  • High mechanical strength, low electrical resistance.
  • High machining accuracy, good surface finishing
 

What furnace is UHP used in?

Graphite electrodes are widely used for production of alloy steels, metal and other nonmetallic materials, etc.
DC electric arc furnace,which require 1 column of graphite electrodes. High maximum current density. The diameter of these electrodes is getting bigger: the current maximum diameter is 32 inches (801 mm).
AC electric arc furnace.For AC Furnaces (alternating current furnaces) / Size: 16-28 inches.
Ladle furnace.For LF Furnaces (refining furnaces) / Size: 10-18 inches.
Submerged arc furnace.
 

Shipping & Delivery

To protect the end face and thread of the electrode, the electrode shall not be transported directly by steel hook to hooking.

 

Market growth trend

Ultra-high power graphite electrode is expected to grow at the highest volume CAGR of 4.1% over the forecast period. 

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