{"id":2398,"date":"2026-06-30T08:59:01","date_gmt":"2026-06-30T08:59:01","guid":{"rendered":"https:\/\/hydrauliccylindersprice.com\/product\/electric-furnace-mast-cylinder\/"},"modified":"2026-06-30T08:59:12","modified_gmt":"2026-06-30T08:59:12","slug":"electric-furnace-mast-cylinder","status":"publish","type":"product","link":"https:\/\/hydrauliccylindersprice.com\/sk\/product\/electric-furnace-mast-cylinder\/","title":{"rendered":"Electric Furnace Mast Cylinder"},"content":{"rendered":"

<\/p>\n

<\/p>\n

\n
\n
\n Electric Furnace \u00b7 Mast Cylinder<\/span>
\n 6th of 6 \u2014 EAF Family Complete<\/span>\n <\/div>\n

The Heavy Lifter
That the Servo Rides On<\/h2>\n

The electrode lifting cylinder (#18) fine-adjusts electrode height by millimetres, thousands of times per heat. But it can only adjust within the range that the mast cylinder (#19) provides. The mast cylinder is the platform \u2014 it raises and lowers the entire electrode mast structure by metres<\/em>, setting the coarse vertical range from which the servo cylinder fine-tunes. Without the mast cylinder, the servo has nowhere to operate.<\/p>\n

\n
\n
581 KN<\/div>\n
Thrust<\/div>\n<\/div>\n
\n
300mm<\/span><\/div>\n
Bore<\/div>\n<\/div>\n
\n
230mm<\/span><\/div>\n
Rod (76.7%)<\/div>\n<\/div>\n
\n
Coarse<\/div>\n
Range Positioning<\/div>\n<\/div><\/div>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

\n

Two-Level Electrode Height Control<\/h2>\n

The electrode height system uses a two-level architecture \u2014 like a telescope with coarse and fine focus wheels. The mast cylinder sets the coarse range; the lifting cylinder fine-tunes within that range. Neither can do the other’s job effectively.<\/p>\n

\n
\n
\n

Mast Cylinder #19 \u2014 Coarse Range<\/h3>\n<\/div>\n
\n

Moves the entire mast column \u2014 electrode arm, electrode clamp, electrode, and all supporting structures \u2014 by metres. Used for electrode replacement (raise mast to withdraw stub, lower mast to insert new column), initial positioning before arc striking, and gross height adjustment when the scrap charge level changes dramatically (e.g. after charge collapse).<\/p>\n

\n 300 mm bore<\/span>
\n 581 KN<\/span>
\n Metres of travel<\/span>
\n Intermittent<\/span>\n <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
\n
\n

Lifting Cylinder #18 \u2014 Fine Servo<\/h3>\n<\/div>\n
\n

Adjusts the electrode height by millimetres \u2014 continuously, automatically, under closed-loop arc impedance control. Operates within the vertical range that the mast cylinder has established. Does not lift the mast structure \u2014 only adjusts the electrode position relative to the mast via the electrode arm mechanism.<\/p>\n

\n 100 mm bore<\/span>
\n 53 KN<\/span>
\n Millimetres<\/span>
\n Continuous servo<\/span>\n <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n

Korea Ever-Power manufactures both cylinders as part of the electrode height control system within the electric furnace cylinder family<\/a>. Ordering the mast and lifting cylinders together ensures mechanical and hydraulic compatibility across the two-level system.<\/p>\n<\/section>\n

<\/p>\n

\n \"Electric
\n<\/section>\n

<\/p>\n

\n

Technical Specifications<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
Product<\/td>\nElectric Furnace Mast Cylinder<\/td>\n<\/tr>\n
Function<\/td>\nRaise\/lower the electrode mast column<\/td>\n<\/tr>\n
Bore Diameter<\/td>\n300 mm<\/td>\n<\/tr>\n
Rod Diameter<\/td>\n230 mm (76.7% of bore)<\/td>\n<\/tr>\n
Working Pressure<\/td>\n14 MPa<\/td>\n<\/tr>\n
Maximum Thrust<\/td>\n581 KN<\/td>\n<\/tr>\n
Quantity per Furnace<\/td>\n3 (one per electrode mast)<\/td>\n<\/tr>\n
Certification<\/td>\nISO 9001 \u00b7 100% hydrostatic tested<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<\/section>\n

<\/p>\n

\n

Managing the Electrode’s Lifecycle \u2014 The Mast Cylinder’s Primary Job<\/h2>\n

Graphite electrodes are consumables \u2014 they burn away during melting at a rate of 1\u20133 kg per tonne of steel produced. A 6-metre electrode column lasts approximately 8\u201324 heats before it is consumed to a stub and must be replaced. The mast cylinder manages every stage of this lifecycle:<\/p>\n

\n
\n
\n
1<\/div>\n
<\/div>\n<\/div>\n
New electrode installed \u2014 mast at mid-position<\/strong><\/p>\n

A fresh 6-metre electrode column is clamped into the electrode holder. The mast cylinder positions the mast at approximately mid-stroke \u2014 low enough for the electrode tip to reach the scrap charge, high enough to leave room for the lifting cylinder (#18) to fine-adjust during melting.<\/p>\n<\/div><\/div>\n

\n
\n
2<\/div>\n
<\/div>\n<\/div>\n
Melting progresses \u2014 electrode shortens \u2014 mast lowers progressively<\/strong><\/p>\n

As the electrode burns away during each heat, it becomes shorter. After several heats, the lifting cylinder reaches the bottom of its fine-adjustment range \u2014 the electrode can no longer reach the bath surface. The mast cylinder lowers the mast by 200\u2013500 mm, resetting the lifting cylinder to mid-range. This coarse re-centring happens 3\u20138 times over the electrode’s life.<\/p>\n<\/div><\/div>\n

\n
\n
3<\/div>\n
<\/div>\n<\/div>\n
Electrode consumed to stub \u2014 mast raises for replacement<\/strong><\/p>\n

When the electrode is consumed to its minimum usable length (the stub, typically 0.5\u20131 metre), the mast cylinder raises the mast to withdraw the stub above the cover level. A crane lifts the stub out and positions a new electrode column in the holder.<\/p>\n<\/div><\/div>\n

\n
\n
4<\/div>\n<\/div>\n
New column added \u2014 mast lowers to operating position \u2014 cycle repeats<\/strong><\/p>\n

Sometimes a new electrode segment is nippled (threaded) onto the remaining stub instead of replacing the entire column. The mast cylinder raises the stub above the cover, the new segment is attached, and the mast lowers the now-extended column back to operating height.<\/p>\n<\/div><\/div>\n<\/p><\/div>\n<\/section>\n

<\/p>\n

\n
\n

What the Mast Cylinder Lifts \u2014 It Is Not Just an Electrode<\/h2>\n

The mast is a vertical column or guide frame that carries the entire electrode assembly. The mast cylinder does not lift an electrode in isolation \u2014 it lifts everything attached to the mast:<\/p>\n

\n
\n Electrode column (1\u20135 tonnes)<\/strong><\/p>\n

The graphite electrode itself \u2014 300\u2013750 mm diameter, 3\u20138 metres long depending on how much has been consumed. Weight varies with diameter and remaining length.<\/p>\n<\/p><\/div>\n

\n Electrode holder and clamp (2\u20138 tonnes)<\/strong><\/p>\n

The copper or steel clamp that grips the electrode and conducts the arc current from the power cables into the graphite. Includes the clamping mechanism (spring or hydraulic), the contact pads, and the water-cooling circuits that prevent the clamp from overheating.<\/p>\n<\/p><\/div>\n

\n Electrode arm (5\u201315 tonnes)<\/strong><\/p>\n

The horizontal beam connecting the electrode holder to the mast column. Carries the full weight of the electrode and holder at the end of a cantilever. The arm also carries the water-cooled high-current bus tubes and the lifting cylinder (#18) that provides fine regulation.<\/p>\n<\/p><\/div>\n

\n Mast structure and guides (3\u201310 tonnes)<\/strong><\/p>\n

The mast column itself, including the guide rails or roller guides that keep the mast aligned vertically as it raises and lowers. The total assembly \u2014 electrode + holder + arm + mast \u2014 can weigh 10\u201340 tonnes per electrode position.<\/p>\n<\/p><\/div>\n<\/p><\/div>\n

The 581 KN thrust at 300 mm bore and 14 MPa provides the force to raise this combined 10\u201340 tonne load, with a safety margin for dynamic loads during charge collapse events (when the scrap suddenly shifts and impacts the electrode). Contact the hydraulic cylinder engineering team<\/a> for mast cylinder specifications.<\/p>\n<\/p><\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"

Electric furnace mast cylinder \u2014 the heavy-lift actuator that raises and lowers the entire electrode mast column. While the electrode lifting cylinder (#18) fine-adjusts electrode height by millimetres during melting, the mast cylinder moves the entire mast structure by metres \u2014 for electrode replacement, initial arc striking position, and consumed-stub withdrawal. These two cylinders form a two-level height control architecture: the mast cylinder sets the coarse range, the lifting cylinder fine-tunes within that range. Bore 300 mm, rod 230 mm, 14 MPa, 581 KN. The sixth and final cylinder in the EAF system. Korea Ever-Power. ISO 9001. OEM & ODM.<\/div>","protected":false},"featured_media":2399,"comment_status":"closed","ping_status":"open","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[852],"product_tag":[],"class_list":["post-2398","product","type-product","status-publish","has-post-thumbnail","product_cat-industrial-engineering-hydraulic-cylinders","pa_editor-cxm","first","instock","product-type-simple"],"_links":{"self":[{"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/product\/2398","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/comments?post=2398"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/media\/2399"}],"wp:attachment":[{"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/media?parent=2398"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/product_brand?post=2398"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/product_cat?post=2398"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/hydrauliccylindersprice.com\/sk\/wp-json\/wp\/v2\/product_tag?post=2398"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}