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20-80t LF ladle metallurgy furnace, 1 Efficient/durable Furnace, 2 Energy Saving, 3 Top Quality and Lower Price - details see: https://www.machineto.com/20-80t-lf-ladle-metallurgy-furnace-lf-vd-vod-10159058

20-80t LF ladle metallurgy furnace (LF, VD ,VOD)
Production description and function

Ladle refining furnaces (LF) are used to desulfurize steels, remove other impurities and hold the molten steel for casting operations. Without LRFs, higher tap temperatures are normally required from steel making furnaces due to heat losses during refining with conventional ladles.Costs of extended furnace time, refractory wear and power or fuel consumption can all be reduced using LRFs to perform holding and refining.Reduced scrap melting capacity in basic oxygen furnaces (BOF) is another disadvantage of higher tap temperatures.

The ladle refining furnace also acts as a buffer between the steel making furnace (either BOF or electric

arc furnace (EAF)) and the continuous caster, reducing casting costs and allowing greater flexibility in steel making operations.

Application and Benefits:

Ladle refining furnaces are used to increase productivity in steel-making operations. By allowing the steel making furnaces to be used exclusively as melting units, tap-to-tap times are decreased, increasing the production capacity and decreasing overhead costs per ton of steel produced. Flexible scheduling can result with LRFs, steel can be held at the proper temperature while waiting for casting availability.

Ladle refining furnaces are used for the following refining processes:

• Homogenization. Temperature and composition are equalized by stirring.
• Inclusion Flotation. Non-metallic inclusions can be removed by gentle stirring of the metal. Oxygen levels of 10 parts per million (ppm) or less have been obtained.
• Desulfurization. Synthetic slags can desulfurize from 0.02 percent to less than 0.003 percent in about thirty minutes. Desulfurization can also be accomplished by injection of CaSi or fluxes. Generally, 20 pounds per ton of a CaO-A1203 slag is used.
• Vacuum degassing. Hydrogen content can be reduced to 2ppm or less.
• Decarburization. Low carbon steel and stainless steels ( 0.01 percent) can be produced by decarburization under vacuum.
• Dephosphorization. Dephosphorization to 0.002 percent has reportedly been achieved with special

• 20-80t LF ladle metallurgy furnace (LF, VD ,VOD)

LF series Ladle industrial refining furnace Technical parameter

Furnace type	Ladle diameter mm	Capacity	Transformer rated power KVA	Electrode diameter mm	Electrode pitch circle diameter	Molten steel Temperature raising speed
		Rated/Max. /t
LF-15(single arm)	2000	15/16	3200	250	460	≥3
LF-20(single arm)	2500	20/24	4000	250	460	≥3
LF-30(single arm)	2700	30/35	5500	300	550	≥4
LF-40(single arm)	2900	40/46	8000	300	550	≥4
LF-50(tribrachia)	3000	50/58	10000	350	620	≥4
LF-60(tribrachia)	3150	60/70	12500	350	620	≥4
LF-70(tribrachia)	3200	70/80	14000	400	680	≥4
LF-80(tribrachia)	3300	80/90	15000	400	680	≥4
LF-90(tribrachia)	3400	90/100	16000	400	680	≥4
LF-10(tribrachia)	3500	100/115	18000	450	740	≥4
LF-120(tribrachia)	3600	120/135	21000	450	740	≥4
LF-15(tribrachia)	3900	150/170	25000	450	740	≥4
LF-18(tribrachia)	4000	180/200	36000	500	820	≥4
LF-200(tribrachia)	4200	200/220	38000	500	820	≥4