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Class Information
Number: 373/81
Name: Industrial electric heating furnaces > Arc furnace device > Charging or discharging > Top charging
Description: Subject matter including specific means to charge the furnace from the top.

Sub-classes under this class:

Class Number Class Name Patents
373/82 Through electrode 34

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8506230 Distributor device Aug. 13, 2013
7776253 Installation for supplying materials into metallurgical unit Aug. 17, 2010
6801563 Apparatus to manipulate scrap in a scrap charger Oct. 5, 2004
6438154 Method and apparatus for recovering metal values from liquid slag an baghouse dust of an electric arc furnace Aug. 20, 2002
6389054 Scrap charger May. 14, 2002
6347110 Charging device for low blast furnaces Feb. 12, 2002
6335945 Electric ARC low-shaft smelting furnace with a central tube with telescopic electrodes and a sliding upper receptacle lid Jan. 1, 2002
6269112 Electric arc furnace for continuous charging with ferrous materials and semicontinuous tapping of molten steel Jul. 31, 2001
6235075 Method and device for producing silicon-rich foundry iron May. 22, 2001
6155765 Bulk loader Dec. 5, 2000
6136060 Low cost high speed titanium and its alloy production Oct. 24, 2000
6004504 Method and apparatus for controlling bath level and measurement of bath characteristics Dec. 21, 1999
5879617 Apparatus for treating waste materials Mar. 9, 1999
5812587 Apparatus and method for the supply of molten metal Sep. 22, 1998
5533043 Installation for producing liquid metal by melting scrap iron Jul. 2, 1996
5513206 Apparatus for preheating and charging scrap materials Apr. 30, 1996
5500870 Process and device for the extraction of valuable substances Mar. 19, 1996
5479435 DC arc furnace Dec. 26, 1995
5410566 Method of producing metal melts and an electric arc furnace therefor Apr. 25, 1995
5375139 Electric arc furnace insitu scrap preheating process Dec. 20, 1994
5218617 Apparatus for feeding iron-bearing materials to metallurgical furnaces Jun. 8, 1993
5153894 Smelting plant with removable shaft-like charging material preheater Oct. 6, 1992
5117438 Method of operating a smelting unit and smelting unit for that method May. 26, 1992
5046145 Improved arc reactor with advanceable electrode Sep. 3, 1991
4995051 Smelting furnace and method for feeding material to be processed therein Feb. 19, 1991
4870655 Apparatus for recovery of metallics and non-metallics from spent catalysts Sep. 26, 1989
4866731 Electric furnace arrangement Sep. 12, 1989
4841542 Electric furnace arrangement Jun. 20, 1989
4763337 Process for melting particulate material Aug. 9, 1988
4702461 Charging electro furnaces Oct. 27, 1987
4697274 Electric melting furnace arrangement as well as a method of influencing the composition of a mineral melt for producing wool Sep. 29, 1987
4694465 Apparatus for automatically charging scrap into an arc furnace Sep. 15, 1987
4674102 Electric arc furnace Jun. 16, 1987
4662526 Hoisting mechanism for the cover of a furnace May. 5, 1987
4653065 Preheating mechanism for use with duplex electric-arc furnace system Mar. 24, 1987
4617672 Electric furnace arrangement Oct. 14, 1986
4569057 Material feed system for smelting furnaces Feb. 4, 1986
4537551 Method and means of charging electrothermic smelting furnaces Aug. 27, 1985
4476564 Gas exhaust nozzle for arc furnaces Oct. 9, 1984
4468164 Method and apparatus for feeding raw material to a furnace Aug. 28, 1984
4455660 Inclined arrangement of the support surfaces of a furnace body and furnace lid for electric arc furnaces Jun. 19, 1984
4451925 Charging system for electric arc furnaces May. 29, 1984
4435815 Method and apparatus for charging a furnace Mar. 6, 1984
4423515 Electric furnace Dec. 27, 1983
4414673 Plasma melting furnace Nov. 8, 1983
4402083 Electric smelting furnace and associated charging equipment and bins Aug. 30, 1983
4395023 Shroud for steel making electric-arc furnace Jul. 26, 1983
4393507 Method and apparatus for charging lime into an electric arc furnace Jul. 12, 1983
4385918 Method and apparatus for feeding raw material to an arc furnace May. 31, 1983
4347614 Apparatus for refining ferrosilicon Aug. 31, 1982

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