GB1386555A - Reheating furnace - Google Patents

Reheating furnace

Info

Publication number
GB1386555A
GB1386555A GB744473A GB744473A GB1386555A GB 1386555 A GB1386555 A GB 1386555A GB 744473 A GB744473 A GB 744473A GB 744473 A GB744473 A GB 744473A GB 1386555 A GB1386555 A GB 1386555A
Authority
GB
United Kingdom
Prior art keywords
zone
air
zones
discharge
furnace
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB744473A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midland-Ross Corp
Original Assignee
Midland-Ross Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US23561072 priority Critical patent/US3819323A/en
Application filed by Midland-Ross Corp filed Critical Midland-Ross Corp
Publication of GB1386555A publication Critical patent/GB1386555A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0037Rotary furnaces with vertical axis; Furnaces with rotating floor
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/74Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
    • C21D1/76Adjusting the composition of the atmosphere

Abstract

1386555 Gas fired reheating furnace MIDLAND-ROSS CORP 15 Feb 1973 [17 March 1972] 7444/73 Heading F4B In an annular reheating furnace through which metallic workpieces are carried by a conveyer, hot gases rich in partial combustion products are introduced near the discharge end, and additional air is introduced between the charge and discharge ends of the furnace in amounts such the atmosphere is only slightly oxidzing in the intermediate zone and the temperature of the work is maintained below the temperature at which oxidation takes place in any zone. An annular rotary hearth furnace, Fig. 1, has a charging aperture 22 and discharge opening 24 separated by a radial partition 25. A flue outlet 26 at the charge end of zone 1 is connected to a flue stack 32 having an air heating jacket 34 and a burner 77 and air inlet 93 controlled by a temperature sensor 106 to regulate stack conditions. Burners 46, 47 in zones 1 and 2 are supplied with air from a fan 66, and are controlled by temperature sensors 96, 96<SP>1</SP>, 98, 98<SP>1</SP> in conjunction with air inlet devices 84, 86. Burners 48, 49 in zones 3 and 4 and a discharge end burner 50 are supplied with preheated air from the stack jacket 34 and are controlled by thermostats 100, 100<SP>1</SP>, 102, 1021 and 104 so that the fuel/air ratio in zone 4 is between 5 and 6 to 1 and that in zone 3 is between 6 and 8 to 1. Air inlets 86, 84 at the discharge ends of zones 2 and 1 are arranged so that the air flow reaches the inner wall at the same cross-section at which it reaches the roof, so that good mixing and the combustion of the fuel gas is completed in zone 1, while the atmosphere in zone 2 remains neutral. The burners in zones 1 and 2 are used to start up the furnace, the completion of the combustion of the gases from the burners in zones 3 and 4 providing sufficient heat during normal operation. During held periods, excess fuel is burnt off in the stack.
GB744473A 1972-03-17 1973-02-15 Reheating furnace Expired GB1386555A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US23561072 US3819323A (en) 1972-03-17 1972-03-17 Minimum scale reheating furnace and means relating thereto

Publications (1)

Publication Number Publication Date
GB1386555A true GB1386555A (en) 1975-03-05

Family

ID=22886230

Family Applications (1)

Application Number Title Priority Date Filing Date
GB744473A Expired GB1386555A (en) 1972-03-17 1973-02-15 Reheating furnace

Country Status (10)

Country Link
US (1) US3819323A (en)
JP (1) JPS5147404B2 (en)
AU (1) AU5255673A (en)
BR (1) BR7301761D0 (en)
CA (1) CA989610A (en)
DE (1) DE2312176A1 (en)
ES (1) ES412051A1 (en)
FR (1) FR2176746B1 (en)
GB (1) GB1386555A (en)
IT (1) IT981045B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5145056A (en) * 1976-04-07 1992-09-08 Smith Thomas M Air bag tensioning device
SE423141B (en) * 1977-11-30 1982-04-13 Bruun & Soerensen DEVICE IN THE BURNER OF CREMATORIES
DE3231225C2 (en) * 1982-08-21 1991-05-02 Verwaltungsgesellschaft Heinrich Neitz Gmbh & Co Kg, 4930 Detmold, De
US4763880A (en) * 1987-04-03 1988-08-16 Holcroft/Loftus Inc. Rotary hearth multi-chamber, multi-purpose furnace system
US4924785A (en) * 1988-12-05 1990-05-15 Surface Combustion, Inc. Thermal cleaning system
US5297959A (en) * 1990-05-07 1994-03-29 Indugas, Inc. High temperature furnace
US5207972A (en) * 1990-05-07 1993-05-04 Indugas, Inc. High temperature furnace
US5078368A (en) * 1990-05-07 1992-01-07 Indugas, Inc. Gas fired melting furnace
US5240404A (en) * 1992-02-03 1993-08-31 Southern California Gas Company Ultra low NOx industrial burner
WO2009059356A1 (en) * 2007-11-05 2009-05-14 Ansac Pty Ltd Kiln
CN104792153B (en) * 2014-01-20 2017-12-01 宜宾恒旭窑炉科技开发有限公司 A kind of gas collection system of rotary kiln
JP6185435B2 (en) * 2014-07-16 2017-08-23 株式会社神戸製鋼所 Rotary hearth furnace

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1843336A (en) * 1930-03-18 1932-02-02 Kalif Corp Nonoxidizing heating furnace
US2293549A (en) * 1939-05-20 1942-08-18 Sam F Keener Method and apparatus for heating billets
US2296791A (en) * 1941-06-07 1942-09-22 Sam F Keener Rotary furnace
US2334050A (en) * 1942-08-04 1943-11-09 Thomas A Waltz Rotary furnace
US2369529A (en) * 1942-12-22 1945-02-13 Salem Engineering Company Rotary furnace drive
US2417063A (en) * 1943-08-05 1947-03-11 Cold Metal Products Company Rotating annular hearth annealing furnace
US2507274A (en) * 1947-01-23 1950-05-09 Cold Metal Products Company Furnace
US3063878A (en) * 1958-05-07 1962-11-13 Wilson Lee Method of and apparatus for annealing
FR1218675A (en) * 1958-12-30 1960-05-12 Salem Brosius S A Holding Rotary deck ovens
FR1313179A (en) * 1961-11-13 1962-12-28 Stein & Roubaix Improvements in heating metals at high temperature
US3386717A (en) * 1965-04-01 1968-06-04 Kaiser Aluminium Chem Corp Process and apparatus for heat treating aluminum ingots
AT289875B (en) * 1965-07-26 1971-05-10 Biprohut Furnace for direct heating of the material to be heated without any scale
US3544093A (en) * 1968-11-05 1970-12-01 Wyandotte Chemicals Corp Calcining limestone
US3544090A (en) * 1968-11-08 1970-12-01 Martinus F Peeters Kiln for making cement clinker

Also Published As

Publication number Publication date
FR2176746B1 (en) 1976-09-10
ES412051A1 (en) 1976-01-01
AU5255673A (en) 1974-08-29
IT981045B (en) 1974-10-10
BR7301761D0 (en) 1974-06-27
CA989610A (en) 1976-05-25
US3819323A (en) 1974-06-25
JPS4911711A (en) 1974-02-01
CA989610A1 (en)
DE2312176A1 (en) 1973-09-20
FR2176746A1 (en) 1973-11-02
JPS5147404B2 (en) 1976-12-15

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees