CN104457215B - A kind of method that melting iron block prepares high temperature iron liquid - Google Patents

A kind of method that melting iron block prepares high temperature iron liquid Download PDF

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Publication number
CN104457215B
CN104457215B CN201410505372.XA CN201410505372A CN104457215B CN 104457215 B CN104457215 B CN 104457215B CN 201410505372 A CN201410505372 A CN 201410505372A CN 104457215 B CN104457215 B CN 104457215B
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China
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gas
heater
ceramic balls
air inlet
inlet pipe
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CN201410505372.XA
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Chinese (zh)
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CN104457215A (en
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刘建平
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刘建平
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Abstract

The present invention discloses a kind of method that melting iron block prepares high temperature iron liquid, it comprises procedure below: with oxygen rich fuel gas as fuel, furnace charge in gas-fired cupola is directly heated by burner combustion by it with air, the ferrum liquid stream being fused into gap between the Ceramic Balls that lower section is piled up, ferrum liquid is overheated with Ceramic Balls contact process, and the oxidizing component in ferrum liquid is reduced, overheated through Ceramic Balls and reduction after ferrum liquid stream enter forehearth, temperature is 1500 DEG C 1550 DEG C.The present invention is with oxygen rich fuel gas as fuel, burner is taked directly the furnace charge in body of heater to be added heat fusing, ferrum liquid after fusing is overheated by Ceramic Balls, can melting batch efficiently, and it is deposited directly on furnace bottom for overheated and reduced iron liquid Ceramic Balls, need not water cooled grating support, thus bonded hard ferrite magnet can be made to be remained permanently in 1500 DEG C 1550 DEG C, and the potential safety hazard that water cooled grating brings can be eliminated.

Description

A kind of method that melting iron block prepares high temperature iron liquid
Technical field
The present invention relates to melting technique field, concretely relate to a kind of method that melting iron block prepares high temperature iron liquid.
Background technology
Melting iron block generates that ferrum liquid is many carries out in furnace cupola.Tradition furnace cupola use coke as fuel, casting pig in stove Directly contact with coke, and combustion-supporting from air port air blast, make casting pig continuous melting.But owing to using coke environment can be caused evil Bad impact, and have that production efficiency is low, carburetting increases sulfur, the problem such as insufficient of burning, do not met social orientation.Cause This, the most many producers other melting modes of many employings substitute traditional furnace cupola, if gas-fired cupola is with natural gas, liquefaction Gas is fuel, the advantage with cleaning, environmental protection.Existing gas-fired cupola melting iron block is many in the following ways: by natural The burning of air-liquid activating QI produces thermal current, makes Ceramic Balls overheated, and to guarantee that furnace charge post thereon is fully warmed-up, furnace charge is melted Becoming ferrum liquid, ferrum liquid contacts continuation by the gain of heat by Ceramic Balls with Ceramic Balls.Above-mentioned gas-fired cupola selects fuel and fusing due to it The restriction of casting pig mode, the temperature of prepared ferrum liquid can not meet requirement (being below 1400 DEG C), follow-up also needs by electricity The equipment such as stove heat up.Though fuel is improved by some producer, as selected combustion gas and the method for oxygen mix burning, though ferrum can be made Liquid temp is increased to more than 1400 DEG C, but due to the restriction of its frame mode, as conducted heat by Ceramic Balls, and follow-up also need is led to Crossing the water cooled grating (will necessarily lower the temperature) supporting Ceramic Balls, therefore bonded hard ferrite magnet is only capable of meeting requirement within a period of time, during blow-on Between long afterwards bonded hard ferrite magnet can be down to again less than 1400 DEG C.
Summary of the invention
Based on above-mentioned technical problem, the present invention provides a kind of method that melting iron block prepares high temperature iron liquid.
The adopted technical solution is that:
A kind of method that melting iron block prepares high temperature iron liquid, it comprises procedure below:
With oxygen rich fuel gas as fuel, the furnace charge in gas-fired cupola is directly heated by burner combustion by it with air, fusing The ferrum liquid stream become gap between the Ceramic Balls that lower section is piled up, ferrum liquid is overheated with Ceramic Balls contact process, and in ferrum liquid Oxidizing component is reduced, and the ferrum liquid stream after Ceramic Balls crosses thermal reduction enters forehearth, and temperature is 1500 DEG C-1550 DEG C.
Preferably, said method also comprises the process preheating Ceramic Balls, and said process is carried out before heating furnace charge, Particular by additionally several burner combustions, Ceramic Balls is preheated.
Preferably, combustion gas and oxygen mix are made by described oxygen rich fuel gas, and described combustion gas is natural gas and/or liquefied petroleum gas, Volume fraction shared by oxygen in oxygen rich fuel gas is 15%-20%.
Preferably, by oxygen rich fuel gas high velocity jet burning under the pressure of 450kPa-500kPa.
Preferably, described air adds, by heat exchanger and furnace charge, the flue gas being thermally generated before burner and carries out heat exchange entering.
The method have the benefit that:
(1) present invention is with oxygen rich fuel gas as fuel, takes burner directly the furnace charge in body of heater to be added heat fusing, after fusing Ferrum liquid crosses thermal reduction by Ceramic Balls, can melting batch efficiently, and Ceramic Balls is deposited directly on furnace bottom, it is not necessary to water-cooled stove Grid support, thus bonded hard ferrite magnet can be made to be remained permanently in 1500 DEG C-1550 DEG C, and can eliminate the potential safety hazard that water cooled grating brings.
(2) shared by the oxygen during the present invention controls oxygen rich fuel gas, volume fraction is 15%-20%, and makes oxygen rich fuel gas exist High velocity jet burning under the pressure of 450kPa-500kPa, can further improve the melting efficiency of furnace charge, promotes bonded hard ferrite magnet.
(3) present invention uses additionally several burners to preheat the Ceramic Balls of bottom of furnace body, prevents blow-on starting stage ferrum liquid from reaching not To temperature required, it is to avoid occur that ferrum liquid is wasted.
(4) high-temperature flue gas in body of heater is carried out heat exchange with burning required air by heat exchanger by the present invention, makes full use of the energy, Avoid energy dissipation.
Accompanying drawing explanation
The invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings:
Fig. 1 is the structural representation of gas-fired cupola used by the present invention.
In figure: 1-body of heater, 2-Ceramic Balls, 3-furnace charge, 4-first row burner, 5-the first oxygen rich fuel gas air inlet pipe, 6-the first heat Wind air inlet pipe, 7-second row burner, 8-the second oxygen rich fuel gas air inlet pipe, 9-the second hot blast air inlet pipe, 10-heat exchanger, 11-send Airduct, 12-breeze fan, 13-discharge pipe, 14-bellows, 15-feeding port, 16-hopper, 17-cat ladder, 18-induced duct, 19- Reducer, 20-forehearth, 21-ferrum liquid conveyance conduit, 22-casting ladle, 23-support, 24-roller.
Detailed description of the invention
The present invention provides a kind of method that melting iron block prepares high temperature iron liquid, and it comprises procedure below:
With oxygen rich fuel gas as fuel, the furnace charge in gas-fired cupola is directly heated by burner combustion by it with air, molten The ferrum liquid stream of chemical conversion gap between the Ceramic Balls that lower section is piled up, ferrum liquid is overheated with Ceramic Balls contact process, the oxygen in ferrum liquid Chemical conversion point is reduced, and the ferrum liquid stream after Ceramic Balls crosses thermal reduction enters forehearth, and temperature is 1500 DEG C-1550 DEG C.Above-mentioned Ceramic Balls Commercially available obtaining, on the one hand it have high rigidity and may be used to support furnace charge, on the other hand can be by the ferrum liquid mistake after fusing Heat, and have certain reducing power can by ferrum liquid oxidizing component reduce.Above-mentioned oxygen rich fuel gas is by combustion gas and oxygen mix Making, described combustion gas is natural gas and/or liquefied petroleum gas, and volume fraction shared by the oxygen in oxygen rich fuel gas is 15%-20%. By oxygen rich fuel gas high velocity jet burning under the pressure of 450kPa-500kPa.
Further preferred as said method, said process also comprises the process preheating Ceramic Balls, above-mentioned warm Carry out before furnace charge is heated, directly Ceramic Balls is preheated, to prevent particular by additionally several burner combustions Blow-on starting stage ferrum liquid does not reaches temperature required, it is to avoid occur that ferrum liquid is wasted.
Further, described air adds, by heat exchanger and furnace charge, the high-temperature flue gas being thermally generated before burner and carries out heat exchange entering. On the one hand which can reduce the temperature of flue gas, facilitates follow-up dust removal process, on the other hand can be lifted into the air themperature of burner, Make full use of the energy, it is to avoid energy dissipation.
The gas-fired cupola structure being based on said method below illustrates:
As it is shown in figure 1, gas-fired cupola includes vertically arranged body of heater 1, it is provided with several Ceramic Balls 2 in the bottom of body of heater 1, Equipped with furnace charge 3 above Ceramic Balls 2, on body of heater 1, the position of corresponding furnace charge 3 is provided with first row burner 4, first row Burner 4 connects the first oxygen rich fuel gas air inlet pipe 5 and the first hot blast air inlet pipe 6 respectively.Corresponding placing ceramic ball 2 on body of heater 1 Position be provided with second row burner 7, second row burner 7 connects the second oxygen rich fuel gas air inlet pipe 8 respectively and enters with the second hot blast Trachea 9.Be provided with heat exchanger 10 on the top of body of heater 1, heat exchanger 10 in the annular housing structure being nested with outside furnace body wall, Its air inlet connects ajutage 11, is provided with breeze fan 12 on ajutage 11, and its gas outlet connects discharge pipe 13, air-out Pipe 13 is connected with above-mentioned first hot blast air inlet pipe the 6, second hot blast air inlet pipe 9 respectively by bellows 14.At the first oxygen rich fuel gas It is provided with control valve in air inlet pipe the 5, first hot blast air inlet pipe the 6, second oxygen rich fuel gas air inlet pipe 8 and the second hot blast air inlet pipe 9 Door.Be provided with feeding port 15 at the top of body of heater 1, feeding port 15 is positioned at the top of heat exchanger 10, arranges in body of heater 1 side There is hopper 16, between hopper 16 and feeding port 15, be provided with cat ladder 17.It is provided above induced duct 18 at body of heater 1, One end of induced duct 18 connects the exhanst gas outlet of body of heater 1 by reducer 19, and the other end of induced duct 18 connects sack cleaner. Be provided with forehearth 20 in the side of body of heater 1, the bottom of body of heater 1 is connected with forehearth 20 by the ferrum liquid conveyance conduit 21 being obliquely installed Logical.The side of forehearth 20 is provided with casting ladle 22.The lower section of body of heater 1 is provided with support 23, in the furnace bottom bottom surface of body of heater 1 Being provided with roller 24, roller 24 can facilitate furnace bottom to move at the enterprising line position of support, it is simple to repair and maintenance.
The work process of above-mentioned gas-fired cupola approximately as:
Before blow-on, first pile up several Ceramic Balls 2 in the bottom of body of heater 1 and to desired height, in body of heater 1, then load stove Material 3, the furnace charge in hopper 16 is delivered at feeding port 15 through cat ladder 17, and in feeding port 15 loads body of heater 1.Charging Blow-on after completing.The control valve in the second oxygen rich fuel gas air inlet pipe 8 and the second hot blast air inlet pipe 9 is first opened at blow-on initial period Door, preheats to Ceramic Balls 2 by second row burner 7 so that it is to reach temperature required.Then the first oxygen rich fuel gas air inlet pipe is opened 5 and the first control valves in hot blast air inlet pipe 6, are heated to furnace charge by the first burner 4, close the second oxygen rich fuel gas in good time Control valve in air inlet pipe 8 and the second hot blast air inlet pipe 9.Furnace charge in body of heater 1 is fused into ferrum through first row burner 4 heating Liquid, and the gap between Ceramic Balls 2 flow to the bottom of body of heater 1, ferrum liquid is overheated when through Ceramic Balls 2, oxidation therein Composition is reduced, and then ferrum liquid is delivered in forehearth 20 through ferrum liquid conveyance conduit 21, flows into casting ladle 22 afterwards.Load melting mistake The flue gas produced in journey, after heat exchanger 10 heat exchange is lowered the temperature, is delivered in sack cleaner through reducer 19, induced duct 18 successively, Discharge after removing dust.Air from ajutage 11 is delivered to the first hot blast air inlet pipe 6 and the after heat exchanger 10 heat exchange heats up Two hot blast air inlet pipe 9, materials when burning as first row burner 4 and second row burner 7.
The relevant technology contents do not addressed in aforesaid way is taked or uses for reference prior art to realize.
It should be noted that under the teaching of this specification, any equivalents done by those skilled in the art, or Substantially variant, all should be within protection scope of the present invention.

Claims (4)

1. the method that a melting iron block prepares high temperature iron liquid, it is characterised in that use gas-fired cupola, this gas-fired cupola bag Include vertically arranged body of heater, the bottom of body of heater is provided with multiple Ceramic Balls, equipped with furnace charge above Ceramic Balls, on body of heater The position of corresponding furnace charge is provided with first row burner, and first row burner connects the first oxygen rich fuel gas air inlet pipe and the first hot blast respectively Air inlet pipe;On body of heater, the position of corresponding placing ceramic ball is provided with second row burner, and it is rich that second row burner connects second respectively Oxygen gas air inlet pipe and the second hot blast air inlet pipe;The top of body of heater is provided with heat exchanger, and heat exchanger is in being nested with outside furnace body wall Annular housing structure, its air inlet connect ajutage, ajutage is provided with breeze fan, its gas outlet connect discharge pipe, Discharge pipe is connected with the first hot blast air inlet pipe, the second hot blast air inlet pipe respectively by bellows;The first oxygen rich fuel gas air inlet pipe, It is provided with control valve in one hot blast air inlet pipe, the second oxygen rich fuel gas air inlet pipe and the second hot blast air inlet pipe;Top at body of heater Being provided with feeding port, feeding port is positioned at the top of heat exchanger, body of heater side is provided with hopper, sets between hopper and feeding port It is equipped with cat ladder;At the induced duct that is provided above of body of heater, one end of induced duct connects the exhanst gas outlet of body of heater by reducer, draws The other end of airduct connects sack cleaner;The side of body of heater is provided with forehearth, and the bottom of body of heater is by the ferrum liquid being obliquely installed Conveyance conduit connects with forehearth;The side of forehearth is provided with casting ladle;The lower section of body of heater is provided with support, at the furnace bottom of body of heater Bottom surface is provided with roller;The method comprises procedure below:
With oxygen rich fuel gas as fuel, the furnace charge in gas-fired cupola is directly added by first row burner combustion by it with air Heat, the ferrum liquid stream being fused into gap between the Ceramic Balls that lower section is piled up, ferrum liquid is overheated with Ceramic Balls contact process, and Oxidizing component in ferrum liquid is reduced, and the ferrum liquid stream after Ceramic Balls crosses thermal reduction enters forehearth, and temperature is 1500 DEG C-1550 DEG C; The method also comprises the process preheating Ceramic Balls, and said process is carried out before heating furnace charge, particular by Ceramic Balls is preheated by two row's burner combustions.
The method that a kind of melting iron block the most according to claim 1 prepares high temperature iron liquid, it is characterised in that: described oxygen-enriched Combustion gas and oxygen mix are made by combustion gas, and described combustion gas is natural gas and/or liquefied petroleum gas, the oxygen institute in oxygen rich fuel gas Accounting for volume fraction is 15%-20%.
The method that a kind of melting iron block the most according to claim 1 and 2 prepares high temperature iron liquid, it is characterised in that: by richness Oxygen gas is high velocity jet burning under the pressure of 450kPa-500kPa.
The method that a kind of melting iron block the most according to claim 1 prepares high temperature iron liquid, it is characterised in that: described air Before entering burner, add, by heat exchanger and furnace charge, the flue gas being thermally generated carry out heat exchange.
CN201410505372.XA 2014-09-28 2014-09-28 A kind of method that melting iron block prepares high temperature iron liquid CN104457215B (en)

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Publication number Priority date Publication date Assignee Title
CN105841481A (en) * 2016-03-23 2016-08-10 天津派瑞环境工程技术有限公司 Energy saving environment-friendly multifunctional gas stove
CN108253779A (en) * 2018-04-17 2018-07-06 广东北晟益通实业有限公司 Plasma melting furnace cupola and its molten iron method
CN108413767A (en) * 2018-04-17 2018-08-17 广东北晟益通实业有限公司 Novel cokeless furnace cupola and the method for utilizing the device molten iron
CN109945639B (en) * 2019-03-22 2020-04-24 重庆气体压缩机厂有限责任公司 Cupola furnace and repairing process thereof

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CN201811559U (en) * 2010-09-14 2011-04-27 霍恩源 Energy-saving environment-friendly cupola furnace
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CN102679350A (en) * 2012-05-11 2012-09-19 王林海 Gas and oxygen mixed combustion method for cupola furnace and cupola furnace
CN202511612U (en) * 2012-01-20 2012-10-31 薛良 Gas smelting furnace

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Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10145460C1 (en) * 2001-09-14 2003-05-28 Hans Ulrich Feustel Furnace for producing synthesis gas from water and organic material has hearth which tapers towards base and is connected to conical sections, one of which is fitted with injectors for supplementary air and oxygen
CN201417073Y (en) * 2009-06-11 2010-03-03 孙秉功 Natural gas hot air furnace gas purification cupola furnace
CN201811559U (en) * 2010-09-14 2011-04-27 霍恩源 Energy-saving environment-friendly cupola furnace
CN202350493U (en) * 2011-11-26 2012-07-25 山西华尔动力机械有限公司 Cupola
CN202511612U (en) * 2012-01-20 2012-10-31 薛良 Gas smelting furnace
CN102679350A (en) * 2012-05-11 2012-09-19 王林海 Gas and oxygen mixed combustion method for cupola furnace and cupola furnace

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