CN107236841A - The heater and heating means of a kind of use converter gas waste-heat steel scrap - Google Patents

The heater and heating means of a kind of use converter gas waste-heat steel scrap Download PDF

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Publication number
CN107236841A
CN107236841A CN201710643359.4A CN201710643359A CN107236841A CN 107236841 A CN107236841 A CN 107236841A CN 201710643359 A CN201710643359 A CN 201710643359A CN 107236841 A CN107236841 A CN 107236841A
Authority
CN
China
Prior art keywords
steel scrap
scrap
converter
heating
valve
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.)
Pending
Application number
CN201710643359.4A
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Chinese (zh)
Inventor
周春林
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.)
Anhui Sheng Bo Metallurgical Environmental Protection Science And Technology Ltd
Original Assignee
Anhui Sheng Bo Metallurgical Environmental Protection Science And Technology Ltd
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
Application filed by Anhui Sheng Bo Metallurgical Environmental Protection Science And Technology Ltd filed Critical Anhui Sheng Bo Metallurgical Environmental Protection Science And Technology Ltd
Priority to CN201710643359.4A priority Critical patent/CN107236841A/en
Publication of CN107236841A publication Critical patent/CN107236841A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/38Removal of waste gases or dust
    • C21C5/40Offtakes or separating apparatus for converter waste gases or dust
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/42Constructional features of converters
    • C21C5/46Details or accessories
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21CPROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28Manufacture of steel in the converter
    • C21C5/42Constructional features of converters
    • C21C5/46Details or accessories
    • C21C5/466Charging device for converters

Abstract

The present invention relates to a kind of heater of use converter gas waste-heat steel scrap and heating means, heater includes exhaust fume collecting hood, evaporated flue, conveying pipeline, scrap heating storehouse, steel scrap storage bin, steel scrap thermal insulation barn, the air inlet in scrap heating storehouse is connected by being provided with the first gas transmission line of the first stop valve with evaporated flue, the gas outlet in scrap heating storehouse is connected with by the second gas transmission line with evaporated flue, the discharging opening of steel scrap storage bin is connected by one section of conveying pipeline for being provided with the first valve with the charging aperture in scrap heating storehouse, the discharging opening in scrap heating storehouse is connected by one section of conveying pipeline for being provided with the second valve with the charging aperture of steel scrap thermal insulation barn, the discharging opening of steel scrap thermal insulation barn is connected by one section of conveying pipeline for being provided with the 3rd valve with the lower end of evaporated flue.The present invention is preheated using high-temperature flue gas burning to steel scrap, come the initial temperature improved, improves the efficiency of converter smelting and the ratio at steel scrap place in the feed in smelting, reduction smelting cost.

Description

The heater and heating means of a kind of use converter gas waste-heat steel scrap
Technical field
The present invention relates to technical field of smelting, and in particular to a kind of heater of use converter gas waste-heat steel scrap And heating means.
Background technology
In metallurgical industry, the source of steelmaking feed mainly has two:Molten iron and steel scrap, steel scrap are the production-goods again reclaimed Source, therefore there is the low advantage of cost relative to molten iron.Steel mill should be multi-purpose useless with molten iron less as far as possible in smelting Steel, not only improves protection resource, is conducive to the sustainable development for saving the energy, reducing environmental pollution, promoting resource again.
At present in converter smelting process, the ratio of steel scrap is general in 10-15%, and with social production, steel scrap amount is not Disconnected accumulation, requires to add a high proportion of steel scrap, favorably in the case that steel scrap has the low advantage of cost compared with molten iron, in convertor steelmaking process In reduction smelting cost, but converter steelmaking process, reduce after molten iron, increase steel scrap ratio because the heat that converter is produced has Limit, it is difficult to the rapid steel scrap melted in converter, causes programming rate in early stage stove slow, and steel scrap is difficult to rapid thawing in converter, Both operating rate is influenceed, the purpose for improving steel scrap ratio is not reached again.
The content of the invention
It is an object of the invention to provide a kind of heater of use converter gas waste-heat steel scrap and heating means, The problem of ratio is low and efficiency is low of steel scrap is smelted to solve to exist in existing converter steeling technology.
To achieve the above object, the present invention provides a kind of heater of use converter gas waste-heat steel scrap, described Heater includes exhaust fume collecting hood, evaporated flue, conveying pipeline, top provided with the scrap heating of charging aperture and bottom provided with discharging opening Storehouse, top are provided with discharging opening provided with the steel scrap storage bin of charging aperture and bottom provided with discharging opening, top provided with charging aperture and bottom Steel scrap thermal insulation barn, steel scrap storage bin, scrap heating storehouse and steel scrap thermal insulation barn be arranged at different height from high to low successively, Air inlet and gas outlet are provided with the side wall in the scrap heating storehouse, the air inlet in the scrap heating storehouse is by being provided with First gas transmission line of one stop valve is connected with the evaporated flue, and the gas outlet in the scrap heating storehouse is with passing through the second gas transmission Pipeline is connected with the evaporated flue, the discharging opening of the steel scrap storage bin by one section of conveying pipeline for being provided with the first valve with The charging aperture connection in the scrap heating storehouse, the conveying that the discharging opening in the scrap heating storehouse is provided with the second valve by one section Pipe is connected with the charging aperture of the steel scrap thermal insulation barn, and the discharging opening of the steel scrap thermal insulation barn is provided with the 3rd valve by one section Conveying pipeline is connected with the lower end of the evaporated flue, and the exhaust fume collecting hood is arranged at the top of converter mouth, the exhaust fume collecting hood it is upper The lower port connection of port and evaporated flue.
It is preferred that, it is provided with second on the evaporated flue between first gas transmission line and second gas transmission line and cuts Disconnected valve.
It is preferred that, first stop valve and second stop valve are high temperature stop valve.
It is preferred that, the heater also include smoke eliminator, the air inlet of the smoke eliminator with it is described The upper port connection of evaporated flue.
It is preferred that, the bottom of steel scrap storage bin, scrap heating storehouse and steel scrap thermal insulation barn is in funnel-form.
Corresponding, another object of the present invention is to provide a kind of heating side of use converter gas waste-heat steel scrap Method, the heating means of the use converter gas waste-heat steel scrap comprise the following steps:
Step S1, steel scrap is added into steel scrap storage bin;
Step S2, checks in scrap heating storehouse whether there is steel scrap;
Step S3, if not having steel scrap in scrap heating storehouse, opens the first valve, makes the steel scrap in steel scrap storage bin The first valve is turned off after into scrap heating storehouse, step S4 is gone to;Otherwise step S2 is gone to;
Step S4, checks whether converter is in the smelting phase;
Step S5, if converter is now in the smelting phase, opens the first stop valve and closes the second stop valve, by converter The high-temperature flue gas of generation is imported in scrap heating storehouse, and steel scrap is heated to preset temperature by the heat carried using high-temperature flue gas, Go to step S6;Otherwise close the first stop valve and open the second stop valve, go to step S4;
Step S6, opens the second valve, the steel scrap after heating is fully entered steel scrap thermal insulation barn;
Step S7, if now converter is in the smelting phase, opening the 3rd valve makes the steel scrap after heating enter after converter The 3rd valve is turned off, if now converter is in the non-smelting phase, the 3rd valve is opened again after converter enters next smelting phase The steel scrap after heating is set to turn off the 3rd valve after entering converter.
It is preferred that, also perform following steps while step S5 is performed:Scrap heating storehouse high temperature flue gas is given up The low-temperature flue gas produced after steel, and converter are in the low-temperature flue gas importing smoke eliminator progress of generation of non-smelting phase only Change.
It is preferred that, the scope of the preset temperature is 600-1200 DEG C.
It is preferred that, the temperature range of the high-temperature flue gas is 1600-1800 DEG C.
The invention has the advantages that:The heater of the use converter gas waste-heat steel scrap of the present invention and heating side Method is by the way that before steel scrap enters converter smelting, the high-temperature flue gas waste heat produced using converter is preheated to steel scrap, to carry The initial temperature of the entrance converter of high steel scrap, accelerates the speed of converter heating, is given up in the efficiency of raising converter smelting and smelting Steel material in the feed where ratio, reduce smelting cost.
Brief description of the drawings
Fig. 1 is structural representation of the present invention using the heater of converter gas waste-heat steel scrap.
Fig. 2 is schematic flow sheet of the present invention using the heating means of converter gas waste-heat steel scrap.
Embodiment
Following examples are used to illustrate the present invention, but are not limited to the scope of the present invention.
Embodiment 1
As shown in figure 1, this using converter gas waste-heat steel scrap heater include exhaust fume collecting hood 1, evaporated flue 2, Conveying pipeline 3, scrap heating storehouse 4, steel scrap storage bin 5 and steel scrap thermal insulation barn 6, steel scrap storage bin 5, scrap heating storehouse 4 and steel scrap Thermal insulation barn 6 is set from high to low successively, and scrap heating storehouse 4, steel scrap storage bin 5 and steel scrap thermal insulation barn 6 are that bottom is in funnel In the warehouse of shape, scrap heating storehouse 4,6 three warehouses of steel scrap storage bin 5 and steel scrap thermal insulation barn, the top of each warehouse is set There are charging aperture, bottom to be provided with discharging opening, the side wall in scrap heating storehouse 4 and be provided with air inlet and gas outlet, scrap heating storehouse 4 Air inlet connected with evaporated flue 2 by being provided with the first gas transmission line 14 of the first stop valve 12, scrap heating storehouse 4 goes out Gas port is connected with by the second gas transmission line 15 with evaporated flue 2, between the first gas transmission line 14 and the second gas transmission line 15 Second stop valve 13 is installed, the first stop valve 12 and the second stop valve 13 are high temperature stop valve, steel scrap storage on evaporated flue 2 The discharging opening of feed bin 5 is connected by one section of conveying pipeline 3 for being provided with the first valve 7 with the charging aperture in scrap heating storehouse 4, and steel scrap adds The discharging opening in hot storehouse 4 is connected by one section of conveying pipeline 3 for being provided with the second valve 8 with the charging aperture of steel scrap thermal insulation barn 6, and steel scrap is protected The discharging opening in warm storehouse 6 is connected by one section of conveying pipeline 3 for being provided with the 3rd valve 9 with the lower end of evaporated flue 2, and exhaust fume collecting hood 1 is in Inverted funnel-form, exhaust fume collecting hood 1 is arranged at the top of the fire door of converter 10, the upper port of exhaust fume collecting hood 1 and the lower port of evaporated flue 2 Connection, exhaust fume collecting hood 1 enters the entrance of evaporated flue 2 as high-temperature flue gas.
Further, in order to prevent the pollution of the environment, the heater in the present embodiment also includes smoke eliminator 11, cigarette The air inlet of air purifying apparatus 11 is connected with the upper port of evaporated flue 2, and smoke eliminator 11 is LT nonaqueous dust cleaners or OG Hydrofilter, smoke eliminator 11 is used to reduce the temperature of high-temperature flue gas and remove the dust in high-temperature flue gas, high temperature The air inlet of flue gas from smoke eliminator 11 enters fashionable, and temperature is carried out at 900 DEG C or so by smoke eliminator 11 to it After cooling and dust separation, the gas temperature of the gas outlet discharge of smoke eliminator 11 is down to 70 DEG C or so, dust concentration drop To 50mg/m3Left and right.
As shown in Fig. 2 the present invention also provides a kind of heating means of use converter gas waste-heat steel scrap, the heating side Method comprises the following steps:
Step S1, steel scrap is added into steel scrap storage bin 5;
During steel scrap is added into steel scrap storage bin 5, a certain amount of steel scrap can be added, can also be filled it up with Steel scrap, particular number is determined according to actual needs.
Step S2, checks in scrap heating storehouse 4 whether there is steel scrap;
Step S3, if not having steel scrap in scrap heating storehouse 4, opens the first valve 7, makes the steel scrap in steel scrap storage bin Material turns off the first valve 7 after entering scrap heating storehouse 4, goes to step S4;Otherwise step S2 is gone to;
When adding steel scrap into scrap heating storehouse 4, if not having steel scrap in scrap heating storehouse 4, the first valve is opened Door 7, steel scrap under gravity can be automatically into scrap heating storehouse 4, when the steel scrap in scrap heating storehouse 4 reaches one When quantitative, the first valve 7 is closed, step S4 is gone to;There is steel scrap in scrap heating storehouse 4, can not now open the first valve 7, Because if there is steel scrap in scrap heating storehouse 4, unheated steel scrap and steel scrap in the first valve 7, steel scrap storage bin 5 are opened Heated steel scrap mixing in heating cabinet 4, can drop the initial temperature that heated steel scrap enters converter 10 It is low, do not reach the purpose that steel scrap ratio is improved in smelting process, therefore, if having steel scrap in scrap heating storehouse 4, go to step S2。
Step S4, checks whether converter 10 is in the smelting phase;
Step S5, if converter 10 is now in the smelting phase, opens the first stop valve 12 and closes the second stop valve 13, will The high-temperature flue gas produced in converter 10 is imported in scrap heating storehouse 4, and steel scrap is heated to by the heat carried using high-temperature flue gas Preset temperature, goes to step S6;Otherwise close the first stop valve 12 and open the second stop valve 13, go to step S4;
Converter 10 is in the smelting phase, and converter 10 can produce substantial amounts of high-temperature flue gas, and the temperature range of high-temperature flue gas is 1600- 1800 DEG C, the steel scrap in scrap heating storehouse 4 is heated to preset temperature, the value of preset temperature by the heat that high-temperature flue gas is carried Scope is 600-1200 DEG C, and in the case where not considering that heat scatters and disappears, preset temperature is equal to steel scrap and enters the initial of converter 10 Temperature, therefore preset temperature is higher, is more conducive to improving the ratio of steel scrap in smelting process, when steel scrap is heated to default temperature After degree, step S6 is gone to;When being in the non-smelting phase due to converter 10,10 generation low-temperature flue gas of converter, these low-temperature flue gas enter Enter in scrap heating storehouse 4, steel scrap can not only be heated, can also absorb the heat of heated rear steel scrap, drop is useless The temperature of steel material, now, closes the first stop valve 12 and opens the second stop valve 13 so that these low-temperature flue gas directly pass through vapour Change the importing smoke eliminator 11 of flue 2 to be purified.Therefore, if converter 10 is now in the non-smelting phase, close first and cut Disconnected valve 12 simultaneously opens the second stop valve 13, goes to step S4;
Step S6, opens the second valve 8, the steel scrap after heating is fully entered steel scrap thermal insulation barn 6;
Step S7, if now converter 10 is in the smelting phase, opening the 3rd valve 9 makes the steel scrap after heating enter converter The 3rd valve 9 is turned off after 10, if now converter 10 is in the non-smelting phase, is opened again after converter 10 enters next smelting phase 3rd valve 9, makes the steel scrap after heating turn off the 3rd valve 9 after entering converter 10.
Further, in order to be able to energy-conserving and environment-protective, following steps are also performed while step S5 is performed:By scrap heating storehouse The low-temperature flue gas produced after 4 high temperature flue gas steel scraps, and converter 10 are in the low-temperature flue gas importing of generation of non-smelting phase Smoke eliminator 11 is purified.
The heater and heating means of the present invention has following characteristics:
1st, steel scrap heat content is high
Steel scrap increases to 600-1200 DEG C by normal temperature, and steel scrap 10 per ton can improve more than heat 405MJ.
2nd, the heating-up time is shortened in stove
Converter 10 is smelted initial stage, the steel scrap of identical ratio, during such as 40% scrap ratio, and in-furnace temperature rises to logical at 1650 DEG C The method crossed the heating steel scrap of the invention of this law and improve smelting scrap ratio can shorten time 40-60 second.
3rd, improve and smelt scrap ratio
After the technology, 60-180 tons of converters 10 can improve scrap ratio to 60% in smelting, effectively reduction converter 10 Smelting cost, reduces energy consumption.
Although above with general explanation and specific embodiment, the present invention is described in detail, at this On the basis of invention, it can be modified or improved, this will be apparent to those skilled in the art.Therefore, These modifications or improvements, belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.

Claims (9)

1. a kind of heater of use converter gas waste-heat steel scrap, the heater include exhaust fume collecting hood, evaporated flue, Conveying pipeline, top are provided with out provided with the scrap heating storehouse of charging aperture and bottom provided with discharging opening, top provided with charging aperture and bottom The steel scrap storage bin of material mouth, top are provided with the steel scrap thermal insulation barn of discharging opening provided with charging aperture and bottom, it is characterised in that steel scrap is stored up Feed bin, scrap heating storehouse and steel scrap thermal insulation barn are set from high to low successively, be provided with the side wall in the scrap heating storehouse into Gas port and gas outlet, the air inlet in the scrap heating storehouse is by being provided with the first gas transmission line and the vapour of the first stop valve Change flue connection, the gas outlet in the scrap heating storehouse is connected with by the second gas transmission line with the evaporated flue, it is described useless The discharging opening of steel storage bin is connected by one section of conveying pipeline for being provided with the first valve with the charging aperture in the scrap heating storehouse, institute The discharging opening for stating scrap heating storehouse is connected by the charging aperture of one section of conveying pipeline and the steel scrap thermal insulation barn for being provided with the second valve Logical, the discharging opening of the steel scrap thermal insulation barn is connected by the lower end of one section of conveying pipeline and the evaporated flue for being provided with the 3rd valve Logical, the exhaust fume collecting hood is arranged at the top of converter mouth, and the upper port of the exhaust fume collecting hood and the lower port of evaporated flue are connected.
2. the heater of use converter gas waste-heat steel scrap according to claim 1, it is characterised in that described The second stop valve is installed on evaporated flue between one gas transmission line and second gas transmission line.
3. the heater of use converter gas waste-heat steel scrap according to claim 2, it is characterised in that described One stop valve and second stop valve are high temperature stop valve.
4. the heater of use converter gas waste-heat steel scrap according to claim 1, it is characterised in that described to add Thermal also includes smoke eliminator, and the air inlet of the smoke eliminator is connected with the upper port of the evaporated flue.
5. the heater of use converter gas waste-heat steel scrap according to claim 1, it is characterised in that steel scrap is stored up The bottom of feed bin, scrap heating storehouse and steel scrap thermal insulation barn is in funnel-form.
6. a kind of heating means of use converter gas waste-heat steel scrap, it is characterised in that the use converter gas waste heat The heating means of heating steel scrap comprise the following steps:
Step S1, steel scrap is added into steel scrap storage bin;
Step S2, checks in scrap heating storehouse whether there is steel scrap;
Step S3, if not having steel scrap in scrap heating storehouse, opens the first valve, enters the steel scrap in steel scrap storage bin The first valve is turned off behind scrap heating storehouse, step S4 is gone to;Otherwise step S2 is gone to;
Step S4, checks whether converter is in the smelting phase;
Step S5, if converter is now in the smelting phase, opens the first stop valve and closes the second stop valve, will be produced in converter High-temperature flue gas import in scrap heating storehouse, steel scrap is heated to preset temperature by the heat carried using high-temperature flue gas, is gone to Step S6;Otherwise close the first stop valve and open the second stop valve, go to step S4;
Step S6, opens the second valve, the steel scrap after heating is fully entered steel scrap thermal insulation barn;
Step S7, if now converter is in the smelting phase, opening the 3rd valve makes the steel scrap after heating be closed again after entering converter The 3rd valve is closed, if now converter is in the non-smelting phase, opening the 3rd valve again after converter enters next smelting phase makes to add Steel scrap after heat turns off the 3rd valve after entering converter.
7. the heating means of use converter gas waste-heat steel scrap according to claim 6, it is characterised in that performing Following steps are also performed while step S5:The low-temperature flue gas that will be produced after the high temperature flue gas steel scrap of scrap heating storehouse, with And converter imports smoke eliminator in the low-temperature flue gas that the non-smelting phase produces and purified.
8. the heating means of use converter gas waste-heat steel scrap according to claim 6, it is characterised in that described pre- If the scope of temperature is 600-1200 DEG C.
9. the heating means of use converter gas waste-heat steel scrap according to claim 6, it is characterised in that the height The temperature range of warm flue gas is 1600-1800 DEG C.
CN201710643359.4A 2017-07-31 2017-07-31 The heater and heating means of a kind of use converter gas waste-heat steel scrap Pending CN107236841A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710643359.4A CN107236841A (en) 2017-07-31 2017-07-31 The heater and heating means of a kind of use converter gas waste-heat steel scrap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710643359.4A CN107236841A (en) 2017-07-31 2017-07-31 The heater and heating means of a kind of use converter gas waste-heat steel scrap

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CN107236841A true CN107236841A (en) 2017-10-10

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109054874A (en) * 2018-05-24 2018-12-21 武汉科技大学 Treatment of!medical waste method based on converter dust UTILIZATION OF VESIDUAL HEAT IN
CN109971916A (en) * 2019-04-01 2019-07-05 东北大学 A kind of device and method using converter waste gas preheating scrap
CN110241286A (en) * 2019-06-12 2019-09-17 河北矿冶建设工程集团有限公司 A kind of pre-heating mean and conveying device of continuous steel scrap converter smelting

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109054874A (en) * 2018-05-24 2018-12-21 武汉科技大学 Treatment of!medical waste method based on converter dust UTILIZATION OF VESIDUAL HEAT IN
CN109054874B (en) * 2018-05-24 2021-03-02 武汉科技大学 Medical waste treatment method based on converter smoke waste heat utilization
CN109971916A (en) * 2019-04-01 2019-07-05 东北大学 A kind of device and method using converter waste gas preheating scrap
CN109971916B (en) * 2019-04-01 2020-04-14 东北大学 Device and method for preheating scrap steel by using converter waste gas
CN110241286A (en) * 2019-06-12 2019-09-17 河北矿冶建设工程集团有限公司 A kind of pre-heating mean and conveying device of continuous steel scrap converter smelting

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