CN108950123B - Online mixing and preheating device and method for steelmaking materials - Google Patents
Online mixing and preheating device and method for steelmaking materials Download PDFInfo
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- CN108950123B CN108950123B CN201810914953.7A CN201810914953A CN108950123B CN 108950123 B CN108950123 B CN 108950123B CN 201810914953 A CN201810914953 A CN 201810914953A CN 108950123 B CN108950123 B CN 108950123B
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- preheating
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
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- General Engineering & Computer Science (AREA)
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Abstract
A steelmaking material on-line mixing and preheating device and a method thereof are disclosed, wherein a discharge port at the bottom of a raw material bin of the device is communicated with a feed port at the top of a material mixing and preheating chamber through a weighing mechanism, a discharge valve and a material conveying pipeline in sequence, and a vibrating screen is arranged in the raw material bin; a plurality of material guide inclined plates are distributed in the material mixing preheating chamber along the height direction, and adjacent material guide inclined plates are arranged in a staggered mode; a heating coil is wound outside the mixing preheating chamber; a discharge port at the bottom of the material mixing preheating chamber is provided with a split type material door; the discharging chute is obliquely arranged below the material mixing preheating chamber, and the discharging end of the discharging chute is communicated with the furnace mouth of the steel-making furnace. The method comprises the following steps: starting the vibrating screen to enable the material to fall to the weighing mechanism, and closing the vibrating screen when the weight of the material reaches a set value; opening a discharge valve to enable the materials to enter a material mixing preheating chamber; starting a heating coil to heat the interior of the material mixing preheating chamber, mixing and preheating materials in the falling process, and closing the heating coil after all the materials fall onto a material door; and opening a material door to discharge the mixed and preheated materials into the steel-making furnace through a discharge chute.
Description
Technical Field
The invention belongs to the technical field of steel smelting, and particularly relates to an online mixing and preheating device and method for steelmaking materials.
Background
In the industrial steelmaking production process, besides a large amount of high-temperature molten iron in the furnace is required to be consumed, a part of additional materials such as scrap steel, lime, sinter ore, dolomite and the like are required to be added, the materials are usually added in a room temperature state, and after the room temperature materials are added, a large amount of heat in the furnace is consumed due to heating and melting, so that the steelmaking cycle is increased, and the energy consumption in the smelting process is increased.
To this end, the skilled person has devised various feed preheating devices and methods, the following being illustrative:
①, Chinese patent application with publication No. CN107460274A, discloses a horizontal continuous feed preheating device and a method for intensified preheating thereof, which is characterized in that two dust removal ports are arranged at the front and the back of a horizontal continuous feed preheating duct, and the horizontal continuous feed preheating duct is divided into an intensified preheating zone and a flue gas preheating zone through the dust removal ports, the preheating mode is mainly through electric arc furnace flue gas preheating and burner combustion heat release, and the preheating object is only for scrap steel preheating used by the electric arc furnace, and the effect of mixed preheating on other materials in the steel making process is not mentioned.
②, published as CN104531946A, discloses a scrap steel making device, which preheats scrap steel by using the flue gas of an electric arc furnace sequentially through a vertical main preheating section and a horizontal auxiliary preheating section, and does not mention the function of mixing and preheating other materials in the steel making process.
③, published under the number of CN202973936U, discloses a mechanism for efficiently preheating steelmaking raw materials, which mainly places materials in a material basket, and preheats the materials in the material basket by using the waste heat of tail gas, but the mode cannot ensure the online control of the material consumption, cannot ensure the uniform mixing of the added materials, and cannot easily control the temperature of the preheated materials.
④, published as CN205576201U, discloses an auxiliary feeding device for steel making process, which preheats the material in all directions by arranging a hot air heater and a heating plate, and conveys the material to an electric arc furnace by an arranged screw, but the auxiliary feeding device has a complex structure, low automation degree and high requirement on mechanical equipment.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the online mixing and preheating device and the online mixing and preheating method for the steelmaking materials, which can realize online mixing and preheating of the materials on the basis of the original steelmaking equipment, can simultaneously meet the mixing and preheating of additional materials such as scrap steel, lime, sinter, dolomite and the like, effectively reduce the consumption of heat in a furnace, further shorten the steelmaking smelting period and reduce the energy consumption in the smelting process, and have simple structure and high automation degree.
In order to achieve the purpose, the invention adopts the following technical scheme: an online mixing and preheating device for steelmaking materials comprises a raw material bin, a material conveying pipeline, a material mixing preheating chamber and a material discharging chute; the bottom discharge port of the raw material bin is communicated with the top feed port of the mixing preheating chamber through a material conveying pipeline, a weighing mechanism and a discharge valve are sequentially arranged between the bottom discharge port of the raw material bin and the material conveying pipeline, and a vibrating screen is arranged in the bottom discharge port of the raw material bin; a plurality of material guide inclined plates are arranged in the material mixing preheating chamber, the material guide inclined plates are distributed along the height direction, and adjacent material guide inclined plates are arranged in a staggered mode; an electromagnetic induction heating coil is wound outside the mixing preheating chamber; a discharge port at the bottom of the mixing preheating chamber is provided with a split charging door, the split charging door is connected with a shell of the mixing preheating chamber through a heat-resistant hinge, and the split charging door is opened and closed in a pneumatic, electric or hydraulic mode; the discharging chute is obliquely arranged below the mixing preheating chamber, the receiving end of the discharging chute is positioned under the split charging door, and the discharging end of the discharging chute is communicated with the furnace mouth of the steel-making furnace.
The discharge valve, the vibrating screen, the electromagnetic induction heating coil and the split charging door all adopt an automatic control mode.
The raw material bin sets up two at least, and scrap steel bits, scrap iron bits or scrap steel piece are equipped with in one of them raw material bin, and lime, sinter or dolomite are equipped with in other raw material bins.
The diameter of the waste steel scraps, the waste iron scraps or the waste steel blocks is not more than 100 mm.
The on-line mixing and preheating method for the steelmaking materials adopts the on-line mixing and preheating device for the steelmaking materials, and comprises the following steps:
the method comprises the following steps: starting a vibrating screen in the raw material bin, allowing the material to fall onto a weighing mechanism through the vibrating screen, and closing the vibrating screen until the weighing mechanism detects that the weight of the material reaches a set value;
step two: opening a discharge valve, and discharging the materials with set weight into a material mixing preheating chamber through a material conveying pipeline;
step three: starting an electromagnetic induction heating coil to heat the interior of the material mixing preheating chamber, mixing and preheating falling materials in the process of passing through a plurality of material guide inclined plates until all the falling materials fall on a split charging door in a closed state, and then closing the electromagnetic induction heating coil;
step four: and opening the split charging doors, discharging the materials which are mixed and preheated out of the material mixing preheating chamber, dropping the materials onto the discharging chute, discharging the materials into the steelmaking furnace through the discharging chute, and finishing the feeding.
The invention has the beneficial effects that:
the online mixing and preheating device and the online mixing and preheating method for the steelmaking materials can realize online mixing and preheating of the materials on the basis of the original steelmaking equipment, can simultaneously meet the mixing and preheating of additional materials such as scrap steel, lime, sinter ore, dolomite and the like, effectively reduce the consumption of heat in the furnace, further shorten the steelmaking smelting period and reduce the energy consumption in the smelting process, and have simple structure and high automation degree.
Drawings
FIG. 1 is a schematic structural diagram of an online mixing and preheating device for steelmaking materials according to the present invention;
in the figure, 1 is a raw material bin, 2 is a material conveying pipeline, 3 is a material mixing preheating chamber, 4 is a discharge chute, 5 is a weighing mechanism, 6 is a discharge valve, 7 is a material guide inclined plate, 8 is an electromagnetic induction heating coil, 9 is a split charging door, and 10 is a heat-resistant hinge.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
As shown in fig. 1, an online mixing and preheating device for steelmaking materials comprises a raw material bin 1, a material conveying pipeline 2, a material mixing preheating chamber 3 and a material discharging chute 4; a bottom discharge port of the raw material bin 1 is communicated with a top feed port of the material mixing preheating chamber 3 through a material conveying pipeline 2, a weighing mechanism 5 and a discharge valve 6 are sequentially arranged between the bottom discharge port of the raw material bin 1 and the material conveying pipeline 2, and a vibrating screen is arranged in the bottom discharge port of the raw material bin 1; a plurality of material guide inclined plates 7 are arranged in the material mixing preheating chamber 3, the material guide inclined plates 7 are distributed along the height direction, and the adjacent material guide inclined plates 7 are arranged in a staggered manner; an electromagnetic induction heating coil 8 is wound outside the mixing preheating chamber 3; a discharge port at the bottom of the material mixing preheating chamber 3 is provided with a split charging door 9, the split charging door 9 is connected with the shell of the material mixing preheating chamber 3 through a heat-resistant hinge 10, and the split charging door 9 is opened and closed in a pneumatic, electric or hydraulic mode; the discharging chute 4 is obliquely arranged below the material mixing preheating chamber 3, the material receiving end of the discharging chute 4 is positioned under the split charging door 9, and the discharging end of the discharging chute 4 is communicated with the furnace mouth of the steelmaking furnace.
The discharge valve 6, the vibrating screen, the electromagnetic induction heating coil 8 and the split charging door 9 all adopt an automatic control mode.
The raw material bin 1 is provided with at least two raw material bins, wherein one raw material bin 1 is filled with scrap steel chips, scrap iron chips or scrap steel blocks, and the other raw material bins 1 are filled with auxiliary materials for steelmaking, such as lime, sinter ore or dolomite.
The diameter of the waste steel scraps, the waste iron scraps or the waste steel blocks is not more than 100 mm.
The on-line mixing and preheating method for the steelmaking materials adopts the on-line mixing and preheating device for the steelmaking materials, and comprises the following steps:
the method comprises the following steps: starting a vibrating screen in the raw material bin 1, enabling the material to fall onto the weighing mechanism 5 through the vibrating screen, and closing the vibrating screen until the weighing mechanism 5 detects that the weight of the material reaches a set value;
step two: opening a discharge valve 6, and discharging the materials with set weight into a material mixing preheating chamber 3 through a material conveying pipeline 2;
step three: starting an electromagnetic induction heating coil 8, heating the interior of the material mixing preheating chamber 3, mixing and preheating falling materials in the process of passing through a plurality of material guide inclined plates 7 until all the falling materials fall on a split charging door 9 in a closed state, and then closing the electromagnetic induction heating coil 8;
step four: and opening the split charging door 9, discharging the materials which are mixed and preheated out of the material mixing preheating chamber 3, falling onto the discharging chute 4, then discharging into the steelmaking furnace through the discharging chute 4, and finishing the charging.
The embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications without departing from the scope of the present invention are intended to be included in the scope of the present invention.
Claims (4)
1. The utility model provides a steelmaking is with online preheating device that mixes of material which characterized in that: comprises a raw material bin, a material conveying pipeline, a material mixing preheating chamber and a material discharging chute; the bottom discharge port of the raw material bin is communicated with the top feed port of the mixing preheating chamber through a material conveying pipeline, a weighing mechanism and a discharge valve are sequentially arranged between the bottom discharge port of the raw material bin and the material conveying pipeline, and a vibrating screen is arranged in the bottom discharge port of the raw material bin; a plurality of material guide inclined plates are arranged in the material mixing preheating chamber, the material guide inclined plates are distributed along the height direction, and adjacent material guide inclined plates are arranged in a staggered mode; an electromagnetic induction heating coil is wound outside the mixing preheating chamber; a discharge port at the bottom of the mixing preheating chamber is provided with a split charging door, the split charging door is connected with a shell of the mixing preheating chamber through a heat-resistant hinge, and the split charging door is opened and closed in a pneumatic, electric or hydraulic mode; the discharging chute is obliquely arranged below the material mixing preheating chamber, the material receiving end of the discharging chute is positioned right below the split charging door, and the discharging end of the discharging chute is communicated with a furnace opening of the steel making furnace; the raw material bin sets up two at least, and scrap steel bits, scrap iron bits or scrap steel piece are equipped with in one of them raw material bin, and lime, sinter or dolomite are equipped with in other raw material bins.
2. The on-line mixing and preheating device for steelmaking materials as claimed in claim 1, wherein: the discharge valve, the vibrating screen, the electromagnetic induction heating coil and the split charging door all adopt an automatic control mode.
3. The on-line mixing and preheating device for steelmaking materials as claimed in claim 1, wherein: the diameter of the waste steel scraps, the waste iron scraps or the waste steel blocks is not more than 100 mm.
4. An on-line mixing and preheating method for steelmaking materials, which adopts the on-line mixing and preheating device for steelmaking materials as claimed in claim 1, is characterized by comprising the following steps:
the method comprises the following steps: starting a vibrating screen in the raw material bin, allowing the material to fall onto a weighing mechanism through the vibrating screen, and closing the vibrating screen until the weighing mechanism detects that the weight of the material reaches a set value;
step two: opening a discharge valve, and discharging the materials with set weight into a material mixing preheating chamber through a material conveying pipeline;
step three: starting an electromagnetic induction heating coil to heat the interior of the material mixing preheating chamber, mixing and preheating falling materials in the process of passing through a plurality of material guide inclined plates until all the falling materials fall on a split charging door in a closed state, and then closing the electromagnetic induction heating coil;
step four: and opening the split charging doors, discharging the materials which are mixed and preheated out of the material mixing preheating chamber, dropping the materials onto the discharging chute, discharging the materials into the steelmaking furnace through the discharging chute, and finishing the feeding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810914953.7A CN108950123B (en) | 2018-08-13 | 2018-08-13 | Online mixing and preheating device and method for steelmaking materials |
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| CN201810914953.7A CN108950123B (en) | 2018-08-13 | 2018-08-13 | Online mixing and preheating device and method for steelmaking materials |
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| CN108950123A CN108950123A (en) | 2018-12-07 |
| CN108950123B true CN108950123B (en) | 2020-03-31 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945661A (en) * | 2019-03-25 | 2019-06-28 | 河南全顺振动设备有限公司 | A kind of alloy material pre-heating system and method for steel-making |
| CN111676367A (en) * | 2020-06-11 | 2020-09-18 | 大冶市都鑫摩擦粉体有限公司 | Iron ore powder production preparation is with high-efficient pre-reduction device that preheats |
| CN114353522B (en) * | 2021-12-03 | 2024-01-30 | 湖北文理学院 | Smelting charging system |
| CN114921601B (en) * | 2022-07-22 | 2022-09-30 | 徐州永冠铸业有限公司 | Scrap steel adding device for smelting molten iron |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2316563A1 (en) * | 1975-07-01 | 1977-01-28 | Vibramec Sarl | Melting furnace feed product heating system - has vibratory column with material chutes through which hot gas flows |
| CN201867078U (en) * | 2010-11-22 | 2011-06-15 | 王洪仁 | Preheating furnace for heating materials of arc furnace |
| CN103691354A (en) * | 2013-12-14 | 2014-04-02 | 苏州市新虞仪表成套设备有限公司 | Automatic batching control system |
| CN203893675U (en) * | 2014-05-09 | 2014-10-22 | 宝钢工程技术集团有限公司 | Heating hopper and feeding system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2869853B2 (en) * | 1994-09-12 | 1999-03-10 | 北芝電機株式会社 | Induction heating dezincing equipment |
| ES2662096T3 (en) * | 2014-01-31 | 2018-04-05 | Danieli & C. Officine Meccaniche, S.P.A. | Plant and method for melting metallic materials |
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2018
- 2018-08-13 CN CN201810914953.7A patent/CN108950123B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2316563A1 (en) * | 1975-07-01 | 1977-01-28 | Vibramec Sarl | Melting furnace feed product heating system - has vibratory column with material chutes through which hot gas flows |
| CN201867078U (en) * | 2010-11-22 | 2011-06-15 | 王洪仁 | Preheating furnace for heating materials of arc furnace |
| CN103691354A (en) * | 2013-12-14 | 2014-04-02 | 苏州市新虞仪表成套设备有限公司 | Automatic batching control system |
| CN203893675U (en) * | 2014-05-09 | 2014-10-22 | 宝钢工程技术集团有限公司 | Heating hopper and feeding system |
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