CN100543393C - Mixed type iron ore roasting furnace - Google Patents
Mixed type iron ore roasting furnace Download PDFInfo
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- CN100543393C CN100543393C CNB2007100924283A CN200710092428A CN100543393C CN 100543393 C CN100543393 C CN 100543393C CN B2007100924283 A CNB2007100924283 A CN B2007100924283A CN 200710092428 A CN200710092428 A CN 200710092428A CN 100543393 C CN100543393 C CN 100543393C
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- iron ore
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- burner hearth
- heat
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Abstract
The invention discloses a kind of mixed type iron ore roasting furnace, comprise body of heater, heat-resisting furnace lining, burner hearth, charging gear, exhausting fume extractor; It is characterized in that: at the body of heater medium position combustion chamber is set and provides high temperature hot gas, be provided with flame-observing hole on the combustion chamber or in it, lead fire hole, fire door, ash-draining gate, fire grate, airduct to roaster; Lead fire hole and be arranged on the body of heater, the combustion chamber communicates with burner hearth through leading fire hole.Mixed type iron ore roasting furnace of the present invention, roaster adopts solid fuel (anthracite), the fuel availability height, the roaster hear rate is low, on average less than 300,000 kilocalorie/tons, fuel saving; Be particularly suitable for there is not natural gas, the needs in the area of coal gas.Stove door switch is flexible, good seal, can keep the interior negative pressure of stove in the setting value of arts demand.After red (brown) iron ore-siderite mixed type iron ore roasting, the roasted ore iron grade that obtains is higher, greater than 50%; Can satisfy the needs of blast furnace ironmaking.
Description
Technical field
The present invention relates to a kind of smelting equipment, be specifically related to a kind of roaster that is used for roasting red (brown) iron ore-siderite mixed type iron ore.
Background technology
In the iron ore smelting process, all be iron ore to be carried out calcination process usually with roaster.And because lean ore accounts for more than 90% in China's iron ore deposit, rich ore seldom; Especially be distributed in domestic a kind of red (brown) iron ore-siderite mixed type iron ore in Qijiang County, Chongqing City, its mineral composition complexity, the multi mineral symbiosis except that siderite, secondly is a bloodstone, other has a small amount of magnetic iron ore, half martite and limonite.Metal sulfide content is extremely low, and rarely seen pyrite sporadicly distributes.Secondly gangue mineral is pouzacite, chamosite, illite and apatite based on quartz.Other trace quantity mineral comprises calcite, dolomite, plagioclase, biotite, muscovite, zircon, rutile and allochite etc.; The cloth granularity is very carefully few, is difficult to monomer dissociation.Because above characteristics with the roasting technology and the calciner of prior art, all can't carry out calcination process to it, or the calcination process effect are very undesirable, has wasted resource.Being called " calciner of a kind of reducing hematite, limonite, siderite ", number of patent application as name is 200610032484.3 the disclosed technical scheme of Chinese invention patent, and this calciner is loseed by suspended preheater, flash roaster, air valve, pipeline, air exhauster and hot-blast stove etc. to be formed; Suspended preheater is made up of 3-5 grades of cyclone preheaters of cross arrangement up and down, each whirlwind tube and the pipeline that is attached thereto form the one-level cyclone preheater, the outlet of whirlwind tube is connected with the pipeline of next stage through air valve, in the outlet of final stage whirlwind tube air valve and two plate valve is housed.Said apparatus is not suitable for equally and is distributed in domestic above-mentioned red (brown) iron ore-siderite mixed type iron ore in Qijiang County, Chongqing City, its processing cost height, can not effectively control technological parameter, roasting time is long, reduction process slowly, energy consumption and cost height; And it is lower to handle the roasted ore iron grade that obtains, and can not satisfy the needs of blast furnace ironmaking well.
Summary of the invention
The present invention can not satisfy the needs of handling above-mentioned red (brown) iron ore-siderite mixed type iron ore for the calciner that overcomes prior art, above-mentioned red (brown) iron ore one siderite mixed type iron ore is not used for a long time, a kind of roaster of simple in structure, energy consumption is low, roasted ore iron is of high grade mixed type iron ore is provided.
Technical scheme of the present invention: mixed type iron ore roasting furnace comprises body of heater, heat-resisting furnace lining, burner hearth, charging gear, exhausting fume extractor; It is characterized in that: at the body of heater medium position combustion chamber is set and provides high temperature hot gas, be provided with flame-observing hole on the combustion chamber or in it, lead fire hole, fire door, ash-draining gate, fire grate, airduct to roaster; Lead fire hole and be arranged on the body of heater, the combustion chamber communicates with burner hearth through leading fire hole;
Further feature is: on the top, the thermal treatment zone of burner hearth, heat-resisting reinforcement liner plate is set on heat-resisting furnace lining.
Mixed type iron ore roasting furnace of the present invention with respect to prior art, has following characteristics:
1, roaster adopts solid fuel (anthracite), the fuel availability height, and the roaster hear rate is low, on average less than 300,000 kilocalorie/tons, fuel saving; Be particularly suitable for there is not natural gas, the needs in the area of coal gas.
2, the fire door of roaster and firedoor frame hinge water for whole, and material is a heat-resisting cast iron, and stove door switch is flexible, good seal, and fire door and firedoor frame long service life can keep the interior negative pressure of stove in the setting value of arts demand.
3, the slip flame-observing hole can rotate and move, and is close on the furnace wall; Flame-observing hole moves flexibly, seals tight, guarantees that negative pressure is in the setting value of arts demand in the stove.
4, after above-mentioned red (brown) iron ore-siderite mixed type iron ore roasting, the roasted ore iron grade that obtains is higher, greater than 50%; Can satisfy the needs of blast furnace ironmaking.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing:
Fig. 1 is a roaster structure diagram of the present invention (analysing and observe);
Fig. 2 be Fig. 1 along I-I to cutaway view;
The specific embodiment
In Fig. 1,2,1-body of heater, 2-heat-resisting furnace lining, 3-burner hearth, 4-charging gear, 5-exhausting fume extractor, 6-combustion chamber, 7-flame-observing hole, 8-lead fire hole, 9-fire door, 10-ash-draining gate, 11-fire grate, 12-airduct, 13-heat-resisting reinforcement liner plate, 14-abrasion-proof backing block
Mixed type roaster of the present invention comprises body of heater 1, and body of heater 1 mainly is made of supporting steel frame and heat-resisting furnace lining 2, and the centre is a burner hearth 3; Burner hearth 3 tops are preheating zones, and the middle part is the thermal treatment zone, and the bottom is the cooling zone, and the temperature of the thermal treatment zone is the highest; Be provided with charging gear 4 from the roasting iron ore to burner hearth 3 addings that treat on body of heater 1 top, charging gear 4 has feeding devices such as full-automatic, semi-automatic as required, can add to burner hearth 3 by the rhythm of production of technological requirement treat the roasting iron ore; Be provided with exhausting fume extractor 5 on body of heater 1 top, exhausting fume extractor 5 is with burner hearth 3 sealings suitable for reading, comprise air exhauster, cleaner, desulphurization plant, closed conduit etc., its first effect is the flue gas that extracts in the burner hearth 3, the high-temperature gas that combustion chamber 6 is produced enters the thermal treatment zone and the preheating zone of burner hearth 3, and second effect is to make the negative pressure that keeps technological requirement in the burner hearth 3, and roasting is carried out smoothly, the 3rd effect is flue gas to be carried out processing such as desulfurization, dedusting, meets environmental emission standard; Can select for use dry method, wet desulphurization, deduster that waste gas is handled, to reach environmental requirement.Above-mentioned body of heater 1, heat-resisting furnace lining 2, burner hearth 3, charging gear 4, exhausting fume extractor 5 etc. can not be further described at this as prior art.
Roaster of the present invention, be at body of heater 1 medium position combustion chamber 6 to be set to provide high temperature hot gas to roaster, combustion chamber 6 matches with roaster, adopt solid fuel (anthracite), combustion system is a grate firing, the high-temperature flue gas that produces during with burning enters burner hearth 3 by the suction function that 5 suctions of exhausting fume extractor produce, the heating iron ore; Combustion chamber 6 is corresponding with the thermal treatment zone, middle part of body of heater 1.On combustion chamber 6 or in it, be provided with flame-observing hole 7, lead fire hole 8, fire door 9, ash-draining gate 10, fire grate 11, airduct 12 etc., flame-observing hole 7 is arranged on 6 surfaces, combustion chamber, packaged type, is close on the furnace wall, moves flexibly, sealing is tight; Lead fire hole 8 and be arranged on the body of heater 1, combustion chamber 6 communicates with burner hearth 3 through leading fire hole 8, and the high-temperature flue gas that produces during 6 burnings of combustion chamber enters burner hearth 3 through leading fire hole 8; Flame-observing hole 7 can be observed the combustion case of burner hearth 3 in iron ore from flame-observing hole 7 through leading fire hole 8 with to lead fire hole 8 positions corresponding.Be provided with fire door 9, ash-draining gate 10 on combustion chamber 6 or in it, fire door 9 flexibly connects with firedoor frame as the dodge gate that adds fuel etc. in it, and fire door 9 waters formula with the hinge that is connected of firedoor frame for whole, and material is a heat-resisting cast iron, and stove door switch is flexible, good seal; Ash-draining gate 10 is as the usefulness of discharging lime-ash.Fire grate 11 is as solid-fuelled combustion grate, and airduct 12 feeds combustion air in combustion chamber 6, make solid fuel ignition abundant.Combustion chamber 6 has good hear resistance and sealing, and heat-resisting concrete is adopted at 6 tops, combustion chamber, sets up heat-insulation layer, makes whole hear resistance, heat insulating ability good, installation, convenient disassembly.
In burner hearth 3,, generally all be more than 1000 ℃ because temperature is very high, and to produce relative slip or rolling between iron ore and the heat-resisting furnace lining 2, heat-resisting furnace lining 2 produced bigger wash away, percussion, make heat-resisting furnace lining 2 surfaces be easy to come off impaired, influence life-span of body of heater 1; The present invention is provided with heat-resisting reinforcement liner plate 13 on the top, the thermal treatment zone of burner hearth 3 on heat-resisting furnace lining 2, the material of heat-resisting reinforcement liner plate 13 is a heat-resisting cast iron, has good heat-resisting, anti-wear performance, strengthens the protection to heat-resisting furnace lining 2 bodies of wall, prolongs the life-span of body of heater 1.During actual fabrication, heat-resisting reinforcement liner plate 13 firmly is arranged on the heat-resisting furnace lining 2, plays good protective action.To produce relative slip or rolling between the cooling zone in burner hearth 3 bottoms, the roasted ore after the roasting and heat-resisting furnace lining 2, heat-resisting furnace lining 2 is produced bigger wash away, percussion, make heat-resisting furnace lining 2 surfaces be easy to come off impaired, influence life-span of body of heater 1; On the heat-resisting furnace lining 2 of burner hearth 3 bottoms abrasion-proof backing block 14 is set, the material of abrasion-proof backing block 14 is a heat-resisting cast iron, has good heat-resisting, anti-wear performance, strengthens the protection to heat-resisting furnace lining 2 bodies of wall, has strengthened safety coefficient, prolongs the life-span of body of heater 1.
Roasted ore after the roasting is after the cooling of cooling zone, and the conveying device of employing prior art etc. is transported to subsequent processing or warehouse storage with roasted ore.As prior art, do not do detailed description at this.
Claims (2)
1, mixed type iron ore roasting furnace comprises body of heater (1), heat-resisting furnace lining (2), burner hearth (3), charging gear (4), exhausting fume extractor (5); It is characterized in that: body of heater (1) medium position is provided with combustion chamber (6) and provides high temperature hot gas to roaster, upward or in it is provided with flame-observing hole (7) in combustion chamber (6), leads fire hole (8), fire door (9), ash-draining gate (10), fire grate (11) and airduct (12); Described flame-observing hole (7) is arranged on surface, combustion chamber (6), can be close on the furnace wall to move, and flame-observing hole (7) is with to lead fire hole (8) position corresponding, and combustion chamber (6) communicate with burner hearth (3) through leading fire hole (8); On the top, the thermal treatment zone of burner hearth (3), heat-resisting reinforcement liner plate (13) is set on heat-resisting furnace lining (2).
2, mixed type iron ore roasting furnace according to claim 1 is characterized in that: on the heat-resisting furnace lining (2) of burner hearth (3) bottom abrasion-proof backing block (14) is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100924283A CN100543393C (en) | 2007-07-13 | 2007-07-13 | Mixed type iron ore roasting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100924283A CN100543393C (en) | 2007-07-13 | 2007-07-13 | Mixed type iron ore roasting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101089528A CN101089528A (en) | 2007-12-19 |
| CN100543393C true CN100543393C (en) | 2009-09-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100924283A Expired - Fee Related CN100543393C (en) | 2007-07-13 | 2007-07-13 | Mixed type iron ore roasting furnace |
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| CN (1) | CN100543393C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758078B (en) * | 2012-07-24 | 2013-12-18 | 陈小众 | Method for roasting siderite and shaft furnace |
| CN107362902B (en) * | 2017-07-11 | 2019-01-25 | 甘肃酒钢集团宏兴钢铁股份有限公司 | A kind of symbiosis refractory iron ore closed circuit magnetizing roast magnetic separation recovery technique online |
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- 2007-07-13 CN CNB2007100924283A patent/CN100543393C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101089528A (en) | 2007-12-19 |
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Granted publication date: 20090923 Termination date: 20120713 |