CN100567509C - The tunnel furnace of no exterior combustion chamber and combination tunnel furnace thereof are produced direct-reduced iron - Google Patents
The tunnel furnace of no exterior combustion chamber and combination tunnel furnace thereof are produced direct-reduced iron Download PDFInfo
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- CN100567509C CN100567509C CNB2005101353694A CN200510135369A CN100567509C CN 100567509 C CN100567509 C CN 100567509C CN B2005101353694 A CNB2005101353694 A CN B2005101353694A CN 200510135369 A CN200510135369 A CN 200510135369A CN 100567509 C CN100567509 C CN 100567509C
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Abstract
The present invention is to use the tunnel furnace of no exterior combustion chamber and the novel process that combination tunnel furnace pot type method is produced sponge iron thereof.Present method is the coal-based direct reduction method, can produce the sponge iron of different shapes such as spherical, oblate spheroid shape and square shape.Technology comprises: iron ore concentrate prepares through making pellet and cold-consolidated ball nodulizing or briquetting, reductive agent, is mixed, the reaction cartridge jar, go into kiln, kiln discharge, finishing process, specifically shown in Figure of abstract.The present invention cancels exterior combustion chamber and uses interior combustion technology that the width of tunnel furnace is increased to greater than 10 meters, increase individual tunnel kiln volume and production capacity and reached 100,000 tons, combination tunnel furnace production capacity reaches more than 500,000 tons, and tool improves the energy-saving and cost-reducing effect of heat-up rate.Maturing temperature is controlled at 1050-1300 ℃.Advantages such as this technology has that technology is simple, less investment, cost are low, high efficiency, instant effect, industrial scale is big, the range of product multimass is good.
Description
Technical field
The present invention relates to metallurgical direct-reduced iron field.
Background technology
At present, be that the method for the production sponge iron of reductive agent has: kiln process, tunnel furnace and down-draft kiln pot type method, rotary hearth furnace method, KM method and electric heating shaft furnace process etc. with the coal.KM method and electric heating shaft furnace process do not have factory in China, and the rotary hearth furnace method does not drop into industrial production as yet.Tianjin Steel Pipe Corp. introduced kiln process from Britain in 1996 and produces sponge iron.There is more than 20 manufacturer in tunnel furnace and down-draft kiln pot type method China, and throughput is very little.Not seeing as yet both at home and abroad has the tunnel furnace and the combination tunnel furnace thereof that use no exterior combustion chamber to produce the report of sponge iron technology and patent.Tianjin Steel Pipe Corp. 1996 introduces kiln process from Britain and produces the technology of sponge iron and comprise: iron ore concentrate, drying, profit mill, make ball, screening, chain grate machine drying, oxidation preheating, go into kiln, the coal powder injection reduction, spray sweetening agent, advance the cooling cylinder cooling, screening, magnetic separation separation circuit.The shortcoming of this technology is: complex process, equipment is many, investment is big, cost is high, maintenance of equipment is difficult.The production technique of tunnel furnace and down-draft kiln pot type method is: iron ore concentrate, drying, magnetic separation, reductive agent preparation, reaction cartridge jar, go into kiln, unload, cleaning process.Advantage is: littler than kiln process investment, cost is low, the degree of metalization height of sponge iron.Shortcoming is: energy consumption height, equipment capacity are little, investment and still higher, the big industrial-scale production difficulty of cost.
Summary of the invention
Purpose: provide that a kind of throughput is big, the coal-based direct reduction method of less investment, high efficiency.
Technical scheme: with the coal is that reductive agent uses the tunnel furnace of no exterior combustion chamber and combination tunnel furnace pot type method thereof to produce the novel process that direct-reduced iron has another name called sponge iron.This technology provides the internal combustion tunnel furnace of the big no exterior combustion chamber of a kind of throughput to see Fig. 2 Fig. 3 and makes up tunnel furnace and the combination tunnel furnace pot type method production sponge iron thereof that tunnel furnace is seen Fig. 4 and used no exterior combustion chamber, with the above-mentioned shortcoming of solution kiln process, tunnel furnace and down-draft kiln pot type method.Fig. 2 and Fig. 3 are the vertical planning drawing and the A-A sectional views of the monomer tunnel furnace of no exterior combustion chamber, and its effective width A can be greater than 10 meters, 3～6 meters of height, and 100～200 meters of length, the sponge iron annual capacity is greater than 100,000 tons.Fig. 4 is the combination tunnel furnace of no exterior combustion chamber, is to be combined by 4 monomer tunnel furnace.Requiring according to design output can be that two and a plurality of monomer tunnel furnace make up.The combination tunnel furnace sponge iron annual capacity of five monomer tunnel furnace compositions is greater than 500,000 tons.Factory's annual capacity of two five combination tunnel furnace is greater than 1,000,000 tons.The Yao Qiang of monomer or combination tunnel furnace and kiln top can be flat-top or vault, are formed by the refractory castable cast, can also be built into by refractory brick, and common brick tunnel furnace structure is identical with producing.
Beneficial effect: this technology has the following advantages:
1, occupation of land is few, and industrial scale is big: single seat combination kiln annual capacity can reach more than 500,000 tons.
2, investment is little: the investment of this technology is 2/10ths of a kiln process, and is littler than tunnel furnace and down-draft kiln pot type method.
3, the degree of metalization of the sponge iron product of this explained hereafter can reach more than 95%, can produce the sponge iron of different shapes such as spherical, oblate spheroid shape and square shape simultaneously.
4, be raw material with the coal, production cost is low, high efficiency.
Description of drawings
Fig. 1 is a process flow sheet of the present invention
Fig. 2 is a no exterior combustion chamber monomer tunnel furnace vertical planning drawing of the present invention
Fig. 3 is that no exterior combustion chamber monomer tunnel furnace A-A of the present invention digs view
Fig. 4 is a no exterior combustion chamber combination tunnel furnace vertical planning drawing of the present invention
Among the figure: 1, monomer tunnel furnace railway; 2, monomer tunnel kiln top; 3, the monomer tunnel furnace is thrown coal and coal powder injection or fuel gas hole, and every square metre of kiln of high temperature section pushes up 1 hole; 4, monomer tunnel furnace thermal insulation layer; 5, monomer tunnel furnace fire-resistant can; 6, monomer tunnel kiln side wall; 7, monomer tunnel furnace thermal insulation layer; 8, monomer kiln car; 9, monomer tunnel furnace flame retardant coating; 10, monomer tunnel furnace sand seal plate; 11, monomer tunnel furnace sand sealing groove; 12, monomer tunnel furnace wicket; 13, monomer tunnel furnace smoke outlet; 14, monomer tunnel furnace preheating section; 15, the monomer tunnel furnace section of burning till; 16, the monomer tunnel furnace is air-cooled section; 17, monomer tunnel kiln waste heat boiler cooling section; 18, the combination kiln 1 of combination tunnel furnace; 19, the combination kiln 2 of combination tunnel furnace; 20, the combination kiln 3 of combination tunnel furnace; 21, the combination kiln 4 of combination tunnel furnace; 22, the combination kiln internal partition wall of combination tunnel furnace; 23, the combination kiln exterior wall of combination tunnel furnace; 24, the concrete foundation of combination tunnel furnace.
Embodiment
The present invention realizes like this, design-build does not have the tunnel furnace and the combination tunnel furnace thereof of exterior combustion chamber or uses the technical process of the tunnel furnace of producing brick and tile as follows: be raw material with iron ore concentrate, prepare through making ball or briquetting, reductive agent, be mixed, reaction cartridge jar, loading of kiln car go into kiln, kiln discharge, finishing process, as shown in Figure 1.Retort can be used and make square or cylindrical can by high-alumina clay, silicon carbide or high temperature steel.This law is used the large vol WS-ZH internal combustion tunnel kiln of internal combustion and observing and controlling temperature equipment, also can use the tunnel furnace of internal combustion and the production brick and tile that observing and controlling temperature equipment is installed.The reductive agent preparation comprises: hard coal or coke powder, lime or limestone powder, the operation of pulverizing, be mixed.Ratio is mixed: hard coal or coke powder: lime or limestone powder=4～7: 1.Fig. 1 is described further below in conjunction with technical process: according to the requirement of user to product sponge iron iron-holder, and the sponge iron of using with powder metallurgy industry that can use that iron ore concentrate, pellet and the cold-consolidated ball nodulizing production Iron And Steel Industry of 66～72% iron-holder use.Wherein: the pellet technical process uses pellet to be raw material, obtains globular sponge iron; Cooled agglomerated pellet miner process flow uses the cold-consolidated ball nodulizing to be raw material, obtains oblate spheroid shape sponge iron; The iron ore concentrate technical process uses iron ore concentrate to be raw material, obtains sponge iron in lump form.Require: hard coal sulfur-bearing＜0.5%, pulverized anthracite and lime or limestone powder＜3mm.Maturing temperature is controlled at 1050～1300 ℃.Example: iron ore concentrate 69%Fe, reductive agent are 0.6 than iron ore concentrate, and in the retort of packing into, 1250 ℃ of the tunnel kiln roastings of the no exterior combustion chamber of packing into, insulation, kiln discharge, the composition that obtains sponge iron is:
T Fe MFe S P SiO2＜5mm volume density (t/m3)
％：93.96 89.78 0.0072 0.011 4.000 3.0 2.0
Claims (2)
1, a kind of method of not having the tunnel furnace and the combination tunnel furnace production direct-reduced iron thereof of exterior combustion chamber, be characterised in that tunnel furnace and the combination tunnel furnace thereof that uses no exterior combustion chamber and use in fire coal carry out the kiln top and throw or spray fuel, the single seat kiln is wide can to arrive 10 meters, and can be combined into the combination tunnel furnace single device production capacity is increased, the technological process of production is with iron ore concentrate, pellet is a raw material with coal respectively, prepare through reductive agent, mixed ingredients, the reaction cartridge jar, go into kiln, kiln discharge, finishing process, with interior coal blending is main fuel, maturing temperature is 1050-1300 ℃, with hard coal or breeze is reductive agent, with the limestone powder is sweetening agent, and proportioning is: hard coal or breeze are than limestone powder=4 ~ 7 to 1.
2, the method for claim 1, wherein pellet is the cold-consolidated ball nodulizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101353694A CN100567509C (en) | 2005-12-31 | 2005-12-31 | The tunnel furnace of no exterior combustion chamber and combination tunnel furnace thereof are produced direct-reduced iron |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101353694A CN100567509C (en) | 2005-12-31 | 2005-12-31 | The tunnel furnace of no exterior combustion chamber and combination tunnel furnace thereof are produced direct-reduced iron |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1804049A CN1804049A (en) | 2006-07-19 |
| CN100567509C true CN100567509C (en) | 2009-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101353694A Expired - Fee Related CN100567509C (en) | 2005-12-31 | 2005-12-31 | The tunnel furnace of no exterior combustion chamber and combination tunnel furnace thereof are produced direct-reduced iron |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013011521A1 (en) | 2011-07-18 | 2013-01-24 | Tata Steel Limited | A method for direct reduction of oxidized chromite ore fines composite agglomerates in a tunnel kiln using carbonaceous reductant for production of reduced chromite product/ agglomerates applicable in ferrochrome or charge chrome production. |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4680009A (en) * | 1985-08-01 | 1987-07-14 | Metallgesellschaft Aktiengesellschaft | Apparatus for removing oversize from the hot material discharged from a rotary kiln used to produce sponge iron by a direct reduction of iron oxide containing materials |
| CN1306191A (en) * | 2001-01-20 | 2001-08-01 | 四川省蓬安九一实业总公司 | Energy-saving roller-type tunnel kiln |
| CN1390957A (en) * | 2001-06-12 | 2003-01-15 | 中南大学 | Direct reduction process for rotary kiln |
| CN1629322A (en) * | 2003-12-18 | 2005-06-22 | 岳庆丰 | Process for preparing spherical, oblate spherical and diamond shape sponge iron by QF-LY method |
-
2005
- 2005-12-31 CN CNB2005101353694A patent/CN100567509C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4680009A (en) * | 1985-08-01 | 1987-07-14 | Metallgesellschaft Aktiengesellschaft | Apparatus for removing oversize from the hot material discharged from a rotary kiln used to produce sponge iron by a direct reduction of iron oxide containing materials |
| CN1306191A (en) * | 2001-01-20 | 2001-08-01 | 四川省蓬安九一实业总公司 | Energy-saving roller-type tunnel kiln |
| CN1390957A (en) * | 2001-06-12 | 2003-01-15 | 中南大学 | Direct reduction process for rotary kiln |
| CN1629322A (en) * | 2003-12-18 | 2005-06-22 | 岳庆丰 | Process for preparing spherical, oblate spherical and diamond shape sponge iron by QF-LY method |
Non-Patent Citations (4)
| Title |
|---|
| 我国煤基隧道窑直接还原铁生产现状及发展. 梁文阁.特殊钢，第20卷第3期. 1999 |
| 我国煤基隧道窑直接还原铁生产现状及发展. 梁文阁.特殊钢，第20卷第3期. 1999 * |
| 隧道窑生产海绵铁. 吕庆，吕长星，郎建峰，赵利国，徐艳涛，杨保全.河北理工学院学报，第21卷第2期. 1999 |
| 隧道窑生产海绵铁. 吕庆，吕长星，郎建峰，赵利国，徐艳涛，杨保全.河北理工学院学报，第21卷第2期. 1999 * |
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| CN1804049A (en) | 2006-07-19 |
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