CN103757168A - Iron making rotary kiln and iron making technology - Google Patents
Iron making rotary kiln and iron making technology Download PDFInfo
- Publication number
- CN103757168A CN103757168A CN201310747865.XA CN201310747865A CN103757168A CN 103757168 A CN103757168 A CN 103757168A CN 201310747865 A CN201310747865 A CN 201310747865A CN 103757168 A CN103757168 A CN 103757168A
- Authority
- CN
- China
- Prior art keywords
- gas
- rotary kiln
- regenerator
- air
- tail
- 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.)
- Granted
Links
Images
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to an iron making rotary kiln and an iron making technology. The iron making technology comprises the following steps of (1) preheating burning gas; (2) heating the rotary kiln; (3) making iron, wherein the iron making rotary kiln comprises a regenerative chamber, a rotary kiln and a tail gas recovery device, and the regenerative chamber comprises a coal gas regenerative chamber and an air regenerative chamber. By rising the temperature in the rotary kiln up to 1700 DEG C, the purpose of making iron by the rotary kiln is realized, the traditional blast furnace iron making technology is changed, pellets are reduced, coal consumption is saved by adopting the sintering technology, iron making process links are reduced, iron making production links are reduced, and then the cost and environment pollution are lowered.
Description
Technical field
The present invention relates to a kind of ironmaking rotary kiln and iron-smelting process thereof.
Background technology
Existing rotary kiln is used coal dust and warm air burning, in kiln, top temperature is 1100 ℃, temperature does not reach ironmaking temperature, existing iron smelting method is used blast furnace ironmaking, but blast furnace ironmaking cost is high, power consumption is large, does not depart from group's ball, sintering process, and blast furnace ironmaking equipment is huge covers an area of, operation is various, and the environmental pressure causing is serious.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of rotary kiln that can smelt iron and iron-smelting process thereof.
The present invention adopts following technical scheme:
A kind of ironmaking rotary kiln comprises regenerator, rotary kiln, device for recovering tail gas;
Described regenerator comprises gas regenerator and air regenerator;
Described gas regenerator is provided with gas entry, gas exit, gas chamber gas inlet and the outlet of gas chamber tail gas, described gas entry is connected with cooled coal gas pipe by cooled coal gas arm, described cooled coal gas pipe is connected with coal-gas producer, described gas exit is connected with bocca by hot gas pipe, described gas chamber gas inlet is connected with offgas duct by tail gas arm, described offgas duct is connected with device for recovering tail gas, and described gas chamber tail gas outlet is connected with tail gas recycle pipe by tail gas recycle arm;
Described air regenerator is provided with gas inlet, air vout, wind box gas inlet and the outlet of wind box tail gas, described gas inlet is connected with cold air pipe by freezing air arm, described cold air pipe is connected with gas blower, described air vout is connected with bocca by warm-air pipe, described wind box gas inlet is connected with offgas duct by tail gas arm, and described wind box tail gas outlet is connected with tail gas recycle pipe by tail gas recycle arm;
Described rotary kiln is tilting on pedestal, and the kiln hood of described rotary kiln is lower than kiln tail, and described kiln tail is provided with raw material powder entrance, and described kiln hood is provided with molten iron outlet;
Described device for recovering tail gas comprises offgas duct, tail gas recycle pipe and is arranged on the tail gas gas blower in offgas duct, described offgas duct one end is fixedly installed on kiln tail, the other end is connected with wind box gas inlet and gas chamber gas inlet by tail gas arm, and described tail gas recycle pipe is connected with the outlet of wind box tail gas and the outlet of gas chamber tail gas by offgas duct;
Described hot gas pipe and warm-air pipe converge to bocca, and described bocca is corresponding with rotary kiln end;
Described gas entry, gas exit, gas chamber gas inlet, the outlet of gas chamber tail gas, gas inlet, air vout, wind box gas inlet and the outlet of wind box tail gas are respectively arranged with air door.
Described gas regenerator and air regenerator arrange more than two being used in conjunction with.
Described rotary kiln end inwall is built zircon corundum brick, and described rotary kiln inwall is built magnesite chrome brick, and described bocca inwall is built zircon corundum brick.
Described offgas duct and tail gas recycle inside pipe wall are built insulating brick.
Described rotary kiln and horizontal plane angle are 3-5 °.
it is above-mentioned that the present invention provides on the other handthe iron-smelting process of ironmaking rotary kiln carries out in the steps below when ironmaking:
(1) burning gas preheating
(1.1) high-temperature tail gas of rotary kiln imports gas regenerator and air regenerator;
(1.2) coal gas of being derived by coal-gas producer, import the gas regenerator that accumulation of heat completes, gas temperature behind gas regenerator gets a promotion, and gas blower is sent to air the air regenerator of accumulation of heat, and the air themperature after air regenerator gets a promotion;
(2) rotary kiln heating
Through the coal gas of high temperature and the spontaneous combustion after bocca converges of the air of high temperature of regenerator, kiln hood is heated;
(3) ironmaking
Raw material powder enters rotary kiln from kiln tail, and under the continuous rotation of tilting rotary kiln, raw material powder moves to the high-temperature zone of rotary kiln, forms molten iron, through stream material mouthful, flows out and obtains molten iron.
In above-mentioned steps (1.1), described rotary kiln exhaust gas temperature is 1100-1200 ℃,
In above-mentioned steps (1.1), the temperature after described regenerator heating is 950-1000 ℃,
In above-mentioned steps (2), the temperature of the coal gas of described high temperature and the air of high temperature is 800-900 ℃,
In above-mentioned steps (2), described kiln hood flame temperature is 1500-1700 ℃;
The composition of the mass percent of above-mentioned raw materials powder:
Powdered iron ore 68-75%,
Coal dust 15-17%,
Wingdale 10-17%;
Furtherly, the high-temperature tail gas that flows out regenerator passes through tail gas recycle pipe again, and tail gas is delivered to raw material powder heating unit, and raw material powder is preheated.
Furtherly, raw material powder is preheated to 200-300 ℃.
Positively effect of the present invention is as follows:
The present invention can be by the temperature increase to 1700 in kiln ℃, can realize and smelt iron object with rotary kiln, change like this technique of traditional blast furnace ironmaking, reduce group's ball, sintering process saving coal consumption, reduce the process procedure of ironmaking, reduce the production link of ironmaking, thereby reduce costs and the pollution to environment.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present invention;
Accompanying drawing 3 is bocca structural representation of the present invention;
Accompanying drawing 4 is two groups of regenerator material flow schematic diagram of the present invention;
Accompanying drawing 5 is two groups of regenerator Two-ports structure schematic diagram of the present invention;
In the accompanying drawings: 1 gas regenerator, 11 gas entries, 12 gas exits, 13 gas chamber gas inlets, 14 gas chamber tail gas outlets, 2 air regenerators, 21 gas inlets, 22 air vouts, 23 wind box gas inlets, 24 wind box tail gas outlets, 3 cooled coal gas pipes, 31 cooled coal gas arms, 32 hot gas pipes, 4 rotary kilns, 41 kiln hoods, 42 kiln tails, 5 boccas, 6 offgas duct, 61 tail gas arms, 62 tail gas recycle arms, 63 tail gas recycle pipes, 7 cold air pipes, 71 freezing air arms, 72 warm-air pipes, 8 tail gas gas blowers, 9 air doors, 10 regenerator.
Embodiment
Embodiment 1: as described in accompanying drawing 2, a kind of ironmaking rotary kiln, comprises regenerator 10, rotary kiln 4, device for recovering tail gas;
Described regenerator comprises gas regenerator 1 and air regenerator 2:
Described gas regenerator 1 is provided with gas entry 11, gas exit 12, gas chamber gas inlet 13 and gas chamber tail gas outlet 14, described gas entry 11 is connected with cooled coal gas pipe 3 by cooled coal gas arm 31, described cooled coal gas pipe 3 is connected with coal-gas producer, described gas exit 12 is connected with bocca 5 by hot gas pipe 32, described gas chamber gas inlet 13 is connected with offgas duct 6 by tail gas arm 61, described offgas duct 6 is connected with device for recovering tail gas, described gas chamber tail gas outlet 14 is connected with tail gas recycle pipe 63 by tail gas recycle arm 62,
Described air regenerator is provided with gas inlet 21, air vout 22, wind box gas inlet 23 and wind box tail gas outlet 24, described gas inlet 21 is connected with cold air pipe 7 by freezing air arm 71, described cold air pipe 7 is connected with gas blower, described air vout 22 is connected with bocca 5 by warm-air pipe 72, described wind box gas inlet 23 is connected with offgas duct 6 by tail gas arm 61, and described wind box tail gas outlet 24 is connected with tail gas recycle pipe 63 by tail gas recycle arm 62.
Described rotary kiln 4 is tilting on pedestal, the inclination angle of rotary kiln 4 be the kiln hood 41 of 4 ° of described rotary kilns 4 lower than kiln tail 42, described kiln tail 42 is provided with raw material powder entrance, described kiln hood 41 is provided with molten iron outlet;
Described device for recovering tail gas comprises offgas duct 6, tail gas recycle pipe 63 and is arranged on the tail gas gas blower 8 in offgas duct 6, described offgas duct 6 one end are fixedly installed on kiln tail 42, the other end is connected with wind box gas inlet 23 and gas chamber gas inlet 13 by tail gas arm 61, and described tail gas recycle pipe 63 is connected with the outlet 24 of wind box tail gas and gas chamber tail gas outlet 14 by offgas duct 62;
Described hot gas pipe 32 and warm-air pipe 72 converge to bocca 5, and described bocca 5 is corresponding with rotary kiln end 41;
Described gas entry 11, gas exit 12, gas chamber gas inlet 13, gas chamber tail gas outlet 14, gas inlet 21, air vout 22, wind box gas inlet 23 and wind box tail gas outlet 24 are respectively arranged with air door 9.
As described in accompanying drawing 1,4, the heat storage in regenerator is built into stereo grid shaped, and heat storage can be refractory brick, the form of piling up of three-dimensional hollow mesh structure is conducive to heat storage accumulation of heat and heat release, take regenerator as two groups as example, the hocket accumulation of heat and allow the heat, cycle be 30min of two groups of regenerator, wherein during one group of accumulation of heat, gas entry 11, gas inlet 21, the air door 9 of gas exit 12 and air vout 22 is closed, gas chamber gas inlet 13, gas chamber tail gas outlet 14, the air door 9 of wind box gas inlet 23 and wind box tail gas outlet 24 is opened, the high-temperature tail gas that now offgas duct 6 is dredged by kiln tail 42 sends into gas regenerator 1 by tail gas gas blower 8 and air regenerator 2 makes the heat storage in regenerator absorb the heat in tail gas, the tail gas that flows out the outlet 14 of gas chamber tail gas and wind box tail gas outlet 24 converges to tail gas recycle pipe 63 by tail gas recycle arm 62, tail gas recycle pipe 63 is sent to tail gas raw material powder primary heater unit again, improve the temperature that raw material powder enters rotary kiln, meanwhile, another group is being carried out heat release, when the regenerator that accumulation of heat completes is carried out heat release, gas chamber gas inlet 13, gas chamber tail gas outlet 14, the air door 9 of wind box gas inlet 23 and wind box tail gas outlet 24 is closed, gas entry 11, gas inlet 21, the air door 9 of gas exit 12 and air vout 22 is opened, the coal gas of the 300-500 now being transported by coal-gas producer ℃ can enter gas regenerator 1 by gas entry 11, the coal gas carrying out after heat exchange enters hot gas pipe 32 via gas exit 12, then be transported to bocca 5, by gas blower, being transported is that air enters after air regenerator heat exchange via gas inlet 21, through air vout 22, enters warm-air pipe 72, is then transported to bocca 5, the coal gas of high temperature and air are in bocca 5 spontaneous combustions, and the flame temperature of kiln hood 41 can reach 1650 ℃, and kiln hood just can keep optimum ironmaking temperature (1480-1520 ℃) like this.
Bocca 5 inwalls are built zircon corundum brick, so very high-temperature heat insulating refractory material is reliability and durability because bocca 5 will bear.
Offgas duct 6 and tail gas recycle pipe 63 inwalls are built insulating brick, need insulation when tail gas is carried, and the one, reduce thermosteresis, the 2nd, reduce the infringement of high temperature to surrounding devices and personnel.
Powdered iron ore and coal dust, raw material powder after the raw materials such as Wingdale mix is entered in kiln body by kiln tail 42, because tilting kiln body constantly rotates, along with the rotation of rotary kiln, material slowly and is uniformly pushed to kiln hood 41, raw material powder is advanced to kiln hood 41 gradually, due to high temperature anoxic in kiln body, the carbon monoxide that carbon in coal dust forms in the hot environment of anoxic, by the 2+ in iron ore, 3+, the iron of 4+ is reduced into iron simple substance, when arriving kiln hood 41 high-temperature area, the fe being reduced is at high temperature fused into liquid state, Wingdale in raw material powder plays desulfurization and catalysis, the effect of slag making, the molten iron of high temperature flows out by flowing material mouthful, because residue light specific gravity can float on above molten iron, finally by slag-drip opening, discharged, through separator, obtain molten iron.
Gas regenerator 1 and air regenerator 2 arrange more than two being used in conjunction with, produce and just can carry out continuously like this, the coal gas of preheating and air can continually be carried in kiln, to produce continual carrying out, with two groups of regenerator, are optimum settings, when more than three groups regenerator coordinates, be applicable to large-scale ironmaking rotary kiln.
As described in accompanying drawing 1,2,4, above-mentioned a kind of iron-smelting process of smelting iron rotary kiln, carries out in the steps below:
(1) burning gas preheating
(1.1) high-temperature tail gas of rotary kiln importing gas regenerator and air regenerator will store in regenerator;
(1.2) coal gas of being derived by coal-gas producer, import the gas regenerator that accumulation of heat completes, gas temperature behind gas regenerator gets a promotion, and by gas blower, air is sent to the air regenerator of accumulation of heat, and the air themperature after air regenerator gets a promotion;
(2) rotary kiln heating
Through the coal gas of high temperature and the spontaneous combustion after bocca converges of the air of high temperature of regenerator, kiln hood is heated;
(3) ironmaking
Raw material powder enters rotary kiln from kiln tail, and under the continuous rotation of tilting rotary kiln, raw material powder moves to the high-temperature zone of rotary kiln, forms molten iron, through stream material mouthful, flows out and obtains molten iron.
In described step (1.1), described rotary kiln exhaust gas temperature is 1150 ℃,
In described step (1.1), the temperature after described regenerator heating is 980 ℃,
In described step (2), the temperature of the coal gas of described high temperature and the air of high temperature is 850 ℃,
In described step (2), described kiln hood is heated by the flame 1650 ℃.
The composition of the mass percent of described raw material powder:
Coal dust 16%,
The high-temperature tail gas that flows out regenerator passes through tail gas recycle pipe again, and tail gas is delivered to raw material powder heating unit, and raw material powder is preheated.
Tail gas is preheated to 200-300 ℃ by raw material powder.
The present invention relates to the relevant device of ironmaking, the associated production line equipment such as coal-gas producer, ore powder processing units, temperature controlling system are identical with existing installation.
Embodiment 2: in the process of ironmaking, the temperature in step 1 and step 2 can also be on the basis of embodiment 1:
In described step (1.1), described rotary kiln exhaust gas temperature is 1200 ℃,
In described step (1.1), the temperature after described regenerator heating is 1000 ℃,
In described step (2), the temperature of the coal gas of described high temperature and the air of high temperature is 900 ℃,
In described step (2), described kiln hood flame temperature is 1700 ℃.
The composition of the mass percent of described raw material powder furtherly:
Powdered iron ore 68%,
Coal dust 17%,
Wingdale 15%.
The inclination angle of rotary kiln 4 is 3 °.
Embodiment 3: in the process of ironmaking, the temperature in step 1 and step 2 can also be on the basis of embodiment 1:
In described step (1.1), described rotary kiln exhaust gas temperature is 1100 ℃,
In described step (1.1), the temperature after described regenerator heating is 950 ℃,
In described step (2), the temperature of the coal gas of described high temperature and the air of high temperature is 800 ℃,
In described step (2), described kiln hood is heated by the flame 1500 ℃.
The composition of the mass percent of described raw material powder:
Powdered iron ore 75%,
Coal dust 15%,
Wingdale 10%.
The inclination angle of rotary kiln 4 is 5 °.
Embodiment 4: as shown in Figure 2, each regenerator has 4 import and export in embodiment 1, corresponding outlet connecting pipe road arranges respectively air door on pipeline, and regenerator opening is too much.On the basis of said structure, as shown in Figure 5, play the exhaust pipe opening of pre-heat effect, can directly be opened in that corresponding (heating air flow is conventionally contrary with coal gas, air draught, adopt adverse currents heating more) coal gas or the duct wall of air turnover regenerator on, offer the position of mouth in being offered the air door middle part of pipeline regenerator opening and this pipeline, the air-flow of each pipeline can be controlled and be independent of each other separately like this, control identically with primary structure, such improvement can reduce the opening of regenerator half.
Claims (10)
1. an ironmaking rotary kiln, is characterized in that: it comprises regenerator (10), rotary kiln (4), device for recovering tail gas;
Described regenerator (10) comprises gas regenerator (1) and air regenerator (2);
Described gas regenerator (1) is provided with gas entry (11), gas exit (12), gas chamber gas inlet (13) and gas chamber tail gas outlet (14), described gas entry (11) is connected with cooled coal gas pipe (3) by cooled coal gas arm (31), described cooled coal gas pipe (3) is connected with coal-gas producer, described gas exit (12) is connected with bocca (5) by hot gas pipe (32), described gas chamber gas inlet (13) is connected with offgas duct (6) by tail gas arm (61), described offgas duct (6) is connected with device for recovering tail gas, described gas chamber tail gas outlet (14) is connected with tail gas recycle pipe (63) by tail gas recycle arm (62),
Described air regenerator is provided with gas inlet (21), air vout (22), wind box gas inlet (23) and wind box tail gas outlet (24), described gas inlet (21) is connected with cold air pipe (7) by freezing air arm (71), described cold air pipe (7) is connected with gas blower, described air vout (22) is connected with bocca (5) by warm-air pipe (72), described wind box gas inlet (23) is connected with offgas duct (6) by tail gas arm (61), described wind box tail gas outlet (24) is connected with tail gas recycle pipe (63) by tail gas recycle arm (62),
Described rotary kiln (4) is tilting on pedestal, and the kiln hood (41) of described rotary kiln (4) is lower than kiln tail (42), and described kiln tail (42) is provided with raw material powder entrance, and described kiln hood (41) is provided with molten iron outlet;
Described device for recovering tail gas comprises offgas duct (6), tail gas recycle pipe (63) and is arranged on the tail gas gas blower (8) in offgas duct (6), described offgas duct (6) one end is fixedly installed on kiln tail (42), the other end is connected with wind box gas inlet (23) and gas chamber gas inlet (13) by tail gas arm (61), and described tail gas recycle pipe (63) is connected with wind box tail gas outlet (24) and gas chamber tail gas outlet (14) by offgas duct (62);
Described hot gas pipe (32) and warm-air pipe (72) converge to bocca (5), and described bocca (5) is corresponding with rotary kiln end (41);
Described gas entry (11), gas exit (12), gas chamber gas inlet (13), the outlet of gas chamber tail gas (14), gas inlet (21), air vout (22), wind box gas inlet (23) and wind box tail gas outlet (24) are respectively arranged with air door (9).
2. a kind of ironmaking rotary kiln according to claim 1, is characterized in that described gas regenerator (1) and air regenerator (2) arrange more than two being used in conjunction with.
3. a kind of ironmaking rotary kiln according to claim 1 and 2, is characterized in that: described rotary kiln end (41) inwall is built zircon corundum brick, and described rotary kiln (42) inwall is built magnesite chrome brick, and described bocca (5) inwall is built zircon corundum brick.
4. a kind of ironmaking rotary kiln according to claim 1 and 2, is characterized in that: described offgas duct (6) and tail gas recycle pipe (63) inwall are built insulating brick.
5. a kind of ironmaking rotary kiln according to claim 1 and 2, is characterized in that: described rotary kiln (4) is 3-5 ° with horizontal plane angle.
6. an iron-smelting process for ironmaking rotary kiln as claimed in claim 1, is characterized in that: when ironmaking, carry out in the steps below:
(1) burning gas preheating
(1.1) high-temperature tail gas of rotary kiln imports gas regenerator and air regenerator;
(1.2) coal gas of being derived by coal-gas producer, import the gas regenerator that accumulation of heat completes, gas temperature behind gas regenerator gets a promotion, and gas blower is sent to air the air regenerator of accumulation of heat, and the air themperature after air regenerator gets a promotion;
(2) rotary kiln heating
Through the coal gas of high temperature and the spontaneous combustion after bocca converges of the air of high temperature of regenerator, kiln hood is heated;
(3) ironmaking
Raw material powder enters rotary kiln from kiln tail, and under the continuous rotation of tilting rotary kiln, raw material powder moves to the high-temperature zone of rotary kiln, forms molten iron, through stream material mouthful, flows out and obtains molten iron.
7. a kind of iron-smelting process of smelting iron rotary kiln according to claim 6, is characterized in that:
In described step (1.1), described rotary kiln exhaust gas temperature is 1100-1200 ℃,
In described step (1.1), the temperature after described regenerator heating is 950-1000 ℃,
In described step (2), the temperature of the coal gas of described high temperature and the air of high temperature is 800-900 ℃,
In described step (2), described kiln hood flame temperature is 1500-1700 ℃.
8. the iron-smelting process of a kind of rotary kiln according to claim 6, is characterized in that:
The composition of the mass percent of described raw material powder:
Powdered iron ore 68-75%,
Coal dust 15-17%,
Wingdale 10-17%.
9. the iron-smelting process of a kind of rotary kiln according to claim 6, is characterized in that: the high-temperature tail gas that flows out regenerator passes through tail gas recycle pipe again, and tail gas is delivered to raw material powder heating unit, and raw material powder is preheated.
10. the iron-smelting process of a kind of rotary kiln according to claim 9, is characterized in that: raw material powder is preheated to 200-300 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747865.XA CN103757168B (en) | 2013-12-31 | 2013-12-31 | A kind of ironmaking rotary kiln and iron-smelting process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310747865.XA CN103757168B (en) | 2013-12-31 | 2013-12-31 | A kind of ironmaking rotary kiln and iron-smelting process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103757168A true CN103757168A (en) | 2014-04-30 |
| CN103757168B CN103757168B (en) | 2015-10-07 |
Family
ID=50524483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310747865.XA Expired - Fee Related CN103757168B (en) | 2013-12-31 | 2013-12-31 | A kind of ironmaking rotary kiln and iron-smelting process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103757168B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106636519A (en) * | 2016-10-12 | 2017-05-10 | 唐竹胜 | Whole-body two-sided flame separating type heating rotary kiln and method for producing direct reduction iron co-production carbon base fertilizer |
| CN107843110A (en) * | 2017-11-29 | 2018-03-27 | 浙江大东吴集团建设新材料有限公司 | A kind of heated air circulation type Expanded Clay Rotary Kilns |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2251707A1 (en) * | 1972-10-21 | 1974-04-25 | Guenter Dipl Ing Heitmann | Direct redn of low-grade iron ore - contg sulphur, phosphorus, arsenic, utilizes reducing stage gases for prior oxidn stage for thermal efficiency |
| US4032121A (en) * | 1974-02-22 | 1977-06-28 | Vereinigte Osterreichische Eisen- Und Stahlwerek-Alpine Montan Aktiengesellschaft | Process for the production of iron from iron ores and apparatus for carrying out said process |
| US4179280A (en) * | 1977-04-30 | 1979-12-18 | Metallgesellschaft Aktiengesellschaft | Direct-reduction process carried out in a rotary kiln |
| CN87104326A (en) * | 1986-06-21 | 1988-01-20 | 金属股份有限公司 | The technology of direct reduction of iron oxide-containing material in rotary kiln |
| CN103058536A (en) * | 2012-11-26 | 2013-04-24 | 石家庄新华能源环保科技股份有限公司 | Heat-accumulation dividing-wall heating rotary kiln device |
| CN203653599U (en) * | 2013-12-31 | 2014-06-18 | 李苏翔 | Rotary kiln for iron smelting |
-
2013
- 2013-12-31 CN CN201310747865.XA patent/CN103757168B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2251707A1 (en) * | 1972-10-21 | 1974-04-25 | Guenter Dipl Ing Heitmann | Direct redn of low-grade iron ore - contg sulphur, phosphorus, arsenic, utilizes reducing stage gases for prior oxidn stage for thermal efficiency |
| US4032121A (en) * | 1974-02-22 | 1977-06-28 | Vereinigte Osterreichische Eisen- Und Stahlwerek-Alpine Montan Aktiengesellschaft | Process for the production of iron from iron ores and apparatus for carrying out said process |
| US4179280A (en) * | 1977-04-30 | 1979-12-18 | Metallgesellschaft Aktiengesellschaft | Direct-reduction process carried out in a rotary kiln |
| CN87104326A (en) * | 1986-06-21 | 1988-01-20 | 金属股份有限公司 | The technology of direct reduction of iron oxide-containing material in rotary kiln |
| CN103058536A (en) * | 2012-11-26 | 2013-04-24 | 石家庄新华能源环保科技股份有限公司 | Heat-accumulation dividing-wall heating rotary kiln device |
| CN203653599U (en) * | 2013-12-31 | 2014-06-18 | 李苏翔 | Rotary kiln for iron smelting |
Non-Patent Citations (1)
| Title |
|---|
| 陈树法: "国外SL-RN回转窑直接还原的发展现状", 《四川冶金》, no. 4, 31 December 1985 (1985-12-31), pages 33 - 39 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106636519A (en) * | 2016-10-12 | 2017-05-10 | 唐竹胜 | Whole-body two-sided flame separating type heating rotary kiln and method for producing direct reduction iron co-production carbon base fertilizer |
| CN106636519B (en) * | 2016-10-12 | 2018-05-08 | 唐竹胜 | The two-sided flame-insulating type heating rotary kiln of entire body and the carbon-based fertile method of production direct reduced iron coproduction |
| CN107843110A (en) * | 2017-11-29 | 2018-03-27 | 浙江大东吴集团建设新材料有限公司 | A kind of heated air circulation type Expanded Clay Rotary Kilns |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103757168B (en) | 2015-10-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103954133B (en) | A kind of middle frequency furnace reinforced device of fluxing continuously | |
| CN206339094U (en) | Heating using microwave produces the product line device of alloy | |
| CN105352314B (en) | A kind of tunnel cave for being used to smelt | |
| CN203653599U (en) | Rotary kiln for iron smelting | |
| CN103776270A (en) | Calcium carbide sensible heat recovery equipment and method for calcium carbide furnace | |
| CN104611498A (en) | External heating type coal-based shaft furnace for producing direct-reduced iron | |
| CN107475483A (en) | A kind of portable steel scrap on-line heating system | |
| CN103757168B (en) | A kind of ironmaking rotary kiln and iron-smelting process thereof | |
| CN209371763U (en) | A kind of tunnel oven for bauxite roasting | |
| CN201081538Y (en) | Tubular oven | |
| CN101875985A (en) | Energy-saving emission-reducing intensive blast furnace technology | |
| CN106546096A (en) | The product line device and production method of microwave heating production alloy | |
| CN207998558U (en) | A kind of extra light calcined magnesia suspended state calcination system | |
| CN104561515B (en) | Continuous way bar plate heating stove and heating means thereof | |
| CN207276500U (en) | A kind of cooled-preheated circulator of light calcined magnesia shaft furnace | |
| CN206014993U (en) | A kind of blast-furnace hot-air furnace apparatus and its cold wind intelligent regulating system | |
| CN203687627U (en) | Continuous fluxing and feeding device for medium-frequency furnace | |
| CN103776271A (en) | Calcium carbide sensible heat recovery equipment for calcium carbide furnace | |
| CN207247873U (en) | Electrical heating shaft furnace material forced heat-exchanging device | |
| CN205228127U (en) | A tunnel cave for smelt | |
| CN201819540U (en) | Fixed temperature-regulating kiln of multi-section high temperature reduction rotary kiln | |
| CN204574771U (en) | A kind of vertical sponge iron sintering equipment | |
| CN204529897U (en) | A kind of coal-based shaft furnace of external-heat producing direct-reduced iron | |
| CN204165377U (en) | A kind of gas-fired cupola | |
| CN206269581U (en) | A kind of high temperature oxygen deprivation multicell heat accumulation founding furnace system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151007 Termination date: 20191231 |