CN206981759U - A kind of Iron concentrate fast reduction in low temperature device - Google Patents
A kind of Iron concentrate fast reduction in low temperature device Download PDFInfo
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- CN206981759U CN206981759U CN201720399883.7U CN201720399883U CN206981759U CN 206981759 U CN206981759 U CN 206981759U CN 201720399883 U CN201720399883 U CN 201720399883U CN 206981759 U CN206981759 U CN 206981759U
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Abstract
A kind of Iron concentrate fast reduction in low temperature device is the utility model is related to, described device includes the pyrolysis oven being sequentially connected, the tank that gathers dust, tar tank and water pot.Device of the present utility model can utilize reducibility gas caused by low order pyrolysis of coal to realize the quick reduction of fine grinding iron ore fine powder, so as to break away from the heavy dependence to natural gas, while greatly improve the direct-reduction efficiency of iron ore.
Description
Technical field
The utility model belongs to chemical field, in particular it relates to a kind of Iron concentrate fast reduction in low temperature device.
Background technology
At present, the blast furnace iron-making process for occupying leading position has to pass through a series of processes early stage such as sintering and coking, past
Toward along with serious pollution.Meanwhile this technique is also not suitable for handling the complicated associated minerals such as vanadium titano-magnetite, produce substantial amounts of
Titanium-containing blast furnace slag causes serious environmental pollution and the wasting of resources.Non-blast furnace ironmaking technique, especially gas base directly reducing technology
Increasingly it is taken seriously.The gas base directly reducing of iron ore is mainly fluid bed and reduction shaft furnace at present, and they are all with high-grade
Iron ore (more than TFe70%) is raw material, and natural gas is obtained into CO+H by catalytic reforming2Content not less than 95% it is artificial also
Primordial Qi, high grade iron ore is reduced directly, final product is metallized pellet, further obtains TFe95% after processing
Sponge iron or hot wafering iron above.
However, the recovery time of current iron ore direct reducing gas-based shaft kiln is longer, reach 4-6 hours.Though fluid bed
Right reduction efficiency is very high, but often using multistage (more than two-stage) fluid bed, required corollary equipment is considerably complicated and operates
It is it is required that high.In addition, existing shaft furnace or fluid bed gas base directly reducing are mainly used as raw material using natural gas.Coal resources in China is rich
The rich and national conditions of natural gas resource critical shortage, which are also iron ore gas base directly reducing technology, obtains the serious barrier further developed
Hinder.
Utility model content
In view of the shortcomings of the prior art, the utility model provides a kind of new Iron concentrate fast reduction in low temperature device, the dress
The quick reduction that reducibility gas caused by low order pyrolysis of coal can be utilized to realize fine grinding iron ore fine powder is put, so as to break away to day
The heavy dependence of right gas, while greatly improve the direct-reduction efficiency of iron ore.
According to the utility model, there is provided a kind of Iron concentrate fast reduction in low temperature device, the device include：
Pyrolysis oven, pyrolysis oven is provided with feed bin, charge pipe, body of heater and semicoke collecting bin, pyrolysis oven from top to down has gas
Body inlet and outlet, gas feed are used to be passed through N2, outlet is connected with pipeline；
Gathered dust tank, and the tank that gathers dust has inlet and outlet, and the import for the tank that gathers dust is connected with the outlet of pyrolysis oven by pipeline；
Tar tank, tar tank have inlet and outlet, and the import of tar tank is connected with the outlet for the tank that gathers dust by pipeline；With
And
Water pot, water pot have inlet and outlet, and the import of water pot is connected with the outlet of tar tank by pipeline, the water pot
Outlet be used for vent gas treatment.
According to one embodiment of the present utility model, the gas feed and outlet of pyrolysis oven are separately positioned on the two of body of heater
Side.
According to one embodiment of the present utility model, pipeline is discharge duct.
According to one embodiment of the present utility model, the composition of tail gas is CO, CH4And H2。
The method that Iron concentrate fast low temperature reduction is carried out by said apparatus, comprises the following steps：
1) Iron concentrate is finely ground into fine powder；
2) the Iron concentrate fine powder obtained in step 1) is sufficiently mixed with low-order coal；
3) in the feed bin for adding the mixture obtained in step 2) at the top of pyrolysis oven and Cang Gai is covered；
4) N is passed through into pyrolysis oven2, control N2Flow and begin to warm up；
5) reach in pyrolysis in-furnace temperature and start to add the mixture in feed bin with uniform speed after 800 DEG C -1000 DEG C
Enter and quickly reduced into pyrolysis oven, obtain the mixture of semicoke and the Iron concentrate that metallizes.
In the method, the particle diameter of fine powder accounts for more than 90% at 10 μm -25 μm in step 1).
In the method, step is further comprised：6) stop heating after the addition was finished, keep N2Flow until pyrolysis
After temperature in stove is down to less than 300 DEG C, N is closed2Room temperature is cooled to, product is taken out in pyrolysis furnace bottom.
In the method, the particle diameter of low-order coal is 0.1mm-1.0mm.
In the method, in step 2) Iron concentrate fine powder and low-order coal according to mass ratio 1:2-1:8 ratio is sufficiently mixed
10min-40min。
In the method, N in step 4)2Flow be 1L/min-10L/min.
In the method, uniform speed is 20g/min-50g/min in step 5).
By using above-mentioned technical proposal, the utility model has the following advantages that compared to prior art：
By device of the present utility model, the utility model is by the pyrolysis of coal and the reduction of Iron concentrate the two steps same
Synchronously completed in one reactor, it is not necessary to which natural gas is source of the gas, it is not required that artificial also Primordial Qi (CO+H2) prepare and pre-process
Corollary equipment, CO, CH in tail gas4And H2Content it is also at a relatively high, be also used as Primordial Qi recycle or for it.
Therefore, production efficiency can both be significantly improved using device of the present utility model, it is rich that and can enough gives full play to coal resources in China
Rich advantage, breaks away from the dependence to natural gas, achieves many things at one stroke.
Brief description of the drawings
Fig. 1 is the structural representation according to the Iron concentrate fast reduction in low temperature device of embodiment of the present utility model.
Description of reference numerals
1 pyrolysis oven, 11 feed bins, 12 charge pipes, 13 bodies of heater, 14 semicoke collecting bins, 2 are gathered dust tank, 3 tar tanks, 4 water pots, 5 rows
Feed channel.
Embodiment
It should be appreciated that shown embodiment of the present utility model is merely illustrative in the exemplary embodiment.Although
Only a small number of embodiments are described in detail in the utility model, but those skilled in the art are readily appreciated that and taken off in not essence
In the case of teaching from the utility model theme, a variety of modifications are feasible.Correspondingly, all such modifications should all be wrapped
Include in the scope of the utility model.In the case where not departing from purport of the present utility model, following exemplary can be implemented
Design, operating condition and parameter of example etc. make others and replace, change, change and delete.
Reference picture 1, the utility model provide a kind of Iron concentrate fast reduction in low temperature device, and the device can utilize low-order coal
Reducibility gas (H caused by the fast pyrogenation of (including the volatile matter such as lignite, jet coal higher coal)2、CH4With CO etc.) will
The Iron concentrate of fine grinding quickly reduces, and the device includes：
Pyrolysis oven 1, pyrolysis oven 1 are provided with 14 groups of feed bin 11, charge pipe 12, body of heater 13 and semicoke collecting bin from top to down
Into pyrolysis oven 1 has gas feed and outlet, and gas feed is used to be passed through N2, outlet is connected with pipeline；
Gather dust tank 2, and the tank 2 that gathers dust has inlet and outlet, and the import for the tank 2 that gathers dust passes through pipeline phase with the outlet of pyrolysis oven 1
Even；
Tar tank 3, tar tank 3 have inlet and outlet, and the import of tar tank 3 and the outlet for the tank 2 that gathers dust pass through pipeline phase
Even；And
Water pot 4, water pot 4 have inlet and outlet, and the import of water pot 4 is connected with the outlet of tar tank 3 by pipeline, described
The outlet of water pot 4 is used for vent gas treatment, such as lights.
In said apparatus, the gas feed and outlet of pyrolysis oven 1 are separately positioned on the both sides of body of heater 13.
In said apparatus, pipeline is discharge duct 5.
In said apparatus, the composition of tail gas is CO, CH4And H2。
The method that Iron concentrate fast reduction in low temperature is carried out using device of the present utility model, include fine grinding and the grain of Iron concentrate
Three preparation of coal, batch mixing and fast pyrogenation-reduction steps.Concrete operation step includes：Iron concentrate is finely ground to particle diameter in 10 μ
M-25 μm of fine powder accounts for more than 90%；By low-order coal that obtained Iron concentrate fine powder and particle diameter are 0.1mm-1.0mm in mass ratio
1:2-1:8 ratio is sufficiently mixed 10min-40min；Feed the mixture into the feed bin 11 at the top of pyrolysis oven 1 and cover Cang Gai,
After the air tight test of whole device is qualified, N is passed through into pyrolysis oven 12, by N2Flow control in 1L/min-10L/min
And begin to warm up；Temperature, which reaches, in pyrolysis oven 1 starts the mixture in feed bin 11 after 800 DEG C -1000 DEG C with 20g/min-
50g/min speed is added in pyrolysis oven 1 and quickly reduced, and obtains the mixture of semicoke and the Iron concentrate that metallizes；Feeding
Stop heating after terminating 5min-10min, keep N2Flow after the temperature in pyrolysis oven 1 is down to below 300 DEG C, close N2
Room temperature is cooled to, product is taken out in the bottom of pyrolysis oven 1.
Referring to specific embodiment, the utility model is illustrated.
Embodiment 1
As shown in figure 1, Iron concentrate is finely ground into particle diameter accounts for 90% in 25 μm of fine powder, the Iron concentrate fine powder and grain that will be obtained
Footpath is the low-order coal in mass ratio 1 of 0.3mm Xu Kuang groups:After 8 ratio is sufficiently mixed 20min, load the top of pyrolysis oven 1
In feed bin 11 and cover Cang Gai.After the air tight test of whole device is qualified, N is passed through into pyrolysis oven 12, by N2Flow control
System is in 5L/min and begins to warm up.Temperature, which reaches, in pyrolysis oven 1 starts the mixture in feed bin 11 after 900 DEG C with 30g/
Min speed is added in pyrolysis oven 1 and simultaneously lights the tail gas after the tank 2 that gathers dust, tar tank 3 and water pot 4 are handled, and is pyrolyzed
Mixture is quickly reduced in stove 1, so as to obtain the mixture of semicoke and the Iron concentrate that metallizes.Stop after charging terminates 5min
Only heat, keep N2Flow after the temperature in pyrolysis oven 1 is down to below 300 DEG C, close N2Room temperature is cooled to, is being pyrolyzed
Take out product in the bottom of stove 1.
Reach 78.22% using the degree of metalization of above-mentioned technical proposal.
Embodiment 2
As shown in figure 1, Iron concentrate is finely ground into particle diameter accounts for 95% in 25 μm of fine powder, the Iron concentrate fine powder and grain that will be obtained
Footpath is the low-order coal in mass ratio 1 of 0.1mm Xu Kuang groups:After 4 ratio is sufficiently mixed 20min, load the top of pyrolysis oven 1
In feed bin 11 and cover Cang Gai.After the air tight test of whole device is qualified, N is passed through into pyrolysis oven 12, by N2Flow control
System is in 5L/min and begins to warm up.Temperature, which reaches, in pyrolysis oven 1 starts the mixture in feed bin 11 after 900 DEG C with 30g/
Min speed is added in pyrolysis oven 1 and simultaneously lights the tail gas after the tank 2 that gathers dust, tar tank 3 and water pot 4 are handled, and is pyrolyzed
Mixture is quickly reduced in stove 1, so as to obtain the mixture of semicoke and the Iron concentrate that metallizes.Stop after charging terminates 5min
Only heat, keep N2Flow after the temperature in pyrolysis oven 1 is down to below 300 DEG C, close N2Room temperature is cooled to, is being pyrolyzed
Take out product in the bottom of stove 1.
Reach 88.75% using the degree of metalization of above-mentioned technical proposal.
Embodiment 3
As shown in figure 1, Iron concentrate is finely ground into particle diameter accounts for 98% in 10 μm of fine powder, the Iron concentrate fine powder and grain that will be obtained
Footpath is the low-order coal in mass ratio 1 of 1.0mm Xu Kuang groups:After 3 ratio is sufficiently mixed 20min, load the top of pyrolysis oven 1
In feed bin 11 and cover Cang Gai.After the air tight test of whole device is qualified, N is passed through into pyrolysis oven 12, by N2Flow control
System is in 2L/min and begins to warm up.Temperature, which reaches, in pyrolysis oven 1 starts the mixture in feed bin 11 after 900 DEG C with 20g/
Min speed is added in pyrolysis oven 1 and simultaneously lights the tail gas after the tank 2 that gathers dust, tar tank 3 and water pot 4 are handled, and is pyrolyzed
Mixture is quickly reduced in stove 1, so as to obtain the mixture of semicoke and the Iron concentrate that metallizes.Stop after charging terminates 5min
Only heat, keep N2Flow after the temperature in pyrolysis oven 1 is down to below 300 DEG C, close N2Room temperature is cooled to, is being pyrolyzed
Take out product in the bottom of stove 1.
Reach 64.57% using the degree of metalization of above-mentioned technical proposal.
Embodiment 4
As shown in figure 1, Iron concentrate is finely ground into particle diameter accounts for 100% in 10 μm of fine powder, by obtained Iron concentrate fine powder with
Particle diameter is the low-order coal in mass ratio 1 of 0.5mm Xu Kuang groups:After 2 ratio is sufficiently mixed 20min, load the top of pyrolysis oven 1
Feed bin 11 in and cover Cang Gai.After the air tight test of whole device is qualified, N is passed through into pyrolysis oven 12, by N2Flow
Control is in 2L/min and begins to warm up.Temperature, which reaches, in pyrolysis oven 1 starts the mixture in feed bin 11 after 900 DEG C with 20g/
Min speed is added in pyrolysis oven 1 and simultaneously lights the tail gas after the tank 2 that gathers dust, tar tank 3 and water pot 4 are handled, and is pyrolyzed
Mixture is quickly reduced in stove 1, so as to obtain the mixture of semicoke and the Iron concentrate that metallizes.Stop after charging terminates 5min
Only heat, keep N2Flow after the temperature in pyrolysis oven 1 is down to below 300 DEG C, close N2Room temperature is cooled to, is being pyrolyzed
Take out product in the bottom of stove 1.
Reach 44.44% using the degree of metalization of above-mentioned technical proposal.
Embodiment 5
As shown in figure 1, Iron concentrate is finely ground into particle diameter accounts for 95% in 20 μm of fine powder, the Iron concentrate fine powder and grain that will be obtained
Footpath is the low-order coal in mass ratio 1 of 0.8mm Xu Kuang groups:After 6 ratio is sufficiently mixed 40min, load the top of pyrolysis oven 1
In feed bin 11 and cover Cang Gai.After the air tight test of whole device is qualified, N is passed through into pyrolysis oven 12, by N2Flow control
System is in 1L/min and begins to warm up.Temperature, which reaches, in pyrolysis oven 1 starts the mixture in feed bin 11 after 1000 DEG C with 50g/
Min speed is added in pyrolysis oven 1 and simultaneously lights the tail gas after the tank 2 that gathers dust, tar tank 3 and water pot 4 are handled, and is pyrolyzed
Mixture is quickly reduced in stove 1, so as to obtain the mixture of semicoke and the Iron concentrate that metallizes.Stop after charging terminates 8min
Only heat, keep N2Flow after the temperature in pyrolysis oven 1 is down to below 300 DEG C, close N2Room temperature is cooled to, is being pyrolyzed
Take out product in the bottom of stove 1.
Reach 79.26% using the degree of metalization of above-mentioned technical proposal.
Embodiment 6
As shown in figure 1, Iron concentrate is finely ground into particle diameter accounts for more than 92% in 15 μm of fine powder, the Iron concentrate fine powder that will be obtained
Low-order coal in mass ratio 1 with particle diameter for 0.6mm Xu Kuang groups:After 5 ratio is sufficiently mixed 35min, loads pyrolysis oven 1 and push up
In the feed bin 11 in portion and cover Cang Gai.After the air tight test of whole device is qualified, N is passed through into pyrolysis oven 12, by N2Stream
Amount control is in 10L/min and begins to warm up.In pyrolysis oven 1 temperature reach start after 800 DEG C by the mixture in feed bin 11 with
45g/min speed is added in pyrolysis oven 1 and simultaneously lights the tail gas after the tank 2 that gathers dust, tar tank 3 and water pot 4 are handled,
Mixture is quickly reduced in pyrolysis oven 1, so as to obtain the mixture of semicoke and the Iron concentrate that metallizes.Terminate in charging
Stop heating after 10min, keep N2Flow after the temperature in pyrolysis oven 1 is down to below 300 DEG C, close N2It is cooled to room
Temperature, product is taken out in the bottom of pyrolysis oven 1.
Reach 81.29% using the degree of metalization of above-mentioned technical proposal.
Can be seen that fast reduction in low temperature device of the present utility model from above-described embodiment 1-6 can utilize low-order coal heat
Reducibility gas caused by solution realizes the quick reduction of fine grinding iron ore fine powder, so as to break away from the heavy dependence to natural gas, together
When greatly improve the direct-reduction efficiency of iron ore.
Preferred embodiment of the present utility model is the foregoing is only, is not used for limiting practical range of the present utility model；
If not departing from spirit and scope of the present utility model, the utility model is modified or equivalent substitution, all should covered
Among the protection domain of the utility model claims.
Claims (3)
1. a kind of Iron concentrate fast reduction in low temperature device, it is characterised in that described device includes：
Pyrolysis oven, the pyrolysis oven are provided with feed bin, charge pipe, body of heater and semicoke collecting bin, the pyrolysis stove from top to down
There are gas feed and outlet, the gas feed is used to be passed through N2, the outlet is connected with pipeline；
Gather dust tank, and the tank that gathers dust has inlet and outlet, and the import of the tank that gathers dust passes through pipe with the outlet of the pyrolysis oven
Road is connected；
Tar tank, the tar tank have inlet and outlet, and the import of the tar tank and the outlet of the tank that gathers dust pass through pipe
Road is connected；And
Water pot, the water pot have inlet and outlet, and the import of the water pot is connected with the outlet of the tar tank by pipeline,
The outlet of the water pot is used for vent gas treatment.
2. device according to claim 1, it is characterised in that the gas feed and outlet of the pyrolysis oven are separately positioned on
The both sides of the body of heater.
3. device according to claim 1, it is characterised in that the pipeline is discharge duct.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720399883.7U CN206981759U (en) | 2017-04-17 | 2017-04-17 | A kind of Iron concentrate fast reduction in low temperature device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720399883.7U CN206981759U (en) | 2017-04-17 | 2017-04-17 | A kind of Iron concentrate fast reduction in low temperature device |
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| CN206981759U true CN206981759U (en) | 2018-02-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903323A (en) * | 2017-04-17 | 2017-06-30 | 江苏省冶金设计院有限公司 | A kind of Iron concentrate fast reduction in low temperature method and apparatus |
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2017
- 2017-04-17 CN CN201720399883.7U patent/CN206981759U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106903323A (en) * | 2017-04-17 | 2017-06-30 | 江苏省冶金设计院有限公司 | A kind of Iron concentrate fast reduction in low temperature method and apparatus |
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Granted publication date: 20180209 Termination date: 20180417 |