CN106756102A - The system and method for connecing reduction lateritic nickel ore using hydrogen shaft furnace dry method deadweight straightening - Google Patents
The system and method for connecing reduction lateritic nickel ore using hydrogen shaft furnace dry method deadweight straightening Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Abstract
The present invention relates to the system and method that a kind of hydrogen shaft furnace dry method deadweight straightening connects reducing and smelting lateritic nickel ore.The system includes desulfurizer, heating furnace, hydrogen shaft furnace, desulfurizer has also Primordial Qi entrance, desulfurization also Primordial Qi outlet, there are heating furnace desulfurization also Primordial Qi entrance, thermal reduction gas to export, desulfurization also Primordial Qi entrance is connected with the desulfurization also Primordial Qi outlet of desulfurizer, hydrogen shaft furnace has lateritic nickel ore entrance, thermal reduction gas entrance, reduced metallic pellets outlet, gas outlet, and thermal reduction gas entrance is connected with the thermal reduction gas outlet of heating furnace.The present invention is using also Primordial Qi dry reforming technology, the metallic iron and metallic nickel produced using lateritic nickel ore itself reduction are catalyst, the high cost that catalyst is used alone can be saved, and avoid the catalyst deactivation phenomenom caused due to analysis carbon reason when catalyst is recycled for a long time, and the efficiency of lateritic nickel ore is high, CO2Discharge is few.
Description
Technical field
The present invention relates to smelting laterite-nickel ores field, and in particular to one kind is using the whole direct-reduction of deadweight of hydrogen shaft furnace dry method
The system and method for lateritic nickel ore.
Background technology
At present, the 60% of global mine nickel yield derives from nickel sulfide ore, and 40% derives from lateritic nickel ore.In global nickel minerals
In 2.2 hundred million tons of reserves, lateritic nickel ore accounts for 70%.Continuous reduction and smelting laterite-nickel ores technology with nickel sulfide ore resource
Continuous progress, using lateritic nickel ore production nickel proportion be continuously increased.
There are thermal process, wet processing, fiery wet method combined process and other techniques for different lateritic nickel ores.Its
In, thermal process flow is short, efficiency high, treatment scale big, is the leading technology for processing lateritic nickel ore.Wherein, blast furnace process and
Electric furnace smelting is conventional process flow.Blast furnace process production capacity is big, but investment height, production cost high, long flow path, pollution weight.Electricity
More than the 80% of stove smelting energy consumption needs electric energy to provide, high energy consumption.
Based on the shortcoming that above-mentioned pyrometallurgical smelting is present, metallargist develops non-traditional flow process, including rotary kiln
Method and rotary hearth furnace method.Kiln process invests small, process is simple, but production capacity is small, and floor space is big, and automaticity is not high.And
The investment of rotary hearth furnace method is big, and production capacity is small, complex process.Also, two kinds of techniques use coal base reduction, are strong reducing property atmosphere,
The degree of metalization of uncontrollable iron in ore and nickel, causes product quality low, and adaptability to raw material is small.
Hydrogen shaft furnace process reducing atmosphere is controllable, and single device production capacity is big, and high degree of automation is suitable to process red on a large scale
Native nickel minerals, produces high-quality dilval.But, the mineral phase structure of lateritic nickel ore hydrogen very big with iron ore concentrate difference, common
Shaft kiln directly reduced technology is not directly applicable smelting laterite-nickel ores.Therefore, the hydrogen for developing suitable smelting laterite-nickel ores is erected
Stove Direct Reduction Technology, as realizing the key that lateritic nickel ore is efficiently utilized.
Prior art one discloses the method and system that gas base directly reducing iron is produced using Catalytic Conversion of Natural Gas.The skill
Art is heated to 1100 DEG C~1800 DEG C after mixing natural gas and cleaning of off-gas in catalyzed conversion stove, and in the effect of catalyst
Under produce (H2+ CO) >=90% synthesis also Primordial Qi, and control gas outlet temperature for 850 DEG C~1050 DEG C, then pass to erect
Stove produces DRI.But, reducing gas heating and catalyzed conversion are carried out in same reactor, and catalytic conversion reaction
For strong endothermic reaction, it is necessary to temperature very high, and into shaft furnace synthesis also Primordial Qi temperature requirement so high, it is necessary to adjust
Section temperature steps carry out the temperature of regulation and control synthesis also Primordial Qi, cause whole piece process route high energy consumption.And catalyst is expensive,
During being repeatedly used for a long, exist analysis carbon reaction cause catalyst easily to inactivate, these factors result in the technique productions into
This height.
Prior art two is disclosed uses Direct Reduction Iron Produced by Coke Oven Gas abbreviated system.The technology adds coke-stove gas
Heat is blown pure oxygen thereto to 930 DEG C, the temperature of coke-stove gas is brought up into 1050 DEG C, subsequently into shaft furnace.In shaft furnace,
The coke-stove gas of high temperature occurs, from reforming reaction, to produce H under the catalytic action of iron catalyst2And CO, and then reduction-oxidation ball
Group, produces DRI.But, being carried out in shaft furnace when reforming, the catalyst for utilizing is ferrum-based catalyst, catalysis effect
Really poor, methane cracking rate is low, causes (H in reducing gas2+ CO)≤90%, therefore DRI low production efficiency, quality
It is not high.
The content of the invention
It is contemplated that with reference to the characteristics of lateritic nickel ore property, developing a kind of hydrogen shaft furnace for being suitable to lateritic nickel ore direct
Reducing and smelting technology, the technical costs is lower, in hgher efficiency.
The invention discloses the system that a kind of hydrogen shaft furnace dry reforming is reduced directly smelting red clay nickel ore, the system includes
Desulfurizer, heating furnace, hydrogen shaft furnace.
The desulfurizer has also Primordial Qi entrance, desulfurization also Primordial Qi outlet.
There are the heating furnace desulfurization also Primordial Qi entrance, thermal reduction gas to export.Wherein, the desulfurization also Primordial Qi entrance and institute
State the desulfurization also Primordial Qi outlet connection of desulfurizer.
The hydrogen shaft furnace has lateritic nickel ore entrance, thermal reduction gas entrance, reduced metallic pellets outlet, gas outlet.Its
In, the thermal reduction gas entrance is connected with the thermal reduction gas outlet of the heating furnace.
In above-mentioned system, also including wash cooling device, there is air inlet, cooling gas to export for it.The air inlet with
The gas outlet connection of the hydrogen shaft furnace, the cooling gas outlet is connected with the cooling gas entrance of the heating furnace.
In above-mentioned system, also including compressor, it has cooling gas entrance, compression cooling gas outlet.The cooling gas
Entrance is connected with the cooling gas outlet of the wash cooling device, and compression cooling gas outlet is cooled down with the compression of the desulfurizer
Gas entrance is connected.
Preferably, the lateritic nickel ore entrance is arranged on the top of the hydrogen shaft furnace；The thermal reduction gas entrance is set
At the middle part of the hydrogen shaft furnace；The gas outlet is arranged on the top of the hydrogen shaft furnace；The reduced metallic pellets outlet
It is arranged on the bottom of the hydrogen shaft furnace.
The invention also discloses a kind of method that utilization said system is reduced directly smelting red clay nickel ore, including following step
Suddenly：
The also Primordial Qi is then fed into being heated in the heating furnace via the desulfurizer desulfurization, obtains thermal reduction gas.
During the thermal reduction gas are sent into the hydrogen shaft furnace, and to adding iron and nickel in the hydrogen shaft furnace as catalysis
Agent, the thermal reduction gas are issued in the catalytic action of the iron and nickel is conigenous reforming reaction, obtains synthesis also Primordial Qi.
Contacted with the synthesis also Primordial Qi and reduced to lateritic nickel ore, the lateritic nickel ore is added in the hydrogen shaft furnace
Reaction, obtains reduced metallic pellets, and the iron contained in the reduced metallic pellets and nickel are used as the catalysis from reforming reaction
Agent.
In the method for above-mentioned direct-reduction smelting red clay nickel ore, also including step：The synthesis also Primordial Qi is reduced
Discharged through by the gas outlet at the top of the hydrogen shaft furnace after reaction, and to send into that carry out in the wash cooling device washing cold
But after, obtain cooling down gas.During the cooling pneumatic transmission entered into the heating furnace, and, the cooling pneumatic transmission is entered into the desulfurizer
In.
In the method for above-mentioned direct-reduction smelting red clay nickel ore, the temperature of the thermal reduction gas is 850~1050 DEG C.
In the method for above-mentioned direct-reduction smelting red clay nickel ore, in the lateritic nickel ore mass content of nickel be 0.5~
3%, the mass content of iron is 10~50%.
In the method for above-mentioned direct-reduction smelting red clay nickel ore, H in the synthesis also Primordial Qi2With the volume ratio of CO >=
90%；And H2It is 1.0~2.0 with the ratio of CO.
In the method for above-mentioned direct-reduction smelting red clay nickel ore, the time of the reduction reaction is 2~4h.
Using Primordial Qi dry reforming technology is gone back, the metallic iron and metallic nickel produced using lateritic nickel ore itself reduction are the present invention
Catalyst, not only saves the high cost that catalyst is used alone, and avoid when catalyst is recycled for a long time due to analysis carbon
The catalyst deactivation phenomenom that reason is caused.It is of the invention to be greatly improved from reforming efficiency, the H in synthesis also Primordial Qi2With CO contents
Increase, improve the efficiency of lateritic nickel ore.Also, the also Primordial Qi dry reforming technology that the present invention is used, can make full use of and be
Unite the CO for producing2, reduce CO2Discharge, realizes clean manufacturing.
Brief description of the drawings
Fig. 1 is the system schematic that the present invention connects reduction lateritic nickel ore using hydrogen shaft furnace dry method deadweight straightening.
Fig. 2 is the method for connecing reduction lateritic nickel ore using the system dry method deadweight straightening shown in Fig. 1 in the embodiment of the present invention
Schematic flow sheet.
Reference figure in accompanying drawing is as follows：
1st, desulfurizer；2nd, heating furnace；3rd, hydrogen shaft furnace；4th, wash cooling device；5th, compressor.
Specific embodiment
Below in conjunction with drawings and Examples, specific embodiment of the invention is described in more details, so as to energy
Enough more fully understand the solution of the present invention and the advantage of its various aspects.However, specific embodiments described below and reality
It is only descriptive purpose to apply example, rather than limitation of the present invention.
As shown in figure 1, the system schematic of reduction lateritic nickel ore is connect using hydrogen shaft furnace dry method deadweight straightening for the present invention.
The system includes desulfurizer 1, heating furnace 2, hydrogen shaft furnace 3, wash cooling device 4, compressor 5.Wherein, the connection of each device
Relation is as follows：
Desulfurizer 1 carries out desulfurization process for pair also Primordial Qi, and there is also Primordial Qi entrance, compression to cool down gas entrance, take off for it
Sulphur also Primordial Qi outlet.
Heating furnace 2 is used to heat above-mentioned desulfurization also Primordial Qi, its have desulfurization also Primordial Qi entrance, cooling gas entrance,
Thermal reduction gas are exported.Wherein, the desulfurization also Primordial Qi entrance is connected with the desulfurization also Primordial Qi outlet of desulfurizer 1.
The direct-reduction that hydrogen shaft furnace 3 is used for lateritic nickel ore is smelted, and top is provided with hopper, for receiving lateritic nickel ore
Raw material, bottom is provided with hopper, for discharging solid product.There is hydrogen shaft furnace 3 lateritic nickel ore entrance, thermal reduction gas to enter
Mouth, reduced metallic pellets outlet, gas outlet.Wherein, thermal reduction gas entrance is arranged on the middle part of hydrogen shaft furnace 3, with heating furnace 2
Thermal reduction gas outlet connection.Also, lateritic nickel ore entrance is located at the top of hydrogen shaft furnace 3, is communicated with hopper.Reducing metal ball
Group's outlet is arranged on the bottom of hydrogen shaft furnace 3, is communicated with hopper.Gas outlet is arranged on the top of hydrogen shaft furnace 3.
Wash cooling device 4 is used to receiving after the generation reduction reaction discharged by hydrogen shaft furnace 3 and synthesizes also Primordial Qi, to it
Wash cooling treatment is carried out, there is air inlet, cooling gas to export for it.Wherein, air inlet is connected with the gas outlet of hydrogen shaft furnace 3,
Cooling gas outlet is connected with the cooling gas entrance of heating furnace 2.
Compressor 5 is used to receive the cooling gas discharged by wash cooling device 4, and it has cooling gas entrance, compression cooling
Gas is exported.Wherein, cooling gas entrance is connected with the cooling gas outlet of wash cooling device 4, and compression cooling gas is exported and desulfurization dress
Put 1 compression cooling gas entrance connection.
As shown in Fig. 2 the method stream of reduction lateritic nickel ore is connect using the system dry method deadweight straightening shown in Fig. 1 for the present invention
Journey schematic diagram.Comprise the following steps：
(1) also Primordial Qi deadweight is whole
Also Primordial Qi is delivered to after carrying out desulfurization process in desulfurizer 1, obtains desulfurization also Primordial Qi.In the present invention, reduction
Gas is low temperature distillation coal gas etc. in natural gas, coke-stove gas, coal, wherein containing a certain amount of CH4.Then by desulfurization also Primordial Qi
850~1050 DEG C are heated in feeding heating furnace 2, the thermal reduction gas for obtaining are via the thermal reduction gas entrance in the middle part of hydrogen shaft furnace 3
Into in hydrogen shaft furnace 3.Laterite nickel ore oxidized pellet is continuous by lateritic nickel ore entrance via the hopper at the top of hydrogen shaft furnace 3
In feeding hydrogen shaft furnace 3.In the laterite nickel ore oxidized pellet that the present invention is selected, the mass content of nickel is 0.5~3%, the matter of iron
Amount content is 10~50%.Under conditions of being catalyst in iron and nickel, thermal reduction gas occur to crack and conduct oneself with dignity in hydrogen shaft furnace 3
Whole reaction, reaction equation is：CH4+CO2=2CO+2H2.Meanwhile, a small amount of vapor is also contained in thermal reduction gas, it may occur that
Side reaction：CH4+H2O=CO+3H2。
By above-mentioned cracking and from reforming reaction, synthesis also Primordial Qi can be obtained.Wherein, H2Synthesis reduction is accounted for the volume of CO
More than 90% (including 90%) of gas cumulative volume.In the embodiment of the present invention, go back Primordial Qi and control heating furnace 2 by from different
Heating-up temperature so that H in the synthesis of preparation also Primordial Qi2It is 1.0~2.0 with the ratio of CO.
(2) it is reduced directly smelting red clay nickel ore
The synthesis that above-mentioned steps are obtained also Primordial Qi is moved upwards in hydrogen shaft furnace 3.On the top of hydrogen shaft furnace 3, synthesis is also
Primordial Qi is heated to laterite nickel ore oxidized pellet.Laterite nickel ore oxidized pellet is moved from top to bottom in hydrogen shaft furnace 3, in hydrogen
The top of gas shaft furnace 3 contacts with the synthesis for running up also Primordial Qi, is synthesized also Primordial Qi direct-reduction.In the present invention, control reduction
The time of smelting is 2~4h.
In the present invention, the content of CO is higher in synthesis also Primordial Qi.Also, the reduction reaction of CO is exothermic reaction, so that can
For what thermal reduction gas porch occurred heat is provided from reforming reaction.Also, it is anti-to there is direct-reduction in laterite nickel ore oxidized pellet
Should, reduced metallic pellets are obtained, wherein containing metallic iron and metallic nickel, can be used as thermal reduction gas from the catalyst of reforming reaction.
In the bottom of hydrogen shaft furnace 3, there is carburization reaction in reduced metallic pellets, and after being cooled down, by the bottom of hydrogen shaft furnace 3
The hopper in portion is exported via reduced metallic pellets and discharged.
(3) utilization after synthesis also Primordial Qi reduction
In above-mentioned steps, after synthesis also Primordial Qi completes reduction reaction in hydrogen shaft furnace 3, via the top of hydrogen shaft furnace 3
Discharge gas outlet.Then, it is sent in wash cooling device 4, after scrubbed cooling and dedusting, the cooling gas for obtaining is divided into
Two parts.Part cooling pneumatic transmission to enter obtain after compression in compressor 5 compression cooling gas, be then fed into desulfurizer 1 with
Also Primordial Qi mixing, is circulated utilization.Another part cooling pneumatic transmission enters in heating furnace 2, is used as fuel combustion.
In the present invention, the reformer in traditional handicraft is replaced using heating furnace 2.It is to add catalyst in traditional handicraft
To in reformer.Wherein, catalyst is individually purchase, and price is costly.Also, due to going back depositing for Primordial Qi in reformer
, easily make catalyst that analysis carbon occurs and react, finally lose catalysis activity.The present invention uses heating furnace 2, functions only as the work of heating
By lateritic nickel ore raw material in hydrogen shaft furnace 3 there is reduction reaction generation iron with, catalyst and nickel is obtained.In course of reaction
In, even if catalyst occurs analysis carbon reaction, also the bottom of hydrogen shaft furnace 3 can be run to as final product, and discharge out of the furnace.
Also, in the present invention, laterite nickel ore oxidized pellet is added in a continuous fashion in hydrogen shaft furnace 3.That is, in course of reaction
Catalyst be the raw catelyst for continuously generating, be not in used catalyst.The reduction gold that reaction finally gives
Category pelletizing, can not only be used for catalyst and is alternatively arranged as product of the invention.
Embodiment 1
From natural gas as also Primordial Qi.Natural gas is sent into heating furnace after desulfurization, is heated to 1050 DEG C.Then pass through
Thermal reduction gas entrance in the middle part of hydrogen shaft furnace enters in hydrogen shaft furnace.Laterite nickel ore oxidized pellet is through the material feeding at the top of hydrogen shaft furnace
Bucket feeding.Wherein, in laterite nickel ore oxidized pellet, the mass content of nickel is 0.8%, and the mass content of iron is 35%.Thermal reduction
After it enters in hydrogen shaft furnace, under conditions of being catalyst in iron and nickel, by cracking and from reforming reaction, synthesis reduction is produced
Gas, wherein H2It is 93% with the volume fraction of CO.And H2/ CO is 1.6.Synthesis also Primordial Qi is moved upwards, is added on hydrogen shaft furnace top
The laterite nickel ore oxidized pellet that heat, reduction are moved from top to bottom, the recovery time is 4h.In hydrogen shaft furnace bottom, reducing metal ball
There is carburization reaction in group, and after cooling, discharged by the hopper of bottom.From hydrogen after synthesis also Primordial Qi completion reduction reaction
Gas outlet discharge at the top of shaft furnace, scrubbed cooling, dust removal process.Then qi leel into two parts will be cooled down：It is a part of compressed
Mix with also Primordial Qi after machine compression, be circulated utilization；Another part is delivered in heating furnace as fuel.
Embodiment 2
From natural gas as also Primordial Qi.Natural gas enters in heating furnace after desulfurization, is heated to 1050 DEG C.Then pass through
Thermal reduction gas entrance in the middle part of hydrogen shaft furnace enters in hydrogen shaft furnace.Laterite nickel ore oxidized pellet is through the material feeding at the top of hydrogen shaft furnace
Bucket feeding.Wherein, in laterite nickel ore oxidized pellet, the mass content of nickel is 1.7%, and the mass content of iron is 20%.Thermal reduction
After gas enters in hydrogen shaft furnace, under conditions of being catalyst in iron and nickel, by cracking and from reforming reaction, synthesis reduction is produced
Gas, wherein H2It is 95% with the volume fraction of CO.And H2/ CO is 1.6.Synthesis also Primordial Qi is moved upwards, is added on hydrogen shaft furnace top
The laterite nickel ore oxidized pellet that heat, reduction are moved from top to bottom, the recovery time is 2h.In hydrogen shaft furnace bottom, reducing metal ball
There is carburization reaction in group, and after cooling, discharged by the hopper of bottom.From hydrogen after synthesis also Primordial Qi completion reduction reaction
Gas outlet discharge at the top of shaft furnace, scrubbed cooling, dust removal process.Then qi leel into two parts will be cooled down：It is a part of compressed
Mix with also Primordial Qi after machine compression, be circulated utilization；Another part is delivered in heating furnace as fuel.
Embodiment 3
From coke-stove gas as also Primordial Qi.Coke-stove gas enters in heating furnace after desulfurization, is heated to 950 DEG C.Then
Entered in hydrogen shaft furnace by the thermal reduction gas entrance in the middle part of hydrogen shaft furnace.Laterite nickel ore oxidized pellet through hydrogen shaft furnace at the top of
Hopper is sent into.Wherein, in laterite nickel ore oxidized pellet, the mass content of nickel is 1.7%, and the mass content of iron is 20%.Heat
After also Primordial Qi enters in hydrogen shaft furnace, under conditions of being catalyst in iron and nickel, by cracking and from reforming reaction, synthesis is produced
Also Primordial Qi, wherein H2It is 93% with the volume fraction of CO.And H2/ CO is 1.8.Synthesis also Primordial Qi is moved upwards, on hydrogen shaft furnace
The laterite nickel ore oxidized pellet that portion's heating, reduction are moved from top to bottom, the recovery time is 3h.In shaft furnace bottom, reducing metal ball
There is carburization reaction in group, and after cooling, discharged by the hopper of shaft furnace bottom.Synthesis also Primordial Qi complete reduction reaction after from
Gas outlet discharge at the top of hydrogen shaft furnace, scrubbed cooling, dust removal process.Then qi leel into two parts will be cooled down：Part warp
Mix with also Primordial Qi after compressor compresses, be circulated utilization；Another part is delivered in heating furnace as fuel.
Embodiment 4
From coke-stove gas as also Primordial Qi.Coke-stove gas enters in heating furnace after desulfurization, is heated to 1000 DEG C.Then
Entered in hydrogen shaft furnace by the thermal reduction gas entrance in the middle part of hydrogen shaft furnace.Laterite nickel ore oxidized pellet through hydrogen shaft furnace at the top of
Hopper is sent into.Wherein, in laterite nickel ore oxidized pellet, the mass content of nickel is 3.0%, and the mass content of iron is 10%.Heat
After also Primordial Qi enters in hydrogen shaft furnace, under conditions of being catalyst in iron and nickel, by cracking and from reforming reaction, synthesis is produced
Also Primordial Qi, wherein H2It is 95% with the volume fraction of CO.And H2/ CO is 1.0.Synthesis also Primordial Qi is moved upwards, on hydrogen shaft furnace
The laterite nickel ore oxidized pellet that portion's heating, reduction are moved from top to bottom, the recovery time is 2h.In shaft furnace bottom, reducing metal ball
There is carburization reaction in group, and after cooling, discharged by the hopper of shaft furnace bottom.Synthesis also Primordial Qi complete reduction reaction after from
Gas outlet discharge at the top of hydrogen shaft furnace, scrubbed cooling, dust removal process.Then qi leel into two parts will be cooled down：Part warp
Mix with also Primordial Qi after compressor compresses, be circulated utilization；Another part is delivered in heating furnace as fuel.
Embodiment 5
From low temperature distillation coal gas in coal as also Primordial Qi.Middle low temperature distillation coal gas enters in heating furnace after desulfurization,
It is heated to 850 DEG C.Then entered in hydrogen shaft furnace by the thermal reduction gas entrance in the middle part of hydrogen shaft furnace.Laterite nickel ore oxidized pellet
Sent into through the hopper at the top of hydrogen shaft furnace.Wherein, in laterite nickel ore oxidized pellet, the mass content of nickel is 0.5%, the matter of iron
Amount content is 50%.After also Primordial Qi enters in hydrogen shaft furnace, under conditions of being catalyst in iron and nickel, reform by cracking and certainly
Reaction, produces synthesis also Primordial Qi, wherein H2It is 91% with the volume fraction of CO.And H2/ CO is 2.0.Synthesis also Primordial Qi is transported upwards
It is dynamic, the laterite nickel ore oxidized pellet that heating, reduction are moved from top to bottom on hydrogen shaft furnace top, the recovery time is 4h.In shaft furnace
There is carburization reaction in bottom, reduced metallic pellets, and after cooling, discharged by the hopper of shaft furnace bottom.Synthesis also Primordial Qi
Gas outlet discharge after completion reduction reaction from the top of hydrogen shaft furnace, scrubbed cooling, dust removal process.Then will cooling qi leel into
Two parts：A part mixes after being compressed through compressor with also Primordial Qi, is circulated utilization；Another part delivers to conduct in heating furnace
Fuel.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously
The non-restriction to implementation method.For those of ordinary skill in the field, can also do on the basis of the above description
Go out the change or variation of other multi-forms.There is no need and unable to be exhaustive to all of implementation method.And thus drawn
Obvious change that Shen goes out or among changing still in protection scope of the present invention.
Claims (10)
1. a kind of system that hydrogen shaft furnace dry method deadweight straightening connects reducing and smelting lateritic nickel ore, it is characterised in that the system bag
Include desulfurizer, heating furnace, hydrogen shaft furnace；
The desulfurizer has also Primordial Qi entrance, desulfurization also Primordial Qi outlet；
There are the heating furnace desulfurization also Primordial Qi entrance, thermal reduction gas to export；Wherein, the desulfurization also Primordial Qi entrance is de- with described
The desulfurization of sulphur device also Primordial Qi outlet connection；
The hydrogen shaft furnace has lateritic nickel ore entrance, thermal reduction gas entrance, reduced metallic pellets outlet, gas outlet；Wherein, institute
Thermal reduction gas entrance is stated to be connected with the thermal reduction gas outlet of the heating furnace.
2. system according to claim 1, it is characterised in that also including wash cooling device, it has air inlet, cooling
Gas is exported；The air inlet is connected with the gas outlet of the hydrogen shaft furnace, and the cooling gas exports the cooling with the heating furnace
Gas entrance is connected.
3. system according to claim 2, it is characterised in that also including compressor, it has cooling gas entrance, compresses cold
But gas outlet；The cooling gas entrance is connected with the cooling gas outlet of the wash cooling device, and compression cooling gas is exported and institute
State the compression cooling gas entrance connection of desulfurizer.
4. system according to claim 1, it is characterised in that the lateritic nickel ore entrance is arranged on the hydrogen shaft furnace
Top；The thermal reduction gas entrance is arranged on the middle part of the hydrogen shaft furnace；The gas outlet is arranged on the hydrogen shaft furnace
Top；The reduced metallic pellets outlet is arranged on the bottom of the hydrogen shaft furnace.
5. the method that a kind of one of utilization claim 1-4 described system is reduced directly smelting red clay nickel ore, its feature exists
In, including step：
The also Primordial Qi is then fed into being heated in the heating furnace via the desulfurizer desulfurization, obtains thermal reduction gas；
During the thermal reduction gas are sent into the hydrogen shaft furnace, and to adding iron and nickel in the hydrogen shaft furnace as catalyst,
The thermal reduction gas are issued in the catalytic action of the iron and nickel is conigenous reforming reaction, obtains synthesis also Primordial Qi；
To lateritic nickel ore is added in the hydrogen shaft furnace, it is anti-that the lateritic nickel ore contacts generation reduction with the synthesis also Primordial Qi
Should, reduced metallic pellets are obtained, the iron contained in the reduced metallic pellets and nickel are used as the catalyst from reforming reaction.
6. method according to claim 5, it is characterised in that also including step：
The synthesis also Primordial Qi is discharged after there is reduction reaction through by the gas outlet at the top of the hydrogen shaft furnace, and sends into institute
Stating after carry out wash cooling in wash cooling device, obtaining cooling down gas；
During the cooling pneumatic transmission entered into the heating furnace, and, during the cooling pneumatic transmission entered into the desulfurizer.
7. method according to claim 5, it is characterised in that the temperature of the thermal reduction gas is 850~1050 DEG C.
8. method according to claim 5, it is characterised in that in the lateritic nickel ore mass content of nickel be 0.5~
3%, the mass content of iron is 10~50%.
9. method according to claim 5, it is characterised in that H in the synthesis also Primordial Qi2With volume ratio >=90% of CO；
And H2It is 1.0~2.0 with the ratio of CO.
10. method according to claim 5, it is characterised in that the time of the reduction reaction is 2~4h.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107138163A (en) * | 2017-06-09 | 2017-09-08 | 太原理工大学 | A kind of utilization lateritic nickel ore prepares method and the application of synthetic methane catalyst |
| CN115094181A (en) * | 2022-06-10 | 2022-09-23 | 中钢设备有限公司 | Method and apparatus for heating DRI reducing gas using plasma |
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| CN115094181A (en) * | 2022-06-10 | 2022-09-23 | 中钢设备有限公司 | Method and apparatus for heating DRI reducing gas using plasma |
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