CN109402317A - Method for producing metal by high-efficiency metal oxide carbothermic reduction and porous material cake used by same - Google Patents
Method for producing metal by high-efficiency metal oxide carbothermic reduction and porous material cake used by same Download PDFInfo
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- CN109402317A CN109402317A CN201710880565.7A CN201710880565A CN109402317A CN 109402317 A CN109402317 A CN 109402317A CN 201710880565 A CN201710880565 A CN 201710880565A CN 109402317 A CN109402317 A CN 109402317A
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- metal oxide
- oxide
- carbon
- porous material
- cake
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- 229910044991 metal oxide Inorganic materials 0.000 title claims abstract description 51
- 150000004706 metal oxides Chemical class 0.000 title claims abstract description 51
- 239000011148 porous material Substances 0.000 title claims abstract description 45
- 230000009467 reduction Effects 0.000 title claims abstract description 28
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 18
- 239000002184 metal Substances 0.000 title claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 title abstract description 4
- 238000006722 reduction reaction Methods 0.000 claims abstract description 66
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 59
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 58
- 238000000034 method Methods 0.000 claims abstract description 33
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 25
- 239000000853 adhesive Substances 0.000 claims abstract description 13
- 230000001070 adhesive effect Effects 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 239000003245 coal Substances 0.000 claims description 6
- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 5
- 230000000996 additive effect Effects 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000000571 coke Substances 0.000 claims description 5
- 239000000470 constituent Substances 0.000 claims description 5
- 239000003610 charcoal Substances 0.000 claims description 4
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 claims description 3
- 239000005751 Copper oxide Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- 229910000431 copper oxide Inorganic materials 0.000 claims description 3
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 3
- 229910000480 nickel oxide Inorganic materials 0.000 claims description 3
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 claims description 3
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 claims description 3
- 229910001950 potassium oxide Inorganic materials 0.000 claims description 3
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 3
- 229910001948 sodium oxide Inorganic materials 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 229910000464 lead oxide Inorganic materials 0.000 claims description 2
- YEXPOXQUZXUXJW-UHFFFAOYSA-N oxolead Chemical compound [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 claims description 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 claims 2
- 229910001887 tin oxide Inorganic materials 0.000 claims 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 150000002927 oxygen compounds Chemical class 0.000 claims 1
- 239000004575 stone Substances 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 55
- 238000005453 pelletization Methods 0.000 description 24
- 229910052742 iron Inorganic materials 0.000 description 22
- 230000000052 comparative effect Effects 0.000 description 14
- 239000002994 raw material Substances 0.000 description 10
- 230000035484 reaction time Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000003723 Smelting Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 description 4
- 239000011707 mineral Substances 0.000 description 4
- 238000001228 spectrum Methods 0.000 description 4
- 238000005245 sintering Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011799 hole material Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- GCNLQHANGFOQKY-UHFFFAOYSA-N [C+4].[O-2].[O-2].[Ti+4] Chemical compound [C+4].[O-2].[O-2].[Ti+4] GCNLQHANGFOQKY-UHFFFAOYSA-N 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 125000003636 chemical group Chemical group 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000011143 downstream manufacturing Methods 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/10—Making spongy iron or liquid steel, by direct processes in hearth-type furnaces
- C21B13/105—Rotary hearth-type furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/007—Conditions of the cokes or characterised by the cokes used
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
- C21B13/0053—On a massing grate
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/006—Starting from ores containing non ferrous metallic oxides
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0066—Preliminary conditioning of the solid carbonaceous reductant
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/008—Use of special additives or fluxing agents
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
- C22B1/245—Binding; Briquetting ; Granulating with binders organic with carbonaceous material for the production of coked agglomerates
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B15/00—Other processes for the manufacture of iron from iron compounds
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/134—Reduction of greenhouse gas [GHG] emissions by avoiding CO2, e.g. using hydrogen
Abstract
The invention relates to a method for producing metal by high-efficiency carbothermic reduction of metal oxide and a porous cake used by the method. The method for producing metal by carbothermic reduction of high-performance metal oxide comprises the following steps: providing a porous cake, wherein the composition of the porous cake comprises a metal oxide, a carbon-containing reducing agent and a forming adhesive, and the porous cake is provided with a plurality of pore channels; and placing the porous material cake in a high-temperature furnace for carbothermic reduction reaction so as to reduce the metal oxide of the porous material cake into metal.
Description
Technical field
The present invention relates to a kind of metalliferous methods of life, and in more specific words it, be to be aoxidized about a kind of high-effect metal
Porous material cake object carbon thermal reduction raw metalliferous method and its used.
Background technique
It is blast furnace processing procedure that quotient, which turns mainstream iron-smelting process, now, and primary raw material is sinter, chou mine, block iron ore and coke
Charcoal, product are heating molten steel, supply downstream process to make steel.It requires height for material quality, and coal mine must first be smelt coke, and
Particulate iron ore must first sinter sinter into, begin to be added into blast furnace to be iron-smelting raw material, so technique is not avoided that coking and sintering
Equal raw materials pre-treating technology, other than long flow path and energy consumption are high, prevention and cure of pollution investment and cost are also especially high, especially titanium dioxide
Carbon (CO2) discharge intensity be intended to small be not easy.
Rotary hearth furnace (Rotary Hearth Furnace, RHF) technique is the iron-smelting process that quotient turns at present.The technique
It is pelletizing first to be made in metal oxide, then pelletizing is laid into about 1 to 2 thickness degree on the siege in ring-style rotational, and carry out
Heating makes pelletizing that reduction reaction occur to produce reduced iron processed (Direct Reduced Iron, DRI).But it is solid because being limited to technique
There is characteristic, there is the degree of metalization of DRI product and the relatively low problem of iron production capacity, reason is: (1) because belonging to oxidation in RHF furnace
Property atmosphere, as-reduced being oxidized easily property of metallic iron atmosphere reoxidize；(2) because of the limitation of furnace temperature, make radiant heat transfer efficiency compared with
Difference can not improve metallic iron yield again.
Refering to fig. 1, show the radiant heat reception behavior features of prior art multilayer pelletizing stack manner at the beginning of (a) reduction reaction
Phase and (b) schematic diagram of reduction reaction mid-term.The shortcomings that in order to improve RHF technique, the prior art are disclosed with multilayer pelletizing
The reduction reaction method of stack manner, though however, the above method can stop DRI to be oxidized and can obtain higher metal conversion ratio again
DRI, but potential problem is that bottom pelletizing can not receive radiant heat, as shown in Figure 1, the pelletizing of first layer and the second layer can be straight
Radiant heat is received, but the pelletizing of n-th layer is covered by the pelletizing on top, can not directly receive radiant heat, causes reduction anti-
It should carry out slowly.Therefore, such as n-th layer pelletizing to be made to receive radiant heat, needs that pelletizing heated heating in upper layer is waited to restore
When reaction, sintering shrinkage occurs for pelletizing, locally opens radiant heat and passes path, radiant heat could be from upper layer step by step toward next
Layer pelletizing transmitting, and make the heated heating of next layer of pelletizing that reduction reaction and sintering shrinkage occur.
However, the reduction reaction behavior of each layer pelletizing under variety classes raw material or different operation furnace temperature is inconsistent, such as scheme
N-th layer shown in picture (b) in 1, pelletizing may expand or dusting during reduction reaction, in some instances it may even be possible to occur softening or
Melting.Once above-mentioned phenomenon occurs for the pelletizing for being located at upper layer, the radiant heat towards bottom passes path then can be shielded, causes to radiate
Heat can not be transferred to next layer of pelletizing, so that reduction reaction can not be induced to occur, and then can not obtain higher metal reduction
Rate.
Summary of the invention
One object of the present invention is just to provide an innovation and has the high-effect metal oxide carbon thermal reduction of progressive
Raw metalliferous method and its porous material cake used, to solve the above-mentioned problems of the prior art.
In one embodiment, the present invention provides a kind of high-effect metal oxide carbon thermal reductions to give birth to metalliferous method,
Method includes the following steps:
Porous material cake is provided, the constituent of the porous material cake include metal oxide, carbon containing reducer and molding adhesive,
And porous material cake has multiple ducts；And
The porous material cake is placed in high temperature furnace and carries out carbothermic reduction reaction, so that the metal oxide of porous material cake is also
Original is at metal.
In one embodiment, the present invention provides a kind of porous material cake, constituent includes metal oxide, carbon containing reduction
Agent and molding adhesive, and the porous material cake has multiple ducts.
It is anti-to carry out carbon thermal reduction as raw material kenel using the porous material cake with multiple ducts for technical solution of the present invention
It answers, can effectively solve the problems, such as that the bottom of the prior art pelletizing kenel stacking bed of material can not receive radiant heat, and material can be promoted
The internal rates of heat transfer of layer, and then improve the carbon thermal reduction rate of material bed bottom.
Detailed description of the invention
The radiant heat reception behavior features of Fig. 1 display prior art multilayer pelletizing stack manner are in (a) reduction reaction initial stage and (b)
The schematic diagram of reduction reaction mid-term.
The raw metalliferous method flow schematic diagram of the high-effect metal oxide carbon thermal reduction of Fig. 2 display present invention.
The structural schematic diagram of the porous material cake of Fig. 3 display present invention.
Figure label explanation:
30 porous material cakes
30A first surface
30B second surface
The duct 30H
The material portion to be restored 30M
The center C
D diameter
G spacing
T thickness
The thickness of the porous material cake of T
S21~S22 step
Specific embodiment
The raw metalliferous method flow schematic diagram of the high-effect metal oxide carbon thermal reduction of Fig. 2 display present invention.Fig. 3 is aobvious
Show the structural schematic diagram of the porous material cake of the present invention.Cooperate the step S21 and Fig. 3 refering to Fig. 2, provides a porous material cake 30, this is more
The constituent of hole material cake 30 includes metal oxide, carbon containing reducer and molding adhesive.
The content of the metal oxide is that 70 to 90wt% (total weight with metal oxide and carbon containing reducer is
100% benchmark), and preferably, the metal oxide is iron oxide, nickel oxide, copper oxide, lead oxide, manganese oxide, oxidation
Tin, potassium oxide, sodium oxide molybdena, zinc oxide or aforementioned at least two kinds of combination.In this state sample implementation, the metal oxide is in powder
Shape, to improve metal conversion ratio.
In one or more state sample implementations, the mineral containing metal oxide are can be used in the metal oxide.
The content of the carbon containing reducer is that 10 to 30wt% (total weight with metal oxide and carbon containing reducer is
100% benchmark), and preferably, the carbon containing reducer is carbon black, active carbon, coal, coke, graphite, charcoal or aforementioned at least two
The combination of kind.In this state sample implementation, the carbon containing reducer is in powdery, to improve reducing agent utilization rate.
The additive amount of the molding adhesive be the total weight of the metal oxide and carbon containing reducer 0.1% to
6%.
In this state sample implementation, the step of porous material cake 30 are provided include first by the metal oxide, it is carbon containing also
Former agent and molding adhesive are uniformly mixed into mixture, and later, the mixture is placed in molding die, described more to be made
Expect cake 30 in hole.Preferably, the thickness T of the porous material cake 30 is 30 to 150mm.
The porous material cake 30 has first surface 30A, second surface 30B and multiple duct 30H.The second surface
30B is relative to first surface 30A.The duct 30H can be connected to first surface 30A and second surface 30B, and also can the company of being not required to
It is logical.In this state sample implementation, the circular in cross-section shape of the duct 30H.Alternatively, in another state sample implementation, the duct
The cross section of 30H can be in multilateral shape.
In this state sample implementation, each duct 30H has diameter d, and has material portion to be restored between two adjoining cell channels 30H
30M, the material portion 30M to be restored have thickness t.
In addition, each duct 30H has a center C, and there is spacing G between the center C of two adjoining cell channels 30H.Preferably, to
The thickness t of reducing material portion 30M is less than the spacing G, so that material portion 30M to be restored can thermally equivalent.
Cooperate the step S22 and Fig. 3 refering to Fig. 2, it is anti-that the porous material cake 30 is placed in progress carbon thermal reduction in high temperature furnace
It answers, so that the metal oxide of porous material cake 30 is reduced into metal.In this step, the duct 30H of porous material cake 30 is in alignment with
The heat source (figure is not drawn) of high temperature furnace, so that radiant heat energy is uniformly transferred to the duct 30H.
In this state sample implementation, the temperature of the carbothermic reduction reaction is 900 DEG C to 1600 DEG C, and to improve metal conversion
Rate and metal yield, preferably, the temperature of the carbothermic reduction reaction is 1000 DEG C to 1550 DEG C, and the carbothermic reduction reaction
Time be 30 to 80 minutes, the preferable reaction time be 35 to 45 minutes.
The present invention carries out carbothermic reduction reaction as raw material kenel using the porous material cake 30 with multiple duct 30H, can
It effectively solves the problems, such as that the bottom of the prior art pelletizing kenel stacking bed of material can not receive radiant heat, and can be promoted inside the bed of material
Rates of heat transfer, and then improve the carbon thermal reduction rate of material bed bottom.
It now is described in detail the present invention with following Examples, does not mean that present invention is limited only by disclosed in these examples only
Content.
Refering to table 1, show comparative example, example 1 and example 2 metal oxide mineral source and chemical group
At.See also table 2, the source of the carbon containing reducer of display comparative example, example 1 and example 2 and chemical composition.
1. comparative example of table, example 1 and example 2 metal oxide mineral source and chemical composition
The source of the carbon containing reducer of 2. comparative example of table, example 1 and example 2 and chemical composition
[comparative example]
Comparative example is to carry out reduction reaction with multilayer pelletizing stack manner.Table 3 shows the reduction reaction conditions of comparative example
With the characteristic of the reduced iron of output.
The characteristic of the reduced iron of the reduction reaction conditions and output of 3. comparative example of table
The content ratio of metal oxide and carbon containing reducer in raw material is next mixed according to carbon-to-oxygen ratio (C/O) value.Carbon
C in oxygen ratio (C/O) is that the O using the full carbon in reducing agent as calculating benchmark, in carbon-to-oxygen ratio (C/O) is institute in metal oxide
Having can be by O atom total amount that carbon is restored.Carbon-to-oxygen ratio (C/O) is atom total amount ratio contained by C and O in ingredient.
After metal oxide and carbon containing reducer are according to carbon-to-oxygen ratio (C/O) value mixture, then suitable molding adhesive is added,
The adhesive additive amount of comparative example is the 2% of the total weight of metal oxide and carbon containing reducer.
After evenly mixing by above-mentioned raw material, it is fabricated to the pelletizing of diameter 14mm to 17mm.Pelletizing is layed in high temperature furnace
Siege on, about 7 to 8 layers of the bed of material, such as the distributing mode of Fig. 1.According to the reduction reaction conditions of table 3, the highest in high temperature furnace is also
Former reaction temperature is 1500 DEG C, and the reduction reaction time is respectively 60 minutes or 65 minutes.
As shown in table 3, the metallic iron conversion ratio of DRI obtained by sample number into spectrum P-1, P-2 and P-3 (remove by the metal Ferrum content of DRI
It is metallic iron conversion ratio with total iron content) it is sequentially 91.4%, 84.2% and 89.8%, and resulting metallic iron yield (DRI
Metallic iron weight divided by hearth area, then divided by reduction total time, as metallic iron yield) be sequentially 65.2,43.6 and
48.6Kg-M.Fe/(h*m2)。
[example 1]
Example 1 is to carry out reduction reaction in a manner of the porous material cake.Table 4 show example 1 reduction reaction conditions with
The characteristic of the reduced iron of output.
The characteristic of the reduced iron of the reduction reaction conditions and output of 4. example 1 of table
Three kinds of metal oxide mineral used in example 1 are identical as comparative example, carbon containing reducer coal #1 and coal #2's
Mixed proportion is also identical as comparative example.The additive amount for forming adhesive is also 2% with comparative example.
After evenly mixing by above-mentioned raw material, it is fabricated to porous material cake, as shown in Figure 3.The parameters of porous material cake are T
About 60mm, d about 16mm, G about 29mm and t about 25mm.
Porous material cake is placed on the siege in high temperature furnace, the reduction reaction conditions of foundation table 4, the highest in high temperature furnace is also
Former reaction temperature is 1450 DEG C, and the reduction reaction time is 35 minutes.
As shown in table 4, the resulting metallic iron conversion ratio of sample number into spectrum C-1, C-2 and C-3 be sequentially 90.5%, 83.2% and
95.5%, and resulting metallic iron yield is sequentially 90.2,62.4 and 69.6Kg-M.Fe/ (h*m2)。
Example 1 is compared with comparative example, it is possible to find, can be when carrying out reduction reaction in a manner of porous material pie state
Lower carbon-to-oxygen ratio (C/O) proportion, lower reduction reaction temperature and under the shorter reduction reaction time, obtain metallic iron conversion
The comparable reduced iron of rate, and metallic iron yield all has and is promoted significantly.
[example 2]
Example 2 is to carry out reduction reaction in a manner of the porous material cake.Table 5 show example 2 reduction reaction conditions with
The characteristic of the reduced iron of output.
The characteristic of the reduced iron of the reduction reaction conditions and output of 5. example 2 of table
For example 2 compared with example 1, used raw material is identical, and reduction reaction conditions are the difference is that will reduction
Reaction temperature is down to 1350 DEG C from 1450 DEG C, and the reduction reaction time extended to 45 minutes by 35 minutes.
The metallic iron conversion ratio of example 2 is compared with example 1, sample number into spectrum C-1 higher, sample number into spectrum C-5 and C-6
It is then slightly lower, but still fall within the reduced iron of high metal conversion ratio.
The metallic iron yield of example 2 is lower compared with example 1, the reason is that the reduction reaction time extends, causes
Metallic iron yield reduces.Though being still higher than comparative example significantly however, the metallic iron yield of example 2 is low compared with example 1.
Example 1 and example 2 carry out reduction reaction in a manner of porous material cake, can not only reach the conversion of height metal iron
Rate can also reach dynamical metallic iron yield.In addition, the usage amount of carbon containing reducer also can relatively lower.It is prior
It is that it is the important breakthrough of metallic iron smelting technique that reduction reaction temperature, which can be down to 1350 DEG C from 1500 DEG C,.
Above-described embodiment is only to illustrate the principle of the present invention and its effect, not the limitation present invention, therefore is familiar with this technology
Personage modify and change to above-described embodiment and do not take off spirit of the invention still.
Claims (17)
1. a kind of raw metalliferous method of high-effect metal oxide carbon thermal reduction, method includes the following steps:
Porous material cake is provided, the constituent of the porous material cake includes metal oxide, carbon containing reducer and molding adhesive, and more
Expect that cake has multiple ducts in hole；And
The porous material cake is placed in high temperature furnace and carries out carbothermic reduction reaction, so that the metal oxide of porous material cake is reduced into
Metal.
2. the raw metalliferous method of high-effect metal oxide carbon thermal reduction as described in claim 1, wherein providing porous material
The step of cake includes: that the metal oxide, carbon containing reducer and molding adhesive are uniformly mixed into mixture；And it will be described
Mixture is placed in molding die, the porous material cake is made.
3. the raw metalliferous method of high-effect metal oxide carbon thermal reduction as described in claim 1, wherein the metal oxygen
The content of compound is 70 to 90wt%.
4. the raw metalliferous method of high-effect metal oxide carbon thermal reduction as described in claim 1, wherein it is described it is carbon containing also
The content of former agent is 10 to 30wt%.
5. the raw metalliferous method of high-effect metal oxide carbon thermal reduction as described in claim 1, wherein the molding is glutinous
The additive amount of knot agent is the 0.1% to 6% of the total weight of the metal oxide and carbon containing reducer.
6. the raw metalliferous method of high-effect metal oxide carbon thermal reduction as described in claim 1, wherein the metal oxygen
Compound be iron oxide, nickel oxide, copper oxide, lead oxide, manganese oxide, tin oxide, potassium oxide, sodium oxide molybdena, zinc oxide or it is aforementioned extremely
Few two kinds of combination.
7. the raw metalliferous method of high-effect metal oxide carbon thermal reduction as described in claim 1, wherein it is described it is carbon containing also
Former agent is carbon black, active carbon, coal, coke, graphite, charcoal or aforementioned at least two kinds of combination.
8. the raw metalliferous method of high-effect metal oxide carbon thermal reduction as described in claim 1, wherein each duct has
One center, and there is spacing between the center of two adjoining cell channels.
9. the raw metalliferous method of high-effect metal oxide carbon thermal reduction as claimed in claim 8, wherein two adjoining cell channels
Between there is material portion to be restored, which has thickness, and the thickness in material portion to be restored is less than the spacing.
10. the raw metalliferous method of high-effect metal oxide carbon thermal reduction as described in claim 1, wherein the carbon heat is also
The temperature of original reaction is 900 DEG C to 1600 DEG C.
11. the raw metalliferous method of high-effect metal oxide carbon thermal reduction as described in claim 1, wherein the carbon heat is also
The time of original reaction is 30 to 80 minutes.
12. a kind of porous material cake, constituent includes metal oxide, carbon containing reducer and molding adhesive, and described porous
Expect that cake has multiple ducts.
13. porous material cake as claimed in claim 12, wherein the content of the metal oxide is 70 to 90wt%.
14. porous material cake as claimed in claim 12, wherein the content of the carbon containing reducer is 10 to 30wt%.
15. porous material cake as claimed in claim 12, wherein the additive amount of the molding adhesive is the metal oxide
With the 0.1% to 6% of the total weight of carbon containing reducer.
16. porous material cake as claimed in claim 12, wherein the metal oxide is iron oxide, nickel oxide, copper oxide, oxygen
Change lead, manganese oxide, tin oxide, potassium oxide, sodium oxide molybdena, zinc oxide or aforementioned at least two kinds of combination.
17. porous material cake as claimed in claim 12, wherein the carbon containing reducer is carbon black, active carbon, coal, coke, stone
Ink, charcoal or aforementioned at least two kinds of combination.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW106128019A TWI687520B (en) | 2017-08-18 | 2017-08-18 | High-efficiency metal oxide carbothermal reduction method for producing metal and porous cake used thereby |
| TW106128019 | 2017-08-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109402317A true CN109402317A (en) | 2019-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710880565.7A Pending CN109402317A (en) | 2017-08-18 | 2017-09-26 | Method for producing metal by high-efficiency metal oxide carbothermic reduction and porous material cake used by same |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20190055616A1 (en) |
| CN (1) | CN109402317A (en) |
| TW (1) | TWI687520B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI708852B (en) * | 2019-03-14 | 2020-11-01 | 中國鋼鐵股份有限公司 | Method for producing direct reduced iron using iron oxide-carbon composite pellets |
| CN113560591A (en) * | 2021-07-21 | 2021-10-29 | 安徽光智科技有限公司 | Preparation method of germanium metal balls |
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| US3922165A (en) * | 1974-08-16 | 1975-11-25 | Jaconvel Company | Method for direct reduction of iron ore using sleeve-shaped briquettes |
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| TWI532849B (en) * | 2014-12-10 | 2016-05-11 | China Steel Corp | Pressurized continuous production of small pieces of iron coke method |
| TWI568855B (en) * | 2016-04-21 | 2017-02-01 | 中國鋼鐵股份有限公司 | Compounded slag controlling method of producing carbothermic reaction of iron at tall pellets bed |
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- 2017-08-18 TW TW106128019A patent/TWI687520B/en not_active IP Right Cessation
- 2017-09-26 CN CN201710880565.7A patent/CN109402317A/en active Pending
- 2017-12-21 US US15/851,394 patent/US20190055616A1/en not_active Abandoned
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| US3715764A (en) * | 1971-05-13 | 1973-02-13 | Bethlehem Steel Corp | High porosity manganese oxide pellets |
| CN87102333A (en) * | 1987-03-30 | 1987-08-26 | 张星辰 | Direct Steel Process |
| CN1861265A (en) * | 2005-04-22 | 2006-11-15 | 纪礽辉 | Ore-dressing process by using carbon-contg. block to reduce lean iron ore for prodn. of magnetite |
| CN101665851A (en) * | 2008-09-03 | 2010-03-10 | 贾会平 | Three-step metal reducing method |
| CN101724726A (en) * | 2008-10-29 | 2010-06-09 | 贾会平 | Method and device for ironmaking by smelting |
| CN101956037A (en) * | 2010-08-31 | 2011-01-26 | 贾会平 | Method and device for indirect heating type reduction iron making |
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| TWI708852B (en) * | 2019-03-14 | 2020-11-01 | 中國鋼鐵股份有限公司 | Method for producing direct reduced iron using iron oxide-carbon composite pellets |
| CN113560591A (en) * | 2021-07-21 | 2021-10-29 | 安徽光智科技有限公司 | Preparation method of germanium metal balls |
| CN113560591B (en) * | 2021-07-21 | 2023-04-21 | 安徽光智科技有限公司 | Preparation method of germanium metal pellets |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI687520B (en) | 2020-03-11 |
| TW201912802A (en) | 2019-04-01 |
| US20190055616A1 (en) | 2019-02-21 |
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